Alcator C-Mod Run 1120821 Information

Miniproposals

Miniproposal: 605

Date Filed: 6/10/2010

Title: LH2 lower hybrid launcher checkout and conditioning

First Author: Greg Wallace

Session Leader: Greg Wallace (shots 1-16)

Miniproposal: 662

Date Filed: 8/9/2011

Title: HiReX Sr startup MP

First Author: Yuri Podpaly

Session Leader: Matt Reinke (shots 17-32)

Operators
Session leader(s):	Greg Wallace,Matt Reinke
Physics operator(s):	Ian Hutchinson
Engineering operator(s):	Bill Cochran,Bill Parkin,Gary Dekow

Engineering Operator Run Comment
MP605: LH2 lower hybrid launcher checkout and conditioning

Session Leader Plans

Entered: Aug 20 2012 05:15:53:423PM

Author: Greg Wallace

Session leader plan for 1120821
PO: I. Hutchinson
SL: G. Wallace
MP605: LH2 lower hybrid launcher checkout and conditioning

Start from shot 1120820030.

1) Reduce Ip to 800 kA and nebar to 7e19 during flattop. Re-establish LH operation from 1120820. (120 kW/klystron, 90 deg CCD phasing, 0.8-1.0 s). Adjust plasma shape and CPS trip levels as necessary.

2) Increase LH power and pulse length.

Entered: Aug 21 2012 11:40:15:003AM

Author: Matt Reinke

MP 662 - HIREXSR Startup

We've change HIREXSR to view H-like Ar across the entire plasma cross-section and H-like Ca in the core. This requires some run-time to re-align and focus the instrument using repeatable plasma shots. For the standard configuration Ohmic plasma have been used, but his layout is geared toward high Te so an ICRF-heated L-mode will be used.

GOALS: run-repeated L-mode plasmas and do focusing and masking tests. If time remains, demonstate the instrument in a high (Te ~ 6 keV) I-mode plasma.

1) Load 1120820025 and raise Ip to 1.1 MA, keep nl04 ~ 0.7. Add 3 MW of ICRF power from 0.7-1.35. Adjust strike points if necessary and add Ne to ensure good divertor compatibility. Demonstrate repeatability (3-4 shots)

2) Do a 5-point focus scan (x3 mod 34,000 < 60,0000), (x1 mod 0 < 36,000)

3) Place system at minimum of Ti and do masking tests
a) left, right, medium small(x3)
b) left, right, up, down (x1)

4) Develop higher Ip locked mode (try for 1.1 MA, lower to 1.0 if can't get it)

5) I-mode test plasmas to demonstrate new HIREXSR capabilities and develop divertor strategy for rev. B.

Physics Operators Plans

Session Leader Summaries

Entered: Aug 21 2012 04:22:18:780PM

Author: Greg Wallace

SL Summary for 1120821(am)
MP 605 LH2 Lower Hybrid Launcher Checkout and Conditioning

SL: G. Wallace
PO: I. Hutchinson

The purpose of today's run was to verify proper modification of the LH2 lower hybrid launcher for operation in reverse field direction. The phase shims used in the jungle gym for forward field phasing were removed and replaced with new shims specifically cut for operation in reverse field. There exists no full calibration of the launcher with the reverse field shims installed, so it was important to verify that the calculations used to determine the phase shim lengths are correct. A fully non-inductive discharge would allow for a simple measure of the efficiency figure of merit, n*I*R/P, to prove definitively that the phasing is correct.

Shots 1-16 were dedicated to bringing up the LH power and extending pulse length. The early discharges were at very high density despite little or no puffing outside of segment 1. As this density continued to drop, the amount of current drive increased steadily. The density rose significantly during the earlier LH pulses, which may be due to increased outgassing from low numbered waveguide columns. (In normal field direction the waves travel across the launcher towards higher numbered columns, while in reverse field the waves travel the opposite direction. The electric fields at the low number columns will increase in reverse field, which may increase outgassing at first.)

Significant current drive was achieved at 5.4 T and 800 kA with net powers between 600 and 800 kA. The loop voltage transiently crossed 0 several times, but did not remain there as the density climbed during the LH pulse. After switching to 600 kA we sustained a loop voltage of only 0.15 V (0.8 V Ohmic) for the duration of the LH pulse. An upper bound on the current drive efficiency is ~2.5e19 AW^-1m^-2, which agrees with the efficiency found in normal field configuration.

tl;dr:
The switch over to reverse field operation is a success and the LH system is ready for physics operation.

Entered: Aug 21 2012 05:26:43:963PM

Author: Matt Reinke

We were able to effectively use the 1/2 run day to focus both the H-like Ar and H-like Ca systems and do x2 vignetting tests of H-like Ar. Will process that data and make changes before Friday if necessary. I'm not worried about the H-like Ca since the emission is more core localized.

We lost ~40 minutes to TORVAC power problems which prevented us from getting to the locked mode development. First I-mode physics run that needs HIREXSR may need to lose ~3 shots to make sure the locked mode is working.

Much work is needed to covert THACO over to using this new alignment and get good shot-to-shot feedback for session leaders for the coming weeks.

Also, we did some target discharge development and have a good starting point for I-modes. The heat flux is up on the 2nd tile on the inner divertor and spread over the outer divertor and has low/medium Ne seeding. If we hadn't lost time to the TORVAC problems we would have increased power and seeding.

