Alcator C-Mod Run 1110120 Information

Miniproposals

Miniproposal: 602

Date Filed: 2/26/2010

Title: Core Fluctuations and Transport in Two -Frequency ICRF Heated ITB Plasmas with Jogs and Modulated IC

First Author: Darin Ernst

Session Leader: Darin Ernst (shots 1-30)

Operators
Session leader(s):	Darin Ernst
Physics operator(s):	Greg Wallace
Engineering operator(s):	Bill Cochran,Bill Parkin,Gary Dekow

Engineering Operator Run Comment
automatically entered by signon - please replace with real comment

Session Leader Plans

Entered: Jan 20 2011 09:38:23:933AM

Author: Darin Ernst

Yesterday we had a half-day run with some great ITB's, but only two
successfully controlled with on-axis heating (and they weren't great).
The main problem was the H-Mode back transition that occurred frequently
as the ITB developed (which was rather quick relative to previous runs).
We cranked up J-port off-axis power to 2.4 MW finally, and this helped
us stay in H-Mode. However, we still had D&E preheat on, which prevented
an ITB from forming. We fooled around with Bt, Ip, ne_tgt quite a bit,
with some statistically invalid conclusions.

Today we will adjust Bt, Ip, ne_tgt to favor ITB formation, disregarding
Pth scaling for EDA H-mode (the ITB limits the parameter space well within
EDA). We need to develop a good ITB, then hit it with on-axis power to
control Zeff and Prad so we can stay in H-Mode. Yet we want a very peaked
density before we hit it with on-axis heating.

If we are successful, we may get to do some vertical jogs (Jerry Hughes
suggests downward, since we are close to DN, so upward may be vertically
unstable).

NEXT: Following RF conditioning, repeat shot 1110119033 but with
J-port power 2.4 MW, same as 32. No D&E yet: want to check ITB
development . 40 ms argon. Keep ne_tgt=1.1. Going back to
5.4 T, 0.8 MA.

See how quickly ITB develops and apply on-axis heating accordingly,
in efforts to both control ITB, and keep Prad from blowing
up the H-Mode.

Physics Operators Plans

Entered: Jan 19 2011 05:29:30:327PM

Author: Greg Wallace

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

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

Power systems as on: 1110119033

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

Gas setup:

Fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill B-main (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): YES, overnight (see below)
Overnight ECDC (yes/no): morning, following boronization
ICRF(yes/no): yes
LH(yes/no): no
Cryopump (yes/no): yes, starting with first shot
DNB (yes/no): yes

------------------------------
Boronization and ECDC parameters:
------------------------------

Use same recipe that was employed on 17JAN, 07JAN, and 04JAN:

dP=120psi
pulser .7s on- .3s off
rmin/rdwell/rmax: 44/75/80 cm
tdwell/tsweep: 60/120 s
EF4 current: 0 A

Post boronization ECDC: 3hrs in He
sweep: 44/45/103cm
scan: 20/120 s

------------------------------
Experimental Plan
------------------------------

1. Will begin with continuation of Ernst's run on 1110119. Starting shot will be based on last shot from Wednesday (1110119033). Will make changes as determined by session leader in the morning.

Session Leader Summaries

Entered: Jan 20 2011 09:03:17:550AM

Author: Darin Ernst

Some RF conditioning shots...following boronization.

Entered: Jan 20 2011 09:20:03:820AM

Author: Darin Ernst

Some RF conditioning shots...following boronization.

NEXT: Following RF conditioning, repeat shot 1110119033 but with
J-port power 2.4 MW, same as 32. No D&E yet: want to check ITB
development . 40 ms argon. Keep ne_tgt=1.1. Going back to
5.4 T, 0.8 MA.

See how quickly ITB develops and apply on-axis heating accordingly,
in efforts to both control ITB, and keep Prad from blowing
up the H-Mode.

Physics Operator Summaries

Session Leader Comments

Jan 20 2011 10:03:27:930AM 1110120005 Darin Ernst Steve Wukitch suggests lowering target density from 1.1 to 1.0:
neutral pressure is too high at J port. Typical following boronization.

Luis and Nathan injecting Ca at 1.5 sec. to see if they can observe
Te perturbation (any immediate core response -- nonlocal effect?)

