| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Greg Wallace,Bob Mumgaard |
| Physics operator(s): | Robert Granetz |
| Engineering operator(s): | Sam Pierson,Thomas Toland,Gary Dekow |
| Engineering Operator Run Comment |
| MP605 (am) - LH conditioning, MP693 (pm) - Validating inter-shot calibra |
| Session Leader Plans |
| Entered: May 15 2012 04:42:47:963PM |
| Author: Greg Wallace |
| Session leader plan for 1120516:
Starting shot: 1120514013 LH Setup: 50-150 kW/klystron. 90 deg phasing (60, 120 if time allows). 0.5-1.0 s pulse length. LH launcher 0.2 mm behind limiter. 1) Establish operation at 50 kW/klystron, 40 kV, 0.5 s pulse length. 2) Increase power to maximum available at 40 kV (~80 kW/klystron). 3) Increase pulse length to 0.75 s. Check for proper operation of COTS. 4) Increase pulse length to 1.0 s. Remain at this power level until density stays flat during LH. 5) Repeat 2-4 at 50 kV, 100 kW/klystron. 6) Repeat 2-4 at increased power as time allows. |
| Entered: May 15 2012 06:55:50:600PM |
| Author: Bob Mumgaard |
| Run plan for MP693 (05/16/2012)
'Validating the inter-shot calibration technique for MSE diagnostics' Parts d and e. Part f will be run at a later date with swapped filters. ================================================== Purpose: Overall this MP is to validate the new inter-shot calibration (ISC) technique and hardware. Specifically today we'll be running parts e and d (in that order) of the MP. This involves (e) a plasma size ramp and two plasma current scans at two different sizes and (d) a set of 6 field only shots. This will obtain the polarization-pitch angle offset (e, size scan) for the outer MSE channels and the polarization-pitch angle dependence (e, current scan) for a few channels. We will also obtain the Faraday rotation in the optics (d). ********************************************* ********************************************* Machine Operation Parameters: ECDC: D2 the night before Gas: D2 Bt: 5.4T ICRF: no Cryopump: no LH: no for part e: Size scan: Ip: 0.7 - 0.2 current scan: Ip: 0.9-0.3 (full size), 0.6-0.25 (small size) ********************************************** ********************************************** Diagnostics Requirement: TCI, ECE, TS, DNB, MSE ********************************************** ********************************************** Shot Sequence (9~12 shots): Part e, size scan. (1 shot nominally, likely 2) Load target shot from 1101207007, modify to bring magnetics up to date. DNB timing should be at 60-40 on/off starting at 0.4s for all of part e. We'll be running MSE analysis between shots and the ISC system will actuate immediately after shots. We'll need to make sure the MSE data looks good and the ISC system hit its target positions on each shot before moving on. If both conditions are not met we'll need to repeat. Part e, current scan at two sizes (2 shots nominally, likely 4) Load new shot at full size with a current scan from 0.9MA-0.3MA. Density 0.7e20 nel04. Any recent full size shot can be modified. 1 shot with MSE and ISC operating correctly. Load new shot with R=0.625 and a=0.185 with a current scan from 0.6-0.25MA. Density 0.7e20 nel04. 1 shot with MSE and ISC operating correctly. Then we'll move on to part d, tests for Faraday rotation. These are no TF, no DNB, just EF shots, no EF2. MSE ISC will not operate after shots. Cell access to position MSE ISC system at WGP pos B,. (make sure 5th LED lit, position locked). The EF coils will come on and stay on and then turn off. 1 shot: EF3 at 10.0, EF4 at 4.6 1 shot: EF3 at 10.0, EF4 at -4.6 1 shot: EF3 at 10.0, EF4 at 2.0 1 shot: EF3 at 10.0, EF4 at -0.5 Then enter cell and move MSE ISC to postion C 1 shot: EF3 at 10.0, EF4 at 4.6 1 shot: EF3 at 10.0, EF4 at -4.6 If time permits: 1 shot: EF3 at 10.0, EF4 at 2.0 1 shot: EF3 at 10.0, EF4 at -0.5 If there is remaining time we would repeat the current scan at full size to check repeatability and then do a current scan at an intermediate size. |
| Physics Operators Plans |
| Entered: May 15 2012 05:09:46:523PM |
| Author: Robert Granetz |
Engineering setup for Wednesday 2012/05/16
MP605 (am) - LH conditioning
MP693 (pm) - Validating inter-shot calibration technique for MSE diagnostics
Session leaders: G. Wallace (am)
R. Mumgaard (pm)
Physics operator: R. Granetz
Overnight: normal ECDC in D2 and 60 C bake.
