| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Earl Marmar |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Bill Parkin,Bill Byford |
| Engineering Operator Run Comment |
| netz EO:Byford/Parkin |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:12:300PM |
| Author: To Be Determined |
| Physics operator summary for run 1001018: Boronization recovery and MP 248 -- High Performance Session leader: E. Marmar Physics operator: R. Granetz Summary: Shot 13 was the best (Wth=210-220 kJ), but we didn't get any trophy shots today. Startup reliability was not very good (post-boronization troubles?) Maximum RF power was 4.5 MW, but there were problems with keeping all the transmitters on for the entire flattop. We did get to vary density, triangularity, RF power, and plasma current to some extent. There may be some kind of subtle problem with the OH2's which cause Br to jump by 3 mT from shot-to-shot. Scorecard: 12 plasmas 9 fizzles 0 dud 1 test 0 aborted ---------- 22 total ------------------------------------------------------------------------------- Engineering setup for Wednesday, 18 October 2000: Overnight ECDC in D2, stopping 1-2 hours prior to the run. Run begins at 9:00 and ends at 17:00. Power system setup as on 1001013009 Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled fill B-side upper with 35 psi of D2 Hybrid DISABLED (for ECDC) fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV, NPA (aka Beast) DNB gate valve DISABLED. May do ECDC in D2 between shots. ------------------------------------------------------------------------------- Run plan for Wednesday, 18 October 2000: Boronization recovery and MP 248 -- High Performance (Possibly also MP 282A for Dmitri) Session leader: E. Marmar Physics operator: R. Granetz Goals: Go for EDA H-mode trophy shots with high RF power. Start from shot 1001013009. Vary RF power, density, triangularity and possibly current. ------------------------------------------------------------------------------- Overnight ECDC in D2. (Over the preceding weekend we boronized and ECDC'd in He) Hybrid coldstart done; no errors found Loaded shot 1001013009, except loaded segment 1 from the most recent shot (1001013016). ------------------------------------------------------------------------------- Shot 01 -- Test; OH's and EF1's under PLC control. All Ok. Next shot: go for plasma. Shot 02 -- Plasma. 1 MA, 5.4 T. Disrupted at t=1.02 s, due to an impurity injection. No D-antenna power. Breakdown might need some tweaking, but I'll let it settle for another shot before changing anything. No H-modes. Next shot: repeat with all transmitters going. Steve Wukitch needed power room access to work on the D-transmitter. Shot 03 -- Fizzle. Br0 was incredibly low, about -2.5 mT. Some kind of glitch in the OH2's ? It was at -1.0 mT on the previous shot. Next shot: increase Br0 offset by +0.5 mT Shot 04 -- Plasma. Disrupted at t=1.12 s. Prf=2.5 MW, no D-transmitter again. H-mode. The disruptions may be due to injections from an outer divertor edge tile, which glows and ejects specks at the disruption. H/D=5%. Steve Wukitch needed power room access to work on the D-transmitter. Next shot: ohmic only, to check on the glowing tile. Shot 05 -- Plasma. Early VDE disruption. Not clear why. Tile did not light up, but we didn't really get diverted. Next shot: retry ohmic only. Shot 06 -- Fizzle. Br0 is way negative again. OH2's don't seem to be reproducible. Next shot: turn the RF back on. Shot 07 -- Fizzle. Br0 is way negative again. Almost went. Next shot: raise Br0 by +1 mT. Shot 08 -- Plasma. Good shot. Prf=3.2 MW, fairly constant for 0.8 s. Nice EDA. Wth=163 kJ. H89=1.6. Divertor tile did not overheat. Next shot: raise RF power. Shot 09 -- Fizzle. Next shot: change Br0 offset by -0.5 mT, and move