| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Theodore Golfinopoulos |
| Physics operator(s): | Steve Wukitch |
| Engineering operator(s): | Andy Pfeiffer,Sam Pierson |
| Engineering Operator Run Comment |
| MP620: Driving Alfvén Eigenmodes Physics Operators: Steve Wukitch Sessio |
| Session Leader Plans |
| Entered: Nov 24 2010 08:47:07:647AM |
| Author: Theodore Golfinopoulos |
| Carry-over from 1101123, second half of Part 1, MP620
The primary goals of this experiment are to 1. test our ability to couple power to MHD modes from amplitude-modulated ICRF waves, and 2. determine the physics of the observed modes, particularly regarding their drive mechanism and structure. As of yesterday, we had not finished the first half of Part I; we still have to establish a routine modulation on D antenna, or give up and switch to Part II of the MP. Note: this run is to take place as two half-days. It will be broken down so that all low first-pass absorption shots take place on Wednesday. PART I: Base Shot 1100716002 Parameters: B_T=5.4 T, I_P = 0.8 MA, peak nl04=0.5-0.7 x 10^{20} m^{-2} Notes: -B_T and I_P change only in Step 3, where they vary from B_T=5.94-4.86 T and I_P=0.88-0.72 MA. -density is changed starting in Step 6. -If some miracle happens and we finish the first half of Part I, or if we decide to skip ahead, we may get to the second half of Part I, for which we will start puffing hydrogen so that the hydrogen fraction is nH/nD=0.15, approximately. Otherwise, there is a good chance we will not puff hydrogen today. 1. (1-2 shots) calibration - HIREX Sr - locked mode (for MHD spectroscopy). Use 1101028009 as base shot. 2. (1-2 shots) Establish plasma using 1101123023, minus disruptions on Shots 1101123033,34 3. (1-2 shots) Repeat Shot 1101123024, but this time, reverse direction of ramp: t=[0.5 1.5] s, B_T=[5.94 4.86] T, I_P=[0.88 0.72] MA. 4. (3-5 shots) Pick up where we left off yesterday. To start, constant modulation tone at 600 kHz, 12.5 % depth of modulation => 37 mVpp amplitude on Agilent function generator, no frequency sweep. Strong spin-up of mode frequency should mean that modulation frequency will cross the frequencies of several harmonics between 0.8 and 1.2 s in the shot. Slowly increase depth of modulation until we reach a limit beyond which D will surely fault. 5. (2 shots) No change to plasma. Try frequency sweep in modulation frequency, fRange=[550 750] kHz, rep. rate=2 Hz, depth of modulate = maximum ascertained in Step 2 above. Repeat for fRange=[600 700] kHz. 6. (1 shot) Now, attempt to suppress modes by increasing density to nl04=0.65 x 10^{20} m^{-2}. Use no ICRF. If modes are still unstable, increase nl04 by 0.05times10^{20} m^{-2} and repeat. 7. (1-2 shots) Keeping density at nl04>=0.65 x 10^{20} m^{-2}, add unmodulated ICRF to see whether modes can be induced at higher densities, i.e. whether ICRF increases density threshold. Use J antenna at 2.25 MW. Again, make sure CNPA is taking data. 8. (4 shots) Couple to stable modes. - nl04>=0.65 10^{20} m^{-2}. Add only modulated ICRF on D antenna. First, use constant tone at 600 kHz. Then, sweep modulation frequency through 400-800 kHz (75% depth of modulation) in a 2 Hz triangle. If time allows, repeat in narrower frequency range, 550-750 kHz, and again from 600-700 kHz, to increase dwell time at resonance. --- *We will almost surely not get to this, but it was the original plan for this half day:* Puff Hydrogen 1. (1-2 shots) Verify modes exist under low first-pass absorption conditions - Starting with 1100716002, puff hydrogen so that n_H/n_D ~ 0.15, and check whether modes are still present, whether their frequency range and mode structure has changed. Adjust ranges of modulated ICRF frequency sweeps accordingly. If the modes vanish or are no longer suitable for coupling experiments, lower hydrogen fraction, or try raising both B_T, so ICRF absorption layer is outside plasma, and I_P by the same proportion, so the q-profile is not strongly perturbed. Then, check again for modes. IF the modes cannot be resurrected under these low-pass conditions, switch to Part II of the run-plan, which focuses on characterizing the original modes, and postpone these experiments until such time that amplitude modulation can be achieved with a 50 MHz ICRF carrier. 