| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Yijun Lin |
| Physics operator(s): | Earl Marmar,Joseph Snipes,Earl Marmar |
| Engineering operator(s): | Sam Pierson,Bill Byford |
| Engineering Operator Run Comment |
| MP 417 EO: Pierson PO: Marmar SL: YIN |
| Session Leader Plans |
| Entered: Apr 22 2005 08:19:19:060AM |
| Author: Yijun Lin |
| SL_plan for 1040422 (MP 417, day 3 post-boronization)
1) Repeat fiducial shot at the start of the day. (1050421030) 2) Repeat fiducial shot at 3 MW level (fine tune the strike point) 3) 1 MA, a lot higher target density at 1.4e20. Puffing as hard as possible (like in 960227034) 4) Puff N2 and see whether the performance is better. 5) L-mode high power shots (limited or USN) to understand how much of the radiation is due to H-mode (confinement) and how much due to increased influxes (RF heating). This run plan is subject to changes depending on what we find along the way. |
| Physics Operators Plans |
| Entered: Apr 21 2005 05:04:43:777PM |
| Author: Earl Marmar |
| MP#417 post-boronization evaluation of all-metal ...
SL: Y. Lin PO: E. Marmar ECDC overnight D2, P=2e-4 guage, bake at 60C Run begins at 09:00 ends at 17:00 EDT Power systems as on 1050421029 A-coil in standard configuration and enabled (+Dtop -Dbot -Jtop +Jbot) Transmitters 1,2,3,4 in RUN-ON by 08:30 Gas setup: fill B-top with 6 psi D2 hybrid enabled (PG4) fill B-side lower 1 psi argon, hybrid enabled (PG1) leave B-side upper with He3 Hybrid disabled (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) ***we need nitrogen for this run; take neon off and add nitrogen***** fill Ninja to 8 PSI nitrogen Enable the following: ECE and VUV gate valves, Z-bolo shutter |
| Session Leader Summaries |
| Entered: Apr 22 2005 05:15:47:650PM |
| Author: Yijun Lin |
| SL_summary:
The idea was to cool the divertor and any other places that produce impurities during H-mode, without degrading the H-mode pedestal. The H-modes were short and ELM-like for the fiducial plasma shape and density (shot 3, 21). Attempt to get a fiducial in the end failed (shot 27 was a fizzle). Puff D2, we have steadier H-mode. Slightly higher Wmhd. Less Mo. Slightly lower Prad. (shot 4, 5, 6) Puff N2, we have steadier H-mode and significantly lower Prad_main (similar 2pi foil). Higher Wmhd. Lower Mo. (compare 13 and 14) Too much N2 --> Prad came down, but Wmhd also came down (shot 19) (Pedestal degraded?). Too much N2 can also cause disruption (shot 16, 18). Puff both D2 and N2 in H-mode gave the best stored energy (shot 8, 10, 11, 12, 13) But, not in shot 26 (too much N2 in already?) Puff He from main chamber didn't seemt to help (shot 22, 23). The performance did not get worse earlier in the day (compare shot 3 and 21). We have definitely learned something to get better performance, and lower Prad_main. Because the boronization enhancement has already faded, we were not able to have good performance however we tried. It will be interesting to see what happens if we run similar tricks after fresh boronization. |
| Physics Operator Summaries |
| Session Leader Comments | |||
| Apr 22 2005 10:08:35:640AM | 1050422001 | Yijun Lin | shot 1: fiducial shot. repeat 1050421030.
Request: 1. MA, 5.4 T, nl = 1.e20 m^-2. Result: Plasma. W = 130 kJ at 3 MW. L-H threshold ~ 1.8 MW. it is very similar to the last shot yesterday 1050421030. Same Prad, same Wmhd, some L-H threshold |
| Apr 22 2005 10:12:03:357AM | 1050422002 | Yijun Lin | shot 2: fiducial shot.
