| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Catherine Fiore,John Rice |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Bill Cochran,Sam Pierson |
| Engineering Operator Run Comment |
| automatically entered by signon - please replace with real comment |
| Session Leader Plans |
| Entered: Jan 4 2011 10:47:39:737AM |
| Author: Catherine Fiore |
| Purpose
MP#477 Formation of Ohmic H-Mode ITB with Improved Diagnostic Set The purpose of this experiment is to study the conditions which lead to the spontaneous formation of Ohmic H-mode ITBs with an extended diagnostic set. Shot plan Set up the Ohmic H-mode target shots with an ITB using a field ramp which starts at 5.4 T, decreases to 3.2 T, then increases to 4.6 T. Confirm that an ITB forms. Reference shot is 1070628017 Use caution on the Argon initially until an ITB is established. (20 ms to start?) Establish an ITB. We may need to adjust the strike point on the divertor to achieve this. Then proceed to acquire profile data on reproducible shots. Auxiliary Systems: DNB at 50 kV and 6 A. ICRF: 600 kW may be requested after the run begins Diagnostics: Hirex for Ti profiles and rotation Thomson Scattering CXRS Visible Bremsstrahlung Array PCI Reflectometry GPC 1 and 2 Neutron diagnostics MSE Bolometry |
| Entered: Jan 4 2011 02:42:02:977PM |
| Author: John Rice |
| begin MP 632, q dependence of rotation reversal density need cryopump Ar puff (150 ms, B side lower) 1st shot, locked mode 1101124004 2nd shot, 1100325023 shape, 5.0 T, 0.75 MA, density ramp from 0.5 to 0.9 10^20/m^3 3rd shot, repeat with density ramp down, 0.8 to 0.6 10^20/m^3 continue to follow run plan as far as possible |
| Physics Operators Plans |
| Entered: Jan 4 2011 12:02:02:290PM |
| Author: Steve Wolfe |
| Physics Operator plan and Engineering Setup for
Wednesday, Jan 5, 2011 Morning: MP#477 "Formation of ohmic H-mode ITB..." SL: Fiore Afternoon: Either continuation of MP#477 OR MP#632 "Rotation Reversal" SL: Rice PO: wolfe ----------------- Engineering Setup ----------------- Overnight ECDC requested gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s Run begins at 09:00 and ends at 17:00 Power systems as on: 1070628017 ** Except ** Fizzle detector gate from 0.08 to 2.1sec TF Invert time to 3.0sec OH1, OH2U, OH2L invert times to 2.3sec 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 Check with Reinke before enabling Xeus 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 (Put in standby, may be requested during the run) LH(yes/no): no Cryopump (yes/no): Required for afternoon (if we run MP#632). Set up before run, but do not cool to helium until requested DNB (yes/no): YES Vessel temperature: 45/45/45 Physics Operator Plan: ---------------------- Load from 1110104003 (for startup) Import seg2 from ITB reference shot 1070628017 and recalculate mag predictors Import seg3 from seg2 of 1100325023 (for MP#632); change TF to 139kA (5.0T), Ip to 0.75MA, density ramp up from nl04 0.3 to 0.525e20 (nebar from .5 to .9e20/m^3) Import seg4 from seg4 of 1101124004 (locked mode shot) For MP#477, turn on seg2 and tweak whatever seems reasonable to get an ITB (see SL_PLAN). If successful, turn up argon sufficient to get hirex data, document profiles with all available diagnostics. Continue to follow SL_PLAN until done. For MP#632, if we turn to it, turn on cryopump, increase pg4 in seg1 for cryopump startup, turn off seg2, turn on seg4 (locked mode calibration) Then turn on seg3 and proceed through SL_PLAN as in MP#632 until we run out of daylight. |
| Session Leader Summaries |
| Entered: Jan 5 2011 03:10:53:943PM |
| Author: Catherine Fiore |
| Purpose
MP#477 Formation of Ohmic H-Mode ITB with Improved Diagnostic Set The purpose of this experiment is to study the conditions which lead to the spontaneous formation of Ohmic H-mode ITBs with an extended diagnostic set. Shot plan Set up the Ohmic H-mode target shots with an ITB using a field ramp which starts at 5.4 T, decreases to 3.2 T, then increases to 4.6 T. Confirm that an ITB forms. Reference shot is 1070628017 Use caution on the Argon initially until an ITB is established. (20 ms to start?) Establish an ITB. We may need to adjust the strike point on the divertor to achieve this. Then proceed to acquire profile data on reproducible shots. Auxiliary Systems: DNB at 50 kV and 6 A. ICRF: 600 kW may be requested after the run begins Diagnostics: Hirex for Ti profiles and rotation Thomson Scattering CXRS Visible Bremsstrahlung Array PCI Reflectometry GPC 1 and 2 Neutron diagnostics MSE Bolometry FRCECE ____________________ We obtained an ITB on the first shot with our target discharge, but with no argon pulse. Throughout the rest of the run, we were very judicious with application of argon, and it seemed to enhance our success rate of achieving ITBS. Initially we had some problems with camac and CPCI for several diagnostics, but we had everything working in concert by the last 3 or 4 shots. The best ITBs of the day were on shots 1110105006 and 11101050015. Other shots with ITBs wer 1110105002, 04, 05, 06, 07, 09, 12, and 17. _____________ 1110105001 We got an ITB on the first shot. Unfortunately, we did not get Thomson data, or the trigger on the beam diagnostics, and we have not yet put in argon for HIREX. Thomson will be ready on the next shot, but we're still checking on the beam trigger. There appears to be a camac server problem. We'll try for a repeat after we diagnose the beam problem. 