| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Robert Granetz,Spencer Pitcher |
| Physics operator(s): | Ron Parker |
| Engineering operator(s): | Unknown |
| Engineering Operator Run Comment |
| MP216,MP226 |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:19:947PM |
| Author: To Be Determined |
| Run summary for run 990304A MP 216 -- Edge pedestal scaling with dIp/dt SL: R. Granetz PO: R. Parker The primary goal for this half-day run is to determine the dependence of pedestal width on dIp/dt. A secondary goal is to measure the Te pedestal width at two different currents on the same shot. Summary: The secondary goal was accomplished on shot 13, with the expected result that the Te H-mode pedestal width is indeed independent of plasma current. The primary goal was only partially accomplished, with some observations of a dIp/dt dependence of the xray width at 0.8 and 1.0 MA (990304003, 990304007). The measurements are not as clear as hoped, primarily because the maximum available RF power (1.0 MW) was not enough to give long-duration H-modes. ------------------------------------------------------------------------------ Shot 01 -- Fizzle. Shot 02 -- Plasma. 0.8 MA steady-state. Long EDA H-mode. Good xray pedestal data. Top width is 2.2-2.6 mm, outboard width is 3.0-3.5 mm. Next shot: load the up/down 0.8 MA ramping shot. Shot 03 -- Plasma. Good 0.8 MA up/down ramping shot. Peak-to-peak variation of Ip is about 70 kA, which is somewhat less than the 100 kA variation that we asked for. Xray pedestal widths definitely show a difference between + and - dIp/dt. Difference is consistent with dependence seen a year ago. Next shot: load the 1.0 MA steady-state shot. Shot 04 -- Plasma. Good 1.0 MA steady-state shot. EDA H-mode from t=0.75 to 1.1 s. Widths were reasonably constant, but not as steady as at 0.8 MA. Next shot: load the 1.0 MA oscillating shot. Shot 05 -- Fizzle. Shot 06 -- Fizzle. Shot 07 -- Plasma. Good 1.0 MA oscillating shot. EDA H-mode from t=0.62 to 1.2, with a short L-mode at 1.02 s. Outboard pedestal width varies with dIp/dt as expected. Top width is not as clear. Next shot: try 1.2 MA steady-state Shot 08 -- Plasma. Good 1.2 MA steady-state shot. Prf=1.0 MW. Two long EDA H-modes (close to being ELMfree). Edge xray emissivity amplitude increases with plasma current. The outboard width is noticeably narrower (1.6 mm) than at lower currents, as expected. Next shot: try 1.2 MA oscillating shot. Shot 09 -- Plasma. Good 1.2 MA oscillating shot. Prf=1.0 MW. Two long EDA H-modes. The xray pedestal widths didn't show much dependence on dIp/dt at this current. Next shot: retry the 0.8 MA oscillating shot, except put in some neon to enhance the edge xray signals. Shot 10 -- Plasma. Good 0.8 MA oscillating shot, but some of the magnetics data acquisition was corrupted, resulting in problems for EFIT. Also, there was only one short H-mode (1.0-1.2 s). Next shot: repeat with no changes. Shot 11 -- Plasma. Good 0.8 MA oscillating shot, but again there was only one short H-mode. Next shot: do a dynamic Ip ramp from 0.8 to 1.1 MA, with a B-field bump at the 0.8 MA level and another B-field bump at the 1.1 MA level. Also: no neon puff. Shot 12 -- Plasma. Good dynamic Ip ramp, but there were no H-modes. RF turned off at 0.9 s, and Prf=0.9-1.0 MW. Next shot: repeat, with 10% more RF power. Shot 13 -- Plasma. Good dynamic Ip ramp, with two H-modes which are at the times of the Bp bumps. The outboard pedestal width at the higher current is nearly a factor of 2 less than at the lower current. HOWEVER, the GPC and TS temperature pedestals show NO difference at the two currents (0.8 and 1.1 MA) !!! This confirms last year's findings, but on a single shot. End of my half of the run day. |
| Entered: Jul 7 2004 03:49:20:133PM |
| Author: To Be Determined |
