| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Earl Marmar,Earl Marmar |
| Physics operator(s): | Earl Marmar,Robert Granetz |
| Engineering operator(s): | Bill Cochran,Gary Dekow |
| Engineering Operator Run Comment |
| Run Plan for Friday, 991022 MP 214 and MP 252 Marmar/Granetz/Cochran/D |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:21:507PM |
| Author: To Be Determined |
| Session Leader Run Summary -- 991022 The purpose of the run was MP252, Optimization of Hydrogen Fraction for Minority Heating Piggyback -- MP214 D&E commissioning Session leader: E. Marmar Physics operator: E. Marmar/R. Granetz The run was preceded by overnight ECDC in deuterium. The run was quite successful, with H/D ratio scanned from 0.025 (natural at the beginning of the run) all the way up to >.23 on shot 25. General observations: The best heating and confinement, and lowest radiated powers, were obtained with no extra hydrogen puffing. The plasmas clearly degraded as the hydrogen fraction was brought above 0.05. Based on H-factor confinement enhancement, the optimum H level is at or below 0.025, the lowest we have seen during this run campaign. The sawtooth reheat rate (not adjusted for density differences) was also maximized for hydrogen fraction between 0.025 and 0.06. The shots with 0.04 decreased confinement. Once the fraction reached 0.08, even quasi-steady H-modes were impossible; the radiated power increased continuously, and the plasmas returned to L-mode. For fractions greater than 0.08, only the very briefest of H-Modes were obtained, with basically steady-state L-mode the result. Shots for further analysis: shot H/D Mode H-ITER89 (assuming 80% RF absorption) 03 .023 EDA 1.43 04 .032 EDA 1.30 (only 1.3 MW RF on this one) 05 .024 EDA 1.39 06 .031 EDA 1.36 07 .036 EDA 1.32 09 .056 EDA 1.32 --> 1.16 11 .070 EDA 1.06 & dropping 13 .083 Elmfree 0.86 14 .062 EDA 1.16 15 .050 EDA 1.33 16 .049 EDA 1.22 17 .046 EDA 1.23 18 .044 EDA 1.30 19 .042 EDA 1.33 20 .043 EDA 1.32 21 .040 EDA 1.30 23 .083 L 0.74 24 .143 L 0.58 25 .230 L 0.57 There were reports of significant Mo radiation on all shots. We may be overdue for a boronization. Based on this run, puffing low levels of hydrogen had no benefit, and once the level exceeded about 0.05, things rapidly got worse with increasing H levels. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:09:770PM |
| Author: To Be Determined |
| Physics operator summary for run 991022: MP 214 -- ICRF commissioning (D & E) MP 252 -- H-fraction optimization SL: E. Marmar PO: E. Marmar/R. Granetz EO: B. Cochran/G. Dekow Summary: H/D ratio was scanned from 2.5% (at beginning of day) to 30% at the end of the day. It was pretty conclusive that H-mode quality decreased monotonically as H/D increased. Impurity generation during H-mode also increased as H/D increased. See session leader's summary for further details. There were no unusual problems with machine operation today. Scorecard: 22 plasmas 2 fizzles 0 duds (0 due to lack of one or more power supplies) 1 test 0 aborted ---------- 25 total ------------------------------------------------------------------------------- Engineering Setup for Friday, 991022: Run will BEGIN at 08:00 and END at 16:00 Setup power supplies from shot 991020014 (0.8 MA, 5.4 T, flattop to 1.5 s, extended Bt flattop at 50 kA), EXCEPT MOVE FIZZLE DETECTOR OFF TIME TO 1.7 s OVERNIGHT ECDC in D2 prior to the run, stopping 1-2 hours before the run. 