| Miniproposals | ||||||||||||
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| Operators | |
| Session leader(s): | Rejean Boivin,Steve Wukitch |
| Physics operator(s): | Bill Rowan |
| Engineering operator(s): | Bill Parkin,Gary Dekow |
| Engineering Operator Run Comment |
| MP 268 RF Conditioning Sl: Wukitch/Boivin PO: Rowan EO: Dekow/Parkin |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:25:993PM |
| Author: To Be Determined |
| Engineering setup and run plan for Thursday 07 Dec 2000. MP #268 RF conditioning Session leaders: Wukitch/Boivin Physics operator: Rowan ------------------------------------------------------------------------------- Engineering setup: ECDC in D2 for 2 hours before the run. Power systems as on 1001206010. 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 Enable the following gate valves: ECE, VUV, Beast, DNB Run starts at 09:00 and ends at 17:00. ------------------------------------------------------------------------------- RF Setup: XMTRs 1,2,3, and 4 should be made ready by 8:00 (run-on). ------------------------------------------------------------------------------- Run Plan: Further tests of J-port performance as a four-strap. Re-load a late shot from yesterday (0.8 MA, 5.3 T, NL_ZMETER). Fire J-port into plasma. During the day we may raise the density, and if everything works well, we may eventually the current. ------------------------------------------------------------------------------- 001 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: plasma max faults from #4 next shot: retune and try again 002 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: plasma max faults from #4 next shot: retune and try again 003 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: plasma max faults from #4 next shot: 004 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: plasma max faults from #4 but ran longer reflected power suddenly jumps at 0.615 sec on #4 does not disappear with higher power - glow next shot: turn on harder (<1 msec) 005 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: plasma - early disruption 0.86 sec J4 max faulted again appears that the phase feedback is oscillating!? appears that the DC2 calibration factor is off since 003 break to vacuum test phase feedback and #4 phase shifter/stub tuner Found J3 and J4 vacuum tunes [st,ps]: J3: [424,375] compared to [441,385] J4: [435,147] compared to [435,635] There appears to be some coupling between J3 and J4. + conditioned up to 100 kW (~22 kV) + phase feedback appears to be working and responding +tested the range on #4 ST/PS set and found good agreement with recorded limits. -- found that to go from +0.2 pi to 0 pi needed to change from 50 deg to 95 deg -- antenna phase relationship 006 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: fizzle 007 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: plasma J3 0.6 MW, 3 faults J4 0.6 MW, max faults by end of pulse - much improved + phase was -0.2pi between 2-3 (needs to be 0) reduce from 77 deg to 50 deg for next shot 008 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2 MW [0.6,1.4] sec result: plasma J3 0.95 MW, 3 faults J4 0.9 MW, max faults by end of pulse - much improved + phase was -0.2pi between 2-3 at a phase setting of 50 deg. 009 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2 MW [0.6,1.4] sec result: plasma J3 0.95 MW, 6 faults J4 0.9 MW, 6 faults + phase was -0.2pi between 2-3 at a phase setting of 50 deg. 010 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2 MW [0.6,1.4] sec result: plasma, H-mode, disrupted ~1.32 sec J3 1.0 MW, 6 faults J4 1.1 MW, 6 faults 011 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2 MW [0.6,1.4] sec result: plasma changed upper triangularity from 0.4 to 0.25 J3 MW, max faults J4 MW, max faults upper antenna tiles are very bright 012 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2 MW [0.6,1.4] sec result: plasma changed upper triangularity from 0.4 to 0.25 J3 MW, max faults J4 MW, max faults upper antenna tiles are very bright - efit suggests we are rubbing the plasma against the antenna protection tiles 013 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2 MW [0.6,1.4] sec result: plasma J3 1.15 MW, max faults by end J4 1.3 MW, one fault next shot: try short high power pulse at start of RF 014 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 3.5 MW [0.6,1.4] sec result: plasma J3 1.6 MW, max faults by end J4 1.7 MW, one fault Having injections from top front tiles like we had with E-port Is the high neutral pressure the problem? 