| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Robert Granetz,T. Sunn Pederson |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Unknown |
| Engineering Operator Run Comment |
| RF conditioning |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:25:413PM |
| Author: To Be Determined |
| Physics operator summary for run 1001115: MP #268 RF conditioning MP #236 H-mode pedestal asymmetry with reversed field Session leader: R. Granetz/T. Sunn Pedersen Physics operator: R. Granetz Summary: This was a moderately successful run as far as physics goes. We got a number of 0.8 MA discharges with H-modes in reversed field. The threshold ICRF power was about 2.2 MW. The primary result was that the locations of the top and outboard x-ray pedestals were the SAME with reversed field as they are with normal field. So the first goal of this MP has been accomplished. The up/down argon asymmetry, on the other hand, is reversed from the normal field case. The remainder of the MP, which involved making the same measurements at 1.0 and 1.2 MA, was not accomplished and will have to be rescheduled. The RF performance was excellent, with many long steady pulses (0.9 s) at 2-3 MW. All three antennas were running simultaneously, although E-port was at reduced power compared to D and J4. ECDC in D2 was done between shots and generally kept the H/D ratio at 5-7%. Startup was not any more reliable than during the preceding weeks, and computer problems caused a long delay late in the day. Scorecard: 10 plasmas 5 fizzles 2 duds 1 test 2 aborted and/or screwed up by computers ---------- 20 total ------------------------------------------------------------------------------- Engineering setup and run plan for Wednesday 15 Nov 2000. MP #268 RF conditioning MP #236 H-mode pedestal asymmetry with reversed field Session leader: Granetz/Pedersen Physics operator: Granetz ECDC in D2 overnight, ending 2 hours before the run. Run starts at 09:00 and ends at 17:00. Power systems as on 1001107020. Gas setup fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 35 psi of D2 Hybrid DISABLED, for ECDC fill C-side with 30 psi of D2 Hybrid enabled leave J-bot as is Hybrid DISABLED We would like the following gate valves should be enabled: ECE, VUV, Beast ------------------------------------------------------------------------------- Run Plan: Start with 0.8 MA, lower null plasma. We probably need at least 2.5 MW of ICRF for >200 ms. Ideally we'd like 3+ MW for 0.5 s, but we'll take what we can get. Assuming we do indeed get H-modes with reversed field, we would then try it at 1.0 MA, and then at 1.2 MA. Argon puffing will also be required for JR to get up/down argon profiles. I'll load segment 1 from 1001109022 (last shot from last week), segment 2 from 1001107020, and segment 3 from 1001109022, except I'll set the density to in segment 2 to nl_04=0.7e20 m-2 and in segment 3 to nl_04=1.0e20 m-2. ------------------------------------------------------------------------------- Overnight ECDC in D2. Hybrid coldstart done; no errors found Loaded segments and made modifications as listed above. EFC turn-on time had to be changed again from t=-30 ms to t=-40 ms. ------------------------------------------------------------------------------- ECDC in D2 will be done between some shots today. Shot 01 -- Test of camac, computers, and shot cycle. All OK. Shot 02 -- Fizzle. Next shot: change IC_EF4 from +1335 to +1320 A. Shot 03 -- Plasma. Good shot. Ip=0.84 MA, Bt=5.2 T, nl_04=0.7e20 m-2. Prf=1.07 MW from t=0.6 to 1.5 s. (0.5 MW from each of D and J4). Next shot: repeat Shot 04 -- Fizzle. Late breakdown. Next shot: tweak Br0 and pre-fill gas puff. ECDC in D2 done between shots. Shot 05 -- Plasma. Good shot. Prf=1.6 MW (D,E,J4=0.5,0.5,0.6 MW), t=0.6-1.5 s, no faults. Breakdown looks a little better. H/D=2.5% from CX, 5% from spectroscopy. Thomson scattering is having some control problems. No ECDC after this shot. Shot 06 -- Plasma. Disrupted at t=1.40 s. Prf=0.6+0.6+0.7=1.9 MW. Disruption was due to a big injection, but views of D and J show nothing. Heating looks pretty good. Startup was terrible. H/D=5% (CX). Next shot: suggestion from Steve W: lower RCUR derivative gain in segment 1 between t=0.010-0.030 s from 6 to 3. Raise power on D and J4. Leave E as is. Turn on argon. ECDC in D2 done after this shot. Shot 07 -- Plasma. Disrupted at t=1.31 s. Prf=0.7+0.6+0.85=2.15 MW. Killed by a big injection. There was another big injection at t=0.95 s. Max Te0=4.0 keV. H/D=4.0% (CX). Still no H-modes. Good startup. Next shot: no PCS changes, no RF changes. DNB gate valve will open on the next shot, but with no gas. ECDC in D2 done after this shot. Shot 08 -- Plasma. Good shot. H-mode!!! Prf=0.7+0.6+0.85=2.15 MW (same as previous shot). Huge core and edge x-ray signals. Wth=125 kJ. From the impurity accumulation, it looks ELMfree. Top and outboard pedestals are narrow, but the fit on the outboard pedestal looks strange. Raw edge x-ray data is good. Top pedestal position is about 5 mm inside of separatrix, outboard is 10-12 mm inside. Next shot: raise D and J4 by another 100 kW each. Increase argon puff from 30 to 40 ms. ECDC in D2 done after this shot. Shot 09 -- Plasma. Disrupted at t=1.40 s. No H-modes. Prf=2.35 MW, no faults Why no H-mode? Same ne, Ip, Bt. H/D=6% (CX), same as preceding shot. Next shot: raise D and J4 power some more. ECDC in D2 done after this shot. Shot 10 -- Fizzle. Next shot: tweak Br0 and pre-fill gas puff. No ECDC after this shot. Shot 11 -- Dud. No obvious reason why. Next shot: tweak pre-fill gas puff. No ECDC after this shot. Shot 12 -- Plasma. Good shot. Multiple H-modes. Prf=2.6 MW. Same pedestal positions as on shot 8, namely 4-5 mm inside for top array, and 10-11 mm for outboard array. H/D=7% (CX). Next shot: decrease outer gap by 4 mm so the outer array sees more of the pedestal. RF may need some re-tuning. Turn on high frequency sampling window on xtomo for t=1.00 to 1.15 s. ECDC in D2 done after this shot. Shot 13 -- Plasma. Good shot. One H-mode (ELMfree, I think). Prf=2.4-2.5 MW. Outer array had better view of pedestal, but outer gap is still 13 mm. H/D=6-7% (Balmer). Same x-ray pedestal positions (top: 3-5 mm, outboard: 10-12 mm). Next shot: decrease outer gap another 2 mm (increase RCUR by 1 mm). Move HIREX chord 1. ECDC in D2 done after this shot. Shot 14 -- Plasma. Good shot. One H-mode. Prf=3.0 MW, then 2.5 MW. Might be some Type-I ELMs from t=0.8-1.0 s. Outer gap=12 mm. H/D=4-6%. Next shot: raise Ip to 1.0 MA. Move fast XTOMO window to t=0.90-1.15 s. ECDC in D2 done after this shot. Shot 15 -- Dud. Inexplicable. I (and Earl) heard a funny sound in the power room. Next shot: try again for 1 MA. No changes. ECDC in D2 done after this shot. Shot 16 -- Plasma. Good shot. 1 MA, but no H-modes. Seems to be a lot of outgassing during the RF pulse. Prf=2.9-3.0 MW from t=0.6-1.5 s. H/D=7%. John Rice reports that the argon up/down asymmetry has switched sign compared to normal field direction. Next shot: repeat, trying to degas the antennas. ECDC in D2 done after this shot. Shot 17 -- Fizzle. Next shot: pre-fill tweak. Shot 18 -- Aborted (no-power shot cycle) because the INIT state hung up. Long delay while Josh works on the computer problems. Shot 19 -- Aborted (no-power shot cycle) due to EFC problem. Shot 20 -- Fizzle. End of run. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:12:660PM |
| Author: To Be Determined |
| Physics operator summary for run 1001115: MP #268 RF conditioning MP #236 H-mode pedestal asymmetry with reversed field Session leader: R. Granetz/T. Sunn Pedersen Physics operator: R. Granetz Summary: This was a moderately successful run as far as physics goes. We got a number of 0.8 MA discharges with H-modes in reversed field. The threshold ICRF power was about 2.2 MW. The primary result was that the locations of the top and outboard x-ray pedestals were the SAME with reversed field as they are with normal field. So the first goal of this MP has been accomplished. The up/down argon asymmetry, on the other hand, is reversed from the normal field case. The remainder of the MP, which involved making the same measurements at 1.0 and 1.2 MA, was not accomplished and will have to be rescheduled. The RF performance was excellent, with many long steady pulses (0.9 s) at 2-3 MW. All three antennas were running simultaneously, although E-port was at reduced power compared to D and J4. ECDC in D2 was done between shots and generally kept the H/D ratio at 5-7%. Startup was not any more reliable than during the preceding weeks, and computer problems caused a long delay late in the day. Scorecard: 10 plasmas 5 fizzles 2 duds 1 test 2 aborted and/or screwed up by computers ---------- 20 total ------------------------------------------------------------------------------- Engineering setup and run plan for Wednesday 15 Nov 2000. MP #268 RF conditioning MP #236 H-mode pedestal asymmetry with reversed field Session leader: Granetz/Pedersen Physics operator: Granetz ECDC in D2 overnight, ending 2 hours before the run. Run starts at 09:00 and ends at 17:00. Power systems as on 1001107020. Gas setup fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 35 psi of D2 Hybrid DISABLED, for ECDC fill C-side with 30 psi of D2 Hybrid enabled leave J-bot as is Hybrid DISABLED We would like the following gate valves should be enabled: ECE, VUV, Beast ------------------------------------------------------------------------------- Run Plan: Start with 0.8 MA, lower null plasma. We probably need at least 2.5 MW of ICRF for >200 ms. Ideally we'd like 3+ MW for 0.5 s, but we'll take what we can get. Assuming we do indeed get H-modes with reversed field, we would then try it at 1.0 MA, and then at 1.2 MA. Argon puffing will also be required for JR to get up/down argon profiles. I'll load segment 1 from 1001109022 (last shot from last week), segment 2 from 1001107020, and segment 3 from 1001109022, except I'll set the density to in segment 2 to nl_04=0.7e20 m-2 and in segment 3 to nl_04=1.0e20 m-2. ------------------------------------------------------------------------------- Overnight ECDC in D2. Hybrid coldstart done; no errors found Loaded segments and made modifications as listed above. EFC