| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Gerd Schilling |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Frank Silva,Gary Dekow |
| Engineering Operator Run Comment |
| MP#268 ICRF Conditioning/Wolfe/Silva/Dekow |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:22:837PM |
| Author: To Be Determined |
| Session Leader's Summary for Wednesday, April 26, 2000 (1000426) SL: Schilling PO: Wolfe EO: Silva/Dekow Objectives: bring up RF in E-Port (FMIT #2) and J-Port (FMIT #3,4) antennas continue DNB checkout continue machine conditioning Results: We started putting RF power into the antennas one transmitter at a time (shots 2-5). This brought E-Port up to 1 MW, J3 up to 0.8 MW, and J4 up to 0.7 MW. The RF pulses were staggered through the discharge. Shot 6 disrupted relatively early at ~0.8 s, as J3 was ramping through 0.5 MW, with some faulting going on. Shots 7 and 8 were power tests, and plasmas with RF resumed at shot 9. Shots 9-11 had E at 1.5 MW, J3 at 0.3 MW, and J4 at 0.4 MW, staggered. Shot 12 was a fizzle. On shot 13 we started to overlap J3 and J4, but staggered them with respect to E; E was up to 1.3 MW, J3 0.45 MW, and J4 0.55 MW. On shots 14-17 the power continued to slowly come up on J3 and J4; we started to ovelap E-Port and J-Port. Power levels reached E=1 MW, J3=0.55 MW, J4=0.65 MW, and total during the overlap =2.1 MW. For these shots we regularly experienced disruptions, and the suspicion arose that the disruptions were caused by RF pickup and interference in the EF4 supply. On shot 16 we delayed E by 100 ms compared to 14 and 15 on the thought that the disruption was triggered by total RF power, but the disruption was delayed by ~200 ms. Shot 17 was a repeat, almost identical. Shot 18 was run with no RF, and went fine. On shot 19 we ran only E, ramping up the power from 1-1.5 MW; no disruption. On shot 20 we put in 1.2 MW from J3+J4 only, and it disrupted. On shot 21 we ramped E from 0.5-1.25 MW and simultaneously added J3+J4=0.75 MW, without a disruption. Shot 22 had E with a 1-1.25 MW ramp plus J3+J4=0.9 MW, with a disruption. These last shots suggest that a J-Port power threshold somewhat below 0.9 MW appears to interfere with EF4, leading to a disruption. However, the time shift of E in shots 16 and 17 compared to 14 and 15 changed the onset of the disruption, with J at ~1.2 MW. This picture is far from clear at the moment, and we need to continue to track this mischief down. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:10:410PM |
| Author: To Be Determined |
| Physop Summary for Wednesday April 26, 2000 MP#268 ICRF Commissioning SL: Schilling PO: wolfe EO: Silva/Dekow Engineering setup: ------------------- ECDC overnight in D2, turn off 2 hours before run Power system setup as on 1000421019 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: VUV and ECE Run Plan: --------- Begin with a standard "Tuesday" OH test. Start plasma operations from a reload of 1000421019 (800kA, nl4=8e19, TF=5.4T) and proceed with conditioning. The main goal of the day is to condition E- (FMIT#2) and J-port (FMIT#3 & 4) to high power. D-port (FMIT#1) is not expected to be available. The DNB will attempt to open gate valves with the arc on, but no HV during plasmas at some point during the run. This will be a minimal start on MP266. Rice and Marmar may request permission to fire Li pellets late in some shots. Rice will also want Argon to finish alignment/calibration of HIREX. Results: -------- We got off to a late start, because the new in-cell e-stop switch had been wired incorrectly. Once this was repaired the oh test was run at ~09:30. The first half of the run went pretty well. The second half had many disruptions. Most of these were caused by a power systems fault which was diagnosed as due to RF pickup, probably