Physics Operator Summaries

Entered: Aug 21 2012 05:13:01:780PM

Author: Ian Hutchinson

Summary
-------

Most of the two purposes of the run were achieved. A problem
with power to the vacuum gauges lost about an hour at the end.

Physop Observations
__________________

Startup was generally satisfactory but fizzles were obtained after a
1.1MA disruption. The current ramp was adjusted to obtain fairly early
diversions (~.15s vs .25s in the original version of this shot).
Various segment switch matching adjustments were made to reduce
perturbations. Shot 31 would be a good place to start for loading and
developing additional shots. ICEF4 might need to be lowered by maybe
20A. Then Ip, nl04, or rcur tweaks on that are probably preferable to
choosing an earlier shot and trying to redo the segment switch
matching. A locked mode shot (segment 3) was attempted in shot 32 but
disupted from radiative death apparently because of Ar overdose,
150ms. Probably 50ms (PG5) is nearer the right amount.

The density eventually became well controlled at a low level during the
LH experiments. How much of this was early diversion versus simply
purging the walls is unclear.

Scorecard
---------

Shot,Duration(s),Ipmax(MA),Result Shot,Duration(s),Ipmax,Result | 1 No Ip | 02 1.950 0.810 Plasma | | 03 1.950 0.813 Plasma | 04 1.961 0.822 Plasma | | 05 1.966 0.827 Plasma | 06 1.969 0.827 Plasma | | 07 1.971 0.840 Plasma | 08 1.970 0.841 Plasma | | 09 1.971 0.840 Plasma | 10 0.000 0.048 Fizzle | | 11 1.970 0.838 Plasma | 12 1.969 0.839 Plasma | | 13 1.971 0.700 Plasma | 14 1.969 0.700 Plasma | | 15 1.970 0.685 Plasma | 16 1.972 0.698 Plasma | | 17 1.723 1.123 Plasma | 18 1.809 1.113 Plasma | | 19 1.036 1.209 Plasma | 20 0.000 0.049 Fizzle | | 21 0.000 0.046 Fizzle | 22 1.878 1.113 Plasma | | 23 1.812 1.112 Plasma | 24 1.813 1.110 Plasma | | 25 1.819 1.112 Plasma | 26 1.806 1.111 Plasma | | 27 1.811 1.111 Plasma | 28 1.800 1.111 Plasma | | 29 1.800 1.111 Plasma | 30 1.818 1.111 Plasma | | 31 1.796 1.111 Plasma | 32 0.475 0.826 Plasma | Date 1120821: 32 shots. 28 plasmas. 3 fizzles. 0 duds. 1 System Error. Total plasma duration: 50.73 s (exceeding 100 kA)

Session Leader Comments

Aug 21 2012 09:20:59:537AM 1120821001 Greg Wallace LH at 120 kW/klystron, 90 deg CCD phasing. Fired at t=0, not t=0.8-1.0. Density much higher than requested. Next shot will have correct timing of LH pulse.

Aug 21 2012 09:38:07:967AM 1120821003 Greg Wallace One fault during LH pulse at 120 kW/klystron, 90 deg CCD phasing, ~500 kW net. Looks like it might be breakdown on the plasma side (spike on refco on many columns at same time). Next shot will increase pulse length to 0.7-1.2 s at same power level of 120 kW/klystron, 90 deg CCD phasing. Also keep trying to decrease density.

Aug 21 2012 09:48:21:477AM 1120821004 Greg Wallace Clean LH pulse at 120 kW/klystron, 90 deg CCD phasing, ~500 kW net. Density still quite high, nebar ~ 1.25e20. Next shot will increase LH power to 150 kW/klystron and try to decrease density again.

Aug 21 2012 10:03:42:270AM 1120821005 Greg Wallace Many LH faults due to high reflections. Line averaged density finally came down which also reduced LH probe density.

Next shot will decrease outer gap by 4 mm to improve LH coupling. Also move launcher in from 1279 to 1278.

Aug 21 2012 10:23:06:033AM 1120821006 Greg Wallace One LH fault at 150 kW/klystron, 90 deg CCD, ~625 kW net. Looks like it could be breakdown in col 3. Nothing obvious on the LH camera. Launcher seems to have crept in to 1277. Will move back slightly to 1278. Next shot will repeat at this power level.

Aug 21 2012 10:32:03:363AM 1120821007 Greg Wallace One fault in LH pulse at 150 kW/klystron, 90 deg CCD phasing, ~625 kW net power. Fault occurs at 0.97 s, can be seen on frame 29 of LH camera. Looks like breakdown on plasma side C-row. Will stay at this power level to see if it clears.

Aug 21 2012 10:47:15:723AM 1120821008 Greg Wallace Clean LH pulse at 150 kW/klystron, 90 deg CCD phasing, ~625 kW net. Strong current drive early in LH pulse, but density rises during pulse from 4e19 to 8e19. About 50% loop voltage reduction by the end of the pulse. Next shot will go up to 170 kW/klystron and hope density doesn't rise so much.

Aug 21 2012 11:13:28:570AM 1120821009 Greg Wallace One fault near end of the LH pulse at 170 kW/klystron, 90 deg CCD phasing, ~725 kW net power. Nothing obvious on LH camera but clearly plasma side breakdown looking at the reflected power signals. Next shot will repeat with this power to see if it clears up. Clear signs of current drive in this discharge.

