Alcator C-Mod Run 1080514 Information

Miniproposals

Miniproposal: 501

Date Filed: 7/12/2007

Title: Fluctuations in ITB Plasmas

First Author: Catherine Fiore

Session Leader: Catherine Fiore (shots 1-31)

Operators
Session leader(s):	Catherine Fiore
Physics operator(s):	Robert Granetz
Engineering operator(s):	Bill Parkin,Bill Cochran,Bill Byford

Engineering Operator Run Comment
MP501 Fluctuations during ITB Session leaders: C. Fiore/L. Lin Physics o

Session Leader Plans

Physics Operators Plans

Entered: May 13 2008 09:48:43:687PM

Author: Robert Granetz

Engineering setup for Wednesday 14 May 2008 MP501 Fluctuations during ITB Session leaders: C. Fiore/L. Lin Physics operator: R. Granetz Overnight boronization with standard parameters, followed by the standard ECDC in helium and then deuterium. Run will start at 09:00 and end at 17:00. Power systems as on 1040309023 (Bt=5.4T, Ip=0.9-1 MA, nl04=0.9-1e20 m-2 (Yes, that's correct, the setup shot is from more than 4 years ago.) A-coil configuration: +Dtop -Dbot -Jtop +Jbot; Enabled (standard configuration) 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 7 psi D2 DISABLED Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, Z-bolo Torvac setup: keep gate valves open during PULSE Specific diagnostics: All standard core diagnostics, Reflctometry, TS (Edge and Core), VB, ECE (GPC1 and GPC2), FRCECE, magnetics, MSE, PCI, TCI, Da, HIREX, CXRS ------------------------------------------------------------------------------- ICRF Setup: will need 1-2 MW at 70 MHz starting with shot 1, then 1-2 MW at 80 MHz once ITBs become reproducible LH Setup: not needed DNB: strongly desired Cryopump: not needed ------------------------------------------------------------------------------- Run plan: Set up standard equilibrium with EDA H-modes with 70 Mhz and 5.4 T to obtain ITB ( 1-10 s hots). Attempt to get reproducible EDA H-modes with 1-2 MW ICRF from J-port, which will produce ITBs. Argon will be required for HIREX, but must be used sparingly and discontinued if ITBs don~Rt form. PCI group needs 2-3 similar shots to answer the critical question on the instability propagation and location. It may take 10-15 shots to get 3 good ones. Once ITBs are being formed, determine optimum time to inject 80 Mhz rf: Scan power and/or timing of central heating, checking to be sure that all relevant data has been obtained: 15-20 shots.

Session Leader Summaries

Entered: May 14 2008 05:19:20:787PM

Author: Catherine Fiore

Overall, there was good success at making ITBs with 80 Mhz off-axis ICRF. We
switched to this scenario when we had difficulty bringing up power on the 70
Mhz system. We wer able to get reliable operation out of J-port by mid
afternoon and began using to inject central power into the ITB. PCI got a
number of good shots with fluctuation data, but lost signal by the time the
J-port system started working well.

1080514001 No gas, no plasma.

1080514002 Nice target plasma, but no rf to speak of.

1080514003 Nice target plasma, but no rf to speak of.

1080514004 Nice target plasma, but no rf to speak of.

1080514005 Nice target plasma, but no rf to speak of.

1080514006 Nice target plasma, but no rf to speak of. We are going to try
operation at 4.5 T with 80 Mhz off axis on the HFS to develop a target ITB.
We'll continue to try and bring up J-port at the same time.

1080514007 Nice target plasma, 4.5 T, 0.8 MA, but no rf to speak of.

1080514008 Nice target plasma, 4.5 T, 0.8 MA, but no rf to speak of.

1080514009 Nice target plasma, 4.5 T, 0.8 MA.
rf: 1 MW out of D. We expect bothD and E to be operational next shot.

1080514010 Nice target plasma, 4.5 T, 0.8 MA. 2 MW RF. We'll lower the
target density slightly. It appears to be too high for J- antenna

1080514011 ITB at 1.2 s, despite having only 1 MW RF and an earlier
back transition.

1080514012 Nice ITB 1-1.36 s. J port is coming up slowly.

1080514013 Nice ITB 1-1.36 s.

1080514014 ITB 1.to 1.33 s. From this point we will try to get J-port
power to stabilize the ITB

1080514015 Nice ITB 1.1-1.4 s.

1080514016 Early disruption, injection?

1080514017 ITB despite multiple back transitions. The target density
may be a little low.

1080514019 ITB despite multiple back transitions.

1080514020 ITB despite multiple back transitions.

1080514021 ITB ends in big back transition because of a D-port fault
at 1.25 s

1080514022 ITB ends in big back transition because of a D-port fault at
1.18s. Looks like radiation is becoming an issue

1080514023 ITB, ends in back transition at 1.3 s. J-port 0.4 MW per
request. Request 0.6 MW on the next shot.

1080514024 ITB, ends in back transition at 1.18 s. J-port 0.6 MW.
Repeat with J-port at 1.1 s on the next shot.

1080514025 Really nice ITB, brief arrest with J-port onset, but ends in
back transition at 1.3 s. J-port power will be increased from 0.6 MW to 1 MW.

1080514026 fizzle

1080514027 Really nice ITB but J-port at 1 MW fails to arrest the
density rise. It ends in back transition at 1.2 s. Repeat.

1080514028 Really nice ITB but J-port at 1 MW arrests the density rise
briefly, and then it rises again before ending in a back transition at
1.23 s. Lower J-port power to 0.8 MW.

1080514029 Really nice ITB but J-port at 0.8 MW arrests the density rise
briefly, and then it rises again before ending in a back transition at
1.32 s. Increase J-port power to 1.4 MW.