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 10 psi of H2 Hybrid DISABLED 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 ------------------------------------------------------------------------------- Run Plan for Friday, 991022: MP 214 -- ICRF commissioning (D & E) MP 252 -- H-fraction optimization Session leader: E. Marmar Physics operator: E. Marmar/R. Granetz Load shot 991020014 Make sure the engineer changes fizzle detector "off" time to t=1.7 s. Increase Btor to 5.4 tesla (from 5.2 tesla) in BOTH segments 1 and 2 !!! (I_tf --> 150 kA). Disable B-side-upper valve initially. As the run progresses, we will try to increase the H/D ratio gradually on a shot-to-shot basis, and then, if time permits, decrease it gradually. Program RF power as per agreed upon plan, in order to provide a break-in-slope analysis of the RF absorption fraction. After each suitable shot, Granetz will run EFIT on a faster timescale (to a private tree), and Melby will use the resulting WPLASM signal to calculate the RF absorption fraction. ------------------------------------------------------------------------------- Note: There was overnight ECDC in D2, stopping 1 hour prior to this run. Hybrid coldstart done; no errors found ($set default cmod$models:[hybrid.tcl] $@hybinit_dispatch $@show_bitbus_log Use editor search to verify no occurrences of "error" nor "not respond") Load 991020014. Increase Btor to 5.4 T in both segments 1 and 2, and move fizzle detector "off" time to t=1.7 s. Earl is presently the Physics Operator Shot 01 -- Test. No power data cycle test. Shot 02 -- Fizzle. Fill looks high; B_R a tad also. Shot 03 -- Plasma. Reduce prepuff to 22 msec B_R offset to -.00175 from -.00075 plasma fairly steady EDA, a few RF trips H/D ~ .023 Granetz takes over as physics operator. Fast EFIT done at t=1.250 +/- 0.050 s. Next shot: no PCS changes. Shot 04 -- Plasma. D-port: 1.2 MW, E-port: faulted early, but we still had an EDA H-mode. Fast EFIT done at t=1.000 +/- 0.050 s. Eric finds absorption = 87%, with H/D=3%. Next shot: no PCS changes. Shot 05 -- Plasma. EDA H-mode. Total Prf = 2.6 MW. Fast EFIT done at t=1.000 +/- 0.050 s. H/D=2.5% Next shot: no PCS changes. Shot 06 -- Plasma. EDA H-mode. Good RF. Fast EFIT done for t=1.000 +/- 0.050 s. Next shot: add Btor blip from t=0.8-1.0 for ECE, and turn on H2 puff, with 100 volts from t=0.3 to 0.4 s, and 40 volts from t=0.4 to 1.4 s. Plenum pressure = 10 psi. Also move first RF cutout to t=1.1 s to avoid Btor blip. Shot 07 -- Plasma. Good EDA. Good RF. Btor blip worked. May be observing a correlation between neutron rate and H/D. Fast EFIT done around t=1.100 s. Next shot: increase H2 maintenance level to 50 volts (from 40 V). Shot 08 -- Plasma. Outer gap increased by 2 mm for no apparent reason. H-mode is not very good. H/D=5%. Next shot: extend Btor blip by 10 ms, in order to allow ECE channels to overlap. Increase RCUR by 1 mm, in order to reduce outer gap by 2 mm. Short delay to check out an apparent high temperature reading on part of the vessel. Willy Burke unplugged the relevant heater, but it had no power going to it anyway, so he doesn't think the high temp reading was real. Shot 09 -- Plasma. Lots of radiated power. H/D=5-6%. Fast EFIT done around t=1.100 s. Next shot: increase H2 some