| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Bruce Lipschultz |
| Physics operator(s): | John Goetz |
| Engineering operator(s): | Frank Silva,Vinny Bertolino |
| Engineering Operator Run Comment |
| silva/bertolino |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:12:163PM |
| Author: To Be Determined |
| run 950202 Engineering operator: F. Silva Physics operator J. Goetz Session leader BLip This run was a continuation of mini-proposals 39 ('effect of geometry on divertor detachment') with a sidetrack to delve into some details of mp #81 - 'effect of strike point position on the extent of detachment'. The run was very successful. We were able to make small changes in nebar and see the corresponding changes in the extent of detachment. This was done at both 800 kA and 500 kA. We also switched to flat-plate divertor geometry late inthe run and using the same density steps explored detachment and it;'s extent there. Operationally, we found that to better trust the probe output it was useful to sweep the strike point around some nominal position for a fixed density. This proved very useful. There is a fairly narrow density range from the onset of detachment until the detachment reaches the nose of the outer divertor. At 800kA this window is between nl04=1. and 1.5 e20. We did not push above that density to see what it took to detach probe 8 in all cases. The comparison of flat-plate and inclined-plate divertor continues. At 500 kA the detachment threshold for the inclined and flat-plate geometries were nl04=0.5 and 0.9e20 respectively, so higher for flat-plate. This is similar to the 800kA results of Tuesday and the previous flat-plate run where the inclined plate/slot had a threshold of nl04=1.0e20 and the flat-plate at nl04~1.8e20. The shot description follows: shot 1: one power supply not taken off of PLC control. shot 2: Fine shot at nl04= 0.7e20. Probe will fire the next shot. shot 4: Shot is fine but apparently the edge::probe tree was not turned back on. We will wait for the dust to settle here and run this shot again!!! shot 5: shot fine except for Moly peak early in time. We are still having probe problems. One more time with feeling. shot 6: probe went in fine, nl04=0.7. Next shot nl04=0.9 shot 7: fine shot at nl04=0.9e20. probe scan fine as well. next shot at nl04=1.1e20. shot 8: very strange shot. The footprint of Isat on the outer divertor shows a major change at ~.85 sec. There appears to be a MARFE during most of the shot that doesn't slip into the divertor until then. The MARFE apparently causes most of the divertor to apper to be detached. shot 9: The shot went fine but no data because the camac did not initialize. TWF has fixed this problem and we will redo the shot. shot 10: Finally we got the nl04=1.1e20. Probe went in fine and we will raise the density for the next shot. Looks like the peak pressure has moved to probe 4 so detachment at least on probes 2 & 3. shot 11: Finally we got the nl04=1.3e20. Detachment even further up the plate to somewhere around probe 6-7. Probe went in fine and we will raise the density for the next shot. shot 12: fizzle, gas too high shot 13: nl04=1.5e20. possibly some detachment on probe 8. shot 14: We decided to sweep the strike point. This went fine. nl04=1.1e20. Peak in pressure profile moves up and down the plate. next shot same sweep but nl04=1.3e20. shot 15: sweep of strike point with nl04=1.3e20. next shot sweep a little further (to probe 5) and back to nl04=1.1e20. shot 16: Very nice sweep with nl04=1.1e20. We see the peak in Isat move up to probe 5. shot 17: 500 kA, nl04=1.1e20. This shot has detachment all the way up the inclined plate through probe 8. shot 18: nl04=0.9e20, swept strike point. Detachment through probe 7. lower the density more on the next shot. shot 19: nl04=0.7e20. This shot is probably not useful. The outer gap is too small (5mm) and there is an event at .82 sec which changes the profile in the divertor. We will repeat this shot. shot 20: Better but outer gap too small still. We will repeat once again - nl04=0.7e20. shot 21: still settling the gap. Also it appears that the Ar level in the machine is too high - possible inner seal leak. We will repeat this shot once again without Ar and hopefully better gap control. Still at nl04=0.7e20. shot 22: This shot looks pretty good at nl04=0.7e20. We will lower the density on the next shot. Ar off for this one and next. Detachment midway upthe divertor plate. shot 23: No detachment at nl04=0.5e20. Gaps are good and we will keep the Ar off until the end of this density scan. Next shot