1080514030 Engineering fault.

1080514031 The plasma was beginning an ITB when the J-port system came on at
1.5 MW and clobbered it.

Physics Operator Summaries

Entered: May 14 2008 05:06:15:200PM

Author: Robert Granetz

Run summary for Wednesday 14 May 2008 MP501 Fluctuations during ITB Session leaders: C. Fiore/L. Lin Physics operator: R. Granetz The machine ran extremely well today with these ITB plasmas. The plan was to use the 70 MHz (J-port) to heat off-axis and get the ITB, and use on-axis heating with the 80 MHz (D&E) to arrest the peaking. As it turns out, the 70 MHz transmitters had lots of problems early on, so we reduced the field to 4.5 T and used the 80 MHz to do off-axis heating on the high-field side to get good ITBs. But many of them collapsed because the density and impurities continued to increase. Eventually we were able to get 2 MW of 70 MHz from J-port, but only for short pulse lengths. The DNB has recovered quite a bit, and we fired into plasmas on a number of shots (1080514024, for example) with beam parameters of 50 kV and 6 A. There were a number of cells accesses, primarily for ICRF and for PCI, and this resulted in a slightly reduced number of shot cycles. Scorecard: 27 plasmas 1 dud (gas valve power malfunctioned) 2 fizzles 0 power supply tests 1 no-power MDS shot cycles -------------- Total: 31 shot cycles

Session Leader Comments

May 14 2008 09:16:29:433AM 1080514001 Catherine Fiore No gas, no plasma.

May 14 2008 03:16:06:613PM 1080514001 Catherine Fiore No gas, no plasma.

May 14 2008 09:27:16:283AM 1080514002 Catherine Fiore Nice target plasma, but no rf to speak of.

May 14 2008 09:42:22:123AM 1080514003 Catherine Fiore Nice target plasma, but no rf to speak of.

May 14 2008 09:51:24:910AM 1080514004 Catherine Fiore Nice target plasma, but no rf to speak of.

May 14 2008 10:07:03:907AM 1080514005 Catherine Fiore Nice target plasma, but no rf to speak of.

May 14 2008 10:38:23:840AM 1080514006 Catherine Fiore Nice target plasma, but no rf to speak of.

We are going to try operation at 4.5 T with 80 Mhz off axis on the LFS to develop a target ITB. We'll continue to try and bring up J-port at the same time.

May 14 2008 10:54:05:350AM 1080514007 Catherine Fiore Nice target plasma, 4.5 T, 0.8 MA, but no rf to speak of. No gate on E, no match on D.

May 14 2008 11:13:46:240AM 1080514008 Catherine Fiore Nice target plasma, 4.5 T, 0.8 MA, but no rf to speak of. E has a fault that won't clear. ICRF group is going in the cell.

May 14 2008 12:07:33:687PM 1080514009 Catherine Fiore Nice target plasma, 4.5 T, 0.8 MA. RF group fixed the problem with E, but it faulted. 1 MW out of D. We expect both to be operational next shot.

May 14 2008 12:17:13:523PM 1080514010 Catherine Fiore Nice target plasma, 4.5 T, 0.8 MA. 2 MW RF. We'll lower the target density slightly. It appears to be too high for J- antenna

May 14 2008 12:34:35:130PM 1080514011 Catherine Fiore ITB at 1.2 s, despite having only 1 MW RF and an earlier back transition.

May 14 2008 12:52:11:817PM 1080514012 Catherine Fiore Nice ITB 1-1.36 s. J port is coming up slowly.

May 14 2008 01:06:50:360PM 1080514013 Catherine Fiore Nice ITB 1-1.36 s.

May 14 2008 03:12:37:423PM 1080514014 Catherine Fiore ITB 1.to 1.33 s. From this point we will try to get J-port power to stabilize the ITB

May 14 2008 03:10:20:173PM 1080514015 Catherine Fiore Nice ITB 1-1.36 s.

May 14 2008 03:11:57:283PM 1080514015 Catherine Fiore ITB 1.1 to 1.4s

May 14 2008 03:10:54:000PM 1080514016 Catherine Fiore Disruption, injection?

May 14 2008 03:13:07:470PM 1080514017 Catherine Fiore ITB despite multiple back transitions. The target density may be a little low.

May 14 2008 03:13:45:317PM 1080514019 Catherine Fiore ITB despite multiple back transitions.

May 14 2008 03:14:10:723PM 1080514020 Catherine Fiore ITB despite multiple back transitions.

May 14 2008 03:04:52:357PM 1080514021 Catherine Fiore ITB ends in big back transition because of a D-port fault at 1.25 s

May 14 2008 03:14:55:113PM 1080514021 Catherine Fiore ITB ends in big back transition because of a D-port fault at 1.25 s

May 14 2008 03:27:34:483PM 1080514022 Catherine Fiore ITB ends in big back transition because of a D-port fault at 1.18s. Looks like radiation is becoming an issue

May 14 2008 03:42:29:960PM 1080514023 Catherine Fiore ITB, ends in back transition at 1.3 s. J-port 0.4 MW per request. Request 0.6 MW on the next shot.

May 14 2008 03:48:25:623PM 1080514024 Catherine Fiore ITB, ends in back transition at 1.18 s. J-port 0.6 MW. Repeat with J-port at 1.1 s on the next shot.

May 14 2008 04:05:09:823PM 1080514025 Catherine Fiore Really nice ITB, brief arrest with J-port onset, but ends in back transition at 1.3 s. J-port 0.6 MW. Repeat with J-port at 1 MW on the next shot.

May 14 2008 04:29:05:623PM 1080514027 Catherine Fiore Really nice ITB but J-port at 1 MW fails to arrest the density rise. It ends in back transition at 1.2 s. Repeat.

