Miniproposals

Miniproposal: 570 Date Filed: 8/21/2009 Title: Boundary layer heat transport experiments in L-mode plasmas First Author: Brian Labombard Session Leader: Brian Labombard (shots 1-32)

Engineering Operator Run Comment

MP#570 - Boundary layer heat transport experiments in L-mode plasmas SL

Session Leader Plans

Entered: Sep 22 2009 01:36:10:430PM

Author: Brian Labombard

Run Plan for 1090923 MP#570 - Boundary layer heat transport experiments in L-mode plasmas Goal Our first goal today is to complete the 2.7 tesla entries in Table 1 of the MP. With luck, we will complete this in the first half of the run. Then we will start on a series of ICRF power scan discharges at 0.8 MA and 5.4 tesla at various densities ('run number 5' in Table 1 of the MP). Setup Reload from shot#1090910024. This was a NL04 ~ 0.34e20, 0.4 MA shot with TF ramping down to 4 tesla from 5.4. This shot used Steve Wolfe's OH1 cross-over glitch controller. It also had a slow ramp in RXL to sweep the strike-point across the outer divertor. Import segment#1 from 1090710008 - low field startup. Set engineering parameters based on this shot. Program toroidal field to 2.7 tesla and plasma current to 0.4 MA in other segments. NINJA should be filled to 8 PSI D2. Tweak the RXL sweep so that probe#8 on the outer divertor goes into the private flux region. A. LSN, 2.7 tesla, 0.4 MA, Ohmic NL04~ 0.35, 0.45, 0.55, 0.65e20 Two shots at each density, probes scanning to resolve shear layer. If the low-field startup looks like a problem, we will reload from 1090910024 and program the field to ramp down to 2.7 tesla. The strike-point sweep will need to happen much later in time, affecting the ability to do GPI on every shot. B. LSN, 5.4 tesla, 0.8 MA, ICRF power scans Reload shot#5 from 1090825 Tweak RXL so that probe#8 on the outer divertor goes into private zone. NL04: ~ 0.4 RF: 0 MW - 2 shots (first with NINJA, second without) RF: 0.6 MW - 2 shots RF: 1.2 MW - 2 shots NL04: ~ 0.6 ... NL04: ~ 0.8 ... NL04: ~ 1.0 ... NL04 ~ 1.2 ...

Physics Operators Plans

Entered: Sep 22 2009 02:53:10:920PM

Author: Bill Rowan

----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on:1090710008 Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled Gas setup: Fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill NINJA with 8 psi D2 DISABLED Enable gatevalves and shutters: ECE, VUV, DNB, Z-bolo Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): yes ICRF(yes/no): yes LH(yes/no): no DNB(yes/no): if available Cryopump (yes/no): no Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: He at 5e-5 Torr sweep: 44/45/103 cm scan: 20/120 s

