| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Dan Brunner |
| Physics operator(s): | Jim Irby |
| Engineering operator(s): | Andy Pfeiffer,Bill Byford,Ed Fitzgerald |
| Engineering Operator Run Comment |
| MP667 Commissioning of SOL Probes SL Brunner PO Irby |
| Session Leader Plans |
| Entered: May 3 2012 07:54:46:727AM |
| Author: Dan Brunner |
| MP667 Commissioning of SOL Probes
The purpose of this run is to shake down the new ASP Retarding Field Analyzer (RFA). This probe is well accepted for measuring the ion temperature, but is limited in scan depth. The Ion Sensitive Probe (ISP) can scan deep, but is not as accepted for measuring the ion temperature. The RFA will be used to benchmark the ISP where it can. We'll begin with 1120217011 from the previous run with the ISP. Take a shot to ensure proper targeting. Then start pushing the probe in. Cell access may be required between shots to adjust the electronics. Once the RFA is operating properly, we'll begin a density scan; notching up by ~0.2×1020 m-2 per shot. LH has requested a piggy-back, they may fire after the third probe scan is done (1.3 s). |
| Physics Operators Plans |
| Entered: May 2 2012 04:03:08:300PM |
| Author: Jim Irby |
| -----------------
Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1120217011 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 DISABLED 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): no Overnight ECDC (yes/no): yes ICRF(yes/no): yes LH(yes/no): no Cryopump (yes/no): no DNB (yes/no): no Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s |
| Session Leader Summaries |
| Entered: May 3 2012 05:10:48:203PM |
| Author: Dan Brunner |
| Got some good data; demonstrated that the A-port scanning probe retarding field analyzer could operate properly. Will analyze the data in the coming days. Found out that there is an arcing/shorting problem in the scanning RFA that does not exihst in the limiter RFA. Will have to improve insulation. |
| Physics Operator Summaries |
| Entered: May 3 2012 05:04:57:043PM |
| Author: Jim Irby |
| We had two fizzles following a locked mode disruption; not hard to
understand. But we had several more unexplained fizzles during the run. Near the end of the run we began to toggle between plasmas and fizzles. I only tried small prefill gas changes, but ef4 tweaks may have been more helpful. For shot 14 a locked mode shot was loaded (1120502009) into segment 4. I then forgot to turn off seg 2 and turn on seg 4, resulting in a repeat of shot 13. On shot 15 I think I corrected the error, but we still got a repeat of shot 13. PCS did not properly handle the changes. Steve Wolfe suggested we exit PCS and then restart it. When it came back up seg 2 was still on and seg 4 was off. So we toggled them again and verified that the changes were properly indicated in the PCS log and the files. After a runaway shot on shot 16, we finally got the locked mode shot on 17. Only other tweak of note was RCUR change to move the plasma out a few mm to help with LH coupling on shot 10. Seems to have helped. LH worked up to 350 kW or so today, with rc < 20%. plasma 01,02,03,04,05,06,07,08,09,10 11,12,13,14,15,16,17,20,21,22 23,24,25,26,28 fizzle 18,19,23,27,29 |
| Session Leader Comments | |||
| May 3 2012 09:10:57:373AM | 1120503001 | Dan Brunner | Setup: Load 1120217011.
Result: Good target. Next shot: Same. Scan ASP. |
| May 3 2012 09:25:51:027AM | 1120503002 | Dan Brunner | Setup: Load 1120217011.
Result: Good target. Next shot: Same. Cell access to swap Slit and Collector. |
| May 3 2012 09:44:49:450AM | 1120503003 | Dan Brunner | Setup: Repeat previous shot.
Result: Runaway electron shut down. Next shot: Same, hopefully less runaways. |
| May 3 2012 10:02:43:190AM | 1120503004 | Dan Brunner | Setup: Repeat previous shot.
Result: Looks like everything is in order. Current still low, pushing in deeper. Next shot: Repeat. |
| May 3 2012 10:26:01:583AM | 1120503005 | Dan Brunner | Setup: Repeat previous shot.
Result: Looks like everything is in order. Currents good. Next shot: Repeat. |
| May 3 2012 10:40:55:037AM | 1120503006 | Dan Brunner | Setup: Repeat previous shot.
