| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Catherine Fiore |
| Physics operator(s): | Bill Rowan |
| Engineering operator(s): | Bill Cochran,Gary Dekow |
| Engineering Operator Run Comment |
| MP257 ITB Control - SL: Fiore PO: Rowan EO: Dekow/Cochran |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:24:273PM |
| Author: To Be Determined |
MP 257 -- ITB control Session leader: C. Fiore Physics operator: B. Rowan Engineering operators: G. Dekow/B. Cochran Run plan: First RF plasma shot, load from 1000523008 (1.0 MA, 5.3 T). The purpose of this experiment is to study the properties of the spontaneous internal transport barrier which forms following the H to L mode transition on Alcator C-Mod. This will start by establishing the experimental technique for forming it consistently particularly in conjunction with the diagnostic set needed to study it, then by using several possible rf injection scenarios to try and control it by prolonging its lifetime. The use of the rf injection for additional heating after formation should also be tested. Since the CXRS system will not be available, we will use HIREX to obtain ion temperature profile data. This will require taking 2 or 3 shots at each condition to obtain sufficient HIREX signal with a data collection window of 20 ms. First, set up a reliable H-mode plasma at 5.3 T, 1 MA, 1.5 to 2 MW rf power, nl_1=1e20. Program rf to drop to .5 MW for 100 ms, then return to the original value for the duration. The timing of the HIREX data collection window should be set to coordinate with the point that the rf power is cut, so that a pre and post transition ion temperature profile could be obtained. Repeat for as many shots as is needed by John Rice. Repeat with the 0.5MW part of the rf pulse shortened to 50 ms in order to reheat the plasma before the ITB dissipates. Again, take up to 3 shots to get the HIREX data. If these shots have gone well and good progress has been made, repeat at 0.8 MA plasma current, up to 3 shots as needed. RF waveform TBD by performance on first part of the run. Next, lower field to 4.5 T and set up a reliable H-mode plasma, 800 kA, 1.5 to 2 MW rf power, nl_1=1e20. Program rf to drop to .5 MW for 100 ms, then return to the original value for the duration. Repeat for as many shots as is needed by John Rice. Repeat with the 0.5MW part of the rf pulse shortened to 50 ms in order to reheat the plasma before the ITB dissipates. Again, take up to 3 shots to get the HIREX data. If time permits, repeat the 4.5 T experiment at a different plasma current. If run is going extremely well, set up to ramp the toroidal field from 5.1 T to 4.5 T and try to trigger an H to L transition during the ramp. Resources: 4.1 Machine and Plasma Parameters} Toroidal Field: 5.3 T and 4.5 T Plasma Current: 1. MA to start, 0.8 MA possible. Working gas species: D, H minority Density: about 1e20 on nl_1 4.2 Auxiliary Systems RF Power, pulse length, phasing: 1.5 to 2 MW, drop to 0.5 MW 4.3 Diagnostics Hirex for Ti profiles Visible Bremmstrahlung array. GPC 1 and 2 Neutron diagnostics All standard core diagnostics DNB diagnostics as available ----------------------------------- Overall, the run was productive. The EN ITB formed easily and predictably, occurring on all but one of the good shots. Unfortunately we were plagued by computer and camac problems at the beginning. HIREX had camac problems throughout, and we were not able to get ion temperature profile data as a result. We were able to get multiple current shots at 3 different toroidal field values, and EN's at two different rf power levels for most of the shots. Of 24 shots, 19 provided good data. The details follow: Shot 1 Good shot. Neutron rate reaches 2E13. ITB right on schedule following drop in RF power at 1 second, peaks at about 1.04 second. No ECE for some reason. Shot 2 Good