| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Brian Labombard |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Bill Cochran,Sam Pierson,Bill Parkin |
| Engineering Operator Run Comment |
| MP 409 (con't): SOL Phase Space (day 2) |
| Session Leader Plans |
| Entered: Mar 9 2005 10:05:00:627AM |
| Author: Brian Labombard |
| Run Plan for 1050309 MP#409 "SOL Phase space studies" - Day 2 Overall Goal Map out the 'phase space' of the SOL plasma, i.e. the relationships between the 'transport state' (profile shapes, gradients, cross-field fluxes, advection velocities, turbulence characteristics) and theory-based 'control parameters' (local collisionality, magnetic field strengths, parallel connection length,...) that may determine that state. Today's Goals We will continue from last Friday's run (1050304), attempting to finish data collection at Ip=0.8 MA, Bt=5.4 tesla in lower single null, pushing the density up. Then we will start collecting the data at Ip=0.4 MA, Bt=4.0 tesla and Ip=0.4 MA, Bt=2.7 tesla. Run Preparation Tasks (for probe diagnostics) - Reconfigure A14 and A12 digitizer connections to outer divertor probe array according to file: "put_new_fast_refs_2005_mar01.tcl" - Execute TCL>@put_new_fast_refs_2005_mar01.tcl - Configure ASP bias supplies: PA93 amplifiers ("DC supply") in standard sweep mode, "Sweep A" and "Sweep B" set to -200 volts - Use IDL code to switch ASP probe triggering and ASP/FMP power supply biases between one of two modes: "Scan" mode - ASP: N,S,E,W electrodes in current mode, "DC supply" Probe scanning three times during shot, 256k samples/channel FMP: OSD**.p0 probes in current mode, "Sweep B" supply OSD**.p1 probes in current mode, "DC -" supply OSD**.p2 probes in floating mode, "DC +" supply "Dwell" mode - ASP: W & S electrodes in current mode, "Sweep A" & "Sweep B" N & E electrodes in floating mode Probe in dwell mode, with 512k samples/channel FMP: OSD**.p0 probes in current mode, "DC -" supply OSD**.p1 probes in current mode, "DC -" supply OSD**.p2 probes in floating mode, "DC +" supply IDL code: mp409_scan.pro undwell_scan_asp.pro set_asp_pa93_sweep.pro set_fmp_sweep.pro mp409_dwell.pro dwell_scan_asp.pro set_asp_fluctuation_mp409.pro set_fmp_fluctuation_mp409.pro Run Preparation Tasks (for optical diagnostics) - Set integration time on Xybion to 1 ms - Connect the following fiber views for the fast diodes Outer SOL views 1-3,5,7,9-14,31-40 (total of 21) Innerwall SOL views B and C - Connect the following fiber views for the CHROMEX Outer SOL views 18-22,24-29 (total of 11) Innerwall SOL views A,D,E,F - otherwise known as 1,4-6 - Set timing on fastdiode digitizers to 0.1 s after the A-B limiter NINJA puff timing Plan Load from shot#1050304024. This shot ran on segment#2. It was a LSN discharge with Ip=0.8 MA, Bt= 5.4 tesla, NL04 = 0.9e20. Note: segment#3 has a USN program that we will use (Segment#4 is double-null? will not be used today.) Reprogram density to NL04=1.2e20 ASP, FSP, ISP programmed to scan at 0.65, 0.85, 1.05 seconds NINJA gas puff for GPI and boron V spectroscopy entering plasma at 1.1s Set NINJA for D2 puff at A-B limiter and B16-001. Plenum pressure of 10 PSI. Shots 1 LSN, NL04 = 1.2, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 2 USN, NL04 = 1.2, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s Note: If MARFES persist, then we will skip the USN discharges. 