Session Leader Summaries

Entered: Sep 23 2009 10:20:01:053PM

Author: Brian Labombard

Run Summary for 1090923 MP#570 "Boundary layer heat transport experiments in L-mode plasmas" This was another successful run for the MP, completing the 2.7 tesla ohmic density scan and getting a good start on a set of 5.4 tesla, RF-heated L-mode plasmas. In order to set up the 0.4 MA, 2.7 tesla discharges, we employed a low-field start-up program developed recently by Ian. Initially, there was some concern that we would not be able to reproduce Ian's 'magic touch' at the controls and would just bang our heads against a string of fizzles/duds. Instead, the gamble paid off. Apart from shot#1 (an early disruption) every low-field startup attempt went on to produce a useful plasma - 15 shots in a row. So low-field start-up is definitely a new tool that we should not be afraid to use. It was particularly helpful today because we wanted to establish the 2.7 tesla flattop early (before 0.5s) so that we could make the most use of a strike-point sweep. Steve Wolfe's cross-over control algorithm was also employed, keeping the left gap open during this even with a manageable level of gap wobble. By shot #5 we had optimized the strike-point sweep up the divertor plate such that the 'nose' Langmuir probe (#8 ) recorded the full SOL profile -- common-flux region, strike-point and private-flux regions. This was important as it was noted in earlier runs that the pressure profile measured by 'vertical plate' probes is different from the 'nose' probe, likely involving the differences in field line angles striking the divertor plate. Heat fluxes were low in the 0.4 MA shots, so we relied heavily on the divertor sensors for these. On shot#17 we turned our attention back to standard 5.4 tesla, 0.8 MA shots with the idea of adding RF to change the footprint power loading. Now the IR camera started to record profiles. Although the strike-point sweep was great for Langmuir probes and heat-flux sensors (Dan reported some clean temperature rises on surface TCs #3 an #5), it was not so good for generating a simple IR camera picture of the footprint. As the strike-point runs up the plate it lights up various tile sensors in an irregular way, blending with some reflected plasma light near the nose tile. Also, because the sweep reduces the temperature excursion on the plate by spreading the heat flux, the IR signal tends to stay low. Despite these warts, we kept on with the strike-point sweeping program. However, we will want to go back to a fixed strike-point later to let the tiles heat up to generate a nice IR signature. As expected, the ICRF-heated shots were a challenge for the scanning probes today. Sheath-rectification effects were evident on the ASP and FSP as high Te values were recorded in the far SOL. Yet the WASP on the inner wall appeared to be immune to the RF, recording clean Te profiles and regularly poking past the LCFS. An additional wrinkle has the that FSP appeared to pipe RF noise into the F-Port rack system, causing the cPCI systems to do crazy things like putting power supplies into a standby mode halfway through the shot. For this reason, we left it off after shot#23 (no more entertainment on the video monitor). The ASP was pushed to its limits also, on the verge of overheating in the later shots. This required a number of embarrassingly small tweaks to the right gap, which Bill accommodated without complaint. H-modes were a problem today - we did not want them but got them without trying. They tended to occur late in the shot (> 1 s) at very low RF power, 0.5 MW, at the lowest densities (21,23,24,27). They would spoil the footprint because they would occur before the strike-point sweep was completed. I don't remember attaining H-modes under these conditions at such low power. Also, we had the strike-point on the 'nose' tile, a location where the power threshold was found to increase during recent runs. Anyway, these pesky H-modes restricted the amount of RF that we could inject so we only got a two-point power scan, 0 and 0.4 MW, for NL04 < 0.8. For NL04 ~ 0.82 we were on our way to get a three-point power scan (0, 0.4, 0.8MW). However, the ASP was inserted too far for the 0.8 MW case and the plasma disrupted shortly thereafter. Shot Log: 1- early disruption 2-LSN,4.0T,0.4MA,NL04~0.33, no probes scanning. 