| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Mike Churchill,Jerry Hughes |
| Physics operator(s): | Bill Rowan |
| Engineering operator(s): | Andy Pfeiffer,Bill Byford |
| Engineering Operator Run Comment |
| MP 648 (0.6) - Direct boron density asymmetry measurements SL: Churchill |
| Session Leader Plans |
| Entered: Aug 9 2012 04:43:22:587PM |
| Author: Mike Churchill |
| This run finishes the planned run of 1120803, adding in the N2 injection part of MP718.
This run will combine parts from MP648: Direct Boron Density Asymmetry Measurements and MP 718: The effect of poloidally-localized sources on in-out density asymmetries. For MP648, the goal is to vary collisionality and gradient scale lengths to vary the density asymmetry. Today, this will focus ELM-free H-modes, as was 1120621, but with improved gap scans and different photodiodes at the HFS, to improve the HFS density profiles. 1120803 finished off the EDA H-mode, and inadvertently got Part 4.2, 1.0MA ELM-free, so we will do Part 4.1 and 4.3. For MP718, the goal is to change plasma conditions so as to determine how a poloidally-localized impurity source affects the in-out density asymmetry. NOTE: For better Thomson coverage, and to avoid changing Thomson fiber positions between my MP's and Jerry's afternoon MP, we will run a higher elongation than the previous run kappa~1.7 instead of 1.6). Required Diagnostics and Setup edge CXRS Both NINJA plenums will be filled with D2. Chromex will be setup to view A-side, to monitor B and D recycling from the inner-wall edge Thomson Auxilary Systems Ne seeding will be used Part 0: Boronization recovery (4 shots, attempt Part 2 during this) Part 2: SSEP sweeps (6 shots) EDA H-mode, Ip=0.8 MA, nl04=0.7, RF=3MW (reference shot 1080125013) MP718 Based on 1120803, my guess is we'll have to raise the density a little to get a steady EDA Magnetic topology: 1. Start in LSN (SSEP = -1 [cm]) 2. Sweep from LSN to DN from 0.85 to 1.0s 3. Stay in DN from 1.0s to 1.2s (SSEP = 0 [cm]) 4. Sweep from DN to USN from 1.2 to 1.35s 5. Stay in USN till the end of the shot (SSEP = 0.3 [cm]) Modify sweep or NINJA puffs as needed. Part 3: L-gap scan (4 shots) EDA H-mode, use a good shot from Part 1 MP718 Sweep the L-gap from 14mm to 2mm from 0.8 to 1.5s. Adjust NINJA puffs as needed. May also try shots with fixed L-gap of 2mm, then 14mm, if first part successful. Part 4: Ip and RF scan in ELM-free H-mode (3 shots + 2 shots buffer) MP648 Use reference shot from Part 1, same gap changes. 1. Ip=0.8MA, nl04=0.6, RF=2MW 2. Ip=1.0MA, nl04=0.8, RF=2.5MW 3. Ip=1.2MA, nl04=1.0, RF=3MW OPTIONAL PARTS: To be run if extra time, before the N2 part to avoid N2 contamination of the BV line Part Optional1: Repeat EDA H-modes at 0.6MA and 0.8MA with today's higher elongation Part Optional2: USN EDA H-modes (optional) MP648 If time remains, attempt USN EDA H-modes, matching parameters from the best shots of Part 1 Switch over CXRS views into the Chromex for views N2. Close off one NINJA plenum, put N2 into the other NINJA plenum. Ronnie says bottles N2 and Ne bottles should already be hooked up. Part 5: N2 Injections into Ohmic L-mode plasmas (4 shots) Ohmic, Ip=0.8 MA, 0.8 nl04, no RF (reference shot 1120627014) 2 shots: N2 fired from LFS. Adjust N2 plenum pressure as needed. 2 shots: N2 fired from HFS. Adjust N2 plenum pressure as needed. |
| Entered: Aug 9 2012 09:10:04:717PM |
| Author: Jerry Hughes |
| SL plan for approx. 2pm--6pm