Aug 21 2012 11:17:04:010AM 1120821010 Greg Wallace Fizzle.

Aug 21 2012 11:33:04:397AM 1120821011 Greg Wallace Many faults. Density too low at edge (nebar < 4e19!!!) for coupling. Next shot will increase line averaged density which should improve coupling.

Aug 21 2012 11:49:31:007AM 1120821012 Greg Wallace Two faults, looks like an arc on col 2? Will stay at this power level for now. Next shot will decrease to 600 kA.

Aug 21 2012 12:03:11:137PM 1120821013 Greg Wallace Many faults due to breakdown on the plasma side at 170 kW/klystron, 90 deg CCD phasing, 800 kW net power. Next shot will reduce to 150 kW/klystron to see if things improve.

Aug 21 2012 12:16:47:650PM 1120821014 Greg Wallace More faulting at 150 kW/klystron, 90 deg CCD phasing. Seems to not really like the 600 kA discharge. Could be "broader" SOL profiles at the lower current? Next shot will increase outer gap by 3mm (reduce heat flux on launcher) and move timing to 0.8-1.3 s (avoid crossover in early part of LH pulse).

Aug 21 2012 12:29:39:787PM 1120821015 Greg Wallace Several faults at 150 kW/klystron, 90 deg CCD. Still breaking down on the plasma side. Better than shot 14---bigger gap seemed to help. Next shot will increase outer gap by another 3mm.

Aug 21 2012 12:40:01:420PM 1120821016 Greg Wallace Much better with the larger outer gap. Only two faults. Still looks like breakdown on plasma side, maybe col 2 or 3? 150 kW/klystron, 90 deg CCD phasing, ~725 kW net. Sustained Vloop near 0.15 V. Last shot of the day for MP 605.

Aug 21 2012 01:06:31:070PM 1120821017 Matt Reinke Transitioning over the MP 662 - HIREXSR Calibration.

First goal is to setup a repeatable ICRF-heated L-mode plasma for use in diagnostic configuration changes.

LSN, Ip=1.1, nl04~0.7, ICRF at 3 MW from 0.7-1.35 seconds. Adding Ne puffing for heat flux managment, increasing Ar.

RESULT: decent target plasma, but got two big Mo injections and ICRF-induced density rise.

NEXT: adjust the strike points, move inner strike higher to avoid heat flux on the corner, move Ne puffing earlier

Aug 21 2012 01:21:31:303PM 1120821018 Matt Reinke repeat of target with tweaked shaping and gasing

RESULT: got rid of injections, moved inner footprint up a tile but outboard footprint is riding high. Lots of outgassing from ICRF

NEXT: RXL change, repeat, trying to get the density control

Aug 21 2012 01:35:00:870PM 1120821019 Matt Reinke converging on good target shot for calibration

RESULT: killer Mo injection after 1.0 seconds

NEXT: reduce ICRF to 2.5 MW and increase Ne to 45%

Aug 21 2012 01:39:19:357PM 1120821020 Matt Reinke RESULT: post-disruption fizzle

NEXT: repeat

Aug 21 2012 02:15:44:927PM 1120821022 Matt Reinke RESULT: Excellent target shot. Perhaps the disruption helped to outgas the walls? Getting better nl04 control. This makes a good 1st shot in the focusing scan.

NEXT: 2nd point in focus scan (see HIREX entries)

Aug 21 2012 02:42:45:503PM 1120821023 Matt Reinke 2nd focal point

RESULT: good plasam, density a little higher

NEXT: adjust HIREXSR for 3rd focal point

Aug 21 2012 02:41:58:863PM 1120821024 Matt Reinke 3rd focus data point

RESULT: HIREXSR did not trigger, ran test shots afterwards and it worked OK

NEXT: Repeat 3rd focal point

Aug 21 2012 02:53:02:970PM 1120821025 Matt Reinke trying for 3rd data point again

RESULT: got the 3rd focal point

NEXT: repeat at 4th focal point

Aug 21 2012 03:04:53:923PM 1120821026 Matt Reinke repeat target at 4th focal point

RESULT: good Ar 4th point, but bad LBO. Mark fixing the shot

NEXT: the x4 points are good enough to get the Ar focus, so we'll set Ar to best focus and get the 4th focal point for LBO

Aug 21 2012 03:29:12:960PM 1120821027 Matt Reinke H-like Ar at best focus

RESULT: excellent repeat

NEXT: start H-like Ar masking test, try for 4th H-like Ca focal point

Aug 21 2012 03:40:34:940PM 1120821028 Matt Reinke first H-like Ar mask point, 4th H-like Ca focal point

RESULT: excellent shot

NEXT: get A-SIDE mask of H-like Ar and repeat of 3rd H-like Ca focus

Aug 21 2012 03:50:58:337PM 1120821029 Matt Reinke RESULT: good repeat

NEXT: might be a few minutes, something wrong with TORVAC

Aug 21 2012 04:42:16:960PM 1120821030 Matt Reinke RESULT: managed to repeat L-mode target after long wait

NEXT: Flipped H-like mask, last H-like Ca focal point

Aug 21 2012 04:59:28:327PM 1120821031 Matt Reinke last L-mode target shot

RESULT: good repeat of target, but the H-like Ca got bumped so didn't get the focal point

NEXT: attempt at locked mode

Aug 21 2012 05:12:17:057PM 1120821032 Matt Reinke locked mode target with seeding out of H-BOT.