shot. Repeat of 1. We've lost GPC, but GPC2 is good. HIREX had a camac problem. We'll hold here until we get a good data set on HIREX. Shot 3 Good shot. Repeat of 1. GPC magically reappeared, but HIREX camac failed. No HIREX data. Try again. Shots 4 and 5 were lost from engineering problems Shot 6 Shot went. However there was an unscheduled H to L transition which caused the ITB to come early. Neutron rate was lower and the core radiation was higher than on the other shots. Still no HIREX. We will try again. Shot 7 was just like shot 6, with the H to L transition occurring earlier than the power drop. The neutron rate ITB peak was substantially higher than on shots 1-3. The H-mode quality is not as good as earlier (less EDA) with strong impurity accumulations. The H-mode neutron rate is half of what it was on the first 3 shots, about 1e13. An injection just after the rf turn on could be the problem. Still no HIREX data. XTOMO also still also has problems, so we let them go into the cell. Shot 8 had the ITB at the scheduled time with the rf power drop. There was also an H to L earlier which also resulted in a neutron rate peak. Unfortunately, we still have CAMAC trouble with HIREX and XTOMO. Shot 9 behaved like shots 1-3, but with a lower neutron rate spike following the transition. We will try a shot at 800 kA to see if we can control the H-mode better. Since there still is no HIREX, we will proceed with the low field part of the run following shot 10. Shot 10 was very nice, with the EN/ITB occurring at the scheduled time. We still have no HIREX data, so we are going to proceed with the low field part of the run, and reducing the field to 4.5 T. We are remaining at 800 kA. Shot 11 was good, at 4.5 T. The H to L transition was slightly earlier than planned because of an impurity injection. Neutron rate was down by an order of magnitude from the 5.3 T shots. Nice EN/ITB. John Rice went in to try and swap out the timing module on HIREX. Shot 12 had a spontaneous H to L transition, and went back into H mode during the ITB. The neutron rate stayed high for nearly 100 ms. A transition also occurred at the scheduled time, resulting in a second EN/ITB. HIREX is still out, so we will repeat this shot on 13, then try to go down in current. Shot 13 was very similar to shot 12. This time the neutron rate peak was higher, however, and again lasted quite long despite the return of the H-mode. We are no longer expecting anything from HIREX at this point, and are going to try scanning the current for the next several shots. Shot 14 was at 700 kA., and disrupted at 1.07 s. An H-mode formed, but no sawteeth were observed. An H to L transition occurred slightly earlier than the rf power dropped (probable disruption), and no increase in neutron rate was observed. We are going to raise the current to 900 kA. Shot 15 was at 900 kA. There were a number of H to L transitions, each of which were followed by a neutron rate peak. These did not last as long as they did during the 800 kA shot. We will repeat this shot, then go to 1MA. Shot 16 was at 900 kA, a repeat of shot 15, and virtually identical to it. There were a number of H to L transitions, each of which were followed by a neutron rate peak. These did not last as long as they did during the 800 kA shot. We will raise the current to 1MA. Shot 17 was at 1MA, and ran well. There were multiple H to L transitions, as in shots 15 and 16,each of which were followed by a neutron rate peak. We are now going to higher field, 4.9 T shot. Shot 18 was at 1MA, 4.9 T and ran well. There were multiple H to L transitions, each of which were followed by a neutron rate peak. We are now going to lower current, 900 kA. Shot 19 was at 0.9MA, 4.9 T and ran well. There were multiple H to L transitions, each of which were followed by a neutron rate peak. We are now going to lower current, 800 kA. Shot 20 fizzled. Shot 21 was 4.9 T, 800 kA and had one extra H to L transition beyond the scheduled ones. Neutron rate is peaking nicely. Next shot will be at 700 kA, same field. Shot 22 was 4.9 T, 700 kA and had only the scheduled H to L transitions. Neutron rate peak is apparent but small. Next shot will be at 600 kA, same field. Shot 23 disrupted after 0.3s. Steve Wolfe told Bill how to run 600 kA, so we'll make one more try. Shot 24 disrupted after 0.6s. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:11:380PM |
