| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Brian Labombard |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Andy Pfeiffer,Bill Byford,Gary Dekow |
| Engineering Operator Run Comment |
| MP591 - Boundary layer heat transport experiments in H-mode plasmas Sess |
| Session Leader Plans |
| Entered: Mar 2 2010 12:06:33:833PM |
| Author: Brian Labombard |
| MP#591 - Boundary layer heat transport experiments in H-mode plasmas Primary goals for today are: (1) Record heat flux footprints of stationary 1MA EDA discharges with fixed and swept stike point. Vary ICRF power. (2) Compare footprints in LSN versus near DN discharges Setup: Overnight boronization with ECDC cleanup, using parameters identical to last boronization (evening of 02/22/10). NINJA will be used. Set up will be done at run-time by GPI scientists. ICRF up to 4.5 MW Cryopump will be used today. Shot Plan: Reload from shot#1100212007. This was a 1.0 MA, 5.4 tesla shot with a sweep programmed into RXL. Set L-mode target density to NL04 ~ 1.1e20 at RF turn-on Set ICRF on from 0.7 to 1.5 seconds. Condition RF as needed to 3.0 MW flattop. A. 1.0 MA, conditioning shots, L-mode target NL04~1.1e20 1. Establish steady EDA, PICRF~ 3.0 MW Multiple shots to condition RF to 3.0 MW and sweep strike point over divertor to remove boron layer. Optimize plasma shape, IR camera ~10 shots If necessary, we will use inner-wall fueling to help reduce the outer midplane pressures for better RF coupling. 2. Program fixed strike point. ~4 shots B. RF power scans NL04~1.1e20, ICRF Power: 2.0, 1.0, then 4.5 MW Used fixed and swept strike point shots. ~10 shots C. LSN-DN comparison Program SSEP sweep, similar to that in 1100224027 ICRF Power at 3.0 MW (or higher, if RF can sustain without trips) Optimize SSEP sweep for IR camera. Try various SSEP programs. ~8 shot |
| Physics Operators Plans |
| Entered: Mar 2 2010 07:33:27:057PM |
| Author: Robert Granetz |
Engineering setup for Wednesday 2010/03/03
MP591 - Boundary layer heat transport experiments in H-mode plasmas
Session leaders: B. LaBombard
Physics operator: R. Granetz
Overnight: standard boronization followed by 2 hours of ECDC in helium and
and then 1 hour of ECDC in D2, along with a 60 C bake
Run will start at 09:00 and end at 17:00.
Power systems as on 1100212007. (1.0 MA, 5.4 T, with a sweep programmed
into RXL.
A-coil configuration: +Dtop -Dbot -Jtop +Jbot; Enabled (standard
configuration)
Gas Setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 2 psi Ar Hybrid DISABLED (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3)
leave NINJA as is DISABLED
Enable the following gate valves and shutters, assuming no vacuum problems:
ECE, VUV, Z-bolo, HIREX-Sr
Torvac setup: keep gate valves open during PULSE
Specific diagnostics: edge and SOL diagnostics, divertor heat load
diagnostics including the IR camera
------------------------------------------------------------------------------
Impurity injector: no
Boronization: no between-shot boronization
ICRF Setup: up to 4.5 MW with all transmitter systems
LH Setup: no
DNB: no
Cryopump: yes, ready for the start of the run
------------------------------------------------------------------------------
Run plan: start from 1100212007, which was a 1.0 MA, 5.4 T shot with
a ramp programmed into RXL. Set nl_04 target to 1.1e20 m-2.
Run a bunch of shots until the RF and the divertor diagnostics
recover from the overnight boronization. Then begin filling in
the parameter matrix, i.e. scan RF power, SSEP, strike point
sweep.
|
| Session Leader Summaries |
| Entered: Mar 3 2010 09:46:19:503PM |
| Author: Brian Labombard |
| Run Summary for 1100303
MP#591 "Boundary layer heat transport experiments in H-mode plasmas" The primary goals of today's experiments were: (1) record heat flux footprints from the IR camera system in stationary EDA H-modes with 1 MA of plasma current under fixed and swept strike point conditions and (2) compare footprints in lower single null versus near double null discharges (1 MA conditions). Good progress was made towards these goals. It wasn't immediately obvious that we could in fact accomplish either of these goals today. Previously, we had found it difficult to produce stationary EDAs at the 1 MA level and had chose instead to back-off on plasma current so as to more readily access stationary EDAs and get some kind of data stream flowing. But today we stuck with 1 MA discharges all day, deciding to bang on them until they yielded to our demands. In the end, the plasma mostly ignored our demands but delivered some stationary H and L-modes for us to study nevertheless -- sometimes L-modes when we wanted H-modes and H-modes when we wanted L-modes -- just to show us who is boss. Following the usual recipe, we started with a fresh boronization, with many thanks to the overnight boronization team, who had to deal with some system failures, including vessel heater malfunctions at ~2 a.m. We used