1110105002 ITB, but early back transition. We got Thomson and beam data on this one, so we'll add 75 ms of Argon for the next one. 1110105003 No ITB. Try without the argon. 1110105004 Two ITBs. Try a shorter argon pulse. 30 ms. 1110105005 One weak ITB and an EN mode. Argon was at 30 ms. We'll try to see if the valve will open at 15 ms. 1110105006 Beautiful ITB. Missing MSE for this shot. We'll try to repeat the shot. 1110105007 Two short ITBs with back transitions. Hirex wants more argon, so we'll put 20 ms in. Still having problems with MSE CPCI. 1110105008 Short lived ITB. Density rise stops with onset of large MHD activity on the soft x-rays. We're still debugging MSE problems. 1110105009 Two ITBs. This was at a higher target density of 0.8. We'll try 0.9. There is still quite a bit of MHD activity on the soft x-rays. We're still debugging MSE problems. 1110105010 No H-mode. No ITB. 1110105011 Disrupts before H-mode onset. MSE appears to be working now, so we're returning to the initial target plasma. 1110105012 Good ITB, with peaking that persists through the first back transition. Some of the MSE channels saturated, so we are going to try to repeat. 1110105013 Multiple H-modes and back transitions. No true ITB, but 2 EN modes. Repeat. 1110105014 Similar to shot 13. Multiple H-modes and back transitions. No true ITB, but 3 EN modes. When in doubt, turn off the argon and try again. 1110105015 Two good ITBs. Probabaly the best shot of the day. Looks like good data from all required diagnostics. We'll try one more with a little bit of argon back in. 1110105016 The shot looks promising, but the ITB is not established before the back transition. The density is peaked afterwards, but is not in H-mode. 1110105017 The H-mode has several back transitions, but the density remains very peaked from 1 to 1.2 s indicating an ITB. |
| Entered: Jan 5 2011 05:20:43:647PM |
| Author: John Rice |
| good start on MP 632 After starting with a locked mode shot for velocity calibration on shot 18, there was a total of 9 shots with reversals. Reversals at 3 currents, 0.75, 1.05 and 0.5 MA were achieved at 5.0 T. At 7.0 T, reversals were observed at 1.05 and 0.7 MA. The density at reversal increases linearly with Ip, but the magnetic field dependence is much weaker than 1/q. Good signal levels with Hirex-Sr will allow for detailed reversal profiles. |
| Physics Operator Summaries |
| Entered: Jan 5 2011 09:40:40:840PM |
| Author: Steve Wolfe |
Physics Operator Summary for Wed, Jan 5, 2011
PO: wolfe
MP#477 Ohmic ITB, SL: Fiore, Shots 1-17
MP#632 Rotation reversal, SL: Rice, Shots 18-33
EO: Cochran, Pierson, Fitzgerald
The machine ran extremely well today, and both MP's got
good results.
The morning experiment concentrated on mostly one discharge
program with minor variations. The point was to assemble as
complete a documentation dataset as possible using all available
diagnostics. Using the reference shot from 2007 (with predictors
recalculated for changes to the magnetics), we readily obtained
ohmic EDA H-modes and ITB's from the first shot. The main issue
was that adding argon killed off the ITB even with very small
puffs. We managed to get a series of shots with adequate argon for
HIREX profile analysis using a puff width of 20msec. The minimum
to open the valve (B-side lower) may be 15msec, based on decreasing
levels of argon in the discharge after a series of shots at this level.
Residual argon with no puff after some puffed cases was sufficient to
analyze, and tended to produce some of the best ITB's. We did a small
density scan to probe the limits of the density range over which ITB's
formed. See the SL_SUMMARY for more details. There was an issue with
triggering of the DNB diagnostics on shot#1, and continuing difficulties
with the MSE DT216, which Josh finally fixed in time for us to get some
good data from this diagnostic as well. Essentially all of the ITB shots
disrupted in flattop or early rampdown, probably due to radiation issues
associated with the ITB, but there were no deleterious effects on subsequent
discharges.
The changeover to John's experiment went smoothly at ~13:00, with
the cryopump turned on for shot#18. The only change to startup
was increasing the PG4 puff from 25 to 50msec. Later in the day
the puff was increased again to 55msec, and minor changes to the initial
pg3 peak (90 to 100V), and the EF4 current (5amps) were made toward the
end of the day. Startup was pretty reliable, with only a couple of bouncy
starts. There was one dud due to failure of the Piezo HV enable
to come on in PULSE on shot#23. We completed the 5T part of MP#632,
including one locked mode calibration shot and density ramps at
.75, 1.05, and 0.5MA current. The first 1.05MA shot disrupted in
rampup due to a random injection, all the rest went through at least
into rampdown, most to full length. We then jumped to the 7.0T cases,
and got good reversals at 1.05MA and 0.7MA. The reversal density appeared
to be a function of current but not Bt. See John's SL_SUMMARY for more
results.
