| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | John Goetz |
| Physics operator(s): | Dmitri Mossessian |
| Engineering operator(s): | Bill Cochran,Bill Byford |
| Engineering Operator Run Comment |
| MP 268 ICRF Conditioning. Goetz/Mossessian/Cochran/Byford. |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:24:757PM |
| Author: To Be Determined |
| Engineering setup for 1000906: 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 1000901025 (0.8 MA, 5.2 T, inner-wall limited) Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled B-side upper should be set up for between-shot ECDC in D2 leave B-side upper as is Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV DNB gate valve will be DISABLED today, at least for the beginning of the run. ------------------------------------------------------------------------------- Run plan for 1000906: MP 268 -- ICRF Conditioning Go back to the 0.8 MA inner-wall limited discharges from Friday and continue to condition J-port. ------------------------------------------------------------------------------- 001 OH test 002 dud 003 plasma D: 0.6 MW E: 0.6 MW J: 0.6 MW phase was off because we changed the reference next shot: change the phase of J-port by 0.5 004 plasma D: 0.6 MW E: 0.6 MW J: 0.6 MW phase was off wrapped the other direction [0,1,3/4,-.25] next shot: change the phase of J-port by 0.5 005 plasma - early disruption 1.06 D: 0.6 MW E: 0.6 MW J: 0.6 MW phase improved [0,1,0.1,1.1] next shot: change the phase of J-port by 0.1 pi decrease density by 10% hopefully to avoid marfe 006 plasma D: 0.6 MW E: 0.6 MW J: 0.6 MW good comparison shot except J-port evolves significant gas next shot: shorten the pulse to 100 msec and increase the power by 200 kW overlap D and E in the back of the pulse 007 plasma D: 0.8 MW E: 0.8 MW J: 0.8 MW marfe again next shot: turn off ninja 008 plasma D: 0.8 MW E: 0.8 MW J: 0.8 MW good comparison shot J is significantly less than D and E in stored energy next shot: 1 MW each 009 dud 010 fizzle 011 fizzle 012 plasma D: 1 MW E: 1 MW J: 1 MW J3: 1 MW with two faults - glow from corner J4: 1 MW with two faults - glow from corner good comparison shot poor heating effectiveness from J3 and J4 alone 013 plasma D: 1.2 MW E: 1.2 MW J: 1.2 MW - beginning to see glow from corners J3: 1 MW with multiple faults - glow from corner J4: 1 MW - glow from corner good comparison shot poor heating effectiveness from J3 and J4 alone next shot: increase to 1.5 MW each overlap D and E in the latter part of pulse -> 3 MW 014 fizzle 015 plasma D: 1.5 MW E: 1.5 MW J: 1.5 MW good comparison shot D and E - 3 MW with some H-modes? limited? next shot: lengthen J-port to 0.5 msec 016 plasma D: 1.5 MW E: 1.5 MW J: 1.5 MW good comparison shot D and J - 3 MW with some H-modes? limited? 250 msec before corners heated up next shot: D-port to 0.6 sec 017 plasma - early disruption D: 1.3 MW E: 1.3 MW J: 1.5 MW 200 msec before corners overheat next shot: go diverted 018 plasma D: 1.25 MW max faults after 1.1 sec E: 1.25 MW J: 1.5 MW with H-modes with faults next shot: raise field to 5.5 T and reduce power to 1.05 019 plasma EDA D: 1.05 MW single fault E: 1.25 MW J: 1.5 MW with H-modes with faults next shot: raise field to 5.9 T 020 plasma EDA D: 1.05 MW single fault E: 1.25 MW single fault J: 1.5 MW with H-modes with faults BT~5.8 T next shot: raise field to 6.0 T 021 abort and test shot for the alternator 022 alternator test shot 023 plasma EDA D: 1.05 MW single fault E: 1.25 MW no faults J: 1.5 MW with no H-modes with faults; lots of injections BT~6.05 Summary: We continued to investigate the operational characteristics of J-port antenna. With short pulses, we had several comparison discharges at various power levels (up to 1.5 MW). In terms of the impurity injections, the performance improved compared to last friday. We obtained ~0.25 sec pulses at 1.5 MW before