May 14 2008 04:41:06:070PM 1080514028 Catherine Fiore Really nice ITB but J-port at 1 MW arrests the density rise briefly, and then it rises again before ending in a back transition at 1.23 s. Lower J-port power to 0.8 MW.

May 14 2008 04:53:21:720PM 1080514029 Catherine Fiore Really nice ITB but J-port at 0.8 MW arrests the density rise briefly, and then it rises again before ending in a back transition at 1.32 s. Increase J-port power to 1.4 MW.

May 14 2008 05:16:15:720PM 1080514031 Catherine Fiore The plasma was just starting to think about forming an ITB when we whacked it with 1.4 MW from J-port and killed the rise. Oh well.

Physics Operator Comments

May 13 2008 10:55:27:097PM Robert Granetz Loaded DPCS from 1080513023 (2nd-to-last shot from Tuesday, with good,
non-cryopump startup.

Loaded seg 2 from 1040309023 seg 2;
'Call'ed all magnetics-dependent estimators (which automatically
zeroed the old offsets in CLEARIN and Ip);
Checked that the non-magnetics-dependent predictors looked reasonable;
Programmed Ip to 0.9 MA;
Programmed Bt to 5.4 T;
Confirmed the nl_04 was already programmed to 1.0e20 m-2.

Note: this old shot doesn't feedback control the error fields

Saved DPCS setup in /home/granetz/pcs_scratch as shot 1080514000

May 14 2008 09:14:44:490AM 1080514001 Robert Granetz Shot 01 -- Dud. No gas. Valves and plena were setup and enabled properly. The 100 volts didn't
turn on. The EIC (Bill Parkin) reports that this glitch has been seen before.

Next shot: try again for plasma; if the valve voltage still doesn't come on, then we'll have to stop
and debug the problem

May 14 2008 09:31:18:880AM 1080514002 Robert Granetz Shot 02 -- Plasma. Good shot. 5.4 T, 0.9 MA, 1.0e20 m-2, lower single null...just want we want.
No ICRF. Yijun says it will take a couple of shots to get the ICRF going.

Next shot: repeat, with RF

May 14 2008 10:02:46:060AM 1080514003 Robert Granetz Shot 03 -- Plasma. Good shot. Still no RF.

Next shot: repeat w/RF

May 14 2008 10:03:25:407AM 1080514004 Robert Granetz Shot 04 -- Plasma. Good shot. J-port is starting to show signs of life (70 MHz).

Next shot: continue getting J-port going.

May 14 2008 10:08:43:207AM 1080514005 Robert Granetz Shot 05 -- Plasma. Good shot. J-port still only spitting.

Next shot: Whereforth are thou, J-port?

May 14 2008 10:45:21:110AM 1080514006 Robert Granetz Shot 06 -- Plasma. Good shot. J-port still not working.

Short cell access after the shot to turn off LHe DNB fill.

Next shot: lower Bt to 4.5 T (124 kA) and Ip to 0.8 MA; turn on D & E (80 MHz) in addition
to J (at 70 MHz); try for ITB with high-field side RF; increase argon pulse
to 60 ms (from 40 ms)

May 14 2008 10:53:00:600AM 1080514007 Robert Granetz Shot 07 -- Plasma. Good shot. 4.5 T, 0.8 MA, 1.0e20 m-2, lower single null. D and J were
on, but negligible power.

Next shot: repeat w/ICRF

May 14 2008 11:13:19:570AM 1080514008 Robert Granetz Shot 08 -- Plasma. Good shot. Still no RF.

Cell and power room access after the shot for RF.

Next shot: repeat w/RF

May 14 2008 12:08:40:313PM 1080514009 Robert Granetz Shot 09 -- Plasma. Good shot. Got 0.9 MW from D. E is spitting. No J. No H-mode.

Next shot: repeat w/RF

May 14 2008 12:21:11:323PM 1080514010 Robert Granetz Shot 10 -- Plasma. Good shot. Prf=2.0 MW (1.0 from D and 1.0 from E). Nothing from J.
No H-mode, since Bt is 4.5 T and the 80 MHz is off-axis.

Next shot: decrease nl_04 to 0.8e20 m-2 (from 1.0e20 m-2)

May 14 2008 12:40:09:480PM 1080514011 Robert Granetz Shot 11 -- Plasma. Good shot. H-modes!! Prf=1 MW (from E only).

Next shot: repeat

May 14 2008 12:49:22:890PM 1080514012 Robert Granetz Shot 12 -- Plasma. Good shot. H-modes. 2 MW at 80 MHz, 0.4 MW at 70 MHz. Catherine says,
there's an ITB.

Next shot: repeat, continue bringing up J-port; add 2 ms to pre-fill

May 14 2008 01:07:08:140PM 1080514013 Robert Granetz Shot 13 -- Plasma. Good shot. Long steady H-mode. Good ITB. Prf=2 MW of 80 MHz and 1.8 MW
of 70 MHz w/faulting.

Next shot: add another 2 ms to pre-fill; fire DNB into plasma on next shot

May 14 2008 01:14:04:693PM 1080514014 Robert Granetz Shot 14 -- Plasma. Disrupted at t=1.4 s; might be due to the ITB impurity buildup, since
the on-axis heating (J-port at 70 MHz) didn't go. DNB fired at 50 kV and 6 A.

Next shot: increase pre-fill by another 2 ms

May 14 2008 01:28:06:563PM 1080514015 Robert Granetz Shot 15 -- Plasma. Disrupted at 1.45 when the ITB collapses. We need J-port on-axis heating
(at 70 MHz) to prevent the buildup and collapse. DNB at 50 kV and 6-6.5 A w/faults.

