| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Unknown |
| Physics operator(s): | Joseph Snipes |
| Engineering operator(s): | Bill Byford,Gary Dekow,Bill Parkin |
| Engineering Operator Run Comment |
| Machine Clean-up PO:Snipes; EO:Dekow/Byford/Parkin |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:17:630PM |
| Author: To Be Determined |
| Run Plan for Tuesday, April 29, 2003 Physop: Snipes Purpose: Clean-up, RF conditioning, diagnostic checkout Engineering setup _________________ ECDC in D2 overnight prior to run. 60C bake Run starts at 9:00AM Power systems as on 1030429024 Gas setup: fill B-top with 6 psi of D2 Hybrid enabled (PG4) fill B-side lower with 1 psi of Ar Hybrid enabled (PG1) fill B-side upper with 10 psi of D2 Hybrid DISABLED (PG2) fill C-side with 30 psi of D2 Hybrid enabled (PG3) ICRF: Transmitters 1 and 2 should be in Run On by 7:00 am. Enable the ECE and DNB gate-valves, assuming no vacuum problems. Summary: Overall, it was a good run with upper null plasmas throughout the day and with Active MHD in piggy-back mode and ICRF up to 4 MW where they also found mode conversion. Thomson scattering tests were done as well as tests of the DNB and the fast scanning probe. 1 0.000 0.006 2 1.951 0.798 3 1.836 0.798 4 0.385 0.661 5 1.905 0.796 6 1.840 0.795 No Ip 7 8 0.000 0.002 9 1.954 0.789 10 1.689 0.792 11 1.677 0.788 12 1.691 0.791 13 1.451 0.793 14 1.560 0.797 15 1.437 0.806 16 1.506 0.796 17 1.674 0.795 18 1.839 0.796 19 0.914 0.830 20 0.000 0.039 21 1.734 0.797 22 1.844 0.794 23 0.735 0.789 24 1.209 0.796 25 1.901 0.776 Finished summary for 1030430 Total of 25 shots. 25 shots. 21 plasmas. 1 fizzles. 3 tests. Shot 1: EF1 test shot. Shot 2: Copied shot 1030429024 and increased the prefill by 2 ms to 27 ms duration. Added a slow ramp in the density to nl04 = 1.23 x 10^20 m^-2. Good shot ramped down well. Some hard x rays early. Shot 3: Did not get the requested density ramp. Reload and try again. Good shot. Start up is better though there are still some hard x rays. Ramp down was a bit worse but still not bad. Shot 4: Current decays at 0.2 s leading to a disruption at 0.3 s. Shot 5: Reduced prefill to 24 ms duration expecting excess gas after the disruption. Good shot though the startup was worse, the rampdown was good. Shot 6: Raised prefill to 27 ms duration again. Good shot. Low hard x rays. Good current rise. Disrupted in rampdown. Shot 7: Data system problem. Shot 8: Cycle test. Shot 9: Repeat with DNB firing at 1 s and fast scanning probe inserting three times at 0.7, 0.95, and 1.1 s. Good shot. Shot 10: I realized that the density was not ramping as requested and Wolfe pointed out that we are using Segment 3 rather than Segment 2, which is where I had programmed the density ramp. So, I've now changed Segment 3 to have a density ramp as well. Good shot. Shot 11: Repeat. Good shot. Shot 12: Repeat. Good shot. Shot 13: Repeat. Good shot but the hard x rays early in the shot have returned and the plasma disrupted at 1.45 s. Maybe the RF is overheating the upper gusset?! Shot 14: Reduced RXU by 2 cm to -0.02 throughout the shot to attempt to avoid the strike point heating the upper gusset. Slightly better shot. The current rise went fine with little hard x rays. Still, the plasma disrupted at 1.55 s. Shot 15: Reduced RXU by another 2 cm to -0.04 throughout the shot to attempt to avoid the disruption early in the rampdown. Disrupted at 1.45 s. Shot 16: Reduced RXU to -0.027. Still disrupted at 1.5 s. There appears to be a MARFE starting at about 0.4 s even though the density is not very high. Shot 17: Reduced RXU to -0.01. Also reduced the density from 0.4 s to 1.2 s to see if I can get rid of the MARFE. The sawteeth go away early, so maybe the density is too low at that time. Otherwise, it is a