| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Matt Reinke,Catherine Fiore |
| Physics operator(s): | Anne White |
| Engineering operator(s): | Bill Cochran,Andy Pfeiffer,Gary Dekow |
| Engineering Operator Run Comment |
| automatically entered by signon - please replace with real comment |
| Session Leader Plans |
| Entered: Dec 15 2010 03:38:24:593PM |
| Author: Matt Reinke |
| No ECDC the night before.
20 psi N2 in B-SIDE-LOWER 1.2 psi Ar in H-BOTTOM Pick up where we left off on 1101215. We need to test the reproducibility by starting with last nights ending shot. Optimize this with a quick N2 scan then move to the lower Ip section. Then depending on time, move back up in Ip and complete another fiducial. 1) Load 1101215027 and repeat to check reproducibility from day-to-day (2 shots) 2) Increase N2 level to try and match PNET from 1101215012 for the 0.9 MA case (1-2 shots) 3) reduce Ip to 0.7 MA, nl04=0.8, ICRF 4-5 MW (2-3 shots) 4) reduce Ip to 0.6 MA, nl04=0.7, ICRF 4-5 MW (2-3 shots) 5) load 1101215014 pickup the Ip=1.0 MA shot with N2 seeding (2 shots) 6) repeat the fiducial (1 shot) |
| Physics Operators Plans |
| Entered: Dec 14 2010 01:15:11:437PM |
| Author: Anne White |
| PO Plan for 16 Dec 2010
AM Experiment: MP630: Expanding the operating space of high performance impurity seeded EDA H-modes PO: A. White SL: M. Reinke PM Experiment: MP477: Formation of Ohmic H-mode ITB with Improved Diagnostic Set PO: A. White SL: C. Fiore This run day will begin at 09:00 and end at 17:00. There is to be NO ECDC and NO BORONIZATION before the start of todayâ??s run! ------------------------------- Engineering Setup AM ------------------------------- Power systems as on: 1100903028 or 1101215xx (last good shot of 12/15/10 run day) LSN configuration 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 4 psi Ne Hybrid enabled (PG1) fill H-bottom with 1 psi Ar Hybrid enabled (PG5) 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 DISABLED NOTE: Have N2 available on the gas manifold for possible use later in the day. Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus Leave z-bolo shutter as is (should be open) Torvac gatevalve toggle (yes/no): no NO Boronization overnight NO morning ECDC ICRF: yes, all transmitters needed for D(H) heating at 5.4T LH: no Cryopump: have available, and ready for first shot if SL so desires DNB: yes Vessel temperature: 45/45/45 SL plan calls for on 1101216 (4) boronization hysteresis, (5) current scan down and (6) more boronization hysteresis. Starting PO plan for today where Hughes PO plan from yesterday left off. Detailed AM plan: FIRST SHOT: May need cryopump on first shot, based on whether or not it was used in current scan from Day 1. Load up Jerryâ??s last good from Mattâ??s run yesterday shot 1101215xxx. This will have good startup, proper programming in Segment 2, and the adjusted final shape from Day 1. This shot will likely be at Ip = 0.9 MA , or the best selected discharge from Current Scan part 3 on Day 1. FOLLOWING SHOTS: *****Pick up where we left on 1101215***** 4) Boronization Hysteresis (2 shots) ========================== repeat selected discharges from Current Scan from Day 1 in order to test the repeatability across run days a) Ip=0.9 MA b) Ip=1.1 MA 5) Current Scan Down (4-8 shots) ==================== Decrease current by 50 kA steps, keep target nl04~0.8x10^20, return to Ne seeding. At each current point, run two shots. a) Ip=0.7 MA b) Ip=0.6 MA. 6) More Boronization Hysteresis (3 shots) =============================== Repeat selected discharges from parts (3) and (5) in order to test the repeatability over ICRF input MJ. a) Ip=0.9 MA b) Ip=1.2 MA c) Ip=0.6 MA ------------------------------- Engineering Setup PM ------------------------------- Changes from AM: Torvac setup: gatevalves open ICRF: ready, may be used later in afternoon; all transmitters needed for D(H) on-axis heating at 5.0T LH: no Cryopump: no DNB: yes Note on Gas setup for PM experiment: HIREX SR data is needed. So they want to puff 100 ms of Argon early (0.3 sec) and then an additional short 10-15 ms of Argon later in shot. Based on Gas setup from AM, we will be doing HIREX Argon puff with PG5 not the usual PG1. PG1 today has Neon in it, so need to be sure that we just program in NO PG1 pulse for ITB PM runâ?¦. Need to double check with Wolfe how best to do this. PO PLANS: SL plan calls for setting up Ohmic target shots with an ITB using a Bt ramp that starts at 5.3 T and goes first down to 3.2 T then up to 4.6 T. They may also want to put in small increments on 200 kW ICRH at 5 T to get on axis heating. In the past, 1070628, this experiment had overnight boronization before they ran. Since now it is only a half day in the PM, they will be trying this run 1.5 days after boronization, and likely making some disruptions, so expect to see impurities up. FIRST SHOT: Startup segment: take a successful segment 1 startup from AM run Equilibrium segment: need to load in segment 2 from SL shot of choice from Run 1070628. This should then be a target shape compatible with DPCS, even though the run is from 2007, but we may have to tweak CLEARIN and RCUR. My guess is that 1070628019 is a good target shot. Note that these ITB shots from 2007 end in disruptions between 1-1.3 seconds. Steve Wolfe noted that the lower triangularity shots from 1070628 had longer lasting ITBs, so perhaps SL has a trophy shot in mind. FOLLOWING SHOTS: Alter shape, BT waveform, triangularity, with/without late 15 ms Ar puff, to try and get nice long ITBs. Follow recipes from 2007 run or per session leader requests. |
| Session Leader Summaries |
| Entered: Dec 16 2010 01:46:06:643PM |
| Author: Matt Reinke |
| Another good run day for the seeded EDA H-modes. We got the Ip=0.7 MA data point and was able to compare N2 seeding from B-SIDE-LOWER and H-BOTTOM. We tried to recover/optimize the fiducial at the end of the day with no success.
