Alcator C-Mod Run 1120802 Information

Miniproposals

Miniproposal: 714

Date Filed: 7/21/2012

Title: MHD effects on massive gas injection disruption mitigation

First Author: Geoff Olynyk

Session Leader: Geoff Olynyk (shots 1-30)

Operators
Session leader(s):	Geoff Olynyk
Physics operator(s):	Bill Rowan
Engineering operator(s):	Andy Pfeiffer,Roza Tesfaye,Gary Dekow

Engineering Operator Run Comment
MP 714 MHD effects on massive gas injection disruption mitigation SL: Ol

Session Leader Plans

Entered: Aug 1 2012 04:19:47:670PM

Author: Geoff Olynyk

Session leader plan for run 1120802 (Thursday, August 2, 2012)
MP 714 - "MHD effects on massive gas injection disruption mitigation", run 1 of 2.
G.M. Olynyk

Objectives:

Scan plasma elongation (kappa) at constant safety factor in the limited
configuration, in order to determine the effect of kappa on important
disruption parameters;

Scan safety factor (q*) at constant elongation, in the lower-single-null
configuration, in order to determine the effect of safety factor on toroidal
radiation asymmetry in mitigated disruptions; and

Have plasmas at the same elongation (kappa=1.58) and safety factor (current
750 kA, field 4.0 T, safety factor q*=3.52) in both limited and
lower-single-null configuration in order to determine if the magnetic
configuration has an effect on important disruption parameters.

Gas request:

D2 majority fuelling.

Load Ar into B-side lower gas puff in order to get core rotation from HiReX
Jr.

Diagnostics & systems requested:

Fast magnetics – at least the low-n coils on stalks. [T. Golfinopoulos]

Two-color interferometer (TCI) [J. Irby]

ICRF – 1 MW, from E-port 2-strap antenna (transmitter #2) [S.J. Wukitch, Y. Lin]

X-ray tomography – at least array 3 [R.S. Granetz, I. Faust]

Core CXRS – impurity temperature and rotation [I. Bespamyatnov]

Foil bolometry [M.L. Reinke]

AXUV diode arrays AXA, AXJ with gains turned down for disruption mitigation [M.L. Reinke]

Disruption mitigation gas jets [R.S. Granetz]

Fast AXUV diode toroidal array (DMBolo) [G.M. Olynyk]

FRCECE – For fast radial profiles of electron temperature [P. Phillips, U. Texas]

Divertor thermocouples [D. Brunner]

IR imaging – To get divertor heat loads [J. Terry]

Core rotation from HiReX Jr [J. Rice, Y. Podpaly]

Core Thomson temperature and density, with custom timing for disruptions [J. Walk, J. Hughes]

Important note for diagnosticians: After disruption mitigation
gas jets are fired, torus pressures can rise as high as 1 torr. Although, we
will only fire a single gas jet on this day and so it shouldn't go above 500
mtorr. If you have sensitive diagnostics, these should have their protective
gate valves closed.

PhysOp instructions:
Nearly every shot today has a different elongation, density (nl04), and
field. Table to be given to PhysOp by Session Leader with list of shots, and
guidance to be given throughout the day.

Other instructions (Session Leader, auxiliary systems, diagnostic setup,
etc.):

Session Leader to announce that the (induced) disruptions will be at
t=1.000 s today, in order that people can time their diagnostics to this if
they wish.

ICRF request: 1 MW on E-antenna (transmitter #2), turning on at t=0.600 s,
remaining on until (induced) disruption at t=1.000 s. This will only
be for some shots (perhaps only one at the beginning).

Diagnostic neutral beam (DNB) to be shut off and locked out. This is for the
protection of the DNB, but also helps with DMBolo noise.

Load disruption mitigation gas jet plenums with mixture of 85% He, 15% Ar
on B-port (old) gas jet only. F-port (new) gas jet not used today.

Core Thomson scattering should be pulsed so the two lasers fire 0.5 ms
apart. Timing to be given to Thomson operator before each shot. Session Leader
to remind Thomson operator to re-arm the laser after every shot since it
automatically disabled after the gate valves close.

Run plan:

Establish baseline and shake down gas jet. Set up target
1120622012. Field 5.60 T, current 1.0 MA, LSN configuration, nl04=1.00
(target). Fire single (B-port) gas jet at t=1.000 s to confirm proper gas jet
operation. Repeat if necessary. (1 shot plus any required for gas jet
shakedown.)

Establish low-elongation limited plasma. Load target
1100908025 (kappa=1.3) but change field to 5.18 T, current to 750 kA. Density
target nl04 = 0.78. Inner-wall limited configuration. Fire B-port gas jet at
t=1.000 s. Repeat as necessary. (1 shot plus any required for discharge
development.)

Elongation scan in limited configuration at constant safety factor
and current. Proceed through list of shots in Session Leader's
spreadsheet, covering elongations of 1.30 (already covered in part 2) 1.50, 1.10,
1.01, and 1.58. All shots in this section have
plasma current of 750 kA. (4 shots plus any required for discharge
development.(

Safety factor scan in lower-single-null configuration at constant
elongation and current. Proceed through list of shots in Session
Leader's spreadsheet. All shots have plasma current of 750 kA, elongation of
1.58, and lower-single-null configuration. Field is 4.0, 5.0, 6.0, and 7.0 T.
(8 shots plus any required for discharge development.)

Repeat of elongation scan. Repeat the five shots from parts
2–3 of the SL_PLAN (to wit: kappa = 1.30, 1.50, 1.10, 1.01,
1.58). (5 shots.)

Repeat of safety factor scan. Repeat the four shots from part
4 of the SL_PLAN. Current is 750 kA for all shots, with field of 4.0, 5.0,
6.0, and 7.0 T. (4 shots.)

The reason for the twice-through scans of elongation and safety factor is that
in the past, we have seen variablity in the mitigated disruptions even given
identical target plasmas. We want to have at least two mitigated disruptions
into each target here to se if this is still the case.

It is noted that this plan comprises 19 useful shots, plus any required for
discharge development. Given the long inter-shot wait time on gas jet shots,
plus the extra-long wait time on the 7.0 T shots, this is an ambitious plan. We
hope to be able to accomplish the majority of the run plan.

Entered: Aug 1 2012 04:23:51:967PM

Author: Geoff Olynyk

Here is the planned list of shots (screenshot from spreadsheet) as of 4:25 pm on 2012-08-01.

Entered: Aug 1 2012 06:43:49:870PM

Author: Geoff Olynyk

*** Please note that today's run will have some shots at 7.0 T, which I understand counts as "high field" from an operational standpoint. ***

Physics Operators Plans

Entered: Aug 1 2012 02:39:40:357PM

Author: Bill Rowan

PhysOp Plan for Run 1120802

MP 714 MHD effects on massive gas injection disruption mitigation
SL: Olynyk
PO: Rowan

PO Plan is to follow the SL shot list.

-----------------
Engineering Setup
-----------------

Run begins at 09:00 and ends at 17:00

Power systems as on: 1090911018
** But set Fizzle Detector Gate Off time to 2.1sec, extend OH1, OH2U and OH2L
invert times to 2.3 seconds, if not already set there.

Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled

Gas setup:

Fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill B-main with 40 psi D2 Hybrid enabled (PG3)
leave H-bot as is Hybrid DISABLED (PG5)
fill NINJA with 10 psi D2 DISABLED

Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus/LoWEUS
Leave z-bolo shutter as is (should be open)

Torvac gatevalve toggle (yes/no): no

Boronization(yes/no): no
Overnight ECDC (yes/no): YES
ICRF(yes/no): YES, 1 MW from E-antenna, transmitter #2
LH(yes/no): no
Cryopump (yes/no): no
DNB (yes/no): no

Vessel temperature: 35/35/35

------------------------------
ECDC Parameters (if requested)
------------------------------
gas and pressure: D2 at 2e-4 Torr
sweep: 44/45/103 cm
scan: 20/120 s

Session Leader Summaries

Entered: Aug 2 2012 06:00:35:990PM

Author: Geoff Olynyk

Session leader summary for run 1120802
Thursday, August 2, 2012
MP 714 - "MHD effects on massive gas injection disruption mitigation" (run 1 of 2)
G.M. Olynyk

After a somewhat rocky start with data system problems (and one gas jet system failure due to the interlock box), we had a fantastic run day, completing the SL_PLAN by about 3:15 pm. Despite odd voltage transients on some of the TF power supplies, the machine behaved flawlessly, with no lost shots due to power systems issues. After a single shot with our 5.6 T, 1.0 MA lower single-null baseline to shake down the gas jet system and compare to previous gas jet disruption mitigation runs, we did a scan of elongation in the inner-wall limited configuration. This was a five-point scan, covering kappa = 1.01, 1.10, 1.30, 1.50, and 1.60. In all cases, we fired the B-jet only, at t = 1.000 s. The gas jet system was very reliable after the single interlock-box failure on shot 004. Then, we covered a four-point scan of safety factor (by varying field at constant plasma current) in the lower-single-null diverted configuration. By using toroidal fields of 4.0, 5.0, 6.0, and 7.0 T, we covered a range of q* from 3.36–5.87 (q₉₅ from 3.51–5.56). Both of these scans were then repeated, in order to quantify the variation in toroidal radiation asymmetry (and other disruption parameters) with identical target plasmas. We know that there is a large variation in the high-elongation diverted plasmas, and wanted to see if this was true for the low-elongation limited plasmas as well. All of these scans were done at a constant current of 750 kA so that the energy available to the disruption (~L*I^2) was constant. Also, by keeping the current constant, the Greenwald density was constant. We also kept the line-averaged density (nebar) as constant as possible (varying nl04 as we changed the elongation), so the Greenwald fraction was also constant through these scans. With the SL_PLAN complete, we were able to do some of the shots that were planned for the second run day, firing both gas jets using optimum timing into limited plasmas at low, medium, and high elongation. Finally, at the very end of the day, we tried one shot that was not planned at all: We fired a single gas jet (the B-port jet) into a locked mode. This was done as an exploration of whether the (2,1) mode, if present, might grow quickly and make the thermal quench radiation more symmetric. One could conceive of ITER or a reactor using non-axisymmetric coils to induce a (2,1) mode just before, or as, the gas jets are fired for disruption mitigation! Physics Operator Bill Rowan did a fantastic job of creating our unusual low-elongation inner-wall limited plasmas. It also helped that we had target shots from the MP 604 run ("Effect of elongation on the generation of disruption runaway electrons using LH-driven seed") on 2010-09-08 for the low-elongation limited plasmas. Pumpdown after gas jet firings seemed to be proceeding more quickly today than usual. Shot cycle times were just above 15 minutes on average, although at one point we took a shot too quickly and had a fizzle. Later in the day, we were closer to about 17 or 18 minutes between shots. Even on the high-field shots, magnet cooling was not the defining factor in the inter-shot times, probably because the induced disruptions meant that the field ramped down early. A preliminary glance at the toroidal radiation asymmetry data indicates that the disruptions (thermal quench and current quench) are very symmetric for mitigated disruptions in low-elongation inner-wall limited plasmas. This comports well with the hypothesis, based on the magnetic growth rates from run 1100908, that these (nearly) circular limited plasmas have fast n=1 growth rates, and thus low radiation asymmetry. I have a lot of very good data to analyze from today. I think that the evidence for the link between MHD and toroidal radiation asymmetry in mitigated disruptions is getting stronger, and the key now is to figure out what's going on and publish it ASAP.

