| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Vincent Tang |
| Physics operator(s): | Ron Parker |
| Engineering operator(s): | Unknown |
| Engineering Operator Run Comment |
| MP#389 Compact Neutral Particle Analyzer (CNPA) Testing SL:Tang PO:Parke |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:04:867PM |
| Author: Vincent Tang |
| Run Summary: The machine performed well today and we took a lot of data. We were able to run a RF(shots 13, 14, 15, 16) and field scan(shots 17, 18,19,20) for nl_04~.4e20. It appears that the detector received the most signal at 5.4T, and, as expected, is sensitive to changes in RF. However, we could not prevent H modes when the power exceeded ~1.3MW; the rise in density coupled with the rapid increase in photon background deteriorated the signal. Limiter runs could potentially solved this issue. Finally, for the last few shots(#27-30) we were able to do parts of a density scan at 1-1.5 MW from nl_04~0.4e20 to 0.8e20; the neutral energy and count rate lowered as expected when the density increased. It was a challenge to anticipate the proper aperture size, requiring some shots to be repeated. Finally, the particle/photon filter test was convincing but not absolutely conclusive due to possible scattering of neutrals around the CNPA filter wheel. More detailed analysis of the data is required to study the minority tails. All in all, this run day provided us with significant information for improving the diagnostic, and potentially some very interesting plasma behavior. ____________________________________________________________________________ __________________________________ Engineering Setup and Run Plan 1040415 ECDC overnight in D2 @ 2e-4 Torr stopping at 07:00 Run begins at 09:00 and ends at 17:00 Purpose: MP#389 Compact Neutral Particle Analyzer (CNPA) Testing Session leader: Tang Physop: Parker Engineering Setup: Power Supplies as on 1040414013 A-Coil power supplies off. Gas System Setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill C-side with 30 psi D2 Hybrid enabled (PG3) Diagnostic gate valve permissives for ECE, VUV, DNB assuming no vacuum problems Disable NINJA RF: Transmitters #1-4 in RUN-ON by 08:30 Objectives: The main objective of this proposal is to verify the operational status of the CNPA,characterize its operational range, and study ICRF tails. The first few shots will confirm that the previously recorded CNPA signals are indeed caused by particles,not photons, by inserting a 10 micron Be filter.Afterwards, a power scan based on shot 1040414013 starting at 0.5 MW will be performed. We will stop raising the power when H-Modes are triggered. The CNPA aperture will be adjusted with cell access as needed. With success, we will carry out a density scan and attempt to fill in the power vs. density operational range. Finally, time or interest permitting, we will do a limited field scan and/or change the phase of the antenna to study the effecton the minrity heated tails. Run Plan: 1. Reproduce shot 1040414013 and confirm increase of signal (counts and energy)during DNB. 2. Repeat with 10 micron Be filter. 3. Power scan starting at 0.5 MW until H-modes are reached. 4. Repeat 3) at the folowing densities: nl_04=6e19 m-2, 8e19 m-2, 1e20 e-2 5. Based on success on the above scans, shoose a suitable density and power, and carry out a field scan with selected values between 4.7 T to 6.0 T. If time,vary antenna phasing. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:49:880PM |
| Author: Ron Parker |
