| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Brian Labombard |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Bill Cochran,Sam Pierson,Bill Byford |
| Engineering Operator Run Comment |
| MP#591 - Boundary layer heat transport experiments in H-mode plasmas |
| Session Leader Plans |
| Physics Operators Plans |
| Entered: Feb 11 2010 03:49:45:440PM |
| Author: Earl Marmar |
| -----------------
Engineering Setup for Friday, 12 February 2010 ----------------- MP#591 - Boundary layer heat transport experiments in H-mode plasmas Session leader: LaBombard Physics operator: Marmar Run begins at 09:00 and ends at 17:00 Power systems as on: 1091007024 Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled Gas setup: Fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 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) fill NINJA with 10 psi D2 ENABLED for GPI Enable gatevalves and shutters: ECE, VUV, HiREX Sr, Z-bolo Torvac gatevalve toggle (yes/no): no Boronization(yes/no): yes, overnight Overnight ECDC (yes/no): He 2 hours then D2 1 hour following boronization, see below ICRF(yes/no): yes, Prf = up to 4.5 MW, all antennas (78 to 80 MHz) LH(yes/no): no Cryopump (yes/no): YES, ready for the start of the run Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters: Boronization: dP:120 psi TC6:~80 mTorr rmin/rdwell/rmax: 44/103/52 cm tdwell/tsweep: 60/120 s EF4 current: 0 A Post boronization ECDC: 1st Gas Setup: Gas: He sweep: 44/45/103 cm scan: 20/120 s Pressure: 5.0e-5 Torr Duration: 2 Hours 2nd Gas Setup Gas: D2 sweep: 44/45/103 cm scan: 20/120 s Pressure: 2e-4 Torr Duration: 1 hour ----------------------------- Overall run plan: 1) Establish optimized plasma shape and strike point position for heat flux footprint measurements in 1 MA LSN EDA discharges. Reproduce (roughly) plasma shape of 1000626017, but with strike point raised to avoid damaged tungsten tiles. Get proficient with two types of discharges: (a) fixed strike point and (b) strike point sweeping up the divetor plate beyond probe#8. (2) Reproduce 'similarity discharge conditions' (steady EDA H-Mode, 1.0 MA, 5.4T, PICRF ~ 3 MW), matching dimensionless pedestal parameters with DIII-D. Use fixed and swept strike point programming. (3) Having established above, begin filling in the parameter matrix of MP#591 - scan Psol, density, plasma current... |
| Session Leader Summaries |
| Entered: Feb 14 2010 02:20:55:533PM |
| Author: Brian Labombard |
| Run Summary for 110212
MP#591 "Boundary layer heat transport experiments in H-mode plasmas" It was a productive day by many counts. This was our first attempt at systematically recording heat-flux footprint profiles with the new IR camera system. It was also a test of the suite of IR camera support software that has been put together (mostly under duress) to provide rudimentary analysis of IR data between shots. We weren't bashful about the shot selection either, targeting high-power ICRF heated discharges -- with pedestals matching DIII-D -- as the first data to collect. We started with a fresh boronization, recognizing that the divertor probes would likely be gummed up initially and that the boron coating would change the emissivity of the moly tile surfaces. Sure enough, probes were gummed, IR emission was over-bright. We proceeded to use the first few shots to establish a rough match of the C-Mod's outer boundary shape to recent DIII-D shots, while sweeping the divertor strike point to remove coatings on the target tiles. By shot 6 we had attained a reasonable match to DIII-D shape, ICRF had conditioned to the 3 MW level and the divertor probes had come back to life (although probe 8 showed some bizarre I-V profiles later in the day, suggesting that its life is near end). The IR camera