Run will start at 09:00 and end at 17:00
Power systems as on: 1120514013 (0.8 MA, 5.4 T, 0.4e20 m-2, LSN)
A-coil configuration: +Dtop -Dbot -Jtop +Jbot; Hybrid enabled (standard
configuration)
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 H-bottom with 15 psi D2 Hybrid DISABLED (PG5)
leave B-div as is Hybrid DISABLED (PG6)
leave H-div as is Hybrid DISABLED (PG7)
leave NINJA as is DISABLED
Enable the following gate valves and shutters, assuming no vacuum problems:
ECE, VUV, Z-bolo, HIREX-Sr, B-spectrometer GV, Xeus, LoWEUS
Torvac setup: keep gate valves open during pulse
Specific diagnostics: DNB, MSE, hard x-ray camera
Desirable diagnostics:
------------------------------------------------------------------------------
Boronization: no
Overnight ECDC: yes, D2
Impurity injector: no
ICRF: no
LH: yes
DNB: yes
Cryopump: no
------------------------------------------------------------------------------
Run plan:
a.m. Vanilla plasma operation; See Greg's logbook entry for
details regarding the LH operation
p.m. Some beam-into-gas with fields; some ohmic plasmas, including an
outer gap scan to sweep the plasma edge across the MSE channels
|
| Session Leader Summaries |
| Entered: May 16 2012 07:38:18:147PM |
| Author: Bob Mumgaard |
| MSE run went well.
Run was handed over at 1:00pm and we broke for an hour to reinstall the source in the beam. (which showed no signs of damage) We switched up the run plan to do part d (Faraday rotation) first, giving the beam time to condition up. First set of shots was for the MSE Faraday rotation calibration. At WGP pos B. 13 condition A (large Bvert invessel, small Brad external) 14 condition B (small Bvert invessel, large Brad external) 15 condition C (intermediate) 16 condition D (intermediate) At WGP pos C. 17 condition A (large Bvert invessel, small Brad external) 18 condition B (small Bvert invessel, large Brad external) Quick overplotting shows the MSE signals make sense and are within 50% of what we expect given the published Verdet constants. Changing the WGP angle shows the Verdet rotation is a pure addition. The invessel lens takes longer to responds as we would expect and has a channel dependence, the external lenses have little to no channel dependence. The data also so a several tenths drift between the shots, presumably due to the birefringence in the vacuum window. Next we moved on to the calibration of MSE with plasmas. First shot was 19 which was a plasma ramp with no beam. MSE ISC operated fine. Next we did a repeat (20) with beam, everything worked well. Moved on to a current scan at near full size (21) but MSE ISC didn't hit ISC WGP D. Repeat (22) and everything worked well. Moved on to current scan at small size (after 5:00pm) went vertically unstable early. Beam and MSE ISC still went. (not that it was any consolation). These three discharges (20,22,23 w/ edits) represent a set of MSE calibration discharges for future use. |
| Physics Operator Summaries |
| Entered: May 17 2012 12:10:55:867AM |
| Author: Robert Granetz |
Run summary for Wednesday 2012/05/16
MP605 (am) - LH commissioning
MP693 (pm) - Validating inter-shot calibration technique for MSE diagnostics
Session leaders: G. Wallace (am)
R. Mumgaard (pm)
Physics operator: R. Granetz
The first half of the day we ran vanilla plasmas, but at very low density
for the LH. Many shots had large amounts of hard x-rays early in the shot
(i.e. even before the LH turned on), with relativistic radiation observed
on a number of shots, and several shots were terminated early by the
control system because of excessive hard x-rays. We tried a number of
things during startup to reduce this, and the most effective was simply
raising the PG4 pre-fill by more than a factor of 2 (to 40 ms). By shot
12, the early hard x-rays were nearly gone. The LH operated pretty cleanly
at powers up to 350 kW.