3-LSN,3.3T,0.4MA,NL04~0.33, ASP(0),FSP(-10),WASP(7V) @ 0.6, 0.9, 1.2s 4-LSN,2.8T,0.4MA,NL04~0.35, ASP(+5),FSP(-7),WASP(7V) @ 0.6, 0.9, 1.2s 5-LSN,2.8T,0.4MA,NL04~0.35, ASP(+5),FSP(-5),WASP(9,10,12V) @ 0.6, 0.9, 1.2s Probes need to be deeper Excellent x-pt sweep. LP#8 maps out full profile 6-LSN,2.8T,0.4MA,NL04~0.36, ASP(+7),FSP(-3),WASP(11,13,15V) @ 0.6, 0.9, 1.3s ASP could be deeper, else pretty good. 7-LSN,2.8T,0.4MA,NL04~0.36, ASP(+8.5),FSP(-3),WASP(11,13,15V) @ 0.6, 0.9, 1.3s Boron coating finally comes off ASP. Best data is last two scans. 8-LSN,2.8T,0.4MA,NL04~0.45, ASP(+8.5),FSP(-1),WASP(11,13,15V) @ 0.6, 0.9, 1.3s F-port power supplies stayed in standby on this shot. No FSP or WASP data 9-LSN,2.8T,0.4MA,NL04~0.47, ASP(+10.5),FSP(-1),WASP(11,13,15V) @ 0.6, 0.9, 1.3s F-port supplies back. FSP not deep enough. 10-LSN,2.8T,0.4MA,NL04~0.47, ASP(+10.5),FSP(+1),WASP(11,13,17V) @ 0.6, 0.9, 1.3s Nice data. 11-LSN,2.8T,0.4MA,NL04~0.57, ASP(+10.5),FSP(+1),WASP(11,13,17V) @ 0.6, 0.9, 1.3s FSP could be deeper 12-LSN,2.8T,0.4MA,NL04~0.57, ASP(+10.5),FSP(+3),WASP(11,14,18V) @ 0.6, 0.9, 1.3s Nice data. 13-LSN,2.8T,0.4MA,NL04~0.65, ASP(+10.5),FSP(+3),WASP(11,14,18V) @ 0.6, 0.9, 1.3s WASP could be deeper 14-LSN,2.8T,0.4MA,NL04~0.64, ASP(+10.5),FSP(+3.5),WASP(13,16,20V) @ 0.6, 0.9, 1.3s 15-LSN,2.8T,0.4MA,NL04~0.7, ASP(+12),FSP(+5),WASP(13,16,22V) @ 0.6, 0.9, 1.3s F-port DT191_01 - no data. 16-LSN,2.8T,0.4MA,NL04~0.72, ASP(+12.5),FSP(+6),WASP(13,16,22V) @ 0.6, 0.9, 1.3s Change to 5.4 tesla, 0.8 MA 17-LSN,5.5T,0.8MA,NL04~0.68 no probes scanning 18-LSN,5.5T,0.8MA,NL04~0.52, ASP(+8),FSP(-12),WASP(14,16,18V) @ 0.6, 0.9, 1.3s WASP was not enabled. Target drifts away from ASP 19-LSN,5.5T,0.8MA,NL04~0.45, ASP(+8),FSP(-12),WASP(14,16,18V) @ 0.6, 0.9, 1.3s FSP too deep on last scan ASP not reaching on last scan. 20-LSN,5.5T,0.8MA,NL04~0.47, ASP(+8),FSP(-12),WASP(13.5,16,18V) @ 0.6, 0.9, 1.3s WASP - excellent FSP, ASP could be deeper Add 0.6 MW RF next 21-LSN,5.5T,0.8MA,NL04~0.47, ASP(+8),FSP(-12),WASP(13.5,16,18V) @ 0.6, 0.95, 1.3s 0.6 MW RF (D&E) No data from F-port Langmuir probes. Xantrex supplies go into standby mode during shot, CPCI gets gronked - likely RF pickup from FSP H-mode at 1.14 s 22 - early disruption 23-LSN,5.5T,0.8MA,NL04~0.47, ASP(+8), WASP(13.5,16,18V) @ 0.6, 0.95, 1.3s FSP not scanning. It may be causing RF pickup in F-port rack so leave it off for now. 0.5 MW RF (D & E) H-mode at 1.3s More power to divertor plate. 24-LSN,5.5T,0.8MA,NL04~0.47, ASP(+9), WASP(13.5,16,18V) @ 0.6, 0.95, 1.3s 0.5 MW RF (D & E) H-mode at 1.3s Excellent WASP and ASP data. ASP sees sheath-rectification effects - high Te in far SOL WASP is does not appear to be affected by RF. 25- no power shot 26-LSN,5.5T,0.8MA,NL04~0.68, ASP(+9), WASP(13.5,16,18V) @ 0.6, 0.95, 1.3s No RF. Excellent WASP and ASP data. 27-LSN,5.5T,0.8MA,NL04~0.68, ASP(+9), WASP(13.5,16,18V) @ 0.6, 0.95, 1.3s 0.5 MW RF ASP deep on first scan. H-mode at 1 second - spoils footprint mapping Next: reduce RF power to 0.4 MW 28-LSN,5.5T,0.8MA,NL04~0.7, ASP(+8.5), WASP(13.5,16,18V) @ 0.6, 0.95, 1.3s ASP a bit deep on first scan. 0.44 MW RF (D & E) no H-mode 29-LSN,5.5T,0.8MA,NL04~0.82, ASP(+8.5), WASP(13.5,16,18V) @ 0.6, 0.95, 1.3s No RF. again, ASP a bit deep on first scan. ASP SE electrode - no dt216 data 30-LSN,5.5T,0.8MA,NL04~0.82, ASP(+8.0), WASP(13.5,16,18V) @ 0.6, 0.95, 1.3s ASP a bit deep on first scan. 0.2 MW RF (E only) 31-LSN,5.5T,0.8MA,NL04~0.82, ASP(+7.5), WASP(13.5,16,18V) @ 0.6, 0.95, 1.3s Great targeting 0.4 MW (E only) 32-LSN,5.5T,0.8MA 0.8 MW (E only) Disrupts at 0.6 seconds. ASP too deep.