| Author: To Be Determined |
RUN PLAN: MP 257 -- ITB control Session leader: C. Fiore Physics operator: B. Rowan Engineering operators: G. Dekow/B. Cochran ------------------------------------------------------------------------------- Engineering setup for Thursday, 1000615: overnight ECDC in D2, stopping 1-2 hours prior to the run. Run begins at 9:00 and ends at 17:00. Power system setup as on 1000523008 Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled fill B-side upper with 10 psi of H Hybrid disable fill C-side with 30 psi of D2 Hybrid enabled J-bottom Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV DNB gate valve should be DISABLED at the start of the run. RF setup: D and E, pulse at 0.6s, 1.5 to 2 MW, drop to .5 MW at 1 s, increase to 1.5 or 2MW at 1.1 s. ------------------------------------------------------------------------------- First RF plasma shot, load from 1000523008 (1.0 MA, 5.3 T). The purpose of this experiment is to study the properties of the spontaneous internal transport barrier which forms following the H to L mode transition on Alcator C-Mod. This will start by establishing the experimental technique for forming it consistently particularly in conjunction with the diagnostic set needed to study it, then by using several possible rf injection scenarios to try and control it by prolonging its lifetime. The use of the rf injection for additional heating after formation should also be tested. Since the CXRS system will not be available, we will use HIREX to obtain ion temperature profile data. This will require taking 2 or 3 shots at each condition to obtain sufficient HIREX signal with a data collection window of 20 ms. First, set up a reliable H-mode plasma at 5.3 T, 1 MA, 1.5 to 2 MW rf power, nl_1=1e20. Program rf to drop to .5 MW for 100 ms, then return to the orgiginal value for the duration. The timing of the HIREX data collection window should be set to coordinate with the point that the rf power is cut, so that a pre and post transition ion temperature profile could be obtained. Repeat for as many shots as is needed by John Rice. Repeat with the 0.5MW part of the rf pulse shortened to 50 ms in order to reheat the plasma befire the ITB disipates. Again, take up to 3 shots to get the HIREX data. If these shots have gone well and good progress has been made, repeat at 0.8 MA plasma current, up to 3 shots as needed. RF waveform TBD by performance on first part of the run. Next, lower field to 4.5 T and set up a reliable H-mode plasma, 800 kA, 1.5 to 2 MW rf power, nl_1=1e20. Program rf to drop to .5 MW for 100 ms, then return to the orgiginal value for the duration. Repeat for as many shots as is needed by John Rice. Repeat with the 0.5MW part of the rf pulse shortened to 50 ms in order to reheat the plasma befire the ITB disipates. Again, take up to 3 shots to get the HIREX data. If time permits, repeat the 4.5 T experiment at a different plasma current. If run is going extremely well, set up to ramp the toroidal field from 5.1 T to 4.5 T and try to trigger an H to L transition during the ramp. Description of the run The reference shot for the first part of this run was 1000523008. This served as the template for the entire run with the exception of a few shots at the end. More about that later. The prefill pressure was