Alcator C-Mod Run 1080320 Information

Miniproposals

Miniproposal: 515

Date Filed: 7/27/2007

Title: Effect of launched LH wave nll spectrum on current profile

First Author: Ron Parker

Session Leader: Ron Parker (shots 1-33)

Operators
Session leader(s):	Ron Parker
Physics operator(s):	Jim Irby,Earl Marmar
Engineering operator(s):	Andy Pfeiffer,Bill Cochran,Gary Dekow

Engineering Operator Run Comment
MP:515 Effect of launched n-parallel spectrum on current profile Session

Session Leader Plans

Entered: Mar 18 2008 06:12:55:030PM

Author: Ron Parker

Session Leader Plan for 1080320

------------------------------------

MP:515 Effect of launched nll spectrum on current profile

Session Leader: R. Parker
Physop: E. Marmar

Goal: Make clear measurements of LH driven current using MSE, and examine effect of parallel index of refraction on current profile.

Approach: Set-up reproducible, low density discharge and optimize coupling so as to enable high power (~ 1 MW) LH current drive. Run this shot with 60, 75, 90 and 120 phasing, monitoring time development of pitch angle of field with MSE.

Note: LH phasing should be initially 60 deg, and grill should be set 1 mm behind protective limiter.

Shot plan:

Shots 1-7: Start with shot 1080312028 (6.2 T) but with Ip = 1 MA. Keep nl_04 to 4e19 m-2 or below if possible. Begin with LH power at 500 kW, bringing it up to 1 MW or maximum level for which stable LH pulses can be produced. Adjust shape to optimize coupling, if necessary.

Shots 8-10: Obtain reproducible MSE for 60 deg phasing.

Shots 11-15: Under similar conditions, get data for 75 deg phasing

Shots 16-20: Under similar conditions, get data for 90 deg phasing

Shots 21-25: Under similar conditions, get data for 120 deg phasing

If time, apply 1 MW from J-port and repeat with optimal phasing.

Physics Operators Plans

Entered: Mar 19 2008 05:16:27:820PM

Author: Earl Marmar

Physop run plan for 1080320, Thursday, March 20, 2008

MP:515 Effect of launched n-parallel spectrum on current profile

Session Leader: R. Parker
Physop: E. Marmar (J. Irby filling in until ~10:00 am)

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

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

Power systems as on: 1080312028

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

Enable gatevalves and shutters: ECE, VUV, DNB, Z-bolo

Torvac gatevalve toggle (yes/no): NO

Boronization(yes/no): no
Overnight ECDC (yes/no): YES
ICRF(yes/no): YES, later in the run (J-port only)
LH(yes/no): YES
DNB(yes/no): YES
Cryopump (yes/no): YES

Vessel temperature: 35/35/35

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

Goal: Make clear measurements of LH driven current using MSE, and examine effects of parallel index of refraction on current profile.

Approach: Set-up reproducible, low density discharge and optimize coupling so as to enable high power (~ 1 MW) LH current drive. Run this shot with 60, 75, 90 and 120 phasing, monitoring time development of pitch angle of field with MSE.

Note: LH phasing should be initially 60 deg, and grill should be set 1 mm behind protective limiter.

Shot plan:

Cryopump should be cold from the first shot.

Shots 1-7: Start with shot 1080312028 (6.2 T) but with Ip = 1 MA. Keep nl_04 to 4e19 m-2 or below if possible. Begin with LH power at 500 kW, bringing it up to 1 MW or maximum level for which stable LH pulses can be produced. Adjust shape to optimize coupling, if necessary.

Shots 8-10: Obtain reproducible MSE for 60 deg phasing.

Shots 11-15: Under similar conditions, get data for 75 deg phasing

Shots 16-20: Under similar conditions, get data for 90 deg phasing

Shots 21-25: Under similar conditions, get data for 120 deg phasing

If time, apply 1 MW from J-port and repeat with optimal phasing.

Session Leader Summaries

Entered: Mar 20 2008 06:18:16:870PM

Author: Ron Parker

Overall a pretty good day. The TF all day was at 6.2 T, which helped accessibility.

Lower hybrid RF system performed fairly well, with several shots @ 1 MW.

Phase was scanned from 60 - 120 phasing in accordance with run plan. MSE data were taken throughout run, and results from reducing these data should give a good indication of current profiles vs. phasing.

Shot 2: 1 MA, loop voltage to 0, but decays to 0.5 V. 700 kW, 60 deg

Shot 7: 800 kA, loop voltage to 0.2, decays to 0.4 V. 500-600 kW, 60 deg.

Shot 9: 800 kA, loop voltage slightly positive, decays to 0.25 V. 700 kW, 60 deg no beam.

Shot 10: 800 kA, positive loop voltage, short fault in middle. 800+ kW, 60 deg

Shot 11: 800 kA, positive loop voltage, MHD kills LHCD @ 1.05 s. 800 kW, 60 deg

Shot 12 and 13: similar to 11. On shot 13 900+ kW. still 60 deg.

Shot 15: 800 kA, loop volts decays from 0.13 - 0.3 V, 750 kW, 75 deg

Shot 17: 800 kA, loop volts decays from 0.0 - 0.25 V, 900 kW, 75 deg

Shot 18: 800 kA, loop voltage decays from 0.0 to 0.2 V, 1 MW+, 75 deg

Shot 19: 800 kA, loop voltage decays from 0.1 to .25 V, 925 kW, 75 deg

Shot 20: 800 kA, MHD begins to plague us. 800+ kW, 90 deg

Shot 23: 800 kA, MHD interrupts LHCD @ 0.926 s. Before that loop voltage drops from 0.25 -0.35 V. 850+ kW, 90 deg

Shot 25: 800 kA, Very early and virulent MHD, loop voltage erratic, 800 kW, 90 deg

Shot 28: 800 kA, late MHD, loop voltage ~ 0.6 V, less droop, MHD kills LHCD @ 1.12 s, 650 kW, 120 deg

Shot 29: 800 kA, MHD at end of LH pulse, loop voltage decays from 0.2 to 0.4 V, 900 + kW, 75 deg

Shot 30: 1 MA, Somewhat higher density, loop voltage decays from 0.38 - 0.59 V, 900+ kW, 75 deg

Shot 31: 1 MA, nl_04 ~ 5e19 m-2, loop voltage drops from 0.44 - 0.65, 900+ kW, 75 deg, no MHD problem

Shot 32: 1 MA, nl_04 ~ 5+e19 m-2, loop voltage drops from 0.5 - 0.7, 1.05 MW, 75 deg

Shot 33: 1 MA, nl_04 ~ 4e19 m-2, strong MHD, ~ 1 MW, 75 degree

It seems that MHD comes in when the density is low and LHCD power is high. Not clear how this depends on phase. Better with higher density, but is this because of less current drive?

