| Miniproposals | ||||||||||
| ||||||||||
|
| Operators | |
| Session leader(s): | Ian Hutchinson,John Goetz |
| Physics operator(s): | Bill Rowan |
| Engineering operator(s): | Frank Silva |
| Engineering Operator Run Comment |
| MP217A,MP222/Rowan/Silva |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:20:150PM |
| Author: To Be Determined |
| Summary of First Half of Run. Nice rotation data was obtained at 1.1, 1.0MA, bricks killed us at 1.2MA. Magnetics rotation was obtained at 0.8MA but the Argon line intensity was very low. A He-like line may be needed for the low current data. Disruption was avoided in ramp-down by a reramp up of B_t 12 Plasmas were obtained, 7 with Ohmic H-modes. Very useful. |
| Entered: Jul 7 2004 03:49:20:163PM |
| Author: To Be Determined |
| Run 990305B -- MP #222 Impurity Compression and Enrichment This proposal is an attempt to extend the compression and enrichment database to gases other than argon and investigate the effect of the divertor bypass on impurity behavior. It was also hoped that that argon compression scaling with density in Ohmic plasmas from the 1997-98 run campaign could be reproduced. The physics plan is to: 1. Perform a density scan with puffed argon and krypton in Ohmic plasmas. Start with low density and increase until the detachment threshold is passed. 2. Pick an intermediate density and do a divertor bypass scan, i.e., bypass closed, open, closed->open, and open->closed. Physics Summary: The run was successful in covering the above points. Argon and krypton were puffed into Ohmic plasmas with nl04 ranging from 0.65 x 10^20 to 1.4 x 10^20 with Ip=0.8MA. The detachment threshold for these plasmas is ~1.36 x 10^20. The scaling of argon compression with density is similar to that obtained in the previous run campaign. However, the compression values are reduced by a factor of ~2. The krypton data is yet to be analyzed. The core krypton levels are awaiting some modelling. The divertor bypass does indeed have an effect on the impurity behavior. The difference on the argon compression with the bypass open and bypass closed is a factor of about two. The compression is higher with the bypass closed. This is due to less argon in the core and more argon in the divertor. Opening and closing the bypass during a discharge reproduces these results dynamically (see shot 024 and 025). This was a good beginning on MP222. The detailed shot log follows: Shot Result ---- ------ 016 plasma - Ar puff; no Kr puff; flappers closed; strike points @ pr. 6 017 plasma - Ar and Kr puff; flappers closed; strike points betw. pr 5 & 6. nl04=0.66e20 but drooping after 1.0s 018 plasma - 40ms Kr, 30ms Ar, nl04=0.67e20; strike points betw. 4 & 5 moving to 6; flappers closed 019 plasma - 50ms Kr, 30ms Ar, nl04=0.7e20; flappers closed; strike point between 4 & 5; nl04=0.7e20 020 plasma - 50ms Kr, 30ms Ar, nl04=0.8->1e20; flappers closed; strike point between 3 &4; 2.5x Kr in divertor 021 plasma - 50ms Kr, 30 ms Ar; nl04=1.0->1.1e20; flappers closed; strike point between 4 & 6; inner divertor beginning to detach; outer divertor down to 10eV 022 plasma - 50ms Kr, 30ms Ar, flappers closed;both divertors detach @ 1.0s nl04=1.36e20 -> 1.45e20 after detachment; divertor Kr down 023 plasma - 50ms Kr; 30ms Ar; flappers open; nl04=1.1e20; more core Kr, less core Kr, and reduced divertor argon compression compared to the flappers closed 024 plasma - 50ms Kr, 30ms Ar, flappers open then closed @ 0.9s; core Kr and Ar drop, divertor Ar up 025 plasma - 50ms Kr, 30ms Ar, flappers closed then open @ 0.9s; core Kr and Ar rise, divertor Ar down |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:00:753PM |