| Run Summary for 990304b MP 226 Multi-Diagnostic characterization of the edge Half-Day Run Session Leader: S Pitcher Phys Op : R Parker Purpose: Obtain a complete set of edge profiles with all available edge diagnostics....primary ones being, asp, fsp, ECE, Thomson and Kaiser. Operation: We set up the following plasma: Ohmic 0.4 s to 0.7 s RF 1 MW 0.7 s to 1.2 s For edge Thomson: vertical position scan 2 cm upwards 0.4 s to 0.7 s vertical position scan 2 cm downwards 0.9 s to 1.2 s for ECE: Btor wobbles at approx 0.6 s and 0.9 s target nl04 = 1.0 (18,19), 0.7 (21,22), 1.3 (23,25, Ohmic only) Summary: We had a late start (first good plasma 3:07 PM). Machine ran well once we got going. Nice long EDA's at 1 MW at target nl04 = 0.7 and 1.0 (n04 = 1.3 was essentially Ohmic). The primary edge diagnostics (including the new Kaiser spectrometer- helium beam) all worked. We have a range of conditions, ie different densities, Ohmic and EDA. We should have comparisons done before operation resumes two weeks hence. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:00:740PM |
| Author: To Be Determined |
| RUN SUMMARY: 990304 PHYS OP: R. PARKER PHYS RUN LEADERS: R. GRANETZ, S. PITCHER The run began by setting up shot 990303013, which produced a fizzle. This was diagnosed as due to the pumped-out walls which had been overnight conditioned by He ECDC, contrary to the D2 ECDC which had been requested. By increasing the fill gas to 8-9 10**-5 T, a good plasma was produced on the second shot. During the day, some tweaking of BR(t=0) was required as well as of the fill pressure. At the end of the day, BR(0) was set at only 0.5 mT. Of the 25 shots, 6 were fizzles, one failed due to a slippage in alternator speed and another due to failure to initiate EF4 after the alternator problem. The 17 successful shots conformed to the physics run leader's requests and mostly produced useful data. On the whole, the run was not remarkable from the operator's point of view, although it could be mentioned that there were no disruptions. |
| Session Leader Comments | |||
| Mar 4 1999 08:06:15:107AM | Robert Granetz | Run Plan for 990304: MP 216 -- Edge pedestal scaling with dIp/dt MP 226 -- Multi-diagnostic characterization of edge SL: R. Granetz/S. Pitcher PO: R. Parker Load PCS from shot 990303013 (0.8 MA, 5.4 T, 1.0e20 m-2), but with Btor ramps at 0.5 and 1.1 s. Turn RF on from t=0.45 (or even earlier) until t=1.20 s. Today's operation consists of two half-day runs. The goal of the first part of the day is to measure the dependence of the edge xray pedestal width on dIp/dt. We will operate at Ip=0.8, 1.0, and 1.2 MA, some with steady-state plasma current, and some with +/- 50 kA up/down ramps superimposed on Ip. We will also run at least one dynamic rampup shot. The toroidal field will have a small ramp on many shots to enable GPC edge pedestal measurements. The goal of the second half of the day is to obtain a complete set of edge profiles with all available diagnostics over a range of conditions. A consistency check will then be carried out between overlapping diagnostics. We wish to get data from ohmic, L-mode, ELMfree H-mode, and EDA H-mode plasmas. Small scans of the outer gap may be used to increase the resolution of some edge diagnostics. The TF will have a small ramp to enable GPC edge pedestal measurements. Small amounts of neon puffing may be required to enhance edge xray signals in ohmic and L-mode plasmas. | |
| Mar 4 1999 08:19:30:810AM | Robert Granetz | Engineering Setup for Thursday, 990304: Overnight ECDC in deuterium **Please install neon gas bottle in place of hydrogen bottle (need adapter). Load engineering from 990303001. 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 ******* Note: overnight ECDC was actually done in helium, not deuterium as requested. | |
