Miniproposals

Miniproposal: 355c Date Filed: 9/2/2011 Title: ICRF Testing and Conditioning, with detection of mode-conversion location First Author: Steve Wukitch Session Leader: Steve Wukitch (shots 1-36)

Engineering Operator Run Comment

MP355C ICRF Testing and Conditioning

Session Leader Plans

Entered: Jan 3 2012 01:48:58:647PM

Author: Steve Scott

'Auxiliary' Session Leader Plan for DNB-deuterium operation Note: There must be no cell access when DNB is actually firing deuterium into the calorimeter. This will be enforced administratively by the Physics Operator. All shots will be: 60-ms beam on, 40-ms beam off. Part 1: DNB into calorimeter. These shots will be taken between actual C-Mod shots. We will only take DNB shots up to 8 minutes past the previous C-Mod plasma shot, so as not to interfere with the C-Mod data acquisition cycle. Part 1a: Perveance scan at 50 kV, with bending magnet OFF. 8-10 pulses per shot, varying the beam current from about 4.5 to about 7.0 amps. Part 1b: At the optimum perveance identified in step 1a, with bending magnet OFF, take 2 shots each at 2, 4, 6, 8, and 10 pulses per shot. Part 1c: with bending magnet ON, take 3 shots at 10 pulses per shot at optimum perveance. Part 2: DNB into plasma. 5-10 shots at 8-10 DNB pulses per shot. We will accept whatever plasma conditions are available at the time. Purpose is to compare measured versus expected neutron emission. Part 2a: between C-Mod plasma shots in Part 2, take a single DNB-into-empty-torus shot. To avoid overheating the inner limiter, restrict the beam to 4 pulses per shot.

Entered: Jan 4 2012 03:22:48:230PM

Author: Steve Wukitch

Use vanilla 5.4 T, 0.8 MA discharges (start with 1111216003) to condition D/E and J antennas. Since this is the first plasma operation post up to helium for a boroscope inspection of the FA-J antenna, we will use vanilla plasmas to investigate the machine condition. If the H/H+D is high as expected, we will continue to condition the antennas and the machine. Depending on conditions, we may switch to upper single null discharges as on 1111209 (006-010). In piggy back, we will condition J-antenna in its 2-strap configuration to max power in L-mode, and examine its power handling, voltage limit. We will compare J/D/E antennas in terms of heating effectiveness, impurity production and neutral pressure limit if time permits.

Entered: Jan 4 2012 05:06:53:930PM

Author: Steve Wukitch

Use vanilla 5.4 T, 0.8 MA discharges (start with 1120104034) to condition D/E and J antennas. To increase number of Joules, we will overlap the antennas and bring up the power shot to shot. Depending on conditions, we will switch to upper single null discharges as on 1120104032.

Physics Operators Plans

Entered: Jan 4 2012 08:26:12:307AM

Author: Greg Wallace

Set Up for 04 Jan 2012 MP355C ICRF Testing and Conditioning SL: Y. Lin/S. Wukitch PO: G. Wallace ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1111216003 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) Leave H-bot as is D2 Hybrid DISABLED (PG5) DO NOT fill B-div, Hybrid DISABLED (PG6) DO NOT fill H-div, Hybrid DISABLED (PG7) Leave NINJA as is, DISABLED Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus + LoWEUS Z-bolo shutter should be closed unless requested by physop Check with the physop before opening other diagnostic gate-valves or shutters. Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): YES ICRF(yes/no): yes -- all transmitters LH(yes/no): no power requested, but LH-SOL reflectometer will be used. Cryopump (yes/no): no DNB (yes/no): will be firing between shots with Deuterium beam Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s ================================== Tentative plan: Will load seg 1 from 1111216034 and seg 2 from 1111216003 Then proceed with Session Leader plan to exercise J-port as a 2-strap, etc.

Session Leader Summaries

Entered: Jan 4 2012 05:01:34:557PM

Author: Steve Wukitch

Machine and antenna conditioning were not significantly setback as a result of the up to helium. After some initial issues with USN, we managed to get fairly repeatable USN and were able to switch back to LSN. The H/H+D started <10% but by the end of the day was approaching 15-18%.

