Alcator C-Mod Run 1110204 Information

Miniproposals

Miniproposal: 599

Date Filed: 2/24/2010

Title: Up/Down Poloidal Impurity Density Variation

First Author: Matt Reinke

Session Leader: Matt Reinke (shots 1-32)

Operators
Session leader(s):	Matt Reinke
Physics operator(s):	Jerry Hughes
Engineering operator(s):	Andy Pfeiffer,Sam Pierson

Engineering Operator Run Comment
MP599:Up/Down Poloidal Impurity Density Variation SL: M. Reinke PO: J. H

Session Leader Plans

Entered: Feb 1 2011 08:11:53:650AM

Author: Matt Reinke

SESSION LEADER PLAN FOR 1110203 - MP599:Up/Down Poloidal Impurity Density Variation
NOTE: 10-hr run day (8:00 am - 6:00 pm)

The purpose of this run is scan parameters throught to be responsible for causing poloidal variation of impurity density on a flux surface.
According to theory, the primary driver is ion collisionality (v_ii ~ n_i/T_i^3/2) and toroidal and poloidal magnetic fields (~Bt/Bp^2).

We seek to cover a wide operating space of C-Mod Ohmic plasmas in the variables Ip, Bt and nl04. Density will be scanned during the shot and Ip and Bt will be scanned shot to shot.
The space of interest is bounded by MARFEs at high density and locked modes (LM) at low density, both of which are Ip and Bt dependent.
Sufficient signal to make measurements of He-like Ar will limit low-Ip high nl04 operation to where Te0 ~1.0-1.5 keV.
Ohmic H-modes are also to be avoided, limiting Ip but since P_LH~n_e*Bt this is also a moving target. Above all, an administrative limit of Ip=1.4 MA for machine safety is expected.

DIAGNOSTICS:
all possible n_e and T_e (TS,TCI, FRCECE,GPC1,GPC2) with GPC1 set for 5.4 T and GPC2 set for 7.5 T.
HIREXSR/JR for emissivity, flows and temperatures. (use medium mask on He-like Ar crystal)
AXUV and XTOMO for 2D emissivity measurements
laser blow-off using molybdenum
DNB allowed if CXRS can make measurements in Ohmic plasmas
HFS/LFS scanning probes and SOL reflectometer encouraged to piggyback
GPI NOT ALLOWED at low density, D2-based GPI possible at higher density range

GAS SETUP:
Main-ion species: D2
B-SIDE-LOWER: ~1.5 psi Ar enabled
cryopump for first shot

REFERENCE SHOTS:
Locked-mode: 1110128022
Outer Gap Scan: 1101207005 (remove ICRF, add Ar pulse)
Equilibrium: 1110126013 (LSN w/ small SSEP to enable pumping)

1) Load reference equilibrium (Ip=600 kA, nl04=0.65, NO ICRF). Set nl04 ramp from 0.65-0.30 from t=0.7-1.4 seconds to check pumping and density control. Ar puff from 0.3-0.4 seconds at 75 V.

2) Locked mode calibration

Proceed with the current, field and density scans. At each Bt,Ip data point, two shots will be taken.
First scanning density from a moderate level down and then from a moderate density up. Use the table of values (in nl04 10^20 units) as a rough guide.
Ramp density over 0.7 < t < 1.4, adjust as necessary for shorter flattop in high field shots
If locked mode or MARFE are not reached, make note for possible extension of density scan after (A)-(D) are completed.
Adjust PG1 voltage as necessary for sufficient Ar signal and to minimize MARFE onset.

3) LOW-FIELD (A),(B) PART OF TABLE (no laser blow off)
(A1) Bt=3.3, Ip=0.6 - x2 shots
(A2) Bt=3.3, Ip=0.8 - x2 shots
(B1) Bt=2.7, Ip=0.6 - x2 shots

4) Locked mode calibration

5) Outer gap scan calibration

6) HIGH-FIELD (C) PART OF TABLE (enable Mo laser blow-off)
(C1) Bt=7.5, Ip=0.6 - x2 shots
(C2) Bt=7.5, Ip=0.8 - x2 shots
(C3) Bt=7.5, Ip=1.0 - x2 shots
(C4) Bt=7.5, Ip=1.2 - x2 shots
(C5) Bt=7.5, Ip=1.4 - x2 shots

7) MID-FIELD (D) PART OF TABLE (enable Mo laser blow-off)
(D1) Bt=5.4, Ip=0.6 - x2 shots
(D2) Bt=5.4, Ip=0.8 - x2 shots
(D3) Bt=5.4, Ip=1.0 - x2 shots
(D4) Bt=5.4, Ip=1.2 - x2 shots

8) Locked mode calibration

Physics Operators Plans

Entered: Feb 3 2011 01:43:31:693PM

Author: Jerry Hughes

PO Plan for 1110204
MP599:Up/Down Poloidal Impurity Density Variation
SL: M. Reinke
PO: J. Hughes

NOTE: This is a 10-hr run day (8:00--18:00)

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

Run begins at 08:00 and ends at 18:00

Perform 2 hours ECDC in D2 prior to beginning of run.

Power systems as on: 1110126013
***Note: There will be a sequence of 7.5T shots mid-run which will
necessitate a change to power supply settings, and perhaps enhanced
alternator speed. ***

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 1.5 psi Ar Hybrid enabled (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3)
fill NINJA with 10 psi D2 DISABLED

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

Torvac gatevalve toggle (yes/no): no

Boronization(yes/no): no
Overnight ECDC (yes/no): no. In AM, do 2 hours ECDC in D2.
ICRF(yes/no): no
LH(yes/no): no
Cryopump (yes/no): yes, available on first shot
DNB (yes/no): yes

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

------------------------------
Shot prep:
------------------------------

REFERENCE SHOTS (from SL):
Locked-mode: 1110128022 (5.4T, 800kA, cryopumped)
** Segment 4 is the active segment in this shot
Outer Gap Scan: 1101207005 (5.4T, 800kA-->400kA, IW limited)
** Segment 2 is the active segment in this shot
Equilibrium: 1110126013 (5.4T, 600kA LSN w/ small SSEP to enable pumping)
** Segment 2 is the active segment in this shot

SL's shot "plan":

1) Load reference equilibrium (Ip=600 kA, nl04=0.65, NO ICRF). Set nl04 ramp
from 0.65-0.30 from t=0.7-1.4 seconds to check pumping and density control. Ar
puff from 0.3-0.4 seconds at 75 V.

2) Locked mode calibration

3) LOW-FIELD (A),(B) PART OF TABLE (no laser blow off)
(A1) Bt=3.3, Ip=0.6 - x2 shots
(A2) Bt=3.3, Ip=0.8 - x2 shots
(B1) Bt=2.7, Ip=0.6 - x2 shots

4) Locked mode calibration

5) Outer gap scan calibration

6) HIGH-FIELD (C) PART OF TABLE (enable Mo laser blow-off)
(C1) Bt=7.5, Ip=0.6 - x2 shots
(C2) Bt=7.5, Ip=0.8 - x2 shots
(C3) Bt=7.5, Ip=1.0 - x2 shots
(C4) Bt=7.5, Ip=1.2 - x2 shots
(C5) Bt=7.5, Ip=1.4 - x2 shots

7) MID-FIELD (D) PART OF TABLE (enable Mo laser blow-off)
(D1) Bt=5.4, Ip=0.6 - x2 shots
(D2) Bt=5.4, Ip=0.8 - x2 shots
(D3) Bt=5.4, Ip=1.0 - x2 shots
(D4) Bt=5.4, Ip=1.2 - x2 shots

8) Locked mode calibration

Session Leader Summaries

Entered: Feb 7 2011 10:39:47:050AM

Author: Matt Reinke

A pretty successful day! We were able to get a large amount of MP599 forward field Ohmic parameter space covered. Also got a number of rotation reversals that should help fill in John's tables.
Thanks to PO and EO flexibility we were able to respond to alternator problems by getting lower field points at smaller RPM while they checked out vibration issues.

STARTUP TEST: 001
LOCKED MODES: 003,011,029
OUTER GAP SCAN: 013
(5 shots)

NL04 SCAN SHOTS: 004,006,008,009,014,015,017,018,020,021,022,023,025,026,028,030,031,032 (18 shots)
EARLY DISRUPTION: 002,005,007,010,012,024 (6 shots)
FIZZLE: 016 (1 shot)
NO POWER: 019,027 (2 shots)

Many of the disruptions were bricks and (check PO comments) didn't require much if any changes to run. The PO and EO were very patient with my crazy requests for shot-to-shot field and current changes.

We got good coverage of our operating space depsite a limited number of shots with nl04 scans. The nl04 scans became larger than intended, which is fine, but to get to lower density we had to simply start at lower density and then ramp up to the middle density.
This resulted in some fast density ramps at the later shot but I'll have to look at the data to see what's happening. Unlike 1100325 we didn't have any problems with MARFEs or locked modes. I think the LSN operation is the way to go for such wide parameter space scans.
We got Mo injections on a large fraction of the shots, focusing on the high field and current shots where the Te is high enough to see anything.

Below is plotted the (nl04,Ip) space covered at different fields.