015 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 3.0 MW [0.6,1.4] sec result: plasma, early disruption - injections from antenna J3 1.5 MW, 5 faults J4 1.5 MW, 4 faults 016 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2.5 MW [0.6,1.4] sec result: plasma, H-modes early disruption - injections from antenna J3 1.2 MW, 3 faults J4 1.3 MW, 3 faults 017 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2.5 MW [0.6,1.4] sec result: plasma J3 1.2 MW, 3 faults J4 1.3 MW, 3 faults Summary: We spent time yesterday afternoon and this morning trying to eliminate the RF interference in the EF1 upper and lower. Further dummy load tests suggest that FMIT#3 has significant RF leakage that was difficult to fix. During test shots we were able to reduce the "induced" current by ~2, but appeared to be less effective during machine operation. Significant time was required to recondition the antenna so it would operate without max faults in the first 100 msec. There was evidence of a problem between the shorted end of the antenna and the voltage probes. A sudden increase in reflected power was seen on shot 005 and the voltage phase was different from the expected value. After conditioning the antenna in vacuum to 100 kW, the antenna began operating in plasma. There was significant visible light at the K-side upper corner of the antenna and over the strap centers between the BN and Mo tiles for RF power levels above 2 MW. The former may be the same interaction observed in October and the latter may be similar to the interaction observed with E-port when operated at high neutral pressure. We need to investigate effect of current and density on the observed phenomena. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:12:800PM |
| Author: To Be Determined |
| PhysOp Summary for 1001207 Experiment -------------------------- MP #268 RF conditioning Session leaders: Wukitch/Boivin Physics operator: Rowan Engineering operator: Dekow Engineering setup -------------------------- ECDC in D2 for 2 hours before the run. Power systems as on 1001206010. 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 Enable the following gate valves: ECE, VUV, Beast, DNB RF Setup: XMTRs 1,2,3, and 4 should be made ready by 8:00 (run-on). Run Plan ---------------------------- Further tests of J-port performance as a four-strap. Re-load a late shot from yesterday (0.8 MA, 5.3 T, NL_ZMETER). Fire J-port into plasma. During the day we may raise the density, and if everything works well, we may eventually the current. Summary --------------------------- Spanna crashed just before the start of the run. After a reboot, there were no further problems. From an operations point of view, the run was relatively uneventful. The disruptions were RF related. The single fizzle occurred after a period of RF vacuum conditioning and may too have been RF related. There was an attempt to change the upper x-point. Brian suggested this as a means for reducing the midplane pressure. Desirable for RF and for DNB. The x-point did move. The midplane pressure was unaffected. This was quickly abandoned as the change in configuration led to hitting the current limit on EF1_U Score Card --------------------------- Tests 0 Duds 0 Fizzles 1 Disruptions 4 Plasmas 12 ---------------- Total 17 Details of the run -------------------------- 001. Plasma. Full length. Disrupted during the ramp down at 1.8 s. Breakdown looks okay -- does not have the slight hesitation in the current rise observed for the reference shot Pressure at breakdown is 0.06 mT. No problems from DNB which opened on this shot. BR and BZ at t=0 are identical to the reference shot 002. Plasma. 003. Plasma.Turned on Argon for Rice/Rotation 004. Plasma. 005. Plasma. Disruption at 0.8 s. Increased Ar for Rice/Rotation. Ar not the cause of disruption. 006. Fizzle Pressure is slightly lower. BZ and BR are unchanged from the reference shot or from the previous shot. There was a pause of about an hour before this shot. During that time, there was RF vacuum conditioning which may have induced the fizzle. 007. Plasma. 008. Plasma. 009. Plasma 010. Plasma. Disrupted at 1.3 s 011. Plasma. Attempted to move RXU out by 5 cm. ZXU up by 5 cm. Recommended by Brain to reduce the midplane pressure. ZXU responded as intended. RXU was moved too far. The midplane pressure was not reduced. 012. Plasma. Some correction applied to RXU but noticed that EF1_U was at its current limit. 013. Plasma Reverted to shot 009 014. Plasma 015. Plasma. Disruption at t=0.88 016. Plasma. Disruption at 1 s. 017. Plasma. Disruption at 1.2 s. |