Request: 1. MA, 5.4 T, nl = 1.e20 m^-2. 3 MW Prf Result: Plasma. disrupted 0.44 sec |
| Apr 22 2005 10:28:43:497AM | 1050422003 | Yijun Lin | shot 3
Request: 1. MA, 5.4 T, nl = 1.e20 m^-2. 3 MW Prf result: 7 H-modes. Wmax 130 kJ. Strike point is fine. next: Puff D2 in H-mode. |
| Apr 22 2005 10:43:01:623AM | 1050422004 | Yijun Lin |
shot 4 Request: 1. MA, 5.4 T, nl = 1.e20 m^-2. 3 MW Prf, Puff D2 in H-mode. result: Long EDAish H-mode. Wmax at 143 kJ, 3 MW RF. D port dropped out after 1.1 sec and Wmhd dropped out. Next: more D2 puff and see if there any more enhancement. |
| Apr 22 2005 10:58:17:123AM | 1050422005 | Yijun Lin | shot 5
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf, Puff D2 (more) in H-mode. result: Long EDAish H-mode. Wmax at 146 kJ, 3 MW RF. Next: start puff N2 from NINJA. reduce D2 puff in H-mode back to level in shot 4. |
| Apr 22 2005 11:11:26:153AM | 1050422006 | Yijun Lin | shot 6
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf Puff D2 in H-mode (40 Volt), and N2 (0.6 sec) result: Many H-L back transitions. D2 puff too small. Wmax at 137 kJ, 3 MW RF. next: Raise D2 puff to the level in shot 4 (60 Volt) at 0.7 sec. Same N2 at 0.6 sec |
| Apr 22 2005 11:25:38:307AM | 1050422007 | Yijun Lin | shot 7
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf Puff D2 in H-mode (60 Volt), and N2 (starting at 0.6 sec) result: Wmax at 137 kJ, 3 MW RF. Still had back transitions. Blip thought the N2 may be puffed to the places we did not want. Zeff was getting higher. Next: change NINJA capillaries and also start puff earlier |
| Apr 22 2005 11:47:06:590AM | 1050422008 | Yijun Lin | shot 8
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf Puff D2 in H-mode (60 Volt), and N2 (starting at 0.6 sec) result: Wmax at 140 kJ, 3 MW RF. Still had back transitions earlier. Interestingly, the H-mode got better vs. time. Prad is getting smaller in time (improvement over shot 7) Next: more N2. |
| Apr 22 2005 12:07:16:737PM | 1050422009 | Yijun Lin | shot 9. disrupted at 0.43 sec.
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| Apr 22 2005 12:35:02:337PM | 1050422010 | Yijun Lin | shot 10.
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf Puff D2 in H-mode (60 Volt), and N2 Result: Wmax at 135 kJ, 3 MW RF. Back transitions earlier. (No improvement over shot 8). Next more N2. |
| Apr 22 2005 12:52:38:470PM | 1050422011 | Yijun Lin | shot 11.
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf Puff D2 in H-mode (60 Volt) from 0.7 sec. and N2 (8 PSI, from 0.5 sec, last 0.4 sec. need 0.15 sec to get in) Result: Wmax at 148 kJ, 3 MW RF. (Some improvement. The RF has some faults). Lower Prad than shot 10 next: More N2 (starting 0.5 sec, last 0.4 sec. 8 psi) |
| Apr 22 2005 01:08:53:120PM | 1050422012 | Yijun Lin | shot 12.
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf Puff D2 in H-mode (60 Volt) from 0.7 sec. and N2 (8 PSI, from 0.5 sec, last 0.4 sec. need 0.15 sec to get in) Result: Wmax at 145 kJ, 3 MW RF. similar to shot 11. next: starting N2 0.4 sec, last 0.4 sec. 8 psi |
| Apr 22 2005 01:20:48:757PM | 1050422013 | Yijun Lin | shot 13
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf Puff D2 in H-mode (60 Volt) from 0.7 sec. and N2 (8 PSI, from .4 sec, last 0.4 sec. need 0.15 sec to get in) Result: Wmax at 150 kJ, 3 MW RF. marginally better than shot 12. (Seen in Te. and Neutron rate in the 2nd and third H-modes. next: No N2 puff and see whether the plasma gets worse |
| Apr 22 2005 01:36:59:953PM | 1050422014 | Yijun Lin | shot 14
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf Puff D2 in H-mode (60 Volt) from 0.7 sec. No N2 puff. Result: Wmax at 137 kJ, 3 MW RF. More Prad earlier on. Less Wmax. Note Wmhd drooped while previous shots with N2 puff Wmhd increased in H-mode. Next: raise N2 pressure to 13 psi (previously, it was 10 psi) puff from 0.4 sec, last for 0.4 sec. |
| Apr 22 2005 02:31:48:870PM | 1050422015 | Yijun Lin | shot 15
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf Puff D2 in H-mode (60 Volt) from 0.7 sec. and N2 (13 PSI, from .4 sec, last 0.4 sec. need 0.15 sec to get in) Result: 16 Torr-liter N2 in. (shot 13 got 9 torr-liter in) Prad way down. But Wmhd also down to 130 kJ. Dalpha signal indicates the H-mode was marginal. (Is it that the confinement quality down?) next: same N2. No D2 puff. See what happens |
| Apr 22 2005 02:32:57:573PM | 1050422016 | Yijun Lin | shot 16
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf No D2 puff in H-mode N2 (13 PSI, from .4 sec, last 0.4 sec. need 0.15 sec to get in) Result: Disrupted 0.68 sec (N2 may have been the culprit of this disruption. Next reduce N2 to 11 psi) |
| Apr 22 2005 02:30:44:590PM | 1050422017 | Yijun Lin | dud. |
| Apr 22 2005 02:44:41:867PM | 1050422018 | Yijun Lin | shot 18.
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf No D2 puff in H-mode N2 (11 PSI, from .4 sec, last 0.4 sec. need 0.15 sec to get in) Result: Disrupted 0.68 sec (N2 may have been the culprit of this disruption.) Next: puff N2 later, start at 0.55 sec. |
| Apr 22 2005 03:07:42:200PM | 1050422019 | Yijun Lin | shot 19.
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf No D2 puff in H-mode N2 (11 PSI, from .55 sec, last 0.4 sec. need 0.15 sec to get in) Result: 16 Torr-liter N2 in. Wmhd at 132 kJ, but not drooping. Long H-mode. Core Prad is way down in comparison to shot without N2. Zeff is 2. (probably too much N2 in). Next: no N2, no D2. see how bad the performance is now. |
| Apr 22 2005 03:17:05:557PM | 1050422020 | Yijun Lin | shot 20:
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf No D2 puff in H-mode No N2 result: short H-modes. No power from D port. Wmax at 117 kJ. Prad is about the same as shot 19 at 3 MW level. (Still had about half of N level in the previous shot). next repeat. |
| Apr 22 2005 03:27:02:740PM | 1050422021 | Yijun Lin | shot 21:
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf No D2 puff in H-mode No N2 Result: Similar to shot 3. 130 kJ, Prad 2 MW. Short ELM free H-modes. At least we know that the machine condition is roughly the same as earlier today. Next: Helium puff, and see whether we can get better plasma. |
| Apr 22 2005 04:04:24:850PM | 1050422022 | Yijun Lin | shot 22:
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf Helium puff from B-side lower during H-mode. Result: very similar to shot 21. Not much helium in? |
| Apr 22 2005 04:15:10:970PM | 1050422023 | Yijun Lin | shot 23:
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf Helium puff from B-side lower during H-mode. Result: A short H-mode. All antennas triped and the plasma stayed in L-mode Wmax ~ 130 kJ Next: Puff D2 in H-mode (75 V, between shot 4 and 5). Reduced He puff |
| Apr 22 2005 04:16:16:657PM | 1050422024 | Yijun Lin | shot 24:
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf he puff from B-side lower during H-mode. Puff D2 in H-mode (75 V) Result: H-modes. Wmax 140 kJ. Prad in the 2nd H-mode is way low. the first one is similar to shot with only D2 puff. Next: No He puff. N2 + D2 puff. |
| Apr 22 2005 04:31:26:107PM | 1050422025 | Yijun Lin | shot 25:
Request: 1. MA, 5.4 T, nl = 1.1e20 m^-2. 3 MW Prf Puff D2 in H-mode (80 V) Puff N2 (0.65 sec, lasts for 0.4 sec, 11 PSI) Result: H-modes. Wmax 140 kJ. Prad is about the same as shot 24. N2 started to come in at 0.8 sec (too late) Too much D2? next: N2 starts at 0.55 sec. D2 at 60 V. |
| Apr 22 2005 05:14:01:683PM | 1050422027 | Yijun Lin | fizzle |
| Physics Operator Comments | |||
| Apr 22 2005 10:16:03:873AM | 1050422001 | Earl Marmar | load from 1050421030 (yesterday's fiducial)
delay at start of run, camac highway driver problem plasma very similar to 1050421030 EF3 crowbar after the shot; many magnetics offset errors as a result |
| Apr 22 2005 10:15:36:077AM | 1050422002 | Earl Marmar | tweak RXL to try to get the strike point off the outer nose
plasma early disruption (0.44 seconds) |
| Apr 22 2005 10:32:27:497AM | 1050422003 | Earl Marmar | additional small change to RXL before 0.5 seconds
plasma Outer strike looks better |
| Apr 22 2005 10:38:14:327AM | 1050422004 | Earl Marmar | nl_04 target to 1.2e20
nl_04 prop gain to 0 at .7 s add 60 volt PG3 puff starting at .7 s plasma much steadier H-mode (EDAish) |
| Apr 22 2005 10:45:15:060AM | 1050422005 | Earl Marmar | go to 90 volt PG3 puff starting at .7 s
|
| Apr 22 2005 11:09:01:730AM | 1050422006 | Earl Marmar | reduce prefill puff by 1 msec to 18 msec
go to 40 volt PG3 puff starting at .7 s Ninja puffing N2 starting at 0.6 s plasma some back-transitions early; probably want a little more D2 during the RF |
| Apr 22 2005 11:26:32:087AM | 1050422007 | Earl Marmar | go to 60 volt PG3 puff starting at .7 s
Ninja puffing N2 starting at 0.6 s plasma |
| Apr 22 2005 11:39:07:280AM | 1050422008 | Earl Marmar | no pcs changes
Ninja puffing N2 from different capillaries plasma; very similar to shot 7 |
| Apr 22 2005 11:40:26:950AM | 1050422009 | Earl Marmar | cell access before shot 9
no pcs changes Increase N2 puff from Ninja |
| Apr 22 2005 12:21:29:827PM | 1050422009 | Joseph Snipes | I took over as physics operator for shot 1050422009 and it disrupted at 0.416 s. The plasma touches both the inner wall and outboard limiter at OH1 crossover. Try increasing CLEARIN early to 0.01 m then bring it back to 0.001 m by 0.56 s for shot 10. |
| Apr 22 2005 12:27:03:853PM | 1050422010 | Joseph Snipes | Shot 10: Increasing CLEARIN early to 0.01 m then back to 0.001 m by 0.56 s. Reduced the rate of rise of the density. Good shot. |
| Apr 22 2005 12:45:19:143PM | 1050422011 | Joseph Snipes | Shot 11: Repeat. Good shot. |
| Apr 22 2005 01:00:25:437PM | 1050422012 | Joseph Snipes | Shot 12: Increased RCUR and CLEARIN during the rampdown to attempt to avoid the disruption in rampdown. Good shot. Rampdown did not improve much. Disrupted at 1.76 s. |
| Apr 22 2005 01:13:09:980PM | 1050422013 | Joseph Snipes | Shot 13: Decreased ZXL and increased ZXU in the rampdown to attempt to avoid the disruption in rampdown. Good shot. Rampdown is a bit worse. Disrupted earlier at 1.72 s. |
| Apr 22 2005 01:25:42:020PM | 1050422014 | Joseph Snipes | Shot 14: Reloaded shot 12. Good shot. Rampdown improved with no N2! |
| Apr 22 2005 02:06:48:253PM | 1050422015 | Earl Marmar | no pcs changes
Ninja N2 back on Increase Ninja N2 plenum pressure from 9.9 to 13 psi plasma |
| Apr 22 2005 02:30:08:027PM | 1050422016 | Earl Marmar | no pcs changes
Early disruption (~.7 s); sawteeth got very small before that, around the time the nitrogen hits the plasma. |
| Apr 22 2005 02:31:32:573PM | 1050422017 | Earl Marmar | turn off D2 puff during H-mode
reduce Ninja N2 plenum pressure to 11 psi (from 13) Ninja still enabled dud; no pulsed gas - plc problem |
| Apr 22 2005 02:52:33:800PM | 1050422018 | Earl Marmar | no pcs changes
reduce Ninja N2 plenum pressure to 11 psi (from 13). plasma Early disruption (~.7 s); appears to still be too much nitrogen. |
| Apr 22 2005 03:03:24:607PM | 1050422019 | Earl Marmar | no pcs changes
delay Ninja trun-on by 150 ms (now opening at 550 ms). plasma semi-steady h-mode; not as good as nitrogen plus deuterium |
| Apr 22 2005 03:26:42:723PM | 1050422020 | Earl Marmar | no pcs changes
disable Ninja nitrogen puff still no D2 puff during H-mode plasma only 2 MW ICRF |
| Apr 22 2005 03:28:12:520PM | 1050422021 | Earl Marmar | no pcs changes
plasma repetitive ELM-free H-modes |
| Apr 22 2005 03:45:46:717PM | 1050422022 | Earl Marmar | puff helium-4 during the H-mode
B-side lower filled to 20 psi He-4 PG1 puff at .72 s, 60 volt preprogram nl_04 feedback prop gain to 0 after .72 seconds plasma looks much like 21 got the valve programming; no obvious gas |
| Apr 22 2005 04:04:56:600PM | 1050422023 | Earl Marmar | puff helium-4 during the H-mode
B-side lower filled to 20 psi He-4 PG1 puff at .70 s for about .4 sec, 100 volt preprogram plasma one ELM-free H-mode; lasted a bit longer than the first H-mode with no puffing during RF |
| Apr 22 2005 04:11:45:520PM | 1050422024 | Earl Marmar | puff helium-4 during the H-mode
B-side lower filled to 20 psi He-4 PG1 puff at .72 s for about .1 sec, 100 volt preprogram PG3 (D2) puff, 75 volt during RF plasma 2 H-modes, perhaps a little more EDA-ish |
| Apr 22 2005 04:43:43:320PM | 1050422025 | Earl Marmar | turn off He puff
PG3 (D2) puff, 80 volt during RF Ninja puffing N2, starting at .65s plasma missing data, camac highway 3 is malfunctioning (neutrons, H/D, ...) |
| Apr 22 2005 05:05:28:000PM | 1050422026 | Earl Marmar | PG3 (D2) puff, 60 volt during RF
Ninja puffing N2, starting at .55s plasma |
| Apr 22 2005 05:12:28:353PM | 1050422027 | Earl Marmar | fiducial-like
gate valves closed no D2 puff during expected H-mode time fizzle |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:53:49:217AM | Plasma | Ok | |
| 2 | 10:07:04:263AM | Plasma | Ok | |
| 3 | 10:19:25:170AM | Plasma | Ok | |
| 4 | 10:33:06:357AM | Plasma | Ok | |
| 5 | 10:45:39:450AM | Plasma | Ok | |
| 6 | 10:58:39:683AM | Plasma | Ok | |
| 7 | 11:11:33:700AM | Plasma | Ok | |
| 8 | 11:26:12:023AM | Plasma | Ok | |
| 9 | 12:03:10:460PM | Plasma | Ok | |
| 10 | 12:25:08:027PM | Plasma | Ok | |
| 11 | 12:39:13:147PM | Plasma | Ok | |
| 12 | 12:57:33:467PM | Plasma | Ok | |
| 13 | 01:10:39:837PM | Plasma | Ok | |
| 14 | 01:23:23:270PM | Plasma | Ok | |
| 15 | 01:36:43:203PM | Plasma | Ok | |
| 16 | 02:02:27:007PM | Plasma | Ok | |
| 17 | 02:26:40:277PM | Plasma | Bad | No HV enable for the pulsed Gas |
| 18 | 02:40:28:290PM | Plasma | Ok | |
| 19 | 02:53:01:160PM | Plasma | Ok | |
| 20 | 03:06:01:217PM | Plasma | Ok | |
| 21 | 03:20:13:960PM | Plasma | Ok | |
| 22 | 03:36:13:063PM | Plasma | Ok | |
| 23 | 03:49:06:150PM | Plasma | Ok | |
| 24 | 04:03:32:380PM | Plasma | Ok | |
| 25 | 04:18:15:127PM | Plasma | Ok | |
| 26 | 04:50:02:427PM | Plasma | Ok | |
| 27 | 05:08:23:937PM | Plasma | Ok | |