The fiducial shot 1101216001 which was a repeat of 1101215027 loaded up and ran just fine and was similar enough to confirm that letting the machine sit overnight didn't change things very much at all. We tried to optimize the N2 seeding to try and improve the fiducials performance, but we never got close to 1101215012. When we came back to it at the end of the day, things were even worse. Despite poor 0.9 MA H-modes, we moved to 0.7 MA and recovered very high normalized performance with H98 ~ 1.1. This put tremendous amount of energy into the K and G/H limiter so we didn't go down any farther. We increased to Ip=0.8 MA and increased the outer gap, but we still but a large amount of heat onto K-LIM. We worked to get a steady 0.8 MA EDA H-mode but was only able to get one w/o D-ANT (011,012). We then moved the N2 puff to H-BOTTOM for a comparison of seeding location (013, 014) and found that steady H-modes couldn't be made at two different seeding levels. This should provide an interesting starting point for the gas puff optimization experiments. The low current, Ip=0.7 MA, shots exhibited very strong, probably to melting, levels of energy flux to the K-LIM and to a lesser extent, the G/H limiter. We increased the Bt to 5.6 which Wukitch suggested might decrease fast ion loss, but things got worse. Even at 0.8 MA we still got significant heating on the K-LIM until D-ANT stopped working. Some interesting data points for figuring out how the limiters are overheating. SHOT 001-004 : Ip=0.9 MA, N2 variation+fiducial SHOT 005-006 : Ip=0.7 MA, N2 seeding. SHOT 007-012 : Ip=0.8 MA, B-SIDE LOWER SHOT 013-014 : Ip=0.8 MA, H-BOTTOM SHOT 015-019 : Ip=0.9 MA, N2 variation+fiducial |
| Entered: Dec 16 2010 05:32:51:043PM |
| Author: Catherine Fiore |
| MP 477-Ohmic ITB. The goal is to get good diagnostic measurements, ti, rotation, density fluctuations on an Ohmic ITB plasma. The challenge of course is to establish a good Ohmic ITB. We're starting with a shot from 2008 by Brian Labombard that had a good Ohmic H-mode and a nice long lasting ITB-1080313018.
We began on shot 20. 1101216020-Good target, goes into H-mode. No ITB. We'll try to get the flat top to start a little earlier. There may be a problem with getting signal from the DNB 1101216021-Good target, goes into H-mode. No ITB on this shot. We accidently failed to disable the NINJA. 1101216022-Good target, goes into H-mode. No ITB on this shot. All three shots have very slight peaking in the H-mode, but are not impressive. 1101216023-ITB on this shot finally. Still trying to figure out how to get it into H-mode earlier. Argon was off, but we'll turn it back on next shot. The suggestion is to drop the target density slightly. 11101216024-Weak ITB? We'll extend the length of the shot to take advantage of the late H-mod. 1101216025-Weak ITB, but disruption in ramp dow. We're going to eliminate the low field jag to see if it has an effect on the H-mode onset time. 1101216026-Disrupted right after ITB starts. 1101216027-Nice H-mode with no ITB. Try turning off the argon once again. 1101216028-ITB, but back transition shortly afterwards. We'll try returning to the standard field ramp and try to see if we can trigger the H-mode earlier. Argon was off, but we're turning it back on for the next shot. 1101216029-Disrupts right at the H-mode transition. 1101216030-Nice long H-mode, with slight peaking. 1101216031-H-mode transition, followed by immediate back transition, re-strike and disruption. 1101216032-Two short H-modes then a disruption. 1101216033-Disrupted before H-mode could start. 1101216034-Disrupted before H-mode could start. 1101216035-Good H-mode but not much peaking. 1101216036-H-mode with peaking-likely a weak ITB. 1101216036-Nice H-mode with some peaking-likely a weak ITB. Several of these marginal ITB shots are showing peaking of the boron density. Best shots:1101216023,028,036,037. Sshot 28 is the only one that I'm sure has an ITB. Overall this was not a satisfying run. Getting the Ohmic H-mode ITB was much more difficult than it has been on prior attempts. We had some improvement after raising the density, but we lacked clear ITB signatures. Our previous sure fire formulas did not seem to work. Ultimately the success will be judged by what we learn from the Hirex and CXRS diagnostics. |
| Physics Operator Summaries |
| Entered: Dec 16 2010 05:34:47:123PM |
| Author: Anne White |
| Phys Op Summary
