| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Mike Garrett,Peng Xu |
| Physics operator(s): | Steve Wukitch,Ron Parker |
| Engineering operator(s): | Sam Pierson,Bill Parkin,Thomas Toland,Gary Dekow |
| Engineering Operator Run Comment |
| MP 704: observation of current density profile change in LH discharges w |
| Session Leader Plans |
| Entered: Sep 17 2012 02:41:36:307PM |
| Author: Steve Wukitch |
| -------------------
Session Leader Plan ------------------- Part A 1. Begin with 1120904013 for comparison of D/E and J. Dipole and Monopole - 6 shots 2. Neon seeding scan and measure GPI - 6 shots Ne in B-side lower w/ 2 psi (PG1) 200 ms starting at 0.3 s, 100 V 3. Heat load comparison - 2 shots long 2.5 MW discharge one D/E and one J |
| Entered: Sep 17 2012 02:52:05:220PM |
| Author: Peng Xu |
| MP 704: observation of current density profile change in LH discharges with polarimeter system
We will continue running MP 704(partly done on 1120606,1120612) for the second half of the run day(1-5pm). During previous LH runs, the Polarimeter system responded to the current driven by LH with LH power scan, LH pulse window scan, density scan, LH phase scan. Today, we will do shot-to-shot Ip scan while keeping all the other plasma/LH parameters constant. Setup TF field starting from -1.1s,to provide a quiet baseline for polarimetry measurements. ==============Auxiliary Systems======================= LH DNB for MSE Overnight ECDC in D. no Cryopump no ICRF ======Required Diagnositics ============================= Polarimeter, core and edge Thomson Scattering, MSE, ECE, Hard X-ray spectrometer, FTCI, CECE =========Shot plan====================================== a)Bring up LH power for a reference shot:1120912017. setup nl_04~4e19/m^2, Ip~500kA. LH time: 0.9s-1.6s, LH phasing:75deg (2-3 shots) (1) LH=500kW (2) LH=800kW b)With highest achievable LH power(target:700-800kW),scan Ip. (4 good shots) (1) Ip~650kA (2) Ip~800kA (3) Ip~950kA (4) Ip~400kA c)Repeat the Ip scan in b) to check the reproducibility of polarimeter measurements(5 good shots) (1) Ip~400kA (2) Ip~500KA (3) Ip~650KA (4) Ip~800kA (5) Ip~950kA d)Repeat shot 1120912028(LH phase scan) with Ip~800kA (1-2 good shots) e)If we have time left,pick a shot with biggest polarimetry response from Ip scan, and do some shots with different densities. |
| Physics Operators Plans |
| Entered: Sep 17 2012 02:31:01:793PM |
| Author: Steve Wukitch |
| Physics Operator Plan for 18 Sep 2012, 1120918
MP681 - RF sheath rectification in plasmas heated with a field-aligned ICRF antenna MP704 - Observation of current density profile change in LH discharge with polarimeter system SL: M. Garrett/P. Xu PO: S. Wukitch/ R. Parker Critical diagnostics: emissive probes (A-B limiter, ASP, SSS), GPI, and impurity diagnostics for first half day. ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1120904013 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 2 psi Ne Hybrid DISABLED (PG1) leave B-side upper as is (3He) Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill H-bottom with 1 psi Ar Hybrid enabled(PG5) leave B-div as is Hybrid DISABLED (PG6) leave H-div as is Hybrid DISABLED (PG7) fill NINJA F-port with 10 psi D2 DISABLED fill NINJA C-port with 10 psi D2 DISABLED Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, HIREX-Sr, Xeus, LoWEUS Leave z-bolo shutter as is (should be open) Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): yes 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) ------------------------------ ECDC Parameters: gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm ----------- Physop Plan ----------- 1. For break down, import Seg1 from 1120917022 2. Start with 1120904013 Seg 2 Follow SL plan for discharge specifics |
| Session Leader Summaries |
| Entered: Sep 19 2012 03:20:45:893PM |
| Author: Peng Xu |
| Summary for run 1120918014-1120918028(MP 704)