Physics Operator Summaries

Entered: Sep 24 2009 09:35:54:027AM

Author: Bill Rowan

During this run, there was a density scan at low field (2.9T) and a density and small RF power scan at 5.4T. Later shots at 5.4 T generated H-modes at even the low RF power applied (0.4 MW). Since low density discharges were requested for the first shots, ECDC was in helium. The requested densities were easily achieved at the lower TF that we started with. Later in the day and at higher TF, the lowest requested density was not obtained although the gas valve seemed to be turned off during the discharge. The recently-developed low field start up was used for the low field part of the run. (Reference 1090710008) The requested setup required an extensive strike-point scan at low TF, and the usual technique of starting at 5.4 T and then reducing the field would not have left sufficient time for the strike-point scan. The low field startup was modified by starting the TF at -1.0 s instead of -0.5 s. The intent was to avoid problems with coax resistance in the low field startup. This seemed to have helped. The strike-point scan was accomplished with simultaneous radial and vertical motion of the lower x-point. The most extreme scan was approximately 4 cm radially and two cm vertically. There were three disruptions during the day. The initial attempt to operate at 2.7 T resulted in a disruption (001). Without much reflection, the field was increased to 2.9 T (also acceptable to the SL), and shot 002 did not disrupt. shot 022 disrupted after lowering the density. The density was increased on the following shot and the disruption did not repeat. Shot 032 disrupted and was possibly due to a probe interaction. Score card 31 plasmas, 3 disruptions (001,022,02) 01 no power shot -- computer problem 0 fizzles 0 duds 32 total