SUMMARY OF IMPURITY INJECTIONS:
shot t LBO Z
------------------
015 0.92 N Mo

Physics Operator Summaries

Entered: Feb 4 2011 06:20:59:187PM

Author: Jerry Hughes

PO Summary for 1110204

We operated the machine today at fields of 2.7, 3.4, 5.4 and 7.5T, and
ran currents spanning from 0.6 to 1.4MA. All shots were Ohmic, and
most had some kind of density ramp programmed in. In addition to the
standard LSN equilibrium that was loaded to do the parameter scans, we
ran two types of calibration shots: locked modes for Hirex Sr and an
outer gap scan for the bolometery diagnostics. Aside from a few
slightly dirty startups and some early disruptions, the plasmas ran well,
and we completed a fair portion of the SL's run plan.

For this run I used all 4 segments: Seg1 for startups, Seg2 for the
baseline equilibrium, Seg3 for the outer gap scan and Seg4 for the
locked mode shots. In actuality I could have used 5 segments because
the 7.5T shots needed the high-field startup loaded as well. I was
kept pretty busy by all the switching around called out in the SL's
run plan. In addition, there were alternator vibration warnings on 2
occassions that forced us to back off of the high-field sequence and
return to lower field. (1680 RPM as opposed to 1710RPM)

There were some vertical instabilities in rampdown that were corrected
by backing off of elongation, and there was some fiddling with the
prefill to reduce bounces. But there were no major glitches that
needed addressing.

Some of the density ramps at lower density did not have robust
feedback. Steve Wolfe suggests that turning off the integral gain may
have helped this. He also noted that the high-field startup could have
perhaps used a tweak in the EF4 current (10 or 20A more
positive). But it was not thought beneficial to try to explore wither
of these changes.

Scorecard:

Useful shots: 19
(1,4,6,8,9,14,15,17,18,20,21,22,23,25,26,28,30,31,32)
Early disruptions: 5
(5,7,10,12,24)
Locked mode calibrations: 4
(2,3,11,29)
Outer gap scan calibration: 1
(13)
Fizzle: 1
(16)
No power shots due to alternator warnings: 2
(19,27)

Session Leader Comments

Feb 4 2011 08:15:31:107AM 1110204001 Matt Reinke got through flattop, density ramp down didn't quite make it to programmed 0.3 (got to 0.4).
HIREXSR alignment looks good. Getting brightness zero on the top.
Ar level a little low, increase voltage for future data shots

NEXT: run the locked mode calibration shot

Feb 4 2011 08:21:51:880AM 1110204002 Matt Reinke Plasma locked at t~0.66 but probably too much Ar led to an early disruption.

NEXT: reduce Ar to 60 V, disable cryopump and repeat

Feb 4 2011 08:36:58:053AM 1110204003 Matt Reinke Good locked mode shot for HIREXSR calibration.

NEXT: goto low-field, Bt=3.3, Ip=0.6, nl04=0.5-0.3, increase Ar

Feb 4 2011 08:51:49:530AM 1110204004 Matt Reinke Start Bt/Ip/nl04 scan. 3.3/0.6/0.5-0.3

RESULT: most of the flattop, but nl04 scan from 0.5-0.4 only. No density control. Can come back to this later if time and walls looking a little more empty.
BR_UP > BR_LOW

NEXT: same Bt/Ip, nl04=0.5-0.7

Feb 4 2011 09:01:07:957AM 1110204005 Matt Reinke 3.3/0.6/0.5-0.7

RESULT: early disruption, Mo flake

NEXT: repeat

Feb 4 2011 09:18:13:393AM 1110204006 Matt Reinke retry for 3.3/0.6/0.5-0.7

RESULT: "nailed" the density ramp. Getting to a low-Te limit for good HIREXSR data.
Little to no up/down asymmetry

NEXT: increase Ip, goto low density ramp 3.3/0.8/0.6-0.4

Feb 4 2011 09:28:34:580AM 1110204007 Matt Reinke 3.3/0.8/0.6-0.4

RESULT: early disruption, Mo and B. Lots of hards.

NEXT: retry

Feb 4 2011 09:44:52:183AM 1110204008 Matt Reinke retry for 3.3/0.8/0.6-0.4

RESULT: disruption in flattop, possibly q95=3.0, only got nl04 0.6-0.5. Got a rotation reversal.

NEXT: 3.3/0.8/0.6-0.8

Feb 4 2011 09:58:30:327AM 1110204009 Matt Reinke 3.3/0.8/0.6-0.8

RESULT: early disruption due to MARFE. got nl04 ramp from 0.55-0.8. Getting low Ar signal at the end so we've hit the upper bound at this Bt/Ip.

NEXT: goto lower field, need to make up a little time so only go for one 2.7/0.6 shot.

Feb 4 2011 10:12:21:913AM 1110204010 Matt Reinke 2.7/0.6/0.5-0.2, Ar to 70 V

RESULT: early disruption

NEXT: move on, can retry later if we have time. Repeat LM shot, 003.

Feb 4 2011 10:24:50:510AM 1110204011 Matt Reinke repeat LM shot

RESULT: good locked mode shot. velocity drift for z looks to be < 5 km/s

NEXT: do outer gap scan shot for spatial calibration

Feb 4 2011 10:48:51:080AM 1110204012 Matt Reinke outer gap scan

RESULT: early disruption, looks like it might be locked mode. target shot (1101207005) had nl04~0.6 despite the 0.5 target. Looks like we have better density control.

NEXT: increase the target density to 0.6 and repeat

Feb 4 2011 11:22:50:140AM 1110204013 Matt Reinke retry for the outer gap scan shot
(delay for cyropump)

RESULT: good shot, 11 cm gap scan

NEXT: move to high field point, do only nl04 up ramps until cryo is fixed, add impurity injection

Feb 4 2011 11:52:21:367AM 1110204014 Matt Reinke high field 7.5/0.8/0.60-0.85
add Mo LBO at 1.3 seconds.

RESULT: nl04 ramp from 0.5-0.78, disrupts in rampdown. Natural Mo injection at 0.9 and the programmed one at 1.3
BR UP > BR LOW at the start of the nl04 ramp, but reduces as density increases.

NEXT: change Ip, reduce Mo injection and move to flattop

Feb 4 2011 12:10:01:537PM 1110204015 Matt Reinke 7.5/1.0/0.8-1.05
Mo LBO at 0.75,1.1, reduce size to 0.5 of 014 level

RESULT: disruption just after the start of rampdown. Huge natural Mo injection but small LBO's. Doesn't look like the 1.1 second LBO went in. Good density ramp, though (0.6-1.08)

NEXT: repeat but with increased Ar and better Mo LBO's

Feb 4 2011 12:49:52:607PM 1110204016 Matt Reinke repeat shot with better Ar and Mo, 7.5/1.0/0.8-1.05

RESULT: fizzle

NEXT: retry

Feb 4 2011 12:58:31:227PM 1110204017 Matt Reinke 7.5/1.0/0.8-1.05

RESULT: good Ar signal, Mo injections good. nl04=0.6-1.05

NEXT: increase to 1.2 MA, nl04=0.9-1.15

Feb 4 2011 01:40:53:080PM 1110204018 Matt Reinke 7.5/1.2/0.9-1.15
Orso breached before the shot so anything that goes wrong now is his fault

RESULT: good shot, despite orso's attempt to sabotage the run with a breach
nl04=0.75-1.12, got a large natural Mo at 0.6 and a natural Fe at 0.82. Good

NEXT: up to 1.4 MA, nl04=1.0-1.3

Feb 4 2011 01:59:40:260PM 1110204019 Matt Reinke 7.5/1.4/1.0-1.3

RESULT: no power shot, alternator issue

NEXT: retry if alternator is up for it

Feb 4 2011 02:38:41:307PM 1110204020 Matt Reinke going to retry the 2.7 T shot since the alternator is having issues
2.7/0.6/0.4-0.6 changed the density ramp due to no cryo
turn off Mo injections

RESULT: interesting shot. Bt ramp is slow so q is scanning over a large part of the flattop. Still got data, though.
L/H transition at 1.35
Rotation reversal at 0.98 seconds.

NEXT: awaiting alternator prognosis

Feb 4 2011 02:56:59:247PM 1110204021 Matt Reinke need to take a few shots at low-RPM for alternator, get some 5.4 T out of the way
5.4/1.0/0.8-1.0
renable Mo injections
use Ar puffing from 018

RESULT: good shot, nl04=0.6-1.05

NEXT: increase Ip 5.4/1.2/0.95-1.25

Feb 4 2011 03:10:51:617PM 1110204022 Matt Reinke 5.4/1.2/0.95-1.25

RESULT: good shot, nl04=0.7-1.3
another rotation reversal

NEXT: renable cryopump and start density ramps downward

Feb 4 2011 03:26:35:103PM 1110204023 Matt Reinke 5.4/1.2/0.8-0.4

RESULT: good shot, but didn't really get a density scan

NEXT: move back up to 7.5 T while we can

Feb 4 2011 03:36:32:987PM 1110204024 Matt Reinke retry of 019 but w/ the alternator this time
7.5/1.4/1.0-1.3

RESULT: looks like a Mo brick at t~0.255

NEXT: I say retry let's see what the PO thinks...