We got overall 15 shots with only 1 early disruption and 14 full plasma. LH worked well as requested, with minor faults for shots 16,27,28. Thanks to good plasma and LH, we sucessfully did a shot-to-shot Ip scan from 400KA to 950kA. We also repeated a LH phase scan shot(ref 1120912028) with a higher Ip~800kA. The LHCD effect is observed by polarimeter, though the signal is noisier than last week.Today's shots should provide an good comparison and complementation for LHCD shots from previous run days. shot list: Bring up the LH power with Ip~500kA, nl_04~4e19(various shot by shot around target),LH phase=75deg 14: Ip~500kA, LH~500kW 15: Ip~500kA, LH~600kW 16: Ip~500kA, LH~700kW Scan Ip while keeping LH~700kW 17: Ip~600kA(no TS density) 18: Ip~600kA 19: IP~800kA 20: early disuption 21: Ip~950kA 22: Ip~400kA 23: Ip~400kA 24: Ip~500kA 25: Ip~650kA 26: Ip~800kA 27: repeat shot 14 with IP~500kA, LH~500kW 28: LH phase scan(115->105->90->75deg) with LH~550kW |
| Physics Operator Summaries |
| Entered: Sep 18 2012 06:08:35:607PM |
| Author: Ron Parker |
| Beginning with shot 14 we switdhed to Peng Xu's part of the run:
MP704 - Observation of current density profile change in LH discharge with polarimeter system 15 shots were run, of which all but one ran without a hitch as programmed. The one outlier disrupted early. for this part of the run, the machine ran well with no problems and no delays. Also, the LH system performed very well, with very few faults during the entire run. |
| Entered: Sep 19 2012 11:36:37:040AM |
| Author: Steve Wukitch |
| Physop Summary from MP681
We had a delay to the start to thaw the TF valves that had frozen overnight. The startup was reliable for the first 13 discharges with 010, 011 having significant bounces that went away without operator action on 012 and 013. We were unable to accomplish the planned experiment because E antenna FFTs arced at 300 kW forward power. However we were able to investigate low Z seeding and the impact of He GPI on RF performance using D and FA-J antenna. score card attempts 13 plasmas 13 |
| Session Leader Comments | |||
| Sep 18 2012 02:24:46:580PM | 1120918014 | Peng Xu | Switch over to running MP704.
Plan:reference shot 1120912017 setup nl_04~4e19,Ip~500kA LH:09-1.6s, 75 phasing, bring up LH power within a couple of shots. TF starts from -1.1s Result:plasma with good density control during LH, 500KW LH power, loop voltage to 0.4V Next: repeat plasma, with 25% more LH power. |
| Sep 18 2012 02:37:33:753PM | 1120918015 | Peng Xu | Plan:repeat shot 14 with higher LH power
Result:good plasma, good LH(600kW), Vloop~0.25v Next:repeat plasma,further increase LH power |
| Sep 18 2012 02:55:24:457PM | 1120918016 | Peng Xu | Result:good plasma, 700kW LH with a trip~1.45s, Vloop~0.2v
Next: Ip~650kA,keep LH power but reduce pulse length to 0.9s-1.55s |
| Sep 18 2012 03:16:06:407PM | 1120918017 | Peng Xu | Plan: Ip~650kA,LH~700kW(0.9-1.55s)
Result:Ip~600kA,good LHCD,no TS density Next: Ip~800kA,no change on LH |
| Sep 18 2012 03:25:10:020PM | 1120918018 | Peng Xu | Plan: Ip~800kA
Result:Ip~600kA(still a good one,as we miss TS for shot 17),good LHCD Next: Ip~800kA,no change on LH |
| Sep 18 2012 03:41:07:823PM | 1120918019 | Peng Xu | Plan: Ip~800kA
Result:Ip~800kA,nl04~3.5e19 flat,Vloop~0.3V Next: Ip~950kA,no change on LH |
| Sep 18 2012 03:57:17:160PM | 1120918020 | Peng Xu | Plan: Ip~950kA
Result:early disruption Next: repeat |
| Sep 18 2012 04:24:07:653PM | 1120918021 | Peng Xu | Plan: Ip~950kA
Result:full plasma,nl04 increases from 3e19 to 4e19 when LH turns on,Vloop~0.4V Next: Ip~400KA |
| Sep 18 2012 04:27:19:773PM | 1120918022 | Peng Xu | Plan: Ip~400kA
Result:full plasma,nl04 drops during LH, Vloop~0V Next: repeat |
| Sep 18 2012 04:40:26:280PM | 1120918023 | Peng Xu | Plan: Ip~400kA
Result:full plasma,nl04 drops during LH, Vloop~0V Next: Ip~500kA |
| Sep 18 2012 05:05:57:567PM | 1120918024 | Peng Xu | Plan: Ip~500kA
Result:full plasma, Vloop~0.3V polar chord#1 shows LH effect from 1s for this shot. Next: Ip~650kA |