RESULT: way too much Ar, throughput similar for forward field shot, good to know for future use. Looking at 1120210004 (forward), a 150 ms from H-BOT was used while on 1110317006 (rev.) H-BOT was at 50 ms.

NEXT: end of run

Physics Operator Comments

Aug 21 2012 09:00:18:853AM Ian Hutchinson Set H-bottom PG5 Ar puff to 40ms.
Set Ip to 0.8MA.
nl04 is already at .6e20. Decrease proportional gain to 3 from 5.
Load.
I'm told that its nebar of .6 they want. Set nl04 to .35e20.
Load.

Aug 21 2012 09:24:42:480AM 1120821001 Ian Hutchinson No power shot because of hang

Aug 21 2012 09:28:28:610AM 1120821002 Ian Hutchinson Plasma to rampdown. nl04 way too high because of big segment 1 puff.

Cut off seg1 puff at 30ms.
Load.

Aug 21 2012 09:48:11:140AM 1120821003 Ian Hutchinson Plasma to rampdown. Still too much density though no puff throughout shot.

Shorten pre-puff to end at 15ms.
Load.

Aug 21 2012 09:55:15:107AM 1120821004 Ian Hutchinson Plasma. Density still high and trickling up.

Try for earlier diversion. Move clearin ramp, rcur ramp, to end at .2s.
ICEF4 to +1300A from +1290A.
Load.

Aug 21 2012 10:21:51:410AM 1120821005 Ian Hutchinson Plasma. Lower density

Move the clearin/rcur ramp to end earlier.
Match zcur at segment switch.
Move rcur out 2mm to .663m
Load.

Aug 21 2012 10:26:55:560AM 1120821006 Ian Hutchinson Plasma.

Raise zxl during 0.1-0.25s
Set fill puff to 25ms from 23ms.
Load.

Aug 21 2012 10:47:22:187AM 1120821007 Ian Hutchinson Plasma.

zxl raised from -.01 to -.005 during flat top.
also raised to +.03 at .1s and gain step moved to .14s.
Load.

Aug 21 2012 10:59:11:883AM 1120821008 Ian Hutchinson Plasma. Density gets down to nl04=.28 and gas puff comes on.

EF1Vs negative ramp begun at .16s instead of step at .2s.
Load.

Aug 21 2012 11:15:09:290AM 1120821009 Ian Hutchinson Plasma.

EF1V adjustments did not do what I wanted.
The only other big jump at .2s is EF4V. Maybe that's it.
Program EF1Vs positive from .15s.
Make EF4V ramp down starting .2s.
Load.
Draw nl04 at .3e20

Aug 21 2012 11:31:07:080AM 1120821010 Ian Hutchinson Fizzle. Bounce and vertical problem.

ICEF4 to +1310A.

Aug 21 2012 11:49:03:097AM 1120821011 Ian Hutchinson Plasma. Density too low.

nl04 to .38e20
Discover it's the EF1 crowbar at .2s.
Move crowbar to .17s. Remove EF1V ramp.
Load.

Aug 21 2012 12:02:49:660PM 1120821012 Ian Hutchinson Plasma.

ICEF4 to +1320A.
Ip to 0.6MA
EF1 crowbar to .15s
Load.

Aug 21 2012 12:15:56:280PM 1120821013 Ian Hutchinson Plasma. Repetitive LH trips.

EF1 crowbar to .125s.
Load.

Aug 21 2012 12:25:25:890PM 1120821014 Ian Hutchinson Plasma. Similar trips. Good early diversion.

Rcur moved in 1.5mm to .6615m.
Rxl moved out during .1-.25s.

Aug 21 2012 12:39:22:337PM 1120821015 Ian Hutchinson Plasma.

EF1 crowbar to .12s.
Rcur to .66m (1.5mm more).
Load.

Aug 21 2012 12:53:49:167PM 1120821016 Ian Hutchinson Plasma.

Ip to 1.1MA.
nl04 to .7e20
PG5 H-bottom puff to 60ms.
PG1 Puff (Ne) 40V from .5 to .7s.
Load.

Aug 21 2012 01:14:04:250PM 1120821017 Ian Hutchinson Plasma. Disrupts at .6MA in ramp down.

Reduce the clearin ramp rate a factor of 3 in rampdown.

zxl to +.01 from -.005m. rxl lowered 3mm.
PG1 earlier .45 to .65
Load.

Aug 21 2012 01:25:31:510PM 1120821018 Ian Hutchinson Plasma. Ramps down further but encounters vertical instability.

Greatly reduce the rcur inwards motion in rampdown.
Move rxl in 5mm.
Raise zcur to 0 from -.009.
Ramp Rcur out more quickly at .17s. More slowly at .1
Load.

Aug 21 2012 01:37:43:720PM 1120821019 Ian Hutchinson Plasma disrupts at 1.03s. A brick. Arc seen on the cameras.

Halve clearin at .1 to -.015 from -.03 because the elongation is being
transiently forced down at segment switch.
Ne puff to 45V.

Aug 21 2012 01:54:52:733PM 1120821020 Ian Hutchinson Fizzle.

Clearin to -.002 at .16s.
ICEF4 to +1330A.
Load.