stabilization programs worked well. Data from all shots but one were stabilized automatically during the analysis phase of the shot cycle. This allowed Jim Terry to assess the quality of the IR calibration parameters on several shots by comparing the tile temperatures and IR emission ~30 seconds after a discharge when the tile temperatures equilibrated. Surface emissivities where found to change shot-to-shot, changing most rapidly on the first shots. Tile temperature profiles were displayed using the new IR_SUBVIDEO program and they looked pretty believable. Surface temperatures of up to ~1100 C were seen and the profiles followed the strike point location (although there appeared to be some thick coatings further down into the divertor 'slot' that lit up there). No between-shot analysis (or any analysis for that matter) of surface heat fluxes was yet available, so we had to imagine what the heat flux profile would be. Perhaps we will get some software for this up and running by the next outing. It's on the do-list, among other things. By shot 7 we were ready to try to 'match' the DIII-D pedestals, in particular, recent profile data sent to us by Rajesh Maingi and Charlie Lasnier, who performed companion heat-flux footprint experiments on DIII-D earlier on Tuesday and Wednesday (MP 2010-62-02). We had the right field, current, density, similar shaping, almost the right q_95...but we also had bad news -- the H-modes were just not behaving. We kept getting ELM-free like periods with impurity accumulation punctuated by a radiative collapse H-L transition. We had no choice but to drop the current slightly (0.9 MA instead of 1.0 MA), which raised q_95 to ~4 and allowed us to access some nice stationary EDAs. Once we got stationary EDAs, (0.9 MA, 5.4 tesla, NL04 ~ 1.2e20 target L-mode), we milked them as best we could, scanning RF power (1 MW to 4 MW) and switching from fixed to swept strike point programming. The result of this are shots 9 through 28. At first we thought that we could vary the density up or down a bit, but we were caught between the minimum density needed for EDA (NL04~ 1.1e20) and having too much neutral pressure at the outer midplane causing ICRF trips. Anyway, in the course of the power scans (and the intrinsic variations in Prad), we got some pedestal Ne and Te profiles that essentially overlayed with the recent DIII-D results (with Te slightly reduced from the old similarity shots of 1000626017). We also got pedestals that overlayed almost identically with those from 1000626017 (Shot#24 today, with 4 MW ICRF). Having pretty much exhausted the 0.9 MA target and pedestal match attempt, we then turned our attention back to filling in the parameter matrix of MP591. First stop was 0.8 MA. Shots 30-32 were our attempts, but we didn't get far. Some things learned: (1) The IR camera can be operated with 1 integration time and still get reasonable signals at low temperatures for cross-calibrations with tiles, late after the shot. Shot-to-shot cross calibration is essential. Some coding work for this is needed, perhaps involving all the virtual pixels that view a given tile. (2) Despite the good dimensionless match of the pedestal Ne and Te, it is pretty clear that the profiles further out into the SOL **do not match**. C-Mod appears to have a factor of ~5 more density out there than DIII-D does, according to edge Thomson. These Thomson measurements should be verified with probes in the far SOL -- something we should put on the do-list for C-Mod. Anyway, I take this (tentative) result as clear evidence that atomic physics does indeed affect the SOL profiles. Stated another way, dimensionlessly similar pedestals (in the fully-ionized plasma-physics sense) do not yield dimensionlessly similar SOLs. Neutral opacity plays a significant role. In this light, it will certainly be telling if the heat flux footprint widths scale with machine size from C-Mod to DIII-D in these pedestal identity experiments (as we think they do). It would mean that the pedestal (and the associated plasma transport physics) sets the heat flux width near the LCFS; atomic physics play a minor role at best. Quick shot log: 1-no power shot 2-LSN, 5.47 tesla, Ip=1.0, NL04~1.2 lgap: 1.5, rgap: 1.5 kapppa: 1.63 No IR camera data 2 MW from J - conditioning up probes are boron coated. 