nl04=0.6e20. shot 24: nl04=0.6e20 to try to zero in on threshold better.There appears to be a slight amount of detachment on this shot. Back to repeat nl04=1.1e20 without Ar next shot. shot 25: detached up through probe 7. nl04=1.1e20. shot 26: nl04=0.9e20, detachment up through probe 7. next shot on to slot divertor. shot 27: tried to switch to slot w/ne04=1.1e20. However we don't seem to have moved the separatrix far enough. Detached up through probe 7. One more try for slot. shot 28: still didn't achieve 'slotness'. nl04=0.9e20. Strike point on probe 1 the whole shot. Next shot on to flat-plate. shot 29: flat-plate started ok but EF1 gave out so the plasma disrupted at .67 sec. Try again with probe as well. shot 30: We appeared to get the required sweep. However, the scanning probe is not able to reach this plasma at all times. nl04=0.9e20. We will try to hold the separatrix position more constant for the probe and repeatthe shot. There does not appear to be any detachment. shot 31: Flat-plate again ok at nl04=0.9e20. Injection at 0.85 sec which interrupts the probe scan. We will repeat and try to get the position of the plasma and probe more appropriate. shot 32: nl04=0.9e20, no injections. Probe went in and got 2 good scans. We will now go to higher density. shot 33: Very nice sweep. nl04=1.1e20. Looks like detachment on probe 8. However the probe was not properly enabled that shot - no FSP. shot 34: nl04 = 1.1e20, detachment and FSP made scan. We will go to lower density next shot to make sure we have the detachment threshold correct. shot 35: nl04=0.7e20, no detachment obvious. FSP scan went all right. However, the signals on probe 8 appear a little awry. We will repeat with slightly higher density. shot 36: good profile at probe 8 during sweep for nl04=0.8e20. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:53:083PM |
| Author: To Be Determined |
| Physics operator summary for 950202 EO: Silva/Bertilino PO: Goetz SL: Lipschultz Run 950202 was in support of Mini-Proposal #039 - Effect of Divertor Geometry on Detachment. The goal of this mini-proposal is to compare the effect of divertor geometry on the critical density for detachment and the characteristics of the detachment. Program for this run: - Setup a lower SN discharge with Ip=0.8MA, NL_04=0.7e20, and outer strike point on probe 2 - Raise density in shotwise steps of 0.2e20 to at least 1.5e20 - Change Ip to 0.5MA and repeat - Change to outer strike point sweeping about probe 8 and repeat This program was completely carried out (but only because slot operation was not an original goal of the experiment). See the Session Leader's summary to find out how this program was carried out and for preliminary results. Some things discovered today: 1) A very reliable day today. Plasmas were obtained on 34 of 36 shots. The dud was due to an engineering oversight and the fizzle was due to a slow current rise. Prior to the fizzle, the A_SIDE plenum pressure was raised by 3PSIA and the current rise was slower than any other during the day. Lowering the voltage on the PG3 waveform by 3 volts allowed the run to continue uninterrupted. 2) With the line-density (NL_04) less than 0.7e20, the plasmas ramp all the way down. With the density above this level, the plasma will disrupt because of a shark fin. The time of disruption moves earlier with an increase in the density. Somehow, the density needs to be removed more quickly to prevent these fins. On a related note, lowering the proportional gain on the fast ZCUR wire to 3. helps control a oscillation in the z-position at 'high' densities. 3) Once again there was a mystery shot in which the plasma was being fueled by the inner wall. From H-alpha reticon data, it appears that a MARFE was trapped on the inner wall. When the MARFE drops into the divertor, fueling returns to normal and all is well with the controllers. In an attempt to smooth out the CLEARIN, the turn-on of the integral gain was delayed until 0.45sec. This indeed did remove the overshoot in the inner gap, but seems to have trapped the MARFE on the inner wall. Turning on the integral gain at 0.375 solved this problem for the rest of the run. 4) The STRKPSI controller was used extensively today with varying reference points. Strike point sweeping was also performed today using the same controller. Operation with constant outer strike point at probe 2, and sweeping about probe 2 and probe 8 were successful. These sweeps were done at 0.8 and 0.5MA. An attempt to operate with a slot divertor was unsuccessful. Programming for -.015 with probe 1 as the reference point was employed together with asking for a negative RXL. A suggestion to play with the EF4 was not attempted due to time limitations. 