changed slightly after the first shot to raise it into the 0.055 mT range A series of engineering failures and workstation partial freezes marred the run. The engineering problems were essentially resolved after shot 005. The computer freezes continued throughout the day. After shot 005, the run went well through changes of current and field until shot 020. That was a fizzle and was immediately remedied on shot 021 by a very slight lowering of BZ. The fizzle was the fault of the PhysOp who failed to watch the breakdown and initial current rise with sufficient care. BZ was rising all day. The final major problem of the run was an inability to provide a 600 kA shot. This discharge was obtained previously with difficulty by Wolfe. Following his suggestion, I attempted to reload the relevant parts of 1000523013. This resulted in a disruption, and further shots were not possible because we ran out of time. Shot by shot 001. Loaded shot 1000523008. 002. Good shot. Add 1 ms to the prefill as it seemed low at 0.046 mT 003. Good shot 004. Failure in engineering after entering pulse. 005. Failure in engineering. Chopper not ready. Backed out of shot. 006. Plasma. 007. Plasma. 008. Plasma oo9. Plasma 010. Plasma Ip reduced to 800 kA 011. Plasma Reduced BT to 4.5 T 012. Plasma 013. Plasma 014. Plasma. Reduced IP to 700 kA Disruption at approx 1.1 s 015. Plasma Increase IP to 900 kA 016. Plasma 017. Plasma Increase IP to 1 MA 018. Plasma Reduced TF to 4.9 T 019. Plasma Decreased IP to 900 kA 020. Fizzle Decreased Ip to 800 kA 021. Plasma Reduced BZ slightly 022. Plasma Reduced IP to 700 kA 023. Disruption Reduced IP to 600 kA 024. Disruption Attempted to imitate shot 1000523013 with regard to IP and Clearin Score Card Plasma 19 Disruptions 2 Fizzles 1 Duds 0 Engineering Failures 2 Total 24 |
| Session Leader Comments | |||
| Jun 15 2000 09:10:21:543AM | 1000615001 | Catherine Fiore | Shot 1 Good shot. Neutron rate reaches 2E13. ITB right on schedule following drop in RF power at 1 second, peaks at about 1.04 second. |
| Jun 15 2000 09:46:27:590AM | 1000615002 | Catherine Fiore | .Shot 2 Good shot, just like #1. Camac problems on HIREX, warming on GPC, but GPC2 is working fine. We'll repeat this shot until we get the HIREX data. |
| Jun 15 2000 10:07:51:873AM | 1000615003 | Catherine Fiore | Good shot, identical to 1 and 2. GPC data has reappeared, but HIREX got no data. We'll repeat this and hope we get HIREX back. XTOMO has camac problems as well. |
| Jun 15 2000 11:06:22:157AM | 1000615006 | Catherine Fiore | Shot went. However there was an unscheduled H to L transition which caused the ITB to come early. Neutron rate was lower and the core radiation was higher than on the other shots. Still no HIREX. We will try again. |
| Jun 15 2000 11:36:05:873AM | 1000615007 | Catherine Fiore | Shot 7 was just like shot 6, with the H to L transition occurring earlier than the power drop. The neutron rate ITB peak was substantially higher than on shots 1-3. The H-mode quality is not as good as earlier (less EDA) with strong impurity accumulations. The H-mode neutron rate is half of what it was on the first 3 shots, about 1e13. An injection just after the rf turn on could be the problem. Still no HIREX data. XTOMO also still also has problems, so we let them go into the cell. |
| Jun 15 2000 11:50:37:560AM | 1000615008 | Catherine Fiore | Shot 8 had the ITB at the scheduled time with the rf power drop. There was also an H to L earlier which also resulted in a neutron rate peak. Unfortunately, we still have CAMAC trouble with HIREX and XTOMO. |
| Jun 15 2000 12:16:20:403PM | 1000615009 | Catherine Fiore | Shot 9 behaved like shots 1-3, but with a lower neutron rate spike following the transition. We will try a shot at 800 kA to see if we can control the H-mode better. Since there still is no HIREX, we will proceed with the low field part of the run following shot 10. Joe Bosco has gone in to change the U-port adapter for XTOMO. |