Run 1101216 Machine ran well. We took a lot of shots: 37 total shots taken. 26 full length plasmas. 11 disruptions. No fizzles and no duds -- obviously the result of using Hughes' Star Startup from yesterday. ****************************************************************************** ******************** AM Experiment ************************* ****************************************************************************** MP630: Expanding the operating space of high performance impurity seeded EDA H-modes PO: A. White SL: M. Reinke AM Summary: Shots 1101216001-019 Start-up segment from Jerry Hughes worked perfectly, and we made no changes during the AM. Later shots had some late breakdowns, but no fizzles in startup occurred and no bounces were seen even though we seemed to have a chronic but benign secondary uptick in tang z meter at t = 0.15 sec on many shots. We were able to toggle the gas and the fueling to vary the seeding very well for the experiment. SL collected good data, but did not seem to get the highest performance anticipated.Encountered significant K limiter heating at the lower current 0.7 MA, so only ran one shot there. Rest of the shots we took at 0.8 MA-0.9 MA. Had 4 disruptions, all looked to be from something falling in. Shots that ran to completion: 19, 17, 15, 14, 13, 12, 11, 10, 9, 8, 6, 5, 3, 1 ****************************************************************************** ******************** PM Experiment ************************* ****************************************************************************** MP477: Formation of Ohmic H-mode ITB with Improved Diagnostic Set PO: A. White SL: C. Fiore PM Summary : Shots 1101216020-37 We were able to load the reference from 2008 with minor changes. We did have to recalculate the magnetic predictors. See notes from shot 20 from details on this. The only possible effect of the AM changeover may have been remnants of the N2 which caused high background signals on the CXRS. But we ultimately seemed to pin the excess gas and excess CXRS background noise on the NINJA puff rather than on leftover N2. The NINJA was enabled for stealth puff mode late in the shots until we disabled it before shot 22. Machine ran well, but it was difficult to reproduce conditions for ITB to occur. Initially, even with the Bt swing we could not get the LH transition before 1.5 sec. Early on it seemed that the Ar puff for HIREX was also affecting the ability to get the transition. We turned off the puff, which was 100 ms in the reference shot. But then we were able to get what looked like the best shots of the run (36-37) with a reduced 50 ms Ar puff, so there should be some HIREX data there. We extended the pulse length on Ip and Bt and all the shaping wires by 100 ms compared to the reference shot in order to collect more data in the H-mode phase starting at shot 25. We even removed the Bt swing in shots 26 and 27 �?? and still got the late H-mode transition. It was noted by Catherine that going back to shots from 2002, we saw that the Bt swing went from 3.2 T to 4.5 T rather than 2.3 to 4.5 T that we had in the reference shot. So we made this the new swing starting at shot 33. With modifications to Bt swing timing and nl04 and possible uncontrolled changes to wall conditions late in the afternoon, we got one shot with early H-modes near 1 sec (shot 30). But generally, all the H-modes came later, between 1.2-1.4 seconds. Also, it seemed we could not run with NL04 requests at 0.8 e20, as this was the request when we had the only two sequential disruptions of the day: in the current ramp: Shots 33 and 34. Overall, it was difficult o get the early H mode transitions at the time of the Bt up swing. And could not get the Ohmic EDA H-modes that were good for making ITBs in the past. It may be good to explore whether or not the effect of not having ECDC the night/morning before was important, whether this limited getting the higher densities (NL04 0.8 e20) that were seen in the shots from the 2002 ITBs plasmas is not known. There were 7 shots that had disruptions. Likely caused on most cases by injections, but 33 and 34 may have been caused by too high of a density request early in the current ramp. The following shots ran to completion with no problems: 20,21,22,23,24,27,28, 30, 35, 36, 37 |
| Session Leader Comments | |||
| Dec 16 2010 09:07:50:097AM | 1101216001 | Matt Reinke | We're looking to pickup right where we left off yesterday. We'll repeat the 1101215027 "fiducial" shot to see if we letting the machine sit over night changes the reproducability.
900 kA, 4-5 MW ICRF power, N2 seeding 0.5-1.4 @ 60 V w/ 20 psi in B-SIDE-LOWER. RESULT: ICRF performed well, trips at H/L transitions but that's expected. Mo up a little, N2 down a little. Perhaps lost some residual N2 over night? NEXT: Increase N2 to 80 V and repeat. |
| Dec 16 2010 09:17:43:987AM | 1101216002 | Matt Reinke | Increasing N2 to get steady N2 seed point at 0.9 MA
RESULT: Fe brick fell in at 0.205 NEXT: Repeat, hopefully w/o the carnage. |
| Dec 16 2010 09:36:49:407AM | 1101216003 | Matt Reinke | Try again for the higher N2, 0.9 MA shot
RESULT: increased seeding didn't suppress the moly as anticiapted NEXT: move to lower Ip=0.7, nl04=0.8 target. Same 4-5 MW ICRF. |
| Dec 16 2010 09:48:11:863AM | 1101216004 | Matt Reinke | moving on with Ip scan to lower current, Ip=0.7 MA
RESULT: Too much N2, the edge Te is cratering right as the ICRF turns on. This one just makes it but struggles. Nothing too horrible for limiter heating, 50-75 degC. NEXT: Lower N2 puff to 60 V and repeat. |
| Dec 16 2010 10:05:52:967AM | 1101216005 | Matt Reinke | decreasing N2 level and trying again for 0.7 MA point.