3 USN, NL04 = 1.4, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 4 LSN, NL04 = 1.4, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 5 Fill NINJA plenum with 40 PSI D2 Set Xybion gain for NL04=2.4 Puff through B16-001 (inner midplane capillary) trigger=0.5s, duration=0.9s (see shot#1021107016 as an example with 0.1s earlier trigger) LSN, program NL04=1.0 - flat, get: NL04=1.4 to 2.7, from 0.7 to 1.2 s Dwell mode,trigger=0.95 (dwell from 0.7 to 1.2s) 6 repeat 17: in Scan mode, with only ASP and ISP scanning at 0.8, 1.0, 1.2s NL04 ~ 1.6, 2.2, 2.7 7 repeat 18: in Scan mode, with deep ASP scan at 1.2 s NL04 ~2.7 Change to 0.4 MA, 4 tesla 8,9 LSN, NL04 = 0.5, Scan mode, optimize probe insertion NINJA puff at 1.1 s, fast camera at 1.25 s 10,11 USN, NL04 = 0.5, Scan mode, optimize probe insertion NINJA puff at 1.1 s, fast camera at 1.25 s 12 USN, NL04 = 0.4, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 13 LSN, NL04 = 0.4, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 14 LSN, NL04 = 0.3, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 15 USN, NL04 = 0.3, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 16 USN, NL04 = 0.2, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 17 LSN, NL04 = 0.2, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 18 LSN, NL04 = 0.6, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 19 USN, NL04 = 0.6, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 15 USN, NL04 = 0.7, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 16 LSN, NL04 = 0.7, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s Change to 0.4 MA, 2.7 tesla 17 LSN, NL04 = 0.5, Scan mode, optimize probe insertion NINJA puff at 1.1 s, fast camera at 1.25 s 18 USN, NL04 = 0.5, Scan mode, optimize probe insertion NINJA puff at 1.1 s, fast camera at 1.25 s 19 USN, NL04 = 0.4, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 20 LSN, NL04 = 0.4, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 21 LSN, NL04 = 0.3, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 22 USN, NL04 = 0.3, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 23 USN, NL04 = 0.2, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 24 LSN, NL04 = 0.2, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 25 LSN, NL04 = 0.6, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 26 USN, NL04 = 0.6, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 27 USN, NL04 = 0.7, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s 28 LSN, NL04 = 0.7, Scan mode NINJA puff at 1.1 s, fast camera at 1.25 s |
| Physics Operators Plans |
| Entered: Mar 8 2005 05:21:51:430PM |
| Author: Robert Granetz |
| Engineering setup for Tuesday, 09 Mar 2005 MP 409 (con't): SOL Phase Space (day 2) Session leader: B. Labombard Physics operator: R. Granetz Overnight ECDC in D2. Run begins at 10:30 and ends at 18:00. Power systems as on 1050304024, including A-coils Gas Setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 2 psi Ar Hybrid enabled (PG1) leave B-side upper with He3 Hybrid disabled fill (former) C-side with 30 psi D2 Hybrid enabled (PG3) leave J-bot Hybrid disabled (PG2) Disable NINJA, but fill the plenum with 10 psi D2. Torvac setup: GV1 closed; bypass to RGA open Torus gate valves closed for 5 minutes after shot Enable the following gate valves, assuming no vacuum problems: ECE Necessary diagnostics: Scanning probes, GPI (including fast diodes), Xybion imaging ------------------------------------------------------------------------------- RF Setup: Absolutely NO RF TODAY ! ------------------------------------------------------------------------------- Run plan: Start from 1050304024 (0.8 MA, 5.4 T, lower single null, nl_04=1.0e20 m-2), and plunge/probe away. During the day we will also run some upper null equilibria, and change the density, and change the toroidal field (to 4.0 T and 2.7 T) and plasma current. |
| Session Leader Summaries |
| Entered: Mar 9 2005 09:42:55:983PM |
| Author: Brian Labombard |