2. (3 shots) Couple to unstable modes. - Using 1100716002 (with original density), add only amplitude modulated ICRF using D antenna (no other ICRF power). Sweep through 400-800 kHz in a 2 Hz triangle (75 % depth of modulation) so that there will be two complete cycles between 0.5 and 1.5 s. Run under low ICRF first-pass absorption conditions (see previous item). Determine whether the modulation can couple to the unstable modes - check whether their amplitude changes as modulating frequency is swept through mode frequency. If time allows, repeat in narrower frequency range, 550-750 kHz, and again from 600-700 kHz, to increase dwell time at resonance. 3. (1 shot) Now, attempt to suppress modes by increasing density to nl04=0.65 x 10^{20} m^{-2}. Use no ICRF. If modes are still unstable, increase nl04 by 0.05times10^{20} m^{-2} and repeat. 4. (3 shots) Couple to stable modes - nl04 >= 0.65 times 10^{20} m^{-2}. Add only modulated ICRF on D antenna, sweeping modulation frequency through 400-800 kHz (75 % modulation) in a 2 Hz triangle. Run under low first-pass ICRF absorption conditions (see above). If time allows, repeat in narrower frequency range, 550-750 kHz, and again from 600-700 kHz, to increase dwell time at resonance. 5. If time remains, attempt to lower hydrogen fraction, and then run shots employing unmodulated ICRF power with J antenna at 2.25 MW, along with a 1 Hz (longer dwell-time at resonance) triangular frequency sweep from 550-750 kHz on the AM-modulated D antenna, to see whether fast ion losses may be incurred. |
| Physics Operators Plans |
| Entered: Nov 23 2010 04:44:31:123PM |
| Author: Steve Wukitch |
| Session Leader: Ted Golfinopoulos
Physics Operators: Steve Wukitch MP620: Driving Alfvén Eigenmodes with Amplitude-Modulated ICRF Waves ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 13:00 Power systems as on: 1101123032 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 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): yes DNB (yes/no): no Vessel temperature: 50/50/50 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s PO Plan 1) PLC test of EF2L - investigate ripple observed 1101123 2) Lock mode calibration discharge as 1101123021 3) reload discharge 1101123032 Couple to unstable modes. - Now (still starting with original 1100716002), add only amplitude modulated ICRF using D antenna (no other ICRF power). Sweep through 400-800 kHz in a 2 Hz triangle (75 % depth of modulation) so that there will be two complete cycles between 0.5 and 1.5 s. Determine whether the modulation can couple to the unstable modes - check whether their amplitude changes as modulating frequency is swept through mode frequency. If time allows, repeat in narrower frequency range, 550-750 kHz, and again from 600-700 kHz, to increase dwell time at resonance. 4. (1 shot) Now, attempt to suppress modes by increasing density to nl04=0.65 x 10^{20} m^{-2}. Use no ICRF. If modes are still unstable, increase nl04 by 0.05times10^{20} m^{-2} and repeat. 5. (1-2 shots) Keeping density at nl04>=0.65 x 10^{20} m^{-2}, add unmodulated ICRF to see whether modes can be induced at higher densities, i.e. whether ICRF increases density threshold. Use J antenna at 2.25 MW. Again, make sure CNPA is taking data. 6. (3 shots) Couple to stable modes. - nl04>=0.65 10^{20} m^{-2}. Add only modulated ICRF on D antenna, sweeping modulation frequency through 400-800 kHz (75% depth of modulation) in a 2 Hz triangle. If time allows, repeat in narrower frequency range, 550-750 kHz, and again from 600-700 kHz, to increase dwell time at resonance. 7. investigate influence of H concentration on MHD modes and modulated ICRF |
| Session Leader Summaries |
| Entered: Nov 24 2010 06:58:51:650PM |
| Author: Theodore Golfinopoulos |
| After a tough start, we managed to salvage the run by changing the base equilibrium starting on Shot 12. The big successes for the day were