Physics Operator Summaries

Entered: Jan 4 2012 05:17:25:813PM

Author: Greg Wallace

The run started slowly this morning due to the PG3 gas valve sticking. The PG3 valve started working again after increasing the initial puff to 50ms at 100V on shot 4. Shot 5 was the first plasma of 2012. The lower nulls were based on seg 2 from shot 1111216003 with initial seg 1 from 1111216034. The LSN plasmas ran well with plasmas typically running all the way through rampdown to 0 kA. A few early disruptions were attributed to loss of density feedback---the PG3 valve would open full bore when TCI was lost. We switched to USN plasmas starting with shot 15 (loaded seg 2 of 1111209012 into seg 3). These plasmas were vertically unstable with many disruptions at about 0.2s. Steve Wolfe discovered that the RCUR through ZXU predictors had not been recalculated since the coil changes during the last manned access. Performance improved after fixing this, but we still had many fizzles and early disruptions. The CLEARIN ramp was slowed down to keep the plasmas from diverting so quickly. Additional fiddling with the PG3 and PG4 gas programming in seg 1 helped with both the fizzles and early disruptions. By shots 31-32 we had stable USN plasmas. Shots 33-36 went back to LSN. Additional minor fiddling with the PG4 prepuff fixed the fizzle on shot 35.