| Run Summary for 1050309 MP#409 "SOL Phase space studies" - Day 2 ___________________________________________________________________________________ A number of problems plagued the run today. We made very little progress towards the MP - only 4 shots were obtained with desired conditions. Shots 1-12 were either a fizzle or died very early (~0.2-0.5s), appearing to be gassed to death in most cases. Associated with this was a 'fireworks display' of UFOs, seen on WIDE1, LH, and JANT cameras. These seemed to indicate something (perhaps dust?) coming into the plasma mostly around D-port (but not associated with the LH launcher). One hypothesis was that the Thomson scattering calibration performed over the weekend was to blame. A thought was that the 500 torr of D2 partially filled up some trapped volume(s) behind gate valves and that this was causing D2 fueling, perhaps as a gate valve momentarily lurched in response to poloidal fields tickling its solenoid valve. We stopped to have the trapped volumes behind the E-top and E-bottom gate valves pumped out. A few shots later we got a full length plasma, although we may have gotten them anyway without doing the pump-out. The 'fireworks' persisted at a lower level even once we got full length discharges. The cause of the 'fireworks' is still a mystery, although it is tempting to blame it on dust that was stirred up by the Thomson D2 back-fill last weekend. We had numerous cell accesses and subsequent delays, one to check on the status of the Thomson alignment targets (ok). Thrown into the mix to elevate aggravation was a problem with the X server on the session leader's workstation (WS21 - not useable yet) and the death of a PLC crate controller for the F-port scanning probe just before the run. We then settled into a fizzle/plasma rhythm after shot 13 and got some moderately high density data points (NL04 ~ 1.2, 1.4) in LSN and USN - that's all. Quick shot summary 1-12 short plasmas. Unknown source of D2 gas input. Fireworks display. 13 - LSN, NL04=0.78, ISP, at 0.65, 0.85, 1.05 14 - Fizzle 15 - LSN, NL04=1.0-1.2, ASP(+6), FSP(+3), ISP, at 0.65, 0.85, 1.05 16 - Fizzle 17 - LSN, NL04=1.0-1.2, ASP(+6), FSP(+3), ISP, at 0.65, 0.85, 1.05 - good targeting, ASP, ISP a bit deep 18 - Fizzle 19 - USN, NL04=1.2, ASP(+6), FSP(+3), ISP, at 0.65, 0.85, 1.05 - targeting ok - it's MARFing and cold 20 - Fizzle 21 - LSN, NL04=1.1 to 1.5, ASP(+5), FSP(+3), ISP, at 0.65, 0.85, 1.05 - targeting ok 22 - Fizzle 23 - Fizzle |
| Physics Operator Summaries |
| Entered: Mar 9 2005 06:17:43:157PM |
| Author: Robert Granetz |
| Physop summary for Wednesday 09 March 2005: Things did not go smoothly today. We started off with very short, resistive, disruptive plasmas. These seemed to have a lot of deuterium gas puffing, even though it wasn't coming from any of the controlled gas valves. After shot 9 we finally guessed that trapped volumes behind gate valves might have been partially filled with D2 during the Thomson calibration on Sunday, when the torus was backfilled with 500 torr of D2. Apparently one or more of these gate valves was burping back some of this trapped deuterium gas during the pulse, which was causing our problems. Tommy Toland pumped out the trapped volumes, and this apparently solved the problem; we began getting full length plasmas on shot 13. With the new video cameras we saw showers of dust/particulates traveling in the counter-current direction in the divertor region, apparently coming from somewhere around E-bottom. This tended to decrease during the day. After we started getting full length plasmas, we then alternated between fizzles and plasmas for the remainder of the day. We had some upper and lower null plasmas at various densities, with NINJA puffing and scanning probes working, but very little was accomplished on the MP. To add to the difficulties, the computers/MDS had numerous meltdown problems during the first part of the run. Also, the F27 partial flux loop had some intermittent problems after disruptions. |
| Session Leader Comments | |||
| Mar 9 2005 11:05:07:957AM | 1050309001 | Brian Labombard | Shot 1 Died at 0.12s Load of gas in the vessel ~ 28 mtorr - something ablated? Can use this shot to cross-calibrate gauges at high pressure (if it is D2) |