Next shot: add 1 ms to pre-fill; add 20 ms to argon (to 80 ms)

May 14 2008 01:40:11:243PM 1080514016 Robert Granetz Shot 16 -- Plasma. Disrupted very early. Looks like an injection. Lousy startup.

Next shot: increase RCUR offset in seg 1 to 1500 (from 1000)

May 14 2008 01:57:03:007PM 1080514017 Robert Granetz Shot 17 -- Plasma. Disrupted at t=1.4 s when ITB collapses. Prf=2 MW of 80 MHz, but nothing from
J-port at 70 MHz. Startup is much improved.

Next shot: raise nl_04 to 0.9e20 m-2 (from 0.8e20 m-2)

May 14 2008 02:03:46:230PM 1080514018 Robert Granetz Shot 18 -- Fizzle. All power supplies worked.

Next shot: reduce pre-fill by 3 ms

May 14 2008 02:18:13:600PM 1080514019 Robert Granetz Shot 19 -- Plasma. Good shot. Disrupted during rampdown. Lots of short H-modes.
Core continues to peak, even though the H-modes are transient. J-port is
still having problems.

Next shot: no DPCS changes

May 14 2008 03:05:29:967PM 1080514020 Robert Granetz Shot 20 -- Plasma. Disrupts at 1.43 s when the ITB collapses. Prf=2 MW of 80 MHz, and a short
pulse of 1 MW of 70 MHz.

Cell access after this shot for PCI.

Next shot: no DPCS changes

May 14 2008 03:02:47:540PM 1080514021 Robert Granetz Shot 21 -- Plasma. Good full-length shot. J-port gives a short pulse of 2 MW of 70 MHz.
DNB fired into plasma this time.

Next shot: no DPCS changes

May 14 2008 03:22:45:027PM 1080514022 Robert Granetz Shot 22 -- Plasma. Good shot. J faulted badly.

Next shot: reduce argon puff to 60 ms (from 80 ms)

May 14 2008 03:36:40:753PM 1080514023 Robert Granetz Shot 23 -- Plasma. Good shot. Short pulses of 2 MW from J-port.

Next shot: no DPCS changes

May 14 2008 03:57:06:583PM 1080514024 Robert Granetz Shot 24 -- Plasma. Good shot. Got 1 MA at 70 MHz from J-port for about 0.25 s.
DNB is firing into plasma again...good shot.

Next shot: no DPCS changes

May 14 2008 04:06:41:450PM 1080514025 Robert Granetz Shot 25 -- Plasma. Disrupts at t=1.36 s when the ITB collapses. Good RF from both the
80 MHz and the 70 MHz transmitters.

Next shot: no DPCS changes; increase J-port power to 1 MW

May 14 2008 04:15:06:690PM 1080514026 Robert Granetz Shot 26 -- Fizzle. Inexplicable. Everything looks fine.

Next shot: try again, no changes

May 14 2008 04:30:59:610PM 1080514027 Robert Granetz Shot 27 -- Plasma. Good shot. 1 MW of 70 MHz (J), 2 MW of 80 MHz (D+E). Good DNB too.

Next shot: no DPCS changes

May 14 2008 04:45:54:183PM 1080514028 Robert Granetz Shot 28 -- Plasma. Goood shot. 1 MW of 70 MHz from J; 2 MW of 80 MHz from D+E.

Next shot: no DPCS changes; lithium pellet will be fired during the current rampdown

May 14 2008 04:53:25:237PM 1080514029 Robert Granetz Shot 29 -- Plasma. Disrupted at t=1.43 s after the ITB collapses. 2 MW of 80 MHz; 0.9 MW of 70 MHz.
Good DNB.

Next shot: increase argon puff back to 80 ms

May 14 2008 05:05:32:573PM 1080514030 Robert Granetz Shot 30 -- No-power shot because of a critical power failure during INIT of the RF.

Next shot: try again for the last shot

May 14 2008 05:18:10:693PM 1080514031 Robert Granetz Shot 31 -- Plasma. Disrupted at t=1.66 s during rampdown. Li pellet fired at 1.61 s.
2 MW of 80 MHz; 1.5 MW of 70 MHz. Good DNB.

