Alcator C-Mod Run 1110405 Information

Miniproposals

Miniproposal: 647

Date Filed: 1/27/2011

Title: Evaluation of MSE issues

First Author: Steve Scott

Session Leader: Steve Scott (shots 23-26)

Miniproposal: 659

Date Filed: 2/7/2011

Title: LHCD using moderate density plasmas in a single pass absorption regime

First Author: Syunichi Shiraiwa

Session Leader: Syunichi Shiraiwa (shots 1-22)

Operators
Session leader(s):	Syunichi Shiraiwa,Steve Scott
Physics operator(s):	Jim Irby,Robert Granetz
Engineering operator(s):	Bill Cochran,Bill Parkin,Bill Byford

Engineering Operator Run Comment
MP659 - LHCD using moderate density plasmas in a single pass absorption

Session Leader Plans

Entered: Apr 5 2011 07:46:22:113AM

Author: Syunichi Shiraiwa

Shot plan for 1110405 (=this plan is same as 0404)
MP659 LHCD using moderate density plasmas in a single pass absorption regime

Setup)
He4 overnight ECDC
LH2 : setup the same protection system configuration as previous high N// experiments
Run from 9am to 6pm

Step1) Target plasma development (3-5shot)
Reload 1100210012 (ne04 = 0.5). Increase the density to 0.4 and remove D antena
from ICRF pulse. Change Gas puff setting to use He4. Segment 1 need to be adjusted for a breakdown with He4

Step2) Apply LHCD to the target plasma
LH power level = 300 -500 kW
LH timing = from 0.7 s to 1.2 s
Phasing 90, 105, 120, 135, 150 (each 100ms)
If 150 deg turns out to be too tough, we will use 145 deg.

Step3) If step2 is successfully done, we
change target plasma density (ne04 = 0.3-0.4e20, 0.8e20) and repeat
step2.

Special request for diagnostics
Between-shot HXR data analysis based on the revised PHA routine (-> Orso, Ian)
MC position check using PCI (-> PCI team)

Assuming each density takes 5 shots. total will be 5*4=20 shots including the target development

Entered: Apr 5 2011 04:17:36:730PM

Author: Steve Scott

Microproposal to assess neutral full-energy DNB current

Timing: last 2-3 shots of the day.

High-level summary: inject the DNB (in DEUTERIUM) into an Ohmic deuterium plasma, Lower single null, 5.2 Tesla, 1.0 MA with a density ramp from NeL_04 = 0.5 --> 1.2 e20. Repeat same shot a few times.

Segment-2 reference shot: 1110114026. Changes:

#1: Impose a density ramp. at t=0.3 seconds, NeL_04 = 0.5e20. Ramp linearly to NeL_04 = 1.2 e20 at t=1.5 seconds.

#2 Cryopump = off

#3 Set duration of argon puff to 100 ms

Segment-1 reference shot: 1110329038. Changes:

#1 Adjust prepuff for cryopump-off conditions (I suggest 25-30 ms, but physOp can do what he deems best).

DNB timing: start time = 0.50 sec. 80 ms on, 20 ms off. 10 pulses.

Required hardware: DNB in deuterium

Required diagnostics: Thomson, neutron detectors, single-chord VB.

Desirable but not essential diagnostics: HIREX, ECE, TCI, UT spectroscopy (to monitor evolution of helium density), bolometers.

Comment: this microproposal will follow an extended operational period in helium. We anticipate that there may be some contamination of the plasma with residual helium.

Physics Operators Plans

Session Leader Summaries

Entered: Apr 6 2011 09:29:09:373AM

Author: Steve Scott

Summary of Microproposal to characterize DNB full-energy current

This was a successful run. We injected the long-pulse diagnostic neutral beam into an otherwise Ohmic plasma in a density ramp from 0.5 to 1.2 e20 m^-2. By varying the density, we vary the deposition profile of the beam. We will compare the measured neutron rate to TRANSP calculations.

Good shots are 24 and 26. Shot 24 had about 7 good DNB pulses (80 ms on, 20 ms off) and shot 26 got all 10 DNB pulses.

A small complication to this expt is that it followed a long period of operation in helium, so there may be some helium contamination of the plasma, leading to dilution of the target deuterium density. We can get an estimate of the deuterium density by comparing the measured neutron rate during DNB-off periods to TRANSP calculations that use the ion temperature measured by HIREX. We provided an argon puff to get good HIREX measurements of Ti.

Thanks to all concerned for staying late to make this experiment possible.