The main physop issue of the afternoon run was control of the density ramps
at low density with the cryopump operating. Best results were obtained with
P=5, D=6, and I=0 for downward ramps or I=1 for upward ramps. While this
setup gave fairly linear response without oscillation after diversion, it was
nevertheless necessary to program targets a little beyond the actual desired
values.
There were a few data system glitches. In addition to the DNB trigger
problem and the MSE digitizer issue, which was found to be due to data
being stored in the model, there was some kind of problem with
SPECTROSCOPY::TOP.VUV:RETICON which caused storage problems for GPC and
the Tantential Z-meter. Josh turned this action off in the tree on
shot #18. Somebody should investigate this and get it fixed before
the data from this system is needed again (John didn't need it).
Power systems ran perfectly, as did the cryopump.
Scorecard:
Tests/No Power shots 0
Duds 1 (no gas)
Fizzles 0
Plasmas 32 (1 ramp-up disruption)
============== ==
Shots 33
|
| Session Leader Comments | |||
| Jan 5 2011 05:38:31:830PM | Yunxing Ma | IDL> mdsopen,'electrons',-1
% Compiled module: MDSOPEN. % Compiled module: MDSVALUE. % Compiled module: MDSCHECKARG. % Compiled module: MDSISCLIENT. % Compiled module: MDSIDLIMAGE. IDL> abs_calib=mdsvalue('calib:abs_calib') IDL> print,abs_calib 6.79291e+13 8.25001e+13 6.10693e+13 7.39505e+13 7.13316e+13 8.12501e+13 7.28128e+13 8.35095e+13 6.68020e+13 7.96403e+13 5.24155e+13 6.15019e+13 6.90216e+13 8.14062e+13 7.54930e+13 8.77475e+13 9.95564e+14 2.24156e+15 8.91762e+14 1.05597e+15 9.00105e+14 1.07131e+15 1.08292e+15 1.27529e+15 8.52669e+14 1.00676e+15 9.28085e+14 1.07371e+15 1.01676e+15 1.18918e+15 9.20238e+14 1.06750e+15 IDL> help,abs_calib ABS_CALIB FLOAT = Array[2, 16] IDL> abs_calib_new = abs_calib IDL> abs_calib_new(1,*)=abs_calib(1,*)*1.2 IDL> print,abs_calib_new 6.79291e+13 9.90002e+13 6.10693e+13 8.87406e+13 7.13316e+13 9.75001e+13 7.28128e+13 1.00211e+14 6.68020e+13 9.55684e+13 5.24155e+13 7.38022e+13 6.90216e+13 9.76874e+13 7.54930e+13 1.05297e+14 9.95564e+14 2.68987e+15 8.91762e+14 1.26717e+15 9.00105e+14 1.28558e+15 1.08292e+15 1.53035e+15 8.52669e+14 1.20811e+15 9.28085e+14 1.28845e+15 1.01676e+15 1.42702e+15 9.20238e+14 1.28100e+15 IDL> mdsput,'calib:abs_calib','$',abs_calib_new % Compiled module: MDSPUT. IDL> mdsclose % Compiled module: MDSCLOSE. | |
| Jan 5 2011 09:11:17:960AM | 1110105001 | Catherine Fiore | We got an ITB on the first shot. Unfortunately, we did not get Thomson data, or the trigger on the beam diagnostics, and we have not yet put in argon for HIREX.
Thomson will be ready on the next shot, but we're still checking on the beam trigger. There appears to be a camac server problem. We'll try for a repeat after we diagnose the beam problem. |
| Jan 5 2011 09:35:12:667AM | 1110105002 | Catherine Fiore | ITB, but early back transition. We got Thomson and beam data on this one, so we'll add 75 ms of Argon for the next one.
|
| Jan 5 2011 04:12:12:370PM | 1110105002 | Yunxing Ma | Fudge factors--
Core TS 1: 0.77 +/- 0.09 Core TS 2: 1.00 +/- 2.00 Core TS 3: 0.77 +/- 0.09 Core TS 4: 1.00 +/- 2.00 Core TS 5: 0.78 +/- 0.09 Core TS 6: 0.78 +/- 0.07 Core TS 7: 1.00 +/- 2.00 Core TS 8: 0.83 +/- 0.11 Core TS 9: 1.00 +/- 2.00 Core TS 10: 1.00 +/- 2.00 Core TS 11: 1.00 +/- 2.00 Core TS 12: 1.00 +/- 2.00 Core TS 13: 1.00 +/- 2.00 Core TS 14: 1.00 +/- 2.00 Core TS 15: 1.00 +/- 2.00 Edge TS : 1.00 +/- 2.00 Core TS 1: 0.93 +/- 0.11 Core TS 2: 1.00 +/- 2.00 Core TS 3: 0.93 +/- 0.11 Core TS 4: 0.94 +/- 0.12 Core TS 5: 0.92 +/- 0.11 Core TS 6: 0.89 +/- 0.08 Core TS 7: 1.00 +/- 2.00 Core TS 8: 0.95 +/- 0.12 Core TS 9: 1.00 +/- 2.00 Core TS 10: 1.00 +/- 2.00 Core TS 11: 1.00 +/- 2.00 Core TS 12: 1.00 +/- 2.00 Core TS 13: 1.00 +/- 2.00 Core TS 14: 1.00 +/- 2.00 Core TS 15: 1.00 +/- 2.00 Edge TS : 1.00 +/- 2.00 gpc_cal_1110105002_all.sav file has been created |
| Jan 5 2011 09:43:46:187AM | 1110105003 | Catherine Fiore | No ITB. Try without the argon.