Feb 4 2011 04:09:11:573PM 1110204025 Matt Reinke retry at 7.5/1.4/1.0-1.3

RESULT: awesome shot! nl04=0.9-1.35
small rotation reversal

NEXT: move to downward scan 7.4/1.4,0.8-0.5

Feb 4 2011 04:36:15:853PM 1110204026 Matt Reinke 7.5/1.4/0.8-0.5

RESULT: good shot but again, not much density. cryo not really working, but that's the SL's fault for the LSN.

NEXT: get the low Ip high field pt

Feb 4 2011 04:52:44:447PM 1110204027 Matt Reinke 7.5/0.6/0.4-0.7

RESULT: alternator problem again

NEXT: I sense a return to lower field

Feb 4 2011 05:09:17:280PM 1110204028 Matt Reinke move to lower field to debug alternator
5.4/0.8/0.4-0.9
re-enable Mo

RESULT: perhaps a bit to fast of a nl04 ramp, but I'll take it!
got a double rotation reversal (what does it mean!)

NEXT: locked mode calibration shot

Feb 4 2011 05:24:43:597PM 1110204029 Matt Reinke locked mode calibration shot

RESULT: good calibration shot, little to no drift

NEXT: lower Ip at 5.4

Feb 4 2011 05:37:58:827PM 1110204030 Matt Reinke 5.4/0.6/0.3-0.6

RESULT: Good shot

NEXT: back to 1.0 MA but lower nl04

Feb 4 2011 05:51:25:867PM 1110204031 Matt Reinke 5.4/1.0/0.4-0.7

RESULT: another fast density ramp.

NEXT: last shot, 7.5/0.6/0.4-0.7

Feb 7 2011 08:57:43:813AM 1110204032 Matt Reinke retry 027 that tha alternator faulted on 7.5/0.6/0.4-0.7

RESULT: got it!

NEXT: last shot, thanks everyone!

Physics Operator Comments

Feb 3 2011 12:53:26:240PM Jerry Hughes Setting up for Friday's run.

Will load a cryopumped startup from Tuesday, since today's current ramps are
retarded. (i.e., delayed)

Load from 1110201035.

Import Seg2 from 1110126013 into Seg2
Import Seg2 from 1101207005 into Seg3
Import Seg4 from 1110128022 into Seg4

Save in /home/jwhughes/physop/pcs_scratch/ as 1110204111.

Adjusting PG1 (Ar) program in Seg2, per SL request: 75V from 0.3 to 0.4s.
Verified that PG1 is set to chop in DPCS_PIEZO_CHOPPER.

Save in /home/jwhughes/physop/pcs_scratch/ as 1110204112.

Feb 3 2011 01:17:28:127PM Jerry Hughes Here are Jim Irby's PO notes from shot 1110107007 (the last ~8T run).

>>Moving to 8T operation
>>
>>TF current limit from 165 to 230 kA
>>TF invert time from 3 to 1.3 s
>>
>>TF fused checked successfully
>>
>>Import 1101217018 into seg 1 (last 8 T operation)
>>prefill to 25 ms
>>Alternator to 1708 RPM
>>PG2 filled with He3 at 15 psi -- pulse from 200 to 300 ms
>>TF to 227 kA in seg 2
>>loaded
>>Open tree done

Before we move on to Matt's part (6), I need to:
0. Have alternator spin up to higher speed.
1. Have power supply settings from 1110107030 loaded. This should include:
.TF current limit to 230 kA (or at least 220)
.Move TF invert time to 1.3s.
2. Have TF fuse checked?
3. Load high-field Seg1 from 1110107030.
4. Adjust pre-fill as needed.
5. Set TF program in Seg2 at 0.1s to the appropriate value.

Feb 4 2011 04:10:22:260AM Jerry Hughes Load from 1110204112 in /home/jwhughes/physop/pcs_scratch/

Load at 4-Feb-2011 04:09:21.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Should be ready to go for shot 1.

Feb 4 2011 08:10:41:193AM 1110204001 Jerry Hughes Shot 1.

Attempt: Baseline discharge for the experiment. 600kA, 5.4T, LSN.

Result: Good shot, vertically unstable at the end, disrupting in rampdown.

Feb 4 2011 08:19:51:720AM 1110204002 Jerry Hughes Shot 2

Attempt: Locked-mode calibration shot
Turn OFF Seg2.
Turn ON Seg4.

Load at 4-Feb-2011 08:14:05.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Disruption at 0.8s. Too much Ar.

Feb 4 2011 08:33:06:630AM 1110204003 Jerry Hughes Shot 3.

Attempt: Retry locked mode calibration
Reduce PG1 chop from 100V to 60V. Keep timing at [0.3,0.6]s.
Turn OFF cryopump
Reduce PG4 pre-fill from 62ms to 25ms.

Load at 4-Feb-2011 08:24:46.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Successful locked mode.

Feb 4 2011 08:48:58:793AM 1110204004 Jerry Hughes Shot 4.

Attempt: Move on with the run plan.
Turn OFF Seg4
Turn ON Seg2
Have cryopump back ON.
Import Seg1 of 1110204001 into Seg1 to recover successful pre-fill.
Set TF in Seg2 to -90800A
Set nl04 to ramp from 5e19 to 3e19 over 0.7 to 1.4s
Increase PG1 chop to 90V.

Load at 4-Feb-2011 08:41:50.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Got 3.4T, 600kA, from about .7s until disruption at 1.44s.

Feb 4 2011 09:06:03:273AM 1110204005 Jerry Hughes Shot 5.

Attempt: Same as previous shot, but scan density up.
Set nl04 in Seg2 to ramp from 0.6e20 to 0.8e20 from 0.7 to 1.4s
Also insert a 4mm ramp down in ZCUR to try to correct for the
drift toward DN that occurs throughout shot.

Load at 4-Feb-2011 08:54:32.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Early disruption, barely gets above 100kA.
SL reports a Mo flake is the culprit.

Feb 4 2011 09:14:11:340AM 1110204006 Jerry Hughes Shot 6.

Attempt: Retry. No changes.

Result: 3.4T, 600kA. Nailed the requested density ramp.

Feb 4 2011 09:32:39:777AM 1110204007 Jerry Hughes Shot 7.

Attempt: 800kA, 0.6e20-->0.4e20 nl04 request from SL.
Set IP in Seg2 to -800000
Set nl04 in Seg2 to [7e19,4e19] from [0.7,1.4]s.

Load at 4-Feb-2011 09:20:06.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Another early disruption. Some runaways.

Feb 4 2011 09:46:06:823AM 1110204008 Jerry Hughes Shot 8.

Attempt: Retry.
Reduce pre-fill from 62ms to 59ms.

Load at 4-Feb-2011 09:35:53.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Density program looks good, but plasma disrupts at 1.1s.
Vertically unstable. kappa is 1.7!

Feb 4 2011 09:58:53:257AM 1110204009 Jerry Hughes Shot 9.

Attempt: 3.4T, 800kA nl04 from 0.6e20 to 0.8e20 per SL request.
Set nl04 in Seg2 to ramp from [0.7e20,0.9e20] from [0.7,1.4]s.
Decreasing ZCUR during flattop by 0.005m, preserving the ramp down that
is programmed.
Also raising ZXU by net 0.005m in the flattop.
Finally, return pre-fill to 62ms, as on shot 7.

Load at 4-Feb-2011 09:51:07.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Startup is much improved, though not through anything I've done.
Got the density ramp. Overfuelled to a disruption, actually.
n/ncrit looks to be more under control.

Feb 4 2011 10:14:11:810AM 1110204010 Jerry Hughes Shot 10.

Attempt: 2.7T, 600kA, nl04 ramping from 0.5e20 to 0.2e20 !!! q95 will be pretty
low.
TF to -72100
PG1 reduced to 70V.
Ip to -600000
nl04 ramping [0.6e20,0.1e20] over [0.7,1.4]s

Load at 4-Feb-2011 10:07:15.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Startup doesn't go well. I think something falls in again, as on 005.
MLR says boron. Increase in carbon/Halpha, followed by a few hards.

Feb 4 2011 10:25:03:503AM 1110204011 Jerry Hughes Shot 11.

Attempt: Locked mode calibration shot.
SL wants to keep cryopump on.
Turn OFF Seg2
Turn ON Seg4

Load at 4-Feb-2011 10:17:02.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Shot ran as programmed. No incidents during startup.

Feb 4 2011 10:46:53:110AM 1110204012 Jerry Hughes Shot 12.

Attempt: outer gap scan.
Turn OFF Seg4
Turn ON Seg3
PG1 set to 80V from 0.4 to 0.5s

Load at 4-Feb-2011 10:28:35.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Disruption at 0.4s, following 2 energy dumps.
Unwanted locked modes

Feb 4 2011 11:23:13:310AM 1110204013 Jerry Hughes Shot 13.

Attempt: repeat with higher density.
Raise nl04 program from 5e19 to 6e19 for duration of shot.

Load at 4-Feb-2011 10:49:33.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Significant delay due to the cryopump fill valve being stuck.
Needs consultation from Brian. Let's proceed without the cryo.
Changing pre-fill to 25ms from 62ms.

Load at 4-Feb-2011 11:15:57.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Good shot, ramps outer gap as programmed. Density control is of course
poor, but that doesn't matter.

Feb 4 2011 11:45:55:687AM 1110204014 Jerry Hughes Shot 14.

Attempt: 7.5T, 800kA, nl04 from 0.6e20 to 0.95e20, per SL request.
Cryopump will be off, until it can be made to work again.