turn-on time had to be changed again from t=-30 ms to t=-40 ms. ------------------------------------------------------------------------------- ECDC in D2 will be done between some shots today. Shot 01 -- Test of camac, computers, and shot cycle. All OK. Shot 02 -- Fizzle. Next shot: change IC_EF4 from +1335 to +1320 A. Shot 03 -- Plasma. Good shot. Ip=0.84 MA, Bt=5.2 T, nl_04=0.7e20 m-2. Prf=1.07 MW from t=0.6 to 1.5 s. (0.5 MW from each of D and J4). Next shot: repeat Shot 04 -- Fizzle. Late breakdown. Next shot: tweak Br0 and pre-fill gas puff. ECDC in D2 done between shots. Shot 05 -- Plasma. Good shot. Prf=1.6 MW (D,E,J4=0.5,0.5,0.6 MW), t=0.6-1.5 s, no faults. Breakdown looks a little better. H/D=2.5% from CX, 5% from spectroscopy. Thomson scattering is having some control problems. No ECDC after this shot. Shot 06 -- Plasma. Disrupted at t=1.40 s. Prf=0.6+0.6+0.7=1.9 MW. Disruption was due to a big injection, but views of D and J show nothing. Heating looks pretty good. Startup was terrible. H/D=5% (CX). Next shot: suggestion from Steve W: lower RCUR derivative gain in segment 1 between t=0.010-0.030 s from 6 to 3. Raise power on D and J4. Leave E as is. Turn on argon. ECDC in D2 done after this shot. Shot 07 -- Plasma. Disrupted at t=1.31 s. Prf=0.7+0.6+0.85=2.15 MW. Killed by a big injection. There was another big injection at t=0.95 s. Max Te0=4.0 keV. H/D=4.0% (CX). Still no H-modes. Good startup. Next shot: no PCS changes, no RF changes. DNB gate valve will open on the next shot, but with no gas. ECDC in D2 done after this shot. Shot 08 -- Plasma. Good shot. H-mode!!! Prf=0.7+0.6+0.85=2.15 MW (same as previous shot). Huge core and edge x-ray signals. Wth=125 kJ. From the impurity accumulation, it looks ELMfree. Top and outboard pedestals are narrow, but the fit on the outboard pedestal looks strange. Raw edge x-ray data is good. Top pedestal position is about 5 mm inside of separatrix, outboard is 10-12 mm inside. Next shot: raise D and J4 by another 100 kW each. Increase argon puff from 30 to 40 ms. ECDC in D2 done after this shot. Shot 09 -- Plasma. Disrupted at t=1.40 s. No H-modes. Prf=2.35 MW, no faults Why no H-mode? Same ne, Ip, Bt. H/D=6% (CX), same as preceding shot. Next shot: raise D and J4 power some more. ECDC in D2 done after this shot. Shot 10 -- Fizzle. Next shot: tweak Br0 and pre-fill gas puff. No ECDC after this shot. Shot 11 -- Dud. No obvious reason why. Next shot: tweak pre-fill gas puff. No ECDC after this shot. Shot 12 -- Plasma. Good shot. Multiple H-modes. Prf=2.6 MW. Same pedestal positions as on shot 8, namely 4-5 mm inside for top array, and 10-11 mm for outboard array. H/D=7% (CX). Next shot: decrease outer gap by 4 mm so the outer array sees more of the pedestal. RF may need some re-tuning. Turn on high frequency sampling window on xtomo for t=1.00 to 1.15 s. ECDC in D2 done after this shot. Shot 13 -- Plasma. Good shot. One H-mode (ELMfree, I think). Prf=2.4-2.5 MW. Outer array had better view of pedestal, but outer gap is still 13 mm. H/D=6-7% (Balmer). Same x-ray pedestal positions (top: 3-5 mm, outboard: 10-12 mm). Next shot: decrease outer gap another 2 mm (increase RCUR by 1 mm). Move HIREX chord 1. ECDC in D2 done after this shot. Shot 14 -- Plasma. Good shot. One H-mode. Prf=3.0 MW, then 2.5 MW. Might be some Type-I ELMs from t=0.8-1.0 s. Outer gap=12 mm. H/D=4-6%. Next shot: raise Ip to 1.0 MA. Move fast XTOMO