3-LSN, 5.4 tesla, Ip=1.0, NL04~1.0 target lgap: 1.5, rgap: 1.4 kapppa: 1.62 LHLH with injections. got IR camera data, video is locking, clear evidence of coatings. ICRF ramp to 3MW - conditioning probes are still boron coated; gains need adjusting. Injections from J-port antenna 4-LSN, 5.4 tesla, Ip=1.0, NL04~0.9 target LHLH with injections. got IR camera data, video is locked probes are still boron coated 5-LSN, 5.4 tesla, Ip=1.0, NL04~1.1 target longer H-mode with density ramp kappa is 1.63 early delta upper needs to be increased. Is 0.25. need 0.32. got IR camera data, video is locked ICRF ramp starting at 0.7s to 3.8MW probes are cleaning up. 6-LSN, 5.4 tesla, Ip=1.0, NL04~1.1 target HLHLs from impurity injections - J antenna suspected. Reasonable match to D3D shape. SSEP is -1 cm, which is marginal. got IR camera data, video is locked ICRF at 0.7s, 3.2MW probes are clean enough to fly now. No cryopump on next shot. 7-LSN, 5.4 tesla, Ip=1.0, NL04~1.1 target HLHLs again. Reasonable match to D3D shape got IR camera data, one integration time, video is locked ICRF at 0.7s, 3.2MW 8-LSN, 5.4 tesla, Ip=1.0, NL04~1.2 target still HLHLs. Second H-mode is EDAish got IR camera data, one integration time, video is locked ICRF at 0.7s, 3.2MW Next: go to 0.9 MA9-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target steady EDA with NL04~21 got IR camera data, one integration time, video is locked ICRF at 0.7s, 1.3MW J-only 10-LSN, 5.4 tesla, Ip=0.9 MA Early disruption. 11-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on density-ramp EDA with NL04~2.0 to 2.3 Prad_foil ramps to 2.5 MW got IR camera data, one integration time, video is locked ICRF at 0.7s, 3 MW 12-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on strike point fixed on tile#4 steady EDA with NL04~2.0 Prad_foil is 1.7 MW got IR camera data, one integration time, video is locked ICRF at 0.7s, 3.2 MW 13-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on steady EDA with NL04~2.1 Prad_foil is 1.5 MW strike point fixed on tile#4 got IR camera data, one integration time, video is locked ICRF at 0.8s, 3.2 MW 14-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on steady EDA with NL04~2.0 Prad_foil settles to ~1.0 MW strike point fixed on tile#4 got IR camera data, one integration time, video is locked ICRF at 0.8s, steps up to 2.2 MW 15-LSN, 5.4 tesla, Ip=0.9, NL04~1.25 target at RF turn-on steady EDA with NL04~1.9 Prad_foil settles to ~0.8 MW strike point fixed on tile#4 got IR camera data, one integration time, video is locked ICRF at 0.8s, 1.1 MW 16-LSN, 5.4 tesla, Ip=0.9, NL04~1.25 target at RF turn-on EDA density ramp NL04~2 to 2.2 Prad_foil ramps to ~1.0 MW strike point sweep got IR camera data, one integration time, video is locked ICRF at 0.8s, 1.2 MW 17-LSN, 5.4 tesla, Ip=0.9, NL04~1.25 target at RF turn-on EDA density ramp NL04~1.8 to 2.0 Prad_foil ramps to ~1.3 MW strike point sweep got IR camera data, one integration time, video is locked ICRF at 0.8s, 2 MW E-port tripping Next: repeat 18-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on EDA density ramp NL04~1.9 to 2.0 Prad_foil ramps to ~1.4 MW strike point sweep got IR camera data, one integration time, video is locked ICRF at 0.8s, 2.1 MW E-port tripping 19 - fizzle 20 - early disruption 21-LSN, 5.4 tesla, Ip=0.9, NL04~1.1 target at RF turn-on LHLH is back strike point sweep got IR camera data, one integration time, video is locked ICRF at 0.7s, 3 MW with trips Looks like we didn't have enough positive bias on the divertor probes. Changed to +60 volts on the AETechron programming. 