more, by raising maintenance level to 60 volts. Shot 10 -- Plasma. E-port faulted early. H/D=7-7.5%. Fast EFIT done around t=1.260 s. Next shot: change H2 valve programming. It will now turn on fully from t=0.25 to 0.50 s, and then turn off completely. Shot 11 -- Plasma. EDA and type-III ELMy H-modes. H/D=7%. Ugly looking shot. Things seem to be getting worse as we puff more H2. Next shot: increase H2 pulse to 350 ms (from 250 ms). Shot 12 -- Plasma. Only had 1 MW of RF (D-port didn't fire). H/D=7-8%. Next shot: try again for more RF; no PCS changes. Shot 13 -- Plasma. Ugly H-modes. H/D=8%. Next shot: disable H2 valve. Shot 14 -- Plasma. H/D=6% (down a bit). EDA H-modes look somewhat better. Next shot: no PCS changes. Let the H2 come down some more. Shot 15 -- Plasma. H/D=5-6% (down a bit more). EDA H-mode during first 200 ms was pretty good. Short delay to check out a UPS breaker. Next shot: repeat with no changes. Still no H2 being puffed. Shot 16 -- Plasma. H/D=5% Initial H-mode lasted until t=1.0 s, but changed from EDA to ELMy part way through (at the same time as the start of the Btor blip). Next shot: move Btor blip earlier by 100 ms. Shot 17 -- Plasma. H/D=5%. Again, the change from EDA to ELMy was at the (changed) time of the Btor blip. Next shot: remove Btor blip altogether, and decrease Btor from 5.46 to 5.3 T (I_tf from 152 kA to 147.55 kA) Shot 18 -- Plasma. Neutrons still turn over, even without a Btor blip. Fast EFIT done around t=1.260 s. Next shot: add Btor blip back in, starting at t=0.7 s (as for shot 17), and raise nl_04 from 1.0 to 1.1e20 m-2. Shot 19 -- Plasma. Target density didn't go up. Btor blip was okay. H/D=5%. Next shot: try raising nl_04 to 1.25e20 m-2. Shot 20 -- Plasma. Got nl_04=1.13e20 m-2. H/D=4.5-5%. Fast EFIT done around t=0.870 s. Next shot: increase outer gap by 2 mm (decrease RCUR by 1 mm). Shot 21 -- Plasma. Long EDA H-mode. Outer gap did indeed increase by 2 mm. H/D is down to 4%. Next shot: increase outer gap by another 2 mm (decrease RCUR by another 1 mm). Shot 22 -- Fizzle. Bz jumped up by 3 mT and Br0 jumped up by 1 mT on this shot. Next shot: Bz and Br0 tweaks. Also, increase H2 pressure to 20 psi and enable the H2 valve. Puff duration = 350 ms. Decrease outer gap by 2 mm (in anticipation of H2 effect observed earlier today). Shot 23 -- Plasma. One very short H-mode. One transmitter faulted early. Outer gap=10-11 mm. Breakdown fields are back to normal. Target density increased slightly to 1.25e20 m-2. H/D=8-15%. Fast EFIT done around t=1.100 s. Next shot: Keep H2 valve on at a maintenance level of 60 volts after the main pulse. Decrease nl_04 from 1.25 to 1.15e20 m-2. Shot 24 -- Plasma. One very short H-mode; similar to previous shot. RF stayed on; Prf=2.1 MW. nl_04=1.2e20 m-2. H/D=15-16%. Faster EFIT done around t=1.100 s. Next shot: remove Btor blip, increase H2 puff, reduce target density. Shot 25 -- Plasma. No H-modes. H/D=23-33% End of run. |
| Session Leader Comments | |||