related to j-port antenna and/or fmit #3 and/or 4. The immediate symptom was an IOC on EF4. We also heard a brief burst from the power room O2 alarm, and a peak-reading rf meter registered >0.5mw/cm2 in the power room during a shot. The first occurrence of this effect was on shot 6; shots 7 and 8 were EF4 tests, which went through fine. The next appearance of the effect was shot #14. Despite these problems, progress was made in conditioning both antennas, getting up to over 2MW total power from E and J together, and about 1.3MW from each independently. For shot #11 and thereafter, a tf waggle up to 5.7T was inserted for the benefit of PCI. Unfortunately, these shots more or less coincided with the power supply problems, so there were only a few possible candidates with e-port on at the time of the waggle. The argon puff was increased to 75msec (shot#5-22) to increase JR's signal for calibration. Future physops may find this level too high if they are loading from these shots. The dnb group ran various combinations of gate valve open, gas puff and arc on. Having the dnb gate valve open does affect the initial pressure by about 10%, lower for gv open and no puff, 10% higher with the puff (at ~-1sec). Earl and John exercised the LPI, getting several pellets in, when the plasma was still around by the time they fired. Moving the start of the outward rcur ramp earlier for shot #3 and all subsequent shots seemed to cure the crossover vertical position thrash. Startup was pretty reliable today. There was only one "fizzle", a 60kA lossage following a late disruption. I played some with the gas puff and segment 1 pg3 puff, mainly to try to get rid of runaways and compensate for the dnb gas effects. Fields looked good and were pretty stable all day. There were numerous power room and cell accesses throughout the day. Before one of them, one of the switches to open one of the tf breakers hung up and started smoking. This was cleared, and worked thereafter, despite some scorched wiring. Scorecard: ---------- tests 3 duds 0 fizzles 1 plasmas 18 ------ -- shots 22 |
| Session Leader Comments | |||
| Apr 26 2000 09:41:55:420AM | 1000426001 | Gerd Schilling | OH test |
| Apr 26 2000 10:24:01:873AM | 1000426002 | Gerd Schilling | Plasma, RF, ramp up to ~1 MW from E-Port 1.05 - 1.5 s , ~0.4 MW from J4 0.8 - 1.05 s. |
| Apr 26 2000 10:34:06:373AM | 1000426003 | Gerd Schilling | Plasma, RF, ~1 MW flat top from E-Port 1.05 - 1.5 s , ramp up to ~0.4 MW from J4 0.8 - 1.05 s. |
| Apr 26 2000 11:08:45:937AM | 1000426004 | Gerd Schilling | Plasma, RF; ~1 MW flat top E-Port 1.05 - 1.5 s , ramp up to ~0.2 MW J3 0.7 - 0.8 s, ramp up to ~0.75 MW J4 0.8 - 1.05 s. |
| Apr 26 2000 11:25:45:077AM | 1000426005 | Gerd Schilling | Plasma, RF; ~1.3 MW flat top E-Port from 1.05 - 1.5 s, ramp J3 up to ~0.7 MW from 0.6 - 0.8 s, ramp J4 up to ~0.75 MW from 0.8 - 1.05 s. |
| Apr 26 2000 11:44:28:030AM | 1000426006 | Gerd Schilling | Plasma, RF; disrupted ~0.76 s, J3 up to ~0.5 MW. |
| Apr 26 2000 12:09:20:233PM | 1000426007 | Gerd Schilling | Power test |
| Apr 26 2000 12:30:21:000PM | 1000426008 | Gerd Schilling | Power test. |
| Apr 26 2000 12:46:38:483PM | 1000426009 | Gerd Schilling | Plasma, RF; E-Port flat top at ~1.5 MW, but multiple faults and termination ~1.13 s; J3 flat top at ~0.35 MW from 0.6 - 0.9 s; J4 flat top at ~0.45 MW from 0.75 - 1.05 s. |
| Apr 26 2000 12:55:51:043PM | 1000426010 | Gerd Schilling | Plasma, RF; E-Port flat top at ~1.4 MW from 1.05 - 1.5 s; J3 flat top at ~0.3 MW from 0.6 - 0.9 s; J4 flat top at ~0.4 MW from 0.75 - 1.05 s. |
| Apr 26 2000 01:17:21:997PM | 1000426011 | Gerd Schilling | Plasma, RF; E-Port flat top at ~1.3 MW from 1.05 - 1.1 s; J3 flat top at ~0.35 MW from 0.6 - 1.05 s; J4 flat top at ~0.4 MW from 0.6 - 1.05 s. |
