| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Jim Irby,Bruce Lipschultz |
| Physics operator(s): | Ian Hutchinson,Robert Granetz |
| Engineering operator(s): | Frank Silva,Bill Cochran |
| Engineering Operator Run Comment |
| Same start as 97061616/Cochran/Silva/Terry/Hutchinson |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:16:930PM |
| Author: To Be Determined |
| Run Summary for 970617 SL: Irby/Blip PO: Hutch/Grantez EO: Silva, Bertolino The major activities planned for the run were commissioning of the divertor cryopump (finish mp160), and impurity injection in the divertor to observe the effects of the new pump (mp177). The pump was cooled down to LHe temps between shots 11 and 12. However, blow-by through the LHe valve had already cooled the pump down to the 20 to 30K level during the early part of the run before we officially turned it on. However, from shot 11 on we were pretty much in control of the pump: 11-18 : pump on 19-20 : pump off (>100K) 21-31 : pump on 32-34 : pump partially off and dumping gas during/after shot Below I have listed some pumping speeds from various gauges measured well after the shot (7 to 12 seconds). These measurements should give a good indication when the pump was pumping D2, though what its pumping speed for other gases was is not clear for shots 1 to 10. Note that the pumping speed calculations assume there is no gas source, so on shots where we had just dumped the pump, or had disruptions that heated up the walls, the quoted speeds can be very low. Note also that f-side ratiomatic was not operating early (at least after the shot) early in the run. Jim Terry reported that the pump reduced nitrogen levels both in the core and in the divertor by a factor of two. This is pretty impressive for what is supposed to be about 10% of our eventual pumping speed. A first look at the late time behaviour of the plasma density also indicated that the density was being reduced even as the gas valve demand was going up when the pump was on. I consider MP160 complete. The only part not done involved looking at density rate of rise changes with and without the pump during H-mode. We will certainly gather this data during future runs without resorting to MP160. Several hardware fixes for the pump/diag are required to make it easier to use during the run: . need to fix the leaky LHe valve . need to be able to dump LHe cryostat pressure from the control room . reliability of the LHe valve control needs to be improved . Spencer is attempting to bring the divertor MKS gauge back to life. Having pressure data in the divertor would make understanding the pump operation much easier. . D2 puff rates need to be measured 970617001 B-bot MKS Pumping Speed: 195 l/s 970617001 B-bot Ratio Pumping Speed: 180 l/s 970617001 F-side Ratio Pumping Speed: 5 l/s 970617002 B-bot MKS Pumping Speed: 244 l/s 970617002 B-bot Ratio Pumping Speed: 210 l/s 970617002 F-side Ratio Pumping Speed: 7 l/s 970617003 B-bot MKS Pumping Speed: 153 l/s 970617003 B-bot Ratio Pumping Speed: 159 l/s 970617003 F-side Ratio Pumping Speed: 2 l/s 970617004 B-bot MKS Pumping Speed: 555 l/s 970617004 B-bot Ratio Pumping Speed: 449 l/s 970617004 F-side Ratio Pumping Speed: 484 l/s 