Lessons learned:

- Shot cycle can be as little as 15 minutes if Session Leader and Physics Operator are disciplined, and we only fire one gas jet (raising torus pressure to about 300 mtorr). It's longer, more like 18 minutes, if both gas jets are fired and the F-jet doesn't run away. - The B-port gas jet (our OLD gas jet) continues to run reliably and consistently. With a pulse duration of 1.41 ms, it consistently injects about 1300 torr-l (according to the B-side bottom MKS pressure gauge). - The F-port gas jet, on the other hand, is much less consistent. With a drive current pulse duration of 2.50 ms, the pressure pulse produced is anywhere from 2.5 to 15 ms long (although we didn't get the 15 ms "runaway" pressure pulses today). It really needs to be serviced/rebuilt by ORNL. If only we had more time... - The torus pressures after firing the gas jet according to the thermocouple gauge are consistently about 30% lower than the readings on the B-bottom MKS gauge. The thermocouple gauge is calibrated with hydrogen, though, and so one would not expect the calibration to be exact in this argon–helium mixture that we use for disruption mitigation. - The thermocouple gauge seems to saturate at very high torus pressures (above 1 torr). We didn't reach these pressures today, though.

Shot summary:

The problematic part of the day:
001 - No-power shot due to data system problems
002 - No-power shot due to data system problems
003 - Data system test
004 - Plasma, but gas jet didn't fire (interlock box failure)

SL_PLAN part 1:
005 - Plasma and gas jet fired. This is our baseline (5.6 T, 1.0 MA LSN).

SL_PLAN parts 2–3:
006 - Good plasma, good gas jet. Kappa = 1.30
007 - Good plasma, good gas jet. Kappa = 1.50
008 - Good plasma, good gas jet. Kappa = 1.60
009 - Good plasma, good gas jet. Kappa = 1.10
010 - Good plasma, good gas jet. Kappa = 1.03

SL_PLAN part 4:
011 - Good plasma, good gas jet. Bt = 4.0 T
012 - Good plasma, good gas jet. Bt = 5.0 T
013 - Good plasma, good gas jet. Bt = 6.0 T
014 - Good plasma, good gas jet. Bt = 7.0 T

SL_PLAN part 5:
015 - Good plasma, good gas jet. Kappa = 1.30
016 - Good plasma, good gas jet. Kappa = 1.50
017 - Good plasma, good gas jet. Kappa = 1.10
018 - Good plasma, good gas jet. Kappa = 1.01
019 - Good plasma, good gas jet. Kappa = 1.60

SL_PLAN part 6:
020 - Good plasma, good gas jet. Bt = 4.0 T
021 - Good plasma, good gas jet. Bt = 5.0 T
022 - Fizzle. Gas jet still fired.
023 - Good plasma, good gas jet. Bt = 6.0 T
024 - Good plasma, good gas jet. Bt = 7.0 T

High-elongation, definitely limited:
025 - Plasma, gas jet fired successfully, but still dithering between limited and diverted
026 - Good plasma, good gas jet. Kappa = 1.57

Elongation scan with two gas jets (bonus):
027 - Good plasma, kappa=1.01, both gas jets fired
028 - Good plasma, kappa=1.30, both gas jets fired
029 - Good plasma, kappa=1.57, both gas jets fired

Firing single gas jet into locked mode (bonus):
030 - Good plasma (locked mode), B-jet fired successfully

Physics Operator Summaries

Entered: Aug 3 2012 07:55:30:167AM

Author: Bill Rowan

The run was in support of MP 714 "MHD effects on massive gas injection disruption mitigation" with SL Geoff Olynyk. Requirements for C-Mod operation included an elongation scan for a limited discharge and a q scan for a diverted discharge. Every shot included one or two massive gas injections. The run proceeded more quickly than expected, and the SL supplemented the plan by repeating some shots for statistics, adding a second massive gas injector (most of the shots used a single gas injector), and by adding a locked mode discharge.

The first shot was a lower single null based on 1120622012. Breakdown-and-ramp-up was taken from 1120731028. Taking the latter from the day previous to this run would not have been wise because of the segment 1 changes that were made. The resulting shot was used later in the run as a starting point for a q scan.

The reference shot for the elongation scan for a limited discharge was 1100908011. Clearin was used to vary the elongation. Run 1100908 contained some guidance for correlation of clearin with elongation. The elongation was varied from 1 to approximately 1.6. Efit suggested that a lower x-point formed intermittently at the highest elongation. The elongation was reduced in tiny steps to remove the x-point.

The first shots of the day were not successful due to computer problems.

Score card
25 plasmas
01 fizzle
04 engineering shots
-----
30 total

Session Leader Comments

Oct 1 2012 06:58:16:627PM Geoff Olynyk Here are the shots used for the kappa (elongation) scan. All were at a plasma current of 750 kA.

shot kappa Btor nebar Wth q ---------------------------------------------- 1120802010 1.0 6.9 1.37 31 3.45 1120802018 1.0 6.9 1.50 39 3.45 1120802009 1.1 6.3 1.44 32 3.57 1120802017 1.1 6.3 1.59 32 3.60 1120802006 1.3 5.2 1.46 30 3.59 1120802015 1.3 5.2 1.69 29 3.67 1120802007 1.5 4.3 1.60 24 3.77 1120802016 1.5 4.3 1.55 24 3.70 1120802008 1.6 4.0 1.59 23 3.79 1120802026 1.6 4.1 1.59 25 3.85

Oct 1 2012 08:56:05:053PM Geoff Olynyk Here are the shots used for the single gas jet safety factor scan on run 1120802. Plasma current was constant at 750 kA; toroidal field was varying. Configuration was ordinary LSN diverted with elongation of about 1.58.

shot q* q95 Btor nebar Wth ------------------------------------------------ 1120802011 3.4 3.46 4.08 1.40 22 1120802020 3.4 3.50 4.08 1.50 26 1120802012 4.2 4.28 5.03 1.59 28 1120802021 4.2 4.26 5.03 1.56 25 1120802013 5.0 5.03 5.96 1.57 29 1120802023 5.0 4.93 5.96 1.61 24 1120802014 5.9 5.58 6.89 1.56 22 1120802024 5.9 5.56 6.90 1.58 20

Aug 2 2012 08:35:17:987AM 1120802001 Geoff Olynyk Shot 1 - we are attempting to run an identical shot to 1120622012 (5.6 T, 1.0 MA).

Also - apparently we are experiencing some voltage transients on the TF bus, and the engineers want to keep the first few shots to a toroidal field of <= 5.6 T.

Aug 2 2012 09:20:21:903AM 1120802001 Geoff Olynyk Starting step 1 of SL_PLAN. We repeat shot 1120622012 except with B-jet only firing, at t=1.000 s. RF heated at 1.0 MW to increase stored energy.

Result: No-power shot due to computer problems (IGOR failure in INIT). Shouldn't have brought donuts. Shot 1 basically vanished from the data system (tree didn't copy).

B-port gas jet did fire successfully. Pressure after shot:

Thermocouple gauge - 253.8 mtorr
B-bottom MKS gauge - Don't seem to have any data from shot 1

Next shot - repeat of shot 1 (but with power). Despite this shot not existing in MDSplus, we're going to make the next one #002.

Aug 2 2012 09:36:27:727AM 1120802002 Geoff Olynyk Shot 2:
Attempt baseline again. Target 1120622012 except with B-jet only firing, at t=1.000 s. RF heated at 1.0 MW to increase stored energy.

Result: Another no-power shot due to data system problems. We skipped going into PULSE this time though, so the gas jet didn't fire. So we can take the next shot more quickly this time.

Pressure after shot:
Thermocouple gauge - N/A (didn't fire gas jet)
B-bottom MKS gauge - N/A (didn't fire gas jet)

Next shot:
Data system test. Do not fire gas jets.

Aug 2 2012 09:44:48:857AM 1120802003 Geoff Olynyk Shot 3

Plan:
Data system test. Doing this test because then we can turn around the shot cycle quickly rather than firing the gas jet and waiting 20 minutes for pumpdown.

Result: Data system worked.

Next shot:
Back to SL_PLAN, step 1.

Aug 2 2012 10:04:21:850AM 1120802004 Geoff Olynyk Shot 4:
Attempt baseline again. Target 1120622012 except with B-jet only firing, at t=1.000 s. RF heated at 1.0 MW to increase stored energy.

Result: Plasma. Gas jet didn't fire. B-jet was successfully enabled in MDSplus as we had a TTL pulse (look at /home/golynyk/scopes/gas_jets.dat). Nothing out of the interlock box though.

Pressure after shot:
Thermocouple gauge - no gas jet
B-bottom MKS gauge - no gas jet

Next shot: Repeat but (hopefully) fire gas jet. If it fails again, we'll bypass the interlock box.

Aug 2 2012 10:24:43:453AM 1120802005 Geoff Olynyk Shot 5

Plan:
Attempt baseline again. Target 1120622012 except with B-jet only firing, at t=1.000 s. RF heated at 1.0 MW to increase stored energy.

Result: Successfully disrupted with gas jet. Good DMBolo toroidal asymmetry data. For some reason entered H-mode at 0.885 s. This is about the 20th time we've run this discharge and that has never happened before. Stored energy 100 kJ at time of mitigated disruption.

Pressure after shot:
Thermocouple gauge - 251.1 mtorr
B-bottom MKS gauge - 362.5 mtorr

Next shot: Move to step 2 of SL_PLAN (kappa=1.3 inner-wall limited discharge).