| Mar 4 1999 09:49:48:983AM | 990304002 | Robert Granetz | Shot 02 -- Plasma. 0.8 MA steady-state. Long EDA H-mode. Good xray pedestal data. Next shot: load the up/down 0.8 MA ramping shot. |
| Mar 4 1999 10:23:30:403AM | 990304003 | Robert Granetz | Shot 03 -- Plasma. Good 0.8 MA up/down ramping shot. Peak-to-peak variation of Ip is about 70 kA, which is somewhat less than the 100 kA variation that we asked for. Xray pedestal widths definitely show a difference between + and - dIp/dt. Difference is consistent with dependence seen a year ago. Next shot: load the 1.0 MA steady-state shot. |
| Mar 4 1999 10:22:41:467AM | 990304004 | Robert Granetz | Shot 04 -- Plasma. Good 1.0 MA steady-state shot. EDA H-mode from t=0.75 to 1.1 s. Widths were reasonably constant, but not as steady as at 0.8 MA. Next shot: load the 1.0 MA oscillating shot. |
| Mar 4 1999 10:28:08:090AM | 990304005 | Robert Granetz | Shot 05 -- Fizzle. |
| Mar 4 1999 10:46:00:293AM | 990304006 | Robert Granetz | Shot 06 -- Fizzle. |
| Mar 4 1999 11:13:44:513AM | 990304007 | Robert Granetz | Shot 07 -- Plasma. Good 1.0 MA oscillating shot. EDA H-mode from t=0.62 to 1.2, with a short L-mode at 1.02 s. Outboard pedestal width varies with dIp/dt as expected. Top width is not as clear. Next shot: try 1.2 MA steady-state |
| Mar 4 1999 11:33:50:750AM | 990304008 | Robert Granetz | Shot 08 -- Plasma. Good 1.2 MA steady-state shot. Prf=1.0 MW. Two long EDA H-modes (close to being ELMfree). Edge xray emissivity amplitude increases with plasma current. The outboard width is noticeably narrower (1.6 mm) than at lower currents, as expected. Next shot: try 1.2 MA oscillating shot. |
| Mar 4 1999 11:50:42:763AM | 990304009 | Robert Granetz | Shot 09 -- Plasma. Good 1.2 MA oscillating shot. Prf=1.0 MW. Two long EDA H-modes. The xray pedestal widths didn't show much dependence on dIp/dt at this current. Next shot: retry the 0.8 MA oscillating shot, except put in some neon to enhance the edge xray signals. |
| Mar 4 1999 12:16:24:670PM | 990304010 | Robert Granetz | Shot 10 -- Plasma. Good 0.8 MA oscillating shot, but some of the magnetics data acquisition was corrupted, resulting in problems for EFIT. Also, there was only one short H-mode (1.0-1.2 s). Next shot: repeat with no changes. |
| Mar 4 1999 12:39:48:967PM | 990304011 | Robert Granetz | Shot 11 -- Plasma. Good 0.8 MA oscillating shot, but again there was only one short H-mode. Next shot: do a dynamic Ip ramp from 0.8 to 1.1 MA, with a B-field bump at the 0.8 MA level and another B-field bump at the 1.1 MA level. Also: no neon puff. |
| Mar 4 1999 12:50:33:543PM | 990304012 | Robert Granetz | Shot 12 -- Plasma. Good dynamic Ip ramp, but there were no H-modes. RF turned off at 0.9 s, and Prf=0.9-1.0 MW. Next shot: repeat, with 10% more RF power. |
| Mar 4 1999 01:46:44:500PM | 990304013 | Robert Granetz | Shot 13 -- Plasma. Good dynamic Ip ramp, with two H-modes which are at the times of the Bp bumps. The outboard pedestal width at the higher current is nearly a factor of 2 less than at the lower current. HOWEVER, the GPC and TS temperature pedestals show NO difference at the two currents (0.8 and 1.1 MA) !!! This confirms last year's findings, but on a single shot. End of my half of the run day. |
| Mar 4 1999 01:16:27:200PM | 990304014 | Spencer Pitcher | Second MiniProposal MP MP 226 -- Multi-diagnostic characterization of edge Ohmic 0.4 s to 0.7 s RF 1 MW 0.7 s to 1.2 s vertical position scan 2 cm upwards 0.4 s to 0.7 s vertical position scan 2 cm downwards 0.9 s to 1.2 s Btor wobbles at approx 0.6 s and 0.9 s Start at nl04 = 1.0 |
| Mar 4 1999 02:11:44:653PM | 990304015 | Spencer Pitcher | RF cut-off early no vertical motion target nl04 = 1.0 |
| Mar 4 1999 03:07:22:640PM | 990304018 | Spencer Pitcher | vertical motion target nl04 = 1.0 good EDA Kaiser background shot |