Session Leader Comments
Sep 23 2009 10:09:40:917AM	1090923002	Brian Labombard	2-LSN,4.0T,0.4MA,NL04~0.33, no probes scanning.
Sep 23 2009 10:09:54:633AM	1090923003	Brian Labombard	3-LSN,3.3T,0.4MA,NL04~0.33, ASP(0),FSP(-10),WASP(7V) @ 0.6, 0.9, 1.2s
Sep 23 2009 10:11:27:807AM	1090923004	Brian Labombard	4-LSN,2.8T,0.4MA,NL04~0.35, ASP(+5),FSP(-7),WASP(7V) @ 0.6, 0.9, 1.2s increased x-pt sweep by 1 cm in RXL
Sep 23 2009 10:26:25:230AM	1090923005	Brian Labombard	5-LSN,2.8T,0.4MA,NL04~0.35, ASP(+5),FSP(-5),WASP(9,10,12V) @ 0.6, 0.9, 1.2s Probes need to be deeper Excellent x-pt sweep. LP#8 maps out full profile
Sep 23 2009 10:40:57:073AM	1090923006	Brian Labombard	6-LSN,2.8T,0.4MA,NL04~0.36, ASP(+7),FSP(-3),WASP(11,13,15V) @ 0.6, 0.9, 1.3s ASP could be deeper, else pretty good.
Sep 23 2009 11:12:17:947AM	1090923007	Brian Labombard	7-LSN,2.8T,0.4MA,NL04~0.36, ASP(+8.5),FSP(-3),WASP(11,13,15V) @ 0.6, 0.9, 1.3s Boron coating finally comes off ASP. Best data is last two scans.
Sep 23 2009 11:12:34:260AM	1090923008	Brian Labombard	8-LSN,2.8T,0.4MA,NL04~0.45, ASP(+8.5),FSP(-1),WASP(11,13,15V) @ 0.6, 0.9, 1.3s F-port power supplies stayed in standby on this shot. No FSP or WASP data
Sep 23 2009 11:30:39:963AM	1090923009	Brian Labombard	9-LSN,2.8T,0.4MA,NL04~0.47, ASP(+10.5),FSP(-1),WASP(11,13,15V) @ 0.6, 0.9, 1.3s F-port supplies back. FSP not deep enough.
Sep 23 2009 11:42:17:823AM	1090923010	Brian Labombard	10-LSN,2.8T,0.4MA,NL04~0.47, ASP(+10.5),FSP(+1),WASP(11,13,17V) @ 0.6, 0.9, 1.3s Nice data
Sep 23 2009 12:08:20:320PM	1090923011	Brian Labombard	11-LSN,2.8T,0.4MA,NL04~0.57, ASP(+10.5),FSP(+1),WASP(11,13,17V) @ 0.6, 0.9, 1.3s FSP could be deeper
Sep 23 2009 12:08:40:883PM	1090923012	Brian Labombard	12-LSN,2.8T,0.4MA,NL04~0.57, ASP(+10.5),FSP(+3),WASP(11,14,18V) @ 0.6, 0.9, 1.3s Nice data.
Sep 23 2009 01:14:12:337PM	1090923013	Brian Labombard	13-LSN,2.8T,0.4MA,NL04~0.65, ASP(+10.5),FSP(+3),WASP(11,14,18V) @ 0.6, 0.9, 1.3s WASP could be deeper
Sep 23 2009 01:14:27:243PM	1090923014	Brian Labombard	14-LSN,2.8T,0.4MA,NL04~0.64, ASP(+10.5),FSP(+3.5),WASP(13,16,20V) @ 0.6, 0.9, 1.3s
Sep 23 2009 01:14:48:493PM	1090923015	Brian Labombard	15-LSN,2.8T,0.4MA,NL04~0.7, ASP(+12),FSP(+5),WASP(13,16,22V) @ 0.6, 0.9, 1.3s F-port DT191_01 - no data
Sep 23 2009 01:49:01:603PM	1090923016	Brian Labombard	16-LSN,2.8T,0.4MA,NL04~0.72, ASP(+12.5),FSP(+6),WASP(13,16,22V) @ 0.6, 0.9, 1.3s Change to 5.4 tesla, 0.8 MA
Sep 23 2009 01:49:14:947PM	1090923017	Brian Labombard	17-LSN,5.5T,0.8MA,NL04~0.68 no probes scanning