End of run

Engineering Operator Comments

Shot Time Type Status Comment

1 09:08:19:863AM Plasma Bad NO HV enable for gas

2 09:20:42:230AM Plasma Ok

3 09:35:08:523AM Plasma Ok

4 09:47:41:097AM Plasma Ok

5 10:03:25:610AM Plasma Ok

6 10:19:16:823AM Plasma Ok

7 10:48:19:017AM Plasma Ok

8 11:02:15:437AM Plasma Ok

9 11:57:03:913AM Plasma Ok

10 12:09:54:143PM Plasma Ok

11 12:26:36:843PM Plasma Ok

12 12:39:03:807PM Plasma Ok

13 12:54:18:617PM Plasma Ok

14 01:06:55:250PM Plasma Ok

15 01:19:53:133PM Plasma Ok

16 01:35:47:007PM Plasma Ok

17 01:48:17:860PM Plasma Ok

18 02:00:45:167PM Plasma Ok

19 02:13:24:427PM Plasma Ok

20 02:26:06:780PM Plasma Ok

21 02:55:46:253PM Plasma Ok

22 03:14:57:987PM Plasma Ok

23 03:30:20:360PM Plasma Ok

24 03:43:33:917PM Plasma Ok

25 03:56:28:113PM Plasma Ok

26 04:09:05:827PM Plasma Ok

27 04:21:40:477PM Plasma Ok

28 04:34:13:393PM Plasma Ok

29 04:46:40:107PM Plasma Ok

30 04:59:07:303PM Plasma Bad Critical Power Failure RF

31 05:11:25:220PM Plasma Ok

System Availability

May 14 2008 09:08:11:973AM

System Available Comment Availability
Changed Owner Description Who Can
Change
Active MHD yes Fully operational Mar 28 2007 09:19PM (sears) Joe Snipes Active MHD Antenna sears,snipes
BES yes vertical array of six views at R ~ 87.3 cm, radial array of three views out to R ~ 89 cm, both at outboard midplane. Three discrete fiber views of beam at R ~ 70.0, 76.5 and 82.5 cm. Feb 06 2007 10:00AM (bravenec) Ron Bravenec Beam Emission Spectroscopy bravenec,rowan
Bolometers yes Diode 2pi working fine, foil 2pi being low-pass filtered to remove noise. Outboard miidplane AXUV has a grounded channel which is disrupting the whole array OFFLINE for now. Midplane foils working fine, but need to fill tree with calibrations. 2D AXUV arrays are being digitized but need further debugging and calibration. Mar 14 2008 11:09AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization yes System Operational Apr 29 2008 03:29PM (irby) Jim Irby Boronization dekow,irby
CNPA yes Single channel CNPA available as of 12/1707 Dec 17 2007 05:48PM (parker) Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor yes Cryopump is operational Dec 11 2007 10:13AM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard
CXRS yes The pedestal toroidal array was installed, spatially and absolutely calibrated. There are 10 chords intersect the beam at the major_R_range=[74.2:86.3]cm. Spatial resolution: 1.2 cm. The F-top poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[67.8:91.0]cm. Spatial resolution: 1.22 cm. Nov 27 2007 10:21AM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,rachmcd,rowan
D Alpha yes \ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are available Nov 26 2007 04:23PM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe
Dalsa yes optics repaired, camera re-installed, and view has been re-calibrated Nov 27 2007 09:54AM (marmar) Earl Marmar Visible Bremsstrahlung marmar
Disruption Mitigation no Nov 20 2007 10:47PM (granetz) Robert Granetz Gas Jet granetz,whyte
Divertor IR no Mar 06 2007 10:50AM Glen Wurden Divertor IR Digital Video gwurden,terry
Divertor IR Spectroscopy no Mar 06 2007 10:51AM Glen Wurden Divertor IR Spectroscopy gwurden,terry
DNB no Nov 20 2007 10:47PM (granetz) Robert Granetz Diagnostic Neutral Beam beals,granetz
FRC-ECE yes 16 Channels now working - low freq. side - outer Rmids Feb 19 2008 09:56AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips
G-Side Ratiomatic yes Gauge is operational and calibrated against G-side MKS on shot#1071127002 Nov 27 2007 01:25PM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
GPC yes All 9 channels operational as of new year. Jan 03 2008 09:31AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPC2 yes Most channels operational. Jan 02 2008 12:22PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPI no Neither the Xpt-view nor the midplane-view camera is operational. Nov 26 2007 04:25PM (terry) Jim Terry Gas Puff Imaging terry,zweben
H/D yes Should be operational for the FY08 campaign Nov 27 2007 09:54AM (marmar) Earl Marmar H/D Ratio marmar
Hirex Jr yes Mar 06 2007 08:59AM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr no Be Window has a leak and so the gate valve is closed Nov 23 2007 12:50PM (ince) John Rice High Resolution X-Ray ince,rice
HXR yes Something might be wrong with channel 26; all others working fine. Mar 23 2007 10:43AM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt
ICRF D-Antenna yes available (quarter-wave transformer for pre-matching) Dec 11 2007 09:01AM (ylin) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes available (with FFT for automatical matching) Dec 11 2007 09:01AM (ylin) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes normally in [0,pi,pi,0] phase for heating. current drive phase available if requested. Dec 11 2007 09:03AM (ylin) Steve Wukitch J-port antenna wukitch,ylin
Lower Hybrid yes Body I Fault Circuits Repaired and tested. High power tests completed Dec 05 2007 06:40PM (dterry) Ron Parker Lower Hybrid dterry,parker
LPI yes 1/9/08 Jan 09 2008 03:23PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha yes Midplane working fine, emissivity profiles being stored in tree, but still need to apply in-vessel calibrations to data. WB1-LY being digitized, but not processed in tree. Dec 09 2007 06:53PM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke
McPherson no Problems with detector. No quantitative line brightnesses possible. Qualitative tasks like impurity identification possible. Feb 15 2008 02:07PM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Operational Apr 29 2008 02:30PM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes E-Top, E-Bottom, F-top (cryo), G-side, and B-bottom are operational. F-top gauge has a 'sniffer tube' to measure pressures in cryopump gas box. Mar 20 2007 06:42PM (g) Brian LaBombard Baratron pressure gauges labombard
MLP no Initial tests on the A-port scanning probe went well. We need to take care of some control glitches that caused some component failures. May 30 2007 08:01PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard
MSE no We are basically awaiting the DNB & its new aperture. MSE itself is OK. Feb 21 2008 08:51AM (jinseok) Steve Scott Motional Stark Effect jinseok,sscott
Neutrons yes Voltage is on for the He3 bank. Voltage will be turned on for the global system at the first plasma attempts. Nov 26 2007 08:31AM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes calibration unchanged from 2007 campaign Dec 04 2007 08:56PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby
NINJA yes All capillaries displayed by the NINJA_CONTROL GUI have been tested. Nov 26 2007 04:26PM (terry) Brian LaBombard NINJA gas puff labombard,terry
PCI yes working Feb 29 2008 07:00PM (lianglin) Miklos Porkolab Phase Contrast Imaging edlund,lianglin,ntsujii,porkolab
Penning Gauges yes All gauges except B_DivL are operating Nov 27 2007 01:31PM (labombard) Brian LaBombard Penning Ionization Gauges labombard
Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Nov 26 2007 04:27PM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe
Polarimeter no Safe for Machine Entry Sep 14 2007 12:17PM (irby) Jim Irby C-Mod Polarimeter irby
Probe Array - ISD yes Operational Nov 27 2007 01:40PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH yes Operational Nov 27 2007 01:40PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes Operational Nov 27 2007 01:41PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard
Probe Array - UDIV yes Operational Nov 27 2007 01:41PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes System is fully connected except for the 75GHz channel. System was connected on 1080422. Apr 22 2008 08:26AM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Operational, but needs to be checked with plasma. Nov 27 2007 01:45PM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes FSP is operational Dec 11 2007 10:13AM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP yes A- and K-port WASP electrodes have been replaced/tested. Nov 27 2007 01:44PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
TCI yes Operational Apr 29 2008 03:33PM (irby) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes One laser operational, 12 spatial channels Apr 11 2008 10:36AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma
TS - Edge yes System is working with 3 out of 4 spectral channels and should be believable for Te>50eV, ne>3e19. Density is calibrated from both Raman scattering in D2 (3/2/08) and from edge ECE cutoffs in high-density H-modes (1080228014). Apr 11 2008 10:36AM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma
Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf
XTOMO yes system operational, but channels have been dying...stay tuned. Mar 14 2008 11:10AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke

Session Leader Comments
May 14 2008 09:16:29:433AM	1080514001	Catherine Fiore	No gas, no plasma.
May 14 2008 03:16:06:613PM	1080514001	Catherine Fiore	No gas, no plasma.
May 14 2008 09:27:16:283AM	1080514002	Catherine Fiore	Nice target plasma, but no rf to speak of.
May 14 2008 09:42:22:123AM	1080514003	Catherine Fiore	Nice target plasma, but no rf to speak of.
May 14 2008 09:51:24:910AM	1080514004	Catherine Fiore	Nice target plasma, but no rf to speak of.
May 14 2008 10:07:03:907AM	1080514005	Catherine Fiore	Nice target plasma, but no rf to speak of.
May 14 2008 10:38:23:840AM	1080514006	Catherine Fiore	Nice target plasma, but no rf to speak of. We are going to try operation at 4.5 T with 80 Mhz off axis on the LFS to develop a target ITB. We'll continue to try and bring up J-port at the same time.
May 14 2008 10:54:05:350AM	1080514007	Catherine Fiore	Nice target plasma, 4.5 T, 0.8 MA, but no rf to speak of. No gate on E, no match on D.
May 14 2008 11:13:46:240AM	1080514008	Catherine Fiore	Nice target plasma, 4.5 T, 0.8 MA, but no rf to speak of. E has a fault that won't clear. ICRF group is going in the cell.
May 14 2008 12:07:33:687PM	1080514009	Catherine Fiore	Nice target plasma, 4.5 T, 0.8 MA. RF group fixed the problem with E, but it faulted. 1 MW out of D. We expect both to be operational next shot.
May 14 2008 12:17:13:523PM	1080514010	Catherine Fiore	Nice target plasma, 4.5 T, 0.8 MA. 2 MW RF. We'll lower the target density slightly. It appears to be too high for J- antenna
May 14 2008 12:34:35:130PM	1080514011	Catherine Fiore	ITB at 1.2 s, despite having only 1 MW RF and an earlier back transition.
May 14 2008 12:52:11:817PM	1080514012	Catherine Fiore	Nice ITB 1-1.36 s. J port is coming up slowly.
May 14 2008 01:06:50:360PM	1080514013	Catherine Fiore	Nice ITB 1-1.36 s.
May 14 2008 03:12:37:423PM	1080514014	Catherine Fiore	ITB 1.to 1.33 s. From this point we will try to get J-port power to stabilize the ITB
May 14 2008 03:10:20:173PM	1080514015	Catherine Fiore	Nice ITB 1-1.36 s.
May 14 2008 03:11:57:283PM	1080514015	Catherine Fiore	ITB 1.1 to 1.4s
May 14 2008 03:10:54:000PM	1080514016	Catherine Fiore	Disruption, injection?
May 14 2008 03:13:07:470PM	1080514017	Catherine Fiore	ITB despite multiple back transitions. The target density may be a little low.
May 14 2008 03:13:45:317PM	1080514019	Catherine Fiore	ITB despite multiple back transitions.
May 14 2008 03:14:10:723PM	1080514020	Catherine Fiore	ITB despite multiple back transitions.
May 14 2008 03:04:52:357PM	1080514021	Catherine Fiore	ITB ends in big back transition because of a D-port fault at 1.25 s
May 14 2008 03:14:55:113PM	1080514021	Catherine Fiore	ITB ends in big back transition because of a D-port fault at 1.25 s
May 14 2008 03:27:34:483PM	1080514022	Catherine Fiore	ITB ends in big back transition because of a D-port fault at 1.18s. Looks like radiation is becoming an issue
May 14 2008 03:42:29:960PM	1080514023	Catherine Fiore	ITB, ends in back transition at 1.3 s. J-port 0.4 MW per request. Request 0.6 MW on the next shot.
May 14 2008 03:48:25:623PM	1080514024	Catherine Fiore	ITB, ends in back transition at 1.18 s. J-port 0.6 MW. Repeat with J-port at 1.1 s on the next shot.
May 14 2008 04:05:09:823PM	1080514025	Catherine Fiore	Really nice ITB, brief arrest with J-port onset, but ends in back transition at 1.3 s. J-port 0.6 MW. Repeat with J-port at 1 MW on the next shot.
May 14 2008 04:29:05:623PM	1080514027	Catherine Fiore	Really nice ITB but J-port at 1 MW fails to arrest the density rise. It ends in back transition at 1.2 s. Repeat.
May 14 2008 04:41:06:070PM	1080514028	Catherine Fiore	Really nice ITB but J-port at 1 MW arrests the density rise briefly, and then it rises again before ending in a back transition at 1.23 s. Lower J-port power to 0.8 MW.
May 14 2008 04:53:21:720PM	1080514029	Catherine Fiore	Really nice ITB but J-port at 0.8 MW arrests the density rise briefly, and then it rises again before ending in a back transition at 1.32 s. Increase J-port power to 1.4 MW.
May 14 2008 05:16:15:720PM	1080514031	Catherine Fiore	The plasma was just starting to think about forming an ITB when we whacked it with 1.4 MW from J-port and killed the rise. Oh well.