Physics Operator Summaries

Entered: Mar 20 2008 05:37:03:120PM

Author: Earl Marmar

Summary, 1080320

The machine ran quite well today. Around shot 14, the base pressure started to rise, and it appeared that it was due to a cooling-related leak. The RGA was not working today, so we couldn't look at the constituents of the pressure rise.

Slowing the cooling a bit seemed to solve the problem by about shot 19 or 20. Fill pressure was high by historical standards. Lower pressures lead to fast current rise and bouncing to the outside. The leak gave a fizzle or two. Later in the run, we started alternating between plasmas and fizzles, with occasionally 2 fizzles in a row. Shot 24 seemed to lurch vertically during startup. A .4 mT BR_0 tweak prior to shot 28 was followed by 6 good startups in a row.

Shots today were all at low density, with plenty of hard x-rays both before and after the Lower Hybrid. Raising the density a bit toward the end of the day pretty much eliminated the pre-LH hard x-rays.

Shot 8 had data system problems during init, and was taken as a no-power shot.

Scorecard:

plasmas 25
fizzles 7
no power 1

Total cycles 33

Session Leader Comments

Mar 20 2008 09:17:18:940AM 1080320001 Ron Parker First shot was perfect, as far as plasma is concerned (nl_04 ~ 0.3, Ip = 1 MA.) Unfortunately LH tripped out due to low density at grill, especially at lowest row.

Shot had copius runaways, triggered by LH which tripped after ~ 30 ms.

Mar 20 2008 05:15:17:840PM 1080320002 Ron Parker Shot 2 was almost perfect! One LH trip, but flat LH from 0.8 - 1.2 s. Strong signals from MSE with clear difference between this shot and shot 1.

Characteristic slow development of loop voltage,reaches 0 but decays to 0.5 V.

Density also rises, limiting current drive efficiency.

Next: increase LH power.

Mar 20 2008 09:54:18:393AM 1080320003 Ron Parker Shot 3 was interesting. Higher poer, 900 kW, but tripping. Nevertheless loop voltage above 0 for 50 ms. Next: try again.

Mar 20 2008 09:58:42:457AM 1080320004 Ron Parker Shot 4 had frequent trips. Density at grill is marginally too low.

Push grill in 0.5 mm (!) on next shot.

Mar 20 2008 10:25:26:597AM 1080320005 Ron Parker LH still tripping.

Next, we'll lower current to 800 kA to see if we can recover high power operation.

Mar 20 2008 10:41:26:817AM 1080320006 Ron Parker For this shot, LH power was reduced, current was reduced to 800 kA but LH keeps tripping out. Looks like breakdown somewhere, Greg thinks the breakdown may be in the stacked plates or transformer. We'll continue to lower power to try to find a place where LH doesn't trip out.

Mar 20 2008 11:37:08:527AM 1080320007 Ron Parker
Well, shot plus LH ran and looked like a good shot for MSE to analyze.

Next: increase power to 130 kW/klystron, except for the troublesome no. 10.

Mar 20 2008 11:38:14:997AM 1080320009 Ron Parker Shot 9 ran nicely with ~ 700 kW LH, no trips, but alas, no beam!

Mar 20 2008 11:54:58:997AM 1080320010 Ron Parker Shot 10 ran fairly well, but LH tripped in middle; nevertheless a decent shot for MSE analysis. Note: field rampdown at 1.2 s, set to 1.5 after this shot.

Mar 20 2008 12:19:53:607PM 1080320011 Ron Parker Shot 11 ran well, but LHCD led to MHD instability. Interesting, but not what we wanted.

Mar 20 2008 12:18:47:200PM 1080320012 Ron Parker Shot 12 ran well, again current drive seems to induce MHD instability.

Next shot: increase LH power, after which we'll change phasing.

Mar 20 2008 12:31:07:450PM 1080320013 Ron Parker Pretty good shot, but MHD again kills the current drive.

Power touched 1 MW, and loop voltage reversed to 0.2 V

Next: 75 deg phasing, lower power to ~ 700 kW.

Before run ends, we should try this shot with 1 MA.

Mar 20 2008 12:40:33:527PM 1080320014 Ron Parker Shot 14 fizzled because of a suspected leak.

Mar 20 2008 02:12:06:793PM 1080320015 Ron Parker Shot 15 was good. 75 deg phasing, fairly flat voltage. Some incipient MHD activity on ECE~ 700 kW couled. Next: increase power.

Mar 20 2008 02:13:10:840PM 1080320016 Ron Parker Shot 16 fizzled.

Mar 20 2008 02:15:07:717PM 1080320017 Ron Parker Shot 17 was 75 deg, good shot, no faults, ~ 850 kW

Mar 20 2008 02:16:07:107PM 1080320018 Ron Parker Shot 18 was good, ~ 1 MW, 75 deg.

Mar 20 2008 02:18:30:217PM 1080320019 Ron Parker Shot 19 went through, 900 kW, 75 deg phasing, no faults, MHD at end.

Mar 20 2008 02:19:29:323PM 1080320020 Ron Parker Shot 20, 90 deg, had locked mode and turned really ugly.

Mar 20 2008 02:21:08:777PM 1080320021 Ron Parker Shot 21 fizzled

Mar 20 2008 02:49:49:853PM 1080320023 Ron Parker Shot 23 went off well, 90 deg phasing, ~900 kW LH.