|
| Jan 5 2011 04:18:10:617PM | 1110105003 | Yunxing Ma | Fudge factors--
Core TS 1: 0.86 +/- 0.05 Core TS 2: 1.00 +/- 1.00 Core TS 3: 0.70 +/- 0.05 Core TS 4: 0.75 +/- 0.04 Core TS 5: 0.76 +/- 0.06 Core TS 6: 1.00 +/- 1.00 Core TS 7: 0.92 +/- 0.11 Core TS 8: 1.00 +/- 1.00 Core TS 9: 1.00 +/- 1.00 Core TS 10: 1.00 +/- 0.14 Core TS 11: 1.00 +/- 1.00 Core TS 12: 1.00 +/- 1.00 Core TS 13: 1.00 +/- 0.10 Core TS 14: 0.96 +/- 0.15 Core TS 15: 0.87 +/- 0.10 Edge TS : 1.00 +/- 1.00 Core TS 1: 0.99 +/- 0.07 Core TS 2: 1.00 +/- 1.00 Core TS 3: 0.88 +/- 0.08 Core TS 4: 0.93 +/- 0.06 Core TS 5: 0.91 +/- 0.08 Core TS 6: 1.00 +/- 1.00 Core TS 7: 1.05 +/- 0.14 Core TS 8: 1.00 +/- 1.00 Core TS 9: 1.00 +/- 1.00 Core TS 10: 1.13 +/- 0.17 Core TS 11: 1.00 +/- 1.00 Core TS 12: 1.00 +/- 1.00 Core TS 13: 1.35 +/- 0.17 Core TS 14: 1.23 +/- 0.23 Core TS 15: 1.29 +/- 0.22 Edge TS : 1.00 +/- 1.00 gpc2_cal_1110105002_all.sav created |
| Jan 5 2011 10:03:34:680AM | 1110105004 | Catherine Fiore | Two ITBs. Try a shorter argon pulse. 30 ms.
|
| Jan 5 2011 10:11:49:373AM | 1110105005 | Catherine Fiore | One weak ITB and an EN mode. Argon was at 30 ms. We'll try to see if the valve will open at 15 ms.
|
| Jan 5 2011 10:30:32:407AM | 1110105006 | Catherine Fiore | Beautiful ITB. Missing MSE for this shot. We'll try to repeat the shot. |
| Jan 5 2011 10:45:18:330AM | 1110105007 | Catherine Fiore | Two short ITBs with back transitions. Hirex wants more argon, so we'll put 20 ms in. Still having problems with MSE CPCI. |
| Jan 5 2011 11:00:59:830AM | 1110105008 | Catherine Fiore | Short lived ITB. Density rise stops with onset of large MHD activity on the soft x-rays. We're still debugging MSE problems. |
| Jan 5 2011 11:26:09:350AM | 1110105010 | Catherine Fiore | No H-mode. No ITB. |
| Jan 5 2011 11:39:07:670AM | 1110105011 | Catherine Fiore | Disrupts before H-mode onset. MSE appears to be working now, so we're returning to the initial target plasma. |
| Jan 5 2011 11:56:26:003AM | 1110105012 | Catherine Fiore | Good ITB, with peaking that persists through the first back transition. Some of the MSE channels saturated, so we are going to try to repeat. |
| Jan 5 2011 12:07:06:797PM | 1110105013 | Catherine Fiore | Multiple H-modes and back transitions. No true ITB, but 2 EN modes. Repeat. |
| Jan 5 2011 12:18:35:263PM | 1110105014 | Catherine Fiore | Similar to shot 13. Multiple H-modes and back transitions. No true ITB, but 3 EN modes. When in doubt, turn off the argon and try again. |
| Jan 5 2011 12:39:34:213PM | 1110105015 | Catherine Fiore | Two good ITBs. Probabaly the best shot of the day. Looks like good data from all required diagnostics. We'll try one more with a little bit of argon back in. |
| Jan 5 2011 04:26:04:290PM | 1110105015 | Yunxing Ma | Fudge factors--
Core TS 1: 0.84 +/- 0.06 Core TS 2: 1.00 +/- 1.00 Core TS 3: 1.00 +/- 1.00 Core TS 4: 0.77 +/- 0.08 Core TS 5: 0.89 +/- 0.11 Core TS 6: 0.87 +/- 0.04 Core TS 7: 0.97 +/- 0.03 Core TS 8: 0.95 +/- 0.16 Core TS 9: 1.05 +/- 0.25 Core TS 10: 1.00 +/- 1.00 Core TS 11: 1.00 +/- 1.00 Core TS 12: 0.85 +/- 0.17 Core TS 13: 1.16 +/- 0.32 Core TS 14: 1.00 +/- 1.00 Core TS 15: 1.00 +/- 1.00 Edge TS : 1.00 +/- 1.00 Core TS 1: 0.97 +/- 0.08 Core TS 2: 1.00 +/- 1.00 Core TS 3: 1.00 +/- 1.00 Core TS 4: 0.89 +/- 0.11 Core TS 5: 1.04 +/- 0.16 Core TS 6: 1.03 +/- 0.05 Core TS 7: 1.13 +/- 0.04 Core TS 8: 1.18 +/- 0.24 Core TS 9: 1.29 +/- 0.36 Core TS 10: 1.00 +/- 1.00 Core TS 11: 1.00 +/- 1.00 Core TS 12: 1.07 +/- 0.27 Core TS 13: 1.35 +/- 0.43 Core TS 14: 1.00 +/- 1.00 Core TS 15: 1.00 +/- 1.00 Edge TS : 1.00 +/- 1.00 gpc2_cal_1110105015_all.sav created |
| Jan 5 2011 12:53:58:590PM | 1110105016 | Catherine Fiore | The shot looks promising, but the ITB is not established before the back transition. The density is peaked afterwards, but is not in H-mode. |