Aug 2 2012 10:33:42:487AM 1120802006 Geoff Olynyk Shot 6

Plan:
Moving to step 2 of SL_PLAN. Attempting low-elongation inner-wall limited plasma with kappa=1.3, Bt=5.18 T, Ip=750 kA, nl04 = 0.78. No RF.

Result: Plasma ran beautifully. Gas jet fired successfully. Good DMBolo data.

Pressure after shot:
Thermocouple gauge - 245.7 mtorr
B-bottom MKS gauge - 362.2 mtorr

Next shot: Move to step 3 of SL_PLAN. Attempt for kappa=1.50 inner-wall limited plasma.

Aug 2 2012 10:58:45:167AM 1120802007 Geoff Olynyk Shot 7

Plan:
Moving to step 3 of SL_PLAN. Attempting low-elongation inner-wall limited plasma with kappa=1.5, Bt=4.28 T, Ip=750 kA, nl04 = 0.95. No RF.

Result: Good plasma, good gas jet, good DMBolo.

Pressure after shot:
Thermocouple gauge - 245.7 mtorr
B-bottom MKS gauge - 362.2 mtorr

Next shot: We're goign to go to the high-elongation, low-field part of the scan because of ongoing TF power supply voltage transients.

Aug 2 2012 11:10:28:367AM 1120802008 Geoff Olynyk Shot 8

Plan:
Going to high-elongation (kappa ~ 1.58) inner-wall limited. kappa=1.58, Bt=3.98 T, Ip=750 kA, nl04 = 0.94. No RF.

Result: Good plasma, good disruption.

Pressure after shot:
Thermocouple gauge - 235.4 mtorr
B-bottom MKS gauge - 342.9 mtorr

Next shot: Continuing elongation scan. Going to kappa=1.1, Bt=6.30 T, if we have permission from the engineers

Aug 2 2012 11:34:46:997AM 1120802009 Geoff Olynyk Shot 9

Plan:
Going to low-elongation (kappa ~ 1.1) inner-wall limited. kappa=1.10, Bt=6.30 T, Ip=750 kA, nl04 = 0.66. No RF.

Result: Good disruption.

Pressure after shot:
Thermocouple gauge - 259.3 mtorr
B-bottom MKS gauge - 380.5 mtorr

Next shot: Going to very low elongation (kappa=1.01), Bt=6.9 T.

Aug 2 2012 11:46:08:113AM 1120802010 Geoff Olynyk Shot 10

Plan:
Going to lowest-elongation (kappa ~ 1.01) inner-wall limited shape for this scan. kappa=1.01, Bt=6.90 T, Ip=750 kA, nl04 = 0.63. No RF.

Result: Good mitigated disruption.

Pressure after shot:
Thermocouple gauge - 248.4 mtorr
B-bottom MKS gauge - 361.8 mtorr

Next shot: Move to step 4 of SL_PLAN. Safety factor scan in elongated, LSN configuration.

Aug 2 2012 12:06:38:020PM 1120802011 Geoff Olynyk Shot 11

Plan:
Move to step 4 of SL_PLAN. Move to elongated, diverted (lower single-null) plasma and start safety factor scan at lowest q (lowest field).

Want Bt=4.0 T, Ip=750 kA. Same shape and density as baseline (shot 005 from today).

Result: Success.

Pressure after shot:
Thermocouple gauge - 227.2 mtorr
B-bottom MKS gauge - 332.1 mtorr

Next shot: Increase field to 5.0 T.

Aug 2 2012 12:20:57:973PM 1120802012 Geoff Olynyk Shot 12

Plan:
Increase field to 5.0 T (and thus safety factor). Plasma current remains at 750 kA. Density was a little low on the past one so PhysOp is increasing nl04 request.

Result: Good disruption. Good density control.

Pressure after shot:
Thermocouple gauge - 240.3 mtorr
B-bottom MKS gauge - 351.5 mtorr

Next shot: Up field to 6.0 T.

Aug 2 2012 12:34:09:450PM 1120802013 Geoff Olynyk Shot 13

Plan:
Increase field to 6.0 T (and thus safety factor). Plasma current remains at 750 kA. Density request (nl04) as per last shot.

Result: Good. Density target was dead-on.

Pressure after shot:
Thermocouple gauge - 240.3 mtorr
B-bottom MKS gauge - 351.1 mtorr

Next shot: Increase field to 7.0 T.

Aug 2 2012 12:46:38:223PM 1120802014 Geoff Olynyk Shot 14

Plan:
Increase field to 7.0 T. This is our highest field and safety factor for this scan. Plasma current remains at 750 kA. Density request (nl04) as per last shot.

Result:

Torus pressure after shot:
Thermocouple gauge - 253.8 mtorr
B-bottom MKS gauge - no data (reading –1400 mtorr)

Next shot: Enter step 5 of SL_PLAN. Repeat elongation scan at constant safety factor in limited configuration.

Aug 2 2012 01:06:23:750PM 1120802015 Geoff Olynyk Shot 15

Plan: Enter step 5 of SL_PLAN (repeat of elongation scan in limited configuration at constant safety factor). This shot is a repeat of shot 006 (kappa=1.30). Up the density slightly to get closer to target nebar of 1.55e20. Also change (delay) the timing of the Thomson pulses.

Result: Good disruption. Density a little high (nebar ~ 1.68)

Torus pressure after shot:
Thermocouple gauge - 229.8 mtorr
B-bottom MKS gauge - still messed up

Next shot: Repeat shot 007.

Aug 2 2012 01:22:49:547PM 1120802016 Geoff Olynyk Shot 16

Plan: Repeat of shot 007 (kappa=1.50). Lower the nl04 target by a couple percent to get closer to target nebar of 1.55e20. Also change (delay) the timing of the Thomson pulses.

Result: Good. Dead on nebar target. Gas jet and DMBolo good.

Torus pressure after shot:
Thermocouple gauge - 237.7 mtorr
B-bottom MKS gauge - 348.1 mtorr

Next shot: Reload 009 (kappa=1.10). Up nl04 target a bit to get closer to nebar target of 1.55

Aug 2 2012 01:35:58:933PM 1120802017 Geoff Olynyk Shot 17

Plan: Repeat of shot 009 (kappa=1.10). Increase the nl04 target by a few percent to get closer to target nebar of 1.55e20. Also change (delay) the timing of the Thomson pulses.

Result: Good.

Torus pressure after shot:
Thermocouple gauge - 229.8 mtorr
B-bottom MKS gauge - 336.3 mtorr

Next shot: Repeat shot 010

Aug 2 2012 01:55:42:427PM 1120802018 Geoff Olynyk Shot 18

Plan: Repeat of shot 010 (kappa=1.01). Increase the nl04 target by a ~7% to get closer to target nebar of 1.55e20. Also change (delay) the timing of the Thomson pulses.

Result: Good disruption. Gas jet and DMBolo worked well. Density was a little low (nebar ~ 1.50).

Torus pressure after shot:
Thermocouple gauge - 232.4 mtorr
B-bottom MKS gauge - 338.9 mtorr

Next shot: Repeat of shot 008 (kappa=1.58)

Aug 2 2012 02:06:25:367PM 1120802019 Geoff Olynyk Shot 19

Plan: Repeat of shot 008 (kappa=1.58). Also change (delay) the timing of the Thomson pulses.

Result: Good. Density right on.

Torus pressure after shot:
Thermocouple gauge - 245.7 mtorr
B-bottom MKS gauge - 358.8 mtorr

Next shot: Move to step 6 of SL_PLAN.

Aug 2 2012 02:22:22:413PM 1120802020 Geoff Olynyk Shot 20

Plan: Enter step 6 of SL_PLAN. Repeat of shot 011 (elongated LSN at Btor=4.0 T). Up the nl04 target relative to shot 011 to get closer to nebar target of 1.55. Delay second TS pulse vs. shot 011.

Result: Very good. Density slightly low (nebar ~ 1.50). Big asymmetries. Four separate flashes of light on DMBolo! These diverted plasmas have MUCH more complicated disruption sequences.

Torus pressure after shot:
Thermocouple gauge - 235.3 mtorr
B-bottom MKS gauge - 344.8 mtorr

Next shot: Up field to 5.0 T (repeat of shot 012)

Aug 2 2012 02:35:23:190PM 1120802021 Geoff Olynyk Shot 21

Plan: Repeat of shot 012 (elongated LSN at Btor=5.0 T). Delay Thomson pulses by 0.15 ms vs. shot 012.

Result: Everything good. Density dead on.

Torus pressure after shot:
Thermocouple gauge - 248.2 mtorr
B-bottom MKS gauge - Beserk again (no reading)

Next shot: Up field to 6.0 T.

Aug 2 2012 02:44:21:460PM 1120802022 Geoff Olynyk Shot 22

Plan: Repeat of shot 013 (elongated LSN at Btor=6.0 T). Leave nl04 target as is (was perfect on 013). Delay Thomson pulses by 0.15 ms vs. shot 013.

Result: Fizzle. Gas jet still fired, though.

Torus pressure after shot:
Thermocouple gauge - 229.8 mtorr
B-bottom MKS gauge - 336.7 mtorr

Next shot: Repeat, without fizzle.

Aug 2 2012 03:04:14:080PM 1120802023 Geoff Olynyk Shot 23

Plan: Repeat shot 22 but with plasma.

Result: Good this time.

Torus pressure after shot:
Thermocouple gauge - 245.7 mtorr
B-bottom MKS gauge - 359.8 mtorr

Next shot: Repeat shot 014. Change nothing except Thomson timing.

Aug 2 2012 03:26:35:523PM 1120802024 Geoff Olynyk Shot 24

Plan: Repeat of shot 014. Delay Thomson pulses by 0.15 ms. Density target same as 014.

Result: Good disruption. Density (nebar) right on.

Torus pressure after shot:
Thermocouple gauge - 248.4 mtorr
B-bottom MKS gauge - 356.8 mtorr

Next shot: That's it for the written plan! Moving into bonus (unwritten) phase of SL_PLAN. We're going to redo shot 19 but with the elongation reduced slightly to 1.55.

Aug 2 2012 03:41:39:017PM 1120802025 Geoff Olynyk Shot 25

Plan: Try high-elongation limited plasma again. Take shot 019 but reduce elongation slightly to prevent dithering between diverted and limited configurations. Aim for kappa=1.55

Result: Still flipping back and forth from limited to diverted. Good disruption though.

Torus pressure after shot:
Thermocouple gauge - 235.2 mtorr
B-bottom MKS gauge - 341.9 mtorr

Next shot: Reduce elongation a little more. And up field to 4.1 T.