| Oct 22 1999 07:54:24:827AM | Earl Marmar | Run Plan for Friday, 991022: MP 214 -- ICRF commissioning (D & E) MP 252 -- H-fraction optimization Session leader: E. Marmar Physics operator: E. Marmar/R. Granetz Engineering operator: Bill Cochrane Load shot 990924005 Modify TF to add post-plasma 50 kA flat top, as on 991021 Make sure the engineer changes fizzle detector "off" time to t=1.7 s. Disable B-side-upper valve initially. As the run progresses, we will try to increase the H/D ratio gradually on a shot-to-shot basis, and then, if time permits, decrease it gradually. Program RF power as per agreed upon plan, in order to provide a break-in-slope analysis of the RF absorption fraction. After each suitable shot, Granetz will run EFIT on a faster timescale (to a private tree), and Melby will use the resulting WPLASM signal to calculate the RF absorption fraction. | |
| Oct 22 1999 07:54:42:670AM | 991022001 | Earl Marmar | No power data cycle test |
| Oct 22 1999 09:03:51:907AM | 991022004 | Earl Marmar | plasma Several RF trips; E-port never came back H/D = 0.03 |
| Oct 22 1999 10:00:57:543AM | 991022005 | Earl Marmar | plasma steadier, with a few trips H/D = 0.026 |
| Oct 22 1999 10:01:24:217AM | 991022006 | Earl Marmar | plasma one RF Trip H/D = .032 |
| Oct 22 1999 10:14:16:967AM | 991022007 | Earl Marmar | plasma TF sweep added for ECE puffed H, starting at 0.3 seconds Nice steady EDA; neutron rate drooping slightly through RF pulse H/D 0.043 at start of RF, drooping to ~.032 |
| Oct 22 1999 10:59:18:623AM | 991022008 | Earl Marmar | plasma add more H H/D ~ .048 RF tripped (D-port) |
| Oct 22 1999 11:00:08:717AM | 991022009 | Earl Marmar | plasma H/D ~ .055 RF ok 2 MW radiated power |
| Oct 22 1999 11:21:13:717AM | 991022010 | Earl Marmar | plasma some RF trips E port never comes back H/D ~ .075 |
| Oct 22 1999 11:37:02:153AM | 991022011 | Earl Marmar | plasma puffing H from 0.25 to 0.5, then off H/D ~ .07 in and out of H-mode lots of radiated power |
| Oct 22 1999 12:13:10:967PM | 991022012 | Earl Marmar | plasma mostly L-Mode; 2 short H-modes no power from D port H/D ~ .08 at 0.8 seconds |
| Oct 22 1999 12:14:53:687PM | 991022013 | Earl Marmar | plasma RF stayed on to first modulation repetitive H-modes --> ramping P_rad --> back to L H/D ~ 0.082 |
| Oct 22 1999 12:34:12:357PM | 991022014 | Earl Marmar | plasma H puff turned off RF on through first modulation Better EDA early H/D = 0.06 |
| Oct 22 1999 02:16:31:373PM | 991022015 | Earl Marmar | plasma Better first H-Mode H/D = 0.050 during early H-Mode |
| Oct 22 1999 02:17:00:903PM | 991022016 | Earl Marmar | plasma H/D ~ 0.05 RF ok |
| Oct 22 1999 02:17:24:187PM | 991022017 | Earl Marmar | plasma H/D ~ 0.05 RF ok |
| Oct 22 1999 02:17:49:340PM | 991022018 | Earl Marmar | plasma H/D ~ 0.045 RF good |
| Oct 22 1999 02:21:55:700PM | 991022019 | Earl Marmar | plasma raise nl_04 prog to 1.1e20 (got 1.0) H/D ~ 0.045 RF Good |
| Physics Operator Comments | |||
| Oct 22 1999 08:16:02:030AM | 991022002 | Earl Marmar | Fizzle Fill looks high; B_R a tad also |
| Oct 22 1999 08:44:48:873AM | 991022003 | Earl Marmar | Reduce prepuff to 22 msec B_R offset to -.00175 from -.00075 plasma fairly steady EDA, a few RF trips H/D ~ .023 |
| Oct 22 1999 09:10:12:420AM | 991022003 | Robert Granetz | Granetz takes over as physics operator. Fast EFIT done at t=1.250 +/- 0.050 s. Next shot: no PCS changes. |
| Oct 22 1999 09:09:39:717AM | 991022004 | Robert Granetz | Shot 04 -- Plasma. D-port: 1.2 MW, E-port: faulted early, but we still had an EDA H-mode. Fast EFIT done at t=1.000 +/- 0.050 s. Next shot: no PCS changes. |
| Oct 22 1999 09:25:30:670AM | 991022004 | Robert Granetz | Eric finds absorption = 87%, with H/D=3%. |