| Author: To Be Determined |
| Physop Report for Friday, March 5, 1999 SL: J. Rice/J. Goetz PO: W. Rowan EO: F. Silva This purpose of this run was to study Toroidal Rotation during Ohmic H-Modes (MP 217A) and Impurity Compression and Enrichment Studies (MP 222). Results will be contained in the Session Leader Summaries. Shot 990223021 was loaded to begin the Ohmic H-Mode work. Ohmic H-modes were obtained. The toroidal field was ramped from 5.4 T to 3.5 T and then held constant until the end of the shot. With the initial setup, the plasma disrupted after the H-Mode, during the plateau in BT, and near 1 s. See shot 990305009, for example. The disruption was avoided by ramping the field back up and increasing q. See shot 990305012, for example. The H-Mode still appeared. In fact, there was an H-mode during the ramp up on shot 990305013. Shot 990204018 was loaded for MP 217A. During this run, the various gaspuff times were varied and density was varied. Straightforward operation. Engineering setup 2 hours ECDC in deuterium on Friday morning before the run Load from 990223021 TF under hybrid control Gas setup - fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid ENABLED fill B-side upper with 2 psi of Ne Hybrid DISABLED(yes, neon) fill C-side with 30 psi of D2 Hybrid enabled fill J-bottom with 2 psi of Kr Hybrid DISABLED Shot 001. fizzle Shot 002. plasma Shot 003. Plasma. No H-mode. Shot 004. Plasma. H-mode at 1.1s. Disrupted at 1.2s Shot 005. Plasma. H-Mode as on previous shot. Shot 006. Plasma. H-mode Shot 007. Plasma. Disrupted at 0.35s. Shot 008. Fizzle. Shot 009. Plasma H-mode. Disruption at 0.884s. Shot 010. Plasma. H-mode. Disruption at 0.9s. Shot 11. Null shot. Shot 12. Plasma. H-Mode. Shot 13. Plasma. H-mode. Shot 14. Disruption at 0.565s Shot 15. Plasma. Disrupted at 0.66s Shot 16. Plasma Shot 17. Plasma. Shot 18. Plasma. Shot 19. Plasma Shot 20. Plasma Shot 21. Plasma Shot 22. Plasma. Shot 23. Plasma Shot 24. Plasma Shot 25. Plasma . Last shot. Score Card Plasmas 22 Fizzles 2 Dud 0 Total 24 (Note that there was null shot) |
| Session Leader Comments | |||
| Mar 5 1999 08:52:06:280AM | Ian Hutchinson | MP 217A Toroidal Rotation in Ohmic H-modes Completing the abbreviated run from 990223. Plan to get some different currents. | |
| Mar 5 1999 01:30:51:780PM | Ian Hutchinson | Summary of First Half of Run. Nice rotation data was obtained at 1.1, 1.0MA, bricks killed us at 1.2MA. Magnetics rotation was obtained at 0.8MA but the Argon line intensity was very low. A He-like line may be needed for the low current data. Disruption was avoided in ramp-down by a reramp up of B_t 12 Plasmas were obtained, 7 with Ohmic H-modes. Very useful. | |
| Mar 5 1999 09:01:47:170AM | 990305001 | Ian Hutchinson | Fizzle. |