Aug 2 2012 04:03:44:813PM 1120802026 Geoff Olynyk Shot 26

Plan: Try again to get good limited discharge and high elongation. Aim for kappa=1.55

Result: Nice high-elongation limited plasma. Success.

Torus pressure after shot:
Thermocouple gauge - 227.2 mtorr
B-bottom MKS gauge - 331.8 mtorr

Next shot: Fire both gas jets into low-elongation limited plasma (plasma identical to shot 018).

Aug 2 2012 04:15:19:853PM 1120802027 Geoff Olynyk Shot 27

Plan: We are going to repeat shot 18 exactly, except fire both gas jets in (with optimum timing). See Bob Granetz entry under MHD for timing information. Same Thomson timing as 018.

Result: Good stuff. Both gas jets fired. Second Thomson pulse was too late (didn't see anything).

Torus pressure after shot:
Thermocouple gauge - 486.1 mtorr
B-bottom MKS gauge - 716.0 mtorr

Next shot: Repeat shot 015 and fire two gas jets.

Aug 2 2012 04:36:41:200PM 1120802028 Geoff Olynyk Shot 28

Plan: We are going to repeat shot 15 exactly (inner-wall limited with kappa=1.30), except fire both gas jets in (with optimum timing). See Bob Granetz entry under MHD for timing information. Thomson timing to be advanced (earlier) on both pulses by 0.25 ms relative to shot 27.

Result: F-jet didn't let a lot of gas through this time (only about 300 torr-l) but we'll take it. Both Thomson pulses got profiles.

Torus pressure after shot:
Thermocouple gauge - 314.2 mtorr
B-bottom MKS gauge - 459.4 mtorr

Next shot: Go to high elongation (repeat of shot 26).

Aug 2 2012 04:55:10:477PM 1120802029 Geoff Olynyk Shot 29

Plan: We are going to repeat shot 026 exactly (inner-wall limited with kappa=1.57), except fire both gas jets in (with optimum timing). See Bob Granetz entry under MHD for timing information. Thomson timing to be identical to shot 028.

Result: Good stuff. Again the F-jet didn't stay open very long (only about 3.1 ms), but we'll take it. That's it for our two-jet scan.

Torus pressure after shot:
Thermocouple gauge - 338.9 mtorr
B-bottom MKS gauge - 497.6 mtorr

Next shot: SUPER BONUS! Fire B-jet only into locked mode at t=0.850 s.

Aug 2 2012 05:12:50:010PM 1120802030 Geoff Olynyk Shot 30

Plan: We are going to load a locked-mode discharge that creates a locked mode from t=0.800 s. We will fire the B-jet only at t=0.850 s. The reason for the earlier gas jet is because the locked modes often disrupt themselves before you get to t=1.000 s.

Result: Successfully fired into locked mode.

Torus pressure after shot:
Thermocouple gauge - 229.8 mtorr
B-bottom MKS gauge - 331.5 mtorr

Next shot: That's it. Very successful run. Tons of stuff to look at. Thanks everyone!

Physics Operator Comments

Aug 2 2012 09:07:40:427AM Bill Rowan load shot 1120622012 segment 01 and 02 are on
import segment 1 from 1120731028

verify these:
BT = 5.6 T, 154900 A
IP = 1 MA

changed engineering reference shot to 1120611012

set gatevalve toggle to on and set it for 60 s

torus pressure before the run is 2.1e-07 T

Aug 2 2012 09:25:22:577AM 1120802001 Bill Rowan 001.
no power shot due to computer problems
gate valve remained closed as requested
2.7e-07 before the next shot

Aug 2 2012 09:33:50:167AM 1120802002 Bill Rowan 002.
no power shot as 001

Aug 2 2012 09:34:31:393AM 1120802002 Bill Rowan bypassed pulse and went to recool

Aug 2 2012 09:35:25:540AM 1120802002 Bill Rowan
gas injection will be off until we get a plasma shot

Aug 2 2012 09:42:34:287AM 1120802003 Bill Rowan 003.
data system test
no power shot

Aug 2 2012 09:56:32:770AM 1120802004 Bill Rowan 004.
plasma
no gas jet
plasma full length into ramp down
1 MW ICRF as requested

Aug 2 2012 10:23:20:580AM 1120802005 Bill Rowan 005.
plasma
disruption at 1.0 s

for next shot
load from 1100908011
import segment 1 from 1120802005
recalculated predictors
Rcur, zcur, rxl, zxl, rxu,zxu,
pg1 (ar puff) set to 0.3 s and run for 60 ms
enabled pg1
BT = 0.5.18T
iP = 0.75MA
nl_04 = 0.78e+20

Aug 2 2012 10:42:14:343AM 1120802006 Bill Rowan 006.
plasma
disruption at 1 s
0.752 MA
0.82e+20
5.2T
kappa = 1.3

next shot
Bt = 4.28T, 117904
nl_04 = 0.95e+20
clearin = -0.025 for a kappa of 1.5

Aug 2 2012 10:53:38:537AM 1120802007 Bill Rowan 007.
plasma
disruption at 1 s
4.35 T
kappa = 1.5
nl_04 = 1.0e+20

Aug 2 2012 10:59:01:427AM 1120802007 Bill Rowan 007.
plasma
disruption at 1 s
4.35 T
kappa = 1.5
nl_04 = 1.0e+20

next shot.
BT = 3.98T, 109639
nl_04 = 0.97e+20
clearin = -0.017 for a kappa of 1.58

Aug 2 2012 11:19:07:583AM 1120802008 Bill Rowan 008.
plasma
BT = 4.06T
nl_04 = 1/02e+20
kappa - 1.64

next shot
Bt = 6.3 T, 173550
nl_04 = 0.68e+20
clearin = -0.075 for kappa =1.1

Aug 2 2012 11:37:04:760AM 1120802009 Bill Rowan 009.
BT = 6.24 T
nl_04 = 0.70e+20
kappa = 1.14

next shot.
BT = 6.9T, 190078
nl_04 =0.63e+20
clearin = -0.1

Aug 2 2012 11:53:01:703AM 1120802010 Bill Rowan 010.
BT = 6.8T
iP = 756 kA
kappa = 1.0
nl_04 = 0.65e+20

next shot
reload 1120802005
BT = 4.0T, 110190
ip = 0.75 MA

Aug 2 2012 12:09:12:263PM 1120802011 Bill Rowan 011.
plasma
IP = 0.74MA
BT = 4.1T
nl+04 = 0.84e_20
kappa = 1.57

next shot
increase nl_04=1.1e+20
BT=5 T, 137740

Aug 2 2012 12:19:29:053PM 1120802012 Bill Rowan 012.
plasma
BT = 5.0T
nl_04 = 0.92e+20
IP = 0.75 MA

next shot.
BT = 6 T, 165285

Aug 2 2012 12:32:30:830PM 1120802013 Bill Rowan 013.
plasma
BT=6.0T

next shot.
BT = 7.0T, 192833

Aug 2 2012 12:51:17:590PM 1120802014 Bill Rowan 014.
plasma
BT = 6.9 T

next shot
reload 1120802006
nl_04 = 0.83e+20

Aug 2 2012 01:04:02:773PM 1120802015 Bill Rowan 015.
plasma

next shot
reload 1120802007
nl_04 = 0.93e+20

Aug 2 2012 01:17:15:663PM 1120802016 Bill Rowan 016.
plasma

next shot
reload 1120802009

Aug 2 2012 01:34:33:640PM 1120802017 Bill Rowan 017.
plasma

next shot.
reload 1120802010

Aug 2 2012 01:48:59:557PM 1120802018 Bill Rowan 018.
plasma

next shot.
reload 1120802008

Aug 2 2012 02:05:05:397PM 1120802019 Bill Rowan 019.
plasma

next shot
reload 1120802011

Aug 2 2012 02:26:09:320PM 1120802020 Bill Rowan 020.
plasma

next shot
reload 110802012

Aug 2 2012 02:34:01:347PM 1120802021 Bill Rowan 021.
plasma

next shot
reload 1120802013

Aug 2 2012 02:54:13:350PM 1120802022 Bill Rowan 022.
fizzle

next shot.
no pcs changes

Aug 2 2012 03:02:04:930PM 1120802023 Bill Rowan 023.
plasma

next shot.
reload 1120802014

Aug 2 2012 03:26:53:583PM 1120802024 Bill Rowan 024.
plasma

next shot
reload 1120802019
reduce elongation slightly
clearin from -0.017 to -0.018

Aug 2 2012 04:04:05:943PM 1120802025 Bill Rowan 025.
plasma

next shot.
reduce elongation slightly
clearin from -0.018 to -0.20
increase TF from 4.0 T to 4.1 T, 112945

Aug 2 2012 04:03:41:200PM 1120802026 Bill Rowan 026.
plasma
kappa = 1.58

next shot
reload 1120802018
2 gas jets on this shot

Aug 2 2012 04:34:11:670PM 1120802028 Bill Rowan 028.
plasma

next shot
reload 1120802026

Aug 2 2012 04:54:59:460PM 1120802029 Bill Rowan 029
plasma

next shot
reload 1120725004, turn off segment 02, turn on segment 04
import segment 1 from 1120802029

Aug 2 2012 05:14:33:183PM 1120802030 Bill Rowan 030.
plasma
locked at 0.62 or a little later -- frcece or soft x-rays

last shot.