MP715, 2nd half-day. Require: ECE, D-alpha, and bolometry all in working order. Disable NINJA. Enable Ar from H-bottom. Use a 70ms puff at 0.3s. Keep this constant throughout the run. Based on experience of Tuesday's run, it is evident that we must raise the power threshold from ~1.5MW (where Ohmic power dominates) to something in the ballpark of 2--3MW. Therefore we will increase the target nl04 from 0.9e20 to 1.3e20. According to [Y. Ma, NF2012], this will place Pth at about 2.5MW, and now ~1.5MW will be required from ICRF. (1) Control discharge (no ramp): Load from 1120807021. Remove RCUR ramp; set RCUR to be constant 0.659m over entire flattop. Set nl04 to 1.3e20. **Shot (1a): Find approximate threshold. Over 0.5s to 1.5s, ramp Prf from 1.0MW to 2.0MW. Note power at transition. **Shot (1b): Choose Prf 200kW lower than the power determined from shot (1a). Apply constant ICRF at that level from 0.5 to 1.5s. **Shots (1c): Increment/decrement power as needed in order to determine threshold power. (2) Introduce current ramps. Change the current demand so that: 0.5--0.7s: flat 0.8MA 0.7--0.8s: ramp from 0.8 to 1.1MA 0.8--1.0s: flat 1.1MA 1.0--1.1s: ramp from 1.1 to 0.8MA 1.1--1.3s: flat 0.8MA 1.3--1.5s: ramp from 0.8 to 1.1MA 1.5-- : ramp down as usual For the following shots, RF will be switched between 6 levels of power: P1 (low Ip), P2 (ramp-up), P3 (high Ip), P4 (ramp-down), and P5 (slow ramp-up). 0.5--0.7s: P1 0.7--0.8s: P2 0.8--1.0s: P3 1.0--1.1s: P4 1.1--1.3s: P1 1.3--1.5s: P5 Take the RF power required for H-mode access in (1). Call this P0. **Shot (2a): Set P1=P2=P3=P4=P5= (P0 - 200kW) Run the shot. Look for L-H transitions. **Shots (2b): Adjust the Px values shot-to-shot in order to resolve the power threshold in each phase. If H-mode is obtained in a given stage x, then reduce Px on the subsequent shot. If no H-mode is observed in a given ramping phase, then increase power in that phase on the subsequent shot. Try to avoid H-modes in the mini-flattops. (3) Change the order of current ramps to rule out time-sensitive behavior: Change the current demand so that: 0.5--0.7s: flat 1.1MA 0.7--0.8s: ramp from 1.1 to 0.8MA 0.8--1.0s: flat 0.8MA 1.0--1.1s: ramp from 0.8 to 1.1MA 1.1--1.3s: flat 1.1MA 1.3--1.5s: ramp from 1.1 to 0.8MA 1.5-- : ramp down as usual Now there will be a new ordering for the RF power demands: 0.5--0.7s: P3 0.7--0.8s: P4 0.8--1.0s: P1 1.0--1.1s: P2 1.1--1.3s: P3 1.3--1.5s: P6 Where P6 is the power in the slow ramp-down phase and replaces the P5 setting. **Shot (3a): Leave P1--P4 at below threshold power as determined in Step (2). Set P6= (P0 - 200kW) Run the shot. Look for L-H transitions. **Shots (3b): Adjust the Px values shot-to-shot in order to resolve the power threshold in each phase. If H-mode is obtained in a given stage x, then reduce Px on the subsequent shot. If no H-mode is observed in a given ramping phase, then increase power in that phase on the subsequent shot. Try to avoid H-modes in the mini-flattops. |
| Physics Operators Plans |
| Entered: Aug 9 2012 01:56:52:550PM |
| Author: Bill Rowan |
| PhysOp Plan for Run 1120810
MP 648 (0.6) - Direct boron density asymmetry measurements 9am to 2pm; 5 hours SL: Churchill MP715 (0.5) - Do current ramps modify H-mode access? 2pm to 6pm: 4 hours SL: Hughes PO: Rowan ----------------- Engineering Setup ----------------- Overnight boronization Thursday night, follow most recent prescription Post boronization ECDC 1st Gas Setup: Gas: He sweep: 44/103/45 cm scan: 20/120s Pressure: 5.e-5 Torr Duration: 2 Hours ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1120803015 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 3 psi Neon Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main with 40 psi D2 Hybrid enabled (PG3) fill H-bottom with 1psi Argon Hybrid ENABLED (PG5) fill NINJA with 10 psi D2 ENABLED Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus/LoWEUS Leave z-bolo shutter as is (should be open) Torvac gatevalve toggle (yes/no): no Boronization(yes/no): yes Overnight ECDC (yes/no): post boronization helium ECDC ICRF(yes/no): yes LH(yes/no): no Cryopump (yes/no): no DNB (yes/no): yes Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ Use post boronization helium ECDC |
| Session Leader Summaries |
| Entered: Aug 10 2012 06:42:23:647PM |
| Author: Mike Churchill |
| We accomplished most of the planned experiment.