strike-point sweeps to clean off the divertor tiles in 1MA discharges as the RF conditioned up to the 3 MW level. By shot 11, RF was in good shape and the boron layer was sufficiently reduced on the outer divertor, yet the plasma was stuck in a limit-cycle behavior of producing multiple ELM-free type H-modes ending radiative collapses. In an attempt to break this behavior, we programmed the RF to turn on more softly, starting from the 1.5 MW level, ramping to 3 MW in 0.2 s and then held fixed thereafter. We also programmed the strike point to remain fixed in time. One or more of these tricks worked and we got some stationary EDAs (Shot#13, 14). We then varied the RF power level down (2MW, Shot#16) and up (4MW, Shot#17,18) ending with two shots with 4.8 MW of ICRF (Shot#19,20). Shot#19 was the best, with a steady EDA. Generally, we found that when we ran a repeat shot, the second shot tended to have higher radiative power and not support steady EDAs as well. Steve Wukitch noted that shot#19 set a new record for peak neutron production in C-Mod, for what that is worth. Yet, the heat flux footprints were nothing special, although reasonably well defined. Psol was just slightly over 2 MW at that time (which is subject to correction by Matt as bolometer signals are studied more closely); peak surface temperatures were in the 1200 C range. Following this sequence, we dialed the RF power down, looking to get a 1MA L-mode discharge to compare with a recently obtained 0.5 MA counterpart. The H-mode proved surprisingly hard to shake. Shot#25 exhibited a steady EDA with 1 MW ICRF, although the L-H transition was delayed. Shot#27 produced the desired L-mode (0.3 MW RF), which prepared conditions for the LSN-DN comparison discharges. The remainder of the run was dedicated to SSEP sweeps in 1 MA discharges. SSEP was swept from -1 cm to +0.5 cm over the time from 0.9 to 1.4 seconds. Starting in L-mode (0.3 MW ICRF), we gradually turned up the RF power shot-by-shot (Shot#28,29,30) with the intention of pushing back into H-modes. EDA returned, but at the 2 MW level now (Shot#32). Shot#33 was an attempt at higher ICRF power, but never got there, ending in an early disruption, ~0.6 seconds. The engineering crew kindly stayed after 5:00 pm to take this shot -- sorry it was not as exciting as imagined that it would be by the session leader. Overall, I would say that we made good progress toward filling in the heat flux footprint database for 1.0 MA, 5.4 tesla discharges, despite having to deal with the damaged tungsten tile on the outer divertor and the generally high level of radiated power that has now become common so late in this FY09/10 run campaign, even in these boronized discharges. Shot Log 1-fizzle 2-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 at RF turn-on ICRF ~1.2 MW (J), E+D tiny G-side_rat 1 to 2 mtorr L-mode swept strike point beyond probe#8 probes have boron coating Prad foil 2pi ~0.8 MW Thermocouple data ok. Two integration times on IR camera, video is locked 3-EF2L supply was not enabled 4-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 at RF turn-on ICRF ramping to 3.3 MW G-side_rat to 2 mtorr late 2 H-modes, second is EDA-like swept strike point beyond probe#8 probes have boron coating Prad foil 2pi ~2.8 MW Thermocouple data ok. One integration time on IR camera, video is locked 5-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 at RF turn-on disrupts at 1 s ICRF ~3.3 MW G-side_rat to 1 mtorr 2 H-modes, EDA-like swept strike point beyond probe#8 probes still have boron coating Prad foil 2pi ~2.5 MW not counting injections Thermocouple data ok. One integration time on IR camera, video is NOT locked 6-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 at RF turn-on ICRF up to ~4 MW at times, tripping G-side_rat to 0.6 mtorr Multiple H-modes swept strike point beyond probe#8 probes still have boron coating Prad foil 2pi ~ >3 MW at times Thermocouple data ok. One integration time on IR camera, video is locked 7-LSN, 5.4 tesla, 1.0 MA, NL04~1.2 at RF turn-on ICRF up to ~3.5 MW at times, tripping G-side_rat to 0.8 mtorr 3 H-modes swept strike point beyond probe#8 probes still have boron coating Prad foil 2pi ramps to ~3 MW at times 8-LSN, 5.4 tesla, 1.0 MA, NL04~1.3 at RF turn-on ICRF up to ~3.5 MW, some trips G-side_rat to 1.0 mtorr 3 H-modes swept strike point beyond probe#8 probes are cleaning up Prad foil 2pi ramps to ~3.5 MW 9-LSN, 5.4 tesla, 1.0 MA, NL04~1.3 at RF turn-on ICRF up to ~3.5 MW, some trips G-side_rat to 1.0 mtorr 3 H-modes again swept strike point beyond probe#8 Prad foil 2pi ramps to ~3.2 MW 10-LSN, 5.4 tesla, 1.0 MA, NL04~1.3 program - early disruption strike point sweep still 11-LSN, 5.4 tesla, 1.0 MA, NL04~1.3 at RF turn-on ICRF ~3 MW G-side_rat to 1.1 mtorr 4 H-modes, radiation collapse limit cycles swept strike point beyond probe#8 Probe#8 is not reporting on this shot Prad foil 2pi ramps to ~3 MW 12-LSN, 5.4 