Result: Good plasma. Slit arcing. Next shot: Repeat. Sweep Slit to see where I am in Te-space. |
| May 3 2012 11:15:50:420AM | 1120503007 | Dan Brunner | Setup: Repeat previous shot.
Result: Good plasma. Sweep of Slit on first scan looks good. Other scans arcing, shorting? Next shot: Repeat, increase density by 0.2×1020 m-2 to increase edge density for LH. |
| May 3 2012 11:32:39:433AM | 1120503008 | Dan Brunner | Setup: Repeat previous shot, increase density by 0.2Ã?1020 m-2 to increase edge density for LH.
Result: Good plasma. Slit overcurrent. Next shot: Repeat. Try Ti-mode. |
| May 3 2012 11:52:21:300AM | 1120503009 | Dan Brunner | Setup: Repeat previous shot.
Result: Good plasma. Ti-mode messy. Next shot: Repeat. |
| May 3 2012 12:03:44:350PM | 1120503010 | Dan Brunner | Setup: Repeat previous shot.
Result: Good plasma. Ti-mode decent on third scan. Next shot: Repeat, increasing bias range. |
| May 3 2012 12:25:30:457PM | 1120503011 | Dan Brunner | Setup: Repeat previous shot.
Result: Good plasma. Ti-mode looks good. Next shot: Repeat, adjust bias to measure secondary electron contribution. |
| May 3 2012 12:34:54:870PM | 1120503012 | Dan Brunner | Setup: Repeat previous shot.
Result: Good plasma. Collector shorts. Next shot: Repeat. |
| May 3 2012 12:44:00:397PM | 1120503013 | Dan Brunner | Setup: Repeat previous shot.
Result: Ends too early. Next shot: Locked mode attempt. |
| May 3 2012 01:01:19:910PM | 1120503014 | Dan Brunner | Setup: Try locked mode.
Result: No lock. Next shot: Locked mode attempt. |
| May 3 2012 01:18:53:357PM | 1120503015 | Dan Brunner | Setup: Try locked mode.
Result: No lock. Next shot: Locked mode attempt. |
| May 3 2012 01:28:46:337PM | 1120503016 | Dan Brunner | Setup: Try locked mode.
Result: Runaway electron shutdown. Next shot: Locked mode attempt. |
| May 3 2012 01:44:15:563PM | 1120503017 | Dan Brunner | Setup: Try locked mode.
Result: Locked. Next shot: Go back to shot 12 and push in RFA. |
| May 3 2012 01:56:15:630PM | 1120503018 | Dan Brunner | Setup: Repeat shot 12.
Result: Fizzle. Next shot: Try again. |
| May 3 2012 02:08:07:293PM | 1120503019 | Dan Brunner | Setup: Repeat.
Result: Fizzle. Next shot: Try again. |
| May 3 2012 02:27:49:963PM | 1120503020 | Dan Brunner | Setup: Repeat.
Result: Plasma! First two scans look good. Next shot: Repeat. Push in deeper. |
| May 3 2012 02:58:27:073PM | 1120503021 | Dan Brunner | Setup: Repeat.
Result: First two scans look good. Next shot: Repeat. Push in deeper. |
| May 3 2012 03:09:18:560PM | 1120503022 | Dan Brunner | Setup: Repeat.
Result: First scan looks good. Next shot: Repeat. Push in deeper. |
| May 3 2012 03:21:28:780PM | 1120503023 | Dan Brunner | Setup: Repeat.
Result: Fizzle. Next shot: Repeat. |
| May 3 2012 03:43:53:243PM | 1120503024 | Dan Brunner | Setup: Repeat.
Result: Plasma. Grid 1 shorting. ಠ_ಠNext shot: Repeat. |
| May 3 2012 03:54:59:830PM | 1120503025 | Dan Brunner | Setup: Repeat.
Result: Plasma. Some good data in the last two scans. Next shot: Repeat. |
| May 3 2012 04:10:10:253PM | 1120503026 | Dan Brunner | Setup: Repeat.
Result: Plasma. Decent data. Next shot: Repeat. |
| May 3 2012 04:22:02:283PM | 1120503027 | Dan Brunner | Setup: Repeat.