5) Much twiddling was done with CLEARIN, RCUR, and the x-point controllers to try and compensate for the sweeping of the strike point in order to give the FSP a stationary target plasma. The STRKPSI controller wins out at the expense of the gaps and the x-point location. So I would recomment against using these shots unless the Session Leader insists upon everything being constant. 6) A very difficult time dealing with hard x-rays today. Raising the fill seemed to help the problem, while fiddling with the early gas did not. The run began with the fill pressure at 1.5e-5 and ended at 2.0e-5. After shot 028, the hards were gone with no further tweaking necessary (or for that matter, no tweaking stopped the hards). The vacuum shop was chasing an argon leak all day, and whether or not this argon was the hard x-ray producer is not at all clear. Engineering, computing, and diagnostics today: Engineering problems today include the EF1L going to zero demand during the shot (leading to disruptions shots 003 & 029) and the EF2's not being under hybrid control. IGOR ran well today, there were no hangs due to the speed of the servers. However, SCSI CAMAC suffered a vapor lock and all SCSI data were lost on shot 009. The batch queues died after shot 008 and most analysis jobs didn't run. Diagnostics ran well today. Scorecard: 36 shots = 34 plasmas + 1 fizzles + 1 p.s. dud Shot summary for Run 950202 Reload of 950131016 Changes to shot 950131016: reference on STRKPSI(W12) = (0.624,-0.540) NL_04 drawn to 0.7e20 from 0.4 to 1.0 sec CLEARIN extended to 1.05sec RXL = -.005 Shot change result ____ _____ ______ 1 see above dud - EF2's under PLC control 2 no changes plasma - all the way down strike point and gaps o.k. 3 enable B_SIDE_UPPER & B_SIDE_LOWER plasma - disr. @ 0.6 Ip rolls over @ 0.58 as does OH1 current 4 raise PG3 early plasma - all the way down strike point and gaps o.k. tree troubles for FSP 5 raise PG3 some more in segs 1 & 2 plasma - all the way down strike point and gaps o.k. 6 raise PG3 some more in segs 1 & 2 plasma - all the way down some hards; moly down strike point o.k. 7 NL_04=0.9e20; P_CLEARIN=9.; more PG3 plasma - disr. @1.52 still some hards 8 P_0=1.7e-5; NL_04=1.1e20; delay CLEARIN plasma - disr. @ 1.5 I gain until 0.45 RXL far inside this shot 9 CLEARIN I gain on @ 0.375 plasma - disr. @ 1.4 no SCSI CAMAC - missing data 10 physics P gain on RXL=36 plasma - disr. @ 1.42 gaps & strike o.k. better on RXL 11 physics P gain on RXL=48; NL_04=1.3e20 plasma - disr. @ 1.43 gaps & strike o.k. RXL = 0.56->0.54 12 add 3 PSIA to A_SIDE; NL_04=1.5e20 fizzle - current rise is slow 13 lower PG3 in seg 1 plasma - disr. @ 1.43 lots of hards hesitation on startup 14 NL_04=1.1e20; raise PG3 in seg 1 plasma - disr. @ 1.44 STRKPSI(W12)=-2e-3@0.5;+1.5e-3@.75;0@1. good sweep of strike; gaps o.k. 15 NL_04=1.3e20; raise PG3 in seg 1 plasma - disr. @ 1.4 sweep, gaps, & RXL o.k. still lots o' hards 16 NL_04=1.1e20; more PG3 @ .03 plasma - disr. @ 1.45 STRKPSI(W12)=-2e-3@.6;+3e-3@.82;0@1.0 some hards remain 17 Ip=0.5MA; more PG3 @ .03 plasma - disr. @ 1.19 right gap changing; good sweep 18 P_0=1.8e-5; NL_04=0.9e20 plasma - disr. @ 1.21 STKRPSI(W12)=-1e-3 @ 1. right gap changing; good sweep 19 NL_04=0.7e20; more PG3 @ 0.08 plasma - disr. @ 1.38 RCUR=0.655->0.657->0.655 RCUR progr. wrong 20 RCUR=0.653->0.649->0.653 plasma - disr. @ 1.36 P_0=1.9e-5 one burst of hards outer gap steady at 1.4 21 RCUR=0.65->0.646->0.65 plasma - disr. @ 1.38 P_0=2.0e-5 still hards o.gap=1.6->2->1.6; i.gap=1.4 22 RCUR=0.648->0.646->0.648; CLEARIN=0. plasma - all the way down fewer hards o.gap=2; i.gap=1.7->1.5 23 NL_04=0.5e20; RCUR=0.648 plasma - all the way down gaps, sweep o.k. 24 NL_04=0.6e20 plasma - all the way down good target plasma 25 NL_04=1.1e20 plasma - disr. @ 1.02 plasma edge moving by a few mm 26 NL_04=0.9e20 plasma - disr. @ 1.45 o.k. target 27 NL_04=1.1e20 plasma - disr. @ 0.96 STRKPSI(W12)=-1.5e-3 from 0.5 to 1. not a slot divertor STRKPSI(W12)->(RSOUT=.626,ZSOUT=-.552) 28 NL_04=0.9e20; RXL=-.01 plasma - disr. @ 1.47 not a slot 29 load STRKPSI(W12) from 950131027 plasma - disr. @ 0.68 RXL=0->-.002 @ 1sec EF1L goes bad @ 0.6 30 no changes plasma - disr. @ 1.42 outer and inner gaps changing 31 RCUR=.648->.645->.648 plasma - disr. @ 1.4 STRKPSI=-.005@.6; +.002@.75; -.005@.95 still moving too much for FSP 32 add point in CLEARIN=+.01 @ .75sec plasma - disr. @ 1.36 still moving but FSP got in 33 NL_04=1.1e20; P=3 @ 0.8 on ZCUR(W3) plasma - disr. @ 1.29 P gain change reduced osc. 34 P=3 @ 0.5 on ZCUR(W3) plasma - disr. @ 1.31 P gain change worked well 35 NL_04=0.7e20 plasma - all the way down 36 NL_04=0.8e20 plasma - disr. @ 1.42 |