Prep work for the high Bt shot.
Edit Seg2 while it's inactive.
Set TF to -210000. starting at 0.1s, hold until 1.25s, then ramp down by 3s.
Set Ip to -800000. ramping down starting at 1.25s.
Set nl04 demand to ramp [7e19,0.35e19] over [0.5,1.25]s

Load at 4-Feb-2011 11:08:53.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Now activate Seg2 and deactivate Seg3.
Now import Seg1 from 1110107030 into Seg1.
Set TF in Seg1 to -210000.
Pre-fill is 24ms. Should be okay without cryopump on.
Checked that Ip to -800000. ramping down starting at 1.25s.
Set nl04 demand to ramp [6e19,9.5e19] over [0.5,1.25]s

Load at 4-Feb-2011 11:34:30.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Now we're ready.

Result: Disrupts at 1.53s, vertically unstable.
Got a density ramp of 0.5e20 to 0.8e20, which is not exactly what SL was
looking for. He seems generally happy.

Feb 4 2011 12:07:53:840PM 1110204015 Jerry Hughes Shot 15.

Attempt: 7.5T, 1MA, nl04 from 0.8e20 to 1.05e20, per SL request.
Increase Ip in Seg2 to -1000000.
Set nl04 to ramp [0.9e20,1.05e20] from [0.6,1.25]s

Load at 4-Feb-2011 11:52:00.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Put a little nudge in ZXU in the rampdown to try to relax the kappa.

Load at 4-Feb-2011 11:57:47.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Disrupts at beginning of rampdown. The vertical instability seems
to still be there.

Feb 4 2011 12:25:28:163PM 1110204016 Jerry Hughes Shot 16.

Attempt: Repeat with more Ar. Also decrease gaps to try to improve vertical
stability.
Add a 2nd pulse to PG1 from 0.9 to 1.0s, also at 70V.
Also decreasing CLEARIN by 0.003, and make the ramp in CLEARIN negative
(it had been positive, probably a holdover from some gap scan for edge
diagnostics)

Load at 4-Feb-2011 12:20:39.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Fizzle, bounces at 15ms.

Feb 4 2011 12:55:35:523PM 1110204017 Jerry Hughes Shot 17.

Attempt: Retry
Increase PG4 pre-puff from 24ms to 28ms.

Load at 4-Feb-2011 12:27:39.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Shot goes. Gets much farther into rampdown this time: 1.6s @600kA, 6.4T.
Startup still bounces.

Feb 4 2011 01:39:19:460PM 1110204018 Jerry Hughes Shot 18.

Attempt: 7.5T, 1.2MA, nl04 from 0.9e20 to 1.15e20, per SL request
IP in Seg2 to -1.2e6
nl04 in Seg2 to [1e20,1.25e20] at [0.6,1.25]s.
Made another reduction to flattop CLEARIN, set to -0.003, ramping
down after 1.25s.
Increase PG4 pre-fill from 28ms to 30ms.

Load at 4-Feb-2011 13:06:38.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Shot goes to almost 1.7s, gets to <0.6MA, 6T before disrupting.
Density ramp is a little turncated, but SL is happy.

Feb 4 2011 02:00:30:517PM 1110204019 Jerry Hughes Shot 19.

Attempt: 7.5T, 1.4MA. nl04 from 1.0e20 to 1.3e20, per SL request.
IP in Seg2 to -1.4e6
nl04 to [1.1e20,1.4e20] at [0.6,1.25]s
Increase PG4 pre-fill from 30ms to 32ms.

Load at 4-Feb-2011 13:49:18.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Alternator throws an error. Bearing number two. Have to take a no power
shot.

Feb 4 2011 02:36:46:527PM 1110204020 Jerry Hughes Shot 20

Alternator wants to run a shot at 1680RPM, which precludes high-field.
SL says go pick up the 2.7T point from earlier.

Attempt: Reload shot 10, all segs. Program is 2.7T, 0.6MA.
Adjust PG4 pre-fill to 30ms in Seg1.
Set nl04 to [0.5e20,0.7e20] from [0.7,1.4]s

Load at 4-Feb-2011 14:30:43.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Forgot to have TF start and invert times reset! Oops.
Shot went. Funny field behavior, but it went, and there was a decent density
scan. Ohmic H-mode at the end.

Feb 4 2011 02:57:26:040PM 1110204021 Jerry Hughes Shot 21

Attempt: 5.4T, 1MA, nl04 from 0.8e20 to 1.0e20 per SL request.
Import Seg2 from 1110204019 into Seg2.
TF to -150000., extend flattop to 1.6s.
IP to -1e6
nl04 to [0.9e20,1.1e20] at [0.7,1.4]s

Load at 4-Feb-2011 14:48:00.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Plasma into rampdown, 1.8s. Startup lloks ok.

Feb 4 2011 03:10:50:127PM 1110204022 Jerry Hughes Shot 22

Attempt: 5.4T, 1.2MA, nl04 from 0.95e20 to 1.2e20, per SL request.
IP to -1.2e6
nl04 from [1.05e20,1.3e20] at [0.7,1.4]s.

Load at 4-Feb-2011 15:02:16.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Good shot, good density ramp, plasma to 1.78s.

Feb 4 2011 03:28:10:573PM 1110204023 Jerry Hughes Shot 23.

Attempt: Repeat shot with cryopump on and nl04 ramping down from 0.8e20 to 0.4e20
Set NL04 in Seg2 to [0.9e20, 0.4e20] at [0.7,1.4]s.
Set PG4 pre-fill to 62ms, as it was on shot 12.

Load at 4-Feb-2011 15:15:40.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Wait for cryopump.

Result: Plasma well into rampdown. Density is fairly flat unfortunately.
Weird CII bump in startup that seems completely benign.

Feb 4 2011 03:40:07:570PM 1110204024 Jerry Hughes Shot 24.

Alternator vibration issue is for now resolved.

Attempt: retry 019.

Recover power supply settings from 018.
Load shot 019.
Increase PG4 pre-fill to 62ms, since cryo is on now.

Load at 4-Feb-2011 15:31:02.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Disrupts at 0.5s at 1.08MA.

Feb 4 2011 04:24:57:143PM 1110204025 Jerry Hughes Shot 25.

Attempt: Retry.
PG4 pre-fill to 67ms.

Load at 4-Feb-2011 15:52:19.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Plasma to 1.76s. Good density ramp. Startup looks good,
although Wolfe is very unhappy about the poloidal field program.
He says that Seg1 is merely a normal field startup with the TF increased
and started earlier. It has propagated down to me via prior high-Bt runs
going at least as far back as last December.

**Update: smw has revised his statement about the startup. He actually says
it is fine, other than that it has a EF4 setpoint which is too low
relative to our 5.4T startups.

Feb 4 2011 06:17:31:130PM 1110204026 Jerry Hughes Shot 26.

Attempt: 7.5T, 1.4MA, nl04 from 0.8e20 to 0.5e20 per SL request
Set NL04 in Seg2 to 9e19 from 0.5 to 0.7, then drop it abruptly to 5e19.

Load at 4-Feb-2011 16:23:26.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Plasma to 1.92s. Density doesn't come down.

Feb 4 2011 04:53:05:790PM 1110204027 Jerry Hughes Shot 27:

Attempt: 7.5T, 600kA, nl04 from 0.4 to 0.7 per SL request.
IP to -600000 in Seg2
NL04 to [0.4e20,0.8e20] at [0.5,1.25]s

Load at 4-Feb-2011 16:39:25.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Another alternator bearing vibration warning. No power.

Feb 4 2011 05:08:00:870PM 1110204028 Jerry Hughes Shot 28.

Go back to lower field cases until alternator can be spun back up to 1710.

Attempt: 5.4T, 800kA, nl04 from 0.4e20 to 0.9e20

Having power supply settings set to what they were on shot 023.
Load from 1110204023.
IP to -800000 in Seg2
NL04 set at [0.4e20,1.0e20] at [0.7,1.4]s.

Load at 4-Feb-2011 17:02:32.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Clean shot. Good startup. Plasma to 1.87s.
Huge density ramp, although it starts late.

Feb 4 2011 05:23:41:277PM 1110204029 Jerry Hughes Shot 29

Attempt: Locked mode calibration shot.

Turn OFF Seg2
Turn ON Seg4

Load at 4-Feb-2011 17:09:37.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Good locked mode. SL is happy.

Feb 4 2011 05:35:45:420PM 1110204030 Jerry Hughes Shot 30.

Attempt: 600kA, 5.4T, nl04 from 0.3e20 to 0.6e20

Turn OFF Seg4
Turn ON Seg2

IP in Seg2 to -600000
NL04 from [0.4e20,0.7e20] at [0.7,1.4]

Load at 4-Feb-2011 17:29:44.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Good shot. Plasma to 1.88s. Density ramp is suitable.

Feb 4 2011 06:18:41:323PM 1110204031 Jerry Hughes Shot 31.

Attempt: 5.4T, 1.0MA, nl04 from 0.4e20 to 0.7e20
IP to -1e6 in Seg2
NL04 to [0.5e20,0.8e20] at [0.7,1.4]

Load at 4-Feb-2011 17:40:27.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Plasma to 1.92s.