Entered: Apr 9 2011 06:18:49:357PM

Author: Syunichi Shiraiwa

Summary of MP549
LHCD using moderate density plasmas in a single pass absorption regime

Run starts 8am, and we obtained full length He4 plasma from the first attempted
discharge (shot 3).
ICRF worked well smoothly expect for a repeatable trip due to drop of
power line voltage.
In the first few shots, the central temperature was about 4keV.
After shot 4, we increased plasma current to 1.2 MA in order to increase
Te, which increase Te0 to 4-5keV.
These plasmas had a bit higher density than I used in modeling, but we chose
to stay at a given density and to spend time on adjusting LHCD, since we knew LHCD
coupling is difficult at high phasing.
Although we were not able to eliminate trips from LHCD completely, we obtained
clean transition from the lowest phasing to the highest phasing which can be
used to evaluate the first order effect of phasing.

After getting this discharge, we lowed a target density to obtain a discharge
with modeled density. However, after shot 14, the breakdown became very
difficult probably due to He4.
We tried increasing pre-puff and even tried to breakdown in D2, but neither
worked really well.

Nonetheless, we found a interesting phenomena on these plasmas, We observed
strong non-thermal emission and HXR emission. Those are clearly higher then
what was observed in a previous experiments using the same density.
The following in the summary of HXR emission based on the past 3 years of experiments.

Probably, this is a very good result, but at present it is not clear why the emission
is so high. Many things are different from other discharges and we are working on data analysis.

Physics Operator Summaries

Entered: Apr 6 2011 12:52:46:290PM

Author: Jim Irby

Following a couple of gas tests to get pg3 running again, we had good results running at 8T in helium (both prefill and main gas) until shot 14 when we began a string of duds. Two were caused by problems with the EF1 commutation bank (8, 18). Others were related to fill pressure and our use of helium as the startup gas. Following the dud on shot 14, I increased the gas by 3 ms increments until we got a plasma again on shot 16 which unfortunately disrupted. Shot 17 was another dud, but it was not clear if it was a gas problem or a disruption recovery problem. On shot 20 we gave up on the helium prefill and switched to D2, which had a hard x-ray shutdown. On shot 21 we added more gas, but I put in the wrong timing for the pg3 seg 1 puff, so we had another x-ray shutdown. Shot 22 disrupted at 0.3 s, probably because of injections.

We switched to the MSE microproposal starting on shot 23. Bob Granetz
became phsop.

Score:

gas tests 1,2
duds 8,14,15,17,18
fizzles 19
plasma 3,4,5,6,7,8,9,10,11,12,13,16,20,21,22

Session Leader Comments

Apr 5 2011 08:22:17:430AM 1110405003 Syunichi Shiraiwa First attempt to make a plasma.
Density request is 0.5

Full length. LH started tripping in the second section.
No power from J-port
Density decreased continuously.

Next:
Change the ICRF pulse timing.
No DNB
Reduce outer gap by 3mm.

Apr 5 2011 09:01:10:997AM 1110405004 Syunichi Shiraiwa Full length

LH coupling seems better but still tripping.
Te ~ 4keV.

ECE06 is good for monitoring non-thermal ECE (thanks, Amanda)

Next:
Request Ip 1.2MW
Increase ICRF power
Reduce outer gap by 3mm

Apr 5 2011 09:15:55:967AM 1110405005 Syunichi Shiraiwa Full length
Te 4.5 - 5 keV
Injection at 0.9s

Apr 5 2011 10:05:52:870AM 1110405006 Syunichi Shiraiwa Full length
Te 4.5 - 5 keV

E trips around 1s
LH 3rd and 4th pulse went well.
Non thermal on ECE and HXR is clrear at ne_bar~1.3
We need the last phasing data.

Next: No change in PCS. Adjust ICRF and LH for more stable injection

Apr 5 2011 10:17:43:893AM 1110405007 Syunichi Shiraiwa Clean coupling for 1st,2nd,and 3rd pulse

Apr 5 2011 10:39:47:783AM 1110405007 Syunichi Shiraiwa Clean coupling for 1st,2nd,and 3rd pulse.

Next:
shuffle the phase scan order...
adjust LH trip level
Add D power during 0.5 to 0.69s

Apr 5 2011 11:04:10:853AM 1110405008 Syunichi Shiraiwa Dud

EF1 Power Supply issue?
Next: Repeat

Apr 5 2011 11:04:53:040AM 1110405009 Syunichi Shiraiwa Disrupted at 0.6s

Apr 5 2011 11:49:41:580AM 1110405010 Syunichi Shiraiwa Full length but density drops significantly.

Next: Reduce ICRF power

Apr 5 2011 12:21:42:090PM 1110405011 Syunichi Shiraiwa Full length

We got 145deg phasing partly coupled.
Density is slowly decreasing.

Next : Try 7.5e19 density request + a smaller outer gap (by 3mm).