injections from the corners occurred. These injections are largely N and Ti (Terry). The improvement may be a result of conditioning; however, the rate of improvement is quite slow. More importantly the heating efficiency is still lower for J than D and E antennas. From 1000906012 and 015, J-port heating efficiency was ~50% versus ~75% for D and E-port. This heating efficiency is little better than those measured in June. We were able to operate D and E-port antennas at fields up to 6.05 T reliably in diverted, H-mode plasmas. Before the run we had installed notch filters to remove cross coupled power from the arc detectors. No density barrier was observed as is the case for 4.5 T operation. In the case of the 6 T discharge, the H cyclotron resonance is on the low field side, ~10 cm from the plasma center. For 4.5 T, the H cyclotron resonance is on the high field side, ~10 cm from the plasma center. We injected a maximum of 3 MW into inner wall limited plasmas and obtained short lived H-modes. To summarize the ICRF operational status, the D and E-port antennas are operational. These systems still have a few measurement problems that we will be sorting out in the coming weeks. The primary issue is the power measurements. The power measurements are not consistent for D-port when comparing all the directional couplers and E-port may be systematicly reporting ~20% high at the FPA output (used for feedback and net power). We are currently installing calibrated and more reliable power meters in an effort to obtain reliable power measurements. J-port as a four-strap antenna is not ready for physics experiments. It has lower heating efficiency and an impurity generation problem. Switching to a 2-strap antenna will occur over the next few days. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:11:927PM |
| Author: To Be Determined |
| Physop summary for 1000906: MP268 - ICRF conditioning Plan was: Do 0.8 MA inner wal limited discharges and continue conditioning. Summary: Not a bad day from PO point of view. Machine ran reasonably well, we had nice limited plasmas. It turned out that the density was affected significantly by the He puff (fluctuations imaging thing) and we couldn't get below 9e19 m^-2 target untill we turned the puff off. After shot 8 alternator was slowed down which resulted in minor changes in OH voltages. A dud followed, and then alternating plasmas/fizzles, until the OH1 and OH2 voltages were adjusted to compensate for the change ( after shot 14). We turned to diverted plasmas after shot 17. Nice EDA H-modes were obtained at Bt =5.2 ,5.45 and 5.8 T. Alternator lost its excitation voltage on shot 21. After couple of test shots, it was decided that slowing down the alternator is what caused the problem. The alternator was sped up to 1645 RPM, and the next test was succesful. The last shot 23 was a good 6.05T, 0.8 MA shot with 2.3 MW RF and two EDAs 23 shots 1 dud 3 fizzles 4 tests 15 plasmas ---------------------------------------------------------------------------- 1000906xxx mossessian PHYSICS_OPERATOR Sep 6 2000 9:02:01:590AM . . . . . . . . . . . . . . . . . . . . Engineering setup for 1000906: 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 1000901025 (0.8 MA, 5.2 T, inner-wall limited) Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled leave B-side upper as is Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV DNB gate valve will be DISABLED today, at least for the beginning of the run. ____________________________________________________ 8:50 Loaded 1000901025. Coldstart OK First shot will be OH test ---------------------------------------------------------------------------- 1000906001 OH test OK Next shot: Plasma ----------------------------------------------------------------------------- 1000906002 EF1_upper power supply problem. ----------------------------------------------------------------------------- 1000906003 Plasma. H/D ratio is about 3%. We are not going to do ECDC between shots unless it gets to above 5%. Plasma is not limited (according to EFIT) between .56 and 1 sec. For next shot: drop CLEARIN more to make it limited. ----------------------------------------------------------------------------- 1000906004 Nice limited plasma up to 1.5 sec, with right gap around 1 cm throughout. Next shot: no PCS changes ----------------------------------------------------------------------------- 1000906005 Plasma. Disrupted at 1.06 sec because of an injection. Next shot: Drop target to 0.9e20. ----------------------------------------------------------------------------- 1000906006 Plasma. For next shot: no changes ----------------------------------------------------------------------------- 1000906007 Plasma. For next shot: lower density to 0.8e20 ----------------------------------------------------------------------------- 1000906008 Plasma. Density is around 0.7e20. It looks like the He puff was increasing the density a lot and did not allow it to go below 0.9e20. It was turned off for this shot and the situation improved. We'll keep it off for the rest of the day. For next shot: slow down density ramp-up somewhat Alternator has some kind of vibration problem - it was slowed down to 1632 rpm after this shot ----------------------------------------------------------------------------- 1000906009 Dud. Low prepuff ? For next shot: increase prepuff to 24 msec (from 20) Start ECDC between shots ---------------------------------------------------------------------------- 1000906010 Fizzle. The gas went up a lot 0.062 -> 0.086. Late breakdown. Bz looks too high For next shot: Drop prepuff to 22 msec, lower Bz -1292 -> -1305 of EF4U ---------------------------------------------------------------------------- 1000906011 Fizzle. For next shot: prepuff 22 msec -> 20 msec, Bz -1305 -> -1320 of EF4U ---------------------------------------------------------------------------- 1000906012 Plasma For next shot: no changes ---------------------------------------------------------------------------- 1000906013 Plasma For next shot: no changes ---------------------------------------------------------------------------- 1000906014 FIzzle. No apparent reason. Next shot: Twicked OH1 and OH2 trying to compensate for changes of voltage due to alternator slowing down. ---------------------------------------------------------------------------- 1000906015 Plasma. Late breakdown (0.007) For next shot: lower Bz -1320 -> -1335 ---------------------------------------------------------------------------- 1000906016 Plasma. Breakdown at 0.056. Next shot: no changes ___________________________________________________________________________________ 1000906017 Plasma. Disrupted at 1.25 sec, injection. Next shot: changed CLEARIN and RCUR to get diverted plasma ---------------------------------------------------------------------------- 1000906018 Plasma. Nice diverted shot with 2.6 MW out of D and E (D trips a lot) Long steady-state EDA. For next shot: Bt to 5.5 T (TF -144700 -> -153000) ---------------------------------------------------------------------------- 1000906019 Plasma. Long steady-state EDA, RF 2.5 MW, Bt 5.44 T For next shot: Bt to 5.9 T (TF -153000 -> -165600) ---------------------------------------------------------------------------- 1000906020 Plasma. Long steady-state EDA, RF 2.3 MW, Bt 5.8 T For next shot: Bt to 6 T (TF -165600 -> -171000) ---------------------------------------------------------------------------- 1000906021 Shot abborted because of alternator problems - no excitation voltage. Next shot: no power CAMAC cycle. ---------------------------------------------------------------------------- Same alternator problem Next shot: No power alternator test ---------------------------------------------------------------------------- 1000906022 Test OK Next shot: Try to get some plasma. ________________________________________________________________________ 1000906022 PLasma, 2.3 MW RF, 6.05 T, EDA |