| Session Leader Comments | |||
| Feb 2 1995 08:27:15:930AM | Bruce Lipschultz | run 950202
Engineering operator: F. Silva Physics operator J. Goetz Session leader BLip This run will be a continuation of mini-proposals 39 ('effect of geometry on divertor detachment')with a sidetrack to delve into some details of mp #81 - 'effect of strike point position on the extent of detachment'. The plan is to start out at 800 kA with the outer strike point on probe 2 and constant low density (nl04=0.7e20) and increase the density by 0.2 each shot for at least 5 shots. If this is successful we will change the plasma current to 500 kA and repeat. | |
| Feb 2 1995 08:49:03:270AM | 950202001 | Bruce Lipschultz | shot 1: dud because EF2 not turned on
|
| Feb 2 1995 08:50:57:900AM | 950202002 | Bruce Lipschultz | shot 2: Fine shot at nl04= 20.7e20. Probe will fire the next shot.
|
| Feb 2 1995 08:51:15:400AM | 950202002 | Bruce Lipschultz | shot 2: Fine shot at nl04= 0.7e20. Probe will fire the next shot.
|
| Feb 2 1995 09:25:41:400AM | 950202005 | Bruce Lipschultz | shot 5: shot fine except for Moly peak early in time. We are
still having probe problems. One more time with feeling. |
| Feb 2 1995 09:43:08:910AM | 950202006 | Bruce Lipschultz | shot 6: shot went in fine, nl04=0.7. Next shot nl04=0.9
|
| Feb 2 1995 09:54:46:450AM | 950202007 | Bruce Lipschultz | shot 7: fine shot at nl04=0.9e20. probe scan fine as well. next
shot at nl04=1.1e20. |
| Feb 2 1995 10:21:17:050AM | 950202008 | Bruce Lipschultz | shot 8: very strange shot. The footprint of Isat on the outer divertor
shows a major change at ~.85 sec. There appears to be a MARFE during most of the shot that doesn't slip into the divertor until then. The MARFE apparently causes most of the divertor to apper to be detached. |
| Feb 2 1995 10:40:35:850AM | 950202009 | Bruce Lipschultz | shot 9: The shot went fine but no data because the
camac did not initialize. TWKF has fixed this problem and we will redo the shot. |
| Feb 2 1995 10:51:03:640AM | 950202010 | Bruce Lipschultz | shot 10: Finally we got the nl04=1.1e20. Probe went in fine and we will
raise the density for the next shot. |
| Feb 2 1995 10:52:33:990AM | 950202010 | Bruce Lipschultz | shot 10: Finally we got the nl04=1.1e20. Probe went in fine and we will
raise the density for the next shot. |
| Feb 2 1995 11:01:10:970AM | 950202011 | Bruce Lipschultz | shot 11: Finally we got the nl04=1.3e20. Detachment even further up the
plate to somewhere around probe 6-7. Probe went in fine and we will raise the density for the next shot. |
| Feb 2 1995 11:22:49:070AM | 950202012 | Bruce Lipschultz | shot 12: fizzle, gas too high
|
| Feb 2 1995 11:32:02:870AM | 950202013 | Bruce Lipschultz | shot 13: nl04=1.5e20. Lots of hard x-rays. There does not seem to be much
of a difference in detachment profile from the next lower density shot (11, nl04=1.3e20). We will have to wait for processed data. Next shot we will go back to nl04=1.1e20 and sweep the strike point around probe 2 (from probe 1 to 3 and back to 2) to better understand the profile shape on the divertor. |
| Feb 2 1995 11:33:22:840AM | 950202013 | Bruce Lipschultz | shot 13: nl04=1.5e20. Lots of hard x-rays. There does not seem to be much
of a difference in detachment profile from the next lower density shot (11, nl04=1.3e20). We will have to wait for processed data. Next shot we will go back to nl04=1.1e20 and sweep the strike point around probe 2 (from probe 1 to 3 and back to 2) to better understand the profile shape on the divertor. |
| Feb 2 1995 11:50:30:380AM | 950202014 | Bruce Lipschultz | shot 14: sweep of strike point went fine. nl04=1.1e20. Peak in
pressure profile moves up and down the plate. next shot same sweep but nl04=1.3e20. |
| Feb 2 1995 11:58:27:960AM | 950202015 | Bruce Lipschultz | shot 15: seep of strike point with nl04=1.3e20. next shot sweep a little
further (to probe 5) and back to nl04=1.1e20. |
| Feb 2 1995 12:24:20:240PM | 950202016 | Bruce Lipschultz | shot 16: Very nice sweep with nl04=1.1e20. We see the peak in Isat move
up to probe 5 from probe 4 and back. |
| Feb 2 1995 12:35:48:480PM | 950202017 | Bruce Lipschultz | shot 17: 500 kA, nl04=1.1e20. This shot has detachment all the way up
the inclined plate. |
| Feb 2 1995 12:45:44:810PM | 950202018 | Bruce Lipschultz | shot 18: nl04=0.9e20, swept strike point. Detachment through probe 7.