| Mar 4 1999 03:38:37:670PM | 990304019 | Spencer Pitcher | vertical motion target nl04 = 1.0 good EDA, identical to shot 18 Kaiser data shot |
| Mar 4 1999 03:39:05:903PM | 990304020 | Spencer Pitcher | vertical motion target nl04 = 0.7 fizzle Kaiser data shot |
| Mar 4 1999 03:59:25:420PM | 990304022 | Spencer Pitcher | vertical motion target nl04 = 0.7 Kaiser background shot |
| Mar 4 1999 04:14:12:950PM | 990304023 | Spencer Pitcher | vertical motion target nl04 = 1.3 Kaiser data shot |
| Mar 4 1999 05:01:29:983PM | 990304025 | Spencer Pitcher | vertical motion target nl04 = 1.3 Kaiser background shot |
| Physics Operator Comments | |||
| Mar 4 1999 09:30:27:200AM | 990304001 | Ron Parker | First shot was a fizzle. Current rose too quickly, probably because walls were pumped out due to overnight ECDC in Helium instead of deuterium as requested. Increase fill pressure about 20% for next shot . |
| Mar 4 1999 09:50:13:653AM | 990304003 | Ron Parker | Shot 002 was a good shot, even though there was a hesitation in the current rise. The walls should become loaded, which should slow down the current rise and improve early position. |
| Mar 4 1999 10:01:42:123AM | 990304003 | Ron Parker | This was a good shot, from startup viewpoint. Walls are becoming loaded and fill pressure may need to be reduced after one or two more shots. Current ramps caused enough outer gap movement to cause RF to lose coupling and the plasma to fall out of H-Mode. |
| Mar 4 1999 10:25:17:327AM | 990304004 | Ron Parker | Another good shot, startup remains good. Current was increased to 1 MA. |
| Mar 4 1999 10:37:01:263AM | 990304005 | Ron Parker | This shot was a fizzle. Suspicion is too much fill gas (walls have by now become loaded) and also that BR was too high at breakdown. Next shot will have fill pressure reduced to about 7 10-5 and BR reduced by .5 mT. |
| Mar 4 1999 10:56:31:903AM | 990304006 | Ron Parker | Also a fizzle. Maybe overshot on fill gas, from 8.5 down to 6.5. Plasma moved out early. Fill gas adjusted to give about 7.8 10-5 prefill. |
| Mar 4 1999 11:03:58:857AM | 990304007 | Ron Parker | Success. Parker now leaves for 1 hour and any fizzles during the next hour are not his responsibility. Wolfe taking over for Parker. On shot 7, we almost lost it outside at 18msec. Also, the Br is back to being too negative (-.002) For shot 8, put back the 24msec on pre-puff, leave Br alone and see if it comes back. Also, 10 Amps more positive on EF4 |
| Mar 4 1999 11:25:55:450AM | 990304008 | Ron Parker | Shot 8: Pre-puff to 24msec. EF4 from -1280 to -1270. Also in seg 2: Load the Ip wire from 990225022, a 1.2MA shot; and Put the first tf waggle at 0.7 instead of 0.5 plasma with H-modes. Wmhd=150kJ during the h-modes. with 1 - 1.2MW of RF Startup looks good, Br back close to zero at t=0. Next shot, 1.2MA shot with current oscillations. |
| Mar 4 1999 11:45:16:640AM | 990304009 | Ron Parker | Shot 9: Load Ip wire from cmod$models:[mhd.xtomo] shot 1200 ( a 1.2MA with 50ka ramps) Also, move rcur in by 2mm to increase outer gap ; it now ramps from .666 to .665 plasma, made it all the way through. Next shot, reload segment 2 from shot 3 and add a Neon puff (pg2) 50msec at .25sec |
| Mar 4 1999 12:04:29:780PM | 990304010 | Ron Parker | shot 10: reload segment 2 from 990304003 (800kA oscillating current.) Add a 50msec Ne puff (b-side upper, pg2) from .25 to .30sec plasma, 1-hmode starting at 1sec. TRAQ data corrupted, EFIT is garbage. No RF processed data. We are going to repeat this one. |
| Mar 4 1999 12:28:28:780PM | 990304011 | Ron Parker | Shot 11: Repeat of shot 10, hopefully with better H-mode, magnetics data Parker is back in the room and will be taking over again after this shot. Camac problems delayed shot. Shot went as planned. Good startup. |