| Mar 5 1999 09:25:20:483AM | 990305002 | Ian Hutchinson | Plasma. Sawtooth rotation is clear in H-mode seems to reach 9kHz. Not so clear in L-phase. |
| Mar 5 1999 09:33:08:500AM | 990305003 | Ian Hutchinson | Plasma. No H-mode with this higher level of Argon. Some isolated "dithers". During this time when it is trying to go into H-mode it looks as if the sawtooth frequency is positive by maybe a couple of kHz. |
| Mar 5 1999 10:09:01:077AM | 990305004 | Ian Hutchinson | Plasma. H-mode just before the disruption, 1.1 to 1.2s. Sawtooth rotation about 5kHz co in H-mode. q-value is becoming low only by about 0.9s. We prefer earlier, so ask for the TF ramp to start at 10ms instead of 100ms. Density might be a little low for optimal H-mode entry. |
| Mar 5 1999 10:33:20:640AM | 990305005 | Ian Hutchinson | Plasma. Very similar. Ask for 1e20 density next shot. Was set to 0.8e20. |
| Mar 5 1999 10:53:05:250AM | 990305006 | Ian Hutchinson | Plasma. H-mode from 1.07 to 1.23s, makes it into ramp-down. Co about 7.5kHz during H-mode. Reload shot 990223012 and tweak Bt ramp raise nl04 to 1. |
| Mar 5 1999 11:07:02:530AM | 990305007 | Ian Hutchinson | Plasma. Disrupts at 0.35s. A brick. |
| Mar 5 1999 11:13:44:340AM | 990305008 | Ian Hutchinson | Fizzle. |
| Mar 5 1999 12:03:23:327PM | 990305009 | Ian Hutchinson | Plasma. Disrupts at .88s. 2 elm-free H-modes starting at 0.62 and 0.75s. Digitization of the magnetics starts too late, 0.8s. |
| Mar 5 1999 12:13:27:153PM | 990305010 | Ian Hutchinson | Plasma. Disrupts at .91s. Very similar to previous shot. But fast signals set earlier so we have good data. |
| Mar 5 1999 12:23:38:060PM | 990305011 | Ian Hutchinson | Null shot. We weren't ready. |
| Mar 5 1999 12:33:43:293PM | 990305012 | Ian Hutchinson | Plasma. No disruption. On this shot we had nl04 at 0.9 but mainly we installed a field ramp back up starting about 0.75s. The second H-mode is slightly shorter. It seems to know that the field is ramping back up. |
| Mar 5 1999 12:55:05:983PM | 990305013 | Ian Hutchinson | Plasma. No disruption. 3 H-modes in flat top. Plus one in ramp-down. Raised Ip to 1.1MA and scale the flat low Bt level also by 10%. Sawtooth frequencies about 8kHz on first two H-modes. Much less on the third. Is confirmed by the Argon data. The field was going back up there so q was nearly up to 3. |
| Mar 5 1999 01:13:27:937PM | 990305014 | Ian Hutchinson | Plasma. Disrupts at 0.55s. Caused by OH1 coming out of cross-over and we touch the inner limiter. Try to fix by delaying the final Ip point and increasing clearin by 5mm during the .4s time phase. |
| Mar 5 1999 01:18:59:653PM | 990305015 | Ian Hutchinson | Plasma. Disrupts again at .66s. No H-mode. An brick even though we avoided limiter contact. |
| Mar 5 1999 01:51:56:217PM | 990305016 | John Goetz | Shot 990305016 Ar puff and Kr puff attempted into a "long" plasma Plasma no Kr puff - J_Bottom valve waveform only 15V strike points at probe 6; moving up late nl04 = 0.66e20 |
| Mar 5 1999 02:20:49:763PM | 990305017 | John Goetz | Shot 990305017 Ar puff and Kr puff attempted into a "long" plasma Plasma Kr puff thru B_side_upper; not enough for divertor RGA or spectroscopy measurements strike points between probe5 and probe 6 nl04 = 0.66e20 but drooping after 1.0s (ancient programming) |