| Session Leader Comments | |||
| Sep 6 2000 09:41:20:153AM | John Goetz | Engineering setup for 1000906: 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 1000901025 (0.8 MA, 5.2 T, inner-wall limited) Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled leave B-side upper as is Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV DNB gate valve will be DISABLED today, at least for the beginning of the run. ------------------------------------------------------------------------------- Run plan for 1000906: MP 268 -- ICRF Conditioning Go back to the 0.8 MA inner-wall limited discharges from this past Wednesday and continue to condition J-port. | |
| Sep 6 2000 09:05:19:030AM | 1000906001 | Steve Wukitch | 001 OH test |
| Sep 6 2000 09:29:01:653AM | 1000906002 | Steve Wukitch | 002 dud |
| Sep 6 2000 10:07:31:653AM | 1000906003 | John Goetz | Shot 003: 0.6MW from D-port at 1.2 to 1.45s 0.6MW from E-port at 0.9 to 1.15s 0.3MW from both J-ports at 0.6 to 0.85s Results: 0.62MW from D-port; no faults 0.66MW from E-port; no faults 0.29MW from J3; no faults 0.31MW from J4; no faults phase was [0,1,-0.6,0.4]*!pi core Te and neutron rate much lower with this phase |
| Sep 6 2000 10:17:30:590AM | 1000906004 | John Goetz | Shot 004: 0.6MW from D-port at 1.2 to 1.45s 0.6MW from E-port at 0.9 to 1.15s 0.3MW from both J-ports at 0.65 to 0.85s change phase from 195 to 310 Results: 0.61MW from D-port; no faults 0.64MW from E-port; no faults 0.29MW from J3; no faults 0.32MW from J4; no faults phase was [0,1,0.75,-0.25]*!pi; went the wrong way with the phase change core Te and neutron rate much lower with this phase; lots of injections |
| Sep 6 2000 11:09:33:950AM | 1000906005 | John Goetz | Shot 005: 0.6MW from D-port at 1.2 to 1.45s 0.6MW from E-port at 0.9 to 1.15s 0.3MW from both J-ports at 0.65 to 0.85s change phase from 310 to 85 Results: early disruption from a moly injection 0.64MW from E-port; one fault at disruption 0.29MW from J3; no faults 0.32MW from J4; no faults phase was [0,1,-0.1,0.9]*!pi Te, neutron rate, Wmhd are comparable between E and J |
| Sep 6 2000 11:09:49:437AM | 1000906006 | John Goetz | Shot 006: lower density to 0.9(nl04) to get rid of MARFE 0.6MW from D-port at 1.2 to 1.45s 0.6MW from E-port at 0.9 to 1.15s 0.3MW from both J-ports at 0.65 to 0.85s change phase from 85 to 72 Results: 0.61MW from D-port; no faults 0.64MW from E-port; no faults 0.29MW from J3; no faults 0.32MW from J4; no faults phase was [0,1,-0.1,0.9]*!pi Te, neutron rate, Wmhd are comparable between J and D,E |
| Sep 6 2000 11:08:17:560AM | 1000906007 | John Goetz | Shot 007: 0.8MW from D-port at 1.05 to 1.15s and 0.5MW from 1.2 to 1.45s 0.8MW from E-port at 0.75 to .85s and 0.5MW from 1.2 to 1.45s 0.4MW from both J-ports at 0.9 to 1.0s change phase from 72 to 65 Results: 0.84 and 0.51MW from D-port; no faults 0.84 and 0.55MW from E-port; no faults 0.38MW from J3; no faults 0.43MW from J4; no faults phase was [0,1,0,1]*!pi Te, neutron rate, Wmhd are with J than with D and E; injections coming from the Faraday screen; no hot spots in the corners |
| Sep 6 2000 11:29:08:263AM | 1000906008 | John Goetz | Shot 008: 0.8MW from D-port at 1.05 to 1.15s and 1.0MW from 1.2 to 1.45s 0.8MW from E-port at 0.75 to .85s and 1.0MW from 1.2 to 1.45s 0.4MW from both J-ports at 0.9 to 1.0s Results: 0.79 and 0.96MW from D-port; no faults 0.85 and 1.04MW from E-port; no faults 0.37MW from J3; no faults 0.41MW from J4; no faults phase was [0,1,0,1]*!pi Te, neutron rate, Wmhd are lower with J than with E (D is at lower density); no difference in radiation; no hot spots in the corners |