22-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on density-ramp EDA, NL04 ~ 2.0 to 2.2 strike point sweep Prad_foil ends at 2 MW got IR camera data, one integration time, video is locked ICRF at 0.7s, 3 MW clean Next: reload shot#13 23-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on steady EDA with NL04~2.0 to 2.2 Prad_foil settles to ~1.5 MW strike point fixed on tile#4 got IR camera data, one integration time, video is locked ICRF at 0.8s, 3.1 MW Next: 4MW 24-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on steady EDA with NL04~2.0 to 2.2 Prad_foil settles to ~2.0 MW strike point fixed on tile#4 got IR camera data, one integration time, video is NOT locked ICRF at 0.8s, 4.0 MW Camera shift exceeds 60 pixels on this shot. Will need to rerun stabilzation program. Next: repeat 25-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on J trips early and spews. disrupts at 1.03s 26-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on steady EDA after initial hiccup with NL04~2.0 Prad_foil settles to ~2.5 MW strike point fixed on tile#4 got IR camera data, one integration time, video is locked ICRF at 0.7s (D+E) and 8s (J), 4.0 MW 27-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on steady EDA after J trips out, NL04 ~ 2.0 Prad_foil settles to ~1.2 MW (prad main ~ 1.6) strike point fixed on tile#4 got IR camera data, one integration time, video is locked ICRF after 1.04s (D+E):2.0 MW 28-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on density-ramp EDA, NL04 ~ 2.0 to 2.3 Prad_foil to ~2.8 MW strike point sweep got IR camera data, one integration time, video is locked ICRF AT 0.7s, 4 MW 29-no power shot 30-LSN, 5.4 tesla, Ip=0.8, NL04~1.0 target at RF turn-on radiation terminated H-modes Disruption at 1.08s got IR camera data, one integration time, video is locked ICRF tries for 4MW 31-LSN, 5.4 tesla, Ip=0.8 Disrupts at 0.58s 32-LSN, 5.4 tesla, Ip=0.8, NL04~1.0 target at RF turn-on Short EDA followed by two ELM-free got IR camera data, one integration time, video is locked ICRF (D+E) ~ 1.7 MW |
| Physics Operator Summaries |
| Session Leader Comments | |||
| Feb 11 2010 04:16:56:080PM | Brian Labombard | MP#591 - Boundary layer heat transport experiments in H-mode plasmas Primary targets for today are: (1) Establish optimized plasma shape and strike point position for heat flux footprint measurements in 1 MA LSN EDA discharges. Reproduce (roughly) plasma shape of 1000626017, but with strike point raised to avoid damaged tungsten tiles. Get proficient with two types of discharges: (a) fixed strike point and (b) strike point sweeping up the divetor plate beyond probe#8. (2) Reproduce 'similarity discharge conditions' (steady EDA H-Mode, 1.0 MA, 5.4T, PICRF ~ 3 MW), matching dimensionless pedestal parameters with DIII-D. Use fixed and swept strike point programming. (3) Having established above, begin filling in the parameter matrix of MP#591 - scan Psol, density, plasma current... Setup: Overnight boronization with ECDC cleanup, using parameters identical to Monday night (02/08/10). All shots today will be 5.4 tesla. 