Aug 21 2012 02:04:46:863PM 1120821021 Ian Hutchinson Fizzle.

ICEF4 to +1340A
Load.

Aug 21 2012 02:17:17:563PM 1120821022 Ian Hutchinson Plasma to rampdown.

Lower Ip demand at .1s from 600 to 500kA closer to what we actually get.

Aug 21 2012 02:41:15:213PM 1120821023 Ian Hutchinson Plasma to rampdown.
Substantially reduced the OH2 thrash at segment switch

Remove later rcur inward motion in ramp-down.
Clearin to -.015 at .1s
OH1V more gradually to zero after 1.8s.

Aug 21 2012 02:42:59:217PM 1120821024 Ian Hutchinson Plasma.

Lower rcur gain to 6 at seg switch.

Aug 21 2012 03:17:26:057PM 1120821026 Ian Hutchinson Plasma.

Rcur in segment 1 to .657 at .1s. This is further out than the corresponding
point in segment 2 (.65) but the offset is much different -3500 in seg 1.

Aug 21 2012 03:35:08:690PM 1120821027 Ian Hutchinson Plasma. This shot shows the voltage step on OH1/2 at .1s was due to Rcur
mismatch across the segment switch caused by the offset in segment 1.
This now kludged as fixed by the mismatch in Rcur demand.

Tweaked the .1-.2s period for improved vertical stability.
Load.

Aug 21 2012 04:17:57:840PM 1120821028 Ian Hutchinson Plasma. No really stability improvement.

Aug 21 2012 04:35:34:233PM 1120821029 Ian Hutchinson Plasma. Followed by a vacuum problem.

Copy seg 2 to seg 3.
Seg 3 changes: Ip to .8MA. nl05 to .5 then negative at 0.7s.
Zero wire 9 b21proj. Set Acoil current (in all Vs) to 4000 .5-1.6s.

Aug 21 2012 04:55:03:237PM 1120821030 Ian Hutchinson Plasma.

Tweak clearin at .16s. Load.

Aug 21 2012 05:02:47:607PM 1120821031 Ian Hutchinson Plasma.

Locked mode shot.
Turn off seg 2. Turn on seg 3.
Disable valves: B-side lower
PG5 puff 100 from .3 to .45s. Loads of Argon.

Aug 21 2012 05:06:03:547PM 1120821032 Ian Hutchinson Plasma. Disrupts at .47s. Seems to be a radiative death. Probably due to Argon
excess.