| Mar 4 1999 12:49:20:403PM | 990304012 | Ron Parker | Shot 12: This will be R. Granetz' penultimate shot. Current plateaus at .8 MA, then rises to 1.2 MA. Small TF ramp at end of each plateau. No H Mode. Otherwise shot went as planned |
| Mar 4 1999 01:09:33:530PM | 990304013 | Ron Parker | Repeat of Shot 12, trying to squeeze out a little more RF power. Shot went well, but RF tripped prematurely during 2nd plateau. |
| Mar 4 1999 01:51:02:717PM | 990304014 | Ron Parker | Shot 14: S. Pitcher is now the Session Leader. RF Pulse now from 0.7 to 1.2. Plasma vertical position ramped up 2 cm between o.4 to 0.7 s, and down 2cm during 0.9 - 1.2 s. Field ramps during .5 to .6 by 8 kA and down during .6 to .7 s, repeated beginning at .8 s. Fizzle! |
| Mar 4 1999 02:09:26:700PM | 990304015 | Ron Parker | Shot 15: Set up as in shot 14. Lowered fill pressure about 10%. Shot ran well but didn't have desired vertical ramp because settings didn't load properly. |
| Mar 4 1999 02:16:11:670PM | 990304016 | Ron Parker | Shot 16. No Alternator, no power supplies, no plasma. Ran through sequence to prevent power supply problems on next shot. |
| Mar 4 1999 02:30:08:763PM | 990304017 | Ron Parker | Shot did not go because there was no EF4. Engineering Operator Error. |
| Mar 4 1999 04:00:26:467PM | 990304018 | Ron Parker | Shot ran as planned. 2 cm vertical motion programmed and executed. |
| Mar 4 1999 04:01:09:467PM | 990304019 | Ron Parker | Shot 19: repeat of shot 18. Shot ran well, identical to Shot 18. |
| Mar 4 1999 04:02:10:513PM | 990304020 | Ron Parker | Shot 20. Target density programmed to 0.7 10**14. Fizzle. Reduce BR to 0.5mT. |
| Mar 4 1999 03:57:09:233PM | 990304021 | Ron Parker | Shot 21: Shot ran as programmed, BR now 0.5 mT. |
| Mar 4 1999 04:06:53:780PM | 990304022 | Ron Parker | Shot 22: Repeat of shot 21. Dropped out of H-Mode early. Startup OK. |
| Mar 4 1999 04:29:47:170PM | 990304023 | Ron Parker | Bring density up to 1.3 10**20. Shot ran as planned, but no H-Mode. Many retries on RF, almost no flattop. |
| Mar 4 1999 04:45:41:357PM | 990304024 | Ron Parker | Shot 24: Same settings as shot 23. Fizzle! |
| Mar 4 1999 05:06:17:420PM | 990304025 | Ron Parker | Shot 25: Lowered prefill pressure to 7 10**-4. Started up OK. Ran well, but No H-Mode. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:07:25:450AM | Plasma | Ok | no faults/fizzel |
| 2 | 09:33:26:653AM | Plasma | Ok | no faults/plasma |
| 3 | 09:49:31:013AM | Plasma | Ok | no faults/plasma |
| 4 | 10:05:41:293AM | Plasma | Ok | no faults/plasma |
| 5 | 10:25:47:153AM | Plasma | Ok | no faults/fizzel |
| 6 | 10:42:20:233AM | Plasma | Ok | no faults/dud |
| 7 | 10:57:00:090AM | Plasma | Ok | no faults/plasma |
| 8 | 11:18:18:140AM | Plasma | Ok | no faults/plasma |
| 9 | 11:37:53:577AM | Plasma | Ok | nofaults/plasma |
| 10 | 11:59:31:200AM | Plasma | Ok | no faults/plasma |
| 11 | 12:20:41:390PM | Plasma | Ok | no faults/plasma |
| 12 | 12:42:22:170PM | Plasma | Ok | no faults/plasma |
| 13 | 01:05:18:983PM | Plasma | Ok | no faults/plasma |
| 14 | 01:36:57:060PM | Plasma | Ok | No Faults |
| 15 | 01:51:53:140PM | Plasma | Ok | No Faults / Plasma |
| 16 | 02:12:20:450PM | Plasma | Bad | Only a no power shot due to alternator low speed |
| 17 | 02:23:49:437PM | Plasma | Bad | No EF4, Power supply disabled |
| 18 | 02:38:53:733PM | Plasma | Ok | No Faults / Plasma |
| 19 | 03:06:19:170PM | Plasma | Ok | No Faults / Plasma |
| 20 | 03:25:47:513PM | Plasma | Ok | No Faults |
| 21 | 03:38:38:000PM | Plasma | Ok | No Faults/ plasma |
| 22 | 04:00:19:170PM | Plasma | Ok | No Faults / plasma |
| 23 | 04:20:59:717PM | Plasma | Ok | No Faults / Plasma |
| 24 | 04:43:34:903PM | Plasma | Ok | No Faults |
| 25 | 04:58:56:560PM | Plasma | Ok | No Faults / Plasma |