Sep 23 2009 04:02:30:103PM	1090923018	Brian Labombard	18-LSN,5.5T,0.8MA,NL04~0.52, ASP(+8),FSP(-12),WASP(14,16,18V) @ 0.6, 0.9, 1.3s WASP was not enabled Target drifts away from ASP
Sep 23 2009 04:02:46:273PM	1090923019	Brian Labombard	19-LSN,5.5T,0.8MA,NL04~0.45, ASP(+8),FSP(-12),WASP(14,16,18V) @ 0.6, 0.9, 1.3s FSP too deep on last scan ASP not reaching on last scan
Sep 23 2009 04:02:57:167PM	1090923020	Brian Labombard	20-LSN,5.5T,0.8MA,NL04~0.47, ASP(+8),FSP(-12),WASP(13.5,16,18V) @ 0.6, 0.9, 1.3s WASP - excellent FSP, ASP could be deeper Add 0.6 MW RF next
Sep 23 2009 04:09:18:900PM	1090923021	Brian Labombard	21-LSN,5.5T,0.8MA,NL04~0.47, ASP(+8),FSP(-12),WASP(13.5,16,18V) @ 0.6, 0.9, 1.3s 0.6 MW RF (D&E) No data from F-port Langmuir probes. Xantrex supplies go into standby mode during shot, CPCI gets gronked - likely RF pickup from FSP H-mode at 1.14 s
Sep 23 2009 04:09:30:870PM	1090923023	Brian Labombard	23-LSN,5.5T,0.8MA,NL04~0.47, ASP(+8), WASP(13.5,16,18V) @ 0.6, 0.9, 1.3s FSP not scanning. It may be causing RF pickup in F-port rack so leave it off for now. 0.5 MW RF (D & E) H-mode at 1.3s More power to divertor plate
Sep 23 2009 04:09:42:133PM	1090923024	Brian Labombard	24-LSN,5.5T,0.8MA,NL04~0.47, ASP(+9), WASP(13.5,16,18V) @ 0.6, 0.9, 1.3s 0.5 MW RF (D & E) H-mode at 1.3s Excellent WASP and ASP data. ASP sees sheath-rectification effects - high Te in far SOL WASP is does not appear to be affected by RF.
Sep 23 2009 04:10:09:337PM	1090923026	Brian Labombard	26-LSN,5.5T,0.8MA,NL04~0.68, ASP(+9), WASP(13.5,16,18V) @ 0.6, 0.99, 1.3s Excellent WASP and ASP data.
Sep 23 2009 04:10:51:133PM	1090923027	Brian Labombard	27-LSN,5.5T,0.8MA,NL04~0.68, ASP(+9), WASP(13.5,16,18V) @ 0.6, 0.99, 1.3s ASP deep on first scan. H-mode at 1 second - spoils footprint mapping Next: reduce RF power to 0.4 MW
Sep 23 2009 04:21:54:277PM	1090923028	Brian Labombard	28-LSN,5.5T,0.8MA,NL04~0.7, ASP(+8.5), WASP(13.5,16,18V) @ 0.6, 0.99, 1.3s ASP a bit deep on first scan. 0.44 MW RF (D & E) no H-mode
Sep 23 2009 04:37:41:790PM	1090923029	Brian Labombard	29-LSN,5.5T,0.8MA,NL04~0.82, ASP(+8.5), WASP(13.5,16,18V) @ 0.6, 0.95, 1.3s No RF. Again, ASP a bit deep on first scan.
Sep 23 2009 04:54:22:120PM	1090923030	Brian Labombard	30-LSN,5.5T,0.8MA,NL04~0.82, ASP(+8.5), WASP(13.5,16,18V) @ 0.6, 0.95, 1.3s ASP deep on first scan. 0.2 MW RF (E only)
Sep 23 2009 05:21:16:233PM	1090923031	Brian Labombard	31-LSN,5.5T,0.8MA,NL04~0.82, ASP(+7.5), WASP(13.5,16,18V) @ 0.6, 0.95, 1.3s Great targeting 0.4 MW (E only)
Sep 23 2009 05:21:28:263PM	1090923032	Brian Labombard	32-LSN,5.5T,0.8MA 0.8 MW (E only) Disrupts at 0.6 seconds. ASP too deep