Engineering Operator Comments

Shot Time Type Status Comment

2 09:13:51:663AM Plasma Ok

3 09:26:23:777AM Plasma Ok

4 09:39:52:087AM Plasma Ok

5 09:53:08:470AM Plasma Ok

6 10:10:50:887AM Plasma Ok

7 10:24:40:070AM Plasma Ok

8 10:39:16:273AM Plasma Ok

9 10:52:55:153AM Plasma Ok

10 11:12:35:743AM Plasma Ok

11 11:25:34:433AM Plasma Ok

12 11:40:27:497AM Plasma Ok

13 11:54:42:497AM Plasma Ok

14 12:08:00:487PM Plasma Ok

15 12:21:32:390PM Plasma Ok

16 12:34:49:217PM Plasma Ok

17 12:51:22:983PM Plasma Ok

18 01:07:11:837PM Plasma Ok

19 01:23:13:137PM Plasma Ok

20 01:36:45:980PM Plasma Ok

21 01:49:47:533PM Plasma Ok

22 02:02:13:563PM Plasma Ok

23 02:15:19:393PM Plasma Ok

24 02:28:48:250PM Plasma Ok

25 02:41:53:123PM Plasma Ok

26 02:55:35:923PM Plasma Ok

27 03:13:16:767PM Plasma Ok

28 03:28:43:983PM Plasma Ok

29 03:41:16:837PM Plasma Ok

30 04:32:04:440PM Plasma Ok

31 04:44:46:697PM Plasma Ok

32 04:59:26:770PM Plasma Ok

System Availability

Aug 21 2012 08:57:30:530AM

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

Session Leader Comments
Aug 21 2012 09:20:59:537AM	1120821001	Greg Wallace	LH at 120 kW/klystron, 90 deg CCD phasing. Fired at t=0, not t=0.8-1.0. Density much higher than requested. Next shot will have correct timing of LH pulse.
Aug 21 2012 09:38:07:967AM	1120821003	Greg Wallace	One fault during LH pulse at 120 kW/klystron, 90 deg CCD phasing, ~500 kW net. Looks like it might be breakdown on the plasma side (spike on refco on many columns at same time). Next shot will increase pulse length to 0.7-1.2 s at same power level of 120 kW/klystron, 90 deg CCD phasing. Also keep trying to decrease density.
Aug 21 2012 09:48:21:477AM	1120821004	Greg Wallace	Clean LH pulse at 120 kW/klystron, 90 deg CCD phasing, ~500 kW net. Density still quite high, nebar ~ 1.25e20. Next shot will increase LH power to 150 kW/klystron and try to decrease density again.
Aug 21 2012 10:03:42:270AM	1120821005	Greg Wallace	Many LH faults due to high reflections. Line averaged density finally came down which also reduced LH probe density. Next shot will decrease outer gap by 4 mm to improve LH coupling. Also move launcher in from 1279 to 1278.
Aug 21 2012 10:23:06:033AM	1120821006	Greg Wallace	One LH fault at 150 kW/klystron, 90 deg CCD, ~625 kW net. Looks like it could be breakdown in col 3. Nothing obvious on the LH camera. Launcher seems to have crept in to 1277. Will move back slightly to 1278. Next shot will repeat at this power level.
Aug 21 2012 10:32:03:363AM	1120821007	Greg Wallace	One fault in LH pulse at 150 kW/klystron, 90 deg CCD phasing, ~625 kW net power. Fault occurs at 0.97 s, can be seen on frame 29 of LH camera. Looks like breakdown on plasma side C-row. Will stay at this power level to see if it clears.
Aug 21 2012 10:47:15:723AM	1120821008	Greg Wallace	Clean LH pulse at 150 kW/klystron, 90 deg CCD phasing, ~625 kW net. Strong current drive early in LH pulse, but density rises during pulse from 4e19 to 8e19. About 50% loop voltage reduction by the end of the pulse. Next shot will go up to 170 kW/klystron and hope density doesn't rise so much.
Aug 21 2012 11:13:28:570AM	1120821009	Greg Wallace	One fault near end of the LH pulse at 170 kW/klystron, 90 deg CCD phasing, ~725 kW net power. Nothing obvious on LH camera but clearly plasma side breakdown looking at the reflected power signals. Next shot will repeat with this power to see if it clears up. Clear signs of current drive in this discharge.
Aug 21 2012 11:17:04:010AM	1120821010	Greg Wallace	Fizzle.
Aug 21 2012 11:33:04:397AM	1120821011	Greg Wallace	Many faults. Density too low at edge (nebar < 4e19!!!) for coupling. Next shot will increase line averaged density which should improve coupling.
Aug 21 2012 11:49:31:007AM	1120821012	Greg Wallace	Two faults, looks like an arc on col 2? Will stay at this power level for now. Next shot will decrease to 600 kA.
Aug 21 2012 12:03:11:137PM	1120821013	Greg Wallace	Many faults due to breakdown on the plasma side at 170 kW/klystron, 90 deg CCD phasing, 800 kW net power. Next shot will reduce to 150 kW/klystron to see if things improve.