970617005 B-bot MKS Pumping Speed: 206 l/s 970617005 B-bot Ratio Pumping Speed: 189 l/s 970617005 F-side Ratio Pumping Speed: 4 l/s 970617006 B-bot MKS Pumping Speed: 225 l/s 970617006 B-bot Ratio Pumping Speed: 198 l/s 970617006 F-side Ratio Pumping Speed: 0 l/s 970617007 B-bot MKS Pumping Speed: 197 l/s 970617007 B-bot Ratio Pumping Speed: 258 l/s 970617007 F-side Ratio Pumping Speed: 284 l/s 970617008 B-bot MKS Pumping Speed: 451 l/s 970617008 B-bot Ratio Pumping Speed: 488 l/s 970617008 F-side Ratio Pumping Speed: 535 l/s 970617009 B-bot MKS Pumping Speed: 504 l/s 970617009 B-bot Ratio Pumping Speed: 498 l/s 970617009 F-side Ratio Pumping Speed: 542 l/s 970617010 B-bot MKS Pumping Speed: 387 l/s 970617010 B-bot Ratio Pumping Speed: 485 l/s 970617010 F-side Ratio Pumping Speed: 528 l/s 970617011 B-bot MKS Pumping Speed: 269 l/s 970617011 B-bot Ratio Pumping Speed: 249 l/s 970617011 F-side Ratio Pumping Speed: 278 l/s Cryopump turned on 970617012 B-bot MKS Pumping Speed: 385 l/s 970617012 B-bot Ratio Pumping Speed: 813 l/s 970617012 F-side Ratio Pumping Speed: 834 l/s 970617013 B-bot MKS Pumping Speed: 556 l/s 970617013 B-bot Ratio Pumping Speed: 862 l/s 970617013 F-side Ratio Pumping Speed: 1408 l/s 970617014 B-bot MKS Pumping Speed: 724 l/s 970617014 B-bot Ratio Pumping Speed: 874 l/s 970617014 F-side Ratio Pumping Speed: 1416 l/s 970617015 B-bot MKS Pumping Speed: 1277 l/s 970617015 B-bot Ratio Pumping Speed: 930 l/s 970617015 F-side Ratio Pumping Speed: 1472 l/s 970617016 B-bot MKS Pumping Speed: **** l/s 970617016 B-bot Ratio Pumping Speed: 822 l/s 970617016 F-side Ratio Pumping Speed: 1377 l/s 970617017 B-bot MKS Pumping Speed: **** l/s 970617017 B-bot Ratio Pumping Speed: 841 l/s 970617017 F-side Ratio Pumping Speed: 1400 l/s 970617018 B-bot MKS Pumping Speed: 533 l/s 970617018 B-bot Ratio Pumping Speed: 948 l/s 970617018 F-side Ratio Pumping Speed: 1497 l/s Cryopump dumped, long cell access period 970617019 B-bot MKS Pumping Speed: 283 l/s 970617019 B-bot Ratio Pumping Speed: 256 l/s 970617019 F-side Ratio Pumping Speed: 271 l/s 970617020 B-bot MKS Pumping Speed: 189 l/s 970617020 B-bot Ratio Pumping Speed: 191 l/s 970617020 F-side Ratio Pumping Speed: 210 l/s Cryopump on again 970617021 B-bot MKS Pumping Speed: 239 l/s 970617021 B-bot Ratio Pumping Speed: 828 l/s 970617021 F-side Ratio Pumping Speed: 873 l/s 970617022 B-bot MKS Pumping Speed: 1325 l/s 970617022 B-bot Ratio Pumping Speed: 976 l/s 970617022 F-side Ratio Pumping Speed: 1033 l/s 970617023 B-bot MKS Pumping Speed: 722 l/s 970617023 B-bot Ratio Pumping Speed: 840 l/s 970617023 F-side Ratio Pumping Speed: 915 l/s 970617024 B-bot MKS Pumping Speed: 505 l/s 970617024 B-bot Ratio Pumping Speed: 896 l/s 970617024 F-side Ratio Pumping Speed: 1044 l/s 970617025 B-bot MKS Pumping Speed: 885 l/s 970617025 B-bot Ratio Pumping Speed: 1187 l/s 970617025 F-side Ratio Pumping Speed: 0 l/s 970617026 B-bot MKS Pumping Speed: 810 l/s 970617026 B-bot Ratio Pumping Speed: 762 l/s 970617026 F-side Ratio Pumping Speed: 899 l/s 970617027 B-bot MKS Pumping Speed: 674 l/s 970617027 B-bot Ratio Pumping Speed: 849 l/s 970617027 F-side Ratio Pumping Speed: 1001 l/s 970617028 B-bot MKS Pumping Speed: 865 l/s 970617028 B-bot Ratio