Physics Operator Comments
May 13 2008 10:55:27:097PM		Robert Granetz	Loaded DPCS from 1080513023 (2nd-to-last shot from Tuesday, with good, non-cryopump startup. Loaded seg 2 from 1040309023 seg 2; 'Call'ed all magnetics-dependent estimators (which automatically zeroed the old offsets in CLEARIN and Ip); Checked that the non-magnetics-dependent predictors looked reasonable; Programmed Ip to 0.9 MA; Programmed Bt to 5.4 T; Confirmed the nl_04 was already programmed to 1.0e20 m-2. Note: this old shot doesn't feedback control the error fields Saved DPCS setup in /home/granetz/pcs_scratch as shot 1080514000
May 14 2008 09:14:44:490AM	1080514001	Robert Granetz	Shot 01 -- Dud. No gas. Valves and plena were setup and enabled properly. The 100 volts didn't turn on. The EIC (Bill Parkin) reports that this glitch has been seen before. Next shot: try again for plasma; if the valve voltage still doesn't come on, then we'll have to stop and debug the problem
May 14 2008 09:31:18:880AM	1080514002	Robert Granetz	Shot 02 -- Plasma. Good shot. 5.4 T, 0.9 MA, 1.0e20 m-2, lower single null...just want we want. No ICRF. Yijun says it will take a couple of shots to get the ICRF going. Next shot: repeat, with RF
May 14 2008 10:02:46:060AM	1080514003	Robert Granetz	Shot 03 -- Plasma. Good shot. Still no RF. Next shot: repeat w/RF
May 14 2008 10:03:25:407AM	1080514004	Robert Granetz	Shot 04 -- Plasma. Good shot. J-port is starting to show signs of life (70 MHz). Next shot: continue getting J-port going.
May 14 2008 10:08:43:207AM	1080514005	Robert Granetz	Shot 05 -- Plasma. Good shot. J-port still only spitting. Next shot: Whereforth are thou, J-port?
May 14 2008 10:45:21:110AM	1080514006	Robert Granetz	Shot 06 -- Plasma. Good shot. J-port still not working. Short cell access after the shot to turn off LHe DNB fill. Next shot: lower Bt to 4.5 T (124 kA) and Ip to 0.8 MA; turn on D & E (80 MHz) in addition to J (at 70 MHz); try for ITB with high-field side RF; increase argon pulse to 60 ms (from 40 ms)
May 14 2008 10:53:00:600AM	1080514007	Robert Granetz	Shot 07 -- Plasma. Good shot. 4.5 T, 0.8 MA, 1.0e20 m-2, lower single null. D and J were on, but negligible power. Next shot: repeat w/ICRF
May 14 2008 11:13:19:570AM	1080514008	Robert Granetz	Shot 08 -- Plasma. Good shot. Still no RF. Cell and power room access after the shot for RF. Next shot: repeat w/RF
May 14 2008 12:08:40:313PM	1080514009	Robert Granetz	Shot 09 -- Plasma. Good shot. Got 0.9 MW from D. E is spitting. No J. No H-mode. Next shot: repeat w/RF
May 14 2008 12:21:11:323PM	1080514010	Robert Granetz	Shot 10 -- Plasma. Good shot. Prf=2.0 MW (1.0 from D and 1.0 from E). Nothing from J. No H-mode, since Bt is 4.5 T and the 80 MHz is off-axis. Next shot: decrease nl_04 to 0.8e20 m-2 (from 1.0e20 m-2)
May 14 2008 12:40:09:480PM	1080514011	Robert Granetz	Shot 11 -- Plasma. Good shot. H-modes!! Prf=1 MW (from E only). Next shot: repeat
May 14 2008 12:49:22:890PM	1080514012	Robert Granetz	Shot 12 -- Plasma. Good shot. H-modes. 2 MW at 80 MHz, 0.4 MW at 70 MHz. Catherine says, there's an ITB. Next shot: repeat, continue bringing up J-port; add 2 ms to pre-fill
May 14 2008 01:07:08:140PM	1080514013	Robert Granetz	Shot 13 -- Plasma. Good shot. Long steady H-mode. Good ITB. Prf=2 MW of 80 MHz and 1.8 MW of 70 MHz w/faulting. Next shot: add another 2 ms to pre-fill; fire DNB into plasma on next shot
May 14 2008 01:14:04:693PM	1080514014	Robert Granetz	Shot 14 -- Plasma. Disrupted at t=1.4 s; might be due to the ITB impurity buildup, since the on-axis heating (J-port at 70 MHz) didn't go. DNB fired at 50 kV and 6 A. Next shot: increase pre-fill by another 2 ms
May 14 2008 01:28:06:563PM	1080514015	Robert Granetz	Shot 15 -- Plasma. Disrupted at 1.45 when the ITB collapses. We need J-port on-axis heating (at 70 MHz) to prevent the buildup and collapse. DNB at 50 kV and 6-6.5 A w/faults. Next shot: add 1 ms to pre-fill; add 20 ms to argon (to 80 ms)
May 14 2008 01:40:11:243PM	1080514016	Robert Granetz	Shot 16 -- Plasma. Disrupted very early. Looks like an injection. Lousy startup. Next shot: increase RCUR offset in seg 1 to 1500 (from 1000)
May 14 2008 01:57:03:007PM	1080514017	Robert Granetz	Shot 17 -- Plasma. Disrupted at t=1.4 s when ITB collapses. Prf=2 MW of 80 MHz, but nothing from J-port at 70 MHz. Startup is much improved. Next shot: raise nl_04 to 0.9e20 m-2 (from 0.8e20 m-2)
May 14 2008 02:03:46:230PM	1080514018	Robert Granetz	Shot 18 -- Fizzle. All power supplies worked. Next shot: reduce pre-fill by 3 ms
May 14 2008 02:18:13:600PM	1080514019	Robert Granetz	Shot 19 -- Plasma. Good shot. Disrupted during rampdown. Lots of short H-modes. Core continues to peak, even though the H-modes are transient. J-port is still having problems. Next shot: no DPCS changes
May 14 2008 03:05:29:967PM	1080514020	Robert Granetz	Shot 20 -- Plasma. Disrupts at 1.43 s when the ITB collapses. Prf=2 MW of 80 MHz, and a short pulse of 1 MW of 70 MHz. Cell access after this shot for PCI. Next shot: no DPCS changes
May 14 2008 03:02:47:540PM	1080514021	Robert Granetz	Shot 21 -- Plasma. Good full-length shot. J-port gives a short pulse of 2 MW of 70 MHz. DNB fired into plasma this time. Next shot: no DPCS changes
May 14 2008 03:22:45:027PM	1080514022	Robert Granetz	Shot 22 -- Plasma. Good shot. J faulted badly. Next shot: reduce argon puff to 60 ms (from 80 ms)
May 14 2008 03:36:40:753PM	1080514023	Robert Granetz	Shot 23 -- Plasma. Good shot. Short pulses of 2 MW from J-port. Next shot: no DPCS changes
May 14 2008 03:57:06:583PM	1080514024	Robert Granetz	Shot 24 -- Plasma. Good shot. Got 1 MA at 70 MHz from J-port for about 0.25 s. DNB is firing into plasma again...good shot. Next shot: no DPCS changes
May 14 2008 04:06:41:450PM	1080514025	Robert Granetz	Shot 25 -- Plasma. Disrupts at t=1.36 s when the ITB collapses. Good RF from both the 80 MHz and the 70 MHz transmitters. Next shot: no DPCS changes; increase J-port power to 1 MW
May 14 2008 04:15:06:690PM	1080514026	Robert Granetz	Shot 26 -- Fizzle. Inexplicable. Everything looks fine. Next shot: try again, no changes
May 14 2008 04:30:59:610PM	1080514027	Robert Granetz	Shot 27 -- Plasma. Good shot. 1 MW of 70 MHz (J), 2 MW of 80 MHz (D+E). Good DNB too. Next shot: no DPCS changes
May 14 2008 04:45:54:183PM	1080514028	Robert Granetz	Shot 28 -- Plasma. Goood shot. 1 MW of 70 MHz from J; 2 MW of 80 MHz from D+E. Next shot: no DPCS changes; lithium pellet will be fired during the current rampdown
May 14 2008 04:53:25:237PM	1080514029	Robert Granetz	Shot 29 -- Plasma. Disrupted at t=1.43 s after the ITB collapses. 2 MW of 80 MHz; 0.9 MW of 70 MHz. Good DNB. Next shot: increase argon puff back to 80 ms
May 14 2008 05:05:32:573PM	1080514030	Robert Granetz	Shot 30 -- No-power shot because of a critical power failure during INIT of the RF. Next shot: try again for the last shot
May 14 2008 05:18:10:693PM	1080514031	Robert Granetz	Shot 31 -- Plasma. Disrupted at t=1.66 s during rampdown. Li pellet fired at 1.61 s. 2 MW of 80 MHz; 1.5 MW of 70 MHz. Good DNB. End of run