| Mar 5 1999 02:41:45:123PM | 990305018 | John Goetz | Shot 990305018 30ms Ar puff and 40ms Kr puff attempted into a "long" plasma Plasma krypton seen on RGA, McPherson, and HIREX; but not quite enough strike points between probe 4 and 5 but drifting up to probe 6 nl04 = 0.67e20 but drooping after 1.1s |
| Mar 5 1999 03:01:12:077PM | 990305019 | John Goetz | Shot 990305019 30ms Ar puff and 50ms Kr puff attempted into a "long" plasma Plasma krypton seen on RGA, McPherson, and HIREX; better strike points between probe 4 and 5 nl04 = 0.7e20; no drooping |
| Mar 5 1999 03:28:22:013PM | 990305020 | John Goetz | Shot 990305020 30ms Ar puff and 50ms Kr puff attempted into a "long" plasma Plasma krypton seen on RGA, McPherson, and HIREX; slight "pump-out" on the Ar and Kr core densities strike points between probes 3 and 4 and moving to 6 late nl04 = 0.8->1.0e20 |
| Mar 5 1999 03:45:21:810PM | 990305021 | John Goetz | Shot 990305021 30ms Ar puff and 50ms Kr puff attempted into a "long" plasma Plasma krypton seen on RGA, McPherson, and HIREX; slight "pump-out" on the Ar and Kr core densities strike points moves between probes 4 and 6 nl04 = 1.0->1.1e20 divertor cooling off; inner divertor nearing detachment |
| Mar 5 1999 04:08:55:263PM | 990305022 | John Goetz | Shot 990305022 30ms Ar puff and 50ms Kr puff attempted into a "long" plasma Plasma krypton seen on RGA, McPherson, and HIREX; no "pump-out" on the Ar and Kr core densities detachment on both divertors to the "noses" a lot of strike point movement nl04 = 1.36 before detachment to 1.45 after detachment much less Kr in the divertor Kr core density up after detachment, Ar core density constant |
| Mar 5 1999 04:32:18:793PM | 990305023 | John Goetz | Shot 990305023 30ms Ar puff and 50ms Kr puff attempted into a "long" plasma Plasma flappers open for the whole shot krypton seen on RGA, McPherson, and HIREX; "pump-out" on the Ar and Kr core densities a lot of strike point movement nl04 = 1.1 more Kr seen by HIREX and McP when compared to the flappers closed shot divertor argon compression is reduced compared to the flappers closed shot |
| Mar 5 1999 04:52:42:013PM | 990305024 | John Goetz | Shot 990305024 30ms Ar puff and 50ms Kr puff attempted into a "long" plasma Plasma flappers open and then close @ 0.9s krypton seen on RGA, McPherson, and HIREX krypton and argon signals are halved when the flappers close a lot of strike point movement nl04 = 1.1 - feedback keeps it stable through the flapper movement radiated power drops, Dalpha rises after closure |
| Mar 5 1999 05:18:21:717PM | 990305025 | John Goetz | Shot 990305025 30ms Ar puff and 50ms Kr puff attempted into a "long" plasma Plasma flappers closed and then open @ 0.9s krypton seen on RGA, McPherson, and HIREX krypton and argon signals are doubled when the flappers open a lot of strike point movement nl04 = 1.1 - feedback keeps it stable through the flapper movement radiated power rises, Dalpha drops, divertor pressure drops after closure |
| Physics Operator Comments | |||