Pumping Speed: 748 l/s 970617028 F-side Ratio Pumping Speed: 899 l/s 970617029 B-bot MKS Pumping Speed: 638 l/s 970617029 B-bot Ratio Pumping Speed: 1181 l/s 970617029 F-side Ratio Pumping Speed: 5 l/s 970617030 B-bot MKS Pumping Speed: 714 l/s 970617030 B-bot Ratio Pumping Speed: 733 l/s 970617030 F-side Ratio Pumping Speed: 991 l/s 970617031 B-bot MKS Pumping Speed: 1457 l/s 970617031 B-bot Ratio Pumping Speed: 1105 l/s 970617031 F-side Ratio Pumping Speed: 1278 l/s Cryopump warmup, pump dumps during/after next couple of shots 970617032 B-bot MKS Pumping Speed: 139 l/s 970617032 B-bot Ratio Pumping Speed: 134 l/s 970617032 F-side Ratio Pumping Speed: 0 l/s 970617033 B-bot MKS Pumping Speed: 80 l/s 970617033 B-bot Ratio Pumping Speed: 65 l/s 970617033 F-side Ratio Pumping Speed: 0 l/s 970617034 B-bot MKS Pumping Speed: 279 l/s 970617034 B-bot Ratio Pumping Speed: 438 l/s 970617034 F-side Ratio Pumping Speed: 488 l/s |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:57:740PM |
| Author: To Be Determined |
970617 HUTCH PHYSICS_OPERATOR 17-JUN-1997 07:39:01.91 . . . . . . . . . . . . . . . . . . . . Cryopump Conditioning, MP160, Cryopump and Impurities MP177 SL Irby/Blip PO Hutch/Granetz Plan: Get the sparker-assisted breakdown going reliably. Check out cryopump Look at impurity injection effects. Help complete RF conditioning process. Fix the ramp-down Chew gum All at the same time. Summary _______ Most of the plan was accomplished at some level, except the gum. Ninja puffs were observed with and without the cryopump. The cryopump showed some evidence of ability to decrease the density at the end of the shot. The longest ramp-down coincided with the best density decrease. The RF got to 1.5MW at 80 MHz. With a little H-mode seen. The sparker was used routinely but did not give good immunity to duds. Current about 150 uA. Breakdown and current rise was erratic (to say the least) however, the x-point laser demonstrated excellent correlation with non-duds. Thus showing its superiority to the sparker as a preionization assist. We have a breakdown problem even with the sparker. Hydrogen stayed at about 10% all day. Scorecard. _________ Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax 1 0.611 1.091 2 1.519 1.009 3 1.123 1.071 4 0.000 0.016 5 1.420 1.014 6 1.349 1.009 7 1.500 1.014 8 0.000 0.016 9 0.000 0.037 10 0.000 0.027 11 1.484 1.009 12 0.000 0.037 13 0.000 0.037 14 0.000 0.037 15 0.000 0.037 16 0.000 0.037 17 0.000 0.042 18 0.000 0.047 19 1.509 1.009 20 1.524 1.009 21 0.000 0.027 22 1.654 1.014 23 1.585 1.014 24 0.000 0.021 25 1.198 1.050 26 0.000 0.037 27 0.000 0.016 28 0.000 0.016 29 0.913 1.071 30 0.000 0.027 31 1.494 1.019 32 0.624 1.071 33 0.990 1.076 34 0.000 0.032 Finished summary for 970617 Total of 34 shots. 34 shots. 16 plasmas. 14 fizzles. 4 duds. Fizzle = gt 20 lt 50kA. [Actually there were a couple of duds > 20kA.] For details see the logbook. |
| Session Leader Comments |
| Physics Operator Comments | |||
| Jun 17 1997 07:39:01:910AM | Ian Hutchinson | Cryopump Conditioning, MP160, Cryopump and Impurities MP177 SL Irby/Blip PO Hutch/Granetz Start From last shot of yesterday as set-up. Plan: Get the sparker-assisted breakdown going reliably. Check out cryopump Look at impurity injection effects. Help RF conditioning process to be completed Fix the ramp-down Chew gum All at the same time. | |