Apr 5 2011 12:56:34:743PM 1110405012 Syunichi Shiraiwa Full length. Good LH coupling.
Density turns out to be a little high, but okey.

Next: No ICRF for comparison

Apr 5 2011 02:13:31:927PM 1110405014 Syunichi Shiraiwa Dud

Apr 5 2011 02:13:25:840PM 1110405015 Syunichi Shiraiwa Dud

Apr 5 2011 02:58:53:597PM 1110405016 Syunichi Shiraiwa half length plasma
disrupted due to injection..?

non-thermal ECE ~ 8keV

Apr 5 2011 04:07:26:900PM 1110405019 Syunichi Shiraiwa Fizzle

Next: Change break-down puff to D2

Apr 5 2011 04:20:11:570PM 1110405020 Syunichi Shiraiwa Early shut down

Apr 6 2011 09:24:55:887AM 1110405023 Steve Scott Switch to "Deuterium-DNB" microproposl

reference shot: 1110114026. 5.2 Tesla, 1.0 MA, LSN.

Impose a density ramp from 0.5 --> 1.2e20 m^-2.

Put argon at 1 PSI in b-side lower. 100 ms puff of Argon.

No RF, no LH. Just DNB firing in deuterium.

No neon.

result: disrupts at about 0.35 sec.

Apr 6 2011 09:25:31:690AM 1110405024 Steve Scott Bob tweaked the early density.

result: Good! full length shot. Got the desired time history of density.

Got 7 of 10 desired DNB pulses; nice modulation of neutrons, slowly decreasing with time, presumably as the electron temperature decreases.

HIREX reports adequate signal.

Next: repeat with no changes.

Apr 6 2011 09:25:59:283AM 1110405025 Steve Scott no-power shot.

Apr 6 2011 09:26:22:663AM 1110405026 Steve Scott result: beautiful shot, all 10 pulses

end of experiment

Physics Operator Comments

Apr 5 2011 07:22:38:687AM Jim Irby Engineering setup for Tuesday 2011/04/05

MP659 - LHCD using moderate density plasmas in a single pass absorption regime

Session leaders: S. Shiraiwa
Physics operator: Irby

Over weekend and Overnight: ECDC in HELIUM and 60 C bake.

Run will start at 08:00 and end at 18:00
NOTE extended run day.

Power systems as on: 1100210012 (1.0 MA, 8.0 T, 0.5e20 m-2, USN)

A-coil configuration: -Dtop +Dbot +Jtop -Jbot; Hybrid enabled (standard
configuration for reversed field)

Gas Setup:
fill B-Top with 6 psi He Hybrid enabled (PG4)
fill B-side lower with 2 psi Ne Hybrid DISABLED (PG1)
leave B-side upper with 15 psi He3 Hybrid enabled (PG2)
fill B-main (C-side) with 40 psi He Hybrid enabled (PG3)
fill H-bottom with 1 psi Ar Hybrid enabled (PG5)
leave NINJA as is

Enable the following gate valves and shutters, assuming no vacuum problems:
ECE, VUV, Z-bolo, HIREX-Sr, B-spectrometer GV, Xeus

Torvac setup: keep gate valves open during pulse

Specific diagnostics: HXR array, TS, ECE (8 T), PCI

------------------------------------------------------------------------------
Boronization: no
Impurity injector: no
ICRF: yes, P <= 6 MW, J at 78 MHz
LH: yes
DNB: not necessary until the last 3 shots of the day; D2 beam!
Cryopump: not to being with; may be needed later in the day
------------------------------------------------------------------------------

Run plan: Load seg 1 and 2 from 1100210012 (8 T shot), but fill fueling
plenae for helium breakdown and plasma operation. He3 puff is
150 ms. Set nl_04 to 0.6e20 m-2. LH will be applied with various
phasings. If successful, density will also be varied.

For the last 3 shots of the day we will switch back to a recent
deuterium ohmic shot (seg 1 = 1110329038, seg 2 = 1110114026) and
fire deuterium beam pulses into it and check the DD neutron rate.

Apr 5 2011 07:33:03:467AM Jim Irby ECDC in helium was successful last night

Apr 5 2011 07:51:38:780AM 1110405001 Jim Irby Gas puff test shot

Ip -1 MA
Bt 8 T/ -224 kA
Density request 0.6e20 /m^2
prepuff from -0.524 to -0.500 s (24 mS)
h-bottom/pg5 Argon from 0.300 to 0.380 s

prepuff but no main gas

Apr 5 2011 07:56:53:683AM 1110405002 Jim Irby nl04 request from 0.6 to 0.5e20 /m^2
loaded

2nd gas test --- looks ok --- plasma next

Apr 5 2011 08:09:43:597AM 1110405003 Jim Irby changes --------------------------------