1. Getting in a second Alfven scaling shot (Shot 8) 2. Finding a really good equilibrium for which ICRF couples well (excellent impedance match, despite sweeping AM frequency) (Shots 12-15) 3. Passing through unstable mode frequencies with AM modulation on D antenna, both constant tone and sweeping frequency (Shots 7, 12-15) 4. "Priming the pump" with unmodulated RF up to 1.0 s, which may have caused the unstable modes to appear sooner (Shots 14,15) 5. Suppressing the modes with higher density, while having a chance to see whether fast ions destabilize modes, and whether we can couple to stable modes (Shot 15) 6. Getting a good current signal on magnetics digitizers from D antenna. 7. Getting a better idea for how ICRF power feedback control system behaves when there is amplitude modulation. I'll need to do a full analysis of many magnetics probes before I can say whether we successfully drove any resonances with ICRF. Goals Step 1 Locked mode for absolute velocity calibration Step 2 Establish plasma, make sure modes are there. Step 3 Check Alfven scaling. Ramp down B_T so that V_A and omega_{TAE gap center} fall (against background mode frequency spin up) and ramp down I_p to try to hold q profile steady. Step 4 Run ICRF amplitude modulation with modulation frequency in range of unstable modes. Find maximum depth of modulation allowable without tripping D antenna. Step 5 Add modulated ICRF; run constant tone through modes and sweep AM frequency through modes Step 5.5 Use unmodulated ICRF with J antenna from 0.5-1.0 s, then use amplitude-modulated ICRF with D antenna from 1 to 1.5 s. This way, can try to combine Steps 4 and 5 in MP, and might also "prime the pump" for the modulation coupling. Step 6 Try to suppress modes by increasing density Step 7 Add unmodulated ICRF to see whether this destabilizes the modes that were suppressed suppressed due to higher density Step 8 Add modulated ICRF to see whether stabilized modes can be driven. -Never got to low first-pass absorption. -Had much lower depth of modulation than originally intended (by a factor of 6). Shot-by-Shot: SHOT: Goal: Result: 1 Test No data - repeat 2 Test Try again 3 Test Move on 4 Step 1 Success 5 Step 2 Disruption - skip to Step 3 6 Step 4 Fizzle 7 Step 4 Success - 12.5 % modulation works; try 25 % next time (Shot 9) 8 Step 3 Success 9 Step 4 Tripped D; decrease depth of modulation; try 18.75 % 10 Step 4 Tripped D; even though turned ICRF on later for density flattop 11 Step 4 Tripped D; use 12.5 % depth of modulation 12 Step 6 Success; constant AM freq.; needs analysis to see whether coupled to modes 13 Step 6 Success; sweeping AM freq.; needs analysis to see whether coupled to modes 14 Step 5.5 Success; needs analysis to see whether coupled to modes 15 Steps 6,7,8 Success; needs analysis to see whether coupled to modes Scorecard: 10 full-length plasmas, 1 disruption, 1 fizzle, 3 test shots for engineering To do: See SL_SUMMARY from yesterday, 1101123 -Also, check CNPA data to look for fast ion activity, especially on Shots 13 (null point) and Shots 14 and 15; 14 and 15 had unmodulated ICRF power from J antenna in the first half of the flattop. -Synchronous detection on lots of Mirnov probes, particularly for Shots 13, 14, and 15 -Some debugging on ICRF modulation system Thanks to the whole crew for giving us that last (fantastic) shot, and especially to the RF guys for the extra hard work on this one (that includes the Phys. Op.). Thanks, David Pace, for really helping out with analysis during the run. |
| Physics Operator Summaries |
| Entered: Nov 24 2010 01:59:54:867PM |
| Author: Steve Wukitch |
| First 3 discharges were used to investigate EF2L power supply
oscillation. The oscillation was identified but thought to be tolerable. This issue will be addressed during the next maintenance day. The experiment commenced and the initial struggle was with density time trace prior to 0.6 s. After struggling for a number of discharges, the session leader made wise decision to change the target discharge to 1100714014 for 012 and the physics experiment became more fruitful. The RF modulation became more reliable and we were able to sweep through with the frequency range of the modes with the RF modulation. We did not get to increasing the H fraction to modify the single pass absorption and its affect on the driving the modes. score power test 2 data system 1 plasma 9 fizzle 1 (006) disruption 2 (locked mode 005, snowflake 010) ---------------- total 15 |
| Session Leader Comments | |||
| Nov 24 2010 09:15:34:233AM | 1101124001 | Theodore Golfinopoulos | Test shot under PLC control. Shot ran, but it doesn't look like data was stored, so we'll have to do it again.