We then switched to Bob Mumgaard's run. Shots 13-18 were no-plasma shots
with just EF3 and EF4 energized under DPCS control. Shots 19 & 20 scanned
the outer edge of the plasma past a number of MSE channels while
simultaneously ramping down Ip to keep q95 constant. The DNB was firing
into plasmas for the MSE, starting with shot 20. Shots 21 & 22 were also
Ip ramps, but fixed plasma position. Shot 23 was an attempt at a small
plasma on the inboard wall, but it disrupted early due to vertical
instability. We'll need to try this shot again the next time we run this
MP.
No fizzles, duds, or computer problems today!
Scorecard: 17 plasmas
0 duds
0 fizzles
6 no-plasma shots w/EF3 & EF4 for MSE Faraday calibrations
0 power supply tests
0 no-power MDSplus cycle tests
0 no-power gas test
--------------
Total: 23 shot cycles
|
| Session Leader Comments | |||
| May 16 2012 09:43:43:227AM | 1120516001 | Greg Wallace | Clean LH pulse at 40 kW/klystron, 90 deg phasing. 175 kW net power. Next shot increase to 60 kW/klystron. |
| May 16 2012 09:58:58:520AM | 1120516002 | Greg Wallace | Another clean LH pulse. Looks like a hot spot on inner wall tile during rampup and rampdown. LH looks good, though. Not much density rise during LH. Increase to 80 kW/klystron. |
| May 16 2012 10:10:38:483AM | 1120516003 | Greg Wallace | Early shutdown due to runaways. Glowing on midplane tiles of LH limiter but launcher looks OK. |
| May 16 2012 10:29:12:190AM | 1120516004 | Greg Wallace | Clean LH pulse. Reflection coefficient rises a bit towards the end of the pulse. Next shot will remain at 80 kW/klystron, 90 deg phasing with increase to 0.75 s pulse length. |
| May 16 2012 10:49:18:277AM | 1120516005 | Greg Wallace | Runaway shutdown. |
| May 16 2012 11:48:56:750AM | 1120516006 | Greg Wallace | Another runaway shutdown. |
| May 16 2012 12:02:36:527PM | 1120516007 | Greg Wallace | Runaway shutdown. |
| May 16 2012 12:28:12:407PM | 1120516008 | Greg Wallace | 80 kW/klystron, 40kV. Clean LH pulse at 350 kW, 750 ms. Some funny behavior towards the end of the pulse. Drop in LH probe density causes increase in reflections, but no clear cause. Will try again at this pulse length to see if it happens again. |
| May 16 2012 12:37:10:443PM | 1120516009 | Greg Wallace | Another clean LH pulse at 80 kW/klystron, 40 kV, 750 ms. Similar increase in refco late in the pulse as on shot 8. Next shot will move LH pulse earlier (0.6-1.35 s). |
| May 16 2012 12:46:38:773PM | 1120516010 | Greg Wallace | Another clean LH pulse at 40 kV, 80 kW/klystron, 750 ms. Still some increase in noise on reflection coefficient towards end of the pulse, but less than before. Next shot will move LH pulse to 0.5-1.4 s.
Early runaway problem seems to be fixed? |
| May 16 2012 01:07:11:427PM | 1120516011 | Greg Wallace | Good shot at 900 ms! Next shot will repeat at the same timing to see if the density rise during LH continues. |
| May 16 2012 01:15:26:397PM | 1120516012 | Greg Wallace | Another good shot at 900 ms. LH ran clean. Increase in refco noise after 1.3 s. Turning run over to Bobby Mums. |
| May 16 2012 02:28:20:403PM | 1120516013 | Bob Mumgaard | This will be part d, shot A from MP693.