| Mar 5 1999 07:47:25:060AM | Bill Rowan | Subj: Engineering setup and run plan for Friday, 990305 Engineering Setup for Friday, 990305 2 hours ECDC in deuterium on Friday morning before the run Load from 990223021 TF under hybrid control 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 2 psi of Ne Hybrid DISABLED(yes, neon) fill C-side with 30 psi of D2 Hybrid enabled fill J-bottom with 2 psi of Kr Hybrid DISABLED The following gate valves should be enabled, assuming no vacuum problems: ECE, VUV ------------------------------------------------------------------------------- Run Plan for 990305: MP 217A -- Toroidal Rotation during Ohmic H-Modes MP 222 -- Impurity Compression and Enrichment Studies SL: J. Rice/J. Goetz PO: W. Rowan MP 217A Start by reloading 990223021, .8 MA Ohmic H-mode. If successful run a few shots, then attempt to obtain Ohmic H-modes at .6 MA. If .6 MA operation doesn't work, reload 990223014 at 1.0 MA, and try to ramp Bt up while maintaining the H-mode, hopefully avoiding disruptions. If this procedure is successful, perhaps attempt 1.2 MA. Miniproposal 222 Goals: extend compression and enrichment measurements to gases other than argon determine what effect the divertor bypass has on impurity compression and enrichment Plan: puff argon and krypton into Ohmic plasmas density scan divertor bypass open, closed, and dynami Modification to run plan. B-side lower Ar hybrid enabled | |
| Mar 5 1999 08:32:36:840AM | Bill Rowan | Started pcs and loaded from shot 9902230 Successful coldstart at 8. | |
| Mar 5 1999 09:00:55:357AM | 990305001 | Bill Rowan | Shot 001. fizzle Next shot: Lowered BR from 0.002 to 0.001 |
| Mar 5 1999 09:19:16:310AM | 990305002 | Bill Rowan | Shot 002. plasma Next shot: added an Ar puff at 0.8s. 30 ms. |
| Mar 5 1999 09:36:57:140AM | 990305003 | Bill Rowan | Shot 003. Plasma. No H-mode. Attributed to additional Ar puff Next shot: Moved Ar puff to 0.7s and reduced to 15 ms |
| Mar 5 1999 10:08:32:403AM | 990305004 | Bill Rowan | Shot 004. Plasma. H-mode at 1.1s. Disrupted at 1.2s Next shot: Moved the BT ramp down earlier |
| Mar 5 1999 10:32:05:560AM | 990305005 | Bill Rowan | Shot 005. Plasma. H-Mode as on previous shot. Next shot: Increase ne |
| Mar 5 1999 10:50:58:513AM | 990305006 | Bill Rowan | Shot 006. Plasma. H-mode Next shot:: Reloaded shot 990223012. This will increase the current to 1 MA. Increased ne. Reduced BR from 1.5 mT to 1 mT. BT ramp down moved about 100 ms earlier. |
| Mar 5 1999 11:05:17:840AM | 990305007 | Bill Rowan | Shot 007. Plasma. Disrupted at 0.35s. Next shot: no changes |
| Mar 5 1999 11:19:33:903AM | 990305008 | Bill Rowan | Shot 008. Fizzle. Next shot: Reduced prefill by 2 ms. Reduced BZ. |
| Mar 5 1999 11:34:27:357AM | 990305009 | Bill Rowan | Shot 009. Plasma H-mode. Disruption at 0.884s. Next shot: Reduced BZ in an attempt to avoid a fizzle -- Granetz gambit |
| Mar 5 1999 12:18:48:983PM | 990305010 | Bill Rowan | Shot 10. Shot 010. Plasma. H-mode. Disruption at 0.9s. |
| Mar 5 1999 12:17:30:700PM | 990305011 | Bill Rowan | Shot 11. Null shot. Next shot: Reduced density. Added a ramp up in BT at 0.75s. Increased outer gap |
| Mar 5 1999 12:34:00:937PM | 990305012 | Bill Rowan | Shot 12. Plasma. H-Mode. Next shot. Increase current to 1.1MA. Increase BT to maintain constant q |