good shot though it still disrupts at 1.65 s. Shot 18: Increased the density early and lowered it late to give a more constant density throughout the shot. Good shot. Shot 19: Increased the density a little bit. Disrupted at 0.91 s. Oscillations in EF1L from 0.6 to 0.8 s indicate there is a problem with EF1L. Shot 20: Increased the density a little bit more. Fizzle! Shot 21: Repeat. Good shot. Shot 22: Repeat. Good shot. Shot 23: EF1L went berserk at 0.6 s and led to the disruption. Shot 24: EF1L went berserk at 1 s and led to the disruption at 1.2 s. Shot 25: Repeat shot 24 after some work was done on EF1L. Hard x rays early and a MARFE later, but otherwise a good shot. |
| Session Leader Comments |
| Physics Operator Comments | |||
| Apr 30 2003 08:35:40:433AM | Joseph Snipes | Run Plan for Tuesday, April 29, 2003 Physop: Snipes Purpose: Clean-up, RF conditioning, diagnostic checkout Engineering setup _________________ ECDC in D2 overnight prior to run. 60C bake Run starts at 9:00AM Power systems as on 1030429024 Gas setup: fill B-top with 6 psi of D2 Hybrid enabled (PG4) fill B-side lower with 1 psi of Ar Hybrid enabled (PG1) fill B-side upper with 10 psi of D2 Hybrid DISABLED (PG2) fill C-side with 30 psi of D2 Hybrid enabled (PG3) ICRF: Transmitters 1 and 2 should be in Run On by 7:00 am. Enable the ECE and DNB gate-valves, assuming no vacuum problems. | |
| Apr 30 2003 09:01:55:473AM | 1030430001 | Joseph Snipes | Shot 1: EF1 test shot. |
| Apr 30 2003 12:23:04:033PM | 1030430001 | Joseph Snipes | Shot 10: I realized that the density was not ramping as requested and Wolfe pointed out that we are using Segment 3 rather than Segment 2, which is where I had programmed the density ramp. So, I've now changed Segment 3 to have a density ramp as well. Good shot. |
| Apr 30 2003 09:30:03:643AM | 1030430002 | Joseph Snipes | Shot 2: Copied shot 1030429024 and increased the prefill by 2 ms to 27 ms duration. Added a slow ramp in the density to nl04 = 1.23 x 10^20 m^-2. Good shot ramped down well. Some hard x rays early. |
| Apr 30 2003 09:57:26:657AM | 1030430003 | Joseph Snipes | Shot 3: Did not get the requested density ramp. Reload and try again. Good shot. Start up is better though there are still some hard x rays. Ramp down was a bit worse but still not bad. |
| Apr 30 2003 10:09:07:017AM | 1030430004 | Joseph Snipes | Shot 4: Current decays at 0.2 s leading to a disruption at 0.3 s. |
| Apr 30 2003 10:29:41:207AM | 1030430005 | Joseph Snipes | Shot 5: Reduced prefill to 24 ms duration expecting excess gas after the disruption. Good shot though the startup was worse, the rampdown was good. |
| Apr 30 2003 10:45:15:463AM | 1030430006 | Joseph Snipes | Shot 6: Raised prefill to 27 ms duration again. Good shot. Low hard x rays. Good current rise. Disrupted in rampdown. |
| Apr 30 2003 11:43:53:100AM | 1030430007 | Joseph Snipes | Shot 7: Data system problem. |
| Apr 30 2003 11:44:05:290AM | 1030430008 | Joseph Snipes | Shot 8: Cycle test. |
| Apr 30 2003 11:42:49:053AM | 1030430009 | Joseph Snipes | Shot 9: Repeat with DNB firing at 1 s and fast scanning probe inserting three times at 0.7, 0.95, and 1.1 s. Good shot. |
| Apr 30 2003 12:23:30:410PM | 1030430011 | Joseph Snipes | Shot 11: Repeat. Good shot. |
| Apr 30 2003 12:32:56:143PM | 1030430012 | Joseph Snipes | Shot 12: Repeat. Good shot. |
| Apr 30 2003 12:41:53:893PM | 1030430013 | Joseph Snipes | Shot 13: Repeat. Good shot but the hard x rays early in the shot have returned and the plasma disrupted at 1.45 s. Maybe the RF is overheating the upper gusset?! |
| Apr 30 2003 12:59:05:497PM | 1030430014 | Joseph Snipes | Shot 14: Reduced RXU by 2 cm to -0.02 throughout the shot to attempt to avoid the strike point heating the upper gusset. Slightly better shot. The current rise went fine with little hard x rays. Still, the plasma disrupted at 1.55 s. |