Feb 4 2011 06:02:46:800PM 1110204032 Jerry Hughes Shot 32:

Attempt: Retry shot 27. 7.5T, 600kA

Load from 1110204027

Load at 4-Feb-2011 17:51:53.00
Open tree /home/jwhughes/physop/pcs_scratch -1
Open tree done

Result: Great end to the run. Thanks everyone!

Engineering Operator Comments

Shot Time Type Status Comment

1 08:01:52:440AM Plasma Ok

2 08:14:43:723AM Plasma Ok

3 08:27:52:053AM Plasma Ok

4 08:42:38:743AM Plasma Ok

5 08:55:25:600AM Plasma Ok

6 09:09:43:187AM Plasma Ok

7 09:23:25:513AM Plasma Ok

8 09:36:37:117AM Plasma Ok

9 09:51:57:607AM Plasma Ok

10 10:07:55:057AM Plasma Ok

11 10:20:49:803AM Plasma Ok

12 10:37:32:930AM Plasma Ok

13 11:18:09:837AM Plasma Ok

14 11:35:45:880AM Plasma Ok

15 11:59:01:770AM Plasma Ok

16 12:21:42:147PM Plasma Ok

17 12:44:13:097PM Plasma Ok

18 01:33:55:997PM Plasma Ok

19 01:56:53:157PM Plasma Bad Alternator inhibited Bearing 2 out of spec

20 02:31:48:927PM Plasma Ok

21 02:48:51:930PM Plasma Ok

22 03:03:25:860PM Plasma Ok

23 03:19:33:213PM Plasma Ok

24 03:32:11:077PM Plasma Ok

25 04:00:19:853PM Plasma Ok

26 04:25:52:627PM Plasma Ok

27 04:48:54:953PM Plasma Bad Alternator Vibration Problem - No Power

28 05:03:04:807PM Plasma Ok

29 05:16:36:693PM Plasma Ok

30 05:30:18:487PM Plasma Ok

31 05:43:42:593PM Plasma Ok

32 05:58:00:360PM Plasma Ok

System Availability

Feb 4 2011 08:01:35:843AM

System Available Comment Availability
Changed Owner Description Who Can
Change
Active MHD no secured - tagged out Jun 02 2008 11:03AM (sears) Joe Snipes Active MHD Antenna sears,snipes
BES yes BES system is online Oct 21 2010 11:33AM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan
Bolometers yes 2pi (D+F) working. All midplane and off-midplane diode arrays working except WB1AX. Midplane foils calibrated and PRAD_MAIN is being filled. Divertor/Ledge foils not yet ready. Jul 15 2010 08:27AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization yes Nov 16 2010 02:36PM (dekow) Jim Irby Boronization dekow,irby
CNPA yes Multiple channel CNPA available Oct 21 2010 07:11PM (parker) Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor no Shut down. Helium dewar removed. LN2 manual valve and solenoid valves are closed and tagged. Apr 06 2010 10:51AM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard
CXRS yes Wide-view CXRS system is online Oct 21 2010 11:33AM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan
D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 01 2009 09:45AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe
Dalsa yes system is aligned; new calibrations (relative brightness and position) not yet implemented Jun 29 2010 10:27AM (marmar) Earl Marmar Visible Bremsstrahlung marmar
Disruption Mitigation yes operational, but turned off Nov 03 2009 04:59PM (granetz) Robert Granetz Gas Jet granetz,whyte
Divertor IR no Mar 06 2007 10:50AM Glen Wurden Divertor IR Digital Video gwurden,terry
Divertor IR Spectroscopy no Mar 06 2007 10:51AM Glen Wurden Divertor IR Spectroscopy gwurden,terry
DNB no in test mode only Nov 03 2009 05:01PM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,gung
ECDC yes Operational Jun 26 2010 09:28PM (irby) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer
FRC-ECE yes All channels working and calibrated. Oct 27 2010 03:41PM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips
G-Side Ratiomatic yes Gauges are operational. Jun 28 2010 08:02PM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
Glow Discharge no Plugs for Power Supply and Controls have been unplugged and red tagged making system safe for In-Vessel Access. Apr 05 2010 11:18AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby
GPC yes Operational. Jul 28 2009 04:23PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPC2 yes Most channels operational. Oct 22 2010 11:46AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 01 2009 09:45AM (terry) Jim Terry Gas Puff Imaging terry,zweben
H/D yes operating normally Jun 29 2010 10:26AM (marmar) Earl Marmar H/D Ratio marmar
HEAT yes Jun 26 2010 11:19PM (dekow) Gary Dekow - Machine Heaters - burke,dekow
Hirex Jr yes Hirex-Jr has been installed Jun 28 2010 03:36PM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr yes System installed and aligned. Inverted Profiles for Ti are available upon request. Vtor profiles still under revision. Dec 17 2010 09:25AM (ypodpaly) John Rice High Resolution X-Ray ince,rice,ypodpaly
HXR yes 32 Channels operational Oct 23 2010 01:41PM (parker) Ron Parker Hard X-Ray Array faust,parker,schmidt
ICRF D-Antenna yes system checked out ok on 11006728. Jun 28 2010 04:57PM (ylin) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes system checked out ok on 1100628 Jun 28 2010 04:57PM (ylin) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes system checked out ok. conditioned to vacuum. Jun 28 2010 04:58PM (ylin) Steve Wukitch J-port antenna wukitch,ylin
Laser Blow-Off yes operational and tested Jul 20 2010 04:42PM (g) Martin Greenwald Impurity Injection System g,nthoward
Lower Hybrid yes LH working. New directional couplers installed at input to each klystron. Oct 21 2010 11:42AM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg
Lower Hybrid Reflectometer yes 50GHz: up-, 60 GHz up- and down- Oct 21 2010 11:31AM (sgbaek) Arturo Dominguez Lower Hybrid Reflectometer dominguez,marmar,parker,sgbaek
Lower Hybrid SOL reflectometer yes profiles and fluctuations both working. If requested, please request LH launcher to be moved in. Jan 18 2011 03:07PM (cornwall) Cornwall Lau Lower Hybrid SOL reflectometer cornwall,wukitch,ylin
LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha no WB4LY and LLY working but not during ICRF. WB1LY not attached due to pickup problems. LYMID attached but have profile problems. Aug 24 2010 09:17AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke
McPherson yes Spectra being collected and tree filled. Wavelength scan is broken so fixed on the Mo XXXI and XXXII lines. Jul 15 2010 08:28AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Operational. Oct 22 2010 11:46AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes Gauges are operational Jun 28 2010 08:02PM (labombard) Brian LaBombard Baratron pressure gauges labombard
MLP no System is in edge lab. Version 2 drivers ready to test. Needs a student to help work on it. Jul 14 2009 09:20PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard
MSE no As of 6/10/09, MSE is calibrated & ready to go. Awaiting DNB. Jun 10 2009 10:34AM (sscott) Steve Scott Motional Stark Effect jinseok,sscott
Neutrons yes All systems are on and functional Jun 29 2010 12:56PM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes PMT Neuts_hards, ssd_x01, ssd_x02, ssd_x03 Jun 26 2010 09:21PM (irby) Jim Irby X-Ray/Neutron Detectors at K-Hor irby
NINJA no Capillaries tested in-vessel. Jun 28 2010 08:08PM (labombard) Brian LaBombard NINJA gas puff labombard,terry
PCI yes Operational. AM (2 * 39.51) MHz. Dec 13 2010 05:29PM (ntsujii) Miklos Porkolab Phase Contrast Imaging ennever,ntsujii,porkolab
Penning Gauges no High voltage power supplies are turned off, waiting for work at A-port horizontal to be finished. Jun 28 2010 08:07PM (labombard) Brian LaBombard Penning Ionization Gauges labombard
Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Jul 01 2009 09:46AM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe
Polarimeter no Safe for Machine Entry Sep 14 2007 12:17PM (irby) Jim Irby C-Mod Polarimeter irby
Power - Alternator Air Switch yes Jun 26 2010 11:19PM (dekow) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby
Power - PEI yes Jun 26 2010 11:19PM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby
Power - TMX yes Jun 26 2010 11:19PM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby
Power Systems yes Jun 26 2010 11:20PM (dekow) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby
Probe Array - ISD yes Operational. Jun 28 2010 08:03PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH yes Operational. Jun 28 2010 08:03PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes F and J outer divertor probes are operational. Jun 28 2010 08:04PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard
Probe Array - UDIV yes Operational, except probe#13 Jun 28 2010 08:04PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes As of 1101123, the 60, 88u, 88l, 140 and variable set at 115GHz are operational. The 50, 75 and 112 are nonoperational. On 1101123, the noise band at ~200kHz is again seen on the 88u and 88l channels. Nov 23 2010 09:30AM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Operational. New Langmuir-Mach probe head installed. Jun 28 2010 08:05PM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes Operational. Jun 28 2010 08:05PM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP yes Both A and K units are operational. Coil polarity needs to be checked. Jun 28 2010 08:06PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
Sparker yes HV supply on, cable run to sparker at k-hor Jun 23 2010 02:41PM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin
Surface Science Station yes SSS installed and leak tested. Oct 21 2010 11:31AM (ochoukov) Bruce Lipschultz Radially scanning probe located on K-port blip,ochoukov
TCI yes No new CO2 detector, so still missing edge channels Jun 23 2010 02:40PM (irby) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes Operating with 2 lasers Oct 22 2010 01:06PM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma
TS - Edge yes Operational Jul 14 2010 11:54AM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma
Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf
XEUS yes Raw spectra stored but not line brightness time histories are going into the tree yet. Jan 20 2011 10:45AM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer mlreinke
XTOMO yes Core system working. Edge system waiting for H-modes. Jul 01 2010 11:55AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke

Session Leader Comments
Feb 4 2011 08:15:31:107AM	1110204001	Matt Reinke	got through flattop, density ramp down didn't quite make it to programmed 0.3 (got to 0.4). HIREXSR alignment looks good. Getting brightness zero on the top. Ar level a little low, increase voltage for future data shots NEXT: run the locked mode calibration shot
Feb 4 2011 08:21:51:880AM	1110204002	Matt Reinke	Plasma locked at t~0.66 but probably too much Ar led to an early disruption. NEXT: reduce Ar to 60 V, disable cryopump and repeat
Feb 4 2011 08:36:58:053AM	1110204003	Matt Reinke	Good locked mode shot for HIREXSR calibration. NEXT: goto low-field, Bt=3.3, Ip=0.6, nl04=0.5-0.3, increase Ar
Feb 4 2011 08:51:49:530AM	1110204004	Matt Reinke	Start Bt/Ip/nl04 scan. 3.3/0.6/0.5-0.3 RESULT: most of the flattop, but nl04 scan from 0.5-0.4 only. No density control. Can come back to this later if time and walls looking a little more empty. BR_UP > BR_LOW NEXT: same Bt/Ip, nl04=0.5-0.7
Feb 4 2011 09:01:07:957AM	1110204005	Matt Reinke	3.3/0.6/0.5-0.7 RESULT: early disruption, Mo flake NEXT: repeat
Feb 4 2011 09:18:13:393AM	1110204006	Matt Reinke	retry for 3.3/0.6/0.5-0.7 RESULT: "nailed" the density ramp. Getting to a low-Te limit for good HIREXSR data. Little to no up/down asymmetry NEXT: increase Ip, goto low density ramp 3.3/0.8/0.6-0.4
Feb 4 2011 09:28:34:580AM	1110204007	Matt Reinke	3.3/0.8/0.6-0.4 RESULT: early disruption, Mo and B. Lots of hards. NEXT: retry
Feb 4 2011 09:44:52:183AM	1110204008	Matt Reinke	retry for 3.3/0.8/0.6-0.4 RESULT: disruption in flattop, possibly q95=3.0, only got nl04 0.6-0.5. Got a rotation reversal. NEXT: 3.3/0.8/0.6-0.8
Feb 4 2011 09:58:30:327AM	1110204009	Matt Reinke	3.3/0.8/0.6-0.8 RESULT: early disruption due to MARFE. got nl04 ramp from 0.55-0.8. Getting low Ar signal at the end so we've hit the upper bound at this Bt/Ip. NEXT: goto lower field, need to make up a little time so only go for one 2.7/0.6 shot.
Feb 4 2011 10:12:21:913AM	1110204010	Matt Reinke	2.7/0.6/0.5-0.2, Ar to 70 V RESULT: early disruption NEXT: move on, can retry later if we have time. Repeat LM shot, 003.
Feb 4 2011 10:24:50:510AM	1110204011	Matt Reinke	repeat LM shot RESULT: good locked mode shot. velocity drift for z looks to be < 5 km/s NEXT: do outer gap scan shot for spatial calibration
Feb 4 2011 10:48:51:080AM	1110204012	Matt Reinke	outer gap scan RESULT: early disruption, looks like it might be locked mode. target shot (1101207005) had nl04~0.6 despite the 0.5 target. Looks like we have better density control. NEXT: increase the target density to 0.6 and repeat
Feb 4 2011 11:22:50:140AM	1110204013	Matt Reinke	retry for the outer gap scan shot (delay for cyropump) RESULT: good shot, 11 cm gap scan NEXT: move to high field point, do only nl04 up ramps until cryo is fixed, add impurity injection
Feb 4 2011 11:52:21:367AM	1110204014	Matt Reinke	high field 7.5/0.8/0.60-0.85 add Mo LBO at 1.3 seconds. RESULT: nl04 ramp from 0.5-0.78, disrupts in rampdown. Natural Mo injection at 0.9 and the programmed one at 1.3 BR UP > BR LOW at the start of the nl04 ramp, but reduces as density increases. NEXT: change Ip, reduce Mo injection and move to flattop
Feb 4 2011 12:10:01:537PM	1110204015	Matt Reinke	7.5/1.0/0.8-1.05 Mo LBO at 0.75,1.1, reduce size to 0.5 of 014 level RESULT: disruption just after the start of rampdown. Huge natural Mo injection but small LBO's. Doesn't look like the 1.1 second LBO went in. Good density ramp, though (0.6-1.08) NEXT: repeat but with increased Ar and better Mo LBO's
Feb 4 2011 12:49:52:607PM	1110204016	Matt Reinke	repeat shot with better Ar and Mo, 7.5/1.0/0.8-1.05 RESULT: fizzle NEXT: retry
Feb 4 2011 12:58:31:227PM	1110204017	Matt Reinke	7.5/1.0/0.8-1.05 RESULT: good Ar signal, Mo injections good. nl04=0.6-1.05 NEXT: increase to 1.2 MA, nl04=0.9-1.15
Feb 4 2011 01:40:53:080PM	1110204018	Matt Reinke	7.5/1.2/0.9-1.15 Orso breached before the shot so anything that goes wrong now is his fault RESULT: good shot, despite orso's attempt to sabotage the run with a breach nl04=0.75-1.12, got a large natural Mo at 0.6 and a natural Fe at 0.82. Good NEXT: up to 1.4 MA, nl04=1.0-1.3
Feb 4 2011 01:59:40:260PM	1110204019	Matt Reinke	7.5/1.4/1.0-1.3 RESULT: no power shot, alternator issue NEXT: retry if alternator is up for it
Feb 4 2011 02:38:41:307PM	1110204020	Matt Reinke	going to retry the 2.7 T shot since the alternator is having issues 2.7/0.6/0.4-0.6 changed the density ramp due to no cryo turn off Mo injections RESULT: interesting shot. Bt ramp is slow so q is scanning over a large part of the flattop. Still got data, though. L/H transition at 1.35 Rotation reversal at 0.98 seconds. NEXT: awaiting alternator prognosis
Feb 4 2011 02:56:59:247PM	1110204021	Matt Reinke	need to take a few shots at low-RPM for alternator, get some 5.4 T out of the way 5.4/1.0/0.8-1.0 renable Mo injections use Ar puffing from 018 RESULT: good shot, nl04=0.6-1.05 NEXT: increase Ip 5.4/1.2/0.95-1.25
Feb 4 2011 03:10:51:617PM	1110204022	Matt Reinke	5.4/1.2/0.95-1.25 RESULT: good shot, nl04=0.7-1.3 another rotation reversal NEXT: renable cryopump and start density ramps downward
Feb 4 2011 03:26:35:103PM	1110204023	Matt Reinke	5.4/1.2/0.8-0.4 RESULT: good shot, but didn't really get a density scan NEXT: move back up to 7.5 T while we can
Feb 4 2011 03:36:32:987PM	1110204024	Matt Reinke	retry of 019 but w/ the alternator this time 7.5/1.4/1.0-1.3 RESULT: looks like a Mo brick at t~0.255 NEXT: I say retry let's see what the PO thinks...
Feb 4 2011 04:09:11:573PM	1110204025	Matt Reinke	retry at 7.5/1.4/1.0-1.3 RESULT: awesome shot! nl04=0.9-1.35 small rotation reversal NEXT: move to downward scan 7.4/1.4,0.8-0.5
Feb 4 2011 04:36:15:853PM	1110204026	Matt Reinke	7.5/1.4/0.8-0.5 RESULT: good shot but again, not much density. cryo not really working, but that's the SL's fault for the LSN. NEXT: get the low Ip high field pt
Feb 4 2011 04:52:44:447PM	1110204027	Matt Reinke	7.5/0.6/0.4-0.7 RESULT: alternator problem again NEXT: I sense a return to lower field
Feb 4 2011 05:09:17:280PM	1110204028	Matt Reinke	move to lower field to debug alternator 5.4/0.8/0.4-0.9 re-enable Mo RESULT: perhaps a bit to fast of a nl04 ramp, but I'll take it! got a double rotation reversal (what does it mean!) NEXT: locked mode calibration shot
Feb 4 2011 05:24:43:597PM	1110204029	Matt Reinke	locked mode calibration shot RESULT: good calibration shot, little to no drift NEXT: lower Ip at 5.4
Feb 4 2011 05:37:58:827PM	1110204030	Matt Reinke	5.4/0.6/0.3-0.6 RESULT: Good shot NEXT: back to 1.0 MA but lower nl04
Feb 4 2011 05:51:25:867PM	1110204031	Matt Reinke	5.4/1.0/0.4-0.7 RESULT: another fast density ramp. NEXT: last shot, 7.5/0.6/0.4-0.7
Feb 7 2011 08:57:43:813AM	1110204032	Matt Reinke	retry 027 that tha alternator faulted on 7.5/0.6/0.4-0.7 RESULT: got it! NEXT: last shot, thanks everyone!