Session Leader Comments
Jan 4 2012 09:17:28:577AM	1120104001	Steve Wukitch	gas test
Jan 4 2012 09:17:22:053AM	1120104002	Steve Wukitch	gas test
Jan 4 2012 09:33:54:430AM	1120104003	Steve Wukitch	gas test
Jan 4 2012 09:34:15:140AM	1120104004	Steve Wukitch	gas test
Jan 4 2012 09:53:15:333AM	1120104005	Steve Wukitch	005 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.25, 1.60] sec, 0.50 to 0.75 MW, 80.5 MHz E : t = [0.90, 1.25] sec, 0.20 to 0.75 MW, 80.0 MHz J4: t = [0.50, 0.90] sec, 0.25 to 0.75 MW, 78.0 MHz result: plasma into rampdown heating with RF -H/H+D starts low but climbs quickly to 10% significant density evolution with antennas next: repeat - staircase RF power
Jan 4 2012 09:59:45:970AM	1120104006	Steve Wukitch	006 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.25, 1.60] sec, 0.50 to 0.75 MW, 80.5 MHz E : t = [0.90, 1.25] sec, 0.20 to 0.75 MW, 80.0 MHz J4: t = [0.50, 0.90] sec, 0.25 to 0.75 MW, 78.0 MHz result: plasma into rampdown heating with all antennas significant density evolution with antennas next: repeat - staircase RF power
Jan 4 2012 10:24:23:933AM	1120104007	Steve Wukitch	007 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.30, 1.60] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [0.95, 1.23] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [0.60, 0.88] sec, 0.30 to 1.20 MW, 78.0 MHz result: plasma into rampdown some sparkles from FA-Jant during E pulse next: repeat
Jan 4 2012 10:36:01:763AM	1120104008	Steve Wukitch	008 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.30, 1.60] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [0.95, 1.23] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [0.60, 0.88] sec, 0.30 to 1.20 MW, 78.0 MHz result: plasma into rampdown good comparison next: new order E-J-D
Jan 4 2012 10:39:55:640AM	1120104009	Steve Wukitch	disruption ~ 0.43 s but discharge was ill much earlier
Jan 4 2012 11:11:37:167AM	1120104011	Steve Wukitch	early disruption ~0.43 s
Jan 4 2012 11:36:50:663AM	1120104012	Steve Wukitch	012 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [1.30, 1.60] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [0.60, 0.88] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [0.95, 1.23] sec, 0.30 to 1.30 MW, 78.0 MHz result: plasma into rampdown little H-mode during first pulse next: switch order to D-J-E
Jan 4 2012 11:52:13:843AM	1120104013	Steve Wukitch	013 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [0.60, 0.88] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [1.30, 1.60] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [0.95, 1.23] sec, 0.30 to 1.30 MW, 78.0 MHz result: plasma into rampdown next: repeat
Jan 4 2012 11:56:23:333AM	1120104014	Steve Wukitch	014 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [0.60, 0.88] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [1.30, 1.60] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [0.95, 1.23] sec, 0.30 to 1.30 MW, 78.0 MHz result: plasma into rampdown next: USN - recall from 1111216012
Jan 4 2012 01:58:22:947PM	1120104015	Steve Wukitch	015 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN result: early disruption next: repeat
Jan 4 2012 01:58:58:470PM	1120104016	Steve Wukitch	016 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN result: early disruption next: repeat
Jan 4 2012 01:59:39:473PM	1120104017	Steve Wukitch	017 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN result: early disruption next: repeat
Jan 4 2012 01:59:50:213PM	1120104018	Steve Wukitch	018 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN D : t = [0.60, 0.88] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [1.30, 1.60] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [0.95, 1.23] sec, 0.30 to 1.30 MW, 78.0 MHz result: plasma next: repeat with new RF order J-D-E
Jan 4 2012 02:00:01:467PM	1120104019	Steve Wukitch	019 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN D : t = [0.95, 1.23] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [1.30, 1.60] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [0.60, 0.88] sec, 0.30 to 1.30 MW, 78.0 MHz result: plasma
Jan 4 2012 02:00:10:987PM	1120104020	Steve Wukitch	020 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN result: early disruption next: repeat
Jan 4 2012 02:00:20:583PM	1120104021	Steve Wukitch	021 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN result: early disruption next: repeat
Jan 4 2012 02:00:31:563PM	1120104022	Steve Wukitch	022 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN result: early disruption next: repeat
Jan 4 2012 02:00:39:577PM	1120104023	Steve Wukitch	023 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN result: early disruption next: repeat
Jan 4 2012 02:38:38:270PM	1120104024	Steve Wukitch	024 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN D : t = [0.95, 1.23] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [0.60, 0.88] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [1.30, 1.60] sec, 0.30 to 1.30 MW, 78.0 MHz result: plasma next: repeat with D-E-J order
Jan 4 2012 02:38:46:387PM	1120104025	Steve Wukitch	025 early disruption
Jan 4 2012 03:06:10:707PM	1120104026	Steve Wukitch	no power
Jan 4 2012 03:20:28:810PM	1120104028	Steve Wukitch	028 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN D : t = [0.95, 1.23] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [1.30, 1.60] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [0.60, 0.88] sec, 0.30 to 1.30 MW, 78.0 MHz result: plasma next: repeat with J-E-D order
Jan 4 2012 03:39:29:857PM	1120104029	Steve Wukitch	029 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN D : t = [1.30, 1.60] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [0.95, 1.23] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [0.60, 0.88] sec, 0.30 to 1.30 MW, 78.0 MHz result: plasma next: repeat with E-J-D order
Jan 4 2012 03:43:09:263PM	1120104030	Steve Wukitch	030 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN result: early disruption
Jan 4 2012 04:00:22:263PM	1120104031	Steve Wukitch	031 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN D : t = [1.30, 1.60] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [0.60, 0.88] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [0.95, 1.23] sec, 0.30 to 1.30 MW, 78.0 MHz result: plasma next: repeat with E-D-J
Jan 4 2012 04:20:16:650PM	1120104032	Steve Wukitch	032 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, USN D : t = [0.95, 1.23] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [0.60, 0.88] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [1.30, 1.60] sec, 0.30 to 1.30 MW, 78.0 MHz result: plasma next: LSN D E J
Jan 4 2012 04:39:44:120PM	1120104034	Steve Wukitch	034 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN D : t = [0.60, 0.88] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [0.95, 1.23] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [1.30, 1.60] sec, 0.30 to 1.30 MW, 78.0 MHz result: plasma next: J-D-E
Jan 4 2012 04:47:40:107PM	1120104035	Steve Wukitch	035 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN fizzle
Jan 4 2012 05:02:05:773PM	1120104036	Steve Wukitch	035 request: Bt=5.4 T, Ip=0.8 MA, nl04=0.6, LSN fizzle 036 request: BT=5.4 T, Ip=0.8, nl04=0.6, LSN D : t = [0.95, 1.23] sec, 0.30 to 1.10 MW, 80.5 MHz E : t = [1.30, 1.60] sec, 0.30 to 1.10 MW, 80.0 MHz J4: t = [0.60, 0.88] sec, 0.30 to 1.30 MW, 78.0 MHz result: plasma - EoR