Physics Operator Comments
Sep 23 2009 08:27:10:430AM		Bill Rowan	verified that ECDC was in helium as requested loaded 1090910024 as requested by SL imported segment 1090710008 to pick up the low field startup increased prefill (PG4 in seg 1) from 17 ms to 24 ms to match prefill on 1090922003 Reset plateau TF to 2.7 T (74250A) to match SL request The low field startup segment 1 ends at 96000 so set the starting point of segment 2 to 96000 Verified IP set to 0.4 MA
Sep 23 2009 08:51:14:777AM		Bill Rowan	Change TF start to -1.0s from -0.5. Programmed a flat top from -1.0 to 0.0 Change the engineering timing as well
Sep 23 2009 09:13:33:463AM	1090923001	Bill Rowan	001. Startup worked. Disruption at 0.35 s Next shot. Increase BT to 3.7 T which was the original setting for this segment.
Sep 23 2009 09:28:11:790AM	1090923002	Bill Rowan	002. Plasma ran full length Next shot. BT = 3.2T (90000A)
Sep 23 2009 09:32:03:947AM	1090923002	Bill Rowan	Changed the x-point sweep. added 1 cm to rxl at end of sweep
Sep 23 2009 09:47:43:137AM	1090923003	Bill Rowan	003. Plasma ran full length Bt = 3.3 T Next shot. BT = 2.7 t (75000)
Sep 23 2009 09:49:59:743AM	1090923003	Bill Rowan	Changed the x-point sweep. added 1 cm to rxl at end of sweep
Sep 23 2009 09:50:39:430AM	1090923003	Bill Rowan	plc/hardware fizzle detector to 2.1 s OH supply inversion times to 2.3 s
Sep 23 2009 10:04:45:523AM	1090923004	Bill Rowan	004. Plasma ran full length Bt = 2.9 T Next shot No PCS changes
Sep 23 2009 10:14:22:540AM	1090923005	Bill Rowan	005. Plasma Runaways evident Next shot Add 2 ms to prefill: 26 ms
Sep 23 2009 10:27:04:760AM	1090923006	Bill Rowan	006. Plasma
Sep 23 2009 10:38:37:730AM	1090923006	Bill Rowan	Next shot. No pcs changes
Sep 23 2009 10:46:19:447AM	1090923007	Bill Rowan	007. Plasma Next shot. increase nl_04 from 0.35e+20 to 0.45e+20
Sep 23 2009 11:00:00:773AM	1090923008	Bill Rowan	008. Plasma nl_04 averages 0.45
Sep 23 2009 11:12:47:590AM	1090923008	Bill Rowan	Next shot. No pcs changes
Sep 23 2009 11:27:56:930AM	1090923009	Bill Rowan	009. Plasma Next shot. No pcs changes
Sep 23 2009 11:34:59:947AM	1090923010	Bill Rowan	010. Plasma Next shot increase nl_04 from 0.45 to 0.55
Sep 23 2009 11:56:58:073AM	1090923011	Bill Rowan	011. Plasma nl_04 averages 0.55 Next shot No PCS changes
Sep 23 2009 12:00:44:917PM	1090923012	Bill Rowan	012. Plasma Next shot. increase nl_04 from 0.55 to 0.65
Sep 23 2009 12:14:36:260PM	1090923013	Bill Rowan	013. Plasma Next shot. No PCS changes
Sep 23 2009 12:31:54:027PM	1090923014	Bill Rowan	014. Plasma
Sep 23 2009 12:36:48:023PM	1090923014	Bill Rowan	014. Plasma Next shot increase nl_04 from 0.65 to 0.70
Sep 23 2009 12:47:16:947PM	1090923015	Bill Rowan	015. Plasma
Sep 23 2009 12:49:17:807PM	1090923015	Bill Rowan	Next shot. No PCS changes
Sep 23 2009 01:10:55:637PM	1090923016	Bill Rowan	016. Plasma
Sep 23 2009 01:25:06:400PM	1090923016	Bill Rowan	next shot load 1090825005 into pcs this is also the new engineering shot load segment 1 from 1090922003 changed rxl to match that on shot 015 to produce the x-point scan required by SL
Sep 23 2009 01:35:37:057PM	1090923017	Bill Rowan	017. Plasma ip = 0.8 MA nl_04 = 0.65e+20 Bt = 5.5 T
Sep 23 2009 01:42:52:777PM	1090923017	Bill Rowan	Next shot. No PCS changes
Sep 23 2009 02:06:14:243PM	1090923018	Bill Rowan	Next shot. decrease outer gap in a ramp from 0.5 to 1.5 s
Sep 23 2009 02:09:45:510PM	1090923019	Bill Rowan	019. Plasma Next shot. decrease outer gap again increase zxl by 5 mm in a ramp from 0.5 to 1.5
Sep 23 2009 02:23:20:167PM	1090923020	Bill Rowan	020. Plasma next shot. increase zxl by an additional 5 mm in a ramp from 0.5 to 1.5 decrease outer gap again
Sep 23 2009 02:35:10:603PM	1090923021	Bill Rowan	021. Plasma. dithering h-mode Next shot decrease nl_04 demand from 0.4e+20 to 0.35e+20
Sep 23 2009 02:36:28:057PM	1090923021	Bill Rowan	increase outer gap slightly
Sep 23 2009 03:24:46:930PM	1090923023	Bill Rowan	023. Plasma
Sep 23 2009 03:24:12:917PM	1090923024	Bill Rowan	024. Plasma Next shot Increase nl_04 to 0.65e+20
Sep 23 2009 03:37:19:340PM	1090923025	Bill Rowan	025. No power shot
Sep 23 2009 03:49:11:070PM	1090923026	Bill Rowan	026. Plasma Next shot. No PCS changes
Sep 23 2009 04:07:06:900PM	1090923027	Bill Rowan	027. Plasma. H-mode at 1 s Next shot No PCS changes
Sep 23 2009 04:20:47:120PM	1090923028	Bill Rowan	028. Plasma. No h-mode Next shot Increase nl_04 demand by 0.2e+20
Sep 23 2009 04:32:02:027PM	1090923029	Bill Rowan	029. Plasma nl_04 = 0.83e+20 next shot. Slight reduction in outer gap
Sep 23 2009 04:49:48:527PM	1090923030	Bill Rowan	030. Plasma Next shot. Slight reduction in outer gap
Sep 23 2009 05:00:27:197PM	1090923031	Bill Rowan	031. Plasma Next shot No pcs changes
Sep 23 2009 05:16:14:660PM	1090923032	Bill Rowan	032. Plasma. disruption at 0.6 s might be a probe Last shot.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:57:23:977AM	Plasma	Ok
2	09:16:59:807AM	Plasma	Ok
3	09:34:27:853AM	Plasma	Ok
4	09:52:07:417AM	Plasma	Ok
5	10:05:32:010AM	Plasma	Ok
6	10:24:47:573AM	Plasma	Ok
7	10:38:42:680AM	Plasma	Ok
8	10:52:51:917AM	Plasma	Ok
9	11:15:53:400AM	Plasma	Ok
10	11:28:47:353AM	Plasma	Ok
11	11:41:31:730AM	Plasma	Ok
12	11:55:21:447AM	Plasma	Ok
13	12:09:43:773PM	Plasma	Ok
14	12:22:24:557PM	Plasma	Ok
15	12:41:51:417PM	Plasma	Ok
16	01:08:41:370PM	Plasma	Ok
17	01:28:24:353PM	Plasma	Ok
18	01:45:09:387PM	Plasma	Ok
19	02:00:33:120PM	Plasma	Ok
20	02:13:20:150PM	Plasma	Ok
21	02:27:48:917PM	Plasma	Ok
22	02:45:15:523PM	Plasma	Ok
23	02:59:08:743PM	Plasma	Ok
24	03:12:33:277PM	Plasma	Ok
25	03:33:18:260PM	Plasma	Ok
26	03:45:13:213PM	Plasma	Ok
27	03:58:08:447PM	Plasma	Ok
28	04:12:12:213PM	Plasma	Ok
29	04:25:35:197PM	Plasma	Ok
30	04:41:39:727PM	Plasma	Ok
31	04:56:22:103PM	Plasma	Ok
32	05:13:35:560PM	Plasma	Ok