Part 2: SSEP sweeps We had difficulty with this section. Although we accomplished EDA H-modes after initial RF tuning and boronization recovery, we couldn't get the H-mode to last after the transition from DN to USN, despite increasing RF power. The LSN to DN comparison should be useful for determining if these magnetic topology changes have an effect on the impurity densities. Part 3: L-gap scans We changed from the planned scan to sweep the L-gap from 14mm to 2mm from 0.9-1.3s, to have better coverage of the gas puff. We had several good shots, though the EDA H-mode portion didn't quite cover the entire scan (there was an ELM-free portion at the beginning) Part 4: Ip and RF scan in ELM-free H-mode We accomplished subparts 1. and 3 (2. was done on 1120803). The 1.2MA shot had several shorter ELM-free phases, it will need to be determined if the HFS coverage was good enough. Part 5: N2 Injections into Ohmic L-mode plasmas We only had a few shots for this part. The initial results are puzzling, there wasn't much CX enhancement in the NVII line due to the D2 gas puff. When puffing N2 from the HFS, no increase was seen on the LFS, but when reversed (N2 puff from LFS), there was signal on the HFS. This seems to be consistent with the finding of McCracken, that core nitrogen increases more when input from the LFS midplane vs the HFS midplane. |
| Entered: Aug 10 2012 06:54:10:447PM |
| Author: Jerry Hughes |
| SL_SUMMARY for 1120810 (2nd part)
Today we got some more data for MP715, keeping the same kinds of target plasmas that were created during the 1120807 afternoon run, but elevating the L-mode target density in order to raise the H-mode power threshold. At this we were somewhat successful, and we managed to establish a control discharge with a power threshold for which the ohmic heating does not dominate the auxiliary power. Following this we began adding our systematic Ip ramps to the "flattops" and adjusting RF in order to find the Pth at each Ipdot condition. Unfortunately we did not get very far into this key portion of the run plan. Progress was at first slowed by a number of fizzles and a data system problem. Then we were shut down due to a TF breaker failure, about 50 minutes before the EOR. There was not enough time to repair this before 6pm, so the run had to be aborted. Even with only 6 useful shots we appeared to establish at this new condition that (a) H-mode is more easily accessed in an Ip ramp-down for a given input auxiliary power and that (b) H-mode access is not significantly enhanced at a given auxiliary power by an Ip ramp-up. This is consistent with the lower density cases obtained three days ago, and with our anectodal experience. |
| Physics Operator Summaries |
| Entered: Aug 14 2012 09:01:06:543AM |
| Author: Bill Rowan |
| Run 1120810 was in support of