window to t=0.90-1.15 s. ECDC in D2 done after this shot. Shot 15 -- Dud. Inexplicable. I (and Earl) heard a funny sound in the power room. Next shot: try again for 1 MA. No changes. ECDC in D2 done after this shot. Shot 16 -- Plasma. Good shot. 1 MA, but no H-modes. Seems to be a lot of outgassing during the RF pulse. Prf=2.9-3.0 MW from t=0.6-1.5 s. H/D=7%. John Rice reports that the argon up/down asymmetry has switched sign compared to normal field direction. Next shot: repeat, trying to degas the antennas. ECDC in D2 done after this shot. Shot 17 -- Fizzle. Next shot: pre-fill tweak. Shot 18 -- Aborted (no-power shot cycle) because the INIT state hung up. Long delay while Josh works on the computer problems. Shot 19 -- Aborted (no-power shot cycle) due to EFC problem. Shot 20 -- Fizzle. End of run. |
| Session Leader Comments | |||
| Nov 15 2000 11:56:16:310AM | 1001115008 | Robert Granetz | Shot 08 -- Plasma. Good shot. H-mode!!! Prf=0.7+0.6+0.85=2.15 MW (same as previous shot). Huge core and edge x-ray signals. Wth=125 kJ. From the impurity accumulation, it looks ELMfree. Top and outboard pedestals are narrow, but the fit on the outboard pedestal looks strange. Raw edge x-ray data is good. Top pedestal position is about 5 mm inside of separatrix, outboard is 10-12 mm inside. Next shot: raise D and J4 by another 100 kW each. Increase argon puff from 30 to 40 ms. ECDC in D2 done after this shot. |
| Nov 15 2000 12:07:15:623PM | 1001115008 | Robert Granetz | Outboard edge array may be missing some of the pedestal. |
| Nov 15 2000 12:47:30:187PM | 1001115008 | Robert Granetz | From Thomas: From: RHONE::SUNN To: GRANETZ CC: Subj: shot 8 Here's my interpretation of what happens on shot 8: At .89 sec, for whatever reason, the plasma changes its shape a bit and the pedestal (and the separatrix?) moves inward by about 2 mm, which makes it leave the view of chords 3-7 of the outboard array. Hence, the widths and locations of the outboard pedestal are suspect after t=0.89 sec. The inward shift of about 2 mm is seen on the top array. When the pedestal is well diagnosed, the difference between the pedestal locations is 5-8 mm. Although the sign did not change, this is less of an asymmetry than what we usually see in H-mode at high edge q (11.5 mm or so) but it's within the scatter of the normal field data. I suggest 1. Change the equilibrium so we can see the pedestal - why is the separatrix so far in? 2. We need several shots for each current to get an estimate of st. dev. and reproducibility - I suppose John Rice needs that anyway 3. If possible, an H-mode at even lower current, say .7 MA, would be great to help determine the scaling, but I'd go for the 1.0 and 1.2 MA shots first Th. |
| Nov 15 2000 12:48:07:047PM | 1001115008 | Robert Granetz | The RF guys don't want me to change the outer gap. But if we continue to get this inward jump, I may have to overule them. |
| Nov 15 2000 12:19:40:030PM | 1001115009 | Robert Granetz | Thomas's comment: Maybe the reason we didn't get H-mode is due to the extra argon. (He's logged in remotely but can't get the IDL X-windows interface to the logbook to work.) |
| Nov 15 2000 01:01:13:560PM | 1001115009 | Robert Granetz | From Thomas: From: RHONE::SUNN To: GRANETZ CC: Subj: for the logbook Shot 9 may be a good shot to look at L-mode in reversed field. The automatic pedestal fitting routine seems to have a little bit of information in it, despite the fact that the shot remains in L-mode. |