| Jan 5 2011 02:55:21:663PM | 1110105017 | Catherine Fiore | The H-mode has several back transitions, but the density remains very peaked from 1 to 1.2 s indicating an ITB. |
| Jan 5 2011 01:21:26:343PM | 1110105018 | John Rice | good locked mode |
| Jan 5 2011 01:33:10:110PM | 1110105019 | John Rice | locked mode (not intended, density a bit low) no reversal |
| Jan 5 2011 01:48:25:613PM | 1110105020 | John Rice | 5.0 T, 0.75 MA, upward density ramp reversal at |
| Jan 5 2011 02:00:11:563PM | 1110105021 | John Rice | 5.0 T, 0.75 MA no reversal |
| Jan 5 2011 02:15:52:043PM | 1110105022 | John Rice | 5.0 T, 0.75 MA no reversal, density too low? |
| Jan 5 2011 02:40:52:017PM | 1110105023 | John Rice | 5.0 T, 0.75 MA fizzle |
| Jan 5 2011 02:45:20:627PM | 1110105024 | John Rice | 5.0 T, 0.75 MA reversal at |
| Jan 5 2011 02:55:47:467PM | 1110105025 | John Rice | 5.0 T, 1.05 MA disruption |
| Jan 5 2011 03:14:50:110PM | 1110105026 | John Rice | 5.0 T, 1.05 MA late reversal at |
| Jan 5 2011 03:30:21:000PM | 1110105027 | John Rice | 5.0 T, 1.05 MA reversal at |
| Jan 5 2011 03:44:09:640PM | 1110105028 | John Rice | 5.0 T, 0.5 MA reversal at |
| Jan 5 2011 04:00:14:190PM | 1110105029 | John Rice | 5.0 T, 0.5 MA reversal at |
| Jan 5 2011 04:16:47:713PM | 1110105030 | John Rice | 7.0 T, 1.05 MA good density ramp no obvious reversal |
| Jan 5 2011 04:55:02:270PM | 1110105031 | John Rice | 7.0 T, 1.05 MA reversal at |
| Jan 5 2011 04:38:48:123PM | 1110105032 | John Rice | 7.0 T, 1.05 MA reversal at |
| Jan 5 2011 04:54:37:980PM | 1110105032 | John Rice | 7.0 T, 1.05 MA reversal at |
| Jan 5 2011 05:13:38:560PM | 1110105033 | John Rice | 7.0 T, 0.71 MA reversal at |
| Physics Operator Comments | |||
| Jan 4 2011 05:23:09:317PM | Steve Wolfe | Setting up for tomorrow's run Load from 1110104003 Import seg2 from 1070628017, ack the warnings Recalc the magnetics preds (wire#1-8) Update the factor on nl04 BUild segment doesn't find anything Build All finds that I must not have done wire 8. Go back and do over Build all completes correctly Import seg3 from seg2 of 1100325023 change TF from 150 to 139kA (5.0T), change Ip from 800 to 750kA Change nl04 from 6e19 ramping down to 2e19 to ramp from 3e19 to 5.25e19 Remove H-bot puff at 1.0sec and AMHD waveform on V17-32 screen Import seg4 from seg4 of 1101124004 (locked mode shot) Verify build with seg3 turned on Verify build with seg4 turned on Turn seg2 back on and re-do the build_all Check the procedures; all look ok. Save as 1110105000 in pcs_scratch in /home/wolfe/pcs_scratch and in alcdata-test::/cmod/trees/test/pcs and dpcs Should be ready for tomorrow. | |
| Jan 5 2011 07:27:29:617AM | Steve Wolfe |
Before shot#1
Load from 1110105000, prepared yesterday
Verify segs 1&2 on, 3&4 off
seg1: pg3 90V@-19msec, 35V plateau
pg4 25msec
RCUR offset=3500, BR_0 offset=0, IC_EF4U=-1290
seg2: PG3 feedforward puff ~20V,
TF rampdown to -82000, back up to -128000
Ip=800kA, NL04=7e19, IC_EF4u=2000, ZXL ramping down thru flattop
All look ok
We'll start with cryopump off, RF in standby
Load at 5-Jan-2011 07:27:06.00
Open tree /home/wolfe/pcs_scratch -1
Open tree done
| |
| Jan 5 2011 09:07:14:240AM | 1110105001 | Steve Wolfe | shot#1: plasma to 1.2sec, sort of like the reference shot. L-H transition at .8sec, density rises until H-L at 1.08 ECE cutoff after 1.05 sec or so, Startup looks ok, rising pressure after breakdown No YAG data. This is getting annoying. Next shot: repeat with Thomson, we hope. Also, CXRS needs a trigger may be an issue with DNB tree? Argon for Hirex soon, but not yet. |
| Jan 5 2011 09:33:34:803AM | 1110105002 | Steve Wolfe | shot#2: Repeat after delay for DNB data acq issue plasma, similar to #1, lasts to 1.36sec, glitch in current rise at .12, H-L at 1.1sec Got Thomson data, we seem to have DNB/CXRS data Next: argon on at 75msec at .3sec, 100% |