Engineering Operator Comments

Shot Time Type Status Comment

1 09:10:00:937AM Test Bad

2 09:28:32:397AM Test Bad

3 09:40:33:463AM Test Ok data cycle

4 09:48:35:687AM Plasma Ok

5 10:05:55:387AM Plasma Ok

6 10:27:38:327AM Plasma Ok

7 10:49:29:830AM Plasma Ok

8 11:05:49:230AM Plasma Ok

9 11:26:22:243AM Plasma Ok

10 11:42:39:067AM Plasma Ok

11 11:58:29:940AM Plasma Ok

12 12:13:14:903PM Plasma Ok

13 12:26:11:720PM Plasma Ok

14 12:40:37:080PM Plasma Ok

15 12:57:14:450PM Plasma Ok

16 01:14:48:100PM Plasma Ok

17 01:30:38:953PM Plasma Ok

18 01:44:41:153PM Plasma Ok

19 01:58:10:503PM Plasma Ok

20 02:12:38:480PM Plasma Ok

21 02:26:08:883PM Plasma Ok

22 02:39:46:980PM Plasma Ok

23 02:57:33:633PM Plasma Ok

24 03:17:01:420PM Plasma Ok

25 03:35:58:710PM Plasma Ok

26 03:53:55:980PM Plasma Ok

27 04:10:50:443PM Plasma Ok

28 04:30:48:907PM Plasma Ok

29 04:48:57:047PM Plasma Ok

30 05:06:34:677PM Plasma Ok

System Availability

Aug 2 2012 09:08:22:307AM

System Available Comment Availability
Changed Owner Description Who Can
Change
Active MHD no secured - tagged out Jun 2 2008 11:03:58:433AM (sears) Joe Snipes Active MHD Antenna golfit
BES yes BES system is online Nov 22 2011 02:21:12:050PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan
Bolometers yes Midplane diodes functioning properly. Midplane bolometers working and calibrated. DIV bolometers installed but not yet toaster calibrated Apr 20 2012 09:57:29:520AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization yes Jun 15 2012 05:02:46:313PM (dekow) Jim Irby Boronization dekow,irby
CECE yes The system is currently operational for Te tilde measurement. Talk to Choongki about the current configuration Jul 3 2012 04:38:00:317PM (nthoward) Anne White Correlation ECE nthoward,sck83,whitea
CNPA yes Multiple channel CNPA available, no safety risk for in-vessel access Apr 14 2011 12:01:59:693PM (parker) Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor yes Jun 15 2012 05:02:31:550PM (dekow) Brian LaBombard Upper Divertor Cryopump dekow,irby,labombard
CXRS yes core-CXRS system is online Nov 22 2011 02:21:22:280PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan
CXRS edge yes Michael CHurchill has primary responsibility at the moment Apr 19 2011 11:44:46:247AM (blip) Bruce Lipshultz Measurement of CXR light in the pedestal region at both the high- and low-field sides blip,rmchurch
D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 1 2009 09:45:41:090AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe
Dalsa no system is is installed and aligned, but not functional (appears to be a broken cable) Dec 5 2011 02:41:42:867PM (marmar) Earl Marmar Visible Bremsstrahlung Imaging marmar
Disruption Mitigation yes two gas jet valves active as of Feb 2012 May 15 2012 10:09:23:597AM (granetz) Robert Granetz Gas Jet granetz,whyte
Divertor IR no Mar 6 2007 10:50:41:677AM Glen Wurden Divertor IR Digital Video gwurden,terry
Divertor IR Spectroscopy no Mar 6 2007 10:51:39:897AM Glen Wurden Divertor IR Spectroscopy gwurden,terry
DMBolo AXUV diodes yes Diodes are taking usable data. Not all post-processing code is working yet. Feb 1 2012 01:24:23:953PM (golynyk) Geoff Olynyk Set of six AXUV diodes in a toroidal array of midplane wall boxes. golynyk,granetz,mlreinke,whyte
DNB yes "The beam could break at any moment." May 15 2012 10:09:52:470AM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,mochung
ECDC yes Apr 26 2012 03:23:19:057PM (dekow) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer
FRC-ECE yes FRC-ECE is online May 14 2012 11:53:01:693AM (bespam) Perry Phillips Heterodyne ECE-32 channels bespam,liao,phillips,rowan,whitea
FTCI yes System Operational May 14 2012 11:50:45:590AM (irby) Jim Irby Fast two-color interferometer irby
G-Side Ratiomatic yes Installed April 25,2012. New controller installed 5/29/2012 Jun 7 2012 10:40:00:957AM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
Glow Discharge no HV cables disconnected and power supplies off. Electrical plugs have been disconnected, capped and red tagged. Mar 5 2012 10:21:53:460AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby
GPC yes Operational Apr 27 2012 07:41:46:907AM (hubbard) Amanda Hubbard ECE Polychromater hubbard
GPC2 yes Operational Apr 27 2012 07:42:03:317AM (hubbard) Amanda Hubbard ECE Polychromater hubbard
GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 1 2009 09:45:50:933AM (terry) Jim Terry Gas Puff Imaging terry,zweben
H/D yes system is functional and taking data Dec 5 2011 02:42:29:857PM (marmar) Earl Marmar H/D Ratio marmar
HEAT yes Apr 26 2012 03:23:49:607PM (dekow) Gary Dekow - Machine Heaters - burke,dekow
Hirex Jr yes Hirex-Jr has been installed Jun 28 2010 03:36:33:420PM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr yes Installed and aligned. Will be available for Ti/Vr profiles after focusing tests and locked modes are taken. Dec 6 2011 08:21:02:453AM (ypodpaly) John Rice High Resolution X-Ray cgao,ldelgado,rice,ypodpaly
HXR yes 32 Channels operational,, no safety risk for in-vessel access Apr 14 2011 12:05:24:810PM (parker) Ron Parker Hard X-Ray Array faust,parker,schmidt
ICRF D-Antenna yes May 31 2012 09:20:06:827AM (wukitch) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes May 31 2012 09:19:57:640AM (wukitch) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes May 31 2012 09:19:47:443AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin
Impurity Spectroscopy yes Being upgraded with better optics and new spectrographs. Dan Miller has primary responsibility. Apr 19 2011 11:46:02:193AM (blip) Bruce Lipshultz Measurement of recycling light and impurity source rates at multiple surfaces around the tokamak blip,miller
Laser Blow-Off yes Pumped Down, Laser has not yet been tested but otherwise operational May 14 2012 04:31:17:037PM (nthoward) Martin Greenwald Impurity Injection System g,nthoward
Lower Hybrid yes LH is now available for plasma operation up to ~900 kW net power. Jul 3 2012 02:50:00:693PM (wallaceg) Ron Parker Lower Hybrid dterry,parker,wallaceg
Lower Hybrid Reflectometer no off Apr 15 2011 08:24:27:930AM (dominguez) Arturo Dominguez Lower Hybrid Reflectometer dominguez,marmar,parker,sgbaek
LoWEUS yes LoWEUS viewing the 10-30 nm region, spectral brightness vs. lambda and time are being stored in tree. Apr 20 2012 10:43:34:077AM (mlreinke) Matthew L. Reinke Long Wavelength Extreme Ultraviolet Spectrometer markchil,mlreinke
LPI no Beam line removed May 30 2008 02:09:12:833PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha no Midplane Lyman-a not functioning. New B-PORT Lyman (BPLY) still being debugged. Jul 12 2012 08:52:28:233AM (mlreinke) Matt Reinke Lyman alpha cameras faustian,labombard,mlreinke
Magnetics yes Dec 1 2011 11:51:51:970AM (g) Robert Granetz Bp coils and flux loops for equilibrium control granetz,wolfe
McPherson no McPherson under vacuum but is not run on a day-to-day basis. Can be requested if desired. LoWEUS has taken over as the primary Mo monitor. Jul 12 2012 08:53:14:937AM (mlreinke) Jim Terry VUV Spectrometer markchil,mlreinke,terry
Michelson yes Vacuum 3-4e-8 T. Starting with Michelson at reduced speed. Apr 27 2012 07:42:41:960AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes Dec 2 2011 12:27:47:163PM (toland) Brian LaBombard Baratron pressure gauges labombard,toland
MLP yes Operational. Connected to A-port probe system May 10 2012 08:40:19:910AM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard
MSE yes 2/29/2012 MSE operational. No HV or vacuum safety issues Feb 29 2012 12:26:13:863PM (sscott) Steve Scott Motional Stark Effect jinseok,sscott
Neutrons yes Voltage is on for He3 detectors on J port. Remaining voltages will be turned on for the first run. Apr 23 2012 09:31:22:063AM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes All detectors Powered On --- Waiting for neutrons for calibration Nov 22 2011 01:05:24:380PM (irby) Jim Irby X-Ray/Neutron Detectors at K-Hor irby
NINJA yes C-bottom and new F-bottom system ready. Dec 2 2011 12:28:44:843PM (toland) Brian LaBombard NINJA gas puff labombard,terry,toland
PCI yes Operational. Jul 10 2012 07:08:06:883PM (ntsujii) Miklos Porkolab Phase Contrast Imaging emd,ennever,ntsujii,porkolab
Penning Gauges yes HV power supplies turned ON in INIT, off in RECOOL May 10 2012 08:41:03:000AM (labombard) Brian LaBombard Penning Ionization Gauges labombard
Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Jul 1 2009 09:46:29:543AM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe
Polarimeter yes 3 chords operational but with high noise level Jan 6 2012 04:22:20:903PM (irby) Jim Irby C-Mod Polarimeter irby
Power - Alternator Air Switch yes Apr 26 2012 03:24:21:607PM (dekow) Gary Dekow Alternator to Power Room Power Supply Connection cochran,dekow,dterry,irby
Power - PEI yes Apr 26 2012 03:24:41:250PM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby
Power - TMX yes Apr 26 2012 03:24:57:153PM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby
Power Systems yes Apr 26 2012 03:25:14:497PM (dekow) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby
Probe Array - ISD yes Operational. Some dead probes. May 10 2012 08:41:58:120AM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH yes Operational. 4 out of 6 probes working. May 10 2012 08:41:40:557AM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes Operational. May 10 2012 08:42:13:733AM (labombard) Brian LaBombard Outer Lower Divertor Probe Array (F and J) labombard
Probe Array - UDIV yes Operational. Some dead probes. May 10 2012 08:42:32:663AM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes On 1120608, the high frequency channels: 112, 140 and the variable, have been disconnected for some troubleshooting. All other channels are connected Jun 14 2012 11:28:59:603AM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Operational. A variety of probe heads are ready for use. May 10 2012 08:43:10:937AM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes Operational. May 10 2012 08:43:24:887AM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP no Not functioning. Probe tips are melted. Repair not performed during break. May 10 2012 08:44:43:137AM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
Shoelace Antenna yes Operational May 10 2012 08:45:08:320AM (labombard) Brian LaBombard High-k active MHD antenna, for QCM, WCM studies golfit,labombard
SOL reflectometer yes c-port (top, middle, bottom) and h-port available. Only 1 of 4 locations can be used for each discharge May 1 2012 04:54:58:820PM (cornwall) Cornwall Lau SOL reflectometer cornwall,wukitch,ylin
Sparker yes Sparker Power Supply powered up. Connected at K port using red cable 4/23/12 9:25AM Apr 23 2012 12:06:10:983PM (parkin) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin
Surface Science Station yes SSS is under vacuum and fully available. Jul 3 2012 02:46:59:753PM (ochoukov) Bruce Lipschultz Radially scanning probe located on K-port blip,ochoukov
TCI yes TCI lasers in operation May 14 2012 11:51:18:700AM (irby) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes Operating with both lasers, density calibration ongoing. Jul 19 2012 10:20:09:220AM (jrwalk) Jerry Hughes Core Thomson scattering jrwalk,jwhughes,yma
TS - Edge yes Operating with both lasers, density calibration ongoing. Jul 19 2012 10:20:28:323AM (jrwalk) Jerry Hughes Millimeter resolution edge Thomson scattering jrwalk,jwhughes,yma
Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58:35:493AM (agraf) Alex Graf Visible Spectrometer agraf
XEUS yes XEUS viewing the 1-6 nm region, spectral brightness vs. lambda and time are being stored in tree. Apr 20 2012 10:43:43:107AM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer markchil,mlreinke
XTOMO yes ARRAY1->5 available. Specific channels on various arrays display issues. Apr 20 2012 05:36:28:523PM (faustian) Robert Granetz X-Ray Tomography faustian,granetz,mlreinke