lower the density more on the next shot. |
| Feb 2 1995 12:58:23:100PM | 950202019 | Bruce Lipschultz | shot 19: nl04=0.7e20. This shot is probably not useful. The outer gap is
too small (5mm) and there is an event at .82 sec which changes the profile in the divertor. We will repeat this shot. |
| Feb 2 1995 01:15:28:620PM | 950202020 | Bruce Lipschultz | shot 20: Better but outer gap too small still. We will repeat once
again - nl04=0.7e20. |
| Feb 2 1995 01:29:07:600PM | 950202021 | Bruce Lipschultz | shot 21: still settling the gap. Also it appears that the Ar level in
the machine is too high - possible inner seal leak. We will repeat this shot once again without Ar and hopefully better gap control. Still at nl04=0.7e20. |
| Feb 2 1995 01:44:01:390PM | 950202022 | Bruce Lipschultz | shot 22: This shot looks pretty good at nl04=0.7e20. We will lower the
density on the next shot. Ar off for this one and next. |
| Feb 2 1995 01:56:51:660PM | 950202023 | Bruce Lipschultz | shot 23: No detachment at nl04=0.5e20. Gaps are good and we will keep
the Ar off until the end of this density scan. Next shot nl04=0.6e20. |
| Feb 2 1995 02:13:47:050PM | 950202024 | Bruce Lipschultz | shot 24: nl04=0.6e20 to try to zero in on threshold better.There appears
to be a slight amount of detachment on this shot. Back to repeat nl04=1.1e20 without Ar next shot. |
| Feb 2 1995 02:27:25:420PM | 950202025 | Bruce Lipschultz | shot 25: detached up through probe 7. nl04=1.1e20.
|
| Feb 2 1995 02:38:20:630PM | 950202026 | Bruce Lipschultz | shot 26: nl04=0.9e20, detachment up through probe 7. next shot on to
slot divertor. |
| Feb 2 1995 03:04:44:670PM | 950202027 | Bruce Lipschultz | shot 27: tried to switch to slot w/ne04=1.1e20. However we don't
seem to have moved the separatrix far enough. Detached up through probe 7. One more try for slot. |
| Feb 2 1995 03:33:39:360PM | 950202029 | Bruce Lipschultz | shot 29: flat-plate started ok but EF1 gave out so the plasma disrupted
at .67 sec. Try again with probe as well. |
| Feb 2 1995 03:54:46:630PM | 950202030 | Bruce Lipschultz | shot 30: We appeared to get the required sweep. However, the scanning
probe is not able to reach this plasma at all times. nl04=0.9e20. We will try to hold the separatrix position more constant for the probe and repeatthe shot. There does not appear to be any detachment. |
| Feb 2 1995 04:02:57:560PM | 950202031 | Bruce Lipschultz | shot 31: Flat-plate again ok at nl04=0.9e20. Injection at 0.85 sec which
interrupts the probe scan. We will repeat and try to get the position of the plasma and probe more appropriate. |
| Feb 2 1995 04:17:08:950PM | 950202032 | Bruce Lipschultz | shot 32: nl04=0.9e20, no injections. Probe went in and got 2 good
scans. We will now go to higher density. |
| Feb 2 1995 04:34:46:140PM | 950202033 | Bruce Lipschultz | shot 33: Very nice sweep. nl04=1.1e20. Looks like detachment on
probe 8. However the probe was not properly enabled that shot - no FSP. |
| Feb 2 1995 04:49:38:570PM | 950202034 | Bruce Lipschultz | shot 34: nl04 = 1.1e20, detachment and FSP made scan. We will go to
lower density next shot to make sure we have the detachment threshold correct. |
| Feb 2 1995 05:03:39:230PM | 950202035 | Bruce Lipschultz | shot 35: nl04=0.7e20, no detachment obvious. FSP scan went all right.