Jan 20 2011 01:23:45:447PM 1110120015 Darin Ernst J-port coming back, still a little glitchy, but got three H-Modes with moderate
ITB's, with ITB on 1st reaching ne0 ~ 4. Back transitions are consistent with
GPC Te8 dropping below 0.216 keV.

Jan 20 2011 01:40:48:657PM 1110120016 Darin Ernst J still faulting, but 1st H-Mode terminated by an injection at 1.00 sec.
Moderate ITB ne0~3.7. Nathan Howard, looking at spectrograms, thinks
it may have been Ni early, then Mb. Movie shows antenna lighting up in
a couple of spots, so could be piece of the Ni Faraday screen. Also see
Ti along with it.

Jan 20 2011 01:53:30:613PM 1110120017 Darin Ernst ne0~3.5, GPC Te8 drops starting 0.92s, may have been terminated by J port trip.

Jan 20 2011 02:07:32:140PM 1110120018 Darin Ernst pretty nice ITB at 1.236, ne0~4.3, ne_ped~2.7, injections at 1.05, 1.2 s hammer it down. Looks like J faulted at 1.243 before the back-transition. Getting over 2.5 MW on J.

Nathan: Getting some Cu, Mb, Ni, Fe, not really sudden injections, more of a source.

Jan 20 2011 02:15:34:467PM 1110120018 Darin Ernst RF improving. Got ITB with ne0~4, jump in Prad at 1.38s (not from ITB).
ne_ped ~ 2.5. Clear ITB foot. Saturates by 1.1 sec without any interference
(wolfe).

Jan 20 2011 02:34:25:887PM 1110120018 Darin Ernst Nice clean H-Mode, no back transitions! A few minor J port RF faults.
ITB was steady by about 1.1 sec again, reaching ne0 ~ 4.

Next: Lower J-port power from 2.5 to 2.4 MW to reduce faulting.
Immediate Goal: Increase ITB central density, then apply on-axis pulses.
Going to 5.5 T, since best ITB's yesterday were there.

Jan 20 2011 02:47:14:047PM 1110120021 Darin Ernst No RF faults. Nice. Lose sawteeth at 1.17 s, then Te0 starts falling,
but ne0 jumps up to 5.0, and holds. Probably impurity accumulation in ITB.

NEXT: add on-axis power starting 1.2 sec, 1 MW, 40ms on, 60ms off, repeat.

Jan 20 2011 03:03:04:637PM 1110120022 Darin Ernst Late H-Mode.

NEXT: Try raising J power slightly.

DNB will be starting 0.7 sec. with 100 ms period.
D&E ports will start 1.2, 0.8MW, 60ms on, 40 ms off.
DNB is on 40ms, so this will leave 20ms for background frame at end
of each RF pulse.

Jan 20 2011 03:32:45:893PM 1110120024 Darin Ernst Great. Successful control of ITB. However, overdid the on-axis power
a little, so flattened the ITB.

NEXT: cut on-axis power by 50%.

Jan 20 2011 03:42:19:590PM 1110120025 Darin Ernst Late H-Mode 1.15 sec.

Jan 20 2011 03:46:30:323PM 1110120025 Darin Ernst **** We are running again tomorrow ****
**** Will break for C-Mod tour at about 1:30 pm, then resume ****

Jan 20 2011 04:05:43:450PM 1110120026 Darin Ernst Great ne0 > 5 at 1.15 sec., but starts to die just before on-axis RF.
Seems that a couple of injections at 0.5, 1.0 sec contributed to radiative
collapse starting at 1.0 sec. The second injection dropped Te0 suddenly.

NEXT: repeat.

Jan 20 2011 04:44:34:693PM 1110120027 Darin Ernst Hey Jerry -- we got ELMs starting 1.1 sec, slightly before 1st RF trip,
continuously to end. This seems to degrade the ITB. Also, did not
have a very strong ITB. Zeff < 2 entire shot. No sudden increases in Prad.
ne0 hit 4 before beginning to fall.

NEXT: repeat.

Jan 20 2011 04:39:48:890PM 1110120028 Darin Ernst Clean RF, what dreams are made of. ITB: none to speak of: ne0~3.5 and steady.
Late H-Mode delayed ITB.

NEXT: remove first E-port pulse.

Jan 20 2011 04:55:04:467PM 1110120029 Darin Ernst Clean RF, but delayed H-Mode, ITB similar to last time, with ne0 ~ 3.5,
ne_ped ~ 2.5.