Physics Operator Comments
Jan 4 2012 09:10:52:510AM	1120104001	Greg Wallace	Result: Gas puff test. No gas. Next shot: Will try again.
Jan 4 2012 09:21:33:287AM	1120104002	Greg Wallace	Changes: Try gas puff test again. Result: PG4 worked but no PG3. Next shot: Try again with bigger PG3 puff.
Jan 4 2012 09:28:42:750AM	1120104003	Greg Wallace	Changes: Try again with bigger PG3 puff. 20ms at 100V. Result: Still no PG3. Next shot: Increase PG3 puff to 50ms at 100V and try for another gas puff.
Jan 4 2012 09:34:03:733AM	1120104004	Greg Wallace	Changes: Increase PG3 puff to 50ms at 100V and try for another gas puff. Result: Gas puff test successful. Next shot: Return to original 20ms PG3 puff from seg 1 of 1111216034.
Jan 4 2012 09:52:09:530AM	1120104005	Greg Wallace	Changes: Return to original 20ms PG3 puff from seg 1 of 1111216034. Try for plasma. Result: Plasma! First shot of the new year! Went all the way to the end of rampdown. A few hards at 40ms. Will monitor it but no changes to seg 1 for now. Next shot: Repeat. Enable 50ms Ar puff.
Jan 4 2012 10:05:48:520AM	1120104006	Greg Wallace	Changes: Repeat. Enable 50ms Ar puff. Result: Plasma through rampdown again. Early hards went down. No RF faults. Next shot: Repeat. Increase Ar puff from 50ms to 75ms.
Jan 4 2012 10:18:31:363AM	1120104007	Greg Wallace	Changes: Repeat. Increase Ar puff from 50ms to 75ms. Result: Plasma through rampdown. Next shot: Repeat.
Jan 4 2012 10:33:08:240AM	1120104008	Greg Wallace	Changes: Repeat. Result: Plasma through rampdown again. Next shot: Repeat shot 8.
Jan 4 2012 10:47:44:257AM	1120104009	Greg Wallace	Changes: Repeat shot 8. Result: Disruption at 0.43s. Lots of stuff flying around. Things started to go south about 0.15s. TCI was lost which caused gas puff feedback to go full on after 0.15s. Next shot: Try again with same programming.
Jan 4 2012 10:53:32:813AM	1120104010	Greg Wallace	Changes: Try again with same programming. Result: Plasma through rampdown. Looks good after disruption on shot 9. Next shot: Repeat. Try for better E and J performance.
Jan 4 2012 11:11:03:390AM	1120104011	Greg Wallace	Changes: Repeat. Try for better E and J performance. Result: Disruption at 0.43s. Looks like we lost gas feedback control again due to TCI error. Next shot: Will try to fix TCI. Otherwise repeat same shot.
Jan 4 2012 11:40:41:960AM	1120104012	Greg Wallace	Changes: Will try to fix TCI. Otherwise repeat same shot. Result: Plasma through rampdown. H/H+D is under 15%. Next shot: Repeat.
Jan 4 2012 11:51:09:837AM	1120104013	Greg Wallace	Changes: Repeat. Result: Plasma through rampdown. Next shot: Repeat.
Jan 4 2012 12:01:19:397PM	1120104014	Greg Wallace	Changes: Repeat. Result: Plasma through rampdown. Next shot: Change to upper null. Load seg 2 from 1111209012 into seg 3 and turn off seg 2.
Jan 4 2012 12:20:27:380PM	1120104015	Greg Wallace	Changes: Change to upper null. Load seg 2 from 1111209012 into seg 3 and turn off seg 2. Result: Disruption at 0.23s. Vertically unstable before plasma is diverted. Wolfe discovered that RCUR through ZXU are using old predictors and need to be re-called. Next shot: Segment 3 control wires re-called. Try again for USN.