However, the signals on probe 8 appear a little awry. We will repeat with slightly higher density. |
| Feb 2 1995 06:08:50:480PM | 950202036 | Bruce Lipschultz | shot 36: good profile at probe 8 during sweep for nl04=0.8e20.
|
| Physics Operator Comments | |||
| Feb 2 1995 08:10:14:270AM | John Goetz | Run 950202
MiniProposal #039 - Effect of Divertor Geometry on Detachment Run Plan: -develop lower SN discharge with outer strike-point located near probe 2 and with Ip=0.8MA and NL_04=0.7e20 -raise density in steps of 0.2e20 until at least 1.5e20 -change Ip to 0.5MA and repeat -develop lower SN discharge with outer strike-point sweeping about probe 8 and repeat the above steps | |
| Feb 2 1995 08:37:23:430AM | 950202001 | John Goetz | Shot 950202001:
Cold start hybrid - all matrices respond Load from 950131016 and make these changes: reference on STRKPSI(W12) = (rsout=0.624,zsout=-0.534) NL_04=0.7e20 RXL=-.005 CLEARIN extended to 1.05sec Results: DUD - EF2's under PLC control |
| Feb 2 1995 08:47:49:980AM | 950202002 | John Goetz | Shot 950202002:
no changes Results: plasma - all the way down strike-point fairly solid on probe 2 gaps o.k. |
| Feb 2 1995 09:09:39:250AM | 950202003 | John Goetz | Shot 950202003:
enable B_SIDE_UPPER enable B_SIDE_LOWER Results: disruption @ 0.6 Ip begins to roll over @ 0.58 coincidence with a change in OH1 current |
| Feb 2 1995 09:11:39:270AM | 950202004 | John Goetz | Shot 950202004:
raise PG3 early to combat large moly influx Results: plasma - all the way down strike point o.k. - gaps o.k. troubles with tree for FSP control |
| Feb 2 1995 09:27:00:520AM | 950202005 | John Goetz | Shot 950202005:
raise PG3 some more in segs 1 & 2 to combat large moly influx Results: plasma - all the way down strike point and gaps are o.k. moly down just a bit still no FSP |
| Feb 2 1995 09:42:59:830AM | 950202006 | John Goetz | Shot 950202006:
raise PG3 still more in segs 1 & 2 to combat large moly influx Results: plasma - all the way down moly down, but some hards around strike point o.k. - inner gap becomes 1 mm smaller thru shot |
| Feb 2 1995 09:54:40:940AM | 950202007 | John Goetz | Shot 950202007:
raise PG3 still more in segs 1 & 2 to combat hards NL_04=0.9e20 P_CLEARIN=9. Results: plasma - disr. @ 1.52 still some hards strike point o.k. |
| Feb 2 1995 10:25:04:460AM | 950202008 | John Goetz | Shot 950202008:
P_0=1.7e-5 NL_04=1.1e20 delay CLEARIN I gain until 0.45 Results: plasma - disr. @ 1.5 MARFE does not drop into divertor until 0.84 - very wierd shot lower x-point is riding the inner nose |
| Feb 2 1995 10:39:53:830AM | 950202009 | John Goetz | Shot 950202009:
CLEARIN I gain until 0.375 Results: Plasma - disr. @ 1.4 no SCSI CAMAC - missing many pieces of data nice gaps and no trapped MARFE |
| Feb 2 1995 10:48:47:780AM | 950202010 | John Goetz | Shot 950202010:
Physics P gain on RXL = 36 Results: plasma - disr. @ 1.42 nice shot gaps o.k. - strikepoint o.k. a bit better on RXL |
| Feb 2 1995 11:01:43:370AM | 950202011 | John Goetz | Shot 950202011:
NL_04 = 1.3e20 Physics P gain on RXL = 48 Results: plasma - disr. @ 1.43 gaps and strike o.k. RXL = 0.56 -> 0.54 |
| Feb 2 1995 11:17:28:340AM | 950202012 | John Goetz | Shot 950202012:
NL_04 = 1.5e20 add 3PSIA D2 to A_SIDE Results: fizzle - current rises too slowly must have been too much gas from the increase in pressure |