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:08:19:863AM	Plasma	Bad	NO HV enable for gas
2	09:20:42:230AM	Plasma	Ok
3	09:35:08:523AM	Plasma	Ok
4	09:47:41:097AM	Plasma	Ok
5	10:03:25:610AM	Plasma	Ok
6	10:19:16:823AM	Plasma	Ok
7	10:48:19:017AM	Plasma	Ok
8	11:02:15:437AM	Plasma	Ok
9	11:57:03:913AM	Plasma	Ok
10	12:09:54:143PM	Plasma	Ok
11	12:26:36:843PM	Plasma	Ok
12	12:39:03:807PM	Plasma	Ok
13	12:54:18:617PM	Plasma	Ok
14	01:06:55:250PM	Plasma	Ok
15	01:19:53:133PM	Plasma	Ok
16	01:35:47:007PM	Plasma	Ok
17	01:48:17:860PM	Plasma	Ok
18	02:00:45:167PM	Plasma	Ok
19	02:13:24:427PM	Plasma	Ok
20	02:26:06:780PM	Plasma	Ok
21	02:55:46:253PM	Plasma	Ok
22	03:14:57:987PM	Plasma	Ok
23	03:30:20:360PM	Plasma	Ok
24	03:43:33:917PM	Plasma	Ok
25	03:56:28:113PM	Plasma	Ok
26	04:09:05:827PM	Plasma	Ok
27	04:21:40:477PM	Plasma	Ok
28	04:34:13:393PM	Plasma	Ok
29	04:46:40:107PM	Plasma	Ok
30	04:59:07:303PM	Plasma	Bad	Critical Power Failure RF
31	05:11:25:220PM	Plasma	Ok