Clear ITB foot around 80 cm. Density fairly steady during on-axis heating.
Decreased slightly during on-axis heating. Getting delta-Te0 from on-axis
heating of 0.75 keV on top of 1.75 keV (40% P-P).

So far not seeing strong bursts on PCI during on-axis heating. Probably
need to get the density gradient up so that ne0 > 5.

NEXT: add D preheat 1 MW from 0.6-0.7 sec. and repeat, hoping to get H-mode on time.

Physics Operator Comments

Jan 20 2011 10:31:03:460AM 1110120001 Greg Wallace Changes: Load shot 1110119033. Increase toroidal field to 5.4 T (150 kA TF bus current).

Result: Plasma to rampdown. RF having trouble after boronization.

Next shot: Add 40 ms Ar puff. Continue RF conditioning.

Jan 20 2011 10:31:11:980AM 1110120002 Greg Wallace Changes: Add 40 ms Ar puff. Continue RF conditioning.

Result: RF a little better on this shot. Disruption in rampdown at 500 kA. Gas scopes look funny---B-top puff at -.5 s shows up on B-main scope trace???

Next shot: Decrease Ip to 800 kA. Continue RF conditioning.

Jan 20 2011 10:31:23:183AM 1110120003 Greg Wallace Changes: Decrease Ip to 800 kA. Continue RF conditioning.

Result: Plasma. Disruption in rampdown at 400 kA. RF still having issues with boronization recovery. Gas scopes look normal again.

Next shot: Repeat. Continue RF conditioning.

Jan 20 2011 10:31:32:113AM 1110120004 Greg Wallace Changes: Repeat. Continue RF conditioning.

Result: Fizzle. Plasma bounced. Pressure and fields look same as shot 3. Will try again before tweaking gas or fields.

Next shot: Repeat, without the fizzle this time.

Jan 20 2011 10:31:42:027AM 1110120005 Greg Wallace Changes: Repeat, without the fizzle this time.

Result: Plasma. Disruption in rampdown at 500 kA. Still a little bounce. Will keep watching it.

Next shot: Reduce programmed nl_04 from 1.1e20 to 1.0e20 to avoid J-port neutral pressure limit.

Jan 20 2011 10:31:51:507AM 1110120006 Greg Wallace Changes: Reduce programmed nl_04 from 1.1e20 to 1.0e20 to avoid J-port neutral pressure limit.

Result: Plasma. Another bounce. Time to change something in seg 1.

Next shot: Increase PG4 puff by 4 ms (now set to 57 ms).

Jan 20 2011 10:30:31:357AM 1110120007 Greg Wallace Changes: Increase PG4 puff by 4 ms (now set to 57 ms).

Result: Plasma. Bounce in startup again. Pressure is slightly higher but didn't help. Looks like it's time to play with the fields.

Next shot: Increase IC_EF4U by 10 A (from -1300 to -1290) for t < 0.

Jan 20 2011 10:49:28:903AM 1110120008 Greg Wallace Changes: Increase IC_EF4U by 10 A (from -1300 to -1290) for t < 0.

Result: Plasma. Disruption in rampdown at 500 kA. Early bounce (at 15 ms) went away with change in IC_EF4U programming, but now something funny happens at 40 ms. J-port still having issues with boronization recovery.

Next shot: Continue RF conditioning.

Jan 20 2011 11:11:38:920AM 1110120009 Greg Wallace Changes: Continue RF conditioning.

Result: Plasma. Disruption in rampdown at 500 kA. Funny behavior again at 30 ms.

Next shot: Continue RF conditioning. Increase Ar puff from 40 to 45 ms.

Jan 20 2011 11:57:08:200AM 1110120010 Greg Wallace Changes: Continue RF conditioning. Increase Ar puff from 40 to 45 ms.

Result: Plasma. Still having RF problems. Power room access to investigate RF transmitters.

Next shot: Increase Ar puff from 45 ms to 50 ms.

Jan 20 2011 12:23:33:570PM 1110120011 Greg Wallace Changes: Increase Ar puff from 45 ms to 50 ms.

Result: Plasma. Disruption in rampdown at 600 kA. Still having problems with J-port. Another power room access to investigate.

Next shot: Decrease Ar puff from 50 ms to 35 ms.

Jan 20 2011 12:42:52:533PM 1110120012 Greg Wallace Changes: Decrease Ar puff from 50 ms to 35 ms.