RESULT: Great shot! Have something kick in at 1.0 seconds (low-freq on magnetics) that enhances confinement slightly. I take that back, we cooked K-LIM, 400 deg C rise. NEXT: increase the toroidal field to 5.6 T, shifting resonance to LFS. Wukitch suggests this should help the fast-ion losses which we think is what's heating the limiter. |
| Dec 16 2010 10:18:19:810AM | 1101216006 | Matt Reinke | repeat w/ increase in Bt to help decrease fast ion losses
RESULT: A nice steady H-mode again. A bit of a Mo bloom at 1.1 seconds. But an even bigger hurt on the K-LIM on this shot, G/H limiter had more heating too. NEXT: Move to Ip=0.8, Bt back to 5.4 T. |
| Dec 16 2010 10:29:28:540AM | 1101216007 | Matt Reinke | Increase Ip to 0.8 MA to see if we can get rid of excessive limiter heating with a small current change. Increase nl04 to 0.9.
RESULT: Got a transient H-mode, large Mo rise. Why it doesn't got back into H-mode after 1.0 is strange w/ that much input power. K-LIM energy flux reduced, but not a good comparison because of the short H-mode. NEXT: increase nl04 target to 1.0, set N2 to 70 V. |
| Dec 16 2010 10:44:28:750AM | 1101216008 | Matt Reinke | Increase N2 puff and target density to lower Mo and bring out a better EDA.
RESULT: more short lived H-modes, Mo down target nl04 better. NEXT: decrease N2 to 50 V. Try and recover a steady H-mode at 0.8 kA. Increase right gap to try to avoid limiter heating (to 1.7 cm). Also, filling H-BOT for later use as gas fueling, turn of Ar puffing for now. |
| Dec 16 2010 10:58:21:263AM | 1101216009 | Matt Reinke | Increasing right gap, decreasing N2 puffing. Ar turned off since we'll use H-BOT for divertor puffing shortly.
RESULT: This one ALMOST made it to steady-state H-mode. We lose J at 0.71 and an injection at 0.73 push it into a cycle of H/L transitions. Also the density is not getting to the demand. We're at nl04=1.0 in DPCS but only getting ~ 0.8 in the plasma. NEXT: ICRF tuning up with 009 gap, increase nl04 target to 1.15 to bring it up in the plasma to a more respectable EDA. |
| Dec 16 2010 11:09:35:250AM | 1101216009 | Matt Reinke | Work for cleaner ICRF, higher target density.
RESULT: Got the density I wanted, but the ICRF was poor. Lost D-ANT, poor J-coupling. NEXT: repeat with ICRF tune |
| Dec 16 2010 11:20:03:117AM | 1101216011 | Matt Reinke | Repeat of 010 w/ better ICRF
RESULT: Nice steady H-mode, but still no D-ANT. Note that this and the last shot had VERY small limiter heating despite only missing D-ANT. NEXT: Try to get D-ANT |
| Dec 16 2010 11:34:17:857AM | 1101216012 | Matt Reinke | Try again to get some D-ANT power. If not able to get it, go on to N2 puff comparison shots w/o it.
RESULT: No D-ANT again, but got a good H-mode that can be repeated. NEXT: Try a fueling location scan. 0.5-1.4 sec of H-BOT @ 60 V (9 psi N2). |
| Dec 16 2010 11:52:06:380AM | 1101216013 | Matt Reinke | Try a comparison of fueling N2 from H-BOT vs. B-SIDE-LOWER. Using 60 V on a 10 psi 0.5-1.4 second pulse. Rough estimate is H-BOT twice as high a throughput as B-SIDE-LOWER so this SHOULD be a similar amount of input gas.
RESULT: Similar level of N2, Zeff/PRAD close, but got much more ELM-Free like H-modes. NEXT: Decrease to 45 V, move puff to 0.45-1.35 to adjust for H-BOT delay relative to B-SIDE. |
| Dec 16 2010 12:02:07:097PM | 1101216014 | Matt Reinke | Repeat with tweaks to the H-BOT puff
RESULT: still many H-modes NEXT: Move back to 001 BZN fiducial shot |
| Dec 16 2010 12:19:50:790PM | 1101216015 | Matt Reinke | Repeat of 001, the BZN fiducial
RESULT: initial trajectory looked ok, but got a Mo injection at 0.75. Going to stay here for the rest of the day, trying to tweak up the best confinement shot. NEXT: Increase nl04 target to 1.1, decrease N2 to 40 V on B-SIDE-LOWER |
| Dec 16 2010 12:28:40:033PM | 1101216016 | Matt Reinke | Tweaking the fiducial.