Try for plasma

results --------------------------------

plasma for 1.8 s --- pulled TF breaker --- junction overtemp

Apr 5 2011 08:54:26:943AM 1110405004 Jim Irby changes --------------------------------

TF start delayed to -1.4 s to fix junction overtemp (trip to 60 C, we got to 61 C last shot)

RCUR from 0.656 to 0.658 m
loaded

results --------------------------------

plasma into rampdown --- breakers ok

Outer gap from 1.788 cm on shot 3 to 1.420 cm on shot 4 --- a little too much

Apr 5 2011 09:10:06:497AM 1110405005 Jim Irby changes --------------------------------

Ip request from 1000 to 1200 kA
RCUR from 0.658 to 0.6595 m (decrease outer gap again by 3 mm)
loaded

results --------------------------------

plasma into rampdown --- 1.2 MA, right gap ok

Apr 5 2011 09:45:51:377AM 1110405006 Jim Irby changes --------------------------------

no DPCS changes

results --------------------------------

Plasma into rampdown

Apr 5 2011 10:50:52:993AM 1110405008 Jim Irby changes --------------------------------

increased PG5 argon puff by 100 ms
increased RCUR by 1 mm --- decrease outer gap by 2 mm
loaded

ICRF D-Port timing changed to reduce loading on HiYard --- need to investigate voltage drop.

results --------------------------------

dud --- EF1 commutation fault

Apr 5 2011 11:48:00:087AM 1110405009 Jim Irby changes --------------------------------

Try again --- no changes

results --------------------------------

disruption

Apr 5 2011 11:48:41:387AM 1110405010 Jim Irby changes --------------------------------

No DPCS changes, but ICRF timing modified

results --------------------------------

plasma into rampdown --- density too low

Apr 5 2011 12:21:26:810PM 1110405011 Jim Irby changes --------------------------------

nl04 request from 0.5 to 0.7e20/m^2

results --------------------------------

plasma into rampdown --- density a little higher

Apr 5 2011 12:45:04:427PM 1110405012 Jim Irby changes --------------------------------

nl04 request from 0.7 to 0.75e20 /m^2
RCUR from 0.6605 to 0.6615 m (decrease outer gap by another 3 mm)
loaded

results --------------------------------

woops --- decreased gap by 2 mm

plasma into rampdown

Apr 5 2011 01:21:59:033PM 1110405013 Jim Irby changes --------------------------------

reduced seg 1 pg3 puff
put a ramp on the density from 0.2 to .5 s
loaded

No ICRF

results --------------------------------

plasma into rampdown

w/o ICRF the plasma got closer to the LH grill --- lots of trips and flashing on video

Apr 5 2011 02:05:38:270PM 1110405014 Jim Irby changes --------------------------------

nl04 request from 0.75 to 0.55e20 /m^2
loaded

results --------------------------------

dud --- fields look ok, gas looks ok

Apr 5 2011 02:26:09:563PM 1110405015 Jim Irby changes --------------------------------

added 3 ms to the prefill
loaded

results --------------------------------

Another dud ---- a little more prepuff indicated, but maybe not enough

Apr 5 2011 02:49:33:483PM 1110405016 Jim Irby changes --------------------------------

prefill increased another 3 ms (30 ms total)
loaded

results --------------------------------

plasma for 1.16 s ---

Apr 5 2011 03:19:21:180PM 1110405017 Jim Irby changes --------------------------------

pg3 prepull reduced
nl04 request dropped before 0.5 s
RCUR increased by 1.5 mm ( 3 mm outer gap reduction )
loaded

helium3 from 0.1 to 0.25 s (was 0.2 to 0.35 s)
loaded

results --------------------------------

dud --- seems to be gas again

Apr 5 2011 03:42:33:170PM 1110405018 Jim Irby changes --------------------------------

prefill from 30 to 35 ms
loaded

results --------------------------------

dud --- ef1u early commutation

Apr 5 2011 04:00:43:637PM 1110405019 Jim Irby changes --------------------------------

fix ef1

no dpcs changes

results --------------------------------

fizzle --- now we think it's too much gas

Apr 5 2011 04:20:22:957PM 1110405020 Jim Irby changes --------------------------------

fill B-top with 6 psi D2 (replace helium)
prefill from -0.525 to -0.500 s (25 ms)
loaded

results --------------------------------

plasma for 0.183 s --- Hard x-ray shutdown --- need more pg3 prepuff?

Apr 5 2011 04:47:15:470PM 1110405021 Jim Irby changes --------------------------------

pg3 prepuff in seg 1 increased to reduce hards (I hope)
loaded

results --------------------------------

plasma for 0.167 s --- phsop error --- pg3 puff too late!