tesla, 1.0 MA, NL04~1.3 program - early disruption 13-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 3 MW at 0.8 to 1.1s then held steady G-side_rat peaks 1 mtorr Steady EDA - good shot Fixed strike point Probe#8 is not reporting on this shot Prad foil 2pi slow-ramps to ~2.7 MW by end of H-mode 14-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 3 MW at 0.8 to 1.0s then held steady G-side_rat peaks 1.1 mtorr Steady EDA until 1.4 seconds - good shot Fixed strike point Probe#8 gain is too low. It trips out during shot. Prad foil 2pi slow-ramps to ~2.2 MW near end of H-mode, then spikes 15-LSN, 5.4 tesla, 1.0 MA - early disruption 16-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 2 MW at 0.8 to 1.0s then held steady G-side_rat not reporting A steady EDA until 1.1 seconds when radiation catches up to it; 2 H-modes after. Fixed strike point Probe#8 gain is screwed up. trips out again. Prad foil 2pi ramps to ~2.4 MW quenching H-mode 17-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 4 MW at 0.8 to 1.0s then held steady G-side_rat ~1.1 mtorr Steady EDA NL04~2.4 Fixed strike point Probe#8 gain needs further adjusting. Prad foil 2pi ramps to ~3 MW 18-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 4 MW at 0.8 to 1.0s then held steady G-side_rat ~1 mtorr Steady EDA NL04~2.4 Fixed strike point Probe#8 gain needs further adjusting. Prad foil 2pi ramps to ~3.2 MW 19-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 4.8 MW at 0.8 to 1.0s then held steady G-side_rat ~1.1 mtorr Steady EDA NL04~2.5 - good shot Fixed strike point Probe#8 is operating on this shot. Prad foil 2pi ramps to ~3.5 MW 20-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 4.8 MW at 0.8 to 1.0s then attempt to hold steady G-side_rat ~1.1 mtorr 3 Short-lived EDAs, RF trips during H-L and L-modes Fixed strike point Probe#8 is operating again on this shot. Prad foil 2pi ramps to ~4 MW, quenching H-modes 21-LSN, 5.4 tesla, 1.0 MA, NL04~1.5 at RF turn-on ICRF ramp 0.7 to 1.6 MW at 0.8 to 1.0s then held steady G-side_rat ~1.5 mtorr Steady EDA - good shot Prad foil 2pi ramps to ~1.8 MW 22-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 3 MW at 0.8 to 1.0s then held steady G-side_rat not reporting. Steady EDA until 1.36 s Prad foil 2pi ramps to ~2.7 MW 23-LSN, 5.4 tesla, 1.0 MA, NL04~1.2 at RF turn-on ICRF ramp 1.5 to 3 MW at 0.6 to 0.8s then held steady G-side_rat ~ 1 mtorr Steady EDA starting at 0.78 seconds L-mode before that with ~3 MW ICRF Prad foil 2pi ramps to ~2.6 MW 24-LSN, 5.4 tesla, 1.0 MA, NL04~1.2 at RF turn-on ICRF 1.7 MW at 0.6 G-side_rat ~ 0.6 mtorr 3 EDAs Prad foil 2pi ramps to ~2 MW each time, quenching H-modes 25-LSN, 5.4 tesla, 1.0 MA, NL04~1.2 at RF turn-on ICRF 1 MW at 0.6 Steady EDA starting at 0.87 seconds, ICRF L-mode before that G-side_rat ~ 1.3 mtorr Prad foil 2pi ramps to ~2 MW each time, quenching H-modes 26-LSN, 5.4 tesla, 1.0 MA, NL04~1.2 at RF turn-on ICRF 0.6 MW at 0.6 L-mode, short EDA, L-mode (with density pumping out), followed by EDA again G-side_rat ~ 1 then ramping to 1.8 mtorr Prad foil 2pi ~ 1 MW 27-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 ICRF 0.3 MW at 0.6 L-mode G-side_rat ~ 0.6 to 2 mtorr Prad foil 2pi ~ 0.6 MW Start SSEP Sweeps 28-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 ICRF 0.3 MW at 0.6 L-mode SSEP sweep, -1 cm to 0 from 0.9 to 1.4 s G-side_rat ~ 0.6 to 2.4 mtorr Prad foil 2pi ~ 0.6 MW 29-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 ICRF 0.3 MW at 0.6 L-mode SSEP sweep, -1 cm to +0.5 cm from 0.9 to 1.4 s G-side_rat ~ 0.6 to 2.4 mtorr Prad foil 2pi ~ 0.6 MW 30-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 to 1.3 ICRF 1.1 MW at 0.6 L-mode SSEP sweep, -1 cm to 0.5 from 0.9 to 1.4 s G-side_rat up to 1.6 mtorr Prad foil 2pi ~ 0.6 MW 31-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 to 1.4 ICRF 2 MW at 0.6, drops to 1.5 MW at 1.3 seconds L-mode SSEP sweep, -1 cm to 0.5 from 0.9 to 1.4 s G-side_rat up to 1.6 mtorr Prad foil 2pi ~ very noisy 32-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 to 1.4 ICRF 2 MW, small trips EDA at 0.98 seconds, disrupts right at double null SSEP sweep, -1 cm to 0.5 from 0.9 to 1.4 s G-side_rat not reporting Prad foil 2pi ~ very noisy 33-LSN, 5.4 tesla, 1.0 MA - disrupts at 0.6 seconds Something falls at 0.46 seconds |
| Physics Operator Summaries |
| Entered: Mar 3 2010 05:02:37:693PM |
| Author: Robert Granetz |
Run summary for Wednesday 2010/03/03
MP591 - Boundary layer heat transport experiments in H-mode plasmas
Session leaders: B. LaBombard
Physics operator: R. Granetz
The tokamak, cryopump, and RF systems worked quite well today. Most
shots were full length discharges. We spent the first 10 shots doing
post-boronization recovery for the divertor diagnostics and the RF, and
then ran a range of RF powers, mostly in EDA H-modes. During the latter
portion of the run we did SSEP scans (ZCUR) to go from LSN to DN to USN
during a discharge.