RESULT: Ni brick at just before 0.4 seconds. NEXT: repeat w/o the carnage |
| Dec 16 2010 12:45:54:910PM | 1101216017 | Matt Reinke | Try again
RESULT: many H-modes, high moly. Got the target nl04 NEXT: increase N2 to 100 V |
| Dec 16 2010 12:57:05:477PM | 1101216018 | Matt Reinke | Tweak the fiducial, more N2
RESULT: Death by N2 NEXT: Get one more crack at the high N2 case. 90 V starting at 0.54 |
| Dec 16 2010 01:07:14:480PM | 1101216019 | Matt Reinke | Last attempt at tweaking the N2 to try and recover a good H-mode after a bazillion MJ of RF input energy since BZN.
RESULT: not the awesome discharge I was looking for NEXT: Last shot for MP 630 |
| Dec 16 2010 01:38:10:213PM | 1101216020 | Catherine Fiore | Good target, goes into H-mode. No ITB. We'll try to get the flat top to start a little earlier. There may be a problem with getting signal from the DNB |
| Dec 16 2010 01:45:34:053PM | 1101216021 | Catherine Fiore | Good target, goes into H-mode. No ITB on this shot. We accidently failed to disable the NINJA. |
| Dec 16 2010 01:59:27:073PM | 1101216022 | Catherine Fiore | Good target, goes into H-mode. No ITB on this shot. All three shots have very slight peaking in the H-mode, but are not impressive.
|
| Dec 16 2010 02:10:39:570PM | 1101216023 | Catherine Fiore | ITB on this shot finally. Still trying to figure out how to get it into H-mode earlier. Argon was off, but we'll turn it back on next shot. The suggestion is to drop the target density slightly. |
| Dec 16 2010 02:22:25:520PM | 1101216024 | Catherine Fiore | Weak ITB? We'll extend the length of the shot to take advantage of the late H-mod. |
| Dec 16 2010 02:37:55:720PM | 1101216025 | Catherine Fiore | Weak ITB, but disruption in ramp dow. We're going to eliminate the low field jag to see if it has an effect on the H-mode onset time. |
| Dec 16 2010 02:48:56:967PM | 1101216026 | Catherine Fiore | Disrupted right after ITB starts. |
| Dec 16 2010 03:02:15:560PM | 1101216027 | Catherine Fiore | Nice H-mode with no ITB. Try turning off the argon once again. |
| Dec 16 2010 03:18:08:293PM | 1101216028 | Catherine Fiore | ITB, but back transition shortly afterwards. We'll try returning to the standard field ramp and try to see if we can trigger the H-mode earlier. Argon was off, but we're turning it back on for the next shot. |
| Dec 16 2010 03:25:33:580PM | 1101216029 | Catherine Fiore | Disrupts right at the H-mode transition. |
| Dec 16 2010 03:47:02:723PM | 1101216030 | Catherine Fiore | Nice long H-mode, with slight peaking. |
| Dec 16 2010 03:55:05:830PM | 1101216031 | Catherine Fiore | H-mode transition, followed by immediate back transition, re-strike and disruption. |
| Dec 16 2010 04:06:13:993PM | 1101216032 | Catherine Fiore | Two short H-modes then a disruption. |
| Dec 16 2010 04:16:27:853PM | 1101216033 | Catherine Fiore | Disrupted before H-mode could start. |
| Dec 16 2010 04:27:42:640PM | 1101216034 | Catherine Fiore | Disrupted before H-mode could start. |
| Dec 16 2010 04:44:44:477PM | 1101216035 | Catherine Fiore | Good H-mode but not much peaking. |
| Dec 16 2010 04:58:13:900PM | 1101216036 | Catherine Fiore | H-mode with peaking-likely a weak ITB. |
| Dec 16 2010 05:13:53:180PM | 1101216037 | Catherine Fiore | Nice H-mode with some peaking-likely a weak ITB. Several of these marginal ITB shots are showing peaking of the boron density. |
| Physics Operator Comments | |||
| Dec 16 2010 08:13:00:937AM | 1101216001 | Anne White | First shot of run 1101216
Load in shot 1101215027 This shot had good startup segment and was a good stopping point dueing the current scan yesterday. |
| Dec 16 2010 09:12:21:400AM | 1101216001 | Anne White | First shot of run 1101216
Load in shot 1101215027 This shot had good startup segment and was a good stopping point dueing the current scan yesterday. Result: Shot Ran Startup had lower gside pressure than fiducial shot 27 from yesterday. decreasing from 0.7 - 0.4 over time range t = 0-0.05 sec compared to 0.9-0.8 steady on shot 27 also some spikes on halpha and CII at t = 0.04 sec Next shot: increase voltage on pg1 to 80 V from 60 V, keep same pulse length pg1 has N2 now for seeding (pg1 = BSIDE lower) |
| Dec 16 2010 09:23:45:410AM | 1101216002 | Anne White | Changes from last shot:
increased voltage on pg1 to 80 V from 60 V in seg 2, keep same pulse length pg1 has N2 now for seeding no changes to startup Result: disruption early near t = 0.24 sec looks like something fell in startup was okay, gside pressure coming up early in time compared to shot 1 make no changes there for now Next shot: No PO changes. |