Jan 4 2012 12:27:13:763PM	1120104016	Greg Wallace	Changes: Segment 3 control wires re-called. Try again for USN. Result: Dud. Neither PG3 nor PG4 gas puffs went through. Demand for both valves was correct, so looks like a PLC error? Next shot: Try again and hope that gas valves work this time.
Jan 4 2012 12:42:03:927PM	1120104017	Greg Wallace	Changes: Try again and hope that gas valves work this time. Result: Startup OK this time but still disrupted at 0.22s. CLEARIN is ramping up too fast during change from limited to diverted. Next shot: Decrease flattop CLEARIN to 0 (nominally 1cm inner gap). Decrease CLEARIN point at 0.25s to -0.01 (nominally 0 inner gap).
Jan 4 2012 12:52:40:100PM	1120104018	Greg Wallace	Changes: Decrease flattop CLEARIN to 0 (nominally 1cm inner gap). Decrease CLEARIN point at 0.25s to -0.01 (nominally 0 inner gap). Result: Plasma through rampdown with USN. D and J had no faults, E had faults at higher power. Next shot: Repeat.
Jan 4 2012 01:12:01:890PM	1120104019	Greg Wallace	Changes: Repeat. Result: Plasma through rampdown. Next shot: Repeat.
Jan 4 2012 01:24:46:657PM	1120104020	Greg Wallace	Changes: Repeat. Result: Fizzle. Everything is same as shot 19 until about 12ms, then current rise stops. Bz0 looks ok, so does pressure. R0 and z0 deviate from shot 19 at about 12ms. Next shot: Try again before making changes. Might just be junk stirred up by previous shot.
Jan 4 2012 01:34:54:857PM	1120104021	Greg Wallace	Changes: Try again before making changes. Might just be junk stirred up by previous shot. Result: Hards starting at about 70ms. Disruption at 0.23s. Vertically unstable. Next shot: Move CLEARIN=-0.01 point from 0.25s to 0.3s to slow down change from limited to diverted configuration.
Jan 4 2012 01:51:02:020PM	1120104022	Greg Wallace	Changes: Move CLEARIN=-0.01 point from 0.25s to 0.3s to slow down change from limited to diverted configuration. Result: Disruption at 0.2s. Some early runaways, hards really start rising around 60ms. Next shot: Add PG3 control point at t=-0.15, v=100 to increase early PG3 to help control runaways.
Jan 4 2012 02:20:31:970PM	1120104023	Greg Wallace	Changes: Add PG3 control point at t=-0.15, v=100 to increase early PG3 to help control runaways. Result: Early hards (t<0.05s) went away but still have runaways after about 0.06s. Plasma disrupts at 0.19s. Vertically unstable. Next shot: Extend PG3 back porch out to 100ms at v=30.
Jan 4 2012 02:30:11:000PM	1120104024	Greg Wallace	Changes: Extend PG3 back porch out to 100ms at v=30. Result: Plasma through rampdown, but lots of early runaways. Bounce at 14ms. Next shot: Move CLEARIN=-0.01 point from 300ms to 250ms. Extend early PG3 by 5ms and PG4 pre-puff by 2ms.
Jan 4 2012 02:45:49:660PM	1120104025	Greg Wallace	Changes: Move CLEARIN=-0.01 point from 300ms to 250ms. Extend early PG3 by 5ms and PG4 pre-puff by 2ms. Result: Disruption at 0.17s. Vertically unstable again. Bounces at 12ms and 30ms. Next shot: Shorten early PG3 flattop from 10ms back to 5ms in seg 1. Leave extended back porch in place and keep PG4 prepuff at 16ms.
Jan 4 2012 03:01:14:010PM	1120104026	Greg Wallace	Changes: Shorten early PG3 flattop from 10ms back to 5ms in seg 1. Leave extended back porch in place and keep PG4 prepuff at 16ms. Result: No power shot. Next shot: Repeat.