Apr 5 2011 05:04:28:920PM 1110405022 Jim Irby changes --------------------------------

pg3 puff in seg 1 from -0.019 to 0.100 s
loaded

pg4 prefill from 25 to 28 ms
loaded

results --------------------------------

plasma for 0.3 s --- pulled breaker

Apr 5 2011 05:33:49:507PM 1110405023 Robert Granetz
Shot 23 -- Plasma, but disrupted at t=0.36 s due to a big injection. The injection actually caused the density to start rising sharply even before the radiated power starts up. Beam worked normally. Next shot: tweak up the early density programming

Apr 5 2011 05:34:23:137PM 1110405023 Robert Granetz
For shot 23 we're changing to a 3-shot microproposal to check the DNB. We will fire a deuterium DNB into a deuterium plasma. Load seg 2 from 1110114026 (5.2 T, 1.0 MA, LSN) and seg 1 from 1110329038. Adjust seg 1 gas for no cryopump. Adjust seg 2 nl_04 to ramp from 0.5 to 1.2e20 m-2. Change plena gases back to usual setup. Enable DNB gate valve & extract calorimeter. I'll be the physics operator for these final few shots.

Apr 5 2011 05:54:17:903PM 1110405024 Robert Granetz
Shot 24 -- Plasma, full length. 1.0 MA, 5.2 T, 0.6-1.1e20 m-2, LSN. Okay D2 beam pulse. Plenty of 2.5 MeV neutron modulation. Next shot: repeat, no DPCS changes

Apr 5 2011 06:00:25:690PM 1110405025 Robert Granetz
Shot 25 -- No-power cycle because the excitation current never appeared. Next shot: try again

Apr 5 2011 06:04:28:320PM 1110405026 Robert Granetz
Shot 26 -- Plasma, nearly full length. 1.0 MA, 5.2 T, 0.6-1.1e20 m-2, LSN. Good D2 beam pulse. Nice DD neutron signal. End of microproposal; end of run

Engineering Operator Comments

Shot Time Type Status Comment

1 07:46:20:487AM Test Bad Gas Test

2 07:53:20:437AM Test Ok Gas Test

3 08:00:11:527AM Plasma Bad TF Type 1&2 Flt(Junction Temp and IOC)