| Apr 26 2000 02:02:56:483PM | 1000426013 | Gerd Schilling | Plasma, disrupted at 1.28 s, RF; E-Port flat top at ~1.4 MW from 1.05 - 1.28 s; J3 flat top ~0.4 MW from 0.6 - 1.05 s; J4 flat top ~0.55 MW from 0.6 - 1.05 s. |
| Apr 26 2000 02:14:51:030PM | 1000426014 | Gerd Schilling | Plasma, disrupted at 0.9 s, RF; E-Port flat top at ~1 MW from 0.8 - 0.9 s; J3 flat top ~0.55 MW from 0.6 - 0.9 s; J4 flat top ~0.6 MW from 0.6 - 0.9 s. |
| Apr 26 2000 02:35:11:217PM | 1000426015 | Gerd Schilling | Plasma, disrupted at 0.92 s, RF; E-Port flat top at ~1 MW from 0.8 - 0.92 s; J3 flat top ~0.55 MW from 0.6 - 0.92 s; J4 flat top ~0.6 MW from 0.6 - 0.92 s. |
| Apr 26 2000 03:14:43:123PM | 1000426016 | Gerd Schilling | Plasma, disrupted at 1.12 s, RF; E-Port flat top at ~1 MW from 0.9 - 1.12 s (delayed by 0.1 s from previous shot); J3 flat top ~0.55 MW from 0.6 - 1.12 s; J4 flat top ~0.6 MW from 0.6 - 1.12 s. |
| Apr 26 2000 03:29:02:700PM | 1000426017 | Gerd Schilling | Plasma, disrupted at 1.1 s, RF; E-Port flat top at ~1 MW from 0.9 - 1.1 s ; J3 flat top ~0.55 MW from 0.6 - 0.95 s (fault); J4 flat top ~0.6 MW from 0.6 - 1.1 s. |
| Apr 26 2000 03:55:29:293PM | 1000426018 | Gerd Schilling | Plasma, RF turned off to compare with previous disrupting shots. |
| Apr 26 2000 04:06:45:890PM | 1000426019 | Gerd Schilling | Plasma, RF; E-Port only, ramp from 1 - 1.5 MW at 0.6 - 1.3 s, faulting during last ~0.1 s. |
| Apr 26 2000 04:32:14:077PM | 1000426020 | Gerd Schilling | Plasma, disrupted at 0.88 s, RF; J-Port only, J3 flat top at ~0.55 MW from 0.6 - 0.88 s, J4 flat top at ~0.65 MW from 0.6 - 0.88 s. |
| Apr 26 2000 04:51:16:170PM | 1000426021 | Gerd Schilling | Plasma, RF; E-Port ramp from 0.5 - 1.25 MW from 0.6 - 1.3 s; J3 flat top at ~0.35 MW from 0.6 - 1.3 s; J4 flat top at ~0.4 MW from 0.6 - 1.2 s (fault). |
| Apr 26 2000 05:18:24:983PM | 1000426022 | Gerd Schilling | Plasma, disrupted at 1.12 s, RF; E-Port ramp from 1 - 1.2 MW from 0.6 - 1.12 s; J3 flat top at ~0.4 MW from 0.6 - 1.12 s; J4 flat top at ~0.5MW from 0.6 - 1 s (faulted). |
| Physics Operator Comments | |||
| Apr 26 2000 07:52:34:107AM | Steve Wolfe | load from 1000421019 = 800ka, 8e19, 5.4T shot from Friday coldstart at 07:45 - all matrices respond | |
| Apr 26 2000 08:05:40:950AM | Steve Wolfe | Engineering Setup and Run Plan for Wednesday April 26, 2000 Run to start at 9:00AM and end at 5:00PM MP#268 ICRF Commissioning SL: Schilling PO: wolfe EO: Silva/Dekow Engineering setup: ------------------- ECDC overnight in D2, turn off 2 hours before run Power system setup as on 1000421019 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: VUV and ECE Run Plan: --------- Begin with a standard "Tuesday" OH test. Start plasma operations from a reload of 1000421019 (800kA, nl4=8e19, TF=5.4T) and proceed with conditioning. The main goal of the day is to condition E- (FMIT#2) and J-port (FMIT#3 & 4) to high power. D-port (FMIT#1) is not expected to be available. The DNB will attempt to open gate valves with the arc on, but no HV) during plasmas at some point during the run. This will be a minimal start on MP266. Rice and Marmar may request permission to fire Li pellets late in some shots. Rice will also want Argon to finish alignment/calibration of HIREX. | |
| Apr 26 2000 09:45:23:780AM | 1000426001 | Steve Wolfe | shot#1: Tuesday oh test Got an up-glitch at 0.923sec on the oh2U and L currents at turn-off. It was there last week too, just looked a little funny. It's clearly induced by oh1 turn-off by f.d. No problem. For shot#2: Because we had some runaways on 1000421019, some startup changes: Increase pre-puff from 25msec to 28msec; Start seg#1 pg3 puff at 28msec instead of 30msec. |