Jan 4 2012 03:09:50:203PM	1120104027	Greg Wallace	Changes: Shorten early PG3 flattop from 10ms back to 5ms in seg 1. Leave extended back porch in place and keep PG4 prepuff at 16ms. Result: Plasma through rampdown. Seg 1 looks good. Next shot: Repeat same shot.
Jan 4 2012 03:29:05:790PM	1120104028	Greg Wallace	Changes: Repeat same shot. Result: Plasma through rampdown. Next shot: Repeat.
Jan 4 2012 03:39:18:267PM	1120104029	Greg Wallace	Changes: Repeat. Result: Plasma through rampdown. Current rise is slightly slower, but not bad. Will keep an eye on it. Next shot: Repeat
Jan 4 2012 03:53:43:840PM	1120104030	Greg Wallace	Changes: Repeat. Result: Bounce in startup at about 12ms. Next shot: Increase early PG4 from 17 to 18 ms.
Jan 4 2012 04:05:29:600PM	1120104031	Greg Wallace	Changes: Increase early PG4 from 17 to 18 ms. Result: Plasma through rampdown. Still have some early hards. Next shot: Increase PG4 prepuff from 18 to 19 ms to help control early runaways.
Jan 4 2012 04:14:02:837PM	1120104032	Greg Wallace	Changes: Increase PG4 prepuff from 18 to 19 ms to help control early runaways. Result: Plasma through rampdown. Next shot: Go back to LSN. Turn off seg 3 and turn on seg 2.
Jan 4 2012 04:25:57:453PM	1120104033	Greg Wallace	Changes: Go back to LSN. Turn off seg 3 and turn on seg 2. Result: Plasma through rampdown. A little hesitation in the current ramp at 10ms. This shot had DNB firing Deuterium beam into plasma. Next shot: Repeat.
Jan 4 2012 04:37:04:780PM	1120104034	Greg Wallace	Changes: Repeat. Result: Plasma through rampdown. Next shot: Repeat with different RF antenna order.
Jan 4 2012 04:55:36:270PM	1120104035	Greg Wallace	Changes: Repeat with different RF antenna order. Result: Fizzle. Bounce at 15ms. Neutral pressure is slightly higher than previous shot??? Next shot: Reduce PG4 prepuff from 18ms to 17ms.
Jan 4 2012 05:18:23:647PM	1120104036	Greg Wallace	Changes: Reduce PG4 prepuff from 18ms to 17ms. Result: Plasma through rampdown. Last shot of the day.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:05:46:297AM	Test	Bad	Gas Test (fault not cleared)
2	09:15:13:803AM	Test	Bad	Gas Test (B-Main did not fire)
3	09:22:52:400AM	Test	Bad	Gas Test (B-Main did not fire)
4	09:29:34:963AM	Test	Ok	Gas Test (B-Main worked)
5	09:42:15:217AM	Plasma	Ok
6	09:55:32:520AM	Plasma	Ok
7	10:09:25:387AM	Plasma	Ok
8	10:22:03:623AM	Plasma	Ok
9	10:34:49:290AM	Plasma	Ok
10	10:47:58:563AM	Plasma	Ok
11	11:01:27:690AM	Plasma	Ok
12	11:28:25:937AM	Plasma	Ok
13	11:41:14:540AM	Plasma	Ok
14	11:54:11:983AM	Plasma	Ok
15	12:07:09:250PM	Plasma	Ok
16	12:20:47:090PM	Plasma	Ok
17	12:33:52:437PM	Plasma	Ok
18	12:46:44:890PM	Plasma	Ok
19	12:59:35:460PM	Plasma	Ok
20	01:12:30:280PM	Plasma	Ok
21	01:25:16:640PM	Plasma	Ok
22	01:38:03:170PM	Plasma	Ok
23	01:51:21:387PM	Plasma	Ok
24	02:21:13:413PM	Plasma	Ok
25	02:33:57:060PM	Plasma	Ok
26	02:46:42:780PM	Plasma	Bad	OH2 SCR Not Conducting before shot
27	03:01:52:957PM	Plasma	Ok
28	03:14:34:240PM	Plasma	Ok
29	03:27:23:030PM	Plasma	Ok
30	03:40:00:240PM	Plasma	Ok
31	03:54:16:410PM	Plasma	Ok
32	04:06:59:550PM	Plasma	Ok
33	04:19:41:153PM	Plasma	Ok
34	04:32:32:510PM	Plasma	Ok
35	04:45:17:160PM	Plasma	Ok
36	04:57:56:597PM	Plasma	Ok