| Mar 5 1999 12:52:48:187PM | 990305013 | Bill Rowan | Shot 13. Plasma. H-mode. Next shot: Increase current to 1.2MA. Increase BT to maintain constant q |
| Mar 5 1999 01:11:15:687PM | 990305014 | Bill Rowan | Shot 14. Disruption at 0.565s Next shot. Slowed IP and modified clearin |
| Mar 5 1999 01:31:56:483PM | 990305015 | Bill Rowan | Shot 15. Plasma. Disrupted at 0.66s Next shot. Start of MP 222. Reload segment 2 from 990204018 Kr puff at 0.375s |
| Mar 5 1999 01:52:45:937PM | 990305015 | Bill Rowan | Shot 16. Plasma Next shot: Pump neon out of B-side-upper and replace with 2 psi Kr |
| Mar 5 1999 02:19:38:920PM | 990305017 | Bill Rowan | Shot 17. Plasma. Gas turned off hard at 1 s Next shot. Gas turned off at the beginning of ramp down. That is, 1.4s. Increased Kr puff from 25 ms to 40 ms by changing turn off time. Pulse still starts at 0.375s |
| Mar 5 1999 02:42:57:500PM | 990305018 | Bill Rowan | Shot 18. Plasma. Next shot: Increased Kr pulse from 40 ms to 50 ms |
| Mar 5 1999 03:02:17:607PM | 990305019 | Bill Rowan | Shot 19. Plasma Next shot: Increased NL_04 to 1e20. Increased outer gap. |
| Mar 5 1999 03:23:34:543PM | 990305020 | Bill Rowan | Shot 20. Plasma Next shot: Increased NL_04 ro 1.1e20. Increased gain from 4 to 9. |
| Mar 5 1999 03:50:56:483PM | 990305021 | Bill Rowan | Shot 21. Plasma Next shot: Increased NL_04 to 1.3e20. Increased maintenance gas. |
| Mar 5 1999 04:12:02:200PM | 990305022 | Bill Rowan | Shot 22. Plasma. Next shot: NL_04 changed to 1.0e+20 |
| Mar 5 1999 04:28:43:170PM | 990305023 | Bill Rowan | Shot 23. Plasma Next shot: no changes |
| Mar 5 1999 04:48:40:873PM | 990305024 | Bill Rowan | Shot 24. Plasma Next shot: No changes |
| Mar 5 1999 05:03:12:590PM | 990305025 | Bill Rowan | Shot 25. Plasma. Last shot |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:49:22:000AM | Plasma | Ok | no faults/fizzel |
| 2 | 09:03:34:543AM | Plasma | Ok | no faults/1.16sec disruption |
| 3 | 09:20:18:967AM | Plasma | Ok | no faults/plasma |
| 4 | 09:51:50:140AM | Plasma | Ok | no faults/disruption |
| 5 | 10:08:45:670AM | Plasma | Ok | no faults/Disruption |
| 6 | 10:29:36:170AM | Plasma | Ok | no faults |
| 7 | 10:52:35:590AM | Plasma | Ok | no faults |
| 8 | 11:05:22:280AM | Plasma | Ok | no faults/fizzel |
| 9 | 11:20:35:717AM | Plasma | Ok | no faults/plasma |
| 10 | 11:40:45:717AM | Plasma | Ok | no faults |
| 11 | 12:11:07:030PM | Plasma | Ok | No Power due to not physop not ready |
| 12 | 12:19:07:920PM | Plasma | Ok | No Faults / Plasma |
| 13 | 12:34:39:200PM | Plasma | Ok | No Faults / Plasma |
| 14 | 12:53:31:310PM | Plasma | Ok | No Faults / Plasma |
| 15 | 01:11:26:043PM | Plasma | Ok | No Faults / Plasma |
| 16 | 01:36:13:437PM | Plasma | Ok | No Faults / Plasma |
| 17 | 02:06:21:670PM | Plasma | Ok | No Faults / Plasma |
| 18 | 02:25:50:310PM | Plasma | Ok | No Faults / Plasma |
| 19 | 02:48:29:233PM | Plasma | Ok | NO Faults / Plasma |
| 20 | 03:11:02:607PM | Plasma | Ok | No Faults / Plasma |
| 21 | 03:32:24:763PM | Plasma | Ok | No Faults / Plasma |
| 22 | 03:54:18:390PM | Plasma | Ok | No Faults / Plasma |
| 23 | 04:15:02:437PM | Plasma | Ok | No Faults / Plasma |
| 24 | 04:36:20:500PM | Plasma | Ok | No Faults / Plasma |
| 25 | 04:58:48:390PM | Plasma | Ok | No Faults / Plasma |