Scorecard: 31 plasmas
1 dud (Engops accidently disabled EF2L)
1 fizzle
0 power supply tests
0 no-power MDS shot cycles
--------------
Total: 33 shot cycles
|
| Session Leader Comments | |||
| Mar 3 2010 09:32:06:290AM | 1100303002 | Brian Labombard | 2-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 at RF turn-on ICRF ~1.2 MW (J), E+D tiny G-side_rat 1 to 2 mtorr L-mode swept strike point beyond probe#8 probes have boron coating Prad foil 2pi ~0.8 MW Thermocouple data ok. Two integration times on IR camera, video is locked |
| Mar 3 2010 10:01:52:903AM | 1100303004 | Brian Labombard | 4-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 at RF turn-on ICRF ramping to 3.3 MW G-side_rat to 2 mtorr late 2 H-modes, second is EDA-like swept strike point beyond probe#8 probes have boron coating Prad foil 2pi ~2.8 MW Thermocouple data ok. One integration time on IR camera, video is locked |
| Mar 3 2010 10:18:14:627AM | 1100303005 | Brian Labombard | 5-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 at RF turn-on disrupts at 1 s ICRF ~3.3 MW G-side_rat to 1 mtorr 2 H-modes, EDA-like swept strike point beyond probe#8 probes still have boron coating Prad foil 2pi ~2.5 MW not counting injections Thermocouple data ok. One integration time on IR camera, video is NOT locked |
| Mar 3 2010 10:47:15:817AM | 1100303006 | Brian Labombard | 6-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 at RF turn-on ICRF up to ~4 MW at times, tripping G-side_rat to 0.6 mtorr Multiple H-modes swept strike point beyond probe#8 probes still have boron coating Prad foil 2pi ~ >3 MW at times Thermocouple data ok. One integration time on IR camera, video is locked |
| Mar 3 2010 10:52:11:617AM | 1100303007 | Brian Labombard | 7-LSN, 5.4 tesla, 1.0 MA, NL04~1.2 at RF turn-on ICRF up to ~3.5 MW some trips G-side_rat to 0.8 mtorr 3 H-modes swept strike point beyond probe#8 probes still have boron coating Prad foil 2pi ramps to ~3 MW at times |
| Mar 3 2010 11:04:40:960AM | 1100303008 | Brian Labombard | 8-LSN, 5.4 tesla, 1.0 MA, NL04~1.3 at RF turn-on ICRF up to ~3.5 MW, some trips G-side_rat to 1.0 mtorr 3 H-modes swept strike point beyond probe#8 probes are cleaning up Prad foil 2pi ramps to ~3.5 MW |
| Mar 3 2010 11:15:13:427AM | 1100303009 | Brian Labombard | 9-LSN, 5.4 tesla, 1.0 MA, NL04~1.3 at RF turn-on ICRF up to ~3.5 MW, some trips G-side_rat to 1.0 mtorr 3 H-modes again swept strike point beyond probe#8 Prad foil 2pi ramps to ~3.2 MW Go to fixed strike point next |
| Mar 3 2010 11:48:55:170AM | 1100303010 | Brian Labombard | 10-LSN, 5.4 tesla, 1.0 MA, NL04~1.3 program - early disruption |
| Mar 3 2010 12:17:49:340PM | 1100303011 | Brian Labombard | 11-LSN, 5.4 tesla, 1.0 MA, NL04~1.3 at RF turn-on ICRF ~3 MW G-side_rat to 1.1 mtorr 4 H-modes, radiation collapse limit cycles swept strike point beyond probe#8 Prad foil 2pi ramps to ~3 MW Probe#8 breaker pulled. No data from that probe. |
| Mar 3 2010 12:19:25:517PM | 1100303012 | Brian Labombard | 12-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 program - early disruption |
| Mar 3 2010 12:34:40:347PM | 1100303013 | Brian Labombard | 13-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 3 MW at 0.8 to 1.1s then held steady G-side_rat peaks 1 mtorr Steady EDA - good shot Fixed strike point Probe#8 is not reporting on this shot Prad foil 2pi slow-ramps to ~2.7 MW by end of H-mode |
| Mar 3 2010 12:44:49:670PM | 1100303014 | Brian Labombard | 14-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 3 MW at 0.8 to 1.0s then held steady G-side_rat peaks 1.1 mtorr Steady EDA until 1.4 seconds - good shot Fixed strike point Probe#8 has developed a short. It tripped out again. Prad foil 2pi slow-ramps to ~2.2 MW near end of H-mode, then spikes |
| Mar 3 2010 12:59:54:547PM | 1100303015 | Brian Labombard | 15-LSN, 5.4 tesla, 1.0 MA - early disruption |
| Mar 3 2010 01:00:45:843PM | 1100303016 | Brian Labombard | 16-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 2 MW at 0.8 to 1.0s then held steady G-side_rat not reporting one steady EDA until 1.1 seconds when radiation catches up to it; 2 H-modes after. Fixed strike point Probe#8 gain is screwed up. trips out again. Prad foil 2pi ramps to ~2.4 MW quenching H-mode |