| Nov 15 2000 01:14:15:593PM | 1001115012 | Robert Granetz | From Thomas: From: RHONE::SUNN To: GRANETZ CC: Subj: shot 12 The difference in pedestal position is again 6-8 mm for both H-modes. MAIL> |
| Nov 15 2000 01:16:25:310PM | 1001115012 | Robert Granetz | Shot 12 -- Plasma. Good shot. Multiple H-modes. Prf=2.6 MW. Same pedestal positions as on shot 8, namely 4-5 mm inside for top array, and 10-11 mm for outboard array. H/D=7% (CX). Next shot: decrease outer gap by 4 mm so the outer array sees more of the pedestal. RF may need some re-tuning. Turn on high frequency sampling window on xtomo for t=1.00 to 1.15 s. ECDC in D2 done after this shot. |
| Nov 15 2000 01:41:56:890PM | 1001115013 | Robert Granetz | Shot 13 -- Plasma. Good shot. One H-mode (ELMfree, I think). Prf=2.4-2.5 MW. Outer array had better view of pedestal, but outer gap is still 13 mm. H/D=6-7% (Balmer). Same x-ray pedestal positions (top: 3-5 mm, outboard: 10-12 mm). Next shot: decrease outer gap another 2 mm (increase RCUR by 1 mm). Move HIREX chord 1. ECDC in D2 done after this shot. |
| Nov 15 2000 02:18:08:310PM | 1001115014 | Robert Granetz | Shot 14 -- Plasma. Good shot. One H-mode. Prf=3.0 MW, then 2.5 MW. Might be some Type-I ELMs from t=0.8-1.0 s. Outer gap=12 mm. H/D=4-6%. Next shot: raise Ip to 1.0 MA. Move fast XTOMO window to t=0.90-1.15 s. ECDC in D2 done after this shot. |
| Nov 15 2000 02:40:15:030PM | 1001115014 | Robert Granetz | From: RHONE::SUNN To: GRANETZ CC: Subj: On shot 14, the pedestal asymmetry was similar to that of the other shots. (should be remarked in the logbook, I suppose) MAIL> |
| Nov 15 2000 02:55:56:310PM | 1001115016 | Robert Granetz | Shot 16 -- Plasma. Good shot. 1 MA, but no H-modes. Seems to be a lot of outgassing during the RF pulse. Prf=2.9-3.0 MW from t=0.6-1.5 s. H/D=7%. John Rice reports that the argon up/down asymmetry has switched sign compared to normal field direction. Next shot: repeat, trying to degas the antennas. ECDC in D2 done after this shot. |
| Physics Operator Comments | |||
| Nov 15 2000 08:44:27:980AM | Robert Granetz | Engineering setup and run plan for Wednesday 15 Nov 2000. MP #268 RF conditioning MP #236 H-mode pedestal asymmetry with reversed field Session leader: Granetz/Pedersen Physics operator: Granetz ECDC in D2 overnight, ending 2 hours before the run. Run starts at 09:00 and ends at 17:00. Power systems as on 1001107020. Gas setup fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 35 psi of D2 Hybrid DISABLED, for ECDC fill C-side with 30 psi of D2 Hybrid enabled leave J-bot as is Hybrid DISABLED We would like the following gate valves should be enabled: ECE, VUV, Beast | |
| Nov 15 2000 08:44:43:183AM | Robert Granetz | Run Plan: Start with 0.8 MA, lower null plasma. We probably need at least 2.5 MW of ICRF for >200 ms. Ideally we'd like 3+ MW for 0.5 s, but we'll take what we can get. Assuming we do indeed get H-modes with reversed field, we would then try it at 1.0 MA, and then at 1.2 MA. Argon puffing will also be required for JR to get up/down argon profiles. I'll load segment 1 from 1001109022 (last shot from last week), segment 2 from 1001107020, and segment 3 from 1001109022, except I'll set the density to in segment 2 to nl_04=0.7e20 m-2 and in segment 3 to nl_04=1.0e20 m-2. | |