4 08:30:17:063AM Plasma Ok

5 09:03:04:633AM Plasma Ok

6 09:35:27:850AM Plasma Ok

7 10:07:58:530AM Plasma Ok

8 10:40:23:470AM Plasma Bad EF1U&L Commutation Switch Datalink Flt

9 11:02:28:937AM Plasma Ok

10 11:37:23:387AM Plasma Ok

11 12:09:41:960PM Plasma Ok

12 12:42:01:553PM Plasma Ok

13 01:14:18:093PM Plasma Ok

14 01:47:31:037PM Plasma Ok

15 02:10:15:173PM Plasma Ok

16 02:39:11:747PM Plasma Ok

17 03:12:26:580PM Plasma Ok

18 03:35:24:623PM Plasma Bad EF1 U Commutated early

19 03:55:07:953PM Plasma Ok

20 04:15:50:563PM Plasma Ok

21 04:38:09:720PM Plasma Ok

22 05:00:04:520PM Plasma Ok

23 05:25:19:970PM Plasma Ok

24 05:37:41:870PM Plasma Ok

25 05:50:40:207PM Plasma Bad NO Exitation

26 05:59:29:770PM Plasma Ok

System Availability

Apr 5 2011 07:46:04:167AM

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 vacuum problems fixed, still no wavelength scan - just used as a Mo/Cu/Ni/Fe/Ti monitor. Mar 25 2011 08:25AM (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. Mar 29 2011 08:34AM (ntsujii) Miklos Porkolab Phase Contrast Imaging emd,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 no Starting 1110309xxx all channels were operational. On 1110323018 the 75 RCVR was lost. Mar 25 2011 09:19AM (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
Apr 5 2011 08:22:17:430AM	1110405003	Syunichi Shiraiwa	First attempt to make a plasma. Density request is 0.5 Full length. LH started tripping in the second section. No power from J-port Density decreased continuously. Next: Change the ICRF pulse timing. No DNB Reduce outer gap by 3mm.
Apr 5 2011 09:01:10:997AM	1110405004	Syunichi Shiraiwa	Full length LH coupling seems better but still tripping. Te ~ 4keV. ECE06 is good for monitoring non-thermal ECE (thanks, Amanda) Next: Request Ip 1.2MW Increase ICRF power Reduce outer gap by 3mm
Apr 5 2011 09:15:55:967AM	1110405005	Syunichi Shiraiwa	Full length Te 4.5 - 5 keV Injection at 0.9s
Apr 5 2011 10:05:52:870AM	1110405006	Syunichi Shiraiwa	Full length Te 4.5 - 5 keV E trips around 1s LH 3rd and 4th pulse went well. Non thermal on ECE and HXR is clrear at ne_bar~1.3 We need the last phasing data. Next: No change in PCS. Adjust ICRF and LH for more stable injection
Apr 5 2011 10:17:43:893AM	1110405007	Syunichi Shiraiwa	Clean coupling for 1st,2nd,and 3rd pulse
Apr 5 2011 10:39:47:783AM	1110405007	Syunichi Shiraiwa	Clean coupling for 1st,2nd,and 3rd pulse. Next: shuffle the phase scan order... adjust LH trip level Add D power during 0.5 to 0.69s
Apr 5 2011 11:04:10:853AM	1110405008	Syunichi Shiraiwa	Dud EF1 Power Supply issue? Next: Repeat
Apr 5 2011 11:04:53:040AM	1110405009	Syunichi Shiraiwa	Disrupted at 0.6s
Apr 5 2011 11:49:41:580AM	1110405010	Syunichi Shiraiwa	Full length but density drops significantly. Next: Reduce ICRF power
Apr 5 2011 12:21:42:090PM	1110405011	Syunichi Shiraiwa	Full length We got 145deg phasing partly coupled. Density is slowly decreasing. Next : Try 7.5e19 density request + a smaller outer gap (by 3mm).
Apr 5 2011 12:56:34:743PM	1110405012	Syunichi Shiraiwa	Full length. Good LH coupling. Density turns out to be a little high, but okey. Next: No ICRF for comparison
Apr 5 2011 02:13:31:927PM	1110405014	Syunichi Shiraiwa	Dud
Apr 5 2011 02:13:25:840PM	1110405015	Syunichi Shiraiwa	Dud
Apr 5 2011 02:58:53:597PM	1110405016	Syunichi Shiraiwa	half length plasma disrupted due to injection..? non-thermal ECE ~ 8keV
Apr 5 2011 04:07:26:900PM	1110405019	Syunichi Shiraiwa	Fizzle Next: Change break-down puff to D2
Apr 5 2011 04:20:11:570PM	1110405020	Syunichi Shiraiwa	Early shut down
Apr 6 2011 09:24:55:887AM	1110405023	Steve Scott	Switch to "Deuterium-DNB" microproposl reference shot: 1110114026. 5.2 Tesla, 1.0 MA, LSN. Impose a density ramp from 0.5 --> 1.2e20 m^-2. Put argon at 1 PSI in b-side lower. 100 ms puff of Argon. No RF, no LH. Just DNB firing in deuterium. No neon. result: disrupts at about 0.35 sec.
Apr 6 2011 09:25:31:690AM	1110405024	Steve Scott	Bob tweaked the early density. result: Good! full length shot. Got the desired time history of density. Got 7 of 10 desired DNB pulses; nice modulation of neutrons, slowly decreasing with time, presumably as the electron temperature decreases. HIREX reports adequate signal. Next: repeat with no changes.
Apr 6 2011 09:25:59:283AM	1110405025	Steve Scott	no-power shot.
Apr 6 2011 09:26:22:663AM	1110405026	Steve Scott	result: beautiful shot, all 10 pulses end of experiment