| Mar 3 2010 01:34:35:757PM | 1100303017 | Brian Labombard | 17-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 4 MW at 0.8 to 1.0s then held steady G-side_rat ~1.1 mtorr Steady EDA NL04~2.4 - good shot Fixed strike point Probe#8 gain needs further adjusting. Prad foil 2pi ramps to ~3 MW |
| Mar 3 2010 01:58:34:740PM | 1100303018 | Brian Labombard | 18-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 4 MW at 0.8 to 1.0s then held steady G-side_rat ~1 mtorr Steady EDA NL04~2.4 Fixed strike point Probe#8 gain needs further adjusting. Prad foil 2pi ramps to ~3.2 MW |
| Mar 3 2010 02:00:16:773PM | 1100303019 | Brian Labombard | 19-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 4.8 MW at 0.8 to 1.0s then held steady G-side_rat ~1.1 mtorr Steady EDA NL04~2.5 - good shot Fixed strike point Probe#8 is operating on this shot. Prad foil 2pi ramps to ~3.5 MW |
| Mar 3 2010 02:01:55:163PM | 1100303020 | Brian Labombard | 20-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 4.8 MW at 0.8 to 1.0s then attempt to hold steady G-side_rat ~1.1 mtorr 3 Short-lived EDAs, RF trips during H-L and L-modes Fixed strike point Probe#8 is operating again on this shot. Prad foil 2pi ramps to ~4 MW, quenching H-modes |
| Mar 3 2010 02:53:23:410PM | 1100303021 | Brian Labombard | 21-LSN, 5.4 tesla, 1.0 MA, NL04~1.5 at RF turn-on ICRF ramp 0.7 to 1.6 MW at 0.8 to 1.0s then held steady G-side_rat ~1.5 mtorr Steady EDA - good shot Prad foil 2pi ramps to ~1.8 MW |
| Mar 3 2010 02:53:45:223PM | 1100303022 | Brian Labombard | 22-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 at RF turn-on ICRF ramp 1.5 to 3 MW at 0.8 to 1.0s then held steady G-side_rat not reporting. Steady EDA until 1.36 s Prad foil 2pi ramps to ~2.7 MW |
| Mar 3 2010 02:54:01:710PM | 1100303023 | Brian Labombard | 23-LSN, 5.4 tesla, 1.0 MA, NL04~1.2 at RF turn-on ICRF ramp 1.5 to 3 MW at 0.6 to 0.8s then held steady G-side_rat ~ 1 mtorr Steady EDA starting at 0.78 seconds L-mode before that with ~3 MW ICRF Prad foil 2pi ramps to ~2.6 MW |
| Mar 3 2010 02:54:16:117PM | 1100303024 | Brian Labombard | 24-LSN, 5.4 tesla, 1.0 MA, NL04~1.2 at RF turn-on ICRF ramp 1.7 MW at 0.6 G-side_rat ~ 0.6 mtorr 3 EDAs Prad foil 2pi ramps to ~2 MW each time, quenching H-modes |
| Mar 3 2010 04:53:23:090PM | 1100303025 | Brian Labombard | 25-LSN, 5.4 tesla, 1.0 MA, NL04~1.2 at RF turn-on ICRF 1 MW at 0.6 Steady EDA starting at 0.87 seconds, ICRF L-mode before that G-side_rat ~ 1.3 mtorr Prad foil 2pi ramps to ~2 MW each time, quenching H-modes |
| Mar 3 2010 04:53:35:510PM | 1100303026 | Brian Labombard | 26-LSN, 5.4 tesla, 1.0 MA, NL04~1.2 at RF turn-on ICRF 0.6 MW at 0.6 L-mode, short EDA, L-mode (with density pumping out), followed by EDA again G-side_rat ~ 1 then ramping to 1.8 mtorr Prad foil 2pi ~ 1 MW |
| Mar 3 2010 04:54:07:170PM | 1100303027 | Brian Labombard | 27-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 ICRF 0.3 MW at 0.6 L-mode G-side_rat ~ 0.6 to 2 mtorr Prad foil 2pi ~ 0.6 MW |
| Mar 3 2010 04:54:19:073PM | 1100303028 | Brian Labombard | 28-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 ICRF 0.3 MW at 0.6 L-mode SSEP sweep, -1 cm to 0 from 0.9 to 1.4 s G-side_rat ~ 0.6 to 2.4 mtorr Prad foil 2pi ~ 0.6 MW |
| Mar 3 2010 04:54:36:497PM | 1100303029 | Brian Labombard | 29-LSN, 5.4 tesla, 1.0 MA, NL04~1.4 ICRF 0.3 MW at 0.6 L-mode SSEP sweep, -1 cm to +0.5 cm from 0.9 to 1.4 s G-side_rat ~ 0.6 to 2.4 mtorr Prad foil 2pi ~ 0.6 MW |
| Mar 3 2010 04:54:50:027PM | 1100303030 | Brian Labombard | 30-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 to 1.3 ICRF 1.1 MW at 0.6 L-mode SSEP sweep, -1 cm to 0.5 from 0.9 to 1.4 s G-side_rat up to 1.6 mtorr Prad foil 2pi ~ 0.6 MW |
| Mar 3 2010 04:55:01:513PM | 1100303031 | Brian Labombard | 31-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 to 1.4 ICRF 2 MW at 0.6, drops to 1.5 MW at 1.3 seconds L-mode SSEP sweep, -1 cm to 0.5 from 0.9 to 1.4 s G-side_rat up to 1.6 mtorr Prad foil 2pi ~ very noisy |
| Mar 3 2010 05:13:48:457PM | 1100303032 | Brian Labombard | 32-LSN, 5.4 tesla, 1.0 MA, NL04~1.1 to 1.4 ICRF 2 MW, small trips EDA at 0.98 seconds, disrupts right at double null SSEP sweep, -1 cm to 0.5 from 0.9 to 1.4 s G-side_rat not reporting Prad foil 2pi ~ very noisy |