| Jun 17 1997 08:38:32:170AM | Ian Hutchinson | Comments on the base shot. Things that might be fixed. Slight vertical instability at around .3s. Plasma is fairly far in while being diverted. Plasma touches the outboard limiter (mfil) at 760 ms. Ar pulse is at .300 to .318 s Fill pulse is 21 ms. OH2 startup voltages have been symmetrized. OH2 currents at t=0: -26090,-27579. EF1 currents: -6330, -6150. EF1U is not reaching current. Moved the penultimate EF1 points back to -.2s from -.1 s to make it top out earlier. | |
| Jun 17 1997 08:52:09:560AM | Ian Hutchinson | Problem with the interferometer to start with. Checked on the possibility of z-meter feedback. It is channel 83 on the hybrid but does not have any signal yesterday. Possibility of open loop operation: Looked at phys M out. Trial paste into pg3. That worked. Jim reports we may be ready so we remove that and try for feedback in standard mode. | |
| Jun 17 1997 09:59:50:310AM | Ian Hutchinson | Computers died and the whole cluster needed to be rebooted. Redid cold start. Reload the model. | |
| Jun 17 1997 10:25:12:080AM | 970617001 | Ian Hutchinson | Plasma disrupted at 0.59s. Halo warning. Breakdown at 6.7ms. Sparler on -20 to +20ms. EF1U reaches flat section but still is 150A low. Plasma still far out. Move rcur in by 2 mm to .669m. |
| Jun 17 1997 10:37:36:050AM | 970617002 | Ian Hutchinson | Plasma to 1.51s. Neon Ninja enabled |
| Jun 17 1997 11:00:00:590AM | 970617003 | Ian Hutchinson | Plasma disrupts at 1.1s. RF starts at 1.5kW at 0.9s. A big density rise and plasma cooling starts at 1s. This seems to be divertor detachment. Probably caused by the neon ninja puff being too much. Start TF down ramp at 1.2s for decompression termination. Lower ninja neon pressure to 2 psi from 4psi. Add 3ms to fill puff, to slow the current rise. |
| Jun 17 1997 11:09:31:970AM | 970617004 | Ian Hutchinson | Dud. No obvious field problems. Sparker was on. Repeat |
| Jun 17 1997 11:25:33:010AM | 970617005 | Ian Hutchinson | Plasma till 1.42s. Breakdown at 4.5ms. Divertor detaches in ramp down. Neon pressure to 3psi. |
| Jun 17 1997 11:39:07:940AM | 970617006 | Ian Hutchinson | Plasma till 1.347s. Divertor Detachment at 1.2s. Seems to be an interaction with the outboard limiter at .43 seconds caused by lurch at OH1 cross-over. Switch ninja to 4psi of Nitrogen. |
| Jun 17 1997 11:46:52:880AM | 970617007 | Ian Hutchinson | Plasma till 1.5s. Tweaked the position at .4s. Increase of nitrogen by using a second capillary. |
| Jun 17 1997 11:55:11:950AM | 970617008 | Ian Hutchinson | Dud. Sparker was on. Fields look fine. Repeat. |
| Jun 17 1997 11:58:54:820AM | 970617009 | Ian Hutchinson | Fizzle. Late breakdown at 10ms. EF4 to -1295 from -1305. |
| Jun 17 1997 12:07:50:280PM | 970617010 | Ian Hutchinson | Fizzle. Breakdown even later. EF4 to -1315. |
| Jun 17 1997 12:19:12:240PM | 970617011 | Ian Hutchinson | Plasma till 1.5s. Breakdown at 7ms. 20 kW. EF4 to -1320. Cryopump on. It may have been somewhat cold before because of He valve leak. TF rampdown end to 2s. |