| Mar 9 2005 03:44:28:347PM | 1050309013 | Brian Labombard | Shot 13 LSN, Ip=0.8 MA, Bt= 5.4 T, NL04=0.78 ISP scanning at 0.65, 0.85, 1.05s ASP - FSP - ISP - to sep Next: Go to NL04=1.2 |
| Mar 9 2005 04:22:03:427PM | 1050309015 | Brian Labombard | Shot 15 LSN, Ip=0.8 MA, Bt= 5.4 T, NL04=1.0, 1.1, 1.2 ISP scanning at 0.65, 0.85, 1.05s ASP - good, could be deeper FSP - good ISP - could be deeper Xybion camera saturated Next: repeat with 1mm smaller inner gap and xybion gain turned down |
| Mar 9 2005 04:46:24:440PM | 1050309017 | Brian Labombard | Shot 17 LSN, Ip=0.8 MA, Bt= 5.4 T, NL04=1.0-1.2 ISP scanning at 0.65, 0.85, 1.05s ASP - a bit deep FSP - ok ISP - to sep and beyond Xybion camera ok Next: go to USN at LN04=1.2 |
| Mar 9 2005 06:09:25:160PM | 1050309019 | Brian Labombard | Shot 19 USN, Ip=0.8 MA, Bt= 5.4 T, NL04=1.2 ISP scanning at 0.65, 0.85, 1.05s ASP - good targeting FSP - ok ISP - to sep Next: go to LSN at LN04=1.4 |
| Mar 9 2005 06:09:45:283PM | 1050309021 | Brian Labombard | Shot 19 LSN, Ip=0.8 MA, Bt= 5.4 T, NL04=1.1 to 1.5 ISP scanning at 0.65, 0.85, 1.05s ASP - good targeting FSP - could be deeper ISP - to sep Next: go to USN at NL04=1.4 |
| Physics Operator Comments | |||
| Mar 9 2005 11:03:53:970AM | 1050309001 | Robert Granetz | Plasma, but very short. It started disrupting at t=0.11 s. The "LH" camera view shows a shower of projectiles in the divertor. Next shot: try again, no changes. Note that the NINJA is enabled. |
| Mar 9 2005 12:05:25:550PM | 1050309002 | Robert Granetz | What happened to shot 2 ? |
| Mar 9 2005 12:05:54:363PM | 1050309003 | Robert Granetz | No power test. We're having lots of problems with computer/MDS meltdown. |
| Mar 9 2005 12:34:02:080PM | 1050309004 | Robert Granetz | Another short disruptive shot. More swarms of particulates showing up on the Wide-1 camera. Gas pressure looks fine until the disruption. I don't understand the reason for these early disruptions. Next shot: increase pre-fill by 2 ms, increase early preprogrammed gas puffing. |
| Mar 9 2005 01:10:36:347PM | 1050309005 | Robert Granetz | Slightly longer...finally disrupts at 0.25 s after becoming very resistive. Density climbs too quickly, but the valves are turned off. Earl reports D/H of 100%, but none of the valves seems to be malfunctioning, and the overall pressure is fine until the disruption We'll have a cell access to resurrect the WIDE-2 video view (F-port) Next shot: repeat, with WIDE-2 view |
| Mar 9 2005 01:28:46:597PM | 1050309006 | Robert Granetz | Another short, resistive, disruption. The JANT and WIDE-1 cameras are showing lots of molten stuff in the divertor traveling around toroidally (counter-current), but the WIDE-2 view doesn't see it. Next shot: switch to upper null to see if the lower divertor stuff goes away. (Switch on segment 3 and turn off segment 2). |
| Mar 9 2005 01:38:57:503PM | 1050309007 | Robert Granetz | Another short disruptive shot with lots of glowing stuff flying around the lower divertor region. The plasma disrupted just before the upper x-point would have formed, but it didn't seem to matter as far as the injections. I guess we might just have to try and burn off whatever is causing this. Next shot: go back to lower single null and bang away. |
| Mar 9 2005 01:57:38:940PM | 1050309008 | Robert Granetz | Getting longer, but still ugly. Huge density, even though the gas valve turns off (due to proper feedback). Lower single null, 0.7 MA. Disrupts at 0.54 s. Lots of hard x-rays. Next shot: bang away again |