| Sep 6 2000 11:39:16:280AM | 1000906009 | John Goetz | Shot 009: 1.0MW from D-port at 1.05 to 1.15s and 1.25MW from 1.2 to 1.45s 1.0MW from E-port at 0.75 to .85s and 1.25MW from 1.2 to 1.45s 0.5MW from both J-ports at 0.9 to 1.0s Results: Dud |
| Sep 6 2000 12:02:48:420PM | 1000906010 | John Goetz | Shot 010: 1.0MW from D-port at 1.05 to 1.15s and 1.25MW from 1.2 to 1.45s 1.0MW from E-port at 0.75 to .85s and 1.25MW from 1.2 to 1.45s 0.5MW from both J-ports at 0.9 to 1.0s Results: Fizzle |
| Sep 6 2000 12:56:29:090PM | 1000906011 | John Goetz | Shot 011: 1.0MW from D-port at 1.05 to 1.15s and 1.25MW from 1.2 to 1.45s 1.0MW from E-port at 0.75 to .85s and 1.25MW from 1.2 to 1.45s 0.5MW from both J-ports at 0.9 to 1.0s Results: Fizzle |
| Sep 6 2000 12:59:04:280PM | 1000906012 | John Goetz | Shot 012: 1.0MW from D-port at 1.05 to 1.15s 1.0MW from E-port at 0.75 to .85s 0.5MW from both J-ports at 0.9 to 1.0s; 1.0MW from J3 at 1.2 to 1.3s; 1.0MW from J4 at 1.35 to 1.45s Results: 1.08MW from D-port; no faults 1.06MW from E-port; no faults 0.48MW from J3; no faults - 0.97MW from J3; two faults 0.54MW from J4; no faults - 1.09MW from J4; one fault Te, neutron rate, Wmhd are lower with J than with D and E; one injection but not mudh difference in radiation; no hot spots in the corners with only 0.5MW per strap pair; the H-port corners hot spots light up with J3 running at 1.0MW and the K-port corners light up with J4 running |
| Sep 6 2000 01:23:39:543PM | 1000906013 | John Goetz | Shot 013: 1.2MW from D-port at 1.05 to 1.15s 1.2MW from E-port at 0.75 to .85s 0.6MW from both J-ports at 0.9 to 1.0s; 1.0MW from J3 at 1.2 to 1.3s; 1.0MW from J4 at 1.35 to 1.45s Results: 1.29MW from D-port; no faults 1.21MW from E-port; no faults 0.57MW from J3; no faults - 0.95MW from J3; three faults 0.63MW from J4; no faults - 1.04MW from J4; no faults Te, neutron rate, Wmhd are slightly lower with J than with E; not much difference in radiation for the three pulses; D is the best antenna in this bunch At the high power with single strap pairs, there are lots of injections and not much heating |
| Sep 6 2000 02:18:36:420PM | 1000906015 | John Goetz | Shot 015: 1.5MW from D-port at 1.05 to 1.15s; 1.5MW from D-port at 1.2 to 1.45s 1.5MW from E-port at 0.75 to .85s; 1.5MW from E-port at 1.2 to 1.45s 0.75MW from both J-ports at 0.9 to 1.0s Results: 1.6MW from D-port; no faults - 1.6MW; four faults 1.57MW from E-port; no faults - 1.55MW; no faults 0.73MW from J3; no faults 0.8MW from J4; no faults central Te (.85 vs 1 delta), neutron rate (1.1 vs 1.3 delta), Wmhd (14 vs 18 kJ delta) are slightly lower with J than with E; not much difference in radiation for the three pulses no glow in the corners on this one; a small injection from the screen @ 0.98s |
| Sep 6 2000 02:37:49:560PM | 1000906016 | John Goetz | Shot 016: 1.5MW from D-port at 1.05 to 1.15s 1.5MW from E-port at 0.75 to .85s 0.75MW from both J-ports at 0.9 to 1.4s Results: 1.6MW from D-port; two faults (due to the limiter H-mode) 1.55MW from E-port; no faults 0.73MW from J3; seven faults 0.8MW from J4; three faults J has slightly less performance than E (before D turns on) glow in the corners on this one, starting after about 1.15s (Chromex nitrogen signal rises dramatically at this time; boron signal is up for all of the pulse) many injections from the Faraday screen |
| Sep 6 2000 03:00:53:920PM | 1000906017 | John Goetz | Shot 017: 1.3MW from D-port at 0.6 to 0.7s 1.3MW from E-port at 0.75 to .85s 0.75MW from both J-ports at 0.9 to 1.4s Results: 1.4MW from D-port; no faults 1.3MW from E-port; no faults 0.73MW from J3; one fault 0.8MW from J4; no faults early disruption from J this time J has slightly less performance than E (and D) glow in the corners on this one, starting after about 1.15s (Chromex nitrogen signal rises dramatically at this time as does the boron signal) many injections from the Faraday screen looks like an energy problem - run longer pulses and get hot spots after ~0.25s |