Result: Later bounce at 40 ms. Plasma shut down due to runaways. No ratiomatic on this shot so can't see what happened to the pressure with long delay between shots.

Next shot: Try again. See what happens.

Jan 20 2011 12:56:00:097PM 1110120013 Greg Wallace Changes: Try again. See what happens.

Result: Fizzle. Pressure looks OK, Bz0 is OK or even a tad above what worked on previous shots (i.e. 11). Unknown cause. Try again.

Next shot: Try, try again.

Jan 20 2011 01:06:24:347PM 1110120014 Greg Wallace Changes: Try, try again.

Result: Plasma. Still some problems with J-port.

Next shot: Repeat. Continue RF conditioning.

Jan 20 2011 01:15:29:297PM 1110120015 Greg Wallace Changes: Repeat. Continue RF conditioning.

Result: Startup looks good. Three H-modes.

Next shot: Increase Ar puff from 35 ms to 40 ms. Continue RF conditioning.

Jan 20 2011 01:30:57:317PM 1110120016 Greg Wallace Changes: No changes. Continue RF conditioning.

Result: Plasma. Two or three H-modes? J-port is starting to look better.

Next shot: Repeat. Continue RF conditioning.

Jan 20 2011 01:43:36:010PM 1110120017 Greg Wallace Changes: Repeat. Continue RF conditioning.

Result: Plasma. Disruption in rampdown at 500 kA. Two H-modes? J-port starts off well then begins tripping around .9 s.

Next shot: Repeat. Continue RF conditioning.

Jan 20 2011 01:59:45:920PM 1110120018 Greg Wallace Changes: Repeat. Continue RF conditioning.

Result: Plasma. Sustained H-mode until RF trip at 1.25 s.

Next shot: Repeat. Continue RF conditioning.

Jan 20 2011 02:14:46:420PM 1110120019 Greg Wallace Changes: Repeat. Continue RF conditioning.

Result: Plasma. Steady H-mode until 1.4 s. RF is looking better.

Next shot: Repeat. Continue RF conditioning.

Jan 20 2011 02:35:55:047PM 1110120020 Greg Wallace Changes: Repeat. Continue RF conditioning.

Result: Plasma. RF looking much better.

Next shot: Increase TF from 5.4 to 5.5 T (TF current from 150 to 152.7 kA).

Jan 20 2011 02:44:59:610PM 1110120021 Greg Wallace Changes: Increase TF from 5.4 to 5.5 T (TF current from 150 to 152.7 kA).

Result: Plasma. Clean RF trace. Drop in stored energy and Te after sawteeth stabilize at 1.2 s. Breakdown was a little late on shot 20 but moved back to more normal time on this shot. TF was slightly higher than anticipated (5.53 T).

Next shot: No DPCS changes. Will start RF modulation on D&E at 1.2 s. J will hopefully remain steady.

Jan 20 2011 03:05:44:023PM 1110120022 Greg Wallace Changes: No DPCS changes. Will start RF modulation on D&E at 1.2 s. J will hopefully remain steady.

Result: Plasma. A couple RF trips but pretty good.

Next shot: Repeat. Change RF timing slightly.

Jan 20 2011 03:40:16:387PM 1110120023 Greg Wallace Changes: Repeat. Change RF timing slightly.

Result: Dud. EF1 commutation fault.

Next shot: Repeat.

Jan 20 2011 03:44:13:967PM 1110120024 Greg Wallace Changes: Repeat.

Result: Plasma. H-mode starts late.

Next shot: Repeat.

Jan 20 2011 04:06:01:023PM 1110120026 Greg Wallace Changes: Repeat.

Result: Plasma.

Next shot: Repeat.

Jan 20 2011 04:22:02:210PM 1110120027 Greg Wallace Changes: Repeat.

Result: Plasma. Breakdown is creeping later (7-8 ms). Also current rise slows after 30 ms but not sure why.

Next shot: Decrease IC_EF4U from -1290 to -1293 A for t < 0 to address later breakdown.

Jan 20 2011 04:49:27:547PM 1110120028 Greg Wallace Changes: Decrease IC_EF4U from -1290 to -1293 A for t < 0 to address later breakdown.

Result: Plasma. Breakdown slightly earlier. Current ramp looks good. Clean ICRF and good H-mode.

Next shot: Repeat.