Result: Fizzle. Next shot: Repeat. |
| May 3 2012 04:40:50:043PM | 1120503028 | Dan Brunner | Setup: Repeat.
Result: Good plasma, strange Grid currents. Next shot: Repeat. |
| May 3 2012 04:49:06:120PM | 1120503029 | Dan Brunner | Setup: Repeat.
Result: Fizzle. Next shot: Repeat. |
| May 3 2012 05:06:41:040PM | 1120503030 | Dan Brunner | Setup: Repeat.
Result: Good plasma. Next shot: Dinner. |
| Physics Operator Comments | |||
| May 3 2012 08:27:19:190AM | Jim Irby | load from 1120217011 --- 800 kA, 5.4T, 4.5e19/m^2 request
load seg 1 from 1120502026 into seg 1 --- good startup from yesterday loaded --- open tree done | |
| May 3 2012 09:10:09:250AM | 1120503001 | Jim Irby | Note that the LH group will be firing into a dummy load --- no rf into plasma
results -------------------------------- plasma into rampdown --- h-mode with icrf at 1.2 s h/(h+d) from 0.15 before to 0.25 after icrf |
| May 3 2012 09:25:50:343AM | 1120503002 | Jim Irby | changes --------------------------------
enable argon from 0.30 to 0.35 s results -------------------------------- plasma into rampdown --- h/(h+d) 0.25 following icrf probe guys to cell.... Steve Wolfe notes that EFC voltages lower today than yesterday with the same settings. |
| May 3 2012 09:48:17:253AM | 1120503003 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- plasma for 0.273 s --- runaways |
| May 3 2012 10:10:19:337AM | 1120503004 | Jim Irby | changes --------------------------------
pg3 seg1 gas increased slightly Otd results -------------------------------- plasma into rampdown |
| May 3 2012 10:20:27:583AM | 1120503005 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- A-Right slowing us down --- approx 17 minutes to init plasma into rampdown --- still have a few x-rays |
| May 3 2012 10:48:44:397AM | 1120503006 | Jim Irby | changes --------------------------------
prepuff from 20 to 22 ms Otd dnb opened briefly to machine for first time: IGT from 3.0 to 4.4e-6 Torr results -------------------------------- plasma into rampdown --- x-rays better |
| May 3 2012 11:01:48:007AM | 1120503007 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- plasma into rampdown |
| May 3 2012 11:28:26:623AM | 1120503008 | Jim Irby | changes --------------------------------
dnb fired into machine following shot 07. IGT to 3.4e-4 Torr briefly density request from 4.5e19/m^2 to 6.5e19/m^2 Otd results -------------------------------- plasma into rampdown ---- |
| May 3 2012 11:36:02:473AM | 1120503009 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- plasma into rampdown |
| May 3 2012 11:58:25:580AM | 1120503010 | Jim Irby | changes --------------------------------
Will attempt to run dnb into plasma for this shot. No LHe in cryopumps, so dnb basepressure is poor (mostly H). RCUR from 0.659 to 0.661 m --- better LH coupling? Otd results -------------------------------- plasma into rampdown got the right gap change at 1.2 s --- LH coupling improved |
| May 3 2012 12:18:30:110PM | 1120503011 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- plasma into rampdown |
| May 3 2012 12:29:11:970PM | 1120503012 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- plasma into rampdown nl_04 available by 2:08 into recool |
| May 3 2012 12:53:30:030PM | 1120503013 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- plasma for 0.15 s, shutdown on x-rays, sdd_x01 briefly at 10 mA |
| May 3 2012 12:59:52:707PM | 1120503014 | Jim Irby | changes --------------------------------
load seg 4 from 1120502009 into seg 4 ---- locked mode shot Ote results -------------------------------- plasma into rampdown forgot to turn off seg 2 and turn on seg 4 ---- so no locked mode |
| May 3 2012 01:26:24:190PM | 1120503015 | Jim Irby | changes --------------------------------
made sure seg 4 was on and seg 2 was off ---- loaded results -------------------------------- still no locked mode discharge ----- Exited PCS and re-entered it. Found that seg 2 was still on and seg 4 was still off. Now Steve Wolfe sees the proper file updates. We also saw seg 4 was enabled in the PCS terminal. Try again... |