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 to assist boronization recovery. Shot Plan: Reload from shot#1091007024. This was a 0.8 MA, 5.4 tesla shot with a sweep programmed into RXL. Increase plasma current to 1.0 MA Increase left gap to 1.6 cm Keep right gap at 1.3 cm Increase kappa to 1.66 Increase upper triangularity to 0.33 Set L-mode target density to NL04 ~ 1.1e20 Set ICRF from 0.5 to 1.5 seconds. Condition RF as needed to 3.0 MW flattop. A. 1.0 MA, pedestal match, 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, and vary density + RF power to match scaled DIII-D pedestal parameters. ~10 shots 2. Program fixed strike point. Optimize IR and pedestal parameters for match. ~2 shots B. 1.0 MA, RF Power and density Scans 1. NL04~1.1e20, ICRF Power: 2.0, 1.0, then 4.5 MW Alternate between fixed and swept strike point shots. ~8 shots 2. Raise density, respecting neutral pressure limits for ICRF. NL04~1.7e20 is desired, ICRF Power: 2.0, 3.0, 4.5 MW Alternate between fixed and swept strike point shots. ~6 shots C. 0.8 MA, RF Power and density Scans Change to 0.8 MA. Adjust strike sweep programming as needed. 1. NL04~0.9e20, ICRF Power: 3.0, 2.0, 1.0, then 4.5 MW Alternate between fixed and swept strike point shots. ~8 shots ... | |
| Feb 12 2010 09:52:34:427AM | 1100212002 | Brian Labombard | 2-LSN, 5.47 tesla, Ip=1.0, NL04~1.2 target lgap: 1.5, rgap: 1.5 kapppa: 1.63 No IR camera data 2 MW from J - conditioning up probes are boron coated Need to increase elongation and match shape near plasma top. |
| Feb 12 2010 10:11:23:917AM | 1100212003 | Brian Labombard | 3-LSN, 5.4 tesla, Ip=1.0, NL04~1.0 target lgap: 1.5, rgap: 1.4 kapppa: 1.62 LHLH with injections. got IR camera data, video is locking, clear evidence of coatings. ICRF ramp to 3MW - conditioning probes are still boron coated; gains need adjusting. Injections from J-port antenna |
| Feb 12 2010 10:39:23:777AM | 1100212004 | Brian Labombard | 4-LSN, 5.4 tesla, Ip=1.0, NL04~0.9 target LHLH with injections. got IR camera data, video is locked probes are still boron coated |
| Feb 12 2010 10:40:08:230AM | 1100212005 | Brian Labombard | 5-LSN, 5.4 tesla, Ip=1.0, NL04~1.1 target longer H-mode with density ramp kappa is 1.63 early delta upper needs to be increased. Is 0.25. need 0.32. got IR camera data, video is locked ICRF ramp starting at 0.7s to 3.8MW probes are cleaning up |
| Feb 12 2010 10:59:28:347AM | 1100212006 | Brian Labombard | 6-LSN, 5.4 tesla, Ip=1.0, NL04~1.1 target HLHLs from impurity injections - J antenna suspected. Reasonable match to D3D shape. SSEP is -1 cm, which is marginal. got IR camera data, video is locked ICRF at 0.7s, 3.2MW probes are clean enough to fly now. No cryopump on next shot. |
| Feb 12 2010 11:24:10:237AM | 1100212007 | Brian Labombard | 7-LSN, 5.4 tesla, Ip=1.0, NL04~1.1 target HLHLs again. Reasonable match to D3D shape got IR camera data, one integration time, video is locked ICRF at 0.7s, 3.2MW |
| Feb 12 2010 11:23:27:377AM | 1100212008 | Brian Labombard | 8-LSN, 5.4 tesla, Ip=1.0, NL04~1.2 target still HLHLs. Second H-mode is EDAish got IR camera data, one integration time, video is locked ICRF at 0.7s, 3.2MW Next: go to 0.9 MA |
| Feb 12 2010 11:39:59:083AM | 1100212009 | Brian Labombard | 9-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target steady EDA with NL04~2.1 got IR camera data, one integration time, video is locked ICRF at 0.7s, 1.3MW J-only |
| Feb 12 2010 11:51:57:563AM | 1100212010 | Brian Labombard | 10-LSN, 5.4 tesla, Ip=0.9 MA Early disruption. |
| Feb 12 2010 12:14:23:277PM | 1100212011 | Brian Labombard | 11-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on density-ramp EDA with NL04~2.0 to 2.3 got IR camera data, one integration time, video is locked ICRF at 0.7s, 3 MW |
| Feb 12 2010 12:52:31:567PM | 1100212012 | Brian Labombard | 12-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on strike point fixed on tile#4 steady EDA with NL04~2.0 Prad_foil is 1.7 MW got IR camera data, one integration time, video is locked ICRF at 0.7s, 3.2 MW |