RXU in by about 2 cm to raise the upper triangularity. Power room access for RF testing of D into a dummy load. Shot 10 -- Fizzle. Fields look good, fill looks good. This shot almost went. Next shot: repeat, no changes. Shot 11 -- Plasma. Good shot. Prf=3.6 MW. EDA H-mode. H89=2. Upper triangularity went up to about 0.43 (it was 0.32 on the previous plasma). H/D=7-8%. Next shot: tailor RXU to make the upper delta more constant throughout the RF pulse, and raise the RF power. Shot 12 -- Plasma. Disrupted at t=1.00 s, injection. Prf=4.0 MW. Might have been a contenda if it hadn't disrupted. The divertor tile got hot, but we didn't see any pieces fly off. Next shot: repeat with no changes. Shot 13 -- Plasma. Good shot. Prf=4.4 MW. Wth=210-220 kJ. H/D=7-9% Next shot: raise target density 10% and add a 35 volt gas puff after t=0.9 s (turn off feedback gain on nl_04 after 0.9 s) Shot 14 -- Fizzle. Next shot: change IC_EF4 by -10 A Shot 15 -- Fizzle. Next shot: put IC_EF4 back to the value it had prior to shot 14. Shot 16 -- Fizzle. Next shot: add another 10 amps to IC_EF4 (to -1290 A) Shot 17 -- Fizzle. Next shot: reload segment 1 from shot 13. Shot 18 -- Plasma. Good shot, but performance was not as good as in shot 13. E-port transmitter tripped out at t=1.05 s. We got the 10% increase in target density, but no extra density during the H-mode from the gas puff. Next shot: decrease pre-fill pulse from 21 to 19 ms. Tweak ZCUR to keep the plasma at -4 mm for the entire flattop. Shot 19 -- Plasma. Good shot, but E and J tripped. H/D=7-8% ZCUR stayed at -4 to -5 mm for the entire flattop. Next shot: remove the gas puff during the flattop, but leave the target density at nl_04=1.1e20 m-2. Shot 20 -- Plasma. Good shot. Wth reached 200 kJ, but then some of the RF faulted again. Next shot: raise plasma current to 1.1 MA Shot 21 -- Plasma. Disrupted at t=1.2 s. Prf=4.5 MW. Several big impurity injections from D and J. Wth got up to 200 kJ. Performance wasn't great. Next shot: raise current from 1.0 to 1.2 starting at t=0.8 s. Shot 22 -- Plasma. Disrupted at 1.02 s, shortly after getting to 1.2 MA, due to an injection from J-antenna corner. End of run. |
| Session Leader Comments | |||
| Oct 18 2000 09:51:32:187AM | Earl Marmar | MP248 High Performance Boronized on Sunday and Monday; this is the first run since. J4 has been fixed to allow for higher total power out of the transmitter | |
| Oct 18 2000 09:52:33:653AM | 1001018002 | Earl Marmar | load from 1001013009 1 MA, nl_04=1e20 plasma ratty RF Disrupt at 1.02 s D-port did not fire |
| Oct 18 2000 10:05:13:373AM | 1001018003 | Earl Marmar | fizzle |
| Oct 18 2000 10:43:29:390AM | 1001018004 | Earl Marmar | 2.4 MW ICRF; decent EDA until disruption (H89=1.5) Disrupt at 1.13 s; divertor tile near J-port glowing after the shot |
| Oct 18 2000 11:36:49:123AM | 1001018005 | Earl Marmar | try for an ohmic only shot early disrupt (0.3 s) |
| Oct 18 2000 11:37:00:280AM | 1001018006 | Earl Marmar | fizzle |
| Oct 18 2000 11:37:07:937AM | 1001018007 | Earl Marmar | fizzle |
| Oct 18 2000 12:04:34:687PM | 1001018008 | Earl Marmar | 3 MW RF Decent EDA; H89 ~1.6 |
| Oct 18 2000 12:18:22:653PM | 1001018009 | Earl Marmar | fizzle |
| Oct 18 2000 12:47:24:560PM | 1001018010 | Earl Marmar | increase upper triangularity some fizzle |
| Oct 18 2000 01:13:34:967PM | 1001018011 | Earl Marmar | 3.5 MW RF 195 kJ stored energy got higher upper delta impurity injection at 1.22 s H/D starts at .06, rises to .09 |
| Oct 18 2000 01:41:46:360PM | 1001018012 | Earl Marmar | disrupt at 1.0 s 4 Mw for ~80 ms big ELMs on D-alpha causing RF coupling problems? |
| Oct 18 2000 02:01:46:403PM | 1001018013 | Earl Marmar | 4.5 MW H89=2 Wtot=213 kJ Beta_n=1.5 |