Aug 21 2012 12:16:47:650PM	1120821014	Greg Wallace	More faulting at 150 kW/klystron, 90 deg CCD phasing. Seems to not really like the 600 kA discharge. Could be "broader" SOL profiles at the lower current? Next shot will increase outer gap by 3mm (reduce heat flux on launcher) and move timing to 0.8-1.3 s (avoid crossover in early part of LH pulse).
Aug 21 2012 12:29:39:787PM	1120821015	Greg Wallace	Several faults at 150 kW/klystron, 90 deg CCD. Still breaking down on the plasma side. Better than shot 14---bigger gap seemed to help. Next shot will increase outer gap by another 3mm.
Aug 21 2012 12:40:01:420PM	1120821016	Greg Wallace	Much better with the larger outer gap. Only two faults. Still looks like breakdown on plasma side, maybe col 2 or 3? 150 kW/klystron, 90 deg CCD phasing, ~725 kW net. Sustained Vloop near 0.15 V. Last shot of the day for MP 605.
Aug 21 2012 01:06:31:070PM	1120821017	Matt Reinke	Transitioning over the MP 662 - HIREXSR Calibration. First goal is to setup a repeatable ICRF-heated L-mode plasma for use in diagnostic configuration changes. LSN, Ip=1.1, nl04~0.7, ICRF at 3 MW from 0.7-1.35 seconds. Adding Ne puffing for heat flux managment, increasing Ar. RESULT: decent target plasma, but got two big Mo injections and ICRF-induced density rise. NEXT: adjust the strike points, move inner strike higher to avoid heat flux on the corner, move Ne puffing earlier
Aug 21 2012 01:21:31:303PM	1120821018	Matt Reinke	repeat of target with tweaked shaping and gasing RESULT: got rid of injections, moved inner footprint up a tile but outboard footprint is riding high. Lots of outgassing from ICRF NEXT: RXL change, repeat, trying to get the density control
Aug 21 2012 01:35:00:870PM	1120821019	Matt Reinke	converging on good target shot for calibration RESULT: killer Mo injection after 1.0 seconds NEXT: reduce ICRF to 2.5 MW and increase Ne to 45%
Aug 21 2012 01:39:19:357PM	1120821020	Matt Reinke	RESULT: post-disruption fizzle NEXT: repeat
Aug 21 2012 02:15:44:927PM	1120821022	Matt Reinke	RESULT: Excellent target shot. Perhaps the disruption helped to outgas the walls? Getting better nl04 control. This makes a good 1st shot in the focusing scan. NEXT: 2nd point in focus scan (see HIREX entries)
Aug 21 2012 02:42:45:503PM	1120821023	Matt Reinke	2nd focal point RESULT: good plasam, density a little higher NEXT: adjust HIREXSR for 3rd focal point
Aug 21 2012 02:41:58:863PM	1120821024	Matt Reinke	3rd focus data point RESULT: HIREXSR did not trigger, ran test shots afterwards and it worked OK NEXT: Repeat 3rd focal point
Aug 21 2012 02:53:02:970PM	1120821025	Matt Reinke	trying for 3rd data point again RESULT: got the 3rd focal point NEXT: repeat at 4th focal point
Aug 21 2012 03:04:53:923PM	1120821026	Matt Reinke	repeat target at 4th focal point RESULT: good Ar 4th point, but bad LBO. Mark fixing the shot NEXT: the x4 points are good enough to get the Ar focus, so we'll set Ar to best focus and get the 4th focal point for LBO
Aug 21 2012 03:29:12:960PM	1120821027	Matt Reinke	H-like Ar at best focus RESULT: excellent repeat NEXT: start H-like Ar masking test, try for 4th H-like Ca focal point
Aug 21 2012 03:40:34:940PM	1120821028	Matt Reinke	first H-like Ar mask point, 4th H-like Ca focal point RESULT: excellent shot NEXT: get A-SIDE mask of H-like Ar and repeat of 3rd H-like Ca focus
Aug 21 2012 03:50:58:337PM	1120821029	Matt Reinke	RESULT: good repeat NEXT: might be a few minutes, something wrong with TORVAC
Aug 21 2012 04:42:16:960PM	1120821030	Matt Reinke	RESULT: managed to repeat L-mode target after long wait NEXT: Flipped H-like mask, last H-like Ca focal point
Aug 21 2012 04:59:28:327PM	1120821031	Matt Reinke	last L-mode target shot RESULT: good repeat of target, but the H-like Ca got bumped so didn't get the focal point NEXT: attempt at locked mode
Aug 21 2012 05:12:17:057PM	1120821032	Matt Reinke	locked mode target with seeding out of H-BOT. RESULT: way too much Ar, throughput similar for forward field shot, good to know for future use. Looking at 1120210004 (forward), a 150 ms from H-BOT was used while on 1110317006 (rev.) H-BOT was at 50 ms. NEXT: end of run