MP 648 "Direct boron density asymmetry measurements," SL: Mike Churchill MP715 "Do current ramps modify H-mode access?" SL: Jerry Hughes MP 648 setup was based on 1120803015 (due to Wolfe) with only the substitution of a recent segment 1. 1120803015 was the last shot from a scan for this MP. This run was a continuation of the earlier one. The segment 3 of that setup was immediately turned on to begin the ssep sweeps required for the MP. A few changes were made for better ICRF access including right gap adjustments and neon seeding. MP 715 was based on 1120807021 with tweaks to flatten rcur, improve control of density, and add current ramps. There may have been a leaks around shot 026 due to vessel cooling. Engineers were on the cooling problem before leaks were identified. The fizzles mostly occurred around the time that the leak was identified. The run ended with a breaker failure -- it failed to open at the beginning of a cell access. Score card 26 plasma 06 fizzles 32 total |
| Session Leader Comments | |||
| Aug 10 2012 09:22:37:520AM | 1120810001 | Mike Churchill | PLAN: Part 2: SSEP Sweep. EDA H-mode, 0.8MA, 3MW RF
RESULT: L-mode. No RF. CXRS timing didn't store. NEXT: Repeat |
| Aug 10 2012 09:42:11:417AM | 1120810002 | Mike Churchill | PLAN: Part 2: SSEP Sweep. EDA H-mode, 0.8MA, 3MW RF
RESULT: H-mode till 1s. RF drops from 3MW to 1.5MW around 0.8s. Brian and Ted's QCM detect signal suggests EDA from 0.74-0.89s. NEXT: Repeat |
| Aug 10 2012 09:43:28:900AM | 1120810003 | Mike Churchill | PLAN: Part 2: SSEP Sweep. EDA H-mode, 0.8MA, 3MW RF
RESULT: Fizzle. Could be used for NINJA gas calibration. NEXT: Repeat |
| Aug 10 2012 10:18:22:010AM | 1120810004 | Mike Churchill | PLAN: Part 2: SSEP Sweep. EDA H-mode, 0.8MA, 3MW RF
RESULT: H-mode. RF drops 0.9s, tripping afterwards. Neutral pressure high. NEXT: Repeat |
| Aug 10 2012 10:26:54:417AM | 1120810005 | Mike Churchill | PLAN: Part 2: SSEP Sweep. EDA H-mode, 0.8MA, 3MW RF
RESULT: Basically the same as 4. After the RF drops, stays in H-mode, but drops out of EDA NEXT: Repeat. Enable Ne. |
| Aug 10 2012 10:35:33:093AM | 1120810006 | Mike Churchill | PLAN: Part 2: SSEP Sweep. EDA H-mode, 0.8MA, 3MW RF
RESULT: H-mode till 1.1s. RF tripping after 1.0s, but J stays in longer. NEXT: Repeat. Decrease R-gap from 2cm to 1.5cm at request of Lin |
| Aug 10 2012 10:46:01:127AM | 1120810007 | Mike Churchill | PLAN: Part 2: SSEP Sweep. EDA H-mode, 0.8MA, 3MW RF
RESULT: L-mode. R-gap too low, ~0.3cm. NEXT: Repeat. Set R-gap to 1cm. |
| Aug 10 2012 11:07:09:100AM | 1120810008 | Mike Churchill | PLAN: Part 2: SSEP Sweep. EDA H-mode, 0.8MA, 3MW RF
RESULT: H-mode. Temporary transition to L-mode at RF trip (1s). R-gap in a better place (~1.5cm). NEXT: Repeat. Try to flatten R-gap response. |
| Aug 10 2012 11:19:52:270AM | 1120810009 | Mike Churchill | PLAN: Part 2: SSEP Sweep. EDA H-mode, 0.8MA, 3MW RF
RESULT: H-mode. Still not getting steady H-modes. NEXT: Repeat. Raise nl04 from 0.7 to 0.9. Increase RF power from 3MW to 3.5MW. |
| Aug 10 2012 11:40:13:610AM | 1120810010 | Mike Churchill | PLAN: Part 2: SSEP Sweep. EDA H-mode, 0.8MA, 3MW RF
RESULT: H-mode, steady till 1.2 (at USN point). NEXT: Repeat. Decrease R-gap to 1cm for TOR_GPI coverage. |
| Aug 10 2012 11:56:15:393AM | 1120810011 | Mike Churchill | PLAN: Part 3: L-gap scan. EDA H-mode, LSN, 3.5MW. Change gap scan from planned to sweep L-gap from 14mm to 2mm over 0.9-1.3s
RESULT: ELM-free H-modes. Neutral pressure still high. NEXT: Move on to Part 3: L-gap scan |
| Aug 10 2012 12:06:34:483PM | 1120810012 | Mike Churchill | PLAN: Part 3: L-gap scan. EDA H-mode, LSN, 3.5MW. Change gap scan from planned to sweep L-gap from 14mm to 2mm over 0.9-1.3s