| Sep 18 2012 05:12:50:247PM | 1120918025 | Peng Xu | Plan: Ip~650kA
Result:got 650kA with good LHCD,Vloop~0.2V Next: Ip~800kA |
| Sep 18 2012 05:38:57:827PM | 1120918026 | Peng Xu | Plan: Ip~800kA
Result:got 800kA,Vloop~0.3V LH effect on polar chord#1,#2 Next: to diagnose the polar noise,repeat shot 14(Ip=500kA.LH~500kW 0.9s-1.6s ) |
| Sep 18 2012 05:53:53:820PM | 1120918027 | Peng Xu | Plan: repeat shot 14
Result:full Ip with lower nl_04,good LHCD with faults~1.45s, Vloop~0.2V LH effect on polar chord#1,#2 Next: repeat LH phase scan(1120912028) with Ip~800kA |
| Sep 18 2012 06:00:46:803PM | 1120918028 | Peng Xu | Plan: repeat LH phase scan(1120912028) with Ip~800kA
Result:Full plasma. Next: END OF RUN. Thanks everyone!! |
| Physics Operator Comments | |||
| Sep 18 2012 09:11:26:253AM | 1120918001 | Steve Wukitch | delay while thawing TF cooling valves |
| Sep 18 2012 10:42:17:897AM | 1120918001 | Steve Wukitch | 001 loaded from 1120904013
set target density to 7x10^19 ratiomatic is back but not calibrated - need a fizzle Load at 18-Sep-2012 09:02:28.00 demand: BT=5.4 T, Ip=0.8 MA, nl04=7x10^19 result: plasma FA-J ran well in first pulse D was faulting E was still struggling next: repeat with monopole in first FA-J pulse |
| Sep 18 2012 10:56:00:340AM | 1120918002 | Steve Wukitch | 002 demand: BT=5.4 T, Ip=0.8 MA, nl04=7x10^19
result: plasma - gas puff is causing density increase FA-J ran well in first pulse D was faulting E was still struggling next: lower target density at 0.3 turnoff Ar puff Load at 18-Sep-2012 10:53:00.00 |
| Sep 18 2012 11:16:24:630AM | 1120918003 | Steve Wukitch | 003 demand: BT=5.4 T, Ip=0.8 MA, nl04=7x10^19
result: plasma - gas puff is causing density increase FA-J ran well in monopole D was clean E - FFT faulting - likely leaking water internally next: move S3 out - blocking Chromex FA-J view ASP is disabled due to control issue repeat with S3 |
| Sep 18 2012 11:29:14:817AM | 1120918004 | Steve Wukitch | 004 demand: BT=5.4 T, Ip=0.8 MA, nl04=7x10^19
result: plasma - early disruption ~0.65 s Mo injection next: ASP is enabled |
| Sep 18 2012 11:49:31:020AM | 1120918005 | Steve Wukitch | 005 demand: BT=5.4 T, Ip=0.8 MA, nl04=7x10^19
result: plasma good for FA-J monopole and D comparison next: dipole |
| Sep 18 2012 12:08:30:840PM | 1120918006 | Steve Wukitch | 006 demand: BT=5.4 T, Ip=0.8 MA, nl04=7x10^19
result: plasma good for FA-J dipole and D comparison next: repeat - hopefully without Mo injection |
| Sep 18 2012 12:53:41:957PM | 1120918008 | Steve Wukitch | 008 demand: BT=5.4 T, Ip=0.8 MA, nl04=7x10^19
Neon starting 0.3 s, 200 ms, 100 V result: plasma - disrupted in rampdown (likely due to Ne) Mo XXXII went up roughly doubling next: lower Ne voltage to 50 V Load at 18-Sep-2012 12:50:37.00 |
| Sep 18 2012 01:05:50:457PM | 1120918009 | Steve Wukitch | 009 demand: BT=5.4 T, Ip=0.8 MA, nl04=7x10^19
Neon starting 0.3 s, 200 ms, 50 V result: plasma Mo XXXII is unchanged next: repeat - no GPI |
| Sep 18 2012 01:43:29:847PM | 1120918010 | Steve Wukitch | 010 demand: BT=5.4 T, Ip=0.8 MA, nl04=7x10^19
Neon starting 0.3 s, 200 ms, 50 V No GPI (He puff) result: plasma Mo XXXII is higher for D but not FA-J GPI He puff is seeding and improving D more than FA-J next: repeat - disable Ne (B-side lower - PG1) |
| Sep 18 2012 01:43:39:383PM | 1120918011 | Steve Wukitch | 011 demand: BT=5.4 T, Ip=0.8 MA, nl04=7x10^19
Neon disabled No GPI (He puff) result: plasma Mo XXXII is unchanged next: repeat - enable Ne (B-side lower - PG1) Neon starting 0.3 s, 200 ms, 100 V Load at 18-Sep-2012 13:39:50.00 |
| Sep 18 2012 02:00:24:477PM | 1120918012 | Steve Wukitch | 012 demand: BT=5.4 T, Ip=0.8 MA, nl04=7x10^19
Neon starting 0.3 s, 200 ms, 100 V No GPI (He puff) result: plasma Mo XXXII is higher next: repeat - with GPI |
| Sep 18 2012 02:09:29:347PM | 1120918013 | Ron Parker | We are now switching over to Part B of the run, MP704.