System Availability

Sep 23 2009 08:56:59:070AM

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 7 horizontal views spread out R_maj=[0.72-0.9m], 3 cm over the tokamak midplane (beam) Jul 09 2009 05:12PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes 2pi (diode+foil), AXA, AXJ, WB3AX, WB4AX, LEDGE-AX working fine. MID-FOILS working fine. The LEDGE/DIV foils still need calibrations applied Aug 27 2009 09:09AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization no Bottle Removed from the Cell, Piezo box on Igloo Removed. System in safe mode for In-Vessel Access May 30 2008 02:25PM (dekow) Jim Irby Boronization dekow,irby CNPA no Single channel CNPA available as of 12/1707 Jun 10 2009 10:22AM (twf) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor no Cyopump hardware is not yet reinstalled in the cell. Jul 14 2009 09:21PM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard CXRS yes The wide-view toroidal array was installed, spatially and absolutely calibrated. There are 7 toroidal chords intersect the beam at the major_R_range=[74.2:83.6]cm. Spatial resolution: 1.2 cm. The F-top wide-view poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[0.65:0.9.]m. Spatial resolution: 1.22 cm. Jul 09 2009 05:16PM (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 and operating; not yet calibrated Jul 14 2009 02:22PM (marmar) Earl Marmar Visible Bremsstrahlung marmar Disruption Mitigation no safely disabled; ready to be dismantled May 28 2008 10:22AM (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 power locked & tagged out; gate valve disabled May 28 2008 10:03AM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,gung ECDC no 6/10/09 Magnetron relocated to west wall in cell at H-port. All controls and hardware have been installed but need to be tested prior to full operation. Magnetron Unplugged and Red tagged, PEI breaker red tagged, Safe for In-Vessel Activity Jun 10 2009 02:35PM (dekow) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE yes The lower freq. 16 channels are ready. Still need calibration and signal level adjustments Jul 14 2009 12:15PM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips G-Side Ratiomatic yes Gauge installed. Controller repaired. Aug 23 2009 10:36PM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no 6/10/09: Paddles meggered at 1000 v to machine ground (>300 Mohm) prior to closing the vacuum chamber. Plugs for Power Supply and Controls Unplugged and Red Tagged, Safe for In-Vessel Access Jun 10 2009 01:47PM (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. Jul 28 2009 04:23PM (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 poses no safety hazard for people working around the machine Jun 18 2009 01:04PM (marmar) Earl Marmar H/D Ratio marmar HEAT no Disconnect switch is open, reg tagged and locked. Shunt Trip Breaker is opened. Safe for in-vessel work. Jun 04 2008 12:24PM (dekow) Gary Dekow - Machine Heaters - burke,dekow Hirex Jr yes Hirex-Jr has been installed and tested Jun 17 2009 11:54AM (rice) John Rice High Resolution X-Ray ince,rice Hirex Sr yes currently only one detector is operational, off-axis He-like argon emission Jul 14 2009 10:01AM (rice) John Rice High Resolution X-Ray ince,rice HXR no In safe mode (high voltage turned off) May 27 2008 09:19PM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt ICRF D-Antenna yes operational at 80 MHz Jul 21 2009 04:49PM (wukitch) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna yes antenna and FFT operational Jul 21 2009 04:49PM (wukitch) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes available at 80 MHz and [0,pi,0,pi] phasing Sep 04 2009 10:01AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin Lower Hybrid no Breaker locked and tagged out. Waveguide disassembly started. Open Waveguides have been shorted. May 28 2008 09:47AM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha yes Midplane, WB4-LY, LEDGE-LY all collecting data. WB1-LY not attached. Aug 27 2009 09:10AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke McPherson yes Operating normally Aug 27 2009 09:10AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry Michelson yes Operational. Recalibrated 7/27/09. Jul 28 2009 04:22PM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes Gauges are on. B-bottom is not operating - bad sensor head? Jul 14 2009 09:12PM (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 Neutron detectors are calibrated and ready to go. Voltages will be turned on prior to first plasma. Jun 10 2009 10:35AM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes Operational --- Uncalibrated and needs to be positioned at port Jun 25 2009 05:08PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby NINJA no Capillaries were tested in-vessel. Plenum has a leak and needs fixing. Jul 14 2009 09:14PM (labombard) Brian LaBombard NINJA gas puff labombard,terry PCI yes Operational. Sep 08 2009 02:30PM (ntsujii) Miklos Porkolab Phase Contrast Imaging arai,edlund,ennever,ntsujii,porkolab Penning Gauges yes High voltage is enabled (on during INIT, off during RECOOL). Jun 30 2009 09:42PM (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 Checked and Operational as of 06/18/09 Jun 19 2009 08:04AM (irby) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby Power - PEI yes Operational ---- ECDC running as required Jun 19 2009 08:06AM (irby) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby Probe Array - ISD yes Array is operational with new cPCI data system. Probe 14 has open circuit. Jul 14 2009 09:17PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH no LH launcher not installed. Cables are unplugged at the A-port rack. Jul 14 2009 09:16PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes Array is operational with new cPCI data system. Jul 14 2009 09:16PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard Probe Array - UDIV yes Array is operational with new cPCI data system. Probe 13 has a bad cable (open). Jul 14 2009 09:17PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes Since 1090824xxx, all channels are operational. Aug 25 2009 09:31AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP yes System connected to A-port WASP. Needs plasma testing. Jul 14 2009 09:19PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick Sparker yes Sparker now at K-Hor. Set for 100 uA of current. Will up to 200 uA before first plasma Jun 18 2009 01:01PM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin TCI yes System restarted and aligned. Several chords available including NL04. Density Feedback available. Ready for plasma. Jun 18 2009 09:15AM (murray) Jim Irby Two-Color Interferometer irby,murray TS - Core yes 2 lasers working. 15 spatial channels operational. Initial (NOT final) Te calibration applied. ***No ne calibration yet*** Aug 05 2009 08:44AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma,zhang TS - Edge yes Operational, Te calibration is thought to be good. Density is ***uncalibrated*** Aug 11 2009 02:31PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma,zhang Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf XTOMO yes Operating normally Aug 27 2009 09:10AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke