| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Francesca Bombarda |
| Physics operator(s): | Unknown |
| Engineering operator(s): | Unknown |
| Engineering Operator Run Comment |
| First Transport Scan attempt |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:08:100PM |
| Author: To Be Determined |
From: LEADER::BOMBARDA Date: 29-JUL-1993 18:34:30 Description: summary of run 930729 The purpose of the run was to measure Ti and Te profiles, as specified in the MP008, with the HIREX spectrometers. Of course, argon was injected. We started by picking one good discharge from the day before, 930728025 , which had a long current flat top at about 420 kA and a relatively flat density as well. It took 6 fizzles before we could obtain a plasma, with small adjustments on the OH1 and OH2 voltages, EF2 gains, and fill pressure up and down (the first plasma had 1.e-5). Shots #7 through #9 were all good, but we played around with the fill pressure and the A port gas valve puffs to get a flat density as early as possible. That also helped to get rid of the peak seen in the soft x-ray signal at 0.2 sec. We also tried to to anticipate the argon puff, but the next four shots were duds, in spite of our lowering the fill pressure and not putting argon at all. In fact, we did get plasma again when turned the fill pressure up to 1.2e-5, then lowered it again to 1.0e-5 for the next shot, which was very good, and virtually equal to #10. Shots #16, 18 and 19 were all very similar (#17 was a fizzle), and we used them for scanning the spectrometers across the plasma section. Next, we tried to go up in density, and although we did get other 5 shots with plasma, from #21 to #26, they were not very nice and the density didn't get any higher. #29 was another dud, and after that we decided to scan the low density side, by removing the A port valve completely. Shots 31 and 32 were good, with Ip around 460 kA, tons of x-rays and argon signals; #33 was a fizzle, and again we increased the fill pressure up to 1.4e-5 for the last shot. Conclusions: we had a very good run and feel very happy about our data, which of course, now need to be analysed. ECE and PHA were also working fine, so that we should be able to make interesting comparisons. Remarks: we didn't need to inject an awful lot of argon to get a decent signal, and we can do with less at low density, so you need not to be afraid to have argon when you run your program! Score of the day: 34 shots, 19 plasmas, 11 fizzles, 4 duds. Not bad! |
| Physics Operator Summaries |
| Session Leader Comments | |||
| Jul 29 1993 09:05:42:630AM | Francesca Bombarda | Engineering set up
Supply Start Close Open Crow bar Invert R (mOhm) EF1 L -1.1 -0.94 0.0 0.07 0.5 80.4 EF1 U -1.1 -0.94 0.0 0.07 0.5 80.7 X OH1 -1.1 -0.85 0.0 0.10 0.5 44.9 X OH2_L -1.1 -0.65 0.0 0.12 0.5 8.4 X OH2_U -1.1 -0.65 0.0 0.12 0.5 8.5 EF2 L -0.4 0.5 46.0 EF2 U -0.4 0.5 45.5 EF3 -0.05 0.5 EF4 -1.1 0.5 EFC -0.02 0.5 150. TF -1.65 0.55 X Bus diags Integrator Start: -2. Integrator End: 6. Dig Time: -1.7 Dig Freq: 1500.00 Scope 0: -2.25 Scope 1: -3.2 Program of the day: Ti, Te profiles | |
| Jul 29 1993 09:27:47:590AM | 930729001 | Francesca Bombarda | Engineering set up
Supply Start Close Open Crow bar Invert R (mOhm) EF1 L -1.1 -0.94 0.0 0.07 0.5 80.4 EF1 U -1.1 -0.94 0.0 0.07 0.5 80.7 X OH1 -1.1 -0.85 0.0 0.10 0.5 44.9 X OH2_L -1.1 -0.65 0.0 0.12 0.5 8.4 X OH2_U -1.1 -0.65 0.0 0.12 0.5 8.5 EF2 L -0.4 0.5 46.0 EF2 U -0.4 0.5 45.5 Fizzle. Field pressure=1.2e-5 For shot #2 F.p=1.0e-5 from 50 to 250 msec OH1 from -100 to 50 V OH2 from -10 to 0 V |
| Jul 29 1993 09:49:20:390AM | 930729002 | Francesca Bombarda | Fizzle. Commutation failure in the EF1 power supply.
|
| Jul 29 1993 10:03:02:100AM | 930729003 | Francesca Bombarda | Fizzle.