Next: Run 105 deg LH.

Mar 20 2008 02:55:08:527PM 1080320024 Ron Parker Fizzle.

Mar 20 2008 03:21:27:310PM 1080320025 Ron Parker Shot 25 ran OK, but MHD started early -- trend seems to be that higher phase brings on MHD instability earlier.

Mar 20 2008 03:22:10:573PM 1080320026 Ron Parker Phasing changed from 105 to 120. Fizzle

Mar 20 2008 03:33:57:043PM 1080320027 Ron Parker Ooops, another fizzle.

Mar 20 2008 04:24:50:073PM 1080320028 Ron Parker Shot 28 was the obligatory 120 deg shot. Not much current drive.

Mar 20 2008 04:28:06:840PM 1080320029 Ron Parker Shot 29 was back to 75 deg, density nl_04 ~ 4e19 m-2.

Good shot, good beam.

Mar 20 2008 04:22:15:840PM 1080320030 Ron Parker Shot 30 was a good shot. Density a little higher, nl_04 ~ 4.5, loop volts ~ 0.5 V.

Good shot for analysis.

Next: raise density again.

Mar 20 2008 04:39:23:137PM 1080320031 Ron Parker Good shot, flat current, loop voltage, etc.

Next: tease the power up, also slightly higher density..

Mar 20 2008 05:04:06:980PM 1080320032 Ron Parker Another good shot, a little higher density, but 1 MW+ of LH power.

Still 75 deg phasing

Mar 20 2008 05:03:47:840PM 1080320033 Ron Parker Last shot was terrible! Don't look.

Physics Operator Comments

Mar 20 2008 09:09:49:847AM 1080320001 Jim Irby Loaded from 1080312028
Ip from 750 to 1000kA
prefill from 30 to 60 ms (-560 to -500 ms) --- expect cryopump 1st shot
loaded

nl_04 is currently set to 2.5e19/m^2
argon puff from 300 to 500 ms (but disabled for at least the 1st shot)
TF PLC limit at 180 kA (~1.05*172)

plasma into rampdown, but very little lh
density very flat

next shot w/o cryopump

Mar 20 2008 09:32:56:440AM 1080320002 Jim Irby no cryopump for this shot

prefill from -525 to -500 ms
loaded

plasma into rampdown

good lh, ts is back, density still under control

Mar 20 2008 09:54:19:533AM 1080320003 Jim Irby no dpcs changes
no cryopump
no argon

plasma into rampdown

lh tripping

Mar 20 2008 10:06:00:080AM 1080320004 Jim Irby no dpcs changes

plasma into rampdown

Mar 20 2008 10:14:27:487AM 1080320005 Jim Irby Greg enters cell to roll in launcher 0.5 mm
back by t=8 minutes

Mar 20 2008 10:22:17:927AM 1080320005 Earl Marmar plasma

early bounce to the outside, plenty of hards before (and after) the Lower Hybrid

Mar 20 2008 10:41:07:440AM 1080320006 Earl Marmar increase prefill puff to 27 msec (from 25)
Ip to 0.8 MA

plasma
still bouncing, early hards

LH is having arc problems (air side)

Mar 20 2008 10:59:25:033AM 1080320007 Earl Marmar prefill puff to 29 msec

plasma
bounce, early hards
nice LH pulse

Mar 20 2008 11:14:31:060AM 1080320008 Earl Marmar increase prefill puff to 31 msec (from 29)

enable argon, 75 msec starting at .3 seconds
start TF rampdown at 1.2 seconds

trouble during init; no power shot

Mar 20 2008 11:26:14:120AM 1080320009 Earl Marmar no additional dpcs changes

plasma
no bounce, still have early hards
nice LH pulse, V_loop ~ 0.2 volt and flat

Mar 20 2008 11:55:46:497AM 1080320010 Earl Marmar no pcs changes

slight delay for EF3U cooling

plasma
no bounce; still early hards

Mar 20 2008 12:08:41:793PM 1080320011 Earl Marmar He-4 in B-side upper (2 psi)
PG2 puff, full on for 75 msec starting at 1.7 s

extend TF flattop to 1.5 seconds (for MSE)

plasma

good LH pulse
looks like MHD at about 1.1 seconds (~1.5 kHz), lose most of the current drive

Mar 20 2008 12:18:58:247PM 1080320012 Earl Marmar no dpcs changes

plasma
startup still ok, but might be getting a little high on the fill pressure

same MHD just after 1 second as on shot 11

Mar 20 2008 12:33:57:510PM 1080320013 Earl Marmar no dpcs changes
plasma

Mar 20 2008 12:44:45:340PM 1080320014 Earl Marmar reduce prefill puff to 28 msec (from 31 msec)

fill pressure has been increasing from shot to shot
looks like a leak has opened up (RGA not working)

fizzle

Mar 20 2008 01:06:12:467PM 1080320015 Earl Marmar no dpcs changes

plasma

Mar 20 2008 01:06:42:967PM 1080320016 Earl Marmar no dpcs changes

leak is closing

fizzle -- bounced to the outside

Mar 20 2008 05:30:34:870PM 1080320017 Earl Marmar add 2 msec to prefill puff (now 30 msec)

plasma

Mar 20 2008 05:31:26:967PM 1080320018 Earl Marmar increase prefill puff to 32 msec

plasma

Mar 20 2008 01:49:28:607PM 1080320019 Earl Marmar no dpcs changes

plasma
startup is flirting with an outer bounce

Mar 20 2008 02:20:20:170PM 1080320020 Earl Marmar prefill puff to 34 msec

plasma
reports of a locked mode after the LH turns on; current drive goes away

Mar 20 2008 02:21:09:823PM 1080320021 Earl Marmar no dpcs changes

fizzle; got to about 55 kA, current rise might be a bit slow

Mar 20 2008 02:32:30:777PM 1080320022 Earl Marmar prefill puff to 32 msec (from 34 msec)

fizzle
bounces to the outside, but current rise looks slower than on 21

Mar 20 2008 02:47:36:653PM 1080320023 Earl Marmar rcur offset to 1800 (from 1000)
prefill puff to 33 msec (from 32)

plasma
similar to 20

Mar 20 2008 03:00:35:060PM 1080320024 Earl Marmar no dpcs changes

fizzle, got to almost 80 kA then drifted up?