| Jan 5 2011 09:43:06:883AM | 1110105003 | Steve Wolfe | shot#3: Repeat with argon on at 75msec at .3sec, 100% (B-side lower) plasma into rampdown 1.6sec, no ITB, a few short H-modes. Now can I blame the Argon? Next: Turn off argon again. |
| Jan 5 2011 10:03:20:350AM | 1110105004 | Steve Wolfe | shot#4: Turn off argon again. No other changes. plasma to 1.4sec, two H-modes, both with ITB's injection around .3sec does not seem to cause a problem Still enough argon around to make hirex measurements level in L-mode is 10-20% of that on #3. Next: argon back on, 30msec this time |
| Jan 5 2011 10:09:44:893AM | 1110105005 | Steve Wolfe | shot#5: argon back on, 30msec this time, still using 100% plasma to 1.7sec, three H-modes, weak if any ITB? Next: argon down to 15msec puff (you thought I was kidding about homeopathic dosage?) |
| Jan 5 2011 10:30:36:420AM | 1110105006 | Steve Wolfe | shot#6: argon down to 15msec puff plasma disrupted at 1.1sec during an ITB two h-modes, first starts at .64sec earlier than previous shots. SL likes the ITB, see if we have all the data we need. Still didn't get MSE trigger, should be fixed for next shot Next: repeat |
| Jan 5 2011 10:40:06:653AM | 1110105007 | Steve Wolfe | shot#7: repeat plasma to 1.25sec, several injections, h-mode back to 0.8, H-L at 1sec, then another L-H ITB not so good, MHD visible on xrays after 1sec Hirex reports decreasing argon level, 15msec may be too narrow Still having cpci problems with MSE, but may be fixed this time. Next: raise argon to 20msec |
| Jan 5 2011 11:03:26:143AM | 1110105008 | Steve Wolfe | shot#8: raise argon to 20msec, we'll see if it opens there. There is still an issue with MSE cpci setting, plasma to 1.25, first h-mode lasts longer, HIREX signals up, should be useable. Big MHD seen on xray, ECE, foil bolometers(!) Cell access for polarimeter Next: Fiddle with target density, still not hearing from JAS |
| Jan 5 2011 11:12:19:923AM | 1110105009 | Steve Wolfe | shot#9: Raise nl04 from 7 to 8e19 plasma to 1.35sec, 2 hmodes, possibly 2 ITB's Next: raise nl04 from 8 to 9e19 |
| Jan 5 2011 11:25:15:383AM | 1110105010 | Steve Wolfe | shot#10: raise nl04 from 8 to 9e19 Josh is still looking into the MSE non-trigger issue plasma to 1.7sec, no hmode Next: drop nl04 to 6e19 |
| Jan 5 2011 11:39:14:650AM | 1110105011 | Steve Wolfe | shot#11:drop nl04 to from 9 to 6e19 Josh claims MSE should be fixed now. Early disruption, .75sec, looks like an injection could be a vertical problem, EFC current thrashes maybe before TQ Next: back to 0.7e19 on nl04 |
| Jan 5 2011 11:56:17:190AM | 1110105012 | Steve Wolfe | shot#12: back to 0.7e19 on nl04 to pick up MSE for the base case plasma to 1.3sec, 2 h-modes, ITB's; to the untutored eye, these look weaker than the earlier shots at this density. MSE has data, but many channels saturated; need to repeat Next: repeat |
| Jan 5 2011 12:05:34:637PM | 1110105013 | Steve Wolfe | shot#13: repeat plasma to 1.7sec, first h-mode at .73sec killed by injection at .87, followed by a couple more. Not sure about ITB, but it doesn't look good. No ECE cut-offs. Next: repeat |
| Jan 5 2011 12:17:15:957PM | 1110105014 | Steve Wolfe | shot#14: repeat again plasma to 1.6sec, multiple Hmodes, questionable ITB Next: argon off |
| Jan 5 2011 12:36:54:040PM | 1110105015 | Steve Wolfe | shot#15: repeat again, with argon puff off plasma to 1.45sec, ITB seems somewhat better. Cutting off the argon helps, but the signal is down on HIREX MSE data ok Next: turn argon back on at 20msec |
| Jan 5 2011 12:52:16:940PM | 1110105016 | Steve Wolfe | shot#16: turn argon back on, 20msec puff plasma to 1.2sec, got an ITB again DAQ error on GPC data Also the tangential zmeter Next: repeat, without argon |