For #4 , fill pressure up to 1.4e-5. |
| Jul 29 1993 10:37:23:610AM | 930729005 | Francesca Bombarda | EF2_U raised to 1750. A before commutation. Still a fizzle.
For #6 , turned on feedback control on Bradial from 0 to 50msec. |
| Jul 29 1993 10:49:37:860AM | 930729006 | Francesca Bombarda | Fizzle.
For #7, fill pressure down to 1.0 e-5 |
| Jul 29 1993 11:07:36:950AM | 930729007 | Francesca Bombarda | OK. Good argon spectra.
For #8, gas down to 8.5e-6 |
| Jul 29 1993 11:19:28:670AM | 930729008 | Francesca Bombarda | Ok . Even better spectra.
No changes. |
| Jul 29 1993 11:36:01:850AM | 930729009 | Francesca Bombarda | OK.
For #10, moved A port gas pulses forward in time by 30 msec. |
| Jul 29 1993 11:49:55:680AM | 930729010 | Francesca Bombarda | Ok.
For #11, moved argon puff from +20 to -50 msec. Increased chopper biased current, starting at 140 msec by increasing pre-programmed V. |
| Jul 29 1993 12:02:36:250PM | 930729011 | Francesca Bombarda | Dud.
For #12, argon puff moved forward at 0. sec Fill pressure 1.0e-5 |
| Jul 29 1993 12:14:44:250PM | 930729012 | Francesca Bombarda | Dud.
Fill down to 6.5-6 for next shot and argon off. |
| Jul 29 1993 12:31:19:430PM | 930729013 | Francesca Bombarda | Dud.
Fill up to 1.2e-5 for next shot and argon off. |
| Jul 29 1993 12:44:03:080PM | 930729014 | Francesca Bombarda | 200 msec or so of plasma (300 kA). EF1_U trip
For #15, fill pressure set to 1.0e-5 |
| Jul 29 1993 12:53:02:940PM | 930729015 | Francesca Bombarda | OK. No changes.
|
| Jul 29 1993 01:09:32:380PM | 930729016 | Francesca Bombarda | Fizzle. Fill pressure up to 1.2e-5 for next shot. Moved the A port
second gas puff closer to first |
| Jul 29 1993 01:31:15:410PM | 930729017 | Francesca Bombarda | Ok.
|
| Jul 29 1993 01:42:55:410PM | 930729018 | Francesca Bombarda | OK. NO changes
|
| Jul 29 1993 02:00:15:680PM | 930729019 | Francesca Bombarda | OK. Increase length of last gas puff
|
| Jul 29 1993 02:11:25:090PM | 930729020 | Francesca Bombarda | Ok.
For #21, try to raise the density by an extra pulse at 40 ms. |
| Jul 29 1993 02:24:44:880PM | 930729021 | Francesca Bombarda | Ok, but not very nice.
Made all pulses from A port shorter for next pulse. |
| Jul 29 1993 02:36:59:240PM | 930729022 | Francesca Bombarda | Ok, nice shot, but density back to previous level. For #23, changed the gas waveform.
EFC control turned off at 350 msec. |
| Jul 29 1993 02:43:11:080PM | 930729023 | Francesca Bombarda | Ok, nice shot, but density back to previous level. For #23, changed the gas waveform.
EFC control turned off at 350 msec. |
| Jul 29 1993 02:51:58:040PM | 930729023 | Francesca Bombarda | OK, but not a happy shot.
Small adjustements on the alternator (up to 13500 V) For next shot , gas valve waveform changed. |
| Jul 29 1993 03:07:46:290PM | 930729024 | Francesca Bombarda | Fizzle. But no change.
|
| Jul 29 1993 03:16:47:420PM | 930729025 | Francesca Bombarda | OK, but ne still low. More changes for next shot.
EFC back on. |
| Jul 29 1993 03:37:31:680PM | 930729026 | Francesca Bombarda | Too much gas, Ip only makes it to 300 kA . No changes for next shot, but just wait
until methane level goes down (Marmar's theory) |
| Jul 29 1993 03:47:18:900PM | 930729027 | Francesca Bombarda | Fizzle. No changes
|
| Jul 29 1993 04:02:18:320PM | 930729028 | Francesca Bombarda | OK, with some esitations. Density doesn't go any higher.