| Session Leader Comments | |||
| Dec 7 2000 09:37:47:873AM | 1001207001 | Steve Wukitch | 001 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: plasma max faults from #4 next shot: retune and try again |
| Dec 8 2000 10:45:40:123AM | 1001207001 | Steve Wukitch | 001 request: reload 1001207017 BT=5.2 T, Ip=0.8 MA, nl_04~1e20 m^-2 J ramp to 1 MW [.6,1.4] sec result: plasma J3: 0.5 MW 3 faults J4: 0.5 MW 3 faults + reflected power spikes observed on pci data (200 kHz) #3 and #4 |
| Dec 7 2000 09:50:33:717AM | 1001207002 | Steve Wukitch | 002 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: plasma max faults from #4 next shot: retune and try again |
| Dec 7 2000 12:57:14:483PM | 1001207003 | Steve Wukitch | 003 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: plasma max faults from #4 |
| Dec 7 2000 12:57:32:750PM | 1001207004 | Steve Wukitch | 004 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: plasma max faults from #4 but ran longer reflected power suddenly jumps at 0.615 sec on #4 does not disappear with higher power - glow next shot: turn on harder (<1 msec) |
| Dec 7 2000 12:58:34:763PM | 1001207005 | Steve Wukitch | 005 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: plasma - early disruption 0.86 sec J4 max faulted again appears that the phase feedback is oscillating!? appears that the DC2 calibration factor is off since 003 |
| Dec 7 2000 12:58:53:357PM | 1001207006 | Steve Wukitch | 006 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: fizzle |
| Dec 7 2000 01:28:41:310PM | 1001207007 | Steve Wukitch | 007 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= 1 MW [0.6,1.4] sec result: plasma J3 0.6 MW, 3 faults J4 0.6 MW, max faults by end of pulse - much improved + phase was -0.2pi between 2-3 (needs to be 0) reduce from 77 deg to 50 deg for next shot |
| Dec 7 2000 01:40:26:560PM | 1001207008 | Steve Wukitch | 008 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2 MW [0.6,1.4] sec result: plasma J3 0.95 MW, 3 faults J4 0.9 MW, max faults by end of pulse - still improving + phase was -0.2pi between 2-3 at a phase setting of 50 deg. |
| Dec 7 2000 01:59:50:530PM | 1001207009 | Steve Wukitch | 009 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2 MW [0.6,1.4] sec result: plasma J3 0.95 MW, 6 faults J4 0.9 MW, 6 faults next shot: raise power to 1.2 MW |
| Dec 7 2000 03:08:30:357PM | 1001207010 | Steve Wukitch | 010 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2 MW [0.6,1.4] sec result: plasma, H-mode, disrupted ~1.32 sec J3 1.0 MW, 6 faults J4 1.1 MW, 6 faults |
| Dec 7 2000 03:14:00:670PM | 1001207011 | Steve Wukitch | 011 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2 MW [0.6,1.4] sec result: plasma changed upper triangularity from 0.4 to 0.25 J3 MW, max faults J4 MW, max faults upper antenna tiles are very bright |
| Dec 7 2000 03:14:44:530PM | 1001207012 | Steve Wukitch | 012 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2 MW [0.6,1.4] sec result: plasma changed upper triangularity from 0.4 to 0.25 J3 MW, max faults J4 MW, max faults upper antenna tiles are very bright - efit suggests we are rubbing the plasma against the antenna protection tiles raise upper triangularity to 010 value of 0.4 |
| Dec 7 2000 04:10:39:607PM | 1001207013 | Steve Wukitch | 013 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2 MW [0.6,1.4] sec result: plasma J3 1.15 MW, max faults by end J4 1.3 MW, one fault next shot: try short high power pulse at start of RF |
| Dec 7 2000 04:10:58:530PM | 1001207014 | Steve Wukitch | 014 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 3.5 MW [0.6,1.4] sec result: plasma J3 1.6 MW, max faults by end J4 1.7 MW, one fault Having injections from top front tiles like we had with E-port Is the high neutral pressure the problem? |
| Dec 8 2000 09:24:57:623AM | 1001207015 | Steve Wukitch | 015 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 3.0 MW [0.6,1.4] sec result: plasma, early disruption - injections from antenna J3 1.5 MW, 5 faults J4 1.5 MW, 4 faults |
| Dec 8 2000 09:30:37:780AM | 1001207016 | Steve Wukitch | 016 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2.5 MW [0.6,1.4] sec result: plasma, H-modes early disruption - injections from antenna J3 1.2 MW, 3 faults J4 1.3 MW, 3 faults |
| Dec 8 2000 10:44:57:217AM | 1001207017 | Steve Wukitch | 017 request: 5.2 T, Ip=0.8 MA, nl_04~1e20 J= ramp to 2.5 MW [0.6,1.4] sec result: plasma J3 1.2 MW, 3 faults J4 1.3 MW, 3 faults |
| Physics Operator Comments | |||