Physics Operator Comments
Apr 5 2011 07:22:38:687AM		Jim Irby	Engineering setup for Tuesday 2011/04/05 MP659 - LHCD using moderate density plasmas in a single pass absorption regime Session leaders: S. Shiraiwa Physics operator: Irby Over weekend and Overnight: ECDC in HELIUM and 60 C bake. Run will start at 08:00 and end at 18:00 NOTE extended run day. Power systems as on: 1100210012 (1.0 MA, 8.0 T, 0.5e20 m-2, USN) A-coil configuration: -Dtop +Dbot +Jtop -Jbot; Hybrid enabled (standard configuration for reversed field) Gas Setup: fill B-Top with 6 psi He Hybrid enabled (PG4) fill B-side lower with 2 psi Ne Hybrid DISABLED (PG1) leave B-side upper with 15 psi He3 Hybrid enabled (PG2) fill B-main (C-side) with 40 psi He Hybrid enabled (PG3) fill H-bottom with 1 psi Ar Hybrid enabled (PG5) leave NINJA as is Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, Z-bolo, HIREX-Sr, B-spectrometer GV, Xeus Torvac setup: keep gate valves open during pulse Specific diagnostics: HXR array, TS, ECE (8 T), PCI ------------------------------------------------------------------------------ Boronization: no Impurity injector: no ICRF: yes, P <= 6 MW, J at 78 MHz LH: yes DNB: not necessary until the last 3 shots of the day; D2 beam! Cryopump: not to being with; may be needed later in the day ------------------------------------------------------------------------------ Run plan: Load seg 1 and 2 from 1100210012 (8 T shot), but fill fueling plenae for helium breakdown and plasma operation. He3 puff is 150 ms. Set nl_04 to 0.6e20 m-2. LH will be applied with various phasings. If successful, density will also be varied. For the last 3 shots of the day we will switch back to a recent deuterium ohmic shot (seg 1 = 1110329038, seg 2 = 1110114026) and fire deuterium beam pulses into it and check the DD neutron rate.
Apr 5 2011 07:33:03:467AM		Jim Irby	ECDC in helium was successful last night
Apr 5 2011 07:51:38:780AM	1110405001	Jim Irby	Gas puff test shot Ip -1 MA Bt 8 T/ -224 kA Density request 0.6e20 /m^2 prepuff from -0.524 to -0.500 s (24 mS) h-bottom/pg5 Argon from 0.300 to 0.380 s prepuff but no main gas
Apr 5 2011 07:56:53:683AM	1110405002	Jim Irby	nl04 request from 0.6 to 0.5e20 /m^2 loaded 2nd gas test --- looks ok --- plasma next
Apr 5 2011 08:09:43:597AM	1110405003	Jim Irby	changes -------------------------------- Try for plasma results -------------------------------- plasma for 1.8 s --- pulled TF breaker --- junction overtemp
Apr 5 2011 08:54:26:943AM	1110405004	Jim Irby	changes -------------------------------- TF start delayed to -1.4 s to fix junction overtemp (trip to 60 C, we got to 61 C last shot) RCUR from 0.656 to 0.658 m loaded results -------------------------------- plasma into rampdown --- breakers ok Outer gap from 1.788 cm on shot 3 to 1.420 cm on shot 4 --- a little too much
Apr 5 2011 09:10:06:497AM	1110405005	Jim Irby	changes -------------------------------- Ip request from 1000 to 1200 kA RCUR from 0.658 to 0.6595 m (decrease outer gap again by 3 mm) loaded results -------------------------------- plasma into rampdown --- 1.2 MA, right gap ok
Apr 5 2011 09:45:51:377AM	1110405006	Jim Irby	changes -------------------------------- no DPCS changes results -------------------------------- Plasma into rampdown
Apr 5 2011 10:50:52:993AM	1110405008	Jim Irby	changes -------------------------------- increased PG5 argon puff by 100 ms increased RCUR by 1 mm --- decrease outer gap by 2 mm loaded ICRF D-Port timing changed to reduce loading on HiYard --- need to investigate voltage drop. results -------------------------------- dud --- EF1 commutation fault
Apr 5 2011 11:48:00:087AM	1110405009	Jim Irby	changes -------------------------------- Try again --- no changes results -------------------------------- disruption
Apr 5 2011 11:48:41:387AM	1110405010	Jim Irby	changes -------------------------------- No DPCS changes, but ICRF timing modified results -------------------------------- plasma into rampdown --- density too low
Apr 5 2011 12:21:26:810PM	1110405011	Jim Irby	changes -------------------------------- nl04 request from 0.5 to 0.7e20/m^2 results -------------------------------- plasma into rampdown --- density a little higher
Apr 5 2011 12:45:04:427PM	1110405012	Jim Irby	changes -------------------------------- nl04 request from 0.7 to 0.75e20 /m^2 RCUR from 0.6605 to 0.6615 m (decrease outer gap by another 3 mm) loaded results -------------------------------- woops --- decreased gap by 2 mm plasma into rampdown
Apr 5 2011 01:21:59:033PM	1110405013	Jim Irby	changes -------------------------------- reduced seg 1 pg3 puff put a ramp on the density from 0.2 to .5 s loaded No ICRF results -------------------------------- plasma into rampdown w/o ICRF the plasma got closer to the LH grill --- lots of trips and flashing on video
Apr 5 2011 02:05:38:270PM	1110405014	Jim Irby	changes -------------------------------- nl04 request from 0.75 to 0.55e20 /m^2 loaded results -------------------------------- dud --- fields look ok, gas looks ok
Apr 5 2011 02:26:09:563PM	1110405015	Jim Irby	changes -------------------------------- added 3 ms to the prefill loaded results -------------------------------- Another dud ---- a little more prepuff indicated, but maybe not enough
Apr 5 2011 02:49:33:483PM	1110405016	Jim Irby	changes -------------------------------- prefill increased another 3 ms (30 ms total) loaded results -------------------------------- plasma for 1.16 s ---
Apr 5 2011 03:19:21:180PM	1110405017	Jim Irby	changes -------------------------------- pg3 prepull reduced nl04 request dropped before 0.5 s RCUR increased by 1.5 mm ( 3 mm outer gap reduction ) loaded helium3 from 0.1 to 0.25 s (was 0.2 to 0.35 s) loaded results -------------------------------- dud --- seems to be gas again
Apr 5 2011 03:42:33:170PM	1110405018	Jim Irby	changes -------------------------------- prefill from 30 to 35 ms loaded results -------------------------------- dud --- ef1u early commutation
Apr 5 2011 04:00:43:637PM	1110405019	Jim Irby	changes -------------------------------- fix ef1 no dpcs changes results -------------------------------- fizzle --- now we think it's too much gas
Apr 5 2011 04:20:22:957PM	1110405020	Jim Irby	changes -------------------------------- fill B-top with 6 psi D2 (replace helium) prefill from -0.525 to -0.500 s (25 ms) loaded results -------------------------------- plasma for 0.183 s --- Hard x-ray shutdown --- need more pg3 prepuff?
Apr 5 2011 04:47:15:470PM	1110405021	Jim Irby	changes -------------------------------- pg3 prepuff in seg 1 increased to reduce hards (I hope) loaded results -------------------------------- plasma for 0.167 s --- phsop error --- pg3 puff too late!
Apr 5 2011 05:04:28:920PM	1110405022	Jim Irby	changes -------------------------------- pg3 puff in seg 1 from -0.019 to 0.100 s loaded pg4 prefill from 25 to 28 ms loaded results -------------------------------- plasma for 0.3 s --- pulled breaker
Apr 5 2011 05:33:49:507PM	1110405023	Robert Granetz	Shot 23 -- Plasma, but disrupted at t=0.36 s due to a big injection. The injection actually caused the density to start rising sharply even before the radiated power starts up. Beam worked normally. Next shot: tweak up the early density programming
Apr 5 2011 05:34:23:137PM	1110405023	Robert Granetz	For shot 23 we're changing to a 3-shot microproposal to check the DNB. We will fire a deuterium DNB into a deuterium plasma. Load seg 2 from 1110114026 (5.2 T, 1.0 MA, LSN) and seg 1 from 1110329038. Adjust seg 1 gas for no cryopump. Adjust seg 2 nl_04 to ramp from 0.5 to 1.2e20 m-2. Change plena gases back to usual setup. Enable DNB gate valve & extract calorimeter. I'll be the physics operator for these final few shots.
Apr 5 2011 05:54:17:903PM	1110405024	Robert Granetz	Shot 24 -- Plasma, full length. 1.0 MA, 5.2 T, 0.6-1.1e20 m-2, LSN. Okay D2 beam pulse. Plenty of 2.5 MeV neutron modulation. Next shot: repeat, no DPCS changes
Apr 5 2011 06:00:25:690PM	1110405025	Robert Granetz	Shot 25 -- No-power cycle because the excitation current never appeared. Next shot: try again
Apr 5 2011 06:04:28:320PM	1110405026	Robert Granetz	Shot 26 -- Plasma, nearly full length. 1.0 MA, 5.2 T, 0.6-1.1e20 m-2, LSN. Good D2 beam pulse. Nice DD neutron signal. End of microproposal; end of run