| ;; This buffer is for notes you don't want to save, and for Lisp evaluation. ;; If you want to create a file, visit that file with C-x C-f, ;; then enter the text in that file's own buffer. Run Summary 1040415 The run was devoted to checking out the performance of the Compact Neutral Particle Analyzer (CNPA).Most of the shots were at low density, typically nl_04 ~ 0.4e20 m-3. The RF power was kept reasonably low, e.g., 1 MW to avoid H-modes. The machine performed very well for this run and good data were obtained. The main result from the CNPA was that a energetic neutral tail was apparently observed, but energetically softens rapidly as density is increased. Raising power leads to H-modes and high density, but that produces low energy particles/photons that tend to saturate the detector.But even with this background, very few high energy counts were obtained, leading to a possible conclusion that energetic tails do not form above nl_04 =8e20 m-2 and 1 MW of power.But this needs to be checked more carefully by running limiter discharges. The discharges were very reproducible and the machine ran exceptionally well. Of 30 shots, 2 were test shots after power glitches, one shot disrupted and the rest ran exactly as programmed. There were no duds and no fizzles, thanks to excellent skill of the physics operator (and the support team!) Engineering Setup and Run Plan 1040415 ECDC overnight in D2 @ 2e-4 Torr stopping at 07:00 Run begins at 09:00 and ends at 17:00 Purpose: MP#389 Compact Neutral Particle Analyzer (CNPA) Testing Session leader: Tang Physop: Parker Engineering Setup: Power Supplies as on 1040414013 A-Coil power supplies off. Gas System Setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill C-side with 30 psi D2 Hybrid enabled (PG3) Diagnostic gate valve permissives for ECE, VUV, DNB assuming no vacuum problems Disable NINJA RF: Transmitters #1-4 in RUN-ON by 08:30 Objectives: The main objective of this proposal is to verify the operational status of the CNPA,characterize its operational range, and study ICRF tails. The first few shots will confirm that the previously recorded CNPA signals are indeed caused by particles,not photons, by inserting a 10 micron Be filter.Afterwards, a power scan based on shot 1040414013 starting at 0.5 MW will be performed. We will stop raising the power when H-Modes are triggered. The CNPA aperture will be adjusted with cell access as needed. With success, we will carry out a density scan and attempt to fill in the power vs. density operational range. Finally, time or interest permitting, we will do a limited field scan and/or change the phase of the antenna to study the effecton the minrity heated tails. Run Plan: 1. Reproduce shot 1040414013 and confirm increase of signal (counts and energy)during DNB. 2. Repeat with 10 micron Be filter. 3. Power scan starting at 0.5 MW until H-modes are reached. 4. Repeat 3) at the folowing densities: nl_04=6e19 m-2, 8e19 m-2, 1e20 e-2 5. Based on success on the above scans, shoose a suitable density and power, and carry out a field scan with selected values between 4.7 T to 6.0 T. If time,vary antenna phasing. |
| Session Leader Comments | |||
| Apr 15 2004 09:09:57:713AM | 1040415001 | Vincent Tang | TF test |
| Apr 15 2004 10:15:29:147AM | 1040415004 | Vincent Tang | Good shot, strong signal during RF with more counts during DNB period |
| Apr 15 2004 10:40:27:190AM | 1040415005 | Vincent Tang | Good shot. Even with the 10um Be filter, we got more counts during the DNB period. However, the rate is ~6 times less than w/o the filter. |
| Apr 15 2004 01:00:41:473PM | 1040415006 | Vincent Tang | 10um filter removed, and aperature opened to 3.20/45. Counts above 30keV the 50ms before, during, and after the DNB pulse are 564, 2466, and 528 |
| Apr 15 2004 01:01:28:643PM | 1040415007 | Vincent Tang | 10um filter reinstalled. Counts above 30keV the 50ms before, during, and after the DNB pulse are 60,292,113 |
| Apr 15 2004 01:03:50:033PM | 1040415008 | Vincent Tang | Filter wheel turned to 1/16"SS304 to test scattering theory. Shot disrupted but the beam fired...CNPA picked it up but only a bit-- would support theory that the neturals are scattering around the filter wheel |
