| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Robert Granetz |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Gary Dekow,Bill Parkin,Ed Fitzgerald |
| Engineering Operator Run Comment |
| Purpose; MP332 - New Approach To The Study Of Turbulent Edge Plasma/Grul |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:32:833PM |
| Author: Robert Granetz |
| ------------------------------------------------------------------------------- Engineering setup for Tuesday, 03 June 2003 Purpose: MP 332 - New approach to study of turbulent edge plasma fluctuations MP 330 - Edge minority heating for H-mode control and boronization recovery Session leader: Grulke, Zweben, Terry Physics operator: R. Granetz ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00. Bake at 60 C overnight as well, if possible. Run begins at 09:00 and ends at 17:00. Power systems the same as on 1030502025 (0.8 MA, 5.4 T, lower single null) Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) Enable the following gate valves, assuming no vacuum problems: ECE, DNB ------------------------------------------------------------------------------- RF Setup: All 4 transmitters in Run On by 08:00. ------------------------------------------------------------------------------- Run Plan: The first half of the day will be devoted to MP 332 and to boronization recovery of the antennas. The 2nd half will be devoted to MP 330 (vary Btor to change RF resonance location from core to edges) 001 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.15] sec E: 0.75 MW [.6-1.15] sec J: 1. MW [.6-1.15] sec Result: NTP (no target plasma) 002 cycle test 003 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.15] sec E: 0.75 MW [.6-1.15] sec J: 1. MW [.6-1.15] sec Result: plasma. D: max faults E: max faults J: faults 004 NTP 005 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.15] sec E: 0.75 MW [.6-1.15] sec J: 1. MW [.6-1.15] sec Result: plasma. D: max faults - poor match E: max faults - arcing J: max faults - poor match on J4 006 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1.0 MW [.6-1.1] sec Result: NTP 007 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: NTP 008 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: plasma. D: max faults - better match E: max faults - arcing J: max faults - just missed match on J4 009 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: NTP 010 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: NTP 011 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: NTP 012 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: plasma. D: max faults - better match E: max faults - arcing J: max faults - 013 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: NTP noticed that the phase was nearly 180deg off because we removed a delay line from J4 changed the phase shifter to 210deg 014 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: NTP 015 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: plasma. D: max faults E: max faults J: max faults - still mismatched 016 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: NTP 017 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: NTP 018 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: NTP 019 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: NTP 020 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: NTP 021 Ip~0.8 MA, 5.4 T, nl~0.5 LSN D: 0.75 MW [.6-1.1] sec E: 0.75 MW [.6-1.1] sec J: 1. MW [.6-1.1] sec Result: plasma. D: max faults E: max faults J: max faults - still mismatched Run summary: Appear to have improved the phase lock time by removing a short cable from J4. The collatoral problem was that the phase between J3 and J4 changed to nearly 0 phase. Discharges were required to change the phase back to heating phase and made tuning difficult for J-port. J-port vacuum conditioning was better than after the last boronization (same as last campaign). The antenna quickly conditioned to ~32 kv. |