| Feb 12 2010 12:52:49:270PM | 1100212013 | Brian Labombard | 13-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on steady EDA with NL04~2.1 Prad_foil is 1.5 MW strike point fixed on tile#4 got IR camera data, one integration time, video is locked ICRF at 0.8s, 3.2 MW |
| Feb 12 2010 12:53:20:880PM | 1100212014 | Brian Labombard | 14-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on steady EDA with NL04~2.0 Prad_foil settles to ~1.0 MW strike point fixed on tile#4 got IR camera data, one integration time, video is locked ICRF at 0.8s, steps up to 2.2 MW |
| Feb 12 2010 01:38:47:857PM | 1100212015 | Brian Labombard | 15-LSN, 5.4 tesla, Ip=0.9, NL04~1.25 target at RF turn-on steady EDA with NL04~1.9 Prad_foil settles to ~0.8 MW strike point fixed on tile#4 got IR camera data, one integration time, video is locked ICRF at 0.8s, 1.1 MW |
| Feb 12 2010 01:39:09:670PM | 1100212016 | Brian Labombard | 16-LSN, 5.4 tesla, Ip=0.9, NL04~1.25 target at RF turn-on EDA density ramp NL04~2 to 2.2 Prad_foil ramps to ~1.0 MW strike point sweep got IR camera data, one integration time, video is locked ICRF at 0.8s, 1.2 MW |
| Feb 12 2010 01:51:36:510PM | 1100212017 | Brian Labombard | 17-LSN, 5.4 tesla, Ip=0.9, NL04~1.25 target at RF turn-on EDA density ramp NL04~1.8 to 2.0 Prad_foil ramps to ~1.3 MW strike point sweep got IR camera data, one integration time, video is locked ICRF at 0.8s, 2 MW E-port tripping Next: repeat |
| Feb 12 2010 02:50:54:140PM | 1100212022 | Brian Labombard | 22-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on density-ramp EDA, NL04 ~ 2.0 to 2.2 strike point sweep Prad_foil ends at 2 MW got IR camera data, one integration time, video is locked ICRF at 0.7s, 3 MW clean Next: reload shot#13 |
| Feb 12 2010 03:08:07:520PM | 1100212023 | Brian Labombard | 23-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on steady EDA with NL04~2.0 Prad_foil settles to ~1.5 MW strike point fixed on tile#4 got IR camera data, one integration time, video is locked ICRF at 0.8s, 3.1 MW |
| Feb 12 2010 03:23:48:320PM | 1100212024 | Brian Labombard | 24-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on steady EDA with NL04~2.0 to 2.2 Prad_foil settles to ~2.0 MW strike point fixed on tile#4 got IR camera data, one integration time, video is NOT locked ICRF at 0.8s, 4.0 MW Camera shift exceeds 60 pixels on this shot. Will need to rerun stabilzation program. Next: repeat |
| Feb 12 2010 03:36:24:727PM | 1100212025 | Brian Labombard | 25-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on J trips early and spews. disrupts at 1.03s |
| Feb 12 2010 03:50:31:117PM | 1100212026 | Brian Labombard | 26-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on steady EDA after initial hiccup with NL04~2.0 Prad_foil settles to ~2.5 MW strike point fixed on tile#4 got IR camera data, one integration time, video is locked ICRF at 0.7s (D+E) and 0.8s (J), 4.0 MW |
| Feb 12 2010 04:11:31:640PM | 1100212027 | Brian Labombard | 27-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on steady EDA after J trips out, NL04 ~ 2.0 Prad_foil settles to ~1.2 MW (prad main ~ 1.6) strike point fixed on tile#4 got IR camera data, one integration time, video is locked ICRF after 1.04s (D+E):2.0 MW |
| Feb 12 2010 04:57:39:053PM | 1100212028 | Brian Labombard | 28-LSN, 5.4 tesla, Ip=0.9, NL04~1.2 target at RF turn-on density-ramp EDA, NL04 ~ 2.0 to 2.3 Prad_foil to ~2.8 MW strike point sweep got IR camera data, one integration time, video is locked ICRF AT 0.7s, 4 MW |
| Feb 12 2010 04:58:07:800PM | 1100212030 | Brian Labombard | 30-LSN, 5.4 tesla, Ip=0.8, NL04~1.0 target at RF turn-on radiation terminated H-modes Disruption at 1.08s got IR camera data, one integration time, video is locked ICRF tries for 4MW |