System Availability

Jan 4 2012 09:05:17:903AM

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 golfit BES yes BES system is online Nov 22 2011 02:21PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes 2pi and midplane AXUV diodes awaiting first plasma. Divertor diodes installed, but amplifiers need to be installed. Core and divertor bolometry not yet hooked up Nov 17 2011 02:45PM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization no Bottle Removed. Magnetron Unplugged Apr 11 2011 09:51AM (dekow) Jim Irby Boronization dekow,irby CNPA yes Multiple channel CNPA available, no safety risk for in-vessel access Apr 14 2011 12:01PM (parker) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor no Shut down. Helium dewar removed. LN2 manual valve closed/ red-tagged and solenoid valves are closed Apr 15 2011 10:55AM (dekow) Brian LaBombard Upper Divertor Cryopump dekow,irby,labombard CXRS yes core-CXRS system is online Nov 22 2011 02:21PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan CXRS edge yes Michael CHurchill has primary responsibility at the moment Apr 19 2011 11:44AM (blip) Bruce Lipshultz Measurement of CXR light in the pedestal region at both the high- and low-field sides blip,rmchurch D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 01 2009 09:45AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe Dalsa no system is is installed and aligned, but not functional (appears to be a broken cable) Dec 05 2011 02:41PM (marmar) Earl Marmar Visible Bremsstrahlung Imaging marmar Disruption Mitigation no gas jet valve disabled on 2011/04/13 Apr 13 2011 02:04PM (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 DMBolo AXUV diodes no Diodes are taking data, but system is not fully operational yet. Post-acquisition data processing code is not yet functional. Dec 02 2011 03:27PM (golynyk) Geoff Olynyk Set of six AXUV diodes in a toroidal array of midplane wall boxes. golynyk,granetz,mlreinke,whyte DNB yes   Dec 01 2011 11:46AM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,mochung ECDC yes Operational as of 11/19/11 Nov 22 2011 03:01PM (irby) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE no Power off to RF and IF sections- Power on to DA Apr 11 2011 02:54PM (phillips) Perry Phillips Heterodyne ECE-32 channels bespam,liao,phillips,rowan,whitea G-Side Ratiomatic yes   Dec 02 2011 12:24PM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no Power supply unplugged and redtagged, HV cables removed Apr 14 2011 08:03AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby GPC yes Using new preamps. Nov 30 2011 07:51AM (hubbard) Amanda Hubbard ECE Polychromater hubbard GPC2 yes Dewar cold. Nov 21 2011 09:55AM (hubbard) Amanda Hubbard ECE Polychromater hubbard GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 01 2009 09:45AM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes system is functional and taking data Dec 05 2011 02:42PM (marmar) Earl Marmar H/D Ratio marmar HEAT no Breakers off and red tagged Apr 14 2011 11:27AM (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 Installed and aligned. Will be available for Ti/Vr profiles after focusing tests and locked modes are taken. Dec 06 2011 08:21AM (ypodpaly) John Rice High Resolution X-Ray cgao,ldelgado,rice,ypodpaly HXR yes 32 Channels operational,, no safety risk for in-vessel access Apr 14 2011 12:05PM (parker) Ron Parker Hard X-Ray Array faust,parker,schmidt ICRF D-Antenna no secured Apr 14 2011 08:55AM (wukitch) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna no secured Apr 14 2011 08:55AM (wukitch) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna no secured Apr 14 2011 08:56AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin Impurity Spectroscopy yes Being upgraded with better optics and new spectrographs. Dan Miller has primary responsibility. Apr 19 2011 11:46AM (blip) Bruce Lipshultz Measurement of recycling light and impurity source rates at multiple surfaces around the tokamak blip,miller Laser Blow-Off no Beamline disconnected Apr 14 2011 11:53AM (g) Martin Greenwald Impurity Injection System g,nthoward Lower Hybrid no LH HV Breaker Opened and Tagged, TPS Upgrade Underway Nov 10 2011 03:51PM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg Lower Hybrid Reflectometer no off Apr 15 2011 08:24AM (dominguez) Arturo Dominguez Lower Hybrid Reflectometer dominguez,marmar,parker,sgbaek LoWEUS yes LoWEUS working with the shot cycle. Viewing Mo line-emission normally covered by McPherson. Raw data only in tree. Dec 01 2011 02:54PM (mlreinke) Matthew L. Reinke Long Wavelength Extreme Ultraviolet Spectrometer markchil,mlreinke LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha no Midplane