| Entered: Jul 7 2004 03:49:32:850PM |
| Author: Robert Granetz |
| This run has been split between MP 332 (morning - piggy back) and MP 330a (afternoon). This report addresses the MP 332 piggyback part of the experiment and the MP 330a part of the experiment. For the MP 332 part --------------------------------------------------------------- We desire to find experimentally at which field and current the F-probe magnetically maps to the observation region of the GPI system. This is in order to make a simultaneous spatiotemporal measurement of plasma density and plasma potential fluctuations. The mapping should occur at B_t=5.4 T and I_p between 570 and 630 kA. We will plunge the probe at currents of 570kA, 585 kA, 600 kA, 615kA, and 630kA and look at the cross-correlation between I-sat and V-floating signals on the probe and the light fluctuations on the radial array of GPI views. On this day 1030603 only 2 different current values could be tested: # 1030603008: 600kA (time of probe plunge maximum=1.3 and 1.5 s; diode data @300kHz) # 1030603021: 590kA (time of probe plunge maximum=1.25 s; diode data @300kHz) The efit reconstruction shows clear mapping and a significant correlation between the F-probe data and the diode data was found, mainly consistent with the calculations. Shots for the other proposed current values are re-scheduled for 06.04.2003. On 1030604 we continued the piggyback turbulence mapping experiments of 06-03-2003. The plasma currents were varied between 590-640kA in 8 successful shots: # 1030604005: I_p=600kA (time of probe plunge maximum=1.25 s; diode data @1 MHz) # 1030604006: I_p=600kA, slightly lower density (time of probe plunge maximum=1.25 s; diode data @1 MHz) # 1030604007: I_p=590kA (time of probe plunge maximum=1.25 s; diode data @1 MHz) # 1030604009: I_p=590kA (time of probe plunge maximum=1.25 s; diode data @1 MHz) # 1030604010: I_p=620kA (time of probe plunge maximum=1.25 s; diode data @1 MHz) # 1030604014: I_p=620kA, density raised to nl=1.2e20 (time of probe plunge maximum=1.25 s; diode data @1 MHz) # 1030604016: I_p=610kA, density decreased to nl=1e20 (time of probe plunge maximum=1.25 s; diode data @1 MHz) # 1030604017: I_p=640kA (time of probe plunge maximum=1.25 s; diode data @1 MHz) RESULTS: 1. Correlation analysis shows a typical correlation between F-probe and diode data of 25-30%, which is clearly above the noise level. The higher correlation values were with the floating potential signals while the 0.25 value was for correlations with I_sat. The noise level of the correlation was typically <0.1. 2. For different plasma currents the correlation was found generally in agreement with the respective efit calculations. Typically an "above-noise" correlation was seen on ~3 diode views, centered on the view consistent with the EFIT mapping. 3. A localized influence of the F-probe was clearly visible in the diode raw data and indications are also observed in the PSI camera images. 4. An increase in density from nl=1e20 to nl=1.2e20 seems to decrease the correlation. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:18:067PM |
| Author: Robert Granetz |
| Physics operator summary for run 1030603 (Tuesday): Boronization recovery MP 332 - New approach to study of turbulent edge plasma fluctuations MP 330 - Edge minority heating for H-mode control Session leader: O. Grulke, S. Zweben, J. Terry Physics operator: R. Granetz Engineers in charge: G. Dekow/E. Fitzgerald/W. Parkin Summary: We certainly did not recover from the weekend's boronization. The latter half of the day had only a 32% success rate. We tried varying the pre-fill pressure, increasing Br0, and between-shot ECDC, all to no avail. Let's hope that a night of ECDC will turn things around. The first half of the day was lost due to an MDSplus software problem, which cropped up after the mdstreeshr.so was modified prior to today's run. This corrupted the data in the hybrid tree, with subsequent failure of hybrid control. We