| Nov 15 2000 08:57:42:513AM | Robert Granetz | Overnight ECDC in D2. Hybrid coldstart done; no errors found Loaded segments and made modifications as listed above. EFC turn-on time had to be changed again from t=-30 ms to t=-40 ms. | |
| Nov 15 2000 08:50:41:607AM | 1001115001 | Robert Granetz | Shot 01 -- Test of camac, computers, and shot cycle. All OK. |
| Nov 15 2000 09:20:09:547AM | 1001115002 | Robert Granetz | Shot 02 -- Fizzle. Next shot: change IC_EF4 from +1335 to +1320 A. |
| Nov 15 2000 09:44:28:500AM | 1001115003 | Robert Granetz | Shot 03 -- Plasma. Good shot. Ip=0.84 MA, Bt=5.2 T, nl_04=0.7e20 m-2. Prf=1.07 MW from t=0.6 to 1.5 s. (0.5 MW from each of D and J4). Next shot: repeat |
| Nov 15 2000 10:11:51:890AM | 1001115004 | Robert Granetz | Shot 04 -- Fizzle. Late breakdown. Next shot: tweak Br0 and pre-fill gas puff. ECDC in D2 done between shots. |
| Nov 15 2000 10:25:29:343AM | 1001115005 | Robert Granetz | Shot 05 -- Plasma. Good shot. Prf=1.6 MW (D,E,J4=0.5,0.5,0.6 MW), t=0.6-1.5 s, no faults. Breakdown looks a little better. H/D=2.5% from CX, 5% from spectroscopy. Thomson scattering is having some control problems. No ECDC after this shot. |
| Nov 15 2000 10:50:16:280AM | 1001115006 | Robert Granetz | Shot 06 -- Plasma. Disrupted at t=1.40 s. Prf=0.6+0.6+0.7=1.9 MW. Disruption was due to a big injection, but views of D and J show nothing. Heating looks pretty good. Startup was terrible. H/D=5% (CX). Next shot: suggestion from Steve W: lower RCUR derivative gain in segment 1 between t=0.010-0.030 s from 6 to 3. Raise power on D and J4. Leave E as is. Turn on argon. ECDC in D2 done after this shot. |
| Nov 15 2000 11:08:51:810AM | 1001115007 | Robert Granetz | Shot 07 -- Plasma. Disrupted at t=1.31 s. Prf=0.7+0.6+0.85=2.15 MW. Killed by a big injection. There was another big injection at t=0.95 s. Max Te0=4.0 keV. H/D=4.0% (CX). Still no H-modes. Good startup. Next shot: no PCS changes, no RF changes. DNB gate valve will open on the next shot, but with no gas. ECDC in D2 done after this shot. |
| Nov 15 2000 11:40:11:843AM | 1001115008 | Robert Granetz | Shot 08 -- Plasma. Good shot. H-mode!!! Prf=0.7+0.6+0.85=2.15 MW (same as previous shot). Huge core and edge x-ray signals. Wth=125 kJ. From the impurity accumulation, it looks ELMfree. Top and outboard pedestals are narrow, but the fit on the outboard pedestal looks strange. Raw edge x-ray data is good. Top pedestal position is about 5 mm inside of separatrix. Next shot: raise D and J4 by another 100 kW each. Increase argon puff from 30 to 40 ms. ECDC in D2 done after this shot. |
| Nov 15 2000 12:06:56:810PM | 1001115008 | Robert Granetz | Outboard edge array may be missing some of the pedestal. |
| Nov 15 2000 11:55:39:013AM | 1001115009 | Robert Granetz | Shot 09 -- Plasma. Disrupted at t=1.40 s. No H-modes. Prf=2.35 MW, no faults Why no H-mode? Same ne, Ip, Bt. H/D=6% (CX), same as preceding shot. Next shot: raise D and J4 power some more. ECDC in D2 done after this shot. |
| Nov 15 2000 12:25:09:357PM | 1001115010 | Robert Granetz | Shot 10 -- Fizzle. Next shot: tweak Br0 and pre-fill gas puff. |
| Nov 15 2000 12:40:42:000PM | 1001115011 | Robert Granetz | Shot 11 -- Dud. No obvious reason why. Next shot: tweak pre-fill gas puff. No ECDC after this shot. |