| May 3 2012 01:34:45:090PM | 1120503016 | Jim Irby | changes --------------------------------
try again for locked mode shot. results -------------------------------- plasma for 0.5 s --- current ramped down smoothly 4 mA spike on SDD_X01 |
| May 3 2012 01:47:23:170PM | 1120503017 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- good locked mode shot |
| May 3 2012 02:52:44:830PM | 1120503018 | Jim Irby | changes --------------------------------
seg 2 on, seg 4 off Otd PCS terminal indicated seg change occurred PCS terminal verified seg 2 parameters were loaded Steve verified that the PCS files were ok recool time only 10 minutes results -------------------------------- fizzle ---- disruption! |
| May 3 2012 02:16:40:713PM | 1120503019 | Jim Irby | changes --------------------------------
try again results -------------------------------- fizzle --- but almost went |
| May 3 2012 02:33:30:533PM | 1120503020 | Jim Irby | changes --------------------------------
prepuff from 22 to 21 ms Otd results -------------------------------- plasma into rampdown |
| May 3 2012 03:16:00:363PM | 1120503022 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- Plasma into rampdown |
| May 3 2012 03:31:20:400PM | 1120503023 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- fizzle |
| May 3 2012 03:48:46:660PM | 1120503024 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- plasma into rampdown |
| May 3 2012 04:02:29:767PM | 1120503025 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- plasma into rampdown |
| May 3 2012 04:11:44:337PM | 1120503026 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- plasma into rampdown |
| May 3 2012 04:30:54:773PM | 1120503027 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- fizzle --- a little elevated CII |
| May 3 2012 04:44:18:247PM | 1120503028 | Jim Irby | changes --------------------------------
prepuff from 21 to 22 ms Otd results -------------------------------- plasma into rampdown |
| May 3 2012 04:58:27:547PM | 1120503029 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- fizzle |
| May 3 2012 05:02:39:463PM | 1120503030 | Jim Irby | changes --------------------------------
no dpcs changes results -------------------------------- plasma into rampdown |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:56:46:207AM | Plasma | Ok | |
| 2 | 09:15:09:290AM | Plasma | Ok | |
| 3 | 09:40:23:447AM | Plasma | Ok | |
| 4 | 09:54:44:863AM | Plasma | Ok | |
| 5 | 10:14:57:250AM | Plasma | Ok | |
| 6 | 10:33:16:537AM | Plasma | Ok | |
| 7 | 10:54:18:710AM | Plasma | Ok | |
| 8 | 11:14:54:423AM | Plasma | Ok | |
| 9 | 11:33:04:903AM | Plasma | Ok | |
| 10 | 11:50:16:070AM | Plasma | Ok | |
| 11 | 12:07:23:133PM | Plasma | Ok | |
| 12 | 12:23:43:643PM | Plasma | Ok | |
| 13 | 12:40:07:500PM | Plasma | Ok | |
| 14 | 12:54:14:220PM | Plasma | Ok | |
| 15 | 01:07:45:660PM | Plasma | Ok | |
| 16 | 01:24:54:193PM | Plasma | Ok | |
| 17 | 01:38:13:070PM | Plasma | Ok | |
| 18 | 01:51:39:370PM | Plasma | Ok | |
| 19 | 02:05:01:663PM | Plasma | Ok | |
| 20 | 02:19:56:090PM | Plasma | Ok | |
| 21 | 02:41:08:160PM | Plasma | Ok | |
| 22 | 02:59:34:537PM | Plasma | Ok | |
| 23 | 03:17:44:567PM | Plasma | Ok | |
| 24 | 03:33:17:617PM | Plasma | Ok | |
| 25 | 03:46:56:410PM | Plasma | Ok | |
| 26 | 04:02:47:270PM | Plasma | Ok | |
| 27 | 04:17:21:153PM | Plasma | Ok | |
| 28 | 04:30:33:453PM | Plasma | Ok | |
| 29 | 04:45:51:827PM | Plasma | Ok | |
| 30 | 04:59:17:887PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| May 3 2012 08:56:22:717AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| May 3 2012 05:28:27:727PM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Study of digitizer offset / dark current
shot apd-HV 810 1750 811 1700 812 1650 813 1600 814 1800 815 1850 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||