| Jun 17 1997 12:29:15:730PM | 970617012 | Ian Hutchinson | Fizzle. Breakdown at 5ms. Bounces at 44kA. Fill pulse to 28ms. (was 24). |
| Jun 17 1997 12:35:53:660PM | 970617013 | Ian Hutchinson | Fizzle. Breakdown at 4ms. Bounce at 44kA. Rcur offset to 6800 from 6600. (Segment 1). |
| Jun 17 1997 12:45:25:550PM | 970617014 | Ian Hutchinson | Fizzle. Breakdown at 6ms. Rcur offset to 6400. |
| Jun 17 1997 12:52:45:810PM | 970617015 | Ian Hutchinson | Fizzle. Bdwn at 6ms. 44kA. Plasma looks too far out, but it like this better than the higher rcur offset, it seems. Ef4 to -1330. |
| Jun 17 1997 02:39:30:970PM | 970617016 | Ian Hutchinson | Fizzle. Bounces slightly earier. Fill puff to 20ms. |
| Jun 17 1997 01:07:17:830PM | 970617017 | Robert Granetz | Shot 17 -- Fizzle. Granetz substitutes temporarily as physop for Ian. Next shot: reload segment 1 from shot 007 earlier today. |
| Jun 17 1997 01:12:47:790PM | 970617018 | Robert Granetz | Shot 18 -- Fizzle. 55 kA. Next shot: turn off the cryopump. No other changes. |
| Jun 17 1997 02:04:50:730PM | 970617019 | Robert Granetz | Cell access required a very long delay (45 minutes) due to low oxygen levels in the cell. |
| Jun 17 1997 02:07:59:960PM | 970617019 | Robert Granetz | Shot 19 -- Plasma. Good shot. Terminates at1.51 s. The cryopump was turned off prior to this shot. No NINJA puffing. Next shot: Enable NINJA puffing of nitrogen. |
| Jun 17 1997 02:23:34:630PM | 970617020 | Robert Granetz | Shot 20 -- Plasma. Good shot. Terminates at 1.52 s. Nitrogen was puffed from the NINJA. There was also 0.3 MW of 80 MHz ICRF. Next shot: another nitrogen puff (identical to last shot), and enable nitrogen puff from burbing FSP, and start re-cooling the cryopump again (it will take a shot to get down to operating temperature) |
| Jun 17 1997 02:26:30:180PM | 970617021 | Robert Granetz | The cryopump made it down to operating temperature before we took this shot. |
| Jun 17 1997 02:33:48:040PM | 970617021 | Robert Granetz | Shot 21 -- Fizzle. Cryopump was at operating temperature. Is there a correlation here? As it turns out, the edge Thomson scattering laser was not firing on this shot, or on shot 18, but was on for 19 and 20. Next shot: repeat with no changes, except fire the edge TS laser. (NINJA nitrogen puffing and B-FSP nitrogen puffing is enabled.) |
| Jun 17 1997 02:43:09:830PM | 970617022 | Robert Granetz | Shot 22-- Plasma. Good shot. Terminates at 1.65 s. Good rampdown. This is the first shot which had the cryopump on. It may be pumping out the density during the rampdown, resulting in a longer rampdown. The current rise of the last several plasmas was also very good. This shot had nitrogen puffing from the NINJA and the B-FSP. Ian has now returned and will take over as physop again. |
| Jun 17 1997 03:04:44:040PM | 970617023 | Ian Hutchinson | Plasma. Ramp down to 1.58s. Got 0.9 MW and some heating. Still signs of possible pump-out. Switch to 3psi Nitrogen. Tweak the ramp down to stay at R=.65. (But with Neon, there probably is not much hope). |
| Jun 17 1997 03:11:44:590PM | 970617024 | Ian Hutchinson | Many camac errors. No plasma. Dud. Ack fails on entering pulse. Recovered magnetics look ok. Repeat. |