| Oct 22 1999 09:29:05:123AM | 991022005 | Robert Granetz | Shot 05 -- Plasma. EDA H-mode. Total Prf = 2.6 MW. Fast EFIT done at t=1.000 +/- 0.050 s. H/D=2.5% Next shot: no PCS changes. |
| Oct 22 1999 09:55:43:297AM | 991022006 | Robert Granetz | Shot 06 -- Plasma. EDA H-mode. Good RF. Next shot: add Btor blip from t=0.8-1.0 for ECE, and turn on H2 puff, with 100 volts from t=0.3 to 0.4 s, and 40 volts from t=0.4 to 1.4 s. Plenum pressure = 10 psi. Also move first RF cutout to t=1.1 s to avoid Btor blip. |
| Oct 22 1999 10:19:42:013AM | 991022006 | Robert Granetz | Fast EFIT done for t=1.000 +/- 0.050 s. |
| Oct 22 1999 10:10:02:437AM | 991022007 | Robert Granetz | Shot 07 -- Plasma. Good EDA. Good RF. Btor blip worked. May be observing a correlation between neutron rate and H/D. Fast EFIT done around t=1.100 s. Next shot: increase H2 maintenance level to 50 volts (from 40 V). |
| Oct 22 1999 10:30:28:717AM | 991022008 | Robert Granetz | Shot 08 -- Plasma. Outer gap increased by 2 mm for no apparent reason. H-mode is not very good. H/D=5%. Next shot: extend Btor blip by 10 ms, in order to allow ECE channels to overlap. Increase RCUR by 1 mm, in order to reduce outer gap by 2 mm. |
| Oct 22 1999 10:37:47:733AM | 991022008 | Robert Granetz | Short delay to check out an apparent high temperature reading on part of the vessel. Willy Burke unplugged the relevant heater, but it had no power going to it anyway, so he doesn't think the high temp reading was real. |
| Oct 22 1999 10:52:58:717AM | 991022009 | Robert Granetz | Shot 09 -- Plasma. Lots of radiated power. H/D=5-6%. Fast EFIT done around t=1.100 s. Next shot: increase H2 some more, by raising maintenance level to 60 volts. |
| Oct 22 1999 11:14:02:153AM | 991022010 | Robert Granetz | Shot 10 -- Plasma. E-port faulted early. H/D=7-7.5%. Fast EFIT done around t=1.260 s. Next shot: change H2 valve programming. It will now turn on fully from t=0.25 to 0.50 s, and then turn off completely. |
| Oct 22 1999 11:51:26:640AM | 991022012 | Robert Granetz | Shot 12 -- Plasma. Only had 1 MW of RF (D-port didn't fire). H/D=7-8%. Next shot: try again for more RF; no PCS changes. |
| Oct 22 1999 12:14:52:077PM | 991022013 | Robert Granetz | Shot 13 -- Plasma. Ugly H-modes. H/D=8%. Next shot: disable H2 valve. |
| Oct 22 1999 12:34:58:187PM | 991022014 | Robert Granetz | Shot 14 -- Plasma. H/D=6% (down a bit). EDA H-modes look somewhat better. Next shot: no PCS changes. Let the H2 come down some more. |
| Oct 22 1999 01:06:07:733PM | 991022015 | Robert Granetz | Shot 15 -- Plasma. H/D=5-6% (down a bit more). EDA H-mode during first 200 ms was pretty good. Short delay to check out a UPS breaker. Next shot: repeat with no changes. Still no H2 being puffed. |
| Oct 22 1999 01:23:03:060PM | 991022016 | Robert Granetz | Shot 16 -- Plasma. H/D=5% Initial H-mode lasted until t=1.0 s, but changed from EDA to ELMy part way through (at the same time as the start of the Btor blip). Next shot: move Btor blip earlier by 100 ms. |
| Oct 22 1999 01:37:45:170PM | 991022017 | Robert Granetz | Shot 17 -- Plasma. H/D=5%. Again, the change from EDA to ELMy was at the (changed) time of the Btor blip. Next shot: remove Btor blip altogether, and decrease Btor from 5.46 to 5.3 T (I_tf from 152 kA to 147.55 kA) |