| Mar 3 2010 05:18:07:883PM | 1100303033 | Brian Labombard | 33-LSN, 5.4 tesla, 1.0 MA - disrupts at 0.6 seconds Something falls at 0.46 seconds |
| Physics Operator Comments | |||
| Mar 2 2010 09:16:48:173PM | Robert Granetz | Loaded seg 1 from seg 1 of 1100223001 (first shot of my similar run last week with the cryopump. Loaded seg 2,3,4 from 1100212007, as per session leader's plan. Confirmed that nl_04 was already set to 1.1e20 m-2, and that Ip was set to 1 MA. Tweaked BTOR to 150 kA (5.4 T). It had been 148 kA. Loaded this shot into model the night before the run, and also saved it in /home/granetz/pcs_scratch as shot 1100303000. | |
| Mar 3 2010 06:59:25:760AM | Robert Granetz | Due to a problem with a faulty thermocouple in the wee hours of the morning, the boronization was interupted for more than an hour. This means that the helium ECDC and D2 ECDC this morning will have to be shortened significantly if the run is going to start on time. It also means that the cryopump startup may be delayed, since it can't cool down until ECDC is finished. | |
| Mar 3 2010 09:00:35:927AM | Robert Granetz | At Amanda's request, I have tweaked the BTOR current back to 148 kA (prior to the first shot). | |
| Mar 3 2010 09:00:42:880AM | Robert Granetz | We're going to run the first shot without the cryopump (because it's still cooling down). So I have set the pre-fill pulse duration to 25 ms (from 52 ms). | |
| Mar 3 2010 09:00:49:083AM | Robert Granetz | Lower the B-side-lower argon plenum pressure to 1 psi (from 2 psi). Enable B-side-lower for the first shot. Confirmed that PG1 programming is 0.30-0.35 s, at Matt Reinke's request. | |
| Mar 3 2010 09:09:33:280AM | 1100303001 | Robert Granetz |
Shot 01 -- Fizzle. Fields look okay. Fill pressure was on the high end of the normal range. (Cryopump
was not on.)
Next shot: cryopump will be on, so I will increase the pre-fill pulse to 52 ms
|
| Mar 3 2010 09:31:30:493AM | 1100303002 | Robert Granetz |
Shot 02 -- Plasma, disrupted at t=1.54 s due to a vertical instability. OH2L was close to its PLC rail.
1 MA, 5.4 T, LSN, RXL ramp, cryopump on. J-port worked well; D & E didn't.
Next shot: increase PLC limit for OH2s to [-30 kA, 30 kA].
|
| Mar 3 2010 09:35:56:390AM | 1100303003 | Robert Granetz | Shot 03 -- Dud. No EF2L. Engops error. Next shot: try again, no changes |
| Mar 3 2010 09:53:20:970AM | 1100303004 | Robert Granetz |
Shot 04 -- Plasma, full length. 1.0 MA, 5.4 T, 1.1e20 m-2 (target), LSN, cryopump on. RXL ramp.
D,E, & J ran.
Next shot: tweak Ip to get to flattop slightly sooner.
|
| Mar 3 2010 10:09:38:727AM | 1100303005 | Robert Granetz |
Shot 05 -- Plasma, disrupted at t=0.98 s. Lots of high-Z radiation. 1.0 MA, 5.4 T, 1.1e20 m-2 (target),
LSN, cryopump on. RXL ramp. D,E, & J ran.
Next shot: no DPCS changes; continue post-boronization conditioning
|
| Mar 3 2010 10:25:21:337AM | 1100303006 | Robert Granetz |
Shot 06 -- Plasma, full length. 1.0 MA, 5.4 T, 1.1e20 m-2 (target), LSN, cryopump on. RXL ramp.
D,E, & J ran up to 4 MW, but lots of faulting. Many short H-modes; high Prad.
Next shot: increase nl_04 to 1.2e20 m-2; continue post-boronization conditioning
|
| Mar 3 2010 10:43:28:890AM | 1100303007 | Robert Granetz |
Shot 07 -- Plasma, full length. 1.0 MA, 5.4 T, 1.2e20 m-2 (target), LSN, cryopump on. RXL ramp.
D,E, & J ran up to 3.5 MW, not much faulting. 3 longer ELMfree; high Prad.
Next shot: increase nl_04 to 1.3e20 m-2; continue post-boronization conditioning
|
| Mar 3 2010 10:55:18:810AM | 1100303008 | Robert Granetz |
Shot 08 -- Plasma, full length. 1.0 MA, 5.4 T, 1.2e20 m-2 (target), LSN, cryopump on. RXL ramp.
D,E, & J ran up to 3.5 MW, not much faulting. 3 longer ELMfree; high Prad.
Bad startup.
Next shot: reduce pre-fill by 3 ms; increase nl_04 to 1.4e20 m-2
|
| Mar 3 2010 11:14:03:957AM | 1100303009 | Robert Granetz |
Shot 09 -- Plasma, full length. 1.0 MA, 5.4 T, 1.3e20 m-2 (target), LSN, cryopump on. RXL ramp.
D,E, & J ran up to 3.5 MW, not much faulting. 3 longer ELMfree H-modes; high Prad.
Bad startup still.
Next shot: decrease pre-fill another 2 ms; stop RXL ramp, keeping it at the value it
had at t=0.8 s
|
| Mar 3 2010 11:19:46:807AM | 1100303010 | Robert Granetz |
Shot 10 -- Plasma, disrupted at t=0.46 s, due to an impurity injection, I think.
Startup was better.