Aug 2 2012 03:53:32:813PM

Brightness calibration for PMTs (LFS viewing)

use UV labsphere, connect fiber #58 (0.4mm) to PMT;

720 Background (UV off)
721 repeat
722 repeat

PMT CH1:
723 voltage: 0.5 diode: 0.546e-6 A
724 voltage: 0.6 diode: 0.546e-6 A
725 voltage: 0.7 diode: 0.540e-6 A
726 voltage: 0.8 diode: 0.540e-6 A
727 voltage: 0.9 diode: 0.539e-6 A
728 voltage: 1.0 diode: 0.539e-6 A
729 voltage: 1.01 diode: 0.546e-6 A taken at later time

Does not work: voltages 1.09, 1.05,1.02
Works: 1.01

Works: 0.48,0.46
Does not work: 0.45

PMT CH2:
730 background (ch 2 on 0.5)
731 voltage: 0.5 diode: 0.547e-6 A
732 voltage: 0.6 diode: 0.546e-6 A
733 voltage: 0.7 diode: 0.546e-6 A
734 voltage: 0.8 diode: 0.547e-6 A
735 voltage: 0.9 diode: 0.548e-6 A
736 voltage: 1.0 diode: 0.549e-6 A
737 voltage: 1.01 diode: 0.546e-6 A does not work

does not work: 1.1,

PMT CH3:
738 background (Ch 3 on 0.5)
739 voltage: 0.5 diode: 0.546e-6 A
740 voltage: 0.6 diode: 0.546e-6 A
741 voltage: 0.7 diode: 0.546e-6 A
742 voltage: 0.8 diode: 0.546e-6 A
743 voltage: 0.9 diode: 0.545e-6 A
744 voltage: 1.0 diode: 0.546e-6 A
745 voltage: 1.03 diode: 0.545e-6 A does not work

PMT CH4:
746 background (Ch 4 on 0.5)
747 voltage: 0.5 diode: 0.547e-6 A
748 voltage: 0.6 diode: 0.547e-6 A
749 voltage: 0.7 diode: 0.547e-6 A
750 voltage: 0.8 diode: 0.549e-6 A
751 voltage: 0.9 diode: 0.546e-6 A
? 752 voltage: 1.0 diode: 0.423e-6 A (had to turn lamp down a bit...)
753 voltage: 1.03 diode: 0.424e-6 A does not work

not sure about 752, repeat it later...
770 voltage: 1.0 diode: 0.386e-6 A

PMT CH5:
754 background (Ch 5 on 0.5)
755 voltage: 0.5 diode: 0.386e-6 A
756 voltage: 0.6 diode: 0.387e-6 A
757 voltage: 0.7 diode: 0.385e-6 A
758 voltage: 0.8 diode: 0.386e-6 A
759 voltage: 0.9 diode: 0.386e-6 A
760 voltage: 1.0 diode: 0.386e-6 A
761 voltage: 1.03 diode: 0.386e-6 A does not work

PMT CH6:
need to turn lamp further down...
762 background (Ch 6 on 0.5)
763 voltage: 0.5 diode: 0.283e-6 A
764 voltage: 0.6 diode: 0.284e-6 A
765 voltage: 0.7 diode: 0.283e-6 A
766 voltage: 0.8 diode: 0.283e-6 A
767 voltage: 0.9 diode: 0.284e-6 A
768 voltage: 1.0 diode: 0.284e-6 A
769 voltage: 1.03 diode: 0.285e-6 A does not work

Transmission of fiber #58:

771 #58 and #57 connected to Ch6 (voltage 0.8, diode: 0.286e-6 A)
772 #57 connected to Ch6 (voltage 0.8, diode: 0.283e-6 A)
773 background

repeat

774 #58 and #57 connected to Ch6 (voltage 1.0, diode: 0.282e-6 A)
775 #57 connected to Ch6 (voltage 1.0, diode: 0.286e-6 A)
776 background

Aug 2 2012 06:57:38:630PM

Wavelength Calibrations
SETUP
Fstop: 1.8/1.8
Controller Gain: 2/2
ADC Offset: 225/200

photonSetup.pro
Number of Frames: 20
Length of Frames: 300 msec
Time to Start: 0.00 sec

Spectrometers WERE refocused before calibration
780 background
781 A1 A7 A13
782 A2 A8 A14
783 A3 A9 A15
784 A4 A10 A16
785 A5 A11 A17
786 A6 A12 A18