| Jun 15 2000 12:37:57:153PM | 1000615010 | Catherine Fiore | Shot 10 was very nice, with the EN/ITB occurring at the scheduled time. We still have no HIREX data, so we are going to proceed with the low field part of the run, and reducing the field to 4.5 T. We are remaining at 800 kA. |
| Jun 15 2000 01:05:45:890PM | 1000615011 | Catherine Fiore | Shot 11 was good, at 4.5 T. The H to L transition was slightly earlier than planned because of an impurity injection. Neutron rate was down by an order of magnitude from the 5.3 T shots. Nice EN/ITB. John Rice went in to try and swap out the timing module on HIREX. |
| Jun 15 2000 01:22:19:670PM | 1000615012 | Catherine Fiore | Shot 12 had a spontaneous H to L transition, and went back into H mode during the ITB. The neutron rate stayed high for nearly 100 ms. A transition also occured at the scheduled time, resultin in a second EN/ITB. HIREX is still out, so we will repeat this shot on 13, then try to go down in current. |
| Jun 15 2000 01:39:37:420PM | 1000615013 | Catherine Fiore | Shot 13 was very similar to shot 12. This time the neutron rate peak was higher, however, and again lasted quite long despite the return of the H-mode. We are no longer expecting anything from HIREX at this point, and are going to try scanning the current for the next several shots. |
| Jun 15 2000 01:57:33:780PM | 1000615014 | Catherine Fiore | Shot 14 was at 700 kA., and disrupte at 1.07 ms. An H-mode formed, but no sawteeth were observed. An H to L transition occurred slightly earlier than the rf power dropped, and no increase in neutron rate was observed. We are going to raise the current to 900 kA. |
| Jun 15 2000 02:17:45:873PM | 1000615015 | Catherine Fiore | Shot 15 was at 900 kA. There were a number of H to L transitions, each of which were followed by a neutron rate peak. These did not last as long as they did during the 800 kA shot. We will repeat this shot, then go to 1MA. |
| Jun 15 2000 02:31:30:890PM | 1000615016 | Catherine Fiore | Shot 16 was at 900 kA, a repeat of shot 15, and virtually identical to it. There were a number of H to L transitions, each of which were followed by a neutron rate peak. These did not last as long as they did during the 800 kA shot. We will raise the current to 1MA. |
| Jun 15 2000 03:01:37:873PM | 1000615017 | Catherine Fiore | Shot 17 was at 1MA, and ran well. There were multiple H to L transitions, as in shots 15 and 16,each of which were followed by a neutron rate peak. We are now going to higher field, 4.9 T shot. |
| Jun 15 2000 03:20:35:810PM | 1000615018 | Catherine Fiore | Shot 18 was at 1MA, 4.9 T and ran well. There were multiple H to L transitions, each of which were followed by a neutron rate peak. We are now going to lower current, 900 kA. |
| Jun 15 2000 03:39:30:157PM | 1000615019 | Catherine Fiore | Shot 19 was at 0.9MA, 4.9 T and ran well. There were multiple H to L transitions, each of which were followed by a neutron rate peak. We are now going to lower current, 800 kA. |
| Jun 15 2000 03:49:52:607PM | 1000615020 | Catherine Fiore | Shot 20 fizzled. |
| Jun 15 2000 04:17:05:560PM | 1000615021 | Catherine Fiore | Shot 21 was 4.9 T, 800 kA and had one extra H to L transition beyond the scheduled ones. Neutron rate is peaking nicely. Next shot will be at 700 kA, same field. |
| Jun 15 2000 04:39:13:590PM | 1000615022 | Catherine Fiore | Shot 22 was 4.9 T, 700 kA and had only the scheduled H to L transitions. Neutron rate peak is apparent but small. Next shot will be at 600 kA, same field. |
| Jun 15 2000 04:54:50:827PM | 1000615023 | Catherine Fiore | Shot 23 disrupted after 0.3s. Steve Wolfe told Bill how to run 600 kA, so we'll make one more try. |