| Feb 2 1995 11:33:06:250AM | 950202013 | John Goetz | Shot 950202013:
lower PG3 in segment 1 Results: plasma - disr. @ 1.43 lots of hards hesitation on ramp-up @ .015 gaps & strike o.k. |
| Feb 2 1995 11:46:49:640AM | 950202014 | John Goetz | Shot 950202014:
NL_04 = 1.1e20 raise PG3 just a bit in seg 1 sweep outer strike; STRKPIS(W12) = -2e-3@0.5; +1.5@0.75; 0@1.0 Results: plasma - disr. @ 1.44 fewer hards - but they're still there good sweep of strike; gaps o.k. |
| Feb 2 1995 11:57:46:800AM | 950202015 | John Goetz | Shot 950202015:
NL_04 = 1.3e20 raise first two points of PG3 just a bit in seg 1 Results: plasma - disr. @ 1.4 good sweep of strike; gaps o.k.; RXL o.k. still plenty of hards |
| Feb 2 1995 12:30:51:980PM | 950202016 | John Goetz | Shot 950202016:
NL_04 = 1.1e20 raise PG3 around .03sec Results: plasma - disr. @ 1.45 hards - but fewer good strike sweep |
| Feb 2 1995 12:31:46:670PM | 950202017 | John Goetz | Shot 950202017:
Ip=0.5MA more PG3 @ .03 Results: plasma - disr. @ 1.19 hards - but fewer good strike sweep right gap decreases, then increases |
| Feb 2 1995 12:44:30:430PM | 950202018 | John Goetz | Shot 950202018:
P_0=1.8e-5 NL_04 = 0.9e20 STRKPSI(W12) = -1e-3 @ 1.0 Results: plasma - disr. @ 1.21 hards dump @ 0.1 outer gap shaking |
| Feb 2 1995 01:01:43:030PM | 950202019 | John Goetz | Shot 950202019:
NL_04 = 0.7e20 more PG3 @ 0.08 RCUR=0.655->0.657->0.655 to correct outer gap drift Results: plasma - disr. @ 1.38 wrong RCUR programming - plasma moved closer to FSP |
| Feb 2 1995 01:13:23:010PM | 950202020 | John Goetz | Shot 950202020:
RCUR=0.653->0.649->0.653 to correct outer gap drift P_0=1.9e-5 Results: plasma - disr. @ 1.36 outer gap ~ 1.4cm and fairly flat only one burst of hards |
| Feb 2 1995 01:28:25:570PM | 950202021 | John Goetz | Shot 950202021:
RCUR=0.65->0.646->0.65 to increase outer gap P_0=2.0e-5 Results: plasma - disr. @ 1.38 outer gap =1.6->2->1.6; inner gap = 1.4 sweep and strike o.k. |
| Feb 2 1995 01:45:05:550PM | 950202022 | John Goetz | Shot 950202022:
RCUR=0.648->0.646->0.648 to increase outer gap CLEARIN = 0. Results: plasma - all the way down fewer hards outer gap 2.0 and flat - inner gap 1.7->1.5 |
| Feb 2 1995 01:56:21:350PM | 950202023 | John Goetz | Shot 950202023:
RCUR=0.648 NL_04 = 0.5e20 Results: plasma - all the way down fewer hards still gaps o.k.; sweep o.k.; good target for FSP |
| Feb 2 1995 02:09:32:530PM | 950202024 | John Goetz | Shot 950202024:
NL_04 = 0.6e20 Results: plasma - all the way down gaps, strike, target are o.k. |
| Feb 2 1995 02:27:32:810PM | 950202025 | John Goetz | Shot 950202025:
NL_04 = 1.1e20 Results: plasma - disr. @ 1.02 plasma boundary moving a few mm |
| Feb 2 1995 02:41:04:440PM | 950202026 | John Goetz | Shot 950202026:
NL_04 = 0.9e20 Results: plasma - disr. @ 1.45 o.k. target |
| Feb 2 1995 03:01:09:850PM | 950202027 | John Goetz | Shot 950202027:
NL_04 = 1.1e20 STRKPSI(W12)=-1.5e-3 from 0.5 to 1.0 STRKPSI(W12) reference -> (RSOUT=0.626,ZSOUT=-.552) Results: plasma - disr. @ .96 not a slot divertor |
| Feb 2 1995 03:19:36:060PM | 950202028 | John Goetz | Shot 950202028:
NL_04 = 0.9e20 RXL = -.01 Results: plasma - disr. @ 1.47 only a slot for a few msec |
| Feb 2 1995 03:32:29:370PM | 950202029 | John Goetz | Shot 950202029:
STRKPSI(W12) ref -> (RSOUT=.6144,ZSOUT=-.4367) load STRKPSI programming from segment 2 of 950131027 RXL = 0->-.002 @ 1sec Results: plasma - disr. @ 0.68 EF1L messes up @ 0.6sec (the same was true on 950202003, but was not noticed) |