Mar 20 2008 03:12:17:433PM 1080320025 Earl Marmar no dpcs changes

plasma
vertical excursion smaller at 20 msec

Mar 20 2008 03:37:40:793PM 1080320026 Earl Marmar no dpcs changes

fizzle

Mar 20 2008 03:35:25:870PM 1080320027 Earl Marmar prefill puff to 32 msec (from 33)

fizzle

Mar 20 2008 03:54:53:120PM 1080320028 Earl Marmar BR_0 offset to -.0004 T (from 0.0000)

plasma

Mar 20 2008 04:11:01:310PM 1080320029 Earl Marmar nl_04 target to 3.5e19

plasma

Mar 20 2008 04:22:28:810PM 1080320030 Earl Marmar Ip to 1 MA

plasma

Mar 20 2008 04:49:36:480PM 1080320031 Earl Marmar nl_04 target to 4.e19

plasma

Mar 20 2008 04:49:23:060PM 1080320032 Earl Marmar nl_04 target to 4.5e19

plasma

Mar 20 2008 05:04:50:777PM 1080320033 Earl Marmar nl_04 target to 2.5e19

plasma
clean LH pulse, 1 MW, almost no current drive
rumors of locked mode(s)

Engineering Operator Comments

Shot Time Type Status Comment

1 09:02:16:143AM Plasma Ok

2 09:20:10:177AM Plasma Ok

3 09:37:22:567AM Plasma Ok

4 09:53:43:317AM Plasma Ok

5 10:16:02:767AM Plasma Ok

6 10:32:17:270AM Plasma Ok

7 10:46:49:417AM Plasma Ok

8 11:02:15:427AM Plasma Bad init critical failure

9 11:17:45:230AM Plasma Ok

10 11:42:22:043AM Plasma Ok

11 11:55:11:370AM Plasma Ok

12 12:07:48:120PM Plasma Ok

13 12:20:20:323PM Plasma Ok

14 12:33:24:700PM Plasma Ok

15 12:46:42:920PM Plasma Ok

16 01:02:19:293PM Plasma Ok

17 01:15:19:323PM Plasma Ok

18 01:29:01:467PM Plasma Ok

19 01:42:33:560PM Plasma Ok

20 01:59:45:870PM Plasma Ok

21 02:15:08:823PM Plasma Ok

22 02:27:40:107PM Plasma Ok

23 02:40:05:963PM Plasma Ok

24 02:52:48:840PM Plasma Ok

25 03:05:39:590PM Plasma Ok

26 03:18:36:810PM Plasma Ok

27 03:31:11:073PM Plasma Ok

28 03:43:42:370PM Plasma Ok

29 03:58:31:183PM Plasma Ok

30 04:11:43:810PM Plasma Ok

31 04:27:38:670PM Plasma Ok

32 04:40:44:370PM Plasma Ok

33 04:55:51:653PM Plasma Ok

System Availability

Mar 20 2008 09:02:07:080AM

System Available Comment Availability
Changed Owner Description Who Can
Change
Active MHD yes Fully operational Mar 28 2007 09:19PM (sears) Joe Snipes Active MHD Antenna sears,snipes
BES yes vertical array of six views at R ~ 87.3 cm, radial array of three views out to R ~ 89 cm, both at outboard midplane. Three discrete fiber views of beam at R ~ 70.0, 76.5 and 82.5 cm. Feb 06 2007 10:00AM (bravenec) Ron Bravenec Beam Emission Spectroscopy bravenec,rowan
Bolometers yes Diode 2pi working fine, foil 2pi being low-pass filtered to remove noise. Outboard miidplane AXUV has a grounded channel which is disrupting the whole array OFFLINE for now. Midplane foils working fine, but need to fill tree with calibrations. 2D AXUV arrays are being digitized but need further debugging and calibration. Mar 14 2008 11:09AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization no First Boronization 5/9/07 Bottle has been removed from the cell Sep 14 2007 12:42PM (dekow) Jim Irby Boronization dekow,irby
CNPA yes Single channel CNPA available as of 12/1707 Dec 17 2007 05:48PM (parker) Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor yes Cryopump is operational Dec 11 2007 10:13AM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard
CXRS yes The pedestal toroidal array was installed, spatially and absolutely calibrated. There are 10 chords intersect the beam at the major_R_range=[74.2:86.3]cm. Spatial resolution: 1.2 cm. The F-top poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[67.8:91.0]cm. Spatial resolution: 1.22 cm. Nov 27 2007 10:21AM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,rachmcd,rowan
D Alpha yes \ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are available Nov 26 2007 04:23PM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe
Dalsa yes optics repaired, camera re-installed, and view has been re-calibrated Nov 27 2007 09:54AM (marmar) Earl Marmar Visible Bremsstrahlung marmar
Disruption Mitigation no Nov 20 2007 10:47PM (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 Nov 20 2007 10:47PM (granetz) Robert Granetz Diagnostic Neutral Beam beals,granetz
FRC-ECE yes 16 Channels now working - low freq. side - outer Rmids Feb 19 2008 09:56AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips
G-Side Ratiomatic yes Gauge is operational and calibrated against G-side MKS on shot#1071127002 Nov 27 2007 01:25PM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
GPC yes All 9 channels operational as of new year. Jan 03 2008 09:31AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPC2 yes Most channels operational. Jan 02 2008 12:22PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPI no Neither the Xpt-view nor the midplane-view camera is operational. Nov 26 2007 04:25PM (terry) Jim Terry Gas Puff Imaging terry,zweben
H/D yes Should be operational for the FY08 campaign Nov 27 2007 09:54AM (marmar) Earl Marmar H/D Ratio marmar