Lyman awaiting first plasma. B-PORT and LEDGE arrays installed but do not yet have amplifiers hooked up. Nov 17 2011 02:42PM (mlreinke) Matt Reinke Lyman alpha cameras faustian,labombard,mlreinke Magnetics yes   Dec 01 2011 11:51AM (g) Robert Granetz Bp coils and flux loops for equilibrium control granetz,wolfe McPherson no new turbo pump, installed, McP pumping down. Almost ready to open to machine. Dec 06 2011 12:16PM (mlreinke) Jim Terry VUV Spectrometer markchil,mlreinke,terry Michelson yes Front end at 4.5e-8 T. Reduced speed for initial operation. Nov 30 2011 07:51AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes   Dec 02 2011 12:27PM (toland) Brian LaBombard Baratron pressure gauges labombard,toland 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 1/3/2011: push-pull mechanism broken. MSE inoperative Jan 03 2012 11:47AM (sscott) Steve Scott Motional Stark Effect jinseok,sscott Neutrons yes High voltage is on. We're ready for plasma. Nov 21 2011 12:58PM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes All detectors Powered On --- Waiting for neutrons for calibration Nov 22 2011 01:05PM (irby) Jim Irby X-Ray/Neutron Detectors at K-Hor irby NINJA yes C-bottom and new F-bottom system ready. Dec 02 2011 12:28PM (toland) Brian LaBombard NINJA gas puff labombard,terry,toland PCI yes Operational. Nov 30 2011 12:45PM (ntsujii) Miklos Porkolab Phase Contrast Imaging emd,ennever,ntsujii,porkolab Penning Gauges yes Operational. High voltage comes on during INIT and off at RECOOL. Dec 09 2011 09:48AM (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 no Red tagged off Apr 12 2011 07:23AM (dekow) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby Power - PEI no Breaker opened and red tagged Apr 11 2011 11:59AM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX no Breakers opened and red tagged Apr 11 2011 12:00PM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems no All systems disabled for in-vessel entry Apr 14 2011 11:29AM (dekow) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby Probe Array - ISD yes Operational, except for probe #1 (open circuit) and probe #16 (not installed). Dec 09 2011 09:50AM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH yes Operational, except for bottom-D probe (open circuit). Dec 09 2011 09:52AM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes F-divertor ok. J-divertor ok, except for JDIV_06 which is shorted out. Dec 09 2011 09:54AM (labombard) Brian LaBombard Outer Lower Divertor Probe Array (F and J) labombard Probe Array - UDIV yes Operational except for probes #4, 5 and 13 (open) Dec 09 2011 09:56AM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes Starting on 1111215009, the 50, 60 75, 88l and 88u are online. The 112, 140 and variable are still disconnected. Dec 15 2011 10:53AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Ion Sensitive Probe head installed. Testing in piggy-back mode. Dec 20 2011 12:33PM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Operational. Dec 09 2011 09:57AM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP yes A-port WASP is operational. K-port WASP is dead (all probes melted together). Dec 09 2011 09:58AM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick Shoelace Antenna yes Passive mode only Dec 13 2011 02:48PM (g) Brian LaBombard High-k active MHD antenna, for QCM, WCM studies golfit,labombard SOL reflectometer yes c-port waveguides operational, h-port waveguides are not. Nov 29 2011 12:04PM (cornwall) Cornwall Lau SOL reflectometer cornwall,wukitch,ylin Sparker yes New Type II sparker replaced Type I on 11/17/2011 Nov 23 2011 08:53AM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin Surface Science Station no SSS is up to air, no safety issues Apr 14 2011 12:06PM (ochoukov) Bruce Lipschultz Radially scanning probe located on K-port blip,ochoukov TCI yes TCI Operational. Density feedback operational. Nov 10 2011 11:47AM (irby) Jim Irby Two-Color Interferometer irby,murray TS - Core no All lasers are shut down and cannot be fired into cell. Apr 11 2011 01:20PM (jwhughes) Jerry Hughes Core Thomson scattering jrwalk,jwhughes,yma TS - Edge no All lasers are shut down and cannot be fired into cell. Apr 11 2011 01:20PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jrwalk,jwhughes,yma Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf XEUS yes XEUS working with the shot cycle. Viewing low-Z emission. Dec 01 2011 02:55PM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer markchil,mlreinke XTOMO yes ARRAY1->4 waiting first plasma, new core ARRAY5 needs debugging and the calibration data checked Nov 17 2011 02:44PM (mlreinke) Robert Granetz X-Ray Tomography faustian,granetz,mlreinke