| Oct 18 2000 02:19:10:607PM | 1001018014 | Earl Marmar | raise target density by 10% to 1.1e20 keep puff on at 35 volts during H-Mode fizzle |
| Oct 18 2000 02:38:02:857PM | 1001018015 | Earl Marmar | fizzle |
| Oct 18 2000 03:23:03:983PM | 1001018017 | Earl Marmar | fizzle |
| Oct 18 2000 03:55:00:407PM | 1001018018 | Earl Marmar | plasma 3.4 MW for much of the time (E tripped at 1.05 s) |
| Oct 18 2000 03:55:25:827PM | 1001018019 | Earl Marmar | RF touched 5 MW briefly Many RF trips |
| Oct 18 2000 05:15:53:530PM | 1001018020 | Earl Marmar | 5 MW intermittent |
| Oct 18 2000 05:19:06:030PM | 1001018021 | Earl Marmar | 1.1 MA 4 to 4.6 MW, fairly steady mediocre confinement in steady-state (H89 ~ 1.5) |
| Oct 18 2000 05:20:05:530PM | 1001018022 | Earl Marmar | ramp up to 1.2 MA during H-Mode disrupt shortly after reaching full current |
| Physics Operator Comments | |||
| Oct 18 2000 08:22:16:953AM | Robert Granetz | Engineering setup for Wednesday, 18 October 2000: Overnight ECDC in D2, stopping 1-2 hours prior to the run. Run begins at 9:00 and ends at 17:00. Power system setup as on 1001013009 Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled fill B-side upper with 35 psi of D2 Hybrid DISABLED (for ECDC) fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV, NPA (aka Beast) DNB gate valve DISABLED. May do ECDC in D2 between shots. | |
| Oct 18 2000 08:22:35:000AM | Robert Granetz | Run plan for Wednesday, 18 October 2000: Boronization recovery and MP 248 -- High Performance (Possibly also MP 282A for Dmitri) Session leader: E. Marmar Physics operator: R. Granetz Goals: Go for EDA H-mode trophy shots with high RF power. Start from shot 1001013009. Vary RF power, density, triangularity and possibly current. | |
| Oct 18 2000 08:23:37:670AM | Robert Granetz | Overnight ECDC in D2. (Over the preceding weekend we boronized and ECDC'd in He) Hybrid coldstart done; no errors found Loaded shot 1001013009, except loaded segment 1 from the most recent shot (1001013016). | |
| Oct 18 2000 09:09:42:670AM | 1001018001 | Robert Granetz | Shot 01 -- Test; OH's and EF1's under PLC control. All Ok. Next shot: go for plasma. |
| Oct 18 2000 09:32:31:060AM | 1001018002 | Robert Granetz | Shot 02 -- Plasma. 1 MA, 5.4 T. Disrupted at t=1.02 s, due to an impurity injection. No D-antenna power. Breakdown might need some tweaking, but I'll let it settle for another shot before changing anything. No H-modes. Next shot: repeat with all transmitters going. Steve Wukitch needed power room access to work on the D-transmitter. |
| Oct 18 2000 10:46:31:843AM | 1001018004 | Robert Granetz | Shot 04 -- Plasma. Disrupted at t=1.12 s. Prf=2.5 MW, no D-transmitter again. H-mode. The disruptions may be due to injections from an outer divertor edge tile, which glows and ejects specks at the disruption. H/D=5%. Steve Wukitch needed power room access to work on the D-transmitter. Next shot: ohmic only, to check on the glowing tile. |
| Oct 18 2000 11:08:33:373AM | 1001018005 | Robert Granetz | Shot 05 -- Plasma. Early VDE disruption. Not clear why. Tile did not light up, but we didn't really get diverted. Next shot: retry ohmic only. |
| Oct 18 2000 11:29:22:543AM | 1001018006 | Robert Granetz | Shot 06 -- Fizzle. Br0 is way negative again. OH2's don't seem to be reproducible. Next shot: turn the RF back on. |
| Oct 18 2000 11:35:17:793AM | 1001018007 | Robert Granetz | Shot 07 -- Fizzle. Br0 is way negative again. Almost went. Next shot: raise Br0 by +1 mT. |
| Oct 18 2000 12:07:51:780PM | 1001018008 | Robert Granetz | Shot 08 -- Plasma. Good shot. Prf=3.2 MW, fairly constant for 0.8 s. Nice EDA. Wth=163 kJ. H89=1.6. Divertor tile did not overheat. Next shot: raise RF power. |
| Oct 18 2000 12:42:28:280PM | 1001018009 | Robert Granetz | Shot 09 -- Fizzle. Next shot: change Br0 offset by -0.5 mT, and move RXU in by about 2 cm to raise the upper triangularity. Power room access for RF testing of D into a dummy load. |