EF3 at 10, EF4 at 4.6 Went. Data came in, looks polarized. Wait for analysis. |
| May 16 2012 03:02:17:230PM | 1120516014 | Bob Mumgaard | This will be part d, shot B from MP693.
EF3 at 10, EF4 at -4.6 Went. Data came in okay. |
| May 16 2012 03:14:38:170PM | 1120516015 | Bob Mumgaard | This will be part d, shot C from MP693.
EF3 at 10, EF4 at 2.0 Data came in. Looks good. |
| May 16 2012 03:31:38:170PM | 1120516016 | Bob Mumgaard | This will be part d, shot D from MP693.
EF3 at 10, EF4 at -0.5 Data looks good. Turned off the LED for the position channel. Went into the cell and moved to position WGP C and locked it down. Turned the LED back on. Ready for a repeat of A and B at this other angle. |
| May 16 2012 03:45:24:647PM | 1120516017 | Bob Mumgaard | This will be part d, shot A from MP693 repeat.
Went. Data looks good. |
| May 16 2012 04:24:11:957PM | 1120516018 | Bob Mumgaard | This will be part d, shot B from MP693 repeat.
Went. Data looks good. |
| May 16 2012 04:25:54:480PM | 1120516019 | Bob Mumgaard | Now we start the plasma calibration of MSE. We'll start with plasma sweeps. First part e.
I went into the cell and unfixed the push pulls. I then turned the tree back to 11.5s ISC shots. I tested the ISC system on shots 805, 806. Looks good. Triggered well. Shot 19 is a plasma sweep with no beam. ISC went afterwards just fine. Shot looks good. |
| May 16 2012 05:29:25:193PM | 1120516020 | Bob Mumgaard | Looks good.
Beam went. ISC went okay. Data collected. Next shot is a current scan at full size. |
| May 16 2012 05:16:16:813PM | 1120516021 | Bob Mumgaard | Looks good.
Beam went. ISC went but didn't hit the last stop. Other than that it was good. Repeat with a reset ISC. |
| May 16 2012 05:16:58:670PM | 1120516022 | Bob Mumgaard | Looks good.
Beam went. ISC went. Good shot. Move on to small size current scan. |
| May 16 2012 05:17:18:963PM | 1120516023 | Bob Mumgaard | Plasma went vertically unstable.
End of run. |
| Physics Operator Comments | |||
| May 16 2012 09:04:10:043AM | Robert Granetz | In preparation for Bob Mumgaard's run during the 2nd half of today, I've preloaded one of the shots he requested (from 1101207007, seg 2) into segment 3. This is the shot that scans the outer gap (actually scans the outer edge location across the MSE channels) while also keeping q constant by ramping down Ip at the same time. I have re""call""ed all the Bp- and flux-based estimators as well, so it's ready to go. | |
| May 16 2012 09:48:59:013AM | 1120516001 | Robert Granetz |
Shot 01 -- Plasma, good shot, full length. 0.8 MA, 5.4 T, 0.4e20 m-2, LSN
P_LH = 0.17 MW. Lots of hard x-ray before and during LH.
Next shot: no DPCS changes; enable B-side-lower valve (Ar, 70 ms)
|
| May 16 2012 10:06:04:873AM | 1120516002 | Robert Granetz |
Shot 02 -- Plasma, good shot, full length. 0.8 MA, 5.4 T, 0.4e20 m-2, LSN
P_LH = 0.26 MW. Lots of hard x-rays before and during LH.
Relativistic emission.