Physics Operator Comments
Feb 3 2011 12:53:26:240PM		Jerry Hughes	Setting up for Friday's run. Will load a cryopumped startup from Tuesday, since today's current ramps are retarded. (i.e., delayed) Load from 1110201035. Import Seg2 from 1110126013 into Seg2 Import Seg2 from 1101207005 into Seg3 Import Seg4 from 1110128022 into Seg4 Save in /home/jwhughes/physop/pcs_scratch/ as 1110204111. Adjusting PG1 (Ar) program in Seg2, per SL request: 75V from 0.3 to 0.4s. Verified that PG1 is set to chop in DPCS_PIEZO_CHOPPER. Save in /home/jwhughes/physop/pcs_scratch/ as 1110204112.
Feb 3 2011 01:17:28:127PM		Jerry Hughes	Here are Jim Irby's PO notes from shot 1110107007 (the last ~8T run). >>Moving to 8T operation >> >>TF current limit from 165 to 230 kA >>TF invert time from 3 to 1.3 s >> >>TF fused checked successfully >> >>Import 1101217018 into seg 1 (last 8 T operation) >>prefill to 25 ms >>Alternator to 1708 RPM >>PG2 filled with He3 at 15 psi -- pulse from 200 to 300 ms >>TF to 227 kA in seg 2 >>loaded >>Open tree done Before we move on to Matt's part (6), I need to: 0. Have alternator spin up to higher speed. 1. Have power supply settings from 1110107030 loaded. This should include: .TF current limit to 230 kA (or at least 220) .Move TF invert time to 1.3s. 2. Have TF fuse checked? 3. Load high-field Seg1 from 1110107030. 4. Adjust pre-fill as needed. 5. Set TF program in Seg2 at 0.1s to the appropriate value.
Feb 4 2011 04:10:22:260AM		Jerry Hughes	Load from 1110204112 in /home/jwhughes/physop/pcs_scratch/ Load at 4-Feb-2011 04:09:21.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Should be ready to go for shot 1.
Feb 4 2011 08:10:41:193AM	1110204001	Jerry Hughes	Shot 1. Attempt: Baseline discharge for the experiment. 600kA, 5.4T, LSN. Result: Good shot, vertically unstable at the end, disrupting in rampdown.
Feb 4 2011 08:19:51:720AM	1110204002	Jerry Hughes	Shot 2 Attempt: Locked-mode calibration shot Turn OFF Seg2. Turn ON Seg4. Load at 4-Feb-2011 08:14:05.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Disruption at 0.8s. Too much Ar.
Feb 4 2011 08:33:06:630AM	1110204003	Jerry Hughes	Shot 3. Attempt: Retry locked mode calibration Reduce PG1 chop from 100V to 60V. Keep timing at [0.3,0.6]s. Turn OFF cryopump Reduce PG4 pre-fill from 62ms to 25ms. Load at 4-Feb-2011 08:24:46.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Successful locked mode.
Feb 4 2011 08:48:58:793AM	1110204004	Jerry Hughes	Shot 4. Attempt: Move on with the run plan. Turn OFF Seg4 Turn ON Seg2 Have cryopump back ON. Import Seg1 of 1110204001 into Seg1 to recover successful pre-fill. Set TF in Seg2 to -90800A Set nl04 to ramp from 5e19 to 3e19 over 0.7 to 1.4s Increase PG1 chop to 90V. Load at 4-Feb-2011 08:41:50.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Got 3.4T, 600kA, from about .7s until disruption at 1.44s.
Feb 4 2011 09:06:03:273AM	1110204005	Jerry Hughes	Shot 5. Attempt: Same as previous shot, but scan density up. Set nl04 in Seg2 to ramp from 0.6e20 to 0.8e20 from 0.7 to 1.4s Also insert a 4mm ramp down in ZCUR to try to correct for the drift toward DN that occurs throughout shot. Load at 4-Feb-2011 08:54:32.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Early disruption, barely gets above 100kA. SL reports a Mo flake is the culprit.
Feb 4 2011 09:14:11:340AM	1110204006	Jerry Hughes	Shot 6. Attempt: Retry. No changes. Result: 3.4T, 600kA. Nailed the requested density ramp.
Feb 4 2011 09:32:39:777AM	1110204007	Jerry Hughes	Shot 7. Attempt: 800kA, 0.6e20-->0.4e20 nl04 request from SL. Set IP in Seg2 to -800000 Set nl04 in Seg2 to [7e19,4e19] from [0.7,1.4]s. Load at 4-Feb-2011 09:20:06.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Another early disruption. Some runaways.
Feb 4 2011 09:46:06:823AM	1110204008	Jerry Hughes	Shot 8. Attempt: Retry. Reduce pre-fill from 62ms to 59ms. Load at 4-Feb-2011 09:35:53.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Density program looks good, but plasma disrupts at 1.1s. Vertically unstable. kappa is 1.7!
Feb 4 2011 09:58:53:257AM	1110204009	Jerry Hughes	Shot 9. Attempt: 3.4T, 800kA nl04 from 0.6e20 to 0.8e20 per SL request. Set nl04 in Seg2 to ramp from [0.7e20,0.9e20] from [0.7,1.4]s. Decreasing ZCUR during flattop by 0.005m, preserving the ramp down that is programmed. Also raising ZXU by net 0.005m in the flattop. Finally, return pre-fill to 62ms, as on shot 7. Load at 4-Feb-2011 09:51:07.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Startup is much improved, though not through anything I've done. Got the density ramp. Overfuelled to a disruption, actually. n/ncrit looks to be more under control.
Feb 4 2011 10:14:11:810AM	1110204010	Jerry Hughes	Shot 10. Attempt: 2.7T, 600kA, nl04 ramping from 0.5e20 to 0.2e20 !!! q95 will be pretty low. TF to -72100 PG1 reduced to 70V. Ip to -600000 nl04 ramping [0.6e20,0.1e20] over [0.7,1.4]s Load at 4-Feb-2011 10:07:15.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Startup doesn't go well. I think something falls in again, as on 005. MLR says boron. Increase in carbon/Halpha, followed by a few hards.
Feb 4 2011 10:25:03:503AM	1110204011	Jerry Hughes	Shot 11. Attempt: Locked mode calibration shot. SL wants to keep cryopump on. Turn OFF Seg2 Turn ON Seg4 Load at 4-Feb-2011 10:17:02.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Shot ran as programmed. No incidents during startup.
Feb 4 2011 10:46:53:110AM	1110204012	Jerry Hughes	Shot 12. Attempt: outer gap scan. Turn OFF Seg4 Turn ON Seg3 PG1 set to 80V from 0.4 to 0.5s Load at 4-Feb-2011 10:28:35.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Disruption at 0.4s, following 2 energy dumps. Unwanted locked modes
Feb 4 2011 11:23:13:310AM	1110204013	Jerry Hughes	Shot 13. Attempt: repeat with higher density. Raise nl04 program from 5e19 to 6e19 for duration of shot. Load at 4-Feb-2011 10:49:33.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Significant delay due to the cryopump fill valve being stuck. Needs consultation from Brian. Let's proceed without the cryo. Changing pre-fill to 25ms from 62ms. Load at 4-Feb-2011 11:15:57.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Good shot, ramps outer gap as programmed. Density control is of course poor, but that doesn't matter.
Feb 4 2011 11:45:55:687AM	1110204014	Jerry Hughes	Shot 14. Attempt: 7.5T, 800kA, nl04 from 0.6e20 to 0.95e20, per SL request. Cryopump will be off, until it can be made to work again. Prep work for the high Bt shot. Edit Seg2 while it's inactive. Set TF to -210000. starting at 0.1s, hold until 1.25s, then ramp down by 3s. Set Ip to -800000. ramping down starting at 1.25s. Set nl04 demand to ramp [7e19,0.35e19] over [0.5,1.25]s Load at 4-Feb-2011 11:08:53.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Now activate Seg2 and deactivate Seg3. Now import Seg1 from 1110107030 into Seg1. Set TF in Seg1 to -210000. Pre-fill is 24ms. Should be okay without cryopump on. Checked that Ip to -800000. ramping down starting at 1.25s. Set nl04 demand to ramp [6e19,9.5e19] over [0.5,1.25]s Load at 4-Feb-2011 11:34:30.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Now we're ready. Result: Disrupts at 1.53s, vertically unstable. Got a density ramp of 0.5e20 to 0.8e20, which is not exactly what SL was looking for. He seems generally happy.
Feb 4 2011 12:07:53:840PM	1110204015	Jerry Hughes	Shot 15. Attempt: 7.5T, 1MA, nl04 from 0.8e20 to 1.05e20, per SL request. Increase Ip in Seg2 to -1000000. Set nl04 to ramp [0.9e20,1.05e20] from [0.6,1.25]s Load at 4-Feb-2011 11:52:00.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Put a little nudge in ZXU in the rampdown to try to relax the kappa. Load at 4-Feb-2011 11:57:47.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Disrupts at beginning of rampdown. The vertical instability seems to still be there.
Feb 4 2011 12:25:28:163PM	1110204016	Jerry Hughes	Shot 16. Attempt: Repeat with more Ar. Also decrease gaps to try to improve vertical stability. Add a 2nd pulse to PG1 from 0.9 to 1.0s, also at 70V. Also decreasing CLEARIN by 0.003, and make the ramp in CLEARIN negative (it had been positive, probably a holdover from some gap scan for edge diagnostics) Load at 4-Feb-2011 12:20:39.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Fizzle, bounces at 15ms.
Feb 4 2011 12:55:35:523PM	1110204017	Jerry Hughes	Shot 17. Attempt: Retry Increase PG4 pre-puff from 24ms to 28ms. Load at 4-Feb-2011 12:27:39.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Shot goes. Gets much farther into rampdown this time: 1.6s @600kA, 6.4T. Startup still bounces.
Feb 4 2011 01:39:19:460PM	1110204018	Jerry Hughes	Shot 18. Attempt: 7.5T, 1.2MA, nl04 from 0.9e20 to 1.15e20, per SL request IP in Seg2 to -1.2e6 nl04 in Seg2 to [1e20,1.25e20] at [0.6,1.25]s. Made another reduction to flattop CLEARIN, set to -0.003, ramping down after 1.25s. Increase PG4 pre-fill from 28ms to 30ms. Load at 4-Feb-2011 13:06:38.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Shot goes to almost 1.7s, gets to <0.6MA, 6T before disrupting. Density ramp is a little turncated, but SL is happy.
Feb 4 2011 02:00:30:517PM	1110204019	Jerry Hughes	Shot 19. Attempt: 7.5T, 1.4MA. nl04 from 1.0e20 to 1.3e20, per SL request. IP in Seg2 to -1.4e6 nl04 to [1.1e20,1.4e20] at [0.6,1.25]s Increase PG4 pre-fill from 30ms to 32ms. Load at 4-Feb-2011 13:49:18.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Alternator throws an error. Bearing number two. Have to take a no power shot.
Feb 4 2011 02:36:46:527PM	1110204020	Jerry Hughes	Shot 20 Alternator wants to run a shot at 1680RPM, which precludes high-field. SL says go pick up the 2.7T point from earlier. Attempt: Reload shot 10, all segs. Program is 2.7T, 0.6MA. Adjust PG4 pre-fill to 30ms in Seg1. Set nl04 to [0.5e20,0.7e20] from [0.7,1.4]s Load at 4-Feb-2011 14:30:43.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Forgot to have TF start and invert times reset! Oops. Shot went. Funny field behavior, but it went, and there was a decent density scan. Ohmic H-mode at the end.
Feb 4 2011 02:57:26:040PM	1110204021	Jerry Hughes	Shot 21 Attempt: 5.4T, 1MA, nl04 from 0.8e20 to 1.0e20 per SL request. Import Seg2 from 1110204019 into Seg2. TF to -150000., extend flattop to 1.6s. IP to -1e6 nl04 to [0.9e20,1.1e20] at [0.7,1.4]s Load at 4-Feb-2011 14:48:00.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma into rampdown, 1.8s. Startup lloks ok.
Feb 4 2011 03:10:50:127PM	1110204022	Jerry Hughes	Shot 22 Attempt: 5.4T, 1.2MA, nl04 from 0.95e20 to 1.2e20, per SL request. IP to -1.2e6 nl04 from [1.05e20,1.3e20] at [0.7,1.4]s. Load at 4-Feb-2011 15:02:16.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Good shot, good density ramp, plasma to 1.78s.
Feb 4 2011 03:28:10:573PM	1110204023	Jerry Hughes	Shot 23. Attempt: Repeat shot with cryopump on and nl04 ramping down from 0.8e20 to 0.4e20 Set NL04 in Seg2 to [0.9e20, 0.4e20] at [0.7,1.4]s. Set PG4 pre-fill to 62ms, as it was on shot 12. Load at 4-Feb-2011 15:15:40.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Wait for cryopump. Result: Plasma well into rampdown. Density is fairly flat unfortunately. Weird CII bump in startup that seems completely benign.
Feb 4 2011 03:40:07:570PM	1110204024	Jerry Hughes	Shot 24. Alternator vibration issue is for now resolved. Attempt: retry 019. Recover power supply settings from 018. Load shot 019. Increase PG4 pre-fill to 62ms, since cryo is on now. Load at 4-Feb-2011 15:31:02.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Disrupts at 0.5s at 1.08MA.
Feb 4 2011 04:24:57:143PM	1110204025	Jerry Hughes	Shot 25. Attempt: Retry. PG4 pre-fill to 67ms. Load at 4-Feb-2011 15:52:19.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.76s. Good density ramp. Startup looks good, although Wolfe is very unhappy about the poloidal field program. He says that Seg1 is merely a normal field startup with the TF increased and started earlier. It has propagated down to me via prior high-Bt runs going at least as far back as last December. **Update: smw has revised his statement about the startup. He actually says it is fine, other than that it has a EF4 setpoint which is too low relative to our 5.4T startups.
Feb 4 2011 06:17:31:130PM	1110204026	Jerry Hughes	Shot 26. Attempt: 7.5T, 1.4MA, nl04 from 0.8e20 to 0.5e20 per SL request Set NL04 in Seg2 to 9e19 from 0.5 to 0.7, then drop it abruptly to 5e19. Load at 4-Feb-2011 16:23:26.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.92s. Density doesn't come down.
Feb 4 2011 04:53:05:790PM	1110204027	Jerry Hughes	Shot 27: Attempt: 7.5T, 600kA, nl04 from 0.4 to 0.7 per SL request. IP to -600000 in Seg2 NL04 to [0.4e20,0.8e20] at [0.5,1.25]s Load at 4-Feb-2011 16:39:25.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Another alternator bearing vibration warning. No power.
Feb 4 2011 05:08:00:870PM	1110204028	Jerry Hughes	Shot 28. Go back to lower field cases until alternator can be spun back up to 1710. Attempt: 5.4T, 800kA, nl04 from 0.4e20 to 0.9e20 Having power supply settings set to what they were on shot 023. Load from 1110204023. IP to -800000 in Seg2 NL04 set at [0.4e20,1.0e20] at [0.7,1.4]s. Load at 4-Feb-2011 17:02:32.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Clean shot. Good startup. Plasma to 1.87s. Huge density ramp, although it starts late.
Feb 4 2011 05:23:41:277PM	1110204029	Jerry Hughes	Shot 29 Attempt: Locked mode calibration shot. Turn OFF Seg2 Turn ON Seg4 Load at 4-Feb-2011 17:09:37.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Good locked mode. SL is happy.
Feb 4 2011 05:35:45:420PM	1110204030	Jerry Hughes	Shot 30. Attempt: 600kA, 5.4T, nl04 from 0.3e20 to 0.6e20 Turn OFF Seg4 Turn ON Seg2 IP in Seg2 to -600000 NL04 from [0.4e20,0.7e20] at [0.7,1.4] Load at 4-Feb-2011 17:29:44.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Good shot. Plasma to 1.88s. Density ramp is suitable.
Feb 4 2011 06:18:41:323PM	1110204031	Jerry Hughes	Shot 31. Attempt: 5.4T, 1.0MA, nl04 from 0.4e20 to 0.7e20 IP to -1e6 in Seg2 NL04 to [0.5e20,0.8e20] at [0.7,1.4] Load at 4-Feb-2011 17:40:27.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Plasma to 1.92s.
Feb 4 2011 06:02:46:800PM	1110204032	Jerry Hughes	Shot 32: Attempt: Retry shot 27. 7.5T, 600kA Load from 1110204027 Load at 4-Feb-2011 17:51:53.00 Open tree /home/jwhughes/physop/pcs_scratch -1 Open tree done Result: Great end to the run. Thanks everyone!