Next shot: no DPCS changes
|
| Mar 3 2010 11:47:53:777AM | 1100303011 | Robert Granetz |
Shot 11 -- Plasma, full length. 1.0 MA, 5.4 T, 1.3e20 m-2 (target), LSN, cryopump on.
D,E,J at 3.5 MW; several ELMfree H-modes; High Prad
RXL was still swept because I forgot to load the change into the DPCS model.
Next shot: no DPCS changes
|
| Mar 3 2010 11:49:31:887AM | 1100303012 | Robert Granetz | Shot 12 -- Plasma, disrupted at t=0.39 s due to a big injection. Next shot: try again |
| Mar 3 2010 12:18:22:937PM | 1100303013 | Robert Granetz |
Shot 13 -- Plasma, full length. 1.0 MA, 5.4 T, 1.4e20 m-2, LSN, cryopump on; D,E,J at 3.1 MW, no faults.
Long EDA H-mode (finally).
Next shot: move RXL +5 mm outward (to raise strikepoint)
|
| Mar 3 2010 12:24:45:427PM | 1100303014 | Robert Granetz |
Shot 14 -- Plasma, full length. 1.0 MA, 5.4 T, 1.4e20 m-2 (target), LSN, cryopump on. D,E,J at 3.1 MW.
Long EDA H-mode. Bad startup.
Next shot: no DPCS changes
|
| Mar 3 2010 12:42:12:417PM | 1100303015 | Robert Granetz | Shot 15 -- Plasma, disrupted at t=0.47 s due to an injection Next shot: tweak early RXL programming |
| Mar 3 2010 12:56:24:403PM | 1100303016 | Robert Granetz |
Shot 16 -- Plasma, full length. 1.0 MA, 5.4 T, 1.4e20 m-2 (target), LSN, cryopump on. D,E,J at 2.0 MW.
Short EDA, then a couple of ELMfree H-modes.
Next shot: no DPCS changes; increase Prf to 4 MW
|
| Mar 3 2010 01:04:17:490PM | 1100303017 | Robert Granetz |
Shot 17 -- Plasma, full length. 1.0 MA, 5.4 T, 1.4e20 m-2 (target), LSN, cryopump on. D,E,J at 3.9 MW,
no faults; one long EDA.
Next shot: no DPCS changes
|
| Mar 3 2010 01:26:26:577PM | 1100303018 | Robert Granetz |
Shot 18 -- Plasma, full length. 1.0 MA, 5.4 T, 1.4e20 m-2 (target), LSN, cryopump on. D,E,J at 3.9 MW,
no faults; one long EDA.
Next shot: no DPCS changes
|
| Mar 3 2010 01:38:07:510PM | 1100303019 | Robert Granetz |
Shot 19 -- Plasma, full length. 1.0 MA, 5.4 T, 1.4e20 m-2 (target), LSN, cryopump on. D,E,J at 4.8 MW,
no faults; one long EDA.
Next shot: no DPCS changes
|
| Mar 3 2010 01:57:00:080PM | 1100303020 | Robert Granetz |
Shot 20 -- Plasma, full length. 1.0 MA, 5.4 T, 1.4e20 m-2 (target), LSN, cryopump on. D,E,J at 4.8 MW,
but lots of faulting; severa ELMfree H-modes
Next shot: increase nl_04 to 1.5e20 m-2; reduce Prf to 3 MW
|
| Mar 3 2010 02:13:45:397PM | 1100303021 | Robert Granetz |
Shot 21 -- Plasma, full length. 1.0 MA, 5.4 T, 1.5e20 m-2 (target), LSN, cryopump on. D,E at 1.5 MW,
no J. Still got a long EDA H-mode though.
Next shot: set nl_04 back down to 1.4e20 m-2
|
| Mar 3 2010 02:28:42:023PM | 1100303022 | Robert Granetz |
Shot 22 -- Plasma, full length. 1.0 MA, 5.4 T, 1.4e20 m-2 (target), LSN, cryopump on. D,E,J at 3.0 MW,
EDA H-mode, followed by short ELMfree.
Next shot: program RXL to get to its flattop value 200 ms earlier (i.e. at t=0.6 s)
|
| Mar 3 2010 02:41:55:040PM | 1100303023 | Robert Granetz |
Shot 23 -- Plasma, full length. 1.0 MA, 5.4 T, 1.2e20 m-2 (target), LSN, cryopump on. D,E,J at 3.0 MW,
Long EDA H-mode. Target density was lower for some reason.
Next shot: no DPCS changes; decrease RF power
|
| Mar 3 2010 02:49:27:470PM | 1100303024 | Robert Granetz |
Shot 24 -- Plasma, full length. 1.0 MA, 5.4 T, 1.2e20 m-2 (target), LSN, cryopump on. D,E,J at 1.7 MW,
Several ELMfree H-modes.
Next shot: no DPCS changes; decrease Prf to 1.0 MW
|
| Mar 3 2010 03:05:20:473PM | 1100303025 | Robert Granetz |
Shot 25 -- Plasma, full length. 1.0 MA, 5.4 T, 1.2e20 m-2 (target), LSN, cryopump on. J (only) at 1.1 MW,
Even this eventually went into an EDA H-mode.
Next shot: no DPCS changes; decrease Prf to 0.5 MW
|
| Mar 3 2010 03:42:15:017PM | 1100303026 | Robert Granetz |
Shot 26 -- Plasma, full length. 1.0 MA, 5.4 T, 1.2e20 m-2 (target), LSN, cryopump on. J (only) at 0.6 MW,
H-mode, then L-mode, then H-mode.