787 B1 B7 B13
788 B2 B8 B14
789 B3 B9 B15
790 B4 B10 B16
791 B5 B11 B17
792 B6 B12 B18

793 C1 C7 C13
794 C2 C8 C14
795 C3 C9 C15
796 C4 C10 C16
797 C5 C11 C17
798 C6 C12 C18

Session Leader Comments
Oct 1 2012 06:58:16:627PM		Geoff Olynyk	Here are the shots used for the kappa (elongation) scan. All were at a plasma current of 750 kA. shot kappa Btor nebar Wth q ---------------------------------------------- 1120802010 1.0 6.9 1.37 31 3.45 1120802018 1.0 6.9 1.50 39 3.45 1120802009 1.1 6.3 1.44 32 3.57 1120802017 1.1 6.3 1.59 32 3.60 1120802006 1.3 5.2 1.46 30 3.59 1120802015 1.3 5.2 1.69 29 3.67 1120802007 1.5 4.3 1.60 24 3.77 1120802016 1.5 4.3 1.55 24 3.70 1120802008 1.6 4.0 1.59 23 3.79 1120802026 1.6 4.1 1.59 25 3.85
Oct 1 2012 08:56:05:053PM		Geoff Olynyk	Here are the shots used for the single gas jet safety factor scan on run 1120802. Plasma current was constant at 750 kA; toroidal field was varying. Configuration was ordinary LSN diverted with elongation of about 1.58. *shot q q95 Btor nebar Wth** ------------------------------------------------ 1120802011 3.4 3.46 4.08 1.40 22 1120802020 3.4 3.50 4.08 1.50 26 1120802012 4.2 4.28 5.03 1.59 28 1120802021 4.2 4.26 5.03 1.56 25 1120802013 5.0 5.03 5.96 1.57 29 1120802023 5.0 4.93 5.96 1.61 24 1120802014 5.9 5.58 6.89 1.56 22 1120802024 5.9 5.56 6.90 1.58 20
Aug 2 2012 08:35:17:987AM	1120802001	Geoff Olynyk	Shot 1 - we are attempting to run an identical shot to 1120622012 (5.6 T, 1.0 MA). Also - apparently we are experiencing some voltage transients on the TF bus, and the engineers want to keep the first few shots to a toroidal field of <= 5.6 T.
Aug 2 2012 09:20:21:903AM	1120802001	Geoff Olynyk	Starting step 1 of SL_PLAN. We repeat shot 1120622012 except with B-jet only firing, at t=1.000 s. RF heated at 1.0 MW to increase stored energy. Result: No-power shot due to computer problems (IGOR failure in INIT). Shouldn't have brought donuts. Shot 1 basically vanished from the data system (tree didn't copy). B-port gas jet did fire successfully. Pressure after shot: Thermocouple gauge - 253.8 mtorr B-bottom MKS gauge - Don't seem to have any data from shot 1 Next shot - repeat of shot 1 (but with power). Despite this shot not existing in MDSplus, we're going to make the next one #002.
Aug 2 2012 09:36:27:727AM	1120802002	Geoff Olynyk	Shot 2: Attempt baseline again. Target 1120622012 except with B-jet only firing, at t=1.000 s. RF heated at 1.0 MW to increase stored energy. Result: Another no-power shot due to data system problems. We skipped going into PULSE this time though, so the gas jet didn't fire. So we can take the next shot more quickly this time. Pressure after shot: Thermocouple gauge - N/A (didn't fire gas jet) B-bottom MKS gauge - N/A (didn't fire gas jet) Next shot: Data system test. Do not fire gas jets.
Aug 2 2012 09:44:48:857AM	1120802003	Geoff Olynyk	Shot 3 Plan: Data system test. Doing this test because then we can turn around the shot cycle quickly rather than firing the gas jet and waiting 20 minutes for pumpdown. Result: Data system worked. Next shot: Back to SL_PLAN, step 1.
Aug 2 2012 10:04:21:850AM	1120802004	Geoff Olynyk	Shot 4: Attempt baseline again. Target 1120622012 except with B-jet only firing, at t=1.000 s. RF heated at 1.0 MW to increase stored energy. Result: Plasma. Gas jet didn't fire. B-jet was successfully enabled in MDSplus as we had a TTL pulse (look at /home/golynyk/scopes/gas_jets.dat). Nothing out of the interlock box though. Pressure after shot: Thermocouple gauge - no gas jet B-bottom MKS gauge - no gas jet Next shot: Repeat but (hopefully) fire gas jet. If it fails again, we'll bypass the interlock box.
Aug 2 2012 10:24:43:453AM	1120802005	Geoff Olynyk	Shot 5 Plan: Attempt baseline again. Target 1120622012 except with B-jet only firing, at t=1.000 s. RF heated at 1.0 MW to increase stored energy. Result: Successfully disrupted with gas jet. Good DMBolo toroidal asymmetry data. For some reason entered H-mode at 0.885 s. This is about the 20th time we've run this discharge and that has never happened before. Stored energy 100 kJ at time of mitigated disruption. Pressure after shot: Thermocouple gauge - 251.1 mtorr B-bottom MKS gauge - 362.5 mtorr Next shot: Move to step 2 of SL_PLAN (kappa=1.3 inner-wall limited discharge).
Aug 2 2012 10:33:42:487AM	1120802006	Geoff Olynyk	Shot 6 Plan: Moving to step 2 of SL_PLAN. Attempting low-elongation inner-wall limited plasma with kappa=1.3, Bt=5.18 T, Ip=750 kA, nl04 = 0.78. No RF. Result: Plasma ran beautifully. Gas jet fired successfully. Good DMBolo data. Pressure after shot: Thermocouple gauge - 245.7 mtorr B-bottom MKS gauge - 362.2 mtorr Next shot: Move to step 3 of SL_PLAN. Attempt for kappa=1.50 inner-wall limited plasma.
Aug 2 2012 10:58:45:167AM	1120802007	Geoff Olynyk	Shot 7 Plan: Moving to step 3 of SL_PLAN. Attempting low-elongation inner-wall limited plasma with kappa=1.5, Bt=4.28 T, Ip=750 kA, nl04 = 0.95. No RF. Result: Good plasma, good gas jet, good DMBolo. Pressure after shot: Thermocouple gauge - 245.7 mtorr B-bottom MKS gauge - 362.2 mtorr Next shot: We're goign to go to the high-elongation, low-field part of the scan because of ongoing TF power supply voltage transients.
Aug 2 2012 11:10:28:367AM	1120802008	Geoff Olynyk	Shot 8 Plan: Going to high-elongation (kappa ~ 1.58) inner-wall limited. kappa=1.58, Bt=3.98 T, Ip=750 kA, nl04 = 0.94. No RF. Result: Good plasma, good disruption. Pressure after shot: Thermocouple gauge - 235.4 mtorr B-bottom MKS gauge - 342.9 mtorr Next shot: Continuing elongation scan. Going to kappa=1.1, Bt=6.30 T, if we have permission from the engineers
Aug 2 2012 11:34:46:997AM	1120802009	Geoff Olynyk	Shot 9 Plan: Going to low-elongation (kappa ~ 1.1) inner-wall limited. kappa=1.10, Bt=6.30 T, Ip=750 kA, nl04 = 0.66. No RF. Result: Good disruption. Pressure after shot: Thermocouple gauge - 259.3 mtorr B-bottom MKS gauge - 380.5 mtorr Next shot: Going to very low elongation (kappa=1.01), Bt=6.9 T.
Aug 2 2012 11:46:08:113AM	1120802010	Geoff Olynyk	Shot 10 Plan: Going to lowest-elongation (kappa ~ 1.01) inner-wall limited shape for this scan. kappa=1.01, Bt=6.90 T, Ip=750 kA, nl04 = 0.63. No RF. Result: Good mitigated disruption. Pressure after shot: Thermocouple gauge - 248.4 mtorr B-bottom MKS gauge - 361.8 mtorr Next shot: Move to step 4 of SL_PLAN. Safety factor scan in elongated, LSN configuration.
Aug 2 2012 12:06:38:020PM	1120802011	Geoff Olynyk	Shot 11 Plan: Move to step 4 of SL_PLAN. Move to elongated, diverted (lower single-null) plasma and start safety factor scan at lowest q (lowest field). Want Bt=4.0 T, Ip=750 kA. Same shape and density as baseline (shot 005 from today). Result: Success. Pressure after shot: Thermocouple gauge - 227.2 mtorr B-bottom MKS gauge - 332.1 mtorr Next shot: Increase field to 5.0 T.
Aug 2 2012 12:20:57:973PM	1120802012	Geoff Olynyk	Shot 12 Plan: Increase field to 5.0 T (and thus safety factor). Plasma current remains at 750 kA. Density was a little low on the past one so PhysOp is increasing nl04 request. Result: Good disruption. Good density control. Pressure after shot: Thermocouple gauge - 240.3 mtorr B-bottom MKS gauge - 351.5 mtorr Next shot: Up field to 6.0 T.
Aug 2 2012 12:34:09:450PM	1120802013	Geoff Olynyk	Shot 13 Plan: Increase field to 6.0 T (and thus safety factor). Plasma current remains at 750 kA. Density request (nl04) as per last shot. Result: Good. Density target was dead-on. Pressure after shot: Thermocouple gauge - 240.3 mtorr B-bottom MKS gauge - 351.1 mtorr Next shot: Increase field to 7.0 T.
Aug 2 2012 12:46:38:223PM	1120802014	Geoff Olynyk	Shot 14 Plan: Increase field to 7.0 T. This is our highest field and safety factor for this scan. Plasma current remains at 750 kA. Density request (nl04) as per last shot. Result: Torus pressure after shot: Thermocouple gauge - 253.8 mtorr B-bottom MKS gauge - no data (reading –1400 mtorr) Next shot: Enter step 5 of SL_PLAN. Repeat elongation scan at constant safety factor in limited configuration.
Aug 2 2012 01:06:23:750PM	1120802015	Geoff Olynyk	Shot 15 Plan: Enter step 5 of SL_PLAN (repeat of elongation scan in limited configuration at constant safety factor). This shot is a repeat of shot 006 (kappa=1.30). Up the density slightly to get closer to target nebar of 1.55e20. Also change (delay) the timing of the Thomson pulses. Result: Good disruption. Density a little high (nebar ~ 1.68) Torus pressure after shot: Thermocouple gauge - 229.8 mtorr B-bottom MKS gauge - still messed up Next shot: Repeat shot 007.
Aug 2 2012 01:22:49:547PM	1120802016	Geoff Olynyk	Shot 16 Plan: Repeat of shot 007 (kappa=1.50). Lower the nl04 target by a couple percent to get closer to target nebar of 1.55e20. Also change (delay) the timing of the Thomson pulses. Result: Good. Dead on nebar target. Gas jet and DMBolo good. Torus pressure after shot: Thermocouple gauge - 237.7 mtorr B-bottom MKS gauge - 348.1 mtorr Next shot: Reload 009 (kappa=1.10). Up nl04 target a bit to get closer to nebar target of 1.55
Aug 2 2012 01:35:58:933PM	1120802017	Geoff Olynyk	Shot 17 Plan: Repeat of shot 009 (kappa=1.10). Increase the nl04 target by a few percent to get closer to target nebar of 1.55e20. Also change (delay) the timing of the Thomson pulses. Result: Good. Torus pressure after shot: Thermocouple gauge - 229.8 mtorr B-bottom MKS gauge - 336.3 mtorr Next shot: Repeat shot 010
Aug 2 2012 01:55:42:427PM	1120802018	Geoff Olynyk	Shot 18 Plan: Repeat of shot 010 (kappa=1.01). Increase the nl04 target by a ~7% to get closer to target nebar of 1.55e20. Also change (delay) the timing of the Thomson pulses. Result: Good disruption. Gas jet and DMBolo worked well. Density was a little low (nebar ~ 1.50). Torus pressure after shot: Thermocouple gauge - 232.4 mtorr B-bottom MKS gauge - 338.9 mtorr Next shot: Repeat of shot 008 (kappa=1.58)
Aug 2 2012 02:06:25:367PM	1120802019	Geoff Olynyk	Shot 19 Plan: Repeat of shot 008 (kappa=1.58). Also change (delay) the timing of the Thomson pulses. Result: Good. Density right on. Torus pressure after shot: Thermocouple gauge - 245.7 mtorr B-bottom MKS gauge - 358.8 mtorr Next shot: Move to step 6 of SL_PLAN.
Aug 2 2012 02:22:22:413PM	1120802020	Geoff Olynyk	Shot 20 Plan: Enter step 6 of SL_PLAN. Repeat of shot 011 (elongated LSN at Btor=4.0 T). Up the nl04 target relative to shot 011 to get closer to nebar target of 1.55. Delay second TS pulse vs. shot 011. Result: Very good. Density slightly low (nebar ~ 1.50). Big asymmetries. Four separate flashes of light on DMBolo! These diverted plasmas have MUCH more complicated disruption sequences. Torus pressure after shot: Thermocouple gauge - 235.3 mtorr B-bottom MKS gauge - 344.8 mtorr Next shot: Up field to 5.0 T (repeat of shot 012)
Aug 2 2012 02:35:23:190PM	1120802021	Geoff Olynyk	Shot 21 Plan: Repeat of shot 012 (elongated LSN at Btor=5.0 T). Delay Thomson pulses by 0.15 ms vs. shot 012. Result: Everything good. Density dead on. Torus pressure after shot: Thermocouple gauge - 248.2 mtorr B-bottom MKS gauge - Beserk again (no reading) Next shot: Up field to 6.0 T.
Aug 2 2012 02:44:21:460PM	1120802022	Geoff Olynyk	Shot 22 Plan: Repeat of shot 013 (elongated LSN at Btor=6.0 T). Leave nl04 target as is (was perfect on 013). Delay Thomson pulses by 0.15 ms vs. shot 013. Result: Fizzle. Gas jet still fired, though. Torus pressure after shot: Thermocouple gauge - 229.8 mtorr B-bottom MKS gauge - 336.7 mtorr Next shot: Repeat, without fizzle.
Aug 2 2012 03:04:14:080PM	1120802023	Geoff Olynyk	Shot 23 Plan: Repeat shot 22 but with plasma. Result: Good this time. Torus pressure after shot: Thermocouple gauge - 245.7 mtorr B-bottom MKS gauge - 359.8 mtorr Next shot: Repeat shot 014. Change nothing except Thomson timing.
Aug 2 2012 03:26:35:523PM	1120802024	Geoff Olynyk	Shot 24 Plan: Repeat of shot 014. Delay Thomson pulses by 0.15 ms. Density target same as 014. Result: Good disruption. Density (nebar) right on. Torus pressure after shot: Thermocouple gauge - 248.4 mtorr B-bottom MKS gauge - 356.8 mtorr Next shot: That's it for the written plan! Moving into bonus (unwritten) phase of SL_PLAN. We're going to redo shot 19 but with the elongation reduced slightly to 1.55.
Aug 2 2012 03:41:39:017PM	1120802025	Geoff Olynyk	Shot 25 Plan: Try high-elongation limited plasma again. Take shot 019 but reduce elongation slightly to prevent dithering between diverted and limited configurations. Aim for kappa=1.55 Result: Still flipping back and forth from limited to diverted. Good disruption though. Torus pressure after shot: Thermocouple gauge - 235.2 mtorr B-bottom MKS gauge - 341.9 mtorr Next shot: Reduce elongation a little more. And up field to 4.1 T.
Aug 2 2012 04:03:44:813PM	1120802026	Geoff Olynyk	Shot 26 Plan: Try again to get good limited discharge and high elongation. Aim for kappa=1.55 Result: Nice high-elongation limited plasma. Success. Torus pressure after shot: Thermocouple gauge - 227.2 mtorr B-bottom MKS gauge - 331.8 mtorr Next shot: Fire both gas jets into low-elongation limited plasma (plasma identical to shot 018).
Aug 2 2012 04:15:19:853PM	1120802027	Geoff Olynyk	Shot 27 Plan: We are going to repeat shot 18 exactly, except fire both gas jets in (with optimum timing). See Bob Granetz entry under MHD for timing information. Same Thomson timing as 018. Result: Good stuff. Both gas jets fired. Second Thomson pulse was too late (didn't see anything). Torus pressure after shot: Thermocouple gauge - 486.1 mtorr B-bottom MKS gauge - 716.0 mtorr Next shot: Repeat shot 015 and fire two gas jets.
Aug 2 2012 04:36:41:200PM	1120802028	Geoff Olynyk	Shot 28 Plan: We are going to repeat shot 15 exactly (inner-wall limited with kappa=1.30), except fire both gas jets in (with optimum timing). See Bob Granetz entry under MHD for timing information. Thomson timing to be advanced (earlier) on both pulses by 0.25 ms relative to shot 27. Result: F-jet didn't let a lot of gas through this time (only about 300 torr-l) but we'll take it. Both Thomson pulses got profiles. Torus pressure after shot: Thermocouple gauge - 314.2 mtorr B-bottom MKS gauge - 459.4 mtorr Next shot: Go to high elongation (repeat of shot 26).
Aug 2 2012 04:55:10:477PM	1120802029	Geoff Olynyk	Shot 29 Plan: We are going to repeat shot 026 exactly (inner-wall limited with kappa=1.57), except fire both gas jets in (with optimum timing). See Bob Granetz entry under MHD for timing information. Thomson timing to be identical to shot 028. Result: Good stuff. Again the F-jet didn't stay open very long (only about 3.1 ms), but we'll take it. That's it for our two-jet scan. Torus pressure after shot: Thermocouple gauge - 338.9 mtorr B-bottom MKS gauge - 497.6 mtorr Next shot: SUPER BONUS! Fire B-jet only into locked mode at t=0.850 s.
Aug 2 2012 05:12:50:010PM	1120802030	Geoff Olynyk	Shot 30 Plan: We are going to load a locked-mode discharge that creates a locked mode from t=0.800 s. We will fire the B-jet only at t=0.850 s. The reason for the earlier gas jet is because the locked modes often disrupt themselves before you get to t=1.000 s. Result: Successfully fired into locked mode. Torus pressure after shot: Thermocouple gauge - 229.8 mtorr B-bottom MKS gauge - 331.5 mtorr Next shot: That's it. Very successful run. Tons of stuff to look at. Thanks everyone!