Jan 20 2011 05:00:16:390PM 1110120029 Greg Wallace Changes: Repeat.

Result: Plasma. H-mode starts a little late. Clean RF.

Next shot: Repeat.

Jan 20 2011 05:03:04:920PM 1110120030 Greg Wallace Changes: Repeat.

Result: Plasma. Got the H-mode.

Last shot of the day.

Engineering Operator Comments

Shot Time Type Status Comment

1 09:00:36:513AM Plasma Ok

2 09:13:14:517AM Plasma Ok

3 09:28:14:280AM Plasma Ok

4 09:41:56:390AM Plasma Ok

5 09:54:30:330AM Plasma Ok

6 10:08:42:440AM Plasma Ok

7 10:23:30:790AM Plasma Ok

8 10:40:05:443AM Plasma Ok

9 10:54:38:467AM Plasma Ok

10 11:12:01:050AM Plasma Ok

11 11:57:34:257AM Plasma Ok

12 12:27:39:423PM Plasma Ok

13 12:42:21:227PM Plasma Ok

14 12:55:57:923PM Plasma Ok

15 01:08:28:750PM Plasma Ok

16 01:21:43:043PM Plasma Ok

17 01:34:53:453PM Plasma Ok

18 01:49:36:983PM Plasma Ok

19 02:05:14:060PM Plasma Ok

20 02:21:05:850PM Plasma Ok

21 02:36:31:557PM Plasma Ok

22 02:52:30:333PM Plasma Ok

23 03:08:30:890PM Plasma Bad EF1U Early Commutation

24 03:21:48:197PM Plasma Ok

25 03:37:23:683PM Plasma Ok

26 03:53:45:610PM Plasma Ok

27 04:09:35:677PM Plasma Ok

28 04:25:54:000PM Plasma Ok

29 04:43:01:067PM Plasma Ok

30 04:59:29:050PM Plasma Ok

System Availability

Jan 20 2011 09:00:20:860AM

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 no 1/3/11 - turbo pump failure, offline until repaired. Raw spectra stored but not line brightness time histories are going into the tree yet. Jan 03 2011 12:52PM (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