Hirex Jr yes Mar 06 2007 08:59AM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr no Be Window has a leak and so the gate valve is closed Nov 23 2007 12:50PM (ince) John Rice High Resolution X-Ray ince,rice
HXR yes Something might be wrong with channel 26; all others working fine. Mar 23 2007 10:43AM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt
ICRF D-Antenna yes available (quarter-wave transformer for pre-matching) Dec 11 2007 09:01AM (ylin) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes available (with FFT for automatical matching) Dec 11 2007 09:01AM (ylin) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes normally in [0,pi,pi,0] phase for heating. current drive phase available if requested. Dec 11 2007 09:03AM (ylin) Steve Wukitch J-port antenna wukitch,ylin
Lower Hybrid yes Body I Fault Circuits Repaired and tested. High power tests completed Dec 05 2007 06:40PM (dterry) Ron Parker Lower Hybrid dterry,parker
LPI yes 1/9/08 Jan 09 2008 03:23PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha yes Midplane working fine, emissivity profiles being stored in tree, but still need to apply in-vessel calibrations to data. WB1-LY being digitized, but not processed in tree. Dec 09 2007 06:53PM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke
McPherson no Problems with detector. No quantitative line brightnesses possible. Qualitative tasks like impurity identification possible. Feb 15 2008 02:07PM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Working, moderate speed for now. Jan 02 2008 01:19PM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes E-Top, E-Bottom, F-top (cryo), G-side, and B-bottom are operational. F-top gauge has a 'sniffer tube' to measure pressures in cryopump gas box. Mar 20 2007 06:42PM (g) Brian LaBombard Baratron pressure gauges labombard
MLP no Initial tests on the A-port scanning probe went well. We need to take care of some control glitches that caused some component failures. May 30 2007 08:01PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard
MSE no We are basically awaiting the DNB & its new aperture. MSE itself is OK. Feb 21 2008 08:51AM (jinseok) Steve Scott Motional Stark Effect jinseok,sscott
Neutrons yes Voltage is on for the He3 bank. Voltage will be turned on for the global system at the first plasma attempts. Nov 26 2007 08:31AM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes calibration unchanged from 2007 campaign Dec 04 2007 08:56PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby
NINJA yes All capillaries displayed by the NINJA_CONTROL GUI have been tested. Nov 26 2007 04:26PM (terry) Brian LaBombard NINJA gas puff labombard,terry
PCI yes working Feb 29 2008 07:00PM (lianglin) Miklos Porkolab Phase Contrast Imaging edlund,lianglin,ntsujii,porkolab
Penning Gauges yes All gauges except B_DivL are operating Nov 27 2007 01:31PM (labombard) Brian LaBombard Penning Ionization Gauges labombard
Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Nov 26 2007 04:27PM (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
Probe Array - ISD yes Operational Nov 27 2007 01:40PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH yes Operational Nov 27 2007 01:40PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes Operational Nov 27 2007 01:41PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard
Probe Array - UDIV yes Operational Nov 27 2007 01:41PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes The 50 and 110 channels are connected. the 60 is connected but off for the first shots. the 140 channel is connected Mar 20 2008 09:01AM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Operational, but needs to be checked with plasma. Nov 27 2007 01:45PM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes FSP is operational Dec 11 2007 10:13AM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP yes A- and K-port WASP electrodes have been replaced/tested. Nov 27 2007 01:44PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
TCI yes CO2 Laser is on --- initial alignment complete Nov 16 2007 01:23PM (irby) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes 12 polychromators (#1~8,9,11,13,15), 1 laser. Density is calibrated for YAG1 based on ECE cutoff data taken on Mar11. YAG2 is offline. Mar 14 2008 09:59AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma
TS - Edge yes System is working with 3 out of 4 spectral channels and should be believable for Te>50eV, ne>3e19. Density is calibrated from both Raman scattering in D2 (3/2/08) and from edge ECE cutoffs in high-density H-modes (1080228014). Mar 17 2008 10:26AM (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
XTOMO yes system operational, but channels have been dying...stay tuned. Mar 14 2008 11:10AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke

Mar 20 2008 12:20:14:933PM

System Available Comment Availability
Changed Owner Description Who Can
Change
Active MHD yes Fully operational Mar 28 2007 09:19PM (sears) Joe Snipes Active MHD Antenna sears,snipes
BES yes vertical array of six views at R ~ 87.3 cm, radial array of three views out to R ~ 89 cm, both at outboard midplane. Three discrete fiber views of beam at R ~ 70.0, 76.5 and 82.5 cm. Feb 06 2007 10:00AM (bravenec) Ron Bravenec Beam Emission Spectroscopy bravenec,rowan
Bolometers yes Diode 2pi working fine, foil 2pi being low-pass filtered to remove noise. Outboard miidplane AXUV has a grounded channel which is disrupting the whole array OFFLINE for now. Midplane foils working fine, but need to fill tree with calibrations. 2D AXUV arrays are being digitized but need further debugging and calibration. Mar 14 2008 11:09AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization no First Boronization 5/9/07 Bottle has been removed from the cell Sep 14 2007 12:42PM (dekow) Jim Irby Boronization dekow,irby
CNPA yes Single channel CNPA available as of 12/1707 Dec 17 2007 05:48PM (parker) Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor yes Cryopump is operational Dec 11 2007 10:13AM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard
CXRS yes The pedestal toroidal array was installed, spatially and absolutely calibrated. There are 10 chords intersect the beam at the major_R_range=[74.2:86.3]cm. Spatial resolution: 1.2 cm. The F-top poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[67.8:91.0]cm. Spatial resolution: 1.22 cm. Nov 27 2007 10:21AM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,rachmcd,rowan
D Alpha yes \ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are available Nov 26 2007 04:23PM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe
Dalsa yes optics repaired, camera re-installed, and view has been re-calibrated Nov 27 2007 09:54AM (marmar) Earl Marmar Visible Bremsstrahlung marmar
Disruption Mitigation no Nov 20 2007 10:47PM (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 Nov 20 2007 10:47PM (granetz) Robert Granetz Diagnostic Neutral Beam beals,granetz
FRC-ECE yes 16 Channels now working - low freq. side - outer Rmids Feb 19 2008 09:56AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips
G-Side Ratiomatic yes Gauge is operational and calibrated against G-side MKS on shot#1071127002 Nov 27 2007 01:25PM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
GPC yes All 9 channels operational as of new year. Jan 03 2008 09:31AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPC2 yes Most channels operational. Jan 02 2008 12:22PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPI no Neither the Xpt-view nor the midplane-view camera is operational. Nov 26 2007 04:25PM (terry) Jim Terry Gas Puff Imaging terry,zweben
H/D yes Should be operational for the FY08 campaign Nov 27 2007 09:54AM (marmar) Earl Marmar H/D Ratio marmar
Hirex Jr yes Mar 06 2007 08:59AM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr no Be Window has a leak and so the gate valve is closed Nov 23 2007 12:50PM (ince) John Rice High Resolution X-Ray ince,rice
HXR yes Something might be wrong with channel 26; all others working fine. Mar 23 2007 10:43AM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt
ICRF D-Antenna yes available (quarter-wave transformer for pre-matching) Dec 11 2007 09:01AM (ylin) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes available (with FFT for automatical matching) Dec 11 2007 09:01AM (ylin) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes normally in [0,pi,pi,0] phase for heating. current drive phase available if requested. Dec 11 2007 09:03AM (ylin) Steve Wukitch J-port antenna wukitch,ylin
Lower Hybrid yes Body I Fault Circuits Repaired and tested. High power tests completed Dec 05 2007 06:40PM (dterry) Ron Parker Lower Hybrid dterry,parker
LPI yes 1/9/08 Jan 09 2008 03:23PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha yes Midplane working fine, emissivity profiles being stored in tree, but still need to apply in-vessel calibrations to data. WB1-LY being digitized, but not processed in tree. Dec 09 2007 06:53PM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke
McPherson no Problems with detector. No quantitative line brightnesses possible. Qualitative tasks like impurity identification possible. Feb 15 2008 02:07PM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Working, moderate speed for now. Jan 02 2008 01:19PM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes E-Top, E-Bottom, F-top (cryo), G-side, and B-bottom are operational. F-top gauge has a 'sniffer tube' to measure pressures in cryopump gas box. Mar 20 2007 06:42PM (g) Brian LaBombard Baratron pressure gauges labombard
MLP no Initial tests on the A-port scanning probe went well. We need to take care of some control glitches that caused some component failures. May 30 2007 08:01PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard
MSE no We are basically awaiting the DNB & its new aperture. MSE itself is OK. Feb 21 2008 08:51AM (jinseok) Steve Scott Motional Stark Effect jinseok,sscott
Neutrons yes Voltage is on for the He3 bank. Voltage will be turned on for the global system at the first plasma attempts. Nov 26 2007 08:31AM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes calibration unchanged from 2007 campaign Dec 04 2007 08:56PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby
NINJA yes All capillaries displayed by the NINJA_CONTROL GUI have been tested. Nov 26 2007 04:26PM (terry) Brian LaBombard NINJA gas puff labombard,terry
PCI yes working Feb 29 2008 07:00PM (lianglin) Miklos Porkolab Phase Contrast Imaging edlund,lianglin,ntsujii,porkolab
Penning Gauges yes All gauges except B_DivL are operating Nov 27 2007 01:31PM (labombard) Brian LaBombard Penning Ionization Gauges labombard
Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Nov 26 2007 04:27PM (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
Probe Array - ISD yes Operational Nov 27 2007 01:40PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH yes Operational Nov 27 2007 01:40PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes Operational Nov 27 2007 01:41PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard
Probe Array - UDIV yes Operational Nov 27 2007 01:41PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer no System offline Mar 20 2008 12:08PM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Operational, but needs to be checked with plasma. Nov 27 2007 01:45PM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes FSP is operational Dec 11 2007 10:13AM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP yes A- and K-port WASP electrodes have been replaced/tested. Nov 27 2007 01:44PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
TCI yes CO2 Laser is on --- initial alignment complete Nov 16 2007 01:23PM (irby) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes 12 polychromators (#1~8,9,11,13,15), 1 laser. Density is calibrated for YAG1 based on ECE cutoff data taken on Mar11. YAG2 is offline. Mar 14 2008 09:59AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma
TS - Edge yes System is working with 3 out of 4 spectral channels and should be believable for Te>50eV, ne>3e19. Density is calibrated from both Raman scattering in D2 (3/2/08) and from edge ECE cutoffs in high-density H-modes (1080228014). Mar 17 2008 10:26AM (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
XTOMO yes system operational, but channels have been dying...stay tuned. Mar 14 2008 11:10AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke

Session Leader Comments
Mar 20 2008 09:17:18:940AM	1080320001	Ron Parker	First shot was perfect, as far as plasma is concerned (nl_04 ~ 0.3, Ip = 1 MA.) Unfortunately LH tripped out due to low density at grill, especially at lowest row. Shot had copius runaways, triggered by LH which tripped after ~ 30 ms.
Mar 20 2008 05:15:17:840PM	1080320002	Ron Parker	Shot 2 was almost perfect! One LH trip, but flat LH from 0.8 - 1.2 s. Strong signals from MSE with clear difference between this shot and shot 1. Characteristic slow development of loop voltage,reaches 0 but decays to 0.5 V. Density also rises, limiting current drive efficiency. Next: increase LH power.
Mar 20 2008 09:54:18:393AM	1080320003	Ron Parker	Shot 3 was interesting. Higher poer, 900 kW, but tripping. Nevertheless loop voltage above 0 for 50 ms. Next: try again.
Mar 20 2008 09:58:42:457AM	1080320004	Ron Parker	Shot 4 had frequent trips. Density at grill is marginally too low. Push grill in 0.5 mm (!) on next shot.
Mar 20 2008 10:25:26:597AM	1080320005	Ron Parker	LH still tripping. Next, we'll lower current to 800 kA to see if we can recover high power operation.
Mar 20 2008 10:41:26:817AM	1080320006	Ron Parker	For this shot, LH power was reduced, current was reduced to 800 kA but LH keeps tripping out. Looks like breakdown somewhere, Greg thinks the breakdown may be in the stacked plates or transformer. We'll continue to lower power to try to find a place where LH doesn't trip out.
Mar 20 2008 11:37:08:527AM	1080320007	Ron Parker	Well, shot plus LH ran and looked like a good shot for MSE to analyze. Next: increase power to 130 kW/klystron, except for the troublesome no. 10.
Mar 20 2008 11:38:14:997AM	1080320009	Ron Parker	Shot 9 ran nicely with ~ 700 kW LH, no trips, but alas, no beam!
Mar 20 2008 11:54:58:997AM	1080320010	Ron Parker	Shot 10 ran fairly well, but LH tripped in middle; nevertheless a decent shot for MSE analysis. Note: field rampdown at 1.2 s, set to 1.5 after this shot.
Mar 20 2008 12:19:53:607PM	1080320011	Ron Parker	Shot 11 ran well, but LHCD led to MHD instability. Interesting, but not what we wanted.
Mar 20 2008 12:18:47:200PM	1080320012	Ron Parker	Shot 12 ran well, again current drive seems to induce MHD instability. Next shot: increase LH power, after which we'll change phasing.
Mar 20 2008 12:31:07:450PM	1080320013	Ron Parker	Pretty good shot, but MHD again kills the current drive. Power touched 1 MW, and loop voltage reversed to 0.2 V Next: 75 deg phasing, lower power to ~ 700 kW. Before run ends, we should try this shot with 1 MA.
Mar 20 2008 12:40:33:527PM	1080320014	Ron Parker	Shot 14 fizzled because of a suspected leak.
Mar 20 2008 02:12:06:793PM	1080320015	Ron Parker	Shot 15 was good. 75 deg phasing, fairly flat voltage. Some incipient MHD activity on ECE~ 700 kW couled. Next: increase power.
Mar 20 2008 02:13:10:840PM	1080320016	Ron Parker	Shot 16 fizzled.
Mar 20 2008 02:15:07:717PM	1080320017	Ron Parker	Shot 17 was 75 deg, good shot, no faults, ~ 850 kW
Mar 20 2008 02:16:07:107PM	1080320018	Ron Parker	Shot 18 was good, ~ 1 MW, 75 deg.
Mar 20 2008 02:18:30:217PM	1080320019	Ron Parker	Shot 19 went through, 900 kW, 75 deg phasing, no faults, MHD at end.
Mar 20 2008 02:19:29:323PM	1080320020	Ron Parker	Shot 20, 90 deg, had locked mode and turned really ugly.
Mar 20 2008 02:21:08:777PM	1080320021	Ron Parker	Shot 21 fizzled
Mar 20 2008 02:49:49:853PM	1080320023	Ron Parker	Shot 23 went off well, 90 deg phasing, ~900 kW LH. Next: Run 105 deg LH.
Mar 20 2008 02:55:08:527PM	1080320024	Ron Parker	Fizzle.
Mar 20 2008 03:21:27:310PM	1080320025	Ron Parker	Shot 25 ran OK, but MHD started early -- trend seems to be that higher phase brings on MHD instability earlier.
Mar 20 2008 03:22:10:573PM	1080320026	Ron Parker	Phasing changed from 105 to 120. Fizzle
Mar 20 2008 03:33:57:043PM	1080320027	Ron Parker	Ooops, another fizzle.
Mar 20 2008 04:24:50:073PM	1080320028	Ron Parker	Shot 28 was the obligatory 120 deg shot. Not much current drive.
Mar 20 2008 04:28:06:840PM	1080320029	Ron Parker	Shot 29 was back to 75 deg, density nl_04 ~ 4e19 m-2. Good shot, good beam.
Mar 20 2008 04:22:15:840PM	1080320030	Ron Parker	Shot 30 was a good shot. Density a little higher, nl_04 ~ 4.5, loop volts ~ 0.5 V. Good shot for analysis. Next: raise density again.
Mar 20 2008 04:39:23:137PM	1080320031	Ron Parker	Good shot, flat current, loop voltage, etc. Next: tease the power up, also slightly higher density..
Mar 20 2008 05:04:06:980PM	1080320032	Ron Parker	Another good shot, a little higher density, but 1 MW+ of LH power. Still 75 deg phasing
Mar 20 2008 05:03:47:840PM	1080320033	Ron Parker	Last shot was terrible! Don't look.