| Jun 15 2000 05:09:54:280PM | 1000615024 | Catherine Fiore | Shot 24 disrupted after 0.6s. |
| Physics Operator Comments | |||
| Jun 15 2000 08:30:01:937AM | Bill Rowan | MP 257 -- ITB control Session leader: C. Fiore Physics operator: B. Rowan Engineering operators: G. Dekow/B. Cochran ------------------------------------------------------------------------------- Engineering setup for Thursday, 1000615: overnight ECDC in D2, stopping 1-2 hours prior to the run. Run begins at 9:00 and ends at 17:00. Power system setup as on 1000523008 Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled fill B-side upper with 10 psi of H Hybrid disable fill C-side with 30 psi of D2 Hybrid enabled J-bottom Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV DNB gate valve should be DISABLED at the start of the run. RF setup: D and E, pulse at 0.6s, 1.5 to 2 MW, drop to .5 MW at 1 s, increase to 1.5 or 2MW at 1.1 s. ------------------------------------------------------------------------------- Run plan: First RF plasma shot, load from 1000523008 (1.0 MA, 5.3 T). The purpose of this experiment is to study the properties of the spontaneous internal transport barrier which forms following the H to L mode transition on Alcator C-Mod. This will start by establishing the experimental technique for forming it consistently particularly in conjunction with the diagnostic set needed to study it, then by using several possible rf injection scenarios to try and control it by prolonging its lifetime. The use of the rf injection for additional heating after formation should also be tested. Since the CXRS system will not be available, we will use HIREX to obtain ion temperature profile data. This will require taking 2 or 3 shots at each condition to obtain sufficient HIREX signal with a data collection window of 20 ms. First, set up a reliable H-mode plasma at 5.3 T, 1 MA, 1.5 to 2 MW rf power, nl_1=1e20. Program rf to drop to .5 MW for 100 ms, then return to the orgiginal value for the duration. The timing of the HIREX data collection window should be set to coordinate with the point that the rf power is cut, so that a pre and post transition ion temperature profile could be obtained. Repeat for as many shots as is needed by John Rice. Repeat with the 0.5MW part of the rf pulse shortened to 50 ms in order to reheat the plasma befire the ITB disipates. Again, take up to 3 shots to get the HIREX data. If these shots have gone well and good progress has been made, repeat at 0.8 MA plasma current, up to 3 shots as needed. RF waveform TBD by performance on first part of the run. Next, lower field to 4.5 T and set up a reliable H-mode plasma, 800 kA, 1.5 to 2 MW rf power, nl_1=1e20. Program rf to drop to .5 MW for 100 ms, then return to the orgiginal value for the duration. Repeat for as many shots as is needed by John Rice. Repeat with the 0.5MW part of the rf pulse shortened to 50 ms in order to reheat the plasma befire the ITB disipates. Again, take up to 3 shots to get the HIREX data. If time permits, repeat the 4.5 T experiment at a different plasma current. If run is going extremely well, set up to ramp the toroidal field from 5.1 T to 4.5 T and try to trigger an H to L transition during the ramp. Resources: 4.1 Machine and Plasma Parameters} Toroidal Field: 5.3 T and 4.5 T Plasma Current: 1. MA to start, 0.8 MA possible. Working gas species: D, H minority Density: about 1e20 on nl_1 4.2 Auxiliary Systems RF Power, pulse length, phasing: 1.5 to 2 MW, drop to 0.5 MW 4.3 Diagnostics Hirex for Ti profiles Visible Bremmstrahlung array. GPC 1 and 2 Neutron diagnostics All standard core diagnostics DNB diagnostics as available Lya arrays | |
| Jun 15 2000 08:32:59:780AM | Bill Rowan | Loaded shot from 1000523008. Load clean Did coldstart | |