| Feb 12 2010 05:35:51:497PM | 1100212032 | Brian Labombard | 32-LSN, 5.4 tesla, Ip=0.8, NL04~1.0 target at RF turn-on Short EDA followed by two ELM-free got IR camera data, one integration time, video is locked ICRF (D+E) ~ 1.7 MW |
| Physics Operator Comments | |||
| Feb 12 2010 09:06:35:060AM | 1100212001 | Earl Marmar | load segment 1 from 1100209005 (post boronization, with cryopump, startup)
load segment 2 from 1091007024 increase Ip to 1.0 MA increase clearin by 0.006 m increase rcur by 0.003 m decrease RXU by ~0.007 m nl_04 target to 1.1e20 OH1 fault, no power shot |
| Feb 12 2010 09:48:42:250AM | 1100212002 | Earl Marmar | no dpcs changes
plasma, disrupts in rampdown hit current limits on EF1_U and OH2_L TF current is slightly higher than programmed (~2 kA) |
| Feb 12 2010 10:02:34:783AM | 1100212003 | Earl Marmar | reduce TF demand to 148 kA in segment 2
tweaks to ZXU and RXU (both decreased) to aim for better shape match to the DIII-D target shot plasma, disrupt at 1.43 s, preceded by big increase in Prad Wide 2 shows a lot of action at the bottom of J-port, second strap from the left |
| Feb 12 2010 10:18:35:567AM | 1100212004 | Earl Marmar | no dpcs changes
plasma, full length multiple ELM-freeish H-modes density is a little low before the RF comes on |
| Feb 12 2010 10:39:11:840AM | 1100212005 | Earl Marmar | tweaks to nl_04 gains (proportional down, integral up)
decrease ZXU 0.007 m plasma, disrupt at 1.52 s early hards, Ip hesitation during startup 1 decent H-mode, EDA-ish |
| Feb 12 2010 10:45:40:880AM | 1100212006 | Earl Marmar | decrease ZXU and RXU
increase plc limit for OH2_L to 29 kA (from 26 kA) on the "forward" swing plasma, disrupt at 1.48 s bounce and hards on startup multiple ELM-free H-modes J antenna lighting up |
| Feb 12 2010 11:21:16:140AM | 1100212007 | Earl Marmar | cryopump off
prefill puff to 24 ms (from 55 ms) increase nl_04 prop gain, lower deriv gain plasma, full length early hards 5 ELM-free H-modes |
| Feb 12 2010 11:20:41:840AM | 1100212008 | Earl Marmar | prefill puff to 27 ms (from 24 ms)
BR_0 offset to 0.000 from +0.005 nl_04 target to 1.2e20 plasma, full length multiple H-modes, second one has hints of QC no hards |
| Feb 12 2010 11:32:34:153AM | 1100212009 | Earl Marmar | Ip to 0.9 MA
plasma, full length steady EDA, J-port only |
| Feb 12 2010 11:45:31:993AM | 1100212010 | Earl Marmar | no dpcs changes
plasma, early disrupt (0.5 s), preceded by large increase in Prad |
| Feb 12 2010 11:57:37:557AM | 1100212011 | Earl Marmar | no dpcs changes
plasma, full length startup bounce, hards EDA, but density rises through the H-mode |
| Feb 12 2010 12:24:53:273PM | 1100212012 | Earl Marmar | prefill puff to 30 ms (from 27 ms)
RXL and ZXL programmed to hold flat from 0.85 to 1.5 s (stop sweeping the strike) plasma, full length nice steady EDA |
| Feb 12 2010 12:51:32:487PM | 1100212013 | Earl Marmar | no dpcs changes
plasma, full length steady EDA |
| Feb 12 2010 12:53:53:333PM | 1100212014 | Earl Marmar | no dpcs changes
plasma, full length another steady EDA, lower RF power, more or less as requested |
| Feb 12 2010 01:07:33:070PM | 1100212015 | Earl Marmar | no dpcs changes
plasma, full length steady EDA, 1 MW RF as requested |
| Feb 12 2010 01:39:34:030PM | 1100212016 | Earl Marmar | import segment 2 from 1100212011 into segment 2
keep the strike point sweeping through Ip flattop plasma, full length steady EDA, density rising slightly |
| Feb 12 2010 01:40:13:670PM | 1100212017 | Earl Marmar | no dpcs changes
plasma, full length steady EDA, but some RF trips |
| Feb 12 2010 01:51:31:603PM | 1100212018 | Earl Marmar | no dpcs changes
plasma, full length steady EDA, with some RF trips, but better |
| Feb 12 2010 02:05:43:667PM | 1100212019 | Earl Marmar | nl_04 target to 1.1e20