| Dec 7 2000 08:24:56:607AM | Bill Rowan | Engineering setup and run plan for Thursday 07 Dec 2000. MP #268 RF conditioning Session leaders: Wukitch/Boivin Physics operator: Rowan ------------------------------------------------------------------------------- Engineering setup: ECDC in D2 for 2 hours before the run. Power systems as on 1001206010. 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 Enable the following gate valves: ECE, VUV, Beast, DNB Run starts at 09:00 and ends at 17:00. ------------------------------------------------------------------------------- RF Setup: XMTRs 1,2,3, and 4 should be made ready by 8:00 (run-on). ------------------------------------------------------------------------------- Run Plan: Further tests of J-port performance as a four-strap. Re-load a late shot from yesterday (0.8 MA, 5.3 T, NL_ZMETER). Fire J-port into plasma. During the day we may raise the density, and if everything works well, we may eventually the current. | |
| Dec 7 2000 08:44:52:610AM | Bill Rowan | Started PCS Loaded shot from 1001206010 Load/Clean with this result Load at 7-Dec-2000 08:32:30.00 Did a cold start 7-DEC-2000 08:36:30.15 doing TCL *************** END COLDSTART ****************** | |
| Dec 7 2000 09:13:59:983AM | Bill Rowan | SPANNA crashed. Reloaded shot 1001206010 Load/Clean | |
| Dec 7 2000 09:32:33:967AM | 1001207001 | Bill Rowan | oo1. Plasma. Full length. Disrupted during the ramp down at 1.8 s. Breakdown looks okay -- does not have the slight hesitation in the current rise observed for the reference shot Pressure at breakdown is 0.06 mT. No problems from DNB which opened on this shot. BR and BZ at t=0 are identical to the reference shot |
| Dec 7 2000 09:37:16:590AM | 1001207001 | Bill Rowan | Next shot. No changes |
| Dec 7 2000 09:51:46:340AM | 1001207002 | Bill Rowan | 002. Plasma. As previous shot. Next shot. Turned Argon on for Rotation/Rice |
| Dec 7 2000 10:05:46:670AM | 1001207003 | Bill Rowan | 003. Plasma . As previous shot. |
| Dec 7 2000 10:24:53:797AM | 1001207003 | Bill Rowan | 003. Plasma . As previous shot. Next shot. No changes |
| Dec 7 2000 10:35:30:687AM | 1001207004 | Bill Rowan | 004. Plasma. As previous shot. |
| Dec 7 2000 10:47:16:920AM | 1001207004 | Bill Rowan | Next shot. Increased the Argon pulse by 4 ms at request of rotation rice |
| Dec 7 2000 11:05:11:750AM | 1001207005 | Bill Rowan | 005. Plasma. Disruption at 0.8 s |
| Dec 7 2000 11:27:33:890AM | 1001207005 | Bill Rowan | Pause after this shot for RF. |
| Dec 7 2000 12:39:15:827PM | 1001207005 | Bill Rowan | Next shot. No changes. |
| Dec 7 2000 12:55:09:357PM | 1001207006 | Bill Rowan | 006. Fizzle |
| Dec 7 2000 01:00:08:500PM | 1001207006 | Bill Rowan | Next shot. Add 1 ms to the prefill |
| Dec 7 2000 01:11:58:890PM | 1001207007 | Bill Rowan | 007. Plasma. Similar to 005 |
| Dec 7 2000 01:16:16:687PM | 1001207007 | Bill Rowan | Next shot: No changes |
| Dec 7 2000 01:34:17:967PM | 1001207008 | Bill Rowan | 008. Plasma. |
| Dec 7 2000 01:40:36:843PM | 1001207008 | Bill Rowan | 008. Plasma. Next shot. No changes. |
| Dec 7 2000 02:05:18:437PM | 1001207009 | Bill Rowan | 009. Plasma Next shot: no changes |
| Dec 7 2000 02:48:04:043PM | 1001207011 | Bill Rowan | 011. Plasma. ZXU is as intended. RXU was moved too far. Next shot: Mode RXU in by 2 cm. |
| Dec 7 2000 03:08:35:937PM | 1001207012 | Bill Rowan | 012. Plasma Current limit on EF1_U Next shot: Reverted to 009. |
| Dec 7 2000 03:41:46:997PM | 1001207013 | Bill Rowan | 013. Plasma Next shot: No changes |
| Dec 7 2000 04:02:42:623PM | 1001207014 | Bill Rowan | 014. Plasma Next shot: No changes |
| Dec 7 2000 04:29:20:483PM | 1001207015 | Bill Rowan | 015. Plasma. Disruption at t=0.88 s Next shot: No changes |
| Dec 7 2000 04:50:22:123PM | 1001207016 | Bill Rowan | 016. Plasma Disruption at 1 s Next shot. No changes |
| Dec 7 2000 05:01:35:653PM | 1001207017 | Bill Rowan | 017. Plasma. Disruption at 1.2 s. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:22:44:450AM | Plasma | Ok | |
| 2 | 09:39:34:810AM | Plasma | Ok | |
| 3 | 09:59:32:000AM | Plasma | Ok | |
| 4 | 10:25:34:200AM | Plasma | Ok | |
| 5 | 10:49:33:013AM | Plasma | Ok | |
| 6 | 12:47:14:717PM | Plasma | Ok | |
| 7 | 01:03:12:200PM | Plasma | Ok | |
| 8 | 01:28:27:997PM | Plasma | Ok | |
| 9 | 01:50:33:700PM | Plasma | Ok | |
| 10 | 02:14:45:200PM | Plasma | Ok | |
| 11 | 02:37:46:030PM | Plasma | Ok | |
| 12 | 03:01:19:327PM | Plasma | Ok | |
| 13 | 03:25:39:543PM | Plasma | Ok | |
| 14 | 03:48:41:920PM | Plasma | Ok | |
| 15 | 04:11:57:170PM | Plasma | Ok | |
| 16 | 04:34:11:450PM | Plasma | Ok | |
| 17 | 04:58:32:200PM | Plasma | Ok | |