barely got a start on MP 332, with two values of the current plateau. Scorecard: 6 plasmas 13 fizzles 1 duds (MDSplus software problem) 1 test or no-power shot cycle 0 aborted and/or screwed up by computer problems ---------- 21 total ------------------------------------------------------------------------------- Engineering setup for Tuesday, 03 June 2003 Purpose: MP 332 - New approach to study of turbulent edge plasma fluctuations MP 330 - Edge minority heating for H-mode control and boronization recovery Session leader: Grulke, Zweben, Terry Physics operator: R. Granetz ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00. Bake at 60 C overnight as well, if possible. Run begins at 09:00 and ends at 17:00. Power systems the same as on 1030502025 (0.8 MA, 5.4 T, lower single null) Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) Enable the following gate valves, assuming no vacuum problems: ECE, DNB ------------------------------------------------------------------------------- RF Setup: All 4 transmitters in Run On by 08:00. ------------------------------------------------------------------------------- Run Plan: The first half of the day will be devoted to MP 332 and to boronization recovery of the antennas. The 2nd half will be devoted to MP 330 (vary Btor to change RF resonance location from core to edges) ------------------------------------------------------------------------------- ECDC was done overnight, as well as a 60 C bake. Hybrid coldstart done by the engineering group; no errors found Tried to load PCS segment 2 from shot 1030502025 (0.8 MA, 5.4 T, single null lower), segment 1 from shot 1030530034 (last shot from last Friday). Then I adjusted the nl_04 up to 1.e20 m-2, and programmed in a rampdown of Ip down to a flattop of 630 kA for 250 ms from t=1.250 to 1.500 s. HOWEVER, PCS hung when I tried to load the shot into model. I tried this several times, without success. So Josh had to figure out the problem. (He made a small modification to PCS yesterday, which shouldn't have caused this problem.) ------------------------------------------------------------------------------- Since the RF was firing into the vacuum chamber before the run began, I requested 10 minutes of ECDC before the first plasma shot. Start of run was delayed by 30 minutes due to PCS software bug. Shot 01 -- Dud. Many power supplies failed to go in segment 1. Steve Wolfe reports that the hybrid did not have any finite outputs in segment 1. Problem with wavegen? Steve did another coldstart and a hybrid test shot, and the wavegen again failed to output anything. We're having a long break while Steve and Josh work on the hybrid problem. Steve, Tom, and Josh have concluded that this was a software problem which arose because of an incorrect version of mdstreeshr.so that somehow became the active version. (Tom and Josh were both working on MDS software since the last run.) Next shot: no-power test to make sure the wavegen puts out the correct signals. Shot 02 -- Test. Hybrid output looks good. Next shot: go for plasma. Shot 03 -- Plasma. Disrupted at t=1.28 s, during the rampdown to the plateau level. Gaps increase around that time for some reason. Next shot: start Ip plateau rampdown earlier to reduce demands on PF supplies. Shot 04 -- Fizzle. Next shot: reduce pre-fill puff by 1 ms. Shot 05 -- Plasma. Good shot. Plateau level is 590 kA (asked for 630 kA) for 0.25 s. NL_04=1.1e20 m-2. Startup is still ugly. Next shot: increase plateau duration to 0.40 s by starting the rampdown earlier, and increase plateau current by 10 kA. Shot 06 -- Fizzle. Next shot: reduce pre-fill puff by another 1 ms. Shot 07 -- Fizzle. Next shot: put the pre-fill back to the original value. Shot 08 -- Plasma. Good shot. Plateau = 600 kA for 0.4 s. NL_04=1.2e20 m-2. Ninja is puffing starting at t=1.1 s, and it can be seen on the GHLIM video images. It also raises the density slightly. Next shot: reduce programmed nl_04 to 0.9e20 