| Apr 15 2004 01:06:01:127PM | 1040415009 | Vincent Tang | Lots of HXrays...HXR signal is enchanced during the beam. |
| Apr 15 2004 01:18:07:443PM | 1040415009 | Vincent Tang | Lots of HXrays...HXR signal is enchanced during the beam. A puzzle. |
| Apr 15 2004 01:18:45:880PM | 1040415010 | Vincent Tang | DNB didn't fire. no signal except for RF background |
| Apr 15 2004 01:19:51:490PM | 1040415011 | Vincent Tang | Again lots of HXR, although this time there as no significant enchantment during the beam period, as in shot 9. |
| Apr 15 2004 01:30:06:607PM | 1040415013 | Vincent Tang | Start RF scan. No filter. Counts above 30keV 50ms before, during, and after DNB is 2057,3486,1981. Spectrum is harder than at 1MW |
| Apr 15 2004 01:30:43:153PM | 1040415014 | Vincent Tang | Start RF scan. No filter. Counts above 30keV 50ms before, during, and after DNB is 536,1724,703 |
| Apr 15 2004 01:31:46:137PM | 1040415015 | Vincent Tang | 2MW; aperature opened too wide; overloaded Amp. |
| Apr 15 2004 02:12:15:810PM | 1040415016 | Vincent Tang | Reduced aperature for possible H-mode. Counts are 106.187,121 |
| Apr 15 2004 01:56:05:883PM | 1040415017 | Vincent Tang | Field change to 4.8T in order to test field sensitivity |
| Apr 15 2004 02:44:54:627PM | 1040415019 | Vincent Tang | Unable to reproduce shot 6 in terms of CNPA signal. |
| Apr 15 2004 03:42:26:863PM | 1040415024 | Vincent Tang | we are repeating shots 22 and 23 in reverse order since the field was at 6T not 5.4T. So shots 24 will have the aperature closed, while shots 25 will try to reproduce shot 6. |
| Apr 15 2004 04:09:21:110PM | 1040415025 | Vincent Tang | we have reproduced shot 6. Now we will start on the density scan |
| Apr 15 2004 04:22:58:880PM | 1040415026 | Vincent Tang | CNPA spectrum is softer relative to shot 25. Good data. |
| Apr 15 2004 04:49:46:047PM | 1040415028 | Vincent Tang | Plasma went into H-mode and overloaded amp system. Next shot will be a repeat with the aperature reduced by half. |
| Apr 15 2004 05:17:24:743PM | 1040415030 | Vincent Tang | No significant CNPA signal |
| Physics Operator Comments | |||
| Apr 15 2004 08:49:18:903AM | 1040415001 | Ron Parker | First shot will be a 50 kA test shot. |
| Apr 15 2004 09:15:15:663AM | 1040415001 | Ron Parker | Test shot was fine, next shot will be a plasma shot, hopefully replicating 1040414013. |
| Apr 15 2004 09:32:19:697AM | 1040415002 | Ron Parker | Shot 2 had a glitch in the timing. The shot ran fine, but the beam did not fire at the set time. Other than that, a good shot. |
| Apr 15 2004 09:47:54:123AM | 1040415002 | Ron Parker | There was a commutation fault on shot 2 and a TF fuse blew. Replacing the fuse took 20 minutes and will require a 50 kA test shot on shot 3. |
| Apr 15 2004 09:55:53:630AM | 1040415003 | Ron Parker | shot 3, a 50 kA test shot looked OK. Next shot should be a plasma shot. |
| Apr 15 2004 10:40:06:753AM | 1040415004 | Ron Parker | Shot 4 ran well, data collected. |
| Apr 15 2004 10:40:21:893AM | 1040415005 | Ron Parker | Shot 5 ran well, filter in place. |
| Apr 15 2004 10:51:05:353AM | 1040415006 | Ron Parker | Shot 6 ran well. Aperture wider, more counts. Next shot, insert filter. |
| Apr 15 2004 11:12:40:493AM | 1040415007 | Ron Parker | Shot 7 ran well, filter in place. Nest shot: same plasma, thicker filter. |
| Apr 15 2004 11:16:12:430AM | 1040415008 | Ron Parker | Shot 8 disrupted. Repeat on next shot. |
| Apr 15 2004 11:27:49:030AM | 1040415008 | Ron Parker | Oops, power glitch. short delay. |
| Apr 15 2004 11:44:35:703AM | 1040415009 | Ron Parker | Shot 9 ran OK, but strong hard X-rays. |
| Apr 15 2004 12:11:29:200PM | 1040415010 | Ron Parker | Shot 10 was OK, no beam. |
| Apr 15 2004 12:10:31:903PM | 1040415011 | Ron Parker | Shot 11 went off OK, fairly strong hard X-rays. |