RESULT: EDA. Gap scan from ~10mm to 4mm. Gap scan comes in transition period between ELM-free and EDA. If I can't make it steady on the next shot, move back the gap scan in time. NEXT: Repeat, trying to correct the gap scan. |
| Aug 10 2012 12:21:59:103PM | 1120810013 | Mike Churchill | PLAN: Part 3: L-gap scan. EDA H-mode, LSN, 3.5MW. Change gap scan from planned to sweep L-gap from 14mm to 2mm over 0.9-1.3s
RESULT: EDA. Nice shot. Gas puff doesn't last quite as long as the scan. NEXT: Repeat. Increase the kappa for TS. Put gas puff towards the end of the scan |
| Aug 10 2012 12:54:43:863PM | 1120810015 | Mike Churchill | PLAN: Part 3: L-gap scan. EDA H-mode, LSN, 3.5MW. Change gap scan from planned to sweep L-gap from 14mm to 2mm over 0.9-1.3s
RESULT: Still early H-mode transitions. NEXT: Move on. Part 4: ELM-free H-modes. Do Part 4.3 first |
| Aug 10 2012 02:09:26:707PM | 1120810018 | Mike Churchill | PLAN: Part 5: N2 injections
RESULT: See signal on IW, OW pretty low. NEXT: Repeat without attenuator fibers on POL_BCK. |
| Aug 10 2012 02:10:12:203PM | 1120810019 | Mike Churchill | PLAN: Part 5: N2 injections
RESULT: See signal on IW, OW pretty low again. Interesting. NEXT: Repeat, changing N2 puff to the HFS. |
| Aug 10 2012 02:16:28:637PM | 1120810020 | Mike Churchill | PLAN: Part 5: N2 injections
RESULT: Big increase on OW, presumably from N2. Some increase on IW. Need to consider that N penetration easier on the LFS. Not clear whether the D2 gas puff made any significant CX increase, relative to the N2 increase. NEXT: J. Hughes run |
| Aug 10 2012 02:27:53:773PM | 1120810021 | Jerry Hughes | Shot 21
Attempt a control shot with no Ip ramps, RF power ramp. Result: Too many H-modes. Power threshold is lower than we would like. (Ptot=1.8MW) Will try to increase Pth by raising target density, and will also request a lower power in the ramp. |
| Aug 10 2012 02:59:24:770PM | 1120810022 | Jerry Hughes | Shot 22.
Try again with nl04~1.5e20. Ramp ICRF from 0.5 to 1.5MW. Result: Big density overshoot, with very high neutral pressures. ICRF never gets above 0.5MW. L-mode/Ohmic, dense. Goes vertically unstable at the end, as elongation gets above 1.8! Looks like good Te coverage on TS, GPC and FRCECE. Next: Relax gas demand, lower elongation. |
| Aug 10 2012 02:50:32:627PM | 1120810023 | Jerry Hughes | Shot 23
Run with nl04=1.4e20 PO will correct for overshoot. Result: Fizzle. |
| Aug 10 2012 03:10:05:923PM | 1120810024 | Jerry Hughes | Shot 24.
Target: 5.47T, 0.93MA, nl04=1.4e20. Picrf ramp from 0.5MW to 1.5MW Result: Runs as desired, except the realized nl04 is closer to 1.2e20. First L-H obtained at Prf~1MW in the ramp at 0.87s. Ptot~2.MW Next: Flatten ICRF and raise density demand slightly. |
| Aug 10 2012 03:25:01:607PM | 1120810025 | Jerry Hughes | Shot 25
Target: 5.47T, 0.93MA, nl04=1.5e20. Picrf flat at 0.8MW Result: L-mode. RF stays on flat as demanded. There are drops in the density which don't have an obvious explanation, and the fueling increases beyond the demand after 0.9s. Density control was much better when we were running this at 0.9e20. Next: Raise ICRF demand. |
| Aug 10 2012 03:31:42:300PM | 1120810026 | Jerry Hughes | Shot 26:
Target: 5.47T, 0.93MA, nl04=1.5e20. Picrf flat at 1.0MW Result: Fizzle |
| Aug 10 2012 03:52:52:507PM | 1120810027 | Jerry Hughes | Shot 27.