m-2 (was 1.0e20 m-2). Shot 09 -- Fizzle. Next shot: no changes. Shot 10 -- Fizzle. Next shot: reduce pre-fill by 3 ms (to 24 ms) Shot 11 -- Fizzle. Current rise was too fast this time. Next shot: increase pre-fill by 1 ms. Shot 12 -- Plasma. Good shot. Plateau = 610 kA for 0.4 s. NL_04=1.0e20 m-2. Next shot: reduce Ip in plateau by 15 kA. Increase pre-fill puff by another 1 ms. Shot 13 -- Fizzle. Next shot: no changes Shot 14 -- Fizzle. Next shot: no changes Shot 15 -- Plasma. Good shot. Plateau = 590 kA. Still not a good startup. Next shot: no changes Shot 16 -- Fizzle. Next shot: increase pre-fill by another 1 ms. Shot 17 -- Fizzle. Next shot: increase Br0 by 0.5 mT (Ian's suggestion), and ECDC for a few minutes between shots. Shot 18 -- Fizzle. Next shot: reduce pre-fill by 2 ms. Shot 19 -- Fizzle. Next shot: take another 1 ms off the pre-fill Shot 20 -- Fizzle. Next shot: reload shot 15 (longer pre-fill; remove Br0 tweak) Shot 21 -- Plasma. Good shot. Plateau current = 600 kA. Startup still was bad. End of run |
| Session Leader Comments |
| Physics Operator Comments | |||
| Jun 3 2003 09:14:28:780AM | Robert Granetz | Engineering setup for Tuesday, 03 June 2003 Purpose: MP 332 - New approach to study of turbulent edge plasma fluctuations MP 330 - Edge minority heating for H-mode control and boronization recovery Session leader: Grulke, Zweben, Terry Physics operator: R. Granetz ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00. Bake at 60 C overnight as well, if possible. Run begins at 09:00 and ends at 17:00. Power systems the same as on 1030502025 (0.8 MA, 5.4 T, lower single null) Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) Enable the following gate valves, assuming no vacuum problems: ECE, DNB ------------------------------------------------------------------------------- RF Setup: All 4 transmitters in Run On by 08:00. ------------------------------------------------------------------------------- Run Plan: The first half of the day will be devoted to MP 332 and to boronization recovery of the antennas. The 2nd half will be devoted to MP 330 (vary Btor to change RF resonance location from core to edges) | |
| Jun 3 2003 09:14:42:170AM | Robert Granetz | ECDC was done overnight, as well as a 60 C bake. Hybrid coldstart done by the engineering group; no errors found Tried to load PCS segment 2 from shot 1030502025 (0.8 MA, 5.4 T, single null lower), segment 1 from shot 1030530034 (last shot from last Friday). Then I adjusted the nl_04 up to 1.e20 m-2, and programmed in a rampdown of Ip down to a flattop of 630 kA for 250 ms from t=1.250 to 1.500 s. HOWEVER, PCS hung when I tried to load the shot into model. I tried this several times, without success. So Josh had to figure out the problem. (He made a small modification to PCS yesterday, which shouldn't have caused this problem.) | |
| Jun 3 2003 10:48:22:273AM | 1030603001 | Robert Granetz | Shot 01 -- Dud. Many power supplies failed to go in segment 1. Steve Wolfe reports that the hybrid did not have any finite outputs in segment 1. Problem with wavegen? Steve did another coldstart and a hybrid test shot, and the wavegen again failed to output anything. |
| Jun 3 2003 10:48:34:493AM | 1030603001 | Robert Granetz | We're having a long break while Steve and Josh work on the hybrid problem. |
| Jun 3 2003 12:50:53:067PM | 1030603001 | Robert Granetz | Steve, Tom, and Josh have concluded that this was a software problem which arose because of an incorrect version of mdstreeshr.so that somehow became the active version. (Tom and Josh were both working on MDS software since the last run.) |
| Jun 3 2003 12:51:03:490PM | 1030603001 | Robert Granetz | Next shot: no-power test to make sure the wavegen puts out the correct signals. |
| Jun 3 2003 01:16:08:680PM | 1030603002 | Robert Granetz | Shot 02 -- Test. Hybrid output looks good. Next shot: go for plasma. |