| Oct 22 1999 02:05:25:560PM | 991022018 | Robert Granetz | Shot 18 -- Plasma. Neutrons still turn over, even without a Btor blip. Fast EFIT done around t=1.260 s. Next shot: add Btor blip back in, starting at t=0.7 s (as for shot 17), and raise nl_04 from 1.0 to 1.1e20 m-2. |
| Oct 22 1999 02:16:33:763PM | 991022019 | Robert Granetz | Shot 19 -- Plasma. Target density didn't go up. Btor blip was okay. H/D=5%. Next shot: try raising nl_04 to 1.25e20 m-2. |
| Oct 22 1999 02:34:43:903PM | 991022020 | Robert Granetz | Shot 20 -- Plasma. Got nl_04=1.13e20 m-2. H/D=4.5-5%. Next shot: increase outer gap by 2 mm (decrease RCUR by 1 mm). |
| Oct 22 1999 03:32:49:793PM | 991022020 | Robert Granetz | Fast EFIT done around t=0.870 s. |
| Oct 22 1999 02:52:51:860PM | 991022021 | Robert Granetz | Shot 21 -- Plasma. Long EDA H-mode. Outer gap did indeed increase by 2 mm. H/D is down to 4%. Next shot: increase outer gap by another 2 mm (decrease RCUR by another 1 mm). |
| Oct 22 1999 03:14:21:390PM | 991022022 | Robert Granetz | Shot 22 -- Fizzle. Bz jumped up by 3 mT and Br0 jumped up by 1 mT on this shot. Next shot: Bz and Br0 tweaks. Also, increase H2 pressure to 20 psi and enable the H2 valve. Puff duration = 350 ms. Decrease outer gap by 2 mm (in anticipation of H2 effect observed earlier today). |
| Oct 22 1999 03:32:06:700PM | 991022023 | Robert Granetz | Shot 23 -- Plasma. One very short H-mode. One transmitter faulted early. Outer gap=10-11 mm. Breakdown fields are back to normal. Target density increased slightly to 1.25e20 m-2. H/D=8-15%. Next shot: Keep H2 valve on at a maintenance level of 60 volts after the main pulse. Decrease nl_04 from 1.25 to 1.15e20 m-2. |
| Oct 22 1999 03:53:42:140PM | 991022023 | Robert Granetz | Fast EFIT done around t=1.100 s. |
| Oct 22 1999 03:55:02:217PM | 991022024 | Robert Granetz | Shot 24 -- Plasma. One very short H-mode; similar to previous shot. RF stayed on; Prf=2.1 MW. nl_04=1.2e20 m-2. H/D=15-16%. Next shot: remove Btor blip, increase H2 puff, reduce target density. |
| Oct 22 1999 04:05:41:827PM | 991022024 | Robert Granetz | Faster EFIT done around t=1.100 s. |
| Oct 22 1999 04:07:04:840PM | 991022025 | Robert Granetz | Shot 25 -- Plasma. No H-modes. H/D=23-33% End of run. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 07:54:47:200AM | Test | Ok | Data system test shot, All Power Systems off |
| 2 | 08:06:21:780AM | Plasma | Ok | Fizzle |
| 3 | 08:26:09:810AM | Plasma | Ok | (null) |
| 4 | 08:52:33:717AM | Plasma | Ok | (null) |
| 5 | 09:12:26:890AM | Plasma | Ok | (null) |
| 6 | 09:34:08:750AM | Plasma | Ok | (null) |
| 7 | 09:54:53:983AM | Plasma | Ok | (null) |
| 8 | 10:14:39:840AM | Plasma | Ok | (null) |
| 9 | 10:39:02:857AM | Plasma | Ok | (null) |
| 10 | 11:00:49:403AM | Plasma | Ok | (null) |
| 11 | 11:21:06:857AM | Plasma | Ok | (null) |
| 12 | 11:42:11:390AM | Plasma | Ok | (null) |
| 13 | 12:04:41:030PM | Plasma | Ok | (null) |
| 14 | 12:24:40:797PM | Plasma | Ok | (null) |
| 15 | 12:45:03:047PM | Plasma | Ok | (null) |
| 16 | 01:09:31:983PM | Plasma | Ok | (null) |
| 17 | 01:26:29:357PM | Plasma | Ok | (null) |
| 18 | 01:45:52:043PM | Plasma | Ok | (null) |
| 19 | 02:06:06:733PM | Plasma | Ok | (null) |
| 20 | 02:22:53:840PM | Plasma | Ok | (null) |
| 21 | 02:40:28:373PM | Plasma | Ok | (null) |
| 22 | 02:59:46:763PM | Plasma | Ok | (null) |
| 23 | 03:17:06:263PM | Plasma | Ok | (null) |
| 24 | 03:39:09:013PM | Plasma | Ok | (null) |
| 25 | 03:57:10:467PM | Plasma | Ok | (null) |