| Nov 15 2000 01:12:46:670PM | 1001115012 | Robert Granetz | Shot 12 -- Plasma. Good shot. Multiple H-modes. Prf=2.6 MW. Same pedestal positions as on shot 8, namely 4-5 mm inside for top array, and 10-11 mm for outboard array. Next shot: decrease outer gap by 4 mm so the outer array sees more of the pedestal. RF may need some re-tuning. Turn on high frequency sampling window on xtomo for t=1.00 to 1.15 s. ECDC in D2 done after this shot. |
| Nov 15 2000 01:41:49:780PM | 1001115013 | Robert Granetz | Shot 13 -- Plasma. Good shot. One H-mode (ELMfree, I think). Prf=2.4-2.5 MW. Outer array had better view of pedestal, but outer gap is still 13 mm. H/D=6-7% (Balmer). Same x-ray pedestal positions (top: 3-5 mm, outboard: 10-12 mm). Next shot: decrease outer gap another 2 mm (increase RCUR by 1 mm). Move HIREX chord 1. ECDC in D2 done after this shot. |
| Nov 15 2000 02:07:36:670PM | 1001115014 | Robert Granetz | Shot 14 -- Plasma. Good shot. One H-mode. Prf=3.0 MW, then 2.5 MW. Might be some Type-I ELMs from t=0.8-1.0 s. Outer gap=12 mm. H/D=4-6%. Next shot: raise Ip to 1.0 MA. Move fast XTOMO window to t=0.90-1.15 s. ECDC in D2 done after this shot. |
| Nov 15 2000 02:17:11:547PM | 1001115014 | Robert Granetz | From: RHONE::SUNN To: GRANETZ CC: Subj: for the logbook Looks like there are several giant ELMs on shot 14, cutting the x-ray emissivity way down on the innermost channels and spiking it up on the outer channels all the way to channel 37 (most dramatic on array 4) We should move the fast window to see them MAIL> |
| Nov 15 2000 02:20:44:390PM | 1001115015 | Robert Granetz | Shot 15 -- Dud. Inexplicable. I (and Earl) heard a funny sound in the power room. Next shot: try again for 1 MA. No changes. |
| Nov 15 2000 02:55:48:437PM | 1001115016 | Robert Granetz | Shot 16 -- Plasma. Good shot. 1 MA, but no H-modes. Seems to be a lot of outgassing during the RF pulse. Prf=2.9-3.0 MW from t=0.6-1.5 s. H/D=7%. John Rice reports that the argon up/down asymmetry has switched sign compared to normal field direction. Next shot: repeat, trying to degas the antennas. ECDC in D2 done after this shot. |
| Nov 15 2000 03:14:25:920PM | 1001115017 | Robert Granetz | Shot 17 -- Fizzle. Next shot: pre-fill tweak. |
| Nov 15 2000 03:37:22:733PM | 1001115017 | Robert Granetz | Shot 18 -- Aborted (no-power shot cycle) because the INIT state hung up. |
| Nov 15 2000 04:04:23:343PM | 1001115018 | Robert Granetz | Long delay while Josh works on the computer problems. |
| Nov 15 2000 04:56:08:827PM | 1001115019 | Robert Granetz | Shot 19 -- Aborted (no-power shot cycle) due to EFC problem. |
| Nov 15 2000 05:08:55:763PM | 1001115020 | Robert Granetz | Shot 20 -- Fizzle. End of run. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:00:24:810AM | Test | Ok | no power shot to test computers |
| 2 | 09:13:15:750AM | Plasma | Ok | |
| 3 | 09:31:44:890AM | Plasma | Ok | |
| 4 | 09:46:29:750AM | Plasma | Ok | |
| 5 | 10:13:05:530AM | Plasma | Ok | |
| 6 | 10:27:50:233AM | Plasma | Ok | |
| 7 | 10:55:51:530AM | Plasma | Ok | |
| 8 | 11:21:08:297AM | Plasma | Ok | |
| 9 | 11:45:14:843AM | Plasma | Ok | |
| 10 | 12:09:58:590PM | Plasma | Ok | |
| 11 | 12:31:01:310PM | Plasma | Ok | |
| 12 | 12:51:53:640PM | Plasma | Ok | |
| 13 | 01:18:23:467PM | Plasma | Ok | |
| 14 | 01:45:44:060PM | Plasma | Ok | |
| 15 | 02:10:24:840PM | Plasma | Ok | |
| 16 | 02:39:44:950PM | Plasma | Ok | |
| 17 | 03:03:47:403PM | Plasma | Ok | |
| 18 | 03:39:40:403PM | Plasma | Bad | Camac Problems |
| 19 | 04:52:51:640PM | Plasma | Bad | Chopper was not ready |
| 20 | 05:06:42:843PM | Plasma | Ok | |