Physics Operator Comments
Aug 21 2012 09:00:18:853AM		Ian Hutchinson	Set H-bottom PG5 Ar puff to 40ms. Set Ip to 0.8MA. nl04 is already at .6e20. Decrease proportional gain to 3 from 5. Load. I'm told that its nebar of .6 they want. Set nl04 to .35e20. Load.
Aug 21 2012 09:24:42:480AM	1120821001	Ian Hutchinson	No power shot because of hang
Aug 21 2012 09:28:28:610AM	1120821002	Ian Hutchinson	Plasma to rampdown. nl04 way too high because of big segment 1 puff. Cut off seg1 puff at 30ms. Load.
Aug 21 2012 09:48:11:140AM	1120821003	Ian Hutchinson	Plasma to rampdown. Still too much density though no puff throughout shot. Shorten pre-puff to end at 15ms. Load.
Aug 21 2012 09:55:15:107AM	1120821004	Ian Hutchinson	Plasma. Density still high and trickling up. Try for earlier diversion. Move clearin ramp, rcur ramp, to end at .2s. ICEF4 to +1300A from +1290A. Load.
Aug 21 2012 10:21:51:410AM	1120821005	Ian Hutchinson	Plasma. Lower density Move the clearin/rcur ramp to end earlier. Match zcur at segment switch. Move rcur out 2mm to .663m Load.
Aug 21 2012 10:26:55:560AM	1120821006	Ian Hutchinson	Plasma. Raise zxl during 0.1-0.25s Set fill puff to 25ms from 23ms. Load.
Aug 21 2012 10:47:22:187AM	1120821007	Ian Hutchinson	Plasma. zxl raised from -.01 to -.005 during flat top. also raised to +.03 at .1s and gain step moved to .14s. Load.
Aug 21 2012 10:59:11:883AM	1120821008	Ian Hutchinson	Plasma. Density gets down to nl04=.28 and gas puff comes on. EF1Vs negative ramp begun at .16s instead of step at .2s. Load.
Aug 21 2012 11:15:09:290AM	1120821009	Ian Hutchinson	Plasma. EF1V adjustments did not do what I wanted. The only other big jump at .2s is EF4V. Maybe that's it. Program EF1Vs positive from .15s. Make EF4V ramp down starting .2s. Load. Draw nl04 at .3e20
Aug 21 2012 11:31:07:080AM	1120821010	Ian Hutchinson	Fizzle. Bounce and vertical problem. ICEF4 to +1310A.
Aug 21 2012 11:49:03:097AM	1120821011	Ian Hutchinson	Plasma. Density too low. nl04 to .38e20 Discover it's the EF1 crowbar at .2s. Move crowbar to .17s. Remove EF1V ramp. Load.
Aug 21 2012 12:02:49:660PM	1120821012	Ian Hutchinson	Plasma. ICEF4 to +1320A. Ip to 0.6MA EF1 crowbar to .15s Load.
Aug 21 2012 12:15:56:280PM	1120821013	Ian Hutchinson	Plasma. Repetitive LH trips. EF1 crowbar to .125s. Load.
Aug 21 2012 12:25:25:890PM	1120821014	Ian Hutchinson	Plasma. Similar trips. Good early diversion. Rcur moved in 1.5mm to .6615m. Rxl moved out during .1-.25s.
Aug 21 2012 12:39:22:337PM	1120821015	Ian Hutchinson	Plasma. EF1 crowbar to .12s. Rcur to .66m (1.5mm more). Load.
Aug 21 2012 12:53:49:167PM	1120821016	Ian Hutchinson	Plasma. Ip to 1.1MA. nl04 to .7e20 PG5 H-bottom puff to 60ms. PG1 Puff (Ne) 40V from .5 to .7s. Load.
Aug 21 2012 01:14:04:250PM	1120821017	Ian Hutchinson	Plasma. Disrupts at .6MA in ramp down. Reduce the clearin ramp rate a factor of 3 in rampdown. zxl to +.01 from -.005m. rxl lowered 3mm. PG1 earlier .45 to .65 Load.
Aug 21 2012 01:25:31:510PM	1120821018	Ian Hutchinson	Plasma. Ramps down further but encounters vertical instability. Greatly reduce the rcur inwards motion in rampdown. Move rxl in 5mm. Raise zcur to 0 from -.009. Ramp Rcur out more quickly at .17s. More slowly at .1 Load.
Aug 21 2012 01:37:43:720PM	1120821019	Ian Hutchinson	Plasma disrupts at 1.03s. A brick. Arc seen on the cameras. Halve clearin at .1 to -.015 from -.03 because the elongation is being transiently forced down at segment switch. Ne puff to 45V.
Aug 21 2012 01:54:52:733PM	1120821020	Ian Hutchinson	Fizzle. Clearin to -.002 at .16s. ICEF4 to +1330A. Load.
Aug 21 2012 02:04:46:863PM	1120821021	Ian Hutchinson	Fizzle. ICEF4 to +1340A Load.
Aug 21 2012 02:17:17:563PM	1120821022	Ian Hutchinson	Plasma to rampdown. Lower Ip demand at .1s from 600 to 500kA closer to what we actually get.
Aug 21 2012 02:41:15:213PM	1120821023	Ian Hutchinson	Plasma to rampdown. Substantially reduced the OH2 thrash at segment switch Remove later rcur inward motion in ramp-down. Clearin to -.015 at .1s OH1V more gradually to zero after 1.8s.
Aug 21 2012 02:42:59:217PM	1120821024	Ian Hutchinson	Plasma. Lower rcur gain to 6 at seg switch.
Aug 21 2012 03:17:26:057PM	1120821026	Ian Hutchinson	Plasma. Rcur in segment 1 to .657 at .1s. This is further out than the corresponding point in segment 2 (.65) but the offset is much different -3500 in seg 1.
Aug 21 2012 03:35:08:690PM	1120821027	Ian Hutchinson	Plasma. This shot shows the voltage step on OH1/2 at .1s was due to Rcur mismatch across the segment switch caused by the offset in segment 1. This now kludged as fixed by the mismatch in Rcur demand. Tweaked the .1-.2s period for improved vertical stability. Load.
Aug 21 2012 04:17:57:840PM	1120821028	Ian Hutchinson	Plasma. No really stability improvement.
Aug 21 2012 04:35:34:233PM	1120821029	Ian Hutchinson	Plasma. Followed by a vacuum problem. Copy seg 2 to seg 3. Seg 3 changes: Ip to .8MA. nl05 to .5 then negative at 0.7s. Zero wire 9 b21proj. Set Acoil current (in all Vs) to 4000 .5-1.6s.
Aug 21 2012 04:55:03:237PM	1120821030	Ian Hutchinson	Plasma. Tweak clearin at .16s. Load.
Aug 21 2012 05:02:47:607PM	1120821031	Ian Hutchinson	Plasma. Locked mode shot. Turn off seg 2. Turn on seg 3. Disable valves: B-side lower PG5 puff 100 from .3 to .45s. Loads of Argon.
Aug 21 2012 05:06:03:547PM	1120821032	Ian Hutchinson	Plasma. Disrupts at .47s. Seems to be a radiative death. Probably due to Argon excess.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
2	09:13:51:663AM	Plasma	Ok
3	09:26:23:777AM	Plasma	Ok
4	09:39:52:087AM	Plasma	Ok
5	09:53:08:470AM	Plasma	Ok
6	10:10:50:887AM	Plasma	Ok
7	10:24:40:070AM	Plasma	Ok
8	10:39:16:273AM	Plasma	Ok
9	10:52:55:153AM	Plasma	Ok
10	11:12:35:743AM	Plasma	Ok
11	11:25:34:433AM	Plasma	Ok
12	11:40:27:497AM	Plasma	Ok
13	11:54:42:497AM	Plasma	Ok
14	12:08:00:487PM	Plasma	Ok
15	12:21:32:390PM	Plasma	Ok
16	12:34:49:217PM	Plasma	Ok
17	12:51:22:983PM	Plasma	Ok
18	01:07:11:837PM	Plasma	Ok
19	01:23:13:137PM	Plasma	Ok
20	01:36:45:980PM	Plasma	Ok
21	01:49:47:533PM	Plasma	Ok
22	02:02:13:563PM	Plasma	Ok
23	02:15:19:393PM	Plasma	Ok
24	02:28:48:250PM	Plasma	Ok
25	02:41:53:123PM	Plasma	Ok
26	02:55:35:923PM	Plasma	Ok
27	03:13:16:767PM	Plasma	Ok
28	03:28:43:983PM	Plasma	Ok
29	03:41:16:837PM	Plasma	Ok
30	04:32:04:440PM	Plasma	Ok
31	04:44:46:697PM	Plasma	Ok
32	04:59:26:770PM	Plasma	Ok