Still on part 1(c) of run plan. Getting baseline threshold power. Target: 5.47T, 0.93MA, nl04=1.5e20. Picrf flat at 1.0MW Result: Got the desired RF. H-mode very soon after RF turn on. (Ptot~2MW) This and shot 25 would seem to bracket the power threshold. Just got knocked off the H.323. Will try to reconnect. Okay, I'm reconnected. |
| Aug 10 2012 04:11:08:703PM | 1120810028 | Jerry Hughes | Shot 28.
Take Prf = 0.8MW as being just below the power threshold. Set RF demand to this. Move on to part (2a) Change the current demand so that: 0.5--0.7s: flat 0.8MA 0.7--0.8s: ramp from 0.8 to 1.1MA 0.8--1.0s: flat 1.1MA 1.0--1.1s: ramp from 1.1 to 0.8MA 1.1--1.3s: flat 0.8MA 1.3--1.5s: ramp from 0.8 to 1.1MA 1.5-- : ramp down as usual Result: Ip ramps look good. Mostly L-mode. RF power is not flat in the ramp-up phase, probably because the plasma swings out and the right gap shrinks. We continue to stay out of H-mode in the flat Ip portion. Good. It looks like we get a short, dirty H-mode in the ramp-down phase at 1.06s. My scopes say Poh is high in this phase, leading to Ptot ~2.8MW. Subtracting Wdot will bring this closer to 2MW, though. All L-mode in the slow ramp-up phase. |
| Aug 10 2012 04:14:14:190PM | 1120810029 | Jerry Hughes | Shot 29.
Retry the fixed power case with Ip ramps, with better RF coupling. Result: Fizzle. Try again. |
| Aug 10 2012 04:42:34:007PM | 1120810030 | Jerry Hughes | Shot 30
Target: Retry the fixed power case with Ip ramps Result: Good shot. Got similar result, and cleaner RF during the ramp-up phase. Flat-Ip phases stay in L-mode (RF coupling is bad in 2nd 800kW phase) Fast and slow ramp-ups stay in L-mode Fast ramp-down has an L-H. |
| Aug 10 2012 04:51:10:863PM | 1120810031 | Jerry Hughes | Shot 31.
For this shot, make the following changes to RF demands: 0.5--0.7s: keep unchanged 0.7--0.8s: increase by 300kW 0.8--1.0s: keep unchanged 1.0--1.1s: decrease by 300kW 1.1--1.3s: keep unchanged 1.3--1.5s: increase by 300kW Waited to take this, so that we could get the Thomson re-armed, then ended up with a fizzle. Next: Retry. Data are stuck. Get the prybar. |
| Aug 10 2012 05:28:42:453PM | 1120810032 | Jerry Hughes | Shot 32.
Another fizzle, following an extended data hang and a cell access to address venting N2 from the DNB. Now an aroma is detected. A little "eau de TF breaker"? Run halted. |
| Physics Operator Comments | |||
| Aug 10 2012 09:04:12:170AM | Bill Rowan | load 1120803015
last shot from the previous run in support of this experiment Import segment 1 from 1120809001 Parker recommendation leave gp4 at 20 ms Turn off segment 02 and turn on segment 03 to move to part 2, ssep sweeps. Check upper triangularity on the first shot and adjust toward the value that Hughes recommends (0.344) for TeTS Check elongation on the first shot and possibly adjust toward the value that Hughes suggests as slightly preferable (1.7) for TeTS Load at 10-Aug-2012 09:03:30.00 Open tree /home/rowan/tmp.XvAO6G47dg -1 Open tree done | |
| Aug 10 2012 09:24:45:820AM | 1120810001 | Bill Rowan | 001.
plasma elongation is approx 1.7 sweep from LSN to DN to USN looks okay nl_04 = 1.3e+20 ip = 0.8 MA next shot no pcs changes |
| Aug 10 2012 09:38:43:197AM | 1120810002 | Bill Rowan | 002.