| Jun 3 2003 01:12:52:850PM | 1030603003 | Robert Granetz | Shot 03 -- Plasma. Disrupted at t=1.28 s, during the rampdown to the plateau level. Gaps increase around that time for some reason. Next shot: start Ip plateau rampdown earlier to reduce demands on PF supplies. |
| Jun 3 2003 01:15:33:303PM | 1030603004 | Robert Granetz | Shot 04 -- Fizzle. Next shot: reduce pre-fill puff by 1 ms. |
| Jun 3 2003 01:32:57:520PM | 1030603005 | Robert Granetz | Shot 05 -- Plasma. Good shot. Plateau level is 590 kA (asked for 630 kA) for 0.25 s. NL_04=1.1e20 m-2. Startup is still ugly. Next shot: increase plateau duration to 0.40 s by starting the rampdown earlier, and increase plateau current by 10 kA. |
| Jun 3 2003 01:39:15:870PM | 1030603006 | Robert Granetz | Shot 06 -- Fizzle. Next shot: reduce pre-fill puff by another 1 ms. |
| Jun 3 2003 01:53:18:647PM | 1030603007 | Robert Granetz | Shot 07 -- Fizzle. Next shot: put the pre-fill back to the original value. |
| Jun 3 2003 02:12:56:487PM | 1030603008 | Robert Granetz | Shot 08 -- Plasma. Good shot. Plateau = 600 kA for 0.4 s. NL_04=1.2e20 m-2. Ninja is puffing starting at t=1.1 s, and it can be seen on the GHLIM video images. It also raises the density slightly. Next shot: reduce programmed nl_04 to 0.9e20 m-2 (was 1.0e20 m-2). |
| Jun 3 2003 02:20:32:447PM | 1030603009 | Robert Granetz | Shot 09 -- Fizzle. Next shot: no changes. |
| Jun 3 2003 02:36:21:617PM | 1030603010 | Robert Granetz | Shot 10 -- Fizzle. Next shot: reduce pre-fill by 3 ms (to 24 ms) |
| Jun 3 2003 03:04:04:230PM | 1030603011 | Robert Granetz | Shot 11 -- Fizzle. Current rise was too fast this time. Next shot: increase pre-fill by 1 ms. |
| Jun 3 2003 03:04:15:420PM | 1030603012 | Robert Granetz | Shot 12 -- Plasma. Good shot. Plateau = 610 kA for 0.4 s. NL_04=1.0e20 m-2. Next shot: reduce Ip in plateau by 15 kA. Increase pre-fill puff by another 1 ms. |
| Jun 3 2003 03:13:15:707PM | 1030603013 | Robert Granetz | Shot 13 -- Fizzle. Next shot: no changes |
| Jun 3 2003 03:28:29:407PM | 1030603014 | Robert Granetz | Shot 14 -- Fizzle. Next shot: no changes |
| Jun 3 2003 03:39:05:990PM | 1030603015 | Robert Granetz | Shot 15 -- Plasma. Good shot. Plateau = 590 kA. Still not a good startup. Next shot: no changes |
| Jun 3 2003 03:51:44:410PM | 1030603016 | Robert Granetz | Shot 16 -- Fizzle. Next shot: increase pre-fill by another 1 ms. |
| Jun 3 2003 04:07:57:577PM | 1030603017 | Robert Granetz | Shot 17 -- Fizzle. Next shot: increase Br0 by 0.5 mT (Ian's suggestion), and ECDC for a few minutes between shots. |
| Jun 3 2003 04:24:04:010PM | 1030603018 | Robert Granetz | Shot 18 -- Fizzle. Next shot: reduce pre-fill by 2 ms. |
| Jun 3 2003 04:35:41:287PM | 1030603019 | Robert Granetz | Shot 19 -- Fizzle. Next shot: take another 1 ms off the pre-fill |
| Jun 3 2003 05:01:03:850PM | 1030603020 | Robert Granetz | Shot 20 -- Fizzle. Next shot: reload shot 15 (longer pre-fill; remove Br0 tweak) |
| Jun 3 2003 05:02:23:120PM | 1030603021 | Robert Granetz | Shot 21 -- Plasma. Good shot. Plateau current = 600 kA. Startup still was bad. End of run |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:35:57:910AM | Plasma | Bad | Data System Problems with Hybrid Outputs to Power Supplies |
| 2 | 12:49:38:520PM | Test | Ok | |
| 3 | 12:57:48:150PM | Plasma | Ok | |
| 4 | 01:10:27:533PM | Plasma | Ok | |
| 5 | 01:22:50:870PM | Plasma | Ok | |
| 6 | 01:35:09:473PM | Plasma | Ok | |
| 7 | 01:47:41:580PM | Plasma | Ok | |
| 8 | 02:01:40:480PM | Plasma | Ok | |
| 9 | 02:16:03:960PM | Plasma | Ok | |
| 10 | 02:28:38:627PM | Plasma | Ok | |
| 11 | 02:41:20:277PM | Plasma | Ok | |
| 12 | 02:54:08:660PM | Plasma | Ok | |
| 13 | 03:09:20:940PM | Plasma | Ok | |
| 14 | 03:22:01:010PM | Plasma | Ok | |
| 15 | 03:34:34:410PM | Plasma | Ok | |
| 16 | 03:47:58:920PM | Plasma | Ok | |
| 17 | 04:00:35:713PM | Plasma | Ok | |
| 18 | 04:19:23:633PM | Plasma | Ok | |
| 19 | 04:32:17:643PM | Plasma | Ok | |
| 20 | 04:45:07:777PM | Plasma | Ok | |
| 21 | 04:57:46:710PM | Plasma | Ok | |