Jan 20 2011 10:54:27:553AM

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
Jan 20 2011 10:03:27:930AM	1110120005	Darin Ernst	Steve Wukitch suggests lowering target density from 1.1 to 1.0: neutral pressure is too high at J port. Typical following boronization. Luis and Nathan injecting Ca at 1.5 sec. to see if they can observe Te perturbation (any immediate core response -- nonlocal effect?)
Jan 20 2011 01:23:45:447PM	1110120015	Darin Ernst	J-port coming back, still a little glitchy, but got three H-Modes with moderate ITB's, with ITB on 1st reaching ne0 ~ 4. Back transitions are consistent with GPC Te8 dropping below 0.216 keV.
Jan 20 2011 01:40:48:657PM	1110120016	Darin Ernst	J still faulting, but 1st H-Mode terminated by an injection at 1.00 sec. Moderate ITB ne0~3.7. Nathan Howard, looking at spectrograms, thinks it may have been Ni early, then Mb. Movie shows antenna lighting up in a couple of spots, so could be piece of the Ni Faraday screen. Also see Ti along with it.
Jan 20 2011 01:53:30:613PM	1110120017	Darin Ernst	ne0~3.5, GPC Te8 drops starting 0.92s, may have been terminated by J port trip.
Jan 20 2011 02:07:32:140PM	1110120018	Darin Ernst	pretty nice ITB at 1.236, ne0~4.3, ne_ped~2.7, injections at 1.05, 1.2 s hammer it down. Looks like J faulted at 1.243 before the back-transition. Getting over 2.5 MW on J. Nathan: Getting some Cu, Mb, Ni, Fe, not really sudden injections, more of a source.
Jan 20 2011 02:15:34:467PM	1110120018	Darin Ernst	RF improving. Got ITB with ne0~4, jump in Prad at 1.38s (not from ITB). ne_ped ~ 2.5. Clear ITB foot. Saturates by 1.1 sec without any interference (wolfe).
Jan 20 2011 02:34:25:887PM	1110120018	Darin Ernst	Nice clean H-Mode, no back transitions! A few minor J port RF faults. ITB was steady by about 1.1 sec again, reaching ne0 ~ 4. Next: Lower J-port power from 2.5 to 2.4 MW to reduce faulting. Immediate Goal: Increase ITB central density, then apply on-axis pulses. Going to 5.5 T, since best ITB's yesterday were there.
Jan 20 2011 02:47:14:047PM	1110120021	Darin Ernst	No RF faults. Nice. Lose sawteeth at 1.17 s, then Te0 starts falling, but ne0 jumps up to 5.0, and holds. Probably impurity accumulation in ITB. NEXT: add on-axis power starting 1.2 sec, 1 MW, 40ms on, 60ms off, repeat.
Jan 20 2011 03:03:04:637PM	1110120022	Darin Ernst	Late H-Mode. NEXT: Try raising J power slightly. DNB will be starting 0.7 sec. with 100 ms period. D&E ports will start 1.2, 0.8MW, 60ms on, 40 ms off. DNB is on 40ms, so this will leave 20ms for background frame at end of each RF pulse.
Jan 20 2011 03:32:45:893PM	1110120024	Darin Ernst	Great. Successful control of ITB. However, overdid the on-axis power a little, so flattened the ITB. NEXT: cut on-axis power by 50%.
Jan 20 2011 03:42:19:590PM	1110120025	Darin Ernst	Late H-Mode 1.15 sec.
Jan 20 2011 03:46:30:323PM	1110120025	Darin Ernst	** We are running again tomorrow Will break for C-Mod tour at about 1:30 pm, then resume **
Jan 20 2011 04:05:43:450PM	1110120026	Darin Ernst	Great ne0 > 5 at 1.15 sec., but starts to die just before on-axis RF. Seems that a couple of injections at 0.5, 1.0 sec contributed to radiative collapse starting at 1.0 sec. The second injection dropped Te0 suddenly. NEXT: repeat.
Jan 20 2011 04:44:34:693PM	1110120027	Darin Ernst	Hey Jerry -- we got ELMs starting 1.1 sec, slightly before 1st RF trip, continuously to end. This seems to degrade the ITB. Also, did not have a very strong ITB. Zeff < 2 entire shot. No sudden increases in Prad. ne0 hit 4 before beginning to fall. NEXT: repeat.
Jan 20 2011 04:39:48:890PM	1110120028	Darin Ernst	Clean RF, what dreams are made of. ITB: none to speak of: ne0~3.5 and steady. Late H-Mode delayed ITB. NEXT: remove first E-port pulse.
Jan 20 2011 04:55:04:467PM	1110120029	Darin Ernst	Clean RF, but delayed H-Mode, ITB similar to last time, with ne0 ~ 3.5, ne_ped ~ 2.5. Clear ITB foot around 80 cm. Density fairly steady during on-axis heating. Decreased slightly during on-axis heating. Getting delta-Te0 from on-axis heating of 0.75 keV on top of 1.75 keV (40% P-P). So far not seeing strong bursts on PCI during on-axis heating. Probably need to get the density gradient up so that ne0 > 5. NEXT: add D preheat 1 MW from 0.6-0.7 sec. and repeat, hoping to get H-mode on time.