plasma. plasma target nl_04 = 0.8e+20 Next shot No pcs changes |
| Aug 10 2012 09:53:51:973AM | 1120810003 | Bill Rowan | 003.
plasma fizzle Next shot. reduce prefill by 2 ms from 20 to 18 Load at 10-Aug-2012 09:46:52.00 Open tree /home/rowan/tmp.XvAO6G47dg -1 Open tree done purging ninja plenum |
| Aug 10 2012 10:20:25:580AM | 1120810005 | Bill Rowan | 005.
plasma H-mode until 1.3 s Next shot enable neon, b-side lower, pg1 |
| Aug 10 2012 11:00:26:940AM | 1120810007 | Bill Rowan | 007.
plasma right gap is a problem here po error on right gap setup next shot. reload 1120810006 rcur increased by approx 0.003 |
| Aug 10 2012 11:35:32:883AM | 1120810008 | Bill Rowan | 008.
plasma right gap is approx 1.5 next shot right gap tweak (2 mm) between 1.3 and 1.5 s |
| Aug 10 2012 11:37:03:570AM | 1120810009 | Bill Rowan | 009.
plasma next shot continuing to tweak the right gap. small changes increase the nl_04 target to 0.9e+20 looking for constant h-mode |
| Aug 10 2012 11:34:40:670AM | 1120810010 | Bill Rowan | 010.
plasma nl_04 to 0.9 next shot. reduce the right gap to 1 cm. 0.003 mm increase in rcur |
| Aug 10 2012 12:06:56:737PM | 1120810011 | Bill Rowan | 011.
plasma next shot. return to 1120803015 which is in segment 2 so just turn on segment 2 left gap scan: 0.9 14mm 1.3 2 mm |
| Aug 10 2012 12:06:32:210PM | 1120810012 | Bill Rowan | 012.
plasma L gap 9 mm at 0.9 s 4 mm at 1.3 s next shot. modify left gap scan to be 0.9 14mm 1.3 2 mm |
| Aug 10 2012 12:29:45:300PM | 1120810013 | Bill Rowan | 013.
plasma L gap scan is from 13 mm to 2 mm next shot. modify kappa |
| Aug 10 2012 12:49:06:597PM | 1120810014 | Bill Rowan | 014.
plasma next shot change in RXU to change triangularity |
| Aug 10 2012 12:58:08:997PM | 1120810015 | Bill Rowan | 015.
plasma next shot. reload segment 2 from 1120803015 into segment 2 change outer gap to 1.0 from 1.3 tweak rxu to change triangularity |
| Aug 10 2012 01:06:09:257PM | 1120810016 | Bill Rowan | 016
plasma upper triangularity looks okay next shot IP = 1.2 MA change outer gap toward 1.0 |
| Aug 10 2012 01:29:03:777PM | 1120810017 | Bill Rowan | 017.
ip = 1.2 MA right gap approx 1.0 next shot. load from 1120627014. segment 2 is on import segment 1 from 1120810017 |
| Aug 10 2012 01:49:27:603PM | 1120810018 | Bill Rowan | 018.
plasma 0.8 MA nl_04 = 0.8e+20 next shot no pcs changes |
| Aug 10 2012 02:04:54:710PM | 1120810019 | Bill Rowan | 019.
plasma next shot. no pcs changes |
| Aug 10 2012 02:20:54:110PM | 1120810020 | Bill Rowan | 020.
plasma next shot End MP 648 (Churchill) Start mp 715 (Hughes) Load 1120807021 Import segment 1 of 1120810020 nl_04 = 1.3e+20 b-side lower disabled ninja is off, disabled argon puff at H-bottom: 0.3 s to 0.350 s |
| Aug 10 2012 02:26:28:357PM | 1120810021 | Bill Rowan | 021.
plasma 0.8 MA, target nl_04 = 1.3e+20 next shot rcur constant over entire flattop raise the nl_04 to 1.5e+20 |
| Aug 10 2012 02:43:50:540PM | 1120810022 | Bill Rowan | 022.