Next shot: no DPCS changes; decrease Prf to 0.25 MW...still trying to get an L-mode point
|
| Mar 3 2010 03:42:49:640PM | 1100303027 | Robert Granetz |
Shot 27 -- Plasma, full length. 1.0 MA, 5.4 T, 1.2e20 m-2 (target), LSN, cryopump on. J (only) at 0.3 MW,
Finally stayed in L-mode.
Next shot: load in SSEP scan (ZCUR wires 2 and 3) from shot 1100224027 as per session leader's plan
|
| Mar 3 2010 04:01:32:020PM | 1100303028 | Robert Granetz |
Shot 28 -- Plasma, full length. 1.0 MA, 5.4 T, 1.2e20 m-2 (target), cryopump on. J (only) at 0.3 MW,
SSEP scan, LSN --> DN. Almost limited on upper plate late in flattop.
Next shot: Load ZXU programming from 1100224027 to avoid almost limiting on upper plate at end of flattop;
Increase amplitude of ZCUR and ZXU ramps to get to USN by end of ramp
|
| Mar 3 2010 04:13:24:110PM | 1100303029 | Robert Granetz |
Shot 29 -- Plasma, full length. 1.0 MA, 5.4 T, 1.2e20 m-2 (target), cryopump on. J (only) at 0.3 MW,
SSEP scan, LSN --> DN --> USN.
Next shot: move RXU in by about 2 cm for the latter half of the flattop; increase Prf
|
| Mar 3 2010 04:34:14:647PM | 1100303030 | Robert Granetz |
Shot 30 -- Plasma, nearly full length. 1.0 MA, 5.4 T, 1.2e20 m-2 (target), cryopump on. J (only) at 1.1 MW,
SSEP scan, LSN --> DN --> USN.
Next shot: no DPCS changes
|
| Mar 3 2010 04:50:04:193PM | 1100303031 | Robert Granetz |
Shot 31 -- Plasma, full length. 1.0 MA, 5.4 T, 1.1e20 m-2 (target), cryopump on. D,E,J at 2.0 MW,
SSEP scan, LSN --> DN --> USN.
Next shot: decrease nl_04 to 1.2e20 m-2
|
| Mar 3 2010 05:00:59:050PM | 1100303032 | Robert Granetz |
Shot 32 -- Plasma, disrupted at t=1.27 s, I think due to a radiated power problem. 1.0 MA, 5.4 T,
1.0e20 m-2 (target), cryopump on. E,J at 2.0 MW;
SSEP scan, LSN --> DN --> USN --> disruption
Next shot: increase nl_04 back to 1.4e20 m-2; increase Prf to 3 MW
|
| Mar 3 2010 05:10:20:123PM | 1100303033 | Robert Granetz |
Shot 33 -- Plasma, but disrupted at t=0.62 s. Looks like a big injection. 1.0 MA, 5.4 T.
End of run
|
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:59:25:143AM | Plasma | Ok | |
| 2 | 09:14:53:913AM | Plasma | Ok | |
| 3 | 09:32:34:683AM | Plasma | Bad | EF2 lower was turned off |
| 4 | 09:46:13:417AM | Plasma | Ok | |
| 5 | 10:00:59:920AM | Plasma | Ok | |
| 6 | 10:15:17:857AM | Plasma | Ok | |
| 7 | 10:28:28:840AM | Plasma | Ok | |
| 8 | 10:47:11:800AM | Plasma | Ok | |
| 9 | 11:01:08:427AM | Plasma | Ok | |
| 10 | 11:15:09:847AM | Plasma | Ok | |
| 11 | 11:28:32:003AM | Plasma | Ok | |
| 12 | 11:42:28:410AM | Plasma | Ok | |
| 13 | 11:57:02:177AM | Plasma | Ok | |
| 14 | 12:19:19:267PM | Plasma | Ok | |
| 15 | 12:33:17:187PM | Plasma | Ok | |
| 16 | 12:46:35:063PM | Plasma | Ok | |
| 17 | 12:59:52:407PM | Plasma | Ok | |
| 18 | 01:18:55:613PM | Plasma | Ok | |
| 19 | 01:32:15:020PM | Plasma | Ok | |
| 20 | 01:47:00:007PM | Plasma | Ok | |
| 21 | 02:00:18:680PM | Plasma | Ok | |
| 22 | 02:15:14:600PM | Plasma | Ok | |
| 23 | 02:30:58:650PM | Plasma | Ok | |
| 24 | 02:44:13:027PM | Plasma | Ok | |
| 25 | 02:59:15:590PM | Plasma | Ok | |
| 26 | 03:13:17:560PM | Plasma | Ok | |
| 27 | 03:26:16:543PM | Plasma | Ok | |
| 28 | 03:42:16:860PM | Plasma | Ok | |
| 29 | 04:02:11:270PM | Plasma | Ok | |
| 30 | 04:27:31:347PM | Plasma | Ok | |
| 31 | 04:40:47:120PM | Plasma | Ok | |
| 32 | 04:53:45:247PM | Plasma | Ok | |
| 33 | 05:06:31:917PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mar 3 2010 08:58:46:520AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Mar 4 2010 07:00:43:737AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| The alternator is experiencing an oil pressure problem the run may have a delayed start today. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Mar 4 2010 07:05:54:023AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| The alternator is experiencing an oil pressure problem the run start may be delayed this morning. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||