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| Sep 18 2012 02:25:03:437PM | 1120918013 | Steve Wukitch | 013 demand: BT=5.4 T, Ip=0.8 MA, nl04=7x10^19
No Neon GPI small puff (He) result: plasma next: switch to second MP |
| Sep 18 2012 02:37:32:640PM | 1120918014 | Ron Parker | Shot 14 ran full length |
| Sep 18 2012 02:37:11:450PM | 1120918015 | Ron Parker | Shot 15 ran full length
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| Sep 18 2012 03:03:45:140PM | 1120918016 | Ron Parker | Shot 16 looked good.
Next: 600 kA |
| Sep 18 2012 03:10:04:667PM | 1120918017 | Ron Parker | Shot ran full length.
Good shot. Next: 800 kA |
| Sep 18 2012 03:27:26:207PM | 1120918018 | Ron Parker | We actually repeated 600 kA on that shot, since TS didn't work on previous 600 kA shot (Well, actually PO didn't load it, sorry)
Shot ran well, nice LHCD Next: 800 kA (really) |
| Sep 18 2012 03:38:41:267PM | 1120918019 | Ron Parker | Good shot, full length |
| Sep 18 2012 03:44:04:560PM | 1120918019 | Ron Parker | Good shot, 800 kA. LH, ave density flat, with both central T and central n increasing.
Next: 950 kA |
| Sep 18 2012 03:56:57:350PM | 1120918020 | Ron Parker | Disrupted |
| Sep 18 2012 04:12:45:697PM | 1120918021 | Ron Parker | Shot ran full length at 950 kA
Next: 400 kA |
| Sep 18 2012 04:29:54:883PM | 1120918022 | Ron Parker | Essentially full current drive, but an unusual shot at 400 kA
Full length |
| Sep 18 2012 04:43:27:073PM | 1120918023 | Ron Parker | Shot ran full length
Essentially zero loop voltage at 400 kA Next: 500 kA |
| Sep 18 2012 04:57:59:093PM | 1120918024 | Ron Parker | Shot 24 ran essentially full length
Next: 650 kA |
| Sep 18 2012 05:15:49:273PM | 1120918025 | Ron Parker | Shot 25 ran well, full length
Next: 800 kA |
| Sep 18 2012 05:38:54:580PM | 1120918026 | Ron Parker | Shot 26 ran well, full length. T_e(0) ~ 4.5 keV
Next: repeat shot 14 |
| Sep 18 2012 05:53:48:467PM | 1120918027 | Ron Parker | Shot 27 ran full length, one LH trip
Next: Reproduce shot 1120912028, but at 800 kA |
| Sep 18 2012 06:05:28:420PM | 1120918028 | Ron Parker | Shot 28 ran as programmed with a nice phase scan. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 10:28:06:330AM | Plasma | Ok | |
| 2 | 10:41:52:597AM | Plasma | Ok | |
| 3 | 10:59:37:000AM | Plasma | Ok | |
| 4 | 11:19:53:570AM | Plasma | Ok | |
| 5 | 11:37:34:827AM | Plasma | Ok | |
| 6 | 11:52:37:203AM | Plasma | Ok | |
| 7 | 12:12:02:280PM | Plasma | Ok | |
| 8 | 12:40:41:677PM | Plasma | Ok | |
| 9 | 12:53:22:290PM | Plasma | Ok | |
| 10 | 01:05:58:613PM | Plasma | Ok | |
| 11 | 01:29:44:663PM | Plasma | Ok | |
| 12 | 01:42:59:993PM | Plasma | Ok | |
| 13 | 01:59:18:797PM | Plasma | Ok | |
| 14 | 02:16:04:540PM | Plasma | Ok | |
| 15 | 02:31:22:093PM | Plasma | Ok | |
| 16 | 02:47:46:157PM | Plasma | Ok | |
| 17 | 03:03:36:873PM | Plasma | Ok | |
| 18 | 03:18:59:383PM | Plasma | Ok | |
| 19 | 03:34:24:203PM | Plasma | Ok | |
| 20 | 03:51:45:757PM | Plasma | Ok | |
| 21 | 04:06:27:917PM | Plasma | Ok | |
| 22 | 04:20:37:580PM | Plasma | Ok | |
| 23 | 04:35:51:413PM | Plasma | Ok | |
| 24 | 04:52:16:390PM | Plasma | Ok | |
| 25 | 05:08:31:013PM | Plasma | Ok | |
| 26 | 05:25:43:873PM | Plasma | Ok | |
| 27 | 05:41:14:603PM | Plasma | Ok | |
| 28 | 05:57:26:850PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sep 18 2012 10:27:47:083AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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