| Jan 5 2011 01:08:07:113PM | 1110105017 | Steve Wolfe | shot#17: repeat, without argon plasma to 1.3sec, first H-L at 1sec, not so good ITB on first H-mode GPC store action failed again, Josh has been contacted Also Zmeter_F_TAN again Last shot of MP#477. Next: Begin afternoon experiment with Locked Mode Cal shot Cryopump on |
| Jan 5 2011 01:20:13:897PM | 1110105018 | Steve Wolfe | shot#18: Begin afternoon experimentMP#632 with Locked Mode Cal shot Cryopump on Seg2 off, Seg 4 on Increase Seg1 PG4 from 25 to 50msec plasma 1.6sec, I think there's a locked mode at 0.65sec, harder to tell with GPC at wrong field setting. Trash on nl04 after 1.2sec GPC and zmeter data are back, notified Matt about reticon Startup ok, breakdown a little late Next: Move on to John's first shot (seg3) |
| Jan 5 2011 01:33:05:090PM | 1110105019 | Steve Wolfe | shot#19: Move on to John's first shot (seg3) Seg4 off, seg3 on Change argon puff from 100msec to 200msec This is supposed to be 5.0T, 750kA, rising density from 3 to 5.25e19; Not sure it will do that low after the ITB's and disruptions this morning plasma to 1.7sec, nl04 ramps from 1.8e19 to 4e19, but it looks like there may be a locked mode for the whole shot. Lots of runways/slideaway after .6sec or so. Next: raise starting NL04, also muck with NL04 gains |
| Jan 5 2011 01:47:11:243PM | 1110105020 | Steve Wolfe | shot#20: Tweak factor on nl04 in seg3, to pick up current calibration raise starting NL04 from 3 to 4e19 (0.5sec), endpoint from 5.25 to 6e19 also reduce early P gain from 9 to 6, leave D at 6, add I gain=1 after 0.5sec plasma full length, density ramp more or less as requested, small oscilation between 0.5 and 1sec, no locked mode Got the reversal Next: ramp down from nebar=0.9 to 0.7e20 |
| Jan 5 2011 02:06:08:927PM | 1110105021 | Steve Wolfe | shot#21: ramp down from nebar=0.9 to 0.7e20 NL04 ramp from 6e19 to 4.2e19 Decrease NL04 P gain to 5 for whole shot, D=6, I=1 plasma, full length, small bounce on startup, density ramp more or less as requested No reversal, SL thinks too low density Next: raise pg4 to 55msec, raise starting point of downsweep by 10% |
| Jan 5 2011 02:17:36:133PM | 1110105022 | Steve Wolfe | shot#22: raise pg4 to 55msec, raise starting point of downsweep from 6.0 to 6.6e19 nl04, raise point at 0.2sec to 6e19 to keep a little gas coming in before 0.4sec; also raise endpoint from 4.2 top 4.6e19 plasma full length, density didn't fall much if at all? No bounce this time. Still not high enough density. Next: Increase the programmed starting point to 7.5e19 at 0.5sec Remove I gain |
| Jan 5 2011 02:30:54:897PM | 1110105023 | Steve Wolfe | shot#23:Increase the programmed starting point to nl04=7.5e19 at 0.5sec Remove I gain Dud. No gas puff, HV enable failed to come on in Pulse Next: try again |
| Jan 5 2011 02:42:32:697PM | 1110105024 | Steve Wolfe | shot#24:Increase the programmed starting point to nl04=7.5e19 at 0.5sec Remove I gain Plasma full length, late-ish breakdown density ramp from 5.6e19 to 3.5e19 got the reversal Next: 1.05MA, nebar ramp from .8 to 1.2e20 |
| Jan 5 2011 03:03:13:793PM | 1110105025 | Steve Wolfe | shot#25: Ip to 1.05MA, NL04 ramp from .5 to .75e20 Early disruption, .24sec, injection? goes resistive after 0.2sec Not obvious why. Next: drop nl04 demand at .2 from 5 to 4.5e19 |
| Jan 5 2011 03:12:36:583PM | 1110105026 | Steve Wolfe | shot#26: Ip to 1.05MA, NL04 ramp from .5 to .75e20 drop nl04 demand at .2 from 5 to 4.5e19 relative to 25 (why not?) plasma full length, Big density drop at .4sec, need more puff No locked mode, surprisingly enough. Possible reversal very late Next: Put back some integral gain, raise the early demand, raise target throughout |