Physics Operator Comments
Mar 20 2008 09:09:49:847AM	1080320001	Jim Irby	Loaded from 1080312028 Ip from 750 to 1000kA prefill from 30 to 60 ms (-560 to -500 ms) --- expect cryopump 1st shot loaded nl_04 is currently set to 2.5e19/m^2 argon puff from 300 to 500 ms (but disabled for at least the 1st shot) TF PLC limit at 180 kA (~1.05*172) plasma into rampdown, but very little lh density very flat next shot w/o cryopump
Mar 20 2008 09:32:56:440AM	1080320002	Jim Irby	no cryopump for this shot prefill from -525 to -500 ms loaded plasma into rampdown good lh, ts is back, density still under control
Mar 20 2008 09:54:19:533AM	1080320003	Jim Irby	no dpcs changes no cryopump no argon plasma into rampdown lh tripping
Mar 20 2008 10:06:00:080AM	1080320004	Jim Irby	no dpcs changes plasma into rampdown
Mar 20 2008 10:14:27:487AM	1080320005	Jim Irby	Greg enters cell to roll in launcher 0.5 mm back by t=8 minutes
Mar 20 2008 10:22:17:927AM	1080320005	Earl Marmar	plasma early bounce to the outside, plenty of hards before (and after) the Lower Hybrid
Mar 20 2008 10:41:07:440AM	1080320006	Earl Marmar	increase prefill puff to 27 msec (from 25) Ip to 0.8 MA plasma still bouncing, early hards LH is having arc problems (air side)
Mar 20 2008 10:59:25:033AM	1080320007	Earl Marmar	prefill puff to 29 msec plasma bounce, early hards nice LH pulse
Mar 20 2008 11:14:31:060AM	1080320008	Earl Marmar	increase prefill puff to 31 msec (from 29) enable argon, 75 msec starting at .3 seconds start TF rampdown at 1.2 seconds trouble during init; no power shot
Mar 20 2008 11:26:14:120AM	1080320009	Earl Marmar	no additional dpcs changes plasma no bounce, still have early hards nice LH pulse, V_loop ~ 0.2 volt and flat
Mar 20 2008 11:55:46:497AM	1080320010	Earl Marmar	no pcs changes slight delay for EF3U cooling plasma no bounce; still early hards
Mar 20 2008 12:08:41:793PM	1080320011	Earl Marmar	He-4 in B-side upper (2 psi) PG2 puff, full on for 75 msec starting at 1.7 s extend TF flattop to 1.5 seconds (for MSE) plasma good LH pulse looks like MHD at about 1.1 seconds (~1.5 kHz), lose most of the current drive
Mar 20 2008 12:18:58:247PM	1080320012	Earl Marmar	no dpcs changes plasma startup still ok, but might be getting a little high on the fill pressure same MHD just after 1 second as on shot 11
Mar 20 2008 12:33:57:510PM	1080320013	Earl Marmar	no dpcs changes plasma
Mar 20 2008 12:44:45:340PM	1080320014	Earl Marmar	reduce prefill puff to 28 msec (from 31 msec) fill pressure has been increasing from shot to shot looks like a leak has opened up (RGA not working) fizzle
Mar 20 2008 01:06:12:467PM	1080320015	Earl Marmar	no dpcs changes plasma
Mar 20 2008 01:06:42:967PM	1080320016	Earl Marmar	no dpcs changes leak is closing fizzle -- bounced to the outside
Mar 20 2008 05:30:34:870PM	1080320017	Earl Marmar	add 2 msec to prefill puff (now 30 msec) plasma
Mar 20 2008 05:31:26:967PM	1080320018	Earl Marmar	increase prefill puff to 32 msec plasma
Mar 20 2008 01:49:28:607PM	1080320019	Earl Marmar	no dpcs changes plasma startup is flirting with an outer bounce
Mar 20 2008 02:20:20:170PM	1080320020	Earl Marmar	prefill puff to 34 msec plasma reports of a locked mode after the LH turns on; current drive goes away
Mar 20 2008 02:21:09:823PM	1080320021	Earl Marmar	no dpcs changes fizzle; got to about 55 kA, current rise might be a bit slow
Mar 20 2008 02:32:30:777PM	1080320022	Earl Marmar	prefill puff to 32 msec (from 34 msec) fizzle bounces to the outside, but current rise looks slower than on 21
Mar 20 2008 02:47:36:653PM	1080320023	Earl Marmar	rcur offset to 1800 (from 1000) prefill puff to 33 msec (from 32) plasma similar to 20
Mar 20 2008 03:00:35:060PM	1080320024	Earl Marmar	no dpcs changes fizzle, got to almost 80 kA then drifted up?
Mar 20 2008 03:12:17:433PM	1080320025	Earl Marmar	no dpcs changes plasma vertical excursion smaller at 20 msec
Mar 20 2008 03:37:40:793PM	1080320026	Earl Marmar	no dpcs changes fizzle
Mar 20 2008 03:35:25:870PM	1080320027	Earl Marmar	prefill puff to 32 msec (from 33) fizzle
Mar 20 2008 03:54:53:120PM	1080320028	Earl Marmar	BR_0 offset to -.0004 T (from 0.0000) plasma
Mar 20 2008 04:11:01:310PM	1080320029	Earl Marmar	nl_04 target to 3.5e19 plasma
Mar 20 2008 04:22:28:810PM	1080320030	Earl Marmar	Ip to 1 MA plasma
Mar 20 2008 04:49:36:480PM	1080320031	Earl Marmar	nl_04 target to 4.e19 plasma
Mar 20 2008 04:49:23:060PM	1080320032	Earl Marmar	nl_04 target to 4.5e19 plasma
Mar 20 2008 05:04:50:777PM	1080320033	Earl Marmar	nl_04 target to 2.5e19 plasma clean LH pulse, 1 MW, almost no current drive rumors of locked mode(s)

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:02:16:143AM	Plasma	Ok
2	09:20:10:177AM	Plasma	Ok
3	09:37:22:567AM	Plasma	Ok
4	09:53:43:317AM	Plasma	Ok
5	10:16:02:767AM	Plasma	Ok
6	10:32:17:270AM	Plasma	Ok
7	10:46:49:417AM	Plasma	Ok
8	11:02:15:427AM	Plasma	Bad	init critical failure
9	11:17:45:230AM	Plasma	Ok
10	11:42:22:043AM	Plasma	Ok
11	11:55:11:370AM	Plasma	Ok
12	12:07:48:120PM	Plasma	Ok
13	12:20:20:323PM	Plasma	Ok
14	12:33:24:700PM	Plasma	Ok
15	12:46:42:920PM	Plasma	Ok
16	01:02:19:293PM	Plasma	Ok
17	01:15:19:323PM	Plasma	Ok
18	01:29:01:467PM	Plasma	Ok
19	01:42:33:560PM	Plasma	Ok
20	01:59:45:870PM	Plasma	Ok
21	02:15:08:823PM	Plasma	Ok
22	02:27:40:107PM	Plasma	Ok
23	02:40:05:963PM	Plasma	Ok
24	02:52:48:840PM	Plasma	Ok
25	03:05:39:590PM	Plasma	Ok
26	03:18:36:810PM	Plasma	Ok
27	03:31:11:073PM	Plasma	Ok
28	03:43:42:370PM	Plasma	Ok
29	03:58:31:183PM	Plasma	Ok
30	04:11:43:810PM	Plasma	Ok
31	04:27:38:670PM	Plasma	Ok
32	04:40:44:370PM	Plasma	Ok
33	04:55:51:653PM	Plasma	Ok