Argon puff returned to previous value. |
| Jul 29 1993 04:13:24:800PM | 930729029 | Francesca Bombarda | Dud.
For #30, no gas from A port, raised fill pressure up to 1.3 e-5 |
| Jul 29 1993 04:25:13:800PM | 930729030 | Francesca Bombarda | Fizzle. No changes
|
| Jul 29 1993 04:38:26:810PM | 930729031 | Francesca Bombarda | Ok. Low density.
A valve was turned off by PLC, but the waveform is still there. Be aware! No changes. |
| Jul 29 1993 04:57:28:120PM | 930729032 | Francesca Bombarda | OK. No changes.
|
| Jul 29 1993 05:02:08:430PM | 930729033 | Francesca Bombarda | Fizzle. Increase fill p. to 1.4e-5
|
| Jul 29 1993 05:45:16:210PM | 930729034 | Francesca Bombarda | OK.
|
| Physics Operator Comments |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:53:48:580AM | Plasma | Ok | Fizzle; EF3 bus voltage 2500 |
| 2 | 09:26:04:410AM | Plasma | Bad | EF1 power supply commutation failure |
| 3 | 09:50:27:830AM | Plasma | Ok | Fizzle |
| 4 | 10:09:20:090AM | Plasma | Ok | Fizzle |
| 5 | 10:25:06:170AM | Plasma | Ok | Fizzle |
| 6 | 10:38:41:360AM | Plasma | Ok | Fizzle |
| 7 | 10:51:15:310AM | Plasma | Ok | Plasma! |
| 8 | 11:04:53:460AM | Plasma | Ok | Plasma |
| 9 | 11:20:58:990AM | Plasma | Ok | Plasma. Working to increase density earlier. |
| 10 | 11:36:09:310AM | Plasma | Ok | Plasma. Sparks on TV |
| 11 | 11:51:15:410AM | Plasma | Ok | no faults -- no plasma |
| 12 | 12:04:22:770PM | Plasma | Ok | no faults -- no plasma |
| 13 | 12:16:47:220PM | Plasma | Ok | |
| 14 | 12:29:50:350PM | Plasma | Bad | EF1U Power Supply Commutation Failure |
| 15 | 12:44:16:780PM | Plasma | Ok | All OK. Nice Plasma. Nothing changed since last shot |
| 16 | 12:58:43:140PM | Plasma | Ok | Fizzle |
| 17 | 01:11:36:800PM | Plasma | Ok | Plasma Back |
| 18 | 01:35:06:830PM | Plasma | Ok | Good shot |
| 19 | 01:45:52:480PM | Plasma | Ok | Good Plasma. EFCL warming up |
| 20 | 01:56:53:270PM | Plasma | Ok | Good Shot |
| 21 | 02:13:45:220PM | Plasma | Ok | Good Shot |
| 22 | 02:25:22:400PM | Plasma | Ok | Good Shot |
| 23 | 02:39:22:120PM | Plasma | Ok | Very disruptive Plasma. |
| 24 | 02:51:10:540PM | Plasma | Ok | Fizzle |
| 25 | 03:05:23:170PM | Plasma | Ok | Plasma, 470 kA, not runaway |
| 26 | 03:19:17:100PM | Plasma | Ok | Plasma with sparks showing on ALC-TV channel 34 |
| 27 | 03:38:03:270PM | Plasma | Ok | Fizzle |
| 28 | 03:49:06:630PM | Plasma | Ok | Plasma with interesting density bump |
| 29 | 04:02:54:780PM | Plasma | Ok | Dud. Flux plots look OK to me. |
| 30 | 04:15:39:170PM | Plasma | Ok | Fizzle |
| 31 | 04:27:20:780PM | Plasma | Ok | Plasma. Discharge length over 530 msec. Low density, lots of x-rays. |
| 32 | 04:39:50:980PM | Plasma | Ok | Plasma |
| 33 | 04:52:06:280PM | Plasma | Ok | Fizzle |
| 34 | 05:04:19:460PM | Plasma | Ok | Plasma |
| 35 | 05:15:36:260PM | Test | Ok | Test of other OH1 6-pulse forward bridge |