| Jan 5 2011 03:25:39:723PM | 1110105027 | Steve Wolfe | shot#27: Raise demand to 5.5 ramping to 8.5e19, I=1 plasma full length, nl04 ramp from 4.7 to 7.7e19 Next; skip the down ramp, go on to 0.5MA case |
| Jan 5 2011 03:43:01:153PM | 1110105028 | Steve Wolfe | shot#28: go on to 0.5MA case, ramp down instead of up Ip to 0.5MA, Nl04 ramp from 4e19 down to 0.5e19 plasma full length, nl04 from 3e19 to 2e19, gas off after .65sec SL says this is "confusing". Wants to start from a higher point Next: raise initial NL04 to 4.5e19 |
| Jan 5 2011 03:57:09:103PM | 1110105029 | Steve Wolfe | shot#29: raise initial NL04 to from 4 to 4.5e19, same endpoint Set Nl04 I=0 plasma full length, ferocious slideaway after 1.2sec breakdown creeping later. Nl04=3.3e19 down to 1.8e19 Next: 7Tesla, 1.05MA, nebar from .5 to 0.9e20 |
| Jan 5 2011 04:15:07:877PM | 1110105030 | Steve Wolfe | shot#30: TF_Current from 139 to 194 in seg3 Ip from .5 to 1.05MA Nl04 ramp from 4 to 6e19, point at .2sec to 4.5e19, set Nl04 I=1 IC_EF4U in seg1 from -1290 to -1300 plasma full length, bouncy startup, lots of runaways. Density ramp more or less as requested, 2.5 to 5.7e19 field is only 6.9T Next: Raise density ~20%, raise TF to 198kA, tweak startup |
| Jan 5 2011 04:38:29:203PM | 1110105031 | Steve Wolfe | shot#31: TF_Current from 194 to 198kA Nl04 ramp from 5e19 to 7.5e19 IC_EF4U in seg1 from -1300 to -1295 PG3 in seg1 from 90 to 100at -.019sec Shot cycle to 20minutes plasma full length, no bounce, no runaways density went up as planned, Bt=7.0T Got the reversal. Next: repeat the 7T case, 16 or 17minute cycle time |
| Jan 5 2011 04:53:03:567PM | 1110105032 | Steve Wolfe | shot#32: repeat the 7T case, then try for LM calibration on last shot No PCS changes plasma full length, no bounce no runaways density trace looks the same. Next: Try a lower current case 700kA |
| Jan 5 2011 05:12:10:860PM | 1110105033 | Steve Wolfe | shot#33: SL wants more data points, so don't do the second lm calibration Go to 700kA Drop initial NL04 from 5 to 3e19 at .5sec, leaving .2sec point at 5e19, end point still at 7.5e19 No change to startup plasma full length, marfing along, no bounce no runaways Density is ramping, but not smooth. looks like we got a couple of injections. SL says there was a reversal, so we got another data point out of it. End of Run |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:56:44:713AM | Plasma | Ok | |
| 2 | 09:26:31:890AM | Plasma | Ok | |
| 3 | 09:38:57:410AM | Plasma | Ok | |
| 4 | 09:51:38:340AM | Plasma | Ok | |
| 5 | 10:04:38:163AM | Plasma | Ok | |
| 6 | 10:19:04:607AM | Plasma | Ok | |
| 7 | 10:31:35:367AM | Plasma | Ok | |
| 8 | 10:44:46:090AM | Plasma | Ok | |
| 9 | 11:08:09:193AM | Plasma | Ok | |
| 10 | 11:20:51:897AM | Plasma | Ok | |
| 11 | 11:33:40:353AM | Plasma | Ok | |
| 12 | 11:46:23:470AM | Plasma | Ok | |
| 13 | 12:00:03:847PM | Plasma | Ok | |
| 14 | 12:13:22:383PM | Plasma | Ok | |
| 15 | 12:29:43:660PM | Plasma | Ok | |
| 16 | 12:42:30:247PM | Plasma | Ok | |
| 17 | 12:55:35:710PM | Plasma | Ok | |
| 18 | 01:13:47:387PM | Plasma | Ok | |
| 19 | 01:27:11:773PM | Plasma | Ok | |
| 20 | 01:41:31:843PM | Plasma | Ok | |
| 21 | 01:54:08:260PM | Plasma | Ok | |
| 22 | 02:10:17:770PM | Plasma | Ok | |
| 23 | 02:25:30:017PM | Plasma | Ok | |
| 24 | 02:38:12:807PM | Plasma | Ok | |
| 25 | 02:53:26:930PM | Plasma | Ok | |
| 26 | 03:06:22:473PM | Plasma | Ok | |
| 27 | 03:21:43:127PM | Plasma | Ok | |
| 28 | 03:36:57:833PM | Plasma | Ok | |
| 29 | 03:52:10:380PM | Plasma | Ok | |
| 30 | 04:07:25:403PM | Plasma | Ok | |
| 31 | 04:29:43:630PM | Plasma | Ok | |
| 32 | 04:47:30:100PM | Plasma | Ok | |
| 33 | 05:07:51:960PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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