| Apr 15 2004 12:26:40:093PM | 1040415011 | Ron Parker | Shot 11 OK, but hards too strong. Shot 12: inject gas at 175 ms to reduce hards. |
| Apr 15 2004 12:47:52:843PM | 1040415013 | Ron Parker | Shot 12 was OK. Hards were less. Next shot: Double gas and RF to 1.5 MW |
| Apr 15 2004 01:04:27:720PM | 1040415014 | Ron Parker | J. Snipes taking over for R. Parker as physop. Increased Pulse gas 3 in segment 1 to 100 V at 0.05 s and 75 V at 0.11 s. Shot 14 was O.K. |
| Apr 15 2004 01:44:19:313PM | 1040415015 | Ron Parker | Increased PG3 to 100 V also at 0.11 s for shot 15. |
| Apr 15 2004 02:21:32:583PM | 1040415016 | Ron Parker | Reduced TF current to 133 kA for shot 17. |
| Apr 15 2004 02:23:02:003PM | 1040415017 | Ron Parker | Increased field to 5.26 T for shot 18 |
| Apr 15 2004 02:25:54:923PM | 1040415018 | Ron Parker | Shot 18 ran OK. Next shot: back to 150 kA TF current. |
| Apr 15 2004 02:44:19:630PM | 1040415019 | Ron Parker | Snot 19 was fine. for shot 20, raise field to 5.8 |
| Apr 15 2004 02:56:23:103PM | 1040415020 | Ron Parker | Shot 20 went off well. Next: 6.0 T |
| Apr 15 2004 03:05:28:517PM | 1040415021 | Ron Parker | Shot 21 OK. Next: Back to reproduce shot 6 |
| Apr 15 2004 03:41:06:210PM | 1040415022 | Ron Parker | Shot 22 ran well, but CNPA signal did not reproduce. Why? Oops, Shot 6 did not load! Next: Same shot with aperture closed. |
| Apr 15 2004 03:42:13:067PM | 1040415023 | Ron Parker | Shot 23 ran, but field was 5.9 T since shot 6 did not load in last shot. Next: repeat, this time at 5.4 T |
| Apr 15 2004 03:57:19:620PM | 1040415024 | Ron Parker | Shot 24 went of well and reproduced shot 6, except more hard X-rays (no early gas pulse). Next: reload shot 22, but set field at 5.4 T |
| Apr 15 2004 04:11:29:013PM | 1040415025 | Ron Parker | Shot 25 reproduced shot 6 and also reproduced CNPA signal. Next: raise density to nl_04=0.4e20 |
| Apr 15 2004 04:23:15:613PM | 1040415026 | Ron Parker | Shot ran nicely with density at ~ 0.4 (nl_04). Next: raise nl_04 to 0.5 m-2 |
| Apr 15 2004 04:35:13:043PM | 1040415027 | Ron Parker | Shot 27 ran well with increased density, fewer high energy CNPA counts. Next shot: raise RF power to 1.5 MW |
| Apr 15 2004 05:13:16:607PM | 1040415028 | Ron Parker | Shot was OK, but ran into H-mode and cutoff CNPA. Next: reduced aperture in CNPA, same shot. |
| Apr 15 2004 05:14:23:527PM | 1040415029 | Ron Parker | Shot 29 was OK, but H-mode again and saturated detector. |
| Apr 15 2004 05:15:05:293PM | 1040415030 | Ron Parker | Shot 30 ran well, but H-mode even at 1.35 MW. Very few fast particles. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:04:11:923AM | Test | Ok | 50KA Test Shot |
| 2 | 09:17:05:570AM | Test | Ok | |
| 3 | 09:50:07:310AM | Test | Ok | 50KA TF Shot |
| 4 | 10:02:27:470AM | Plasma | Ok | |
| 5 | 10:19:47:283AM | Plasma | Ok | |
| 6 | 10:40:35:207AM | Plasma | Ok | |
| 7 | 10:57:40:350AM | Plasma | Ok | |
| 8 | 11:13:53:447AM | Plasma | Ok | |
| 9 | 11:38:51:363AM | Plasma | Ok | |
| 10 | 11:53:48:197AM | Plasma | Ok | |
| 11 | 12:06:07:953PM | Plasma | Ok | |
| 12 | 12:26:00:827PM | Plasma | Ok | |
| 13 | 12:46:58:437PM | Plasma | Ok | |
| 14 | 12:59:43:693PM | Plasma | Ok | |
| 15 | 01:17:33:930PM | Plasma | Ok | |
| 16 | 01:35:16:773PM | Plasma | Ok | |
| 17 | 01:57:21:743PM | Plasma | Ok | |
| 18 | 02:11:16:543PM | Plasma | Ok | |
| 19 | 02:31:09:763PM | Plasma | Ok | |
| 20 | 02:44:38:550PM | Plasma | Ok | |
| 21 | 02:57:09:710PM | Plasma | Ok | |
| 22 | 03:17:15:103PM | Plasma | Ok | |
| 23 | 03:30:22:500PM | Plasma | Ok | |
| 24 | 03:44:28:270PM | Plasma | Ok | |
| 25 | 04:00:46:020PM | Plasma | Ok | |
| 26 | 04:13:18:920PM | Plasma | Ok | |
| 27 | 04:26:17:033PM | Plasma | Ok | |
| 28 | 04:39:01:070PM | Plasma | Ok | |
| 29 | 04:52:17:340PM | Plasma | Ok | |
| 30 | 05:04:48:503PM | Plasma | Ok | |