| Oct 18 2000 12:52:41:310PM | 1001018010 | Robert Granetz | Shot 10 -- Fizzle. Fields look good, fill looks good. This shot almost went. Next shot: repeat, no changes. |
| Oct 18 2000 01:21:45:293PM | 1001018011 | Robert Granetz | Shot 11 -- Plasma. Good shot. Prf=3.6 MW. EDA H-mode. H89=2. Upper triangularity went up to about 0.43 (it was 0.32 on the previous plasma). H/D=7-8%. Next shot: tailor RXU to make the upper delta more constant throughout the RF pulse, and raise the RF power. |
| Oct 18 2000 01:39:38:153PM | 1001018012 | Robert Granetz | Shot 12 -- Plasma. Disrupted at t=1.00 s, injection. Prf=4.0 MW. Might have been a contenda if it hadn't disrupted. The divertor tile got hot, but we didn't see any pieces fly off. Next shot: repeat with no changes. |
| Oct 18 2000 02:01:38:857PM | 1001018013 | Robert Granetz | Shot 13 -- Plasma. Good shot. Prf=4.4 MW. Wth=210-220 kJ. H/D=7-9% Next shot: raise target density 10% and add a 35 volt gas puff after t=0.9 s (turn off feedback gain on nl_04 after 0.9 s) |
| Oct 18 2000 02:14:43:623PM | 1001018014 | Robert Granetz | Shot 14 -- Fizzle. Next shot: change IC_EF4 by -10 A |
| Oct 18 2000 02:33:41:013PM | 1001018015 | Robert Granetz | Shot 15 -- Fizzle. Next shot: put IC_EF4 back to the value it had prior to shot 14. |
| Oct 18 2000 02:51:59:797PM | 1001018016 | Robert Granetz | Shot 16 -- Fizzle. Next shot: add another 10 amps to IC_EF4 (to -1290 A) |
| Oct 18 2000 03:27:22:343PM | 1001018018 | Robert Granetz | Shot 18 -- Plasma. Good shot, but performance was not as good as in shot 13. E-port transmitter tripped out at t=1.05 s. We got the 10% increase in target density, but no extra density during the H-mode from the gas puff. Next shot: decrease pre-fill pulse from 21 to 19 ms. Tweak ZCUR to keep the plasma at -4 mm for the entire flattop. |
| Oct 18 2000 03:58:00:590PM | 1001018019 | Robert Granetz | Shot 19 -- Plasma. Good shot, but E and J tripped. H/D=7-8% ZCUR stayed at -4 to -5 mm for the entire flattop. Next shot: remove the gas puff during the flattop, but leave the target density at nl_04=1.1e20 m-2. |
| Oct 18 2000 04:10:27:950PM | 1001018020 | Robert Granetz | Shot 20 -- Plasma. Good shot. Wth reached 200 kJ, but then some of the RF faulted again. Next shot: raise plasma current to 1.1 MA |
| Oct 18 2000 04:40:42:483PM | 1001018021 | Robert Granetz | Shot 21 -- Plasma. Disrupted at t=1.2 s. Prf=4.5 MW. Several big impurity injections from D and J. Wth got up to 200 kJ. Performance wasn't great. Next shot: raise current from 1.0 to 1.2 starting at t=0.8 s. |
| Oct 18 2000 05:12:17:733PM | 1001018022 | Robert Granetz | Shot 22 -- Plasma. Disrupted at 1.02 s, shortly after getting to 1.2 MA, due to an injection from J-antenna corner. End of run. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:57:26:153AM | Test | Ok | OH1, OH2U, OH2L, EF1U, EF1L PLC Test |
| 2 | 09:17:13:467AM | Plasma | Ok | |
| 3 | 10:02:45:140AM | Plasma | Ok | |
| 4 | 10:19:46:390AM | Plasma | Ok | |
| 5 | 10:49:55:030AM | Plasma | Ok | |
| 6 | 11:10:49:763AM | Plasma | Ok | |
| 7 | 11:29:40:623AM | Plasma | Ok | |
| 8 | 11:49:58:263AM | Plasma | Ok | |
| 9 | 12:15:26:890PM | Plasma | Ok | |
| 10 | 12:44:09:577PM | Plasma | Ok | |
| 11 | 12:57:18:263PM | Plasma | Ok | |
| 12 | 01:21:53:390PM | Plasma | Ok | |
| 13 | 01:46:57:233PM | Plasma | Ok | |
| 14 | 02:08:57:013PM | Plasma | Ok | |
| 15 | 02:26:34:293PM | Plasma | Ok | |
| 16 | 02:46:17:890PM | Plasma | Ok | |
| 17 | 02:59:29:903PM | Plasma | Ok | |
| 18 | 03:12:55:247PM | Plasma | Ok | |
| 19 | 03:39:02:590PM | Plasma | Ok | |
| 20 | 04:02:49:590PM | Plasma | Ok | |
| 21 | 04:26:25:437PM | Plasma | Ok | |
| 22 | 04:50:07:513PM | Plasma | Ok | |