Physics Operator Comments
Jan 20 2011 10:31:03:460AM	1110120001	Greg Wallace	Changes: Load shot 1110119033. Increase toroidal field to 5.4 T (150 kA TF bus current). Result: Plasma to rampdown. RF having trouble after boronization. Next shot: Add 40 ms Ar puff. Continue RF conditioning.
Jan 20 2011 10:31:11:980AM	1110120002	Greg Wallace	Changes: Add 40 ms Ar puff. Continue RF conditioning. Result: RF a little better on this shot. Disruption in rampdown at 500 kA. Gas scopes look funny---B-top puff at -.5 s shows up on B-main scope trace??? Next shot: Decrease Ip to 800 kA. Continue RF conditioning.
Jan 20 2011 10:31:23:183AM	1110120003	Greg Wallace	Changes: Decrease Ip to 800 kA. Continue RF conditioning. Result: Plasma. Disruption in rampdown at 400 kA. RF still having issues with boronization recovery. Gas scopes look normal again. Next shot: Repeat. Continue RF conditioning.
Jan 20 2011 10:31:32:113AM	1110120004	Greg Wallace	Changes: Repeat. Continue RF conditioning. Result: Fizzle. Plasma bounced. Pressure and fields look same as shot 3. Will try again before tweaking gas or fields. Next shot: Repeat, without the fizzle this time.
Jan 20 2011 10:31:42:027AM	1110120005	Greg Wallace	Changes: Repeat, without the fizzle this time. Result: Plasma. Disruption in rampdown at 500 kA. Still a little bounce. Will keep watching it. Next shot: Reduce programmed nl_04 from 1.1e20 to 1.0e20 to avoid J-port neutral pressure limit.
Jan 20 2011 10:31:51:507AM	1110120006	Greg Wallace	Changes: Reduce programmed nl_04 from 1.1e20 to 1.0e20 to avoid J-port neutral pressure limit. Result: Plasma. Another bounce. Time to change something in seg 1. Next shot: Increase PG4 puff by 4 ms (now set to 57 ms).
Jan 20 2011 10:30:31:357AM	1110120007	Greg Wallace	Changes: Increase PG4 puff by 4 ms (now set to 57 ms). Result: Plasma. Bounce in startup again. Pressure is slightly higher but didn't help. Looks like it's time to play with the fields. Next shot: Increase IC_EF4U by 10 A (from -1300 to -1290) for t < 0.
Jan 20 2011 10:49:28:903AM	1110120008	Greg Wallace	Changes: Increase IC_EF4U by 10 A (from -1300 to -1290) for t < 0. Result: Plasma. Disruption in rampdown at 500 kA. Early bounce (at 15 ms) went away with change in IC_EF4U programming, but now something funny happens at 40 ms. J-port still having issues with boronization recovery. Next shot: Continue RF conditioning.
Jan 20 2011 11:11:38:920AM	1110120009	Greg Wallace	Changes: Continue RF conditioning. Result: Plasma. Disruption in rampdown at 500 kA. Funny behavior again at 30 ms. Next shot: Continue RF conditioning. Increase Ar puff from 40 to 45 ms.
Jan 20 2011 11:57:08:200AM	1110120010	Greg Wallace	Changes: Continue RF conditioning. Increase Ar puff from 40 to 45 ms. Result: Plasma. Still having RF problems. Power room access to investigate RF transmitters. Next shot: Increase Ar puff from 45 ms to 50 ms.
Jan 20 2011 12:23:33:570PM	1110120011	Greg Wallace	Changes: Increase Ar puff from 45 ms to 50 ms. Result: Plasma. Disruption in rampdown at 600 kA. Still having problems with J-port. Another power room access to investigate. Next shot: Decrease Ar puff from 50 ms to 35 ms.
Jan 20 2011 12:42:52:533PM	1110120012	Greg Wallace	Changes: Decrease Ar puff from 50 ms to 35 ms. Result: Later bounce at 40 ms. Plasma shut down due to runaways. No ratiomatic on this shot so can't see what happened to the pressure with long delay between shots. Next shot: Try again. See what happens.
Jan 20 2011 12:56:00:097PM	1110120013	Greg Wallace	Changes: Try again. See what happens. Result: Fizzle. Pressure looks OK, Bz0 is OK or even a tad above what worked on previous shots (i.e. 11). Unknown cause. Try again. Next shot: Try, try again.
Jan 20 2011 01:06:24:347PM	1110120014	Greg Wallace	Changes: Try, try again. Result: Plasma. Still some problems with J-port. Next shot: Repeat. Continue RF conditioning.
Jan 20 2011 01:15:29:297PM	1110120015	Greg Wallace	Changes: Repeat. Continue RF conditioning. Result: Startup looks good. Three H-modes. Next shot: Increase Ar puff from 35 ms to 40 ms. Continue RF conditioning.
Jan 20 2011 01:30:57:317PM	1110120016	Greg Wallace	Changes: No changes. Continue RF conditioning. Result: Plasma. Two or three H-modes? J-port is starting to look better. Next shot: Repeat. Continue RF conditioning.
Jan 20 2011 01:43:36:010PM	1110120017	Greg Wallace	Changes: Repeat. Continue RF conditioning. Result: Plasma. Disruption in rampdown at 500 kA. Two H-modes? J-port starts off well then begins tripping around .9 s. Next shot: Repeat. Continue RF conditioning.
Jan 20 2011 01:59:45:920PM	1110120018	Greg Wallace	Changes: Repeat. Continue RF conditioning. Result: Plasma. Sustained H-mode until RF trip at 1.25 s. Next shot: Repeat. Continue RF conditioning.
Jan 20 2011 02:14:46:420PM	1110120019	Greg Wallace	Changes: Repeat. Continue RF conditioning. Result: Plasma. Steady H-mode until 1.4 s. RF is looking better. Next shot: Repeat. Continue RF conditioning.
Jan 20 2011 02:35:55:047PM	1110120020	Greg Wallace	Changes: Repeat. Continue RF conditioning. Result: Plasma. RF looking much better. Next shot: Increase TF from 5.4 to 5.5 T (TF current from 150 to 152.7 kA).
Jan 20 2011 02:44:59:610PM	1110120021	Greg Wallace	Changes: Increase TF from 5.4 to 5.5 T (TF current from 150 to 152.7 kA). Result: Plasma. Clean RF trace. Drop in stored energy and Te after sawteeth stabilize at 1.2 s. Breakdown was a little late on shot 20 but moved back to more normal time on this shot. TF was slightly higher than anticipated (5.53 T). Next shot: No DPCS changes. Will start RF modulation on D&E at 1.2 s. J will hopefully remain steady.
Jan 20 2011 03:05:44:023PM	1110120022	Greg Wallace	Changes: No DPCS changes. Will start RF modulation on D&E at 1.2 s. J will hopefully remain steady. Result: Plasma. A couple RF trips but pretty good. Next shot: Repeat. Change RF timing slightly.
Jan 20 2011 03:40:16:387PM	1110120023	Greg Wallace	Changes: Repeat. Change RF timing slightly. Result: Dud. EF1 commutation fault. Next shot: Repeat.
Jan 20 2011 03:44:13:967PM	1110120024	Greg Wallace	Changes: Repeat. Result: Plasma. H-mode starts late. Next shot: Repeat.
Jan 20 2011 04:06:01:023PM	1110120026	Greg Wallace	Changes: Repeat. Result: Plasma. Next shot: Repeat.
Jan 20 2011 04:22:02:210PM	1110120027	Greg Wallace	Changes: Repeat. Result: Plasma. Breakdown is creeping later (7-8 ms). Also current rise slows after 30 ms but not sure why. Next shot: Decrease IC_EF4U from -1290 to -1293 A for t < 0 to address later breakdown.
Jan 20 2011 04:49:27:547PM	1110120028	Greg Wallace	Changes: Decrease IC_EF4U from -1290 to -1293 A for t < 0 to address later breakdown. Result: Plasma. Breakdown slightly earlier. Current ramp looks good. Clean ICRF and good H-mode. Next shot: Repeat.
Jan 20 2011 05:00:16:390PM	1110120029	Greg Wallace	Changes: Repeat. Result: Plasma. H-mode starts a little late. Clean RF. Next shot: Repeat.
Jan 20 2011 05:03:04:920PM	1110120030	Greg Wallace	Changes: Repeat. Result: Plasma. Got the H-mode. Last shot of the day.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:00:36:513AM	Plasma	Ok
2	09:13:14:517AM	Plasma	Ok
3	09:28:14:280AM	Plasma	Ok
4	09:41:56:390AM	Plasma	Ok
5	09:54:30:330AM	Plasma	Ok
6	10:08:42:440AM	Plasma	Ok
7	10:23:30:790AM	Plasma	Ok
8	10:40:05:443AM	Plasma	Ok
9	10:54:38:467AM	Plasma	Ok
10	11:12:01:050AM	Plasma	Ok
11	11:57:34:257AM	Plasma	Ok
12	12:27:39:423PM	Plasma	Ok
13	12:42:21:227PM	Plasma	Ok
14	12:55:57:923PM	Plasma	Ok
15	01:08:28:750PM	Plasma	Ok
16	01:21:43:043PM	Plasma	Ok
17	01:34:53:453PM	Plasma	Ok
18	01:49:36:983PM	Plasma	Ok
19	02:05:14:060PM	Plasma	Ok
20	02:21:05:850PM	Plasma	Ok
21	02:36:31:557PM	Plasma	Ok
22	02:52:30:333PM	Plasma	Ok
23	03:08:30:890PM	Plasma	Bad	EF1U Early Commutation
24	03:21:48:197PM	Plasma	Ok
25	03:37:23:683PM	Plasma	Ok
26	03:53:45:610PM	Plasma	Ok
27	04:09:35:677PM	Plasma	Ok
28	04:25:54:000PM	Plasma	Ok
29	04:43:01:067PM	Plasma	Ok
30	04:59:29:050PM	Plasma	Ok