| Mar 9 2005 02:34:47:240PM | 1050309009 | Robert Granetz | Plasma. Disrupted at 0.75 s. Density was nearly at the correct value this time. Still has runaways. Cell access for various purposes, including checking the TS to make sure that nothing was left amiss after this past weekend's calibrations. Tommy will pump out the trapped volumes behind the E-top and E-bottom gate valves. Perhaps these filled up with D2 during the high-pressure Thomson calibration on Sunday, and the gate valves are momentarily leaking during the shot. Steve Wolfe points out that this may also be blowing in dust from E-bottom, which is what we're seeing on the video views. Next shot: reduce nl_04 to 0.8e20 m-2 |
| Mar 9 2005 03:04:20:080PM | 1050309010 | Robert Granetz | Dud. And the data system may be hung. I'm just having too much fun today. Next shot: increase pre-fill pulse by 2 ms. |
| Mar 9 2005 03:17:22:863PM | 1050309011 | Robert Granetz | Dud again. Fields look okay. Pre-fill pressure is still lower than on shot 9 (most recent plasma). Next shot: increase pre-fill another 3 ms (to 26 ms). |
| Mar 9 2005 03:27:18:533PM | 1050309012 | Robert Granetz | Fizzle. Progress, sort of. Current rampup was too slow. Next shot: remove 1 ms from pre-fill and repeat. |
| Mar 9 2005 03:42:49:440PM | 1050309013 | Robert Granetz | Plasma. Good, full-length shot (finally). 0.8 MA, 5.4 T, nl=0.8e20 m-2 (as programmed), lower single null. Next shot: raise nl_04 to 1.2e20 m-2. Enable argon again. |
| Mar 9 2005 03:51:35:020PM | 1050309014 | Robert Granetz | Fizzle. Current rise was too slow. Next shot: back off another 1 ms on the pre-fill. |
| Mar 9 2005 04:17:58:597PM | 1050309015 | Robert Granetz | Plasma. Good shot. NINJA comes on at 1.1 s and ramps up the density. Next shot: decrease CLEARIN by 1 mm, keeping RCUR the same (so the outer gap will also decrease by 1 mm). |
| Mar 9 2005 04:27:48:270PM | 1050309016 | Robert Granetz | Fizzle. Might have been due to a flake-out of the F27 partial flux loop. But the loop was working again at the end of the shot. Next shot: reduce pre-fill by 1 ms. |
| Mar 9 2005 04:41:37:177PM | 1050309017 | Robert Granetz | Plasma. Good shot. Next shot: upper null, same density as the current shot (nl=1.2e20 m-2) |
| Mar 9 2005 05:08:19:067PM | 1050309018 | Robert Granetz | Fizzle. We've got a good plasma/fizzle/plasma alternating pattern here. Next shot: reduce Br by 0.5 mT and tweak pre-fill gas down a touch |
| Mar 9 2005 05:22:03:690PM | 1050309019 | Robert Granetz | Plasma. Upper null. Disrupted at 1.50 s Next shot: back to lower null, but raise nl to 1.4e20 m-2. Also reduce pre-fill puff another 1 ms. |
| Mar 9 2005 05:30:30:677PM | 1050309020 | Robert Granetz | Fizzle. Next shot: decrease pre-fill pulse another 1 ms |
| Mar 9 2005 05:48:06:113PM | 1050309021 | Robert Granetz | Plasma. Good shot. Lower null. nl=1.4e20 m-2 until NINJA turns on and pushes the density up to a disruption. Startup just barely made it. Next shot: take another 1 ms off the pre-fill. Upper null, same density as the current shot (nl=1.4e20 m-2). |
| Mar 9 2005 05:55:34:737PM | 1050309022 | Robert Granetz | Fizzle. The alternating pattern continues. Next shot: reduce pre-fill again. This will be the last shot of the run. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 10:52:24:613AM | Plasma | Ok | No power system faults |
| 3 | 12:02:58:877PM | Test | Ok | Data System Test Shot |
| 4 | 12:12:34:423PM | Plasma | Ok | |
| 5 | 12:37:28:127PM | Plasma | Ok | |
| 6 | 01:10:04:720PM | Plasma | Ok | |
| 7 | 01:29:05:770PM | Plasma | Ok | |
| 8 | 01:41:59:173PM | Plasma | Ok | |
| 9 | 01:58:28:740PM | Plasma | Ok | |
| 10 | 02:54:22:490PM | Plasma | Ok | |
| 11 | 03:07:19:817PM | Plasma | Ok | |
| 12 | 03:19:39:520PM | Plasma | Ok | |
| 13 | 03:32:27:393PM | Plasma | Ok | |
| 14 | 03:45:28:643PM | Plasma | Ok | |
| 15 | 04:08:56:080PM | Plasma | Ok | |
| 16 | 04:22:57:753PM | Plasma | Ok | |
| 17 | 04:35:33:067PM | Plasma | Ok | |
| 18 | 05:01:03:613PM | Plasma | Ok | |
| 19 | 05:13:22:173PM | Plasma | Ok | |
| 20 | 05:26:51:393PM | Plasma | Ok | |
| 21 | 05:39:19:863PM | Plasma | Ok | |
| 22 | 05:51:41:970PM | Plasma | Ok | |
| 23 | 06:04:27:300PM | Plasma | Ok | |