| Apr 30 2003 01:16:04:273PM | 1030430016 | Joseph Snipes | Shot 15: Reduced RXU by another 2 cm to -0.04 throughout the shot to attempt to avoid the disruption early in the rampdown. Disrupted at 1.45 s. |
| Apr 30 2003 01:21:32:330PM | 1030430016 | Joseph Snipes | Shot 16: Reduced RXU to -0.027. Still disrupted at 1.5 s. There appears to be a MARFE starting at about 0.4 s even though the density is not very high. |
| Apr 30 2003 01:45:35:803PM | 1030430017 | Joseph Snipes | Shot 17: Reduced RXU to -0.01. Also reduced the density from 0.4 s to 1.2 s to see if I can get rid of the MARFE. The sawteeth go away early, so maybe the density is too low at that time. Otherwise, it is a good shot though it still disrupts at 1.65 s. |
| Apr 30 2003 02:16:04:600PM | 1030430018 | Joseph Snipes | Shot 18: Increased the density early and lowered it late to give a more constant density throughout the shot. Good shot. |
| Apr 30 2003 03:59:08:867PM | 1030430019 | Joseph Snipes | Shot 19: Increased the density a little bit. Disrupted at 0.91 s. Oscillations in EF1L from 0.6 to 0.8 s indicate there is a problem with EF1L. |
| Apr 30 2003 02:22:33:830PM | 1030430020 | Joseph Snipes | Shot 20: Increased the density a little bit more. Fizzle! |
| Apr 30 2003 02:45:12:880PM | 1030430021 | Joseph Snipes | Shot 21: Repeat. Good shot. |
| Apr 30 2003 02:53:43:767PM | 1030430022 | Joseph Snipes | Shot 22: Repeat. Good shot. |
| Apr 30 2003 04:00:05:963PM | 1030430023 | Joseph Snipes | Shot 23: EF1L went berserk at 0.6 s and led to the disruption. |
| Apr 30 2003 04:01:44:293PM | 1030430024 | Joseph Snipes | Shot 24: EF1L went berserk at 1 s and led to the disruption at 1.2 s. |
| Apr 30 2003 05:12:16:810PM | 1030430025 | Joseph Snipes | Shot 25: Repeat shot 24 after some work was done on EF1L. Hard x rays early and a MARFE later, but otherwise a good shot. |
| Apr 30 2003 05:21:10:260PM | 1030430025 | Joseph Snipes | Summary: Overall, it was a good run with upper null plasmas throughout the day and with Active MHD in piggy-back mode and ICRF up to 4 MW where they also found mode conversion. Thomson scattering tests were done as well as tests of the DNB and the fast scanning probe. 1 0.000 0.006 2 1.951 0.798 3 1.836 0.798 4 0.385 0.661 5 1.905 0.796 6 1.840 0.795 No Ip 7 8 0.000 0.002 9 1.954 0.789 10 1.689 0.792 11 1.677 0.788 12 1.691 0.791 13 1.451 0.793 14 1.560 0.797 15 1.437 0.806 16 1.506 0.796 17 1.674 0.795 18 1.839 0.796 19 0.914 0.830 20 0.000 0.039 21 1.734 0.797 22 1.844 0.794 23 0.735 0.789 24 1.209 0.796 25 1.901 0.776 Finished summary for 1030430 Total of 25 shots. 25 shots. 21 plasmas. 1 fizzles. 3 tests. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:07:22:560AM | Test | Ok | EF1 Power Supply PLC Test |
| 2 | 09:24:34:163AM | Plasma | Ok | |
| 3 | 09:49:20:317AM | Plasma | Ok | |
| 4 | 10:01:49:990AM | Plasma | Ok | |
| 5 | 10:24:00:680AM | Plasma | Ok | |
| 6 | 10:36:32:653AM | Plasma | Ok | |
| 8 | 11:28:51:750AM | Test | Ok | Data System Test |
| 9 | 11:39:45:547AM | Plasma | Ok | |
| 10 | 11:54:56:790AM | Plasma | Ok | |
| 11 | 12:11:09:690PM | Plasma | Ok | |
| 12 | 12:23:40:457PM | Plasma | Ok | |
| 13 | 12:36:12:760PM | Plasma | Ok | |
| 14 | 12:49:11:090PM | Plasma | Ok | |
| 15 | 01:02:01:220PM | Plasma | Ok | |
| 16 | 01:15:09:833PM | Plasma | Ok | |
| 17 | 01:31:46:267PM | Plasma | Ok | |
| 18 | 01:46:27:197PM | Plasma | Ok | |
| 19 | 02:01:09:000PM | Plasma | Ok | |
| 20 | 02:19:43:230PM | Plasma | Ok | |
| 21 | 02:32:24:610PM | Plasma | Ok | |
| 22 | 02:45:26:770PM | Plasma | Ok | |
| 23 | 02:59:02:180PM | Plasma | Ok | |
| 24 | 03:14:44:800PM | Plasma | Bad | EF1 Self Powered Crowbar Fired |
| 25 | 05:07:14:427PM | Plasma | Ok | |