| Dec 16 2010 09:35:18:503AM | 1101216003 | Anne White | Changes from last shot:
No PO changes. Result: shot ran Next Shot: Lower the current to 0.7 MA and lower target nl04 density to 0.8x10^20 |
| Dec 16 2010 09:47:20:103AM | 1101216004 | Anne White | Changes from last shot:
Lower the current to 0.7 MA and lower target nl04 density to 0.8x10^20 Result: shot ran, but disrupted near end at t = 1.5 sec or so Next Shot: lower voltage on PG1 to 60 (it was 80) |
| Dec 16 2010 10:08:24:267AM | 1101216005 | Anne White | Changes from last shot:
lower voltage on PG1 to 60 (it was 80) Result: shot ran some jump in tang zmeter in startup at t = 0.015 after initial burn through, but early ece signals don't seem to show this as a bounce. Next Shot: go up in field to 5.6 T in flattop normally TF Current in -150,000 is 5.4 T, so by linear scaling let's make TF current at -155,555 to try to get 5.6 T note we make this change in seg 2 only. |
| Dec 16 2010 10:21:04:197AM | 1101216006 | Anne White | Changes from last shot:
go up in field to 5.6 T in flattop normally TF Current in -150,000 is 5.4 T, so by linear scaling let's make TF current at -155,555 to try to get 5.6 T Result: shot ran Next Shot: Increase Ip current, 0.8MA and reduce Bt back to 5.4T (TF_CURRENT -150000) Increase nl04 to 0.9x10^20 |
| Dec 16 2010 10:30:41:267AM | 1101216007 | Anne White | Changes from last shot:
Increase Ip current, 0.8MA and reduce Bt back to 5.4T (TF_CURRENT -150000) Increase nl04 to 0.9x10^20 Result: shot ran, but disrupted around t = 1.4 sec or so startup we still get uptick in tang z meter in start up near t= 0.015 sec or so but no bounce on ece apparently Next Shot: increase target nl04 to 1.0x10^20 increase PG1 voltage to 70 V |
| Dec 16 2010 10:47:16:613AM | 1101216008 | Anne White | Changes from last shot:
Increase Ip current, 0.8MA and reduce Bt back to 5.4T (TF_CURRENT -150000) Increase nl04 to 0.9x10^20 Result: shot ran the uptick in tang z meter at t = 0.015 sec in startup has definitelyt increased significantly from last shot. no bounce in ece and no concurrent uptick in halpha. Bz looked okay compared to fiducial shot 27 from yesterday. gside pressure is still lower than yesterday and decreasing in time, but the value at t = 0.015 when we see this increase in brightness is similar to yesterday Next Shot: decrease voltage on pulse gas 1 to 50 V and increase outer gap to 1.7 cm. it was at 1 cm increase outer gap by 0.007 m, so reduced RCUR by 0.0035 m |
| Dec 16 2010 10:55:29:883AM | 1101216009 | Anne White | Changes from last shot:
decrease voltage on pulse gas 1 to 50 V and increase outer gap to 1.7 cm. it was at 1 cm increase outer gap by 0.007 m, so reduced RCUR by 0.0035 m Result: shot ran analysis efit shows right gap settlingat 1.5 cm avg , increased from 1.0 cm avg from last shot in startup, the uptick in tang z meter is gone at t = 0.015 sec Next shot: Next shot: increase nl04 request to 1.15x10^20 |
| Dec 16 2010 11:10:06:747AM | 1101216010 | Anne White | Changes from last shot:
increase nl04 request to 1.15x10^20 Result: shot ran Next shot: no DPCS changes |
| Dec 16 2010 11:19:04:027AM | 1101216011 | Anne White | Changes from last shot:
no DPCS changes Result: shot ran Next shot reduce NL04 demand to 1.1x10^20 |
| Dec 16 2010 11:40:43:053AM | 1101216012 | Anne White | Changes from last shot:
reduce NL04 demand to 1.1x10^20 Result: shot ran Next shot: enable H bottom. program pulse gas 5 to a 60 Volt request from t = 0.5 - 1.4 sec disable Bside lower. leave the programmed pulse in at pulse gas 1 for now |
| Dec 16 2010 11:54:18:570AM | 1101216013 | Anne White | Changes from last shot:
enable H bottom. program pulse gas 5 to a 60 Volt request from t = 0.5 - 1.4 sec disable Bside lower. removed the programmed pulse in at pulse gas 1 for now Result: shot ran Next shot: Change pulse gas 5 (N2 puff) to t = 0.45-1.35 sec instead of 0.5-1.4 sec and decrease voltage to 45 V |
| Dec 16 2010 12:02:08:157PM | 1101216014 | Anne White | Changes from last shot:
Change pulse gas 5 (N2 puff) to t = 0.45-1.35 sec instead of 0.5-1.4 sec and decrease voltage to 45 V Result: shot ran Next shot: load from shot 1101216001 |
| Dec 16 2010 12:14:12:553PM | 1101216015 | Anne White | Changes from last shot:
load from shot 1101216001 Result: Shot ran startup still looks good Next shot: raise target nl04 to 1.1x10^20 pg1 voltage decreased to 40 V |