| Feb 2 1995 03:48:54:250PM | 950202030 | John Goetz | Shot 950202030:
no changes Results: plasma - disr. @ 1.42 moly injections @ .35 & .45 outer gap 2->1.4->2; inner gap drooping good sweep of strike |
| Feb 2 1995 04:04:11:110PM | 950202031 | John Goetz | Shot 950202031:
RCUR=.648->.645->.648 strike sweep from -.005@.6 to +.002@.75 to -.005@.95 Results: plasma - disr. @ 1.4 moly inj. @ 0.85 plasma still moving quite a bit wrt FSP |
| Feb 2 1995 04:17:45:470PM | 950202032 | John Goetz | Shot 950202032:
add point in CLEARIN @ 0.75 to mimic strike sweep Results: plasma - disr. @ 1.36 still a moving target but FSP got in anyway |
| Feb 2 1995 04:33:57:910PM | 950202033 | John Goetz | Shot 950202033:
NL_04=1.1e20 P gain on ZCUR(W3) = 3 @ 0.8sec Results: plasma - disr. @ 1.29 P gain change helped stop the z-oscillation FSP did not fire |
| Feb 2 1995 05:00:57:010PM | 950202034 | John Goetz | Shot 950202034:
P gain on ZCUR(W3) = 3 @ 0.5sec Results: Plasma - disr. @ 1.31 P gain change on ZCUR(W3) works well FSP fired |
| Feb 2 1995 05:01:39:580PM | 950202035 | John Goetz | Shot 950202035:
NL_04=0.7e20 Results: Plasma - all the way down FSP fired |
| Feb 2 1995 05:09:47:760PM | 950202036 | John Goetz | Shot 950202036:
NL_04=0.8e20 Results: plasma - disrupts @ 1.42 strike sweep acceptable |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:24:16:590AM | Plasma | Ok | engineering goof, tmx on plc |
| 2 | 08:34:29:840AM | Plasma | Ok | no faults plasma |
| 3 | 08:48:27:520AM | Plasma | Ok | comm fault ef1l |
| 4 | 08:59:55:570AM | Plasma | Ok | no faults, plasma |
| 5 | 09:17:59:220AM | Plasma | Ok | no faults, plasma |
| 6 | 09:29:51:630AM | Plasma | Ok | |
| 7 | 09:42:48:990AM | Plasma | Ok | no faults, plasma |
| 8 | 09:55:21:620AM | Plasma | Ok | no faults |
| 9 | 10:25:30:100AM | Plasma | Ok | no faults, plasma |
| 10 | 10:40:08:950AM | Plasma | Ok | no faults, plasma |
| 11 | 10:52:25:380AM | Plasma | Ok | no faults plasma |
| 12 | 11:05:12:670AM | Plasma | Ok | no faults no bd |
| 13 | 11:19:00:510AM | Plasma | Ok | no faults plasma |
| 14 | 11:34:02:250AM | Plasma | Ok | no faults |
| 15 | 11:47:57:980AM | Plasma | Ok | no faults plasma |
| 16 | 12:01:36:740PM | Plasma | Ok | no faults plasma |
| 17 | 12:16:40:420PM | Plasma | Ok | no faults, plasma |
| 18 | 12:32:19:570PM | Plasma | Ok | no faults, plasma |
| 19 | 12:48:05:310PM | Plasma | Ok | no faults, plasma |
| 20 | 01:00:28:770PM | Plasma | Ok | no faults |
| 21 | 01:15:43:580PM | Plasma | Ok | no faults |
| 22 | 01:31:36:080PM | Plasma | Ok | no faults |
| 23 | 01:45:49:950PM | Plasma | Ok | no faults |
| 24 | 01:59:50:030PM | Plasma | Ok | no faults |
| 25 | 02:16:05:130PM | Plasma | Ok | no faults |
| 26 | 02:30:31:440PM | Plasma | Ok | no faults |
| 27 | 02:45:28:980PM | Plasma | Ok | oh2l comm fault after disruption |
| 28 | 03:03:03:160PM | Plasma | Ok | no faults |
| 29 | 03:22:33:940PM | Plasma | Bad | ef1l comm fault |
| 30 | 03:34:05:690PM | Plasma | Ok | no faults |
| 31 | 03:49:58:270PM | Plasma | Ok | no faults |
| 32 | 04:06:06:270PM | Plasma | Ok | no faults |
| 33 | 04:20:47:350PM | Plasma | Ok | no faults |
| 34 | 04:37:05:530PM | Plasma | Ok | no faults |
| 35 | 04:51:25:710PM | Plasma | Ok | no faults |
| 36 | 05:05:49:930PM | Plasma | Ok | no faults |