fizzle currents in the coils look fine, fields look ok |
| Feb 12 2010 02:15:10:617PM | 1100212020 | Earl Marmar | reduce prefill puff to 28 ms (from 30 ms)
plasma, early disrupt (0.49 s) looks very much like shot 10 |
| Feb 12 2010 02:29:02:540PM | 1100212021 | Earl Marmar | no dpcs changes
plasma, full length multiple ELM-free looking H-modes early hards are back |
| Feb 12 2010 02:49:39:000PM | 1100212022 | Earl Marmar | increase prefill to 30 ms (from 28 ms)
nl_04 target to 1.2e20, and try to get there sooner plasma, full length EDA-ish, with some Mo problems in the middle of the H-mode |
| Feb 12 2010 03:23:14:413PM | 1100212023 | Earl Marmar | import segment 2 from 1100212013 into segment (fixed strike after 0.85 s)
plasma, full length steady EDA, 3MW RF |
| Feb 12 2010 03:24:40:260PM | 1100212024 | Earl Marmar | no dpcs changes
plasma, full length steady EDA (4 MW RF) after some early impurity radiation 120 W fusion power at the tops of the sawteeth (neutron rate 9e13/s) |
| Feb 12 2010 03:35:42:723PM | 1100212025 | Earl Marmar | no dpcs changes
plasma, disrupt at 1.04 s, during RF Prad is very high just prior to the disruption |
| Feb 12 2010 03:50:32:193PM | 1100212026 | Earl Marmar | no dpcs changes
plasma, full length nice EDA, lower stored energy/higher Prad than on shot 24 early hards |
| Feb 12 2010 04:01:52:003PM | 1100212027 | Earl Marmar | no dpcs changes
plasma, full length EDA, mostly at 2 MW RF (J tripping, and then off after 1.1 s) |
| Feb 12 2010 04:22:53:763PM | 1100212028 | Earl Marmar | import segment 2 from 1100212022 into segment 2 (continue x-pt sweep up over the nose)
plasma, disrupt at 1.50 s decent EDA, RF power 4 MW |
| Feb 12 2010 04:29:30:553PM | 1100212029 | Earl Marmar | Ip to 0.8 MA
nl_04 target to 1e20 data problems during init no power shot |
| Feb 12 2010 04:46:31:447PM | 1100212030 | Earl Marmar | Ip to 0.8 MA
nl_04 target to 1e20 second try plasma, disrupt at 1.1 s, lots of radiated power early hards |
| Feb 12 2010 05:03:15:413PM | 1100212031 | Earl Marmar | no dpcs changes
plasma, early disrupt (0.55 s) reminiscent of shots 10 and 20 hards on startup |
| Feb 12 2010 05:11:01:017PM | 1100212032 | Earl Marmar | prefill puff to 32 ms (from 30 ms)
plasma, full length H-mode, but not pretty just a few hards on startup |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:02:53:150AM | Plasma | Bad | OH1 type 3 flt |
| 2 | 09:29:49:103AM | Plasma | Ok | |
| 3 | 09:48:54:127AM | Plasma | Ok | |
| 4 | 10:07:38:633AM | Plasma | Ok | |
| 5 | 10:21:39:257AM | Plasma | Ok | |
| 6 | 10:38:15:370AM | Plasma | Ok | |
| 7 | 10:56:58:220AM | Plasma | Ok | |
| 8 | 11:10:58:093AM | Plasma | Ok | |
| 9 | 11:24:24:237AM | Plasma | Ok | |
| 10 | 11:38:23:563AM | Plasma | Ok | |
| 11 | 11:52:19:783AM | Plasma | Ok | |
| 12 | 12:09:15:553PM | Plasma | Ok | |
| 13 | 12:25:57:527PM | Plasma | Ok | |
| 14 | 12:44:49:407PM | Plasma | Ok | |
| 15 | 01:03:08:313PM | Plasma | Ok | |
| 16 | 01:16:08:847PM | Plasma | Ok | |
| 17 | 01:30:01:533PM | Plasma | Ok | |
| 18 | 01:43:57:987PM | Plasma | Ok | |
| 19 | 01:57:11:550PM | Plasma | Ok | |
| 20 | 02:10:10:767PM | Plasma | Bad | OI2 conm fault, OH1 self powered circuit fired. |
| 21 | 02:23:12:627PM | Plasma | Ok | |
| 22 | 02:36:23:623PM | Plasma | Ok | |
| 23 | 02:49:45:060PM | Plasma | Ok | |
| 24 | 03:04:35:953PM | Plasma | Ok | |
| 25 | 03:22:26:460PM | Plasma | Ok | |
| 26 | 03:35:39:803PM | Plasma | Ok | |
| 27 | 03:49:35:083PM | Plasma | Ok | |
| 28 | 04:05:27:790PM | Plasma | Ok | |
| 30 | 04:37:23:090PM | Plasma | Ok | |
| 31 | 04:51:54:810PM | Plasma | Ok | |
| 32 | 05:05:00:210PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Feb 12 2010 09:02:17:697AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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