| Jun 17 1997 03:23:41:160PM | 970617025 | Ian Hutchinson | Plasma. till 1.19s. Neon causes divertor detachment. Big puff. RF gets 1.2MW brief burst. Reduce neon puff duration by 2. Increase nl04 to 1.5. |
| Jun 17 1997 03:34:30:920PM | 970617026 | Ian Hutchinson | Fizzle, Latish breakdown, CII up by a factor of 2. (.006). Repeat. |
| Jun 17 1997 03:43:19:450PM | 970617027 | Ian Hutchinson | Dud. Laser was off. Sparker fails us! Bz looks rather high. EF4 to -1315, from 1305. Br offset to .007 from .008. |
| Jun 17 1997 03:51:28:030PM | 970617028 | Ian Hutchinson | Dud. No Laser. Fill to 30ms. Br offset to 7.5mT. |
| Jun 17 1997 04:03:04:020PM | 970617029 | Ian Hutchinson | Plasma till 0.91s. Bdwn at 5ms. Hesitation. Divertor detachment leads to cooling. Halo warning. Gas puff is flat out. Repeat without neon. |
| Jun 17 1997 04:10:34:380PM | 970617030 | Ian Hutchinson | Dud. No laser. Bz looks too positive. ef4 to -1325. |
| Jun 17 1997 04:43:57:060PM | 970617031 | Ian Hutchinson | Plasma till 1.5s. Laser fired briefly. Breakdown at 6ms. Tiny H-mode at 0.6s. 1.2MW RF. Up to 1.5MW Prad. Now to warm up the cryopump! A big dump up to 10 mtorr is seen but not all the pots are getting warm. Jim pronounces that he thinks we are not pumping hydrogen. Pot temperatures in the region of 10-15. |
| Jun 17 1997 04:56:02:000PM | 970617032 | Ian Hutchinson | Plasma. Disrupts at 0.61s. Big injection. CII is .008, slower current rise. Breakdown at 5.7ms. Got higher fill, .08mtorr. Hydrocarbons stay very high on the RGA. ef4 to -1330. |
| Jun 17 1997 05:06:45:840PM | 970617033 | Ian Hutchinson | Plasma till 1s. No laser! Breakdown at 8ms. No hesitation. CII=.008. 1.5 MW. Another big gas dump after this shot. Density demand to nl04=1. |
| Jun 17 1997 05:08:51:640PM | 970617034 | Ian Hutchinson | Fizzle. late breakdown at 10ms. CII over .01. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 10:11:12:310AM | Plasma | Ok | |
| 2 | 10:26:24:740AM | Plasma | Ok | |
| 3 | 10:46:00:000AM | Plasma | Ok | |
| 4 | 11:01:07:390AM | Plasma | Ok | |
| 5 | 11:08:58:710AM | Plasma | Ok | |
| 6 | 11:22:37:330AM | Plasma | Ok | |
| 7 | 11:37:22:840AM | Plasma | Ok | |
| 8 | 11:46:24:410AM | Plasma | Ok | |
| 9 | 11:53:22:780AM | Plasma | Ok | |
| 10 | 12:00:57:580PM | Plasma | Ok | |
| 11 | 12:07:48:090PM | Plasma | Ok | |
| 12 | 12:19:18:520PM | Plasma | Ok | |
| 13 | 12:28:08:630PM | Plasma | Ok | |
| 14 | 12:36:04:200PM | Plasma | Ok | |
| 15 | 12:43:58:520PM | Plasma | Ok | |
| 16 | 12:51:23:880PM | Plasma | Ok | |
| 17 | 01:00:00:350PM | Plasma | Ok | |
| 18 | 01:09:15:060PM | Test | Ok | |
| 19 | 02:02:01:300PM | Plasma | Ok | plasma ok |
| 20 | 02:14:01:150PM | Plasma | Ok | plasma shot |
| 21 | 02:26:37:950PM | Plasma | Ok | |
| 22 | 02:35:07:420PM | Plasma | Ok | |
| 23 | 02:48:09:240PM | Plasma | Ok | |
| 24 | 03:04:07:030PM | Plasma | Ok | |
| 25 | 03:12:49:200PM | Plasma | Ok | |
| 26 | 03:24:33:450PM | Plasma | Ok | |
| 27 | 03:32:59:280PM | Plasma | Ok | |
| 28 | 03:41:34:560PM | Plasma | Ok | |
| 29 | 03:49:49:790PM | Plasma | Ok | |
| 30 | 04:01:07:880PM | Plasma | Ok | |
| 31 | 04:10:47:180PM | Plasma | Ok | |
| 32 | 04:42:09:080PM | Plasma | Ok | |
| 33 | 04:54:36:540PM | Plasma | Ok | |
| 34 | 05:04:42:530PM | Plasma | Ok | |