| Jun 15 2000 09:24:18:560AM | 1000615001 | Bill Rowan | 001. Loaded shot 1000523008. SL happy with the discharge. The prefill appears low to me at 0.046 mT. For the next shot. Add 1 ms to prefill. At the request of the diagnostician, decreased the argon puff from approx 60 ms to 40 ms. |
| Jun 15 2000 09:36:42:983AM | 1000615002 | Bill Rowan | 002. Good shot. Prefill is approx 0.050 mT |
| Jun 15 2000 09:55:15:217AM | 1000615002 | Bill Rowan | Computer freezes are slowing the run |
| Jun 15 2000 10:12:03:437AM | 1000615003 | Bill Rowan | 003. Good shot No camera. Very disconcerting when there is no camera. |
| Jun 15 2000 10:26:44:780AM | 1000615004 | Bill Rowan | 004. Failure in engineering after entering pulse. |
| Jun 15 2000 10:34:26:123AM | 1000615005 | Bill Rowan | 005. Failure in engineering. Chopper not ready. Backed out of shot. |
| Jun 15 2000 11:03:54:170AM | 1000615006 | Bill Rowan | 006. Plasma. Next shot. No changes |
| Jun 15 2000 11:39:35:293AM | 1000615007 | Bill Rowan | 007. Plasma. Next shot: no changes |
| Jun 15 2000 12:06:05:060PM | 1000615008 | Bill Rowan | 008. Plasma Next shot: no changes |
| Jun 15 2000 12:23:59:560PM | 1000615009 | Bill Rowan | oo9. Plasma Next shot: reduce Ip to 800 kA |
| Jun 15 2000 12:46:56:593PM | 1000615010 | Bill Rowan | 010. Plasma Next shot: reduce BT to 4.5 T |
| Jun 15 2000 01:05:08:700PM | 1000615011 | Bill Rowan | 011. Plasma Next shot: no changes |
| Jun 15 2000 01:19:51:357PM | 1000615012 | Bill Rowan | 012. Plasma Next shot: no changes |
| Jun 15 2000 01:36:39:467PM | 1000615013 | Bill Rowan | 013. Plasma Next shot: change IP to 700 kA |
| Jun 15 2000 02:30:55:890PM | 1000615015 | Bill Rowan | 015. Plasma Next shot: no changes |
| Jun 15 2000 02:31:14:153PM | 1000615016 | Bill Rowan | 016. Plasma Next shot: 1 MA |
| Jun 15 2000 02:55:01:500PM | 1000615017 | Bill Rowan | 017. Plasma Next shot: TF to 4.9 T |
| Jun 15 2000 03:20:37:890PM | 1000615018 | Bill Rowan | 018. Plasma Next shot. Open DNB gate valve so took 2 ms off of the prefill. Now 19 ms long Decrease IP to 0.9MA |
| Jun 15 2000 03:41:26:950PM | 1000615019 | Bill Rowan | 019. Plasma Next shot. Decrease IP to 0.8 MA |
| Jun 15 2000 04:04:15:013PM | 1000615020 | Bill Rowan | 020. Fizzle For next shot: reduced BZ to better match earlier shots DNB gate valve disabled at request of DNB-folk so Increased prefill to 2 ms |
| Jun 15 2000 04:18:43:343PM | 1000615021 | Bill Rowan | 021. Plasma For next shot: Reduced IP to 0.7 MA at request of SL Further reduction in BZ |
| Jun 15 2000 04:40:34:967PM | 1000615022 | Bill Rowan | 022. Plasma For next shot: Reduced IP to 0.6 MA at request of SL Further reduction in BZ |
| Jun 15 2000 05:02:28:450PM | 1000615023 | Bill Rowan | 023. Disruption For next shot: attempted to follow Wolfe's advice and imitate shot 1000523013 with regard to Ip and CLEARIN |
| Jun 15 2000 05:06:49:860PM | 1000615024 | Bill Rowan | 024. Disruption |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:03:54:593AM | Plasma | Ok | |
| 2 | 09:28:51:263AM | Plasma | Ok | |
| 3 | 09:58:14:060AM | Plasma | Ok | |
| 4 | 10:18:26:140AM | Plasma | Bad | Ack Failure |
| 5 | 10:30:51:327AM | Test | Ok | No power test to resynchronize the system |
| 6 | 10:54:06:717AM | Plasma | Ok | |
| 7 | 11:19:50:497AM | Plasma | Ok | |
| 8 | 11:41:00:513AM | Plasma | Ok | |
| 9 | 12:06:40:890PM | Plasma | Ok | |
| 10 | 12:31:40:997PM | Plasma | Ok | |
| 11 | 12:52:00:560PM | Plasma | Ok | |
| 12 | 01:09:33:123PM | Plasma | Ok | |
| 13 | 01:30:06:280PM | Plasma | Ok | |
| 14 | 01:47:18:013PM | Plasma | Ok | |
| 15 | 02:06:38:467PM | Plasma | Ok | |
| 16 | 02:25:14:810PM | Plasma | Ok | |
| 17 | 02:46:40:373PM | Plasma | Ok | |
| 18 | 03:12:56:437PM | Plasma | Ok | |
| 19 | 03:30:17:983PM | Plasma | Ok | |
| 20 | 03:47:44:200PM | Plasma | Ok | |
| 21 | 04:07:55:247PM | Plasma | Ok | |
| 22 | 04:27:48:827PM | Plasma | Ok | |
| 23 | 04:45:29:247PM | Plasma | Ok | |
| 24 | 05:04:26:373PM | Plasma | Ok | |