Next shot: tweak early & late nl_04 programming, and increase nl_04 gain to try
keeping density a bit higher early & late
|
| May 16 2012 10:14:54:210AM | 1120516003 | Robert Granetz | Shot 03 -- Plasma, short pulse because it was shutdown early due to lots of runaways. Next shot: increase pre-fill pulse by 3 ms |
| May 16 2012 10:44:46:797AM | 1120516004 | Robert Granetz |
Shot 04 -- Plasma, full length. 0.8 MA, 5.4 T, 0.4e20 m-2, LSN, P_LH = 0.35 MW
Lots of relativistic emission. Since the first shot there's been a
glowing/exploding spot on the midplane of the inboard wall at F-port.
Next shot: no DPCS changes
|
| May 16 2012 11:44:28:370AM | 1120516005 | Robert Granetz | Shot 05 -- Plasma, but shut down early due to runaways. Next shot: add +10 A to IC_EF4; start pre-preprogrammed PG3 puff 2 ms earlier |
| May 16 2012 11:56:23:120AM | 1120516006 | Robert Granetz |
Shot 06 -- Plasma, but shut down early by DPCS due to hard x-rays.
Next shot: increase pre-fill by 6 ms; increase duration of PG3 pre-programmed
pulse by 12 ms
|
| May 16 2012 12:06:22:330PM | 1120516007 | Robert Granetz | Shot 07 -- Plasma, but again terminated early by DPCS due to hard x-rays Next shot: increase pre-fill another 5 ms |
| May 16 2012 12:22:08:720PM | 1120516008 | Robert Granetz |
Shot 08 -- Plasma, full length, but still lots of early hard x-rays. 0.8 MA, 5.4 T, 0.4e20 m-2, LSN
P_LH = 0.35 MW
Next shot: increase pre-fill another 5 ms (to 40 ms); also extend PG3 pre-programmed
pulse out to 100 ms at 50 volts
|
| May 16 2012 12:37:04:033PM | 1120516009 | Robert Granetz |
Shot 09 -- Plasma, full length, and somewhat less early hard x-rays. 0.8 MA, 5.4 T, 0.4e20 m-2, LSN
P_LH = 0.35 MW
Next shot: increase PG3 pre-programmed voltage to 70 (goes to t=0.100 s); increase nl_04 during first
0.3 s of shot; increase nl_04 gain to 9
|
| May 16 2012 12:46:49:453PM | 1120516010 | Robert Granetz |
Shot 10 -- Plasma, full length, good shot, almost no hard x-rays prior to LH.
0.8 MA, 5.4 T, 0.4e20 m-2, LSN, P_LH = 0.35 MW
Next shot: no DPCS changes
|
| May 16 2012 01:03:08:963PM | 1120516011 | Robert Granetz |
Shot 11 -- Plasma, full length, good shot, some hard x-rays prior to LH.
0.8 MA, 5.4 T, 0.4e20 m-2, LSN, P_LH = 0.37 MW
Next shot: no DPCS changes
|
| May 16 2012 01:14:30:720PM | 1120516012 | Robert Granetz |
Shot 12 -- Plasma, full length, good shot, not much hard x-rays prior to LH.
0.8 MA, 5.4 T, 0.4e20 m-2, LSN, P_LH = 0.37 MW
Extended cell access after this shot for DNB repair attempt.