| Sep 6 2000 03:18:06:090PM | 1000906018 | John Goetz | Shot 018: reload shot 1000830025, a diverted 1MA discharge 1.3MW from D-port at 0.6 to 1.25s 1.25MW from E-port at 0.6 to 1.25s 0.75MW from both J-ports at 0.9 to 1.4s Results: diverted plasma; 800kA; 5.2T; H-mode 1.3MW from D-port; max faults (all DC0) 1.3MW from E-port; no faults 0.75MW from J3; one fault 0.75MW from J4; one faults two brief H-modes with J alone; there is a glow in the upper H-port corner |
| Sep 6 2000 03:36:58:560PM | 1000906019 | John Goetz | Shot 019: raise toroidal field to 5.5T tune up #3 and #4 1.05MW from D-port at 0.6 to 1.25s 1.25MW from E-port at 0.6 to 1.25s 0.75MW from both J-ports at 1.3 to 1.45s Results: diverted plasma; 800kA; 5.45T; H-mode 1.1MW from D-port; one fault at L->H transition 1.3MW from E-port; no faults 0.7MW from J3; one fault at turn-on 0.7MW from J4; no faults one H-mode with J alone; there is still a glow in the upper H-port corner |
| Sep 6 2000 04:00:01:060PM | 1000906020 | John Goetz | Shot 020: raise toroidal field to 6.0T tune up all antennas 1.05MW from D-port at 0.6 to 1.25s 1.25MW from E-port at 0.6 to 1.25s 0.75MW from both J-ports at 1.3 to 1.45s Results: diverted plasma; 800kA; 5.8T; H-mode 1.1MW from D-port; one fault late 1.2MW from E-port; one fault late 0.7MW from J3; two faults 0.7MW from J4; two faults no H-mode with J alone; no glow in the upper H-port corner but plenty of injections from the screen |
| Sep 6 2000 05:16:08:997PM | 1000906023 | John Goetz | Shot 023: raise toroidal field to 6.0T tune up all antennas 1.05MW from D-port at 0.6 to 1.25s 1.25MW from E-port at 0.6 to 1.25s 0.75MW from both J-ports at 1.3 to 1.45s Results: diverted plasma; 800kA; 6.05T; 2 H-modes 1.1MW from D-port; one fault in the middle; tune off a bit 1.3MW from E-port; no faults; tune off as the shot progresses big injection @ 0.88s that eventually causes the H->L 0.7MW from J3; three faults 0.7MW from J4; one fault no H-mode with J alone; but plenty of injections from the screen (Ti observed with the McPherson) |
| Physics Operator Comments | |||
| Sep 6 2000 09:02:01:590AM | Dmitri Mossessian | Engineering setup for 1000906: 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 1000901025 (0.8 MA, 5.2 T, inner-wall limited) Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid enabled leave B-side upper as is Hybrid DISABLED fill C-side with 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV DNB gate valve will be DISABLED today, at least for the beginning of the run. ____________________________________________________ 8:50 Loaded 1000901025. Coldstart OK First shot will be OH test | |
| Sep 6 2000 09:07:07:513AM | 1000906001 | Dmitri Mossessian | Engineering setup for 1000906: Overnight ECDC in D2, stopping 1-2 hours prior to the run. Run begins at 9:00 and ends at 17:00. OH test OK Next shot: Plasma |
| Sep 6 2000 09:32:25:903AM | 1000906002 | Dmitri Mossessian | EF1_upper power supply problem. |
| Sep 6 2000 10:09:58:250AM | 1000906003 | Dmitri Mossessian | Plasma. H/D ratio is about 3%. We are not going to do ECDC between shots unless it gets to above 5%. Plasma is not limited (according to EFIT) between .56 and 1 sec. For next shot: drop CLEARIN more to make it limited. |
| Sep 6 2000 10:16:38:200AM | 1000906004 | Dmitri Mossessian | Nice limited plasma up to 1.5 sec, with right gap around 1 cm throughout. Next shot: no PCS changes |
| Sep 6 2000 10:35:42:153AM | 1000906005 | Dmitri Mossessian | Plasma. Disrupted at 1.06 sec because of an injection. Next shot: Drop target to 0.9e20. |
| Sep 6 2000 10:46:35:997AM | 1000906006 | Dmitri Mossessian | Plasma. For next shot: no changes |
| Sep 6 2000 11:03:23:357AM | 1000906007 | Dmitri Mossessian | Plasma. For next shot: lower density to 0.8e20 |