Physics Operator Comments
Aug 2 2012 09:07:40:427AM		Bill Rowan	load shot 1120622012 segment 01 and 02 are on import segment 1 from 1120731028 verify these: BT = 5.6 T, 154900 A IP = 1 MA changed engineering reference shot to 1120611012 set gatevalve toggle to on and set it for 60 s torus pressure before the run is 2.1e-07 T
Aug 2 2012 09:25:22:577AM	1120802001	Bill Rowan	001. no power shot due to computer problems gate valve remained closed as requested 2.7e-07 before the next shot
Aug 2 2012 09:33:50:167AM	1120802002	Bill Rowan	002. no power shot as 001
Aug 2 2012 09:34:31:393AM	1120802002	Bill Rowan	bypassed pulse and went to recool
Aug 2 2012 09:35:25:540AM	1120802002	Bill Rowan	gas injection will be off until we get a plasma shot
Aug 2 2012 09:42:34:287AM	1120802003	Bill Rowan	003. data system test no power shot
Aug 2 2012 09:56:32:770AM	1120802004	Bill Rowan	004. plasma no gas jet plasma full length into ramp down 1 MW ICRF as requested
Aug 2 2012 10:23:20:580AM	1120802005	Bill Rowan	005. plasma disruption at 1.0 s for next shot load from 1100908011 import segment 1 from 1120802005 recalculated predictors Rcur, zcur, rxl, zxl, rxu,zxu, pg1 (ar puff) set to 0.3 s and run for 60 ms enabled pg1 BT = 0.5.18T iP = 0.75MA nl_04 = 0.78e+20
Aug 2 2012 10:42:14:343AM	1120802006	Bill Rowan	006. plasma disruption at 1 s 0.752 MA 0.82e+20 5.2T kappa = 1.3 next shot Bt = 4.28T, 117904 nl_04 = 0.95e+20 clearin = -0.025 for a kappa of 1.5
Aug 2 2012 10:53:38:537AM	1120802007	Bill Rowan	007. plasma disruption at 1 s 4.35 T kappa = 1.5 nl_04 = 1.0e+20
Aug 2 2012 10:59:01:427AM	1120802007	Bill Rowan	007. plasma disruption at 1 s 4.35 T kappa = 1.5 nl_04 = 1.0e+20 next shot. BT = 3.98T, 109639 nl_04 = 0.97e+20 clearin = -0.017 for a kappa of 1.58
Aug 2 2012 11:19:07:583AM	1120802008	Bill Rowan	008. plasma BT = 4.06T nl_04 = 1/02e+20 kappa - 1.64 next shot Bt = 6.3 T, 173550 nl_04 = 0.68e+20 clearin = -0.075 for kappa =1.1
Aug 2 2012 11:37:04:760AM	1120802009	Bill Rowan	009. BT = 6.24 T nl_04 = 0.70e+20 kappa = 1.14 next shot. BT = 6.9T, 190078 nl_04 =0.63e+20 clearin = -0.1
Aug 2 2012 11:53:01:703AM	1120802010	Bill Rowan	010. BT = 6.8T iP = 756 kA kappa = 1.0 nl_04 = 0.65e+20 next shot reload 1120802005 BT = 4.0T, 110190 ip = 0.75 MA
Aug 2 2012 12:09:12:263PM	1120802011	Bill Rowan	011. plasma IP = 0.74MA BT = 4.1T nl+04 = 0.84e_20 kappa = 1.57 next shot increase nl_04=1.1e+20 BT=5 T, 137740
Aug 2 2012 12:19:29:053PM	1120802012	Bill Rowan	012. plasma BT = 5.0T nl_04 = 0.92e+20 IP = 0.75 MA next shot. BT = 6 T, 165285
Aug 2 2012 12:32:30:830PM	1120802013	Bill Rowan	013. plasma BT=6.0T next shot. BT = 7.0T, 192833
Aug 2 2012 12:51:17:590PM	1120802014	Bill Rowan	014. plasma BT = 6.9 T next shot reload 1120802006 nl_04 = 0.83e+20
Aug 2 2012 01:04:02:773PM	1120802015	Bill Rowan	015. plasma next shot reload 1120802007 nl_04 = 0.93e+20
Aug 2 2012 01:17:15:663PM	1120802016	Bill Rowan	016. plasma next shot reload 1120802009
Aug 2 2012 01:34:33:640PM	1120802017	Bill Rowan	017. plasma next shot. reload 1120802010
Aug 2 2012 01:48:59:557PM	1120802018	Bill Rowan	018. plasma next shot. reload 1120802008
Aug 2 2012 02:05:05:397PM	1120802019	Bill Rowan	019. plasma next shot reload 1120802011
Aug 2 2012 02:26:09:320PM	1120802020	Bill Rowan	020. plasma next shot reload 110802012
Aug 2 2012 02:34:01:347PM	1120802021	Bill Rowan	021. plasma next shot reload 1120802013
Aug 2 2012 02:54:13:350PM	1120802022	Bill Rowan	022. fizzle next shot. no pcs changes
Aug 2 2012 03:02:04:930PM	1120802023	Bill Rowan	023. plasma next shot. reload 1120802014
Aug 2 2012 03:26:53:583PM	1120802024	Bill Rowan	024. plasma next shot reload 1120802019 reduce elongation slightly clearin from -0.017 to -0.018
Aug 2 2012 04:04:05:943PM	1120802025	Bill Rowan	025. plasma next shot. reduce elongation slightly clearin from -0.018 to -0.20 increase TF from 4.0 T to 4.1 T, 112945
Aug 2 2012 04:03:41:200PM	1120802026	Bill Rowan	026. plasma kappa = 1.58 next shot reload 1120802018 2 gas jets on this shot
Aug 2 2012 04:34:11:670PM	1120802028	Bill Rowan	028. plasma next shot reload 1120802026
Aug 2 2012 04:54:59:460PM	1120802029	Bill Rowan	029 plasma next shot reload 1120725004, turn off segment 02, turn on segment 04 import segment 1 from 1120802029
Aug 2 2012 05:14:33:183PM	1120802030	Bill Rowan	030. plasma locked at 0.62 or a little later -- frcece or soft x-rays last shot.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:10:00:937AM	Test	Bad
2	09:28:32:397AM	Test	Bad
3	09:40:33:463AM	Test	Ok	data cycle
4	09:48:35:687AM	Plasma	Ok
5	10:05:55:387AM	Plasma	Ok
6	10:27:38:327AM	Plasma	Ok
7	10:49:29:830AM	Plasma	Ok
8	11:05:49:230AM	Plasma	Ok
9	11:26:22:243AM	Plasma	Ok
10	11:42:39:067AM	Plasma	Ok
11	11:58:29:940AM	Plasma	Ok
12	12:13:14:903PM	Plasma	Ok
13	12:26:11:720PM	Plasma	Ok
14	12:40:37:080PM	Plasma	Ok
15	12:57:14:450PM	Plasma	Ok
16	01:14:48:100PM	Plasma	Ok
17	01:30:38:953PM	Plasma	Ok
18	01:44:41:153PM	Plasma	Ok
19	01:58:10:503PM	Plasma	Ok
20	02:12:38:480PM	Plasma	Ok
21	02:26:08:883PM	Plasma	Ok
22	02:39:46:980PM	Plasma	Ok
23	02:57:33:633PM	Plasma	Ok
24	03:17:01:420PM	Plasma	Ok
25	03:35:58:710PM	Plasma	Ok
26	03:53:55:980PM	Plasma	Ok
27	04:10:50:443PM	Plasma	Ok
28	04:30:48:907PM	Plasma	Ok
29	04:48:57:047PM	Plasma	Ok
30	05:06:34:677PM	Plasma	Ok