| Apr 26 2000 10:22:13:467AM | 1000426002 | Steve Wolfe | shot#2: First plasma attempt Because we had some runaways on 1000421019, some startup changes: Increase pre-puff from 25msec to 28msec; Start seg#1 pg3 puff at 28msec instead of 30msec. plasma, full length. RF fired ok. Some injections, including some during rf (0.82sec( big vertical thrash at .45sec. RF steps up to 1MW. POssible dithers at 1.4sec H/D below 0.1 Next shot: Move rcur shift earlier (to ~.30 sec from .4) to relieve the jump, hopefully reduce the crossover thrash. |
| Apr 26 2000 10:35:53:467AM | 1000426003 | Steve Wolfe | shot#3: Move rcur shift earlier (to ~.30 sec from .4) to relieve the jump, hopefully reduce the crossover thrash. plasma, full length, no crossover thrash, rf flat at 1MW from 1.05-1.5, ramp to 0.5MW from 0.8-1.05 Injections at .54, 1.33 among others. Note: Argon has been on for shots #2-3 Next shot: no pcs changes. |
| Apr 26 2000 11:14:55:733AM | 1000426004 | Steve Wolfe | shot#4: delay Ar pulse to 0.5sec plasma, full length, rf looks good. only one major injection, at .35sec j-ant is giving more bolo signal than E-, although it's only 60% as high power. next shot: increase Ar puff from 45->75msec |
| Apr 26 2000 11:26:37:687AM | 1000426005 | Steve Wolfe | shot#5: increase Ar puff from 45->75msec rf will try increasing e-port power, tuning j-port plasma, injection at 1.04sec, rf 1.26MW on E, j3 also higher power, also more Prad. next shot: No changes |
| Apr 26 2000 11:48:29:310AM | 1000426006 | Steve Wolfe | shot#6: No changes disrupted early .76sec, pf breaker pulled. EF4 voltage looks bad from 0.7 sec on, It looks like Ef1U crowbarred before the disruption. There was also a bad injection at 0.71sec EF4 had a spurious IOC fault; that seems to be the first problem. |
| Apr 26 2000 12:13:15:717PM | 1000426007 | Steve Wolfe | shot#7: EF4 only test, reverse bridge DNB will open gate valve on this test torus gauge went to 2e-5 Torr, DNB people claim the valve didn't open. pressure rise started at ~0.5sec is due to NINJA puff (He) reverse bridge test is ok. |
| Apr 26 2000 12:25:38:700PM | 1000426008 | Steve Wolfe | shot#8: EF4 only test, forward bridge DNB will open gate valve on this test. No permissive last shot. There was some 44 coming in before the shot. Disble VUV gate valve for #8 ef4 test ok. dnb gas puff shows up at -1sec, rises to 3e-6 gauge (.01 mTorr abs) Jim says less 44 increase this time. |
| Apr 26 2000 12:44:53:810PM | 1000426009 | Steve Wolfe | shot#9: try for another plasma, DNB will open. VUV re-enabled. plasma full length, had some runaways this time. e-port rf faulted early. Breakdown pressure up to .095 (dnb contribution) had a slight hesitation in current rise. Next shot: decrease pre-puff from 28->25msec to account for dnb puff LPI will attempt to fire at 1.55sec |
| Apr 26 2000 12:59:19:513PM | 1000426010 | Steve Wolfe | shot#10: decrease pre-puff from 28->25msec to account for dnb puff LPI will attempt to fire at 1.55sec plasma, got a pellet, nl4 up to 2e20 got about 1.5MW from E-port, up to 700kW from J pressure=.084mTorr, still a little hesitation in current rise. next shot: no dnb, leave pre-puff at 25msec put in a tf wiggle for pci. |
| Apr 26 2000 01:24:31:890PM | 1000426011 | Steve Wolfe | shot#11: no dnb, leave pre-puff at 25msec put in a tf wiggle for pci; increase tf current limit from 160->165kA disrupted after the pellet (1.61sec); looks like the chopper railed small injection at 1.614 precedes the chopper thrash, and the disruption seen on halpha, ece and bolo Rf got 700kW out of j, and e faulted early Next shot: increase waggle from 159 to 161kA for PCI |
| Apr 26 2000 01:40:29:217PM | 1000426012 | Steve Wolfe | shot#12: increase waggle from 159 to 161kA for PCI fizzle: gets to 61kA. disruption leftover? there's a big br excursion. next shot: increase pre-puff back to 28msec |