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	07:46:20:487AM	Test	Bad	Gas Test
2	07:53:20:437AM	Test	Ok	Gas Test
3	08:00:11:527AM	Plasma	Bad	TF Type 1&2 Flt(Junction Temp and IOC)
4	08:30:17:063AM	Plasma	Ok
5	09:03:04:633AM	Plasma	Ok
6	09:35:27:850AM	Plasma	Ok
7	10:07:58:530AM	Plasma	Ok
8	10:40:23:470AM	Plasma	Bad	EF1U&L Commutation Switch Datalink Flt
9	11:02:28:937AM	Plasma	Ok
10	11:37:23:387AM	Plasma	Ok
11	12:09:41:960PM	Plasma	Ok
12	12:42:01:553PM	Plasma	Ok
13	01:14:18:093PM	Plasma	Ok
14	01:47:31:037PM	Plasma	Ok
15	02:10:15:173PM	Plasma	Ok
16	02:39:11:747PM	Plasma	Ok
17	03:12:26:580PM	Plasma	Ok
18	03:35:24:623PM	Plasma	Bad	EF1 U Commutated early
19	03:55:07:953PM	Plasma	Ok
20	04:15:50:563PM	Plasma	Ok
21	04:38:09:720PM	Plasma	Ok
22	05:00:04:520PM	Plasma	Ok
23	05:25:19:970PM	Plasma	Ok
24	05:37:41:870PM	Plasma	Ok
25	05:50:40:207PM	Plasma	Bad	NO Exitation
26	05:59:29:770PM	Plasma	Ok