Then switch to Bob Mumgaard's fields-only shots
|
| May 16 2012 02:03:06:323PM | 1120516012 | Robert Granetz | Setting up to do some EF3 & EF4 only shots for MSE polarization calibration. |
| May 16 2012 02:25:47:220PM | 1120516013 | Robert Granetz |
Shot 13 -- EF3: 10 kA (9.9 kA)
EF4: 4.6 kA (4.45 kA in EF4L)
|
| May 16 2012 02:56:27:937PM | 1120516014 | Robert Granetz |
Shot 14 -- EF3: 10 kA (9.9 kA)
EF4: -4.6 kA (-4.49 kA in EF4L)
|
| May 16 2012 03:11:07:797PM | 1120516015 | Robert Granetz |
Shot 15 -- EF3: 10 kA (9.9 kA in EF3U)
EF4: 2.0 kA (1.9 kA in EF4L)
|
| May 16 2012 03:22:20:507PM | 1120516016 | Robert Granetz |
Shot 16 -- EF3: 10 kA (9.9 kA in EF3U)
EF4: -0.5 kA (-0.51 kA in EF4L)
|
| May 16 2012 03:42:54:787PM | 1120516017 | Robert Granetz |
Shot 17 -- EF3: 10 kA (9.9 kA in EF3U)
EF4: 4.6 kA (4.45 kA in EF4L)
|
| May 16 2012 03:54:26:813PM | 1120516018 | Robert Granetz |
Shot 18 -- EF3: 10 kA (9.9 kA in EF3U)
EF4: -4.6 kA (-4.49 kA in EF4L)
|
| May 16 2012 04:09:36:440PM | 1120516019 | Robert Granetz | Now back to plasma operation, loading from 1101207007 (sweep outer edge past MSE channels, and ramp Ip to keep q95 constant during the sweep). All Bp and flux-based predictors have been re""call""ed. |
| May 16 2012 04:24:12:187PM | 1120516019 | Robert Granetz |
Shot 19 -- Plasma, good shot. Scanned outer edge past many MSE channels, and ramped Ip down
to keep q95 nearly constant. Disrupted late in shot because OH2L hit its PLC limit.
Next shot: repeat; increase both OH2 limits to 30 kA
|
| May 16 2012 04:37:02:117PM | 1120516020 | Robert Granetz |
Shot 20 -- Plasma, good shot. Scanned outer edge past many MSE channels, and ramped Ip down
to keep q95 nearly constant. Disrupted late in shot because OH2L hit its PLC limit.
This time we had the DNB firing into plasma.
Next shot: switch to an Ip ramp in a standard plasma with fixed position.
|
| May 16 2012 04:52:15:977PM | 1120516021 | Robert Granetz |
Shot 21 -- Plasma, good shot. Ip ramped down from 0.9 MA to 0.3 MA. DNB fired into plasma.
MSE ISC system didn't go. Need to repeat.
Next shot: repeat, no changes
|
| May 16 2012 05:01:09:327PM | 1120516022 | Robert Granetz | Shot 22 -- Plasma, good shot. Ip ramped from 0.9 to 0.3 MA. DNB worked. MSE worked. Next shot: set up small-size limiter plasma with Ip ramp from -0.6 to 0.25 MA |
| May 16 2012 05:27:39:280PM | 1120516023 | Robert Granetz | Shot 23 -- Plasma, but disrupted very early due to vertical instability. End of run |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:38:08:050AM | Plasma | Ok | |
| 2 | 09:51:37:020AM | Plasma | Ok | |
| 3 | 10:05:46:187AM | Plasma | Ok | |
| 4 | 10:22:25:463AM | Plasma | Ok | |
| 5 | 10:46:34:930AM | Plasma | Ok | |
| 6 | 11:46:09:277AM | Plasma | Ok | |
| 7 | 11:59:23:620AM | Plasma | Ok | |
| 8 | 12:12:28:020PM | Plasma | Ok | |
| 9 | 12:25:52:920PM | Plasma | Ok | |
| 10 | 12:40:04:027PM | Plasma | Ok | |
| 11 | 12:56:17:523PM | Plasma | Ok | |
| 12 | 01:09:55:683PM | Plasma | Ok | |
| 13 | 02:19:29:030PM | Plasma | Ok | |
| 14 | 02:52:46:827PM | Test | Ok | MSE Tests |
| 15 | 03:06:05:347PM | Test | Ok | |
| 16 | 03:19:18:953PM | Test | Ok | |
| 17 | 03:37:45:377PM | Test | Ok | |
| 18 | 03:50:45:347PM | Test | Ok | |
| 19 | 04:12:57:707PM | Plasma | Ok | |
| 20 | 04:28:47:407PM | Plasma | Ok | |
| 21 | 04:43:57:517PM | Plasma | Ok | |
| 22 | 04:57:15:877PM | Plasma | Ok | |
| 23 | 05:13:06:720PM | Plasma | Ok | |
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