plasma next shot decrease zcur by 5 mm nl_04 integral gain off nl_04 proportional gain from 2 to 3 nl_04 = 1.4e+20 |
| Aug 10 2012 02:55:50:527PM | 1120810023 | Bill Rowan | 023.
fizzle -- maybe post disruption next shot reduce pg4 by 1 ms to 17 ms |
| Aug 10 2012 03:08:34:917PM | 1120810024 | Bill Rowan |
024. plasma nl_04 target = 1.2e+20 (actual) next shot nl_04 demand = 1.5e+20 |
| Aug 10 2012 03:21:01:550PM | 1120810025 | Bill Rowan | 025
plasma next shot. no pcs changes |
| Aug 10 2012 03:33:12:660PM | 1120810026 | Bill Rowan | 026.
fizzle suspect a leak due to vessel temperature next shot. no pcs changes |
| Aug 10 2012 03:52:14:640PM | 1120810027 | Bill Rowan | 027.
plasma next shot. Added current ramps as noted in step 2 of SL plan |
| Aug 10 2012 04:07:26:083PM | 1120810028 | Bill Rowan | 028.
plasma next shot. attempted to modify the right gap to remove the dip at 0.77 s |
| Aug 10 2012 04:21:08:807PM | 1120810029 | Bill Rowan | 029.
fizzle next shot no pcs changes |
| Aug 10 2012 04:32:25:573PM | 1120810030 | Bill Rowan | 030.
plasma next shot Additional changes in rcur to stabilize the right gap |
| Aug 10 2012 05:02:10:847PM | 1120810031 | Bill Rowan | 031.
fizzle next shot ic_ef4 changed from -1310 to -1300 |
| Aug 10 2012 05:21:18:140PM | 1120810032 | Bill Rowan | 032
fizzle next shot ic_ef4 changed from -1300 to -1320 End of the run. TF1 breaker failed to open for a cell entry. Engineers will need to work on the breaker. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:05:53:893AM | Plasma | Ok | |
| 2 | 09:26:04:233AM | Plasma | Ok | |
| 3 | 09:40:05:043AM | Plasma | Ok | |
| 4 | 09:59:58:683AM | Plasma | Ok | |
| 5 | 10:12:40:857AM | Plasma | Ok | |
| 6 | 10:26:47:657AM | Plasma | Ok | |
| 7 | 10:41:22:390AM | Plasma | Ok | |
| 8 | 10:56:27:157AM | Plasma | Ok | |
| 9 | 11:10:44:583AM | Plasma | Ok | |
| 10 | 11:26:03:220AM | Plasma | Ok | |
| 11 | 11:40:49:990AM | Plasma | Ok | |
| 12 | 11:56:32:810AM | Plasma | Ok | |
| 13 | 12:10:48:510PM | Plasma | Ok | |
| 14 | 12:28:18:217PM | Plasma | Ok | |
| 15 | 12:41:31:797PM | Plasma | Ok | |
| 16 | 12:59:02:860PM | Plasma | Ok | |
| 17 | 01:12:21:810PM | Plasma | Ok | |
| 18 | 01:37:39:597PM | Plasma | Ok | |
| 19 | 01:50:13:860PM | Plasma | Ok | |
| 20 | 02:02:40:513PM | Plasma | Ok | |
| 21 | 02:19:09:570PM | Plasma | Ok | |
| 22 | 02:32:27:557PM | Plasma | Ok | |
| 23 | 02:45:56:737PM | Plasma | Ok | |
| 24 | 02:58:27:180PM | Plasma | Ok | |
| 25 | 03:11:59:680PM | Plasma | Ok | |
| 26 | 03:26:21:347PM | Plasma | Ok | |
| 27 | 03:40:44:540PM | Plasma | Ok | |
| 28 | 03:55:56:900PM | Plasma | Ok | |
| 29 | 04:10:11:160PM | Plasma | Ok | |
| 30 | 04:23:27:913PM | Plasma | Ok | |
| 31 | 04:41:22:283PM | Plasma | Ok | |
| 32 | 05:09:02:153PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Aug 10 2012 09:05:33:877AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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