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:01:52:440AM	Plasma	Ok
2	08:14:43:723AM	Plasma	Ok
3	08:27:52:053AM	Plasma	Ok
4	08:42:38:743AM	Plasma	Ok
5	08:55:25:600AM	Plasma	Ok
6	09:09:43:187AM	Plasma	Ok
7	09:23:25:513AM	Plasma	Ok
8	09:36:37:117AM	Plasma	Ok
9	09:51:57:607AM	Plasma	Ok
10	10:07:55:057AM	Plasma	Ok
11	10:20:49:803AM	Plasma	Ok
12	10:37:32:930AM	Plasma	Ok
13	11:18:09:837AM	Plasma	Ok
14	11:35:45:880AM	Plasma	Ok
15	11:59:01:770AM	Plasma	Ok
16	12:21:42:147PM	Plasma	Ok
17	12:44:13:097PM	Plasma	Ok
18	01:33:55:997PM	Plasma	Ok
19	01:56:53:157PM	Plasma	Bad	Alternator inhibited Bearing 2 out of spec
20	02:31:48:927PM	Plasma	Ok
21	02:48:51:930PM	Plasma	Ok
22	03:03:25:860PM	Plasma	Ok
23	03:19:33:213PM	Plasma	Ok
24	03:32:11:077PM	Plasma	Ok
25	04:00:19:853PM	Plasma	Ok
26	04:25:52:627PM	Plasma	Ok
27	04:48:54:953PM	Plasma	Bad	Alternator Vibration Problem - No Power
28	05:03:04:807PM	Plasma	Ok
29	05:16:36:693PM	Plasma	Ok
30	05:30:18:487PM	Plasma	Ok
31	05:43:42:593PM	Plasma	Ok
32	05:58:00:360PM	Plasma	Ok