| Apr 26 2000 01:53:34:187PM | 1000426013 | Steve Wolfe | shot#13: increase pre-puff back to 28msec increase waggle from 159 to 161kA for PCI disrupts at 1.28sec, during rf, looks like an injection at 1.20-1.22 from the antenna some runaways at the start |
| Apr 26 2000 02:14:29:483PM | 1000426014 | Steve Wolfe | shot#14: no changes disrupted at .9sec, looks like another ef4 ioc fault at 0.82 rf was over 2MW (combined) |
| Apr 26 2000 02:34:59:733PM | 1000426015 | Steve Wolfe | shot#15: start seg#1 pg3 puff at 25msec same thing, at 0.92sec still some runaways, not bad Next shot: enable dnb gatevalve again |
| Apr 26 2000 03:09:06:360PM | 1000426016 | Steve Wolfe | shot#16: enable dnb gatevalve again. they will just open, no puff, no arc rf will delay fmit#2 by 100msec another ef4 ioc fault, at 1.01sec. RF had some fauting, the ef4 problem is at the max of the total rf. There are a lot of runaways this time. bd pressure down to .073mTorr next shot: engineers are putting ferrites on the ef4 shunt leads dnb will puff and arc next shot. No PCS changes. |
| Apr 26 2000 03:24:27:623PM | 1000426017 | Steve Wolfe | shot#17: engineers are putting ferrites on the ef4 shunt leads dnb will puff and arc next shot. No PCS changes. same thing. around .96sec p(0)=.93mTorr, still getting runaways. next shot: no rf |
| Apr 26 2000 03:48:20:217PM | 1000426018 | Steve Wolfe | shot#18: no rf LPI will fire at 1.0 and 1.3sec dnb will run their arc with gv closed disruption at 1.76sec, got one pellet at 1sec, other one didn't go? Injections at 1.7+sec killed it off. Next shot: e-port only, off by 1.3sec; Earl will fire at 1.3 dnb gv still closed |
| Apr 26 2000 04:03:29:233PM | 1000426019 | Steve Wolfe | shot#19: e-port only, off by 1.3sec; Earl will fire at 1.3 dnb gv still closed plasma full length, got a pellet next shot: same waveform for j-port, e-port off |
| Apr 26 2000 04:26:03:403PM | 1000426020 | Steve Wolfe | shot#20: same waveform for j-port, e-port off and another early (.82sec) ef4 fault. prf~1.2MW The fickle finger of fate is pointing to j-port |
| Apr 26 2000 04:46:12:653PM | 1000426021 | Steve Wolfe | shot#21: reduce power on jport, turn eport back on. plasma, full length with pellet. rf ramps to 2MW total. some hards again. there was a door ajar on EF4 cabinet until before this shot, which may be a clue. next shot: increase j-port power (was 800kW this time) |
| Apr 26 2000 05:04:47:187PM | 1000426022 | Steve Wolfe | shot#22: increase j-port power (was 800kW this time); dnb will open gv and puff, no arc another ef4 fault, disrupts at 1.1sec; it wasn't the door. big injection at 1.0sec, before the trip. didn't make it to the pellet. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:35:53:967AM | Test | Ok | OH1,2 10KA test OK |
| 2 | 10:03:04:483AM | Plasma | Ok | no faults/plasma |
| 3 | 10:25:51:687AM | Plasma | Ok | no faults/plasma |
| 4 | 10:55:53:560AM | Plasma | Ok | no faults/plasma. |
| 5 | 11:16:18:547AM | Plasma | Ok | no faults/plasma |
| 6 | 11:35:15:280AM | Plasma | Ok | EF4 problem |
| 7 | 12:06:29:763PM | Plasma | Ok | ef4 test ok |
| 8 | 12:18:53:763PM | Test | Ok | EF4 forward bridge test |
| 9 | 12:29:44:810PM | Plasma | Ok | no faults/plasma |
| 10 | 12:47:55:717PM | Plasma | Ok | no faults plasma |
| 11 | 01:09:01:607PM | Plasma | Ok | no faults TF at 165KA from 160KA/plasma |
| 12 | 01:30:49:700PM | Plasma | Ok | no faults/dud |
| 13 | 01:44:22:950PM | Plasma | Ok | no faults/disruption |
| 14 | 02:05:07:653PM | Plasma | Ok | EF4 Fault |
| 15 | 02:28:24:687PM | Plasma | Ok | |
| 16 | 02:49:28:513PM | Plasma | Ok | EF4 Fault |
| 17 | 03:17:48:450PM | Plasma | Ok | EF4 IOC fault |
| 18 | 03:37:43:543PM | Plasma | Ok | |
| 19 | 03:57:57:060PM | Plasma | Ok | |
| 20 | 04:18:01:390PM | Plasma | Ok | EF4 IOC Fault |
| 21 | 04:37:55:217PM | Plasma | Ok | |
| 22 | 04:56:42:903PM | Plasma | Ok | EF4 IOC |