| Sep 6 2000 04:28:02:733PM | 1000906008 | Dmitri Mossessian | Plasma. Density is around 0.7e20. It looks like the He puff was increasing the density a lot and did not allow it to go below 0.9e20. It was turned off for this shot and the situation improved. We'll kep it off for the rest of the day. For next shot: slow down density ramp-up somewhat Alternator has some kind of vibration problem - it was slowed down to 1632 rpm after this shot |
| Sep 6 2000 11:47:16:437AM | 1000906009 | Dmitri Mossessian | Dud. Low prepuff ? For next shot: increase prepuff to 24 msec (from 20) Start ECDC between shots |
| Sep 6 2000 12:05:30:953PM | 1000906010 | Dmitri Mossessian | Fizzle. The gas went up a lot 0.062 -> 0.086. Late breakdown. Bz looks too high For next shot: Drop prepuff to 22 msec, lower Bz -1292 -> -1305 of EF4U |
| Sep 6 2000 12:23:53:123PM | 1000906011 | Dmitri Mossessian | Fizzle. For next shot: prepuff 22 msec -> 20 msec, Bz -1305 -> -1320 of EF4U |
| Sep 6 2000 01:26:52:577PM | 1000906012 | Dmitri Mossessian | Plasma For next shot: no changes |
| Sep 6 2000 01:26:57:937PM | 1000906013 | Dmitri Mossessian | Plasma For next shot: no changes |
| Sep 6 2000 01:54:41:530PM | 1000906014 | Dmitri Mossessian | FIzzle. No apparent reason. Next shot: Twicked OH1 and OH2 trying to compensate for changes of voltage due to alternator slowing down. |
| Sep 6 2000 02:06:29:840PM | 1000906015 | Dmitri Mossessian | Plasma. Late breakdown (0.007) For next shot: lower Bz -1320 -> -1335 |
| Sep 6 2000 02:23:48:140PM | 1000906016 | Dmitri Mossessian | Plasma. Breakdown at 0.056. Next shot: no changes |
| Sep 6 2000 02:47:54:840PM | 1000906017 | Dmitri Mossessian | Plasma. Disrupted at 1.25 sec, injection. Next shot: no changes |
| Sep 6 2000 02:59:00:607PM | 1000906017 | Dmitri Mossessian | Plasma. Disrupted at 1.25 sec, injection. Next shot: changed CLEARIN and RCUR to get diverted plasma |
| Sep 6 2000 03:16:02:170PM | 1000906018 | Dmitri Mossessian | Plasma. Nice diverted shot with 2.6 MW out of D and E (D trips a lot) Long steady-state EDA. For next shot: Bt to 5.5 T (TF -144700 -> -153000) |
| Sep 6 2000 03:31:54:827PM | 1000906019 | Dmitri Mossessian | Plasma. Long steady-state EDA, RF 2.5 MW, Bt 5.44 T For next shot: Bt to 5.9 T (TF -153000 -> -165600) |
| Sep 6 2000 03:55:56:090PM | 1000906020 | Dmitri Mossessian | Plasma. Long steady-state EDA, RF 2.3 MW, Bt 5.8 T For next shot: Bt to 6 T (TF -165600 -> -171000) |
| Sep 6 2000 04:13:00:247PM | 1000906021 | Dmitri Mossessian | Shot abborted because of alternator problems - no excitation voltage. Next shot: no power CAMAC cycle. |
| Sep 6 2000 04:42:09:497PM | 1000906021 | Dmitri Mossessian | Same alternator problem Next shot: No power alternator test |
| Sep 6 2000 04:46:24:983PM | 1000906022 | Dmitri Mossessian | Test OK Next shot: Try to get some plasma. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:02:53:373AM | Test | Ok | OH Power Supply Test |
| 2 | 09:21:13:140AM | Plasma | Bad | EF1U did not fire |
| 3 | 09:51:27:090AM | Plasma | Ok | |
| 4 | 10:09:59:420AM | Plasma | Ok | |
| 5 | 10:22:55:140AM | Plasma | Ok | |
| 6 | 10:39:28:153AM | Plasma | Ok | |
| 7 | 10:54:27:123AM | Plasma | Ok | |
| 8 | 11:11:16:733AM | Plasma | Ok | |
| 9 | 11:34:56:140AM | Plasma | Ok | |
| 10 | 11:57:51:840AM | Plasma | Ok | |
| 11 | 12:17:52:327PM | Plasma | Ok | |
| 12 | 12:39:39:670PM | Plasma | Ok | |
| 13 | 01:02:56:483PM | Test | Ok | |
| 14 | 01:28:02:780PM | Test | Ok | |
| 15 | 01:56:04:373PM | Test | Ok | |
| 16 | 02:17:24:107PM | Test | Ok | |
| 17 | 02:37:38:747PM | Test | Ok | |
| 18 | 03:00:40:390PM | Test | Ok | |
| 19 | 03:22:13:467PM | Plasma | Ok | |
| 20 | 03:44:46:937PM | Plasma | Ok | |
| 21 | 04:07:32:170PM | Test | Bad | NO EXCITATION VOLTAGE |
| 22 | 04:42:52:247PM | Test | Ok | Alternator speed increased and excitation came on. |
| 23 | 04:56:33:733PM | Plasma | Ok | |