| Dec 16 2010 12:31:55:780PM | 1101216016 | Anne White | Changes from last shot:
raise target nl04 to 1.1x10^20 pg1 voltage decreased to 40 V Result: Plasma disrupted at t = 0.44 sec disruption seemed to cause problem with OH1 supply, checking it out now. startup had second uptick in tang z meter again at t = 0.015 sec Next shot: repeat no DPCS changes |
| Dec 16 2010 12:44:48:037PM | 1101216017 | Anne White | Changes from last shot:
no DPCS changes Result: shot ran in startup still have the tang z meter uptick at t = 0.015, but no bounce on ece... Next shot: set PG1 to 100 V |
| Dec 16 2010 12:57:37:053PM | 1101216018 | Anne White | Changes from last shot:
set PG1 to 100 V Result: disruption at t = 0.6 sec Next shot: PG1 set to 90 V, start of pulse is requested at t = 0.54 sec. |
| Dec 16 2010 01:23:32:203PM | 1101216019 | Anne White | Changes from last shot:
PG1 set to 90 V, start of pulse is requested at t = 0.54 sec. Result: Shot ran Next shot: Will be the first shot of Fiore PM exp, MP 477 |
| Dec 16 2010 01:32:19:137PM | 1101216020 | Anne White | PM EXPERIMENT MP 477
Shot 1101216020 is first shot of PM experiment SL Fiore PO White Changes from last shot: For this shot, keep seg 1 startup from AM import segment 2 from shot 1080313018 --> recalculate magnetics 1) bring up wires in segment 2 (e.g. RCUR, ZCUR, etc.) 2) if an algorithm is used, you need to call it to recalculate predictors 3) when it is done, you need to make sure you click APPLY 4) you will get new window with message, then go to next wire --> click on the V1-16, check for messages --> click on the V17-32, check for messages, if message, click on traces to update names --> check that Ip, nl04 as as SL requests Changed the Bt reincrease alue to 4.5 T, which is at -125000 on TF_CURRENT Result: Shot ran Next shot: begin ramp back up to 4.5 T at 0.8 sec instead of at 0.96 sec. |
| Dec 16 2010 01:41:17:243PM | 1101216021 | Anne White | Changes from last shot:
begin ramp up from 2.3 T (-64480 TF_CURRENT) to 4.5 T (-1250000 TF_CURRENT) at 0.8 sec instead of at 0.96 sec. Result: shot ran breakdown was a tiny tad late...keep eye on it Next Shot: |
| Dec 16 2010 02:02:27:940PM | 1101216022 | Anne White | Changes from last shot:
no DPCS changes actually disable NINJA puff (as requested in gas setup in PO plan) Result: shot ran breakdown came slightly late again it seems Next shot: no Argon puff |
| Dec 16 2010 02:12:15:010PM | 1101216023 | Anne White | Changes from last shot:
no Argon puff Result: shot ran Next shot: put back in a 50 ms Ar puff on PG1 from t = 0.3-0.35 sec reduce NL04 request to 0.6e20 (down from 0.65) |
| Dec 16 2010 02:30:06:270PM | 1101216024 | Anne White | Changes from last shot:
put back in a 50 ms Ar puff on PG! from t = 0.3-0.35 sec Result: Shot ran Next Shot: Extend flat top of shot by 100 ms: 1) Extend Ip to 1.6 sec 2) extend Bt to 1.75 sec (invert tim eat 3 sec). 3) from All P's screen extend all the shape control wires by 100 ms 4) Request from engineers that fizzle detector extend out to 2.1 sec |
| Dec 16 2010 02:37:52:553PM | 1101216025 | Anne White | Changes from last shot:
Extend flat top of shot by 100 ms: 1) Extend Ip to 1.6 sec 2) extend Bt to 1.75 sec (invert tim eat 3 sec). 3) from All P's screen extend all the shape control wires by 100 ms 4) Request from engineers that fizzle detector extend out to 2.1 sec Result: Shot ran but disrupted in ramp down around t = 1.64-1.66 sec or so Next shot: Extend the IC_EF4U by 100 msec, may not be related to disruption, but extend it anyway. Remove the field ramp. Now, reduce Bt early to 4.5 T and hold steady there for entire shot. (i.e. skip the Bt = 2.3 T period before 0.8 sec.) |
| Dec 16 2010 02:56:21:373PM | 1101216026 | Anne White | Changes from last shot:
Extend the IC_EF4U by 100 msec, may not be related to disruption, but extend it anyway. Remove the field ramp. Now, reduce Bt early to 4.5 T and hold steady there for entire shot. (i.e. skip the Bt = 2.3 T period before 0.8 sec.) Result: Shot ran, but disrupted near t = 1.48-1.50 sec, before the Ip rampdown next shot: move the RXL and ZXL ramp 100 ms earlier, to see if these shape changes affect the H-mode transition. Transition was occurring at 1.3 sec, now if the lower x point position was instrumental in this, the transition may occur at 1.2 sec or so. |
| Dec 16 2010 03:07:52:260PM | 1101216027 | Anne White | Changes from last shot:
move the RXL and ZXL ramp 100 ms earlier, to see if these shape changes affect the H-mode transition. Transition was occurring at 1.3 sec, now if the lower x point position was instrumental in this, the transition may occur at 1.2 sec or so. Result: Shot ran transition happens at the same time Next shot: removed the Ar puff intentionally in DPCS from PG1 trace |
| Dec 16 2010 03:18:23:520PM | 1101216028 | Anne White | Changes from last shot:
removed the Ar puff intentionally in DPCS from PG1 trace Result: Shot ran Next shot: Program in the TF_CURRENT ramp to get 2.3 to 4.5 T field change at 0.96-1.0 sec this should be same programming as reference shot 1080313018 Put back in the 50 ms Ar puff on PG1 |
| Dec 16 2010 03:26:38:007PM | 1101216029 | Anne White | Changes from last shot:
Program in the TF_CURRENT ramp to get 2.3 to 4.5 T field change at 0.96-1.0 sec this should be same programming as reference shot 1080313018 Put back in the 50 ms Ar puff on PG1 Result: Shot ran, but disrupted at t = 1.0 sec. may have been something falling in. Next Shot: no DPCS changes repeat this shot |
| Dec 16 2010 03:47:15:523PM | 1101216030 | Anne White | Changes from last shot:
no DPCS changes repeat this shot Result: Shot ran got the transitoon near Bt swing at 1 sec Next shot: raise NL04 request to 0.65e20 |
| Dec 16 2010 03:56:54:650PM | 1101216031 | Anne White | Changes from last shot:
raise nl04 request to 0.65e20 result: disrupted around t = 1.4 sec next shot: no DPCS changes repeat |
| Dec 16 2010 04:20:57:643PM | 1101216032 | Anne White | Changes from last shot:
no DPCS changes repeat Result: shot ran, but disrupted at 1.3 sec Next Shot: For Bt swing, set the low Bt value to 3.1 T (-86111 TF_CURRENT). The high Bt is still at 4.5 T (-125000). Also, increase the NL04 request to 0.8e20 |
| Dec 16 2010 04:22:37:217PM | 1101216033 | Anne White | Changes from last shot:
For Bt swing, set the low Bt value to 3.1 T (-86111 TF_CURRENT). The high Bt is still at 4.5 T (-125000). Also, increase the NL04 request to 0.8e20 Result: shot ran, but disrupted early at 0.6 sec Next Shot: no DPCS changes |
| Dec 16 2010 04:27:19:733PM | 1101216034 | Anne White | Changes from last shot:
no DPCS changes Result: shot disrupted early Next shot: reduce density NL04 request to 0.65e20 again |
| Dec 16 2010 04:41:42:040PM | 1101216035 | Anne White | Changes from last shot:
reduce density NL04 request to 0.65e20 again Result: shot ran got a transition around t = 1.2 sec Next shot: increase density to 0.7e20 |
| Dec 16 2010 05:00:39:643PM | 1101216036 | Anne White | Changes from last shot:
increase density to 0.7e20 Result: Shot ran Next shot: |
| Dec 16 2010 05:25:10:467PM | 1101216036 | Anne White | Changes from last shot:
increase density to 0.7e20 Result: Shot ran Shot 36 Last shot of day. Thank you everyone for your help! |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:00:54:817AM | Plasma | Ok | |
| 2 | 09:13:22:030AM | Plasma | Ok | |
| 3 | 09:27:21:707AM | Plasma | Ok | |
| 4 | 09:40:16:117AM | Plasma | Ok | |
| 5 | 09:52:57:660AM | Plasma | Ok | |
| 6 | 10:08:19:277AM | Plasma | Ok | |
| 7 | 10:21:23:257AM | Plasma | Ok | |
| 8 | 10:34:06:853AM | Plasma | Ok | |
| 9 | 10:47:51:137AM | Plasma | Ok | |
| 10 | 11:01:12:403AM | Plasma | Ok | |
| 11 | 11:13:57:030AM | Plasma | Ok | |
| 12 | 11:27:26:690AM | Plasma | Ok | |
| 13 | 11:41:10:260AM | Plasma | Ok | |
| 14 | 11:54:30:620AM | Plasma | Ok | |
| 15 | 12:08:15:810PM | Plasma | Ok | |
| 16 | 12:23:18:167PM | Plasma | Bad | OH 1 self powered |
| 17 | 12:38:24:070PM | Plasma | Ok | |
| 18 | 12:52:12:973PM | Plasma | Ok | |
| 19 | 01:05:01:537PM | Plasma | Ok | |
| 20 | 01:24:47:730PM | Plasma | Ok | |
| 21 | 01:37:29:510PM | Plasma | Ok | |
| 22 | 01:50:23:880PM | Plasma | Ok | |
| 23 | 02:03:03:883PM | Plasma | Ok | |
| 24 | 02:15:46:923PM | Plasma | Ok | |
| 25 | 02:28:26:807PM | Plasma | Ok | |
| 26 | 02:41:13:047PM | Plasma | Ok | |
| 27 | 02:54:47:830PM | Plasma | Ok | |
| 28 | 03:07:26:313PM | Plasma | Ok | |
| 29 | 03:21:17:897PM | Plasma | Ok | |
| 30 | 03:34:06:860PM | Plasma | Ok | |
| 31 | 03:46:40:537PM | Plasma | Ok | |
| 32 | 04:00:02:893PM | Plasma | Ok | |
| 33 | 04:12:36:133PM | Plasma | Ok | |
| 34 | 04:25:08:713PM | Plasma | Ok | |
| 35 | 04:37:39:780PM | Plasma | Ok | |
| 36 | 04:50:05:833PM | Plasma | Ok | |
| 37 | 05:02:24:063PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Dec 16 2010 09:00:33:100AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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