Next: no-power shot. |
| Nov 24 2010 09:45:09:850AM | 1101124003 | Theodore Golfinopoulos | Trying to get to the bottom of fuzz on EF2 signal. Verdict is go ahead.
Next: locked mode shot. |
| Nov 24 2010 09:49:56:023AM | 1101124004 | Theodore Golfinopoulos | Locked mode shot.
Result: success Next: Bring back 1101123032 and establish plasma, modes. |
| Nov 24 2010 10:34:19:953AM | 1101124005 | Theodore Golfinopoulos | Bring back 1101123032 and establish plasma, modes. Last-minute decision to use ICRF modulation, constant tone at 600 kHz, 37 mVpp amplitude =>12.5% depth of modulation.
Result: Disruption, similar to Shots 1101123033 and 34. Cell access: Alan Binus and I went into cell to determine why we are not getting current signal from D antenna. We metered a signal generator input connected and disconnected from digitizer ACQ216_1:INPUT_01 and ACQ216_3:INPUT_14 - there was no loading on the signal. Still a question mark as to why crystal output was not being digitized. We also found that the connection out of the demodulator had been reading the current out of E antenna (not in use) instead of D antenna, and swapped the input back to D antenna (this is because E and D antennas both have outputs labeled J114). Currently, ACQ216_1:INPUT_01 hooked to DI1 output J114. Next: Same thing, but earlier gas to try to prevent disruption. |
| Nov 24 2010 10:35:14:893AM | 1101124006 | Theodore Golfinopoulos | Fizzle.
Next: Try again, also use ICRF modulation, constant 600 kHz tone, 37 mVpp amplitude=>12.5 % depth of modulation. |
| Nov 24 2010 11:32:25:963AM | 1101124007 | Theodore Golfinopoulos | Plasma
We had RF at 600 kHz modulation, 37 mVpp ampl=>12.5% depth of modulation. Went right through frequency range where modes usually live, but no coherent modes visible, though hash was still there. We must establish the modes again without RF. Interesting: the feedback control system on ICRF seems to be fighting with the HF modulation, so that the power into D waves around 3 Hz. Note: D antenna current measured on ACQ216:INPUT_01 seems to saturate voltage at 2.5 V. This is weird because the voltage range is supposed to be up to 10 V according to the digitizer settings. Next cell access, I will install an attenuator between the D antenna signal and the digitizer. Note that band-pass filtering the recorded voltage from ACQ216:INPUT_01 may still recover something of the envelope signal. Next: Alfven scaling, take two: ramp field and plasma current down instead of up, so that Va and TAE band gap center frequency goes in opposite direction of normal mode spin-up. No ICRF except for pulse from D from 1.5 to 1.6 s, 37 mVpp ampl, 600 kHz constant tone. |
| Nov 24 2010 11:29:55:643AM | 1101124008 | Theodore Golfinopoulos | Plasma
Modes are there - extra weak. We got our ramp of plasma current and toroidal field. Need analysis to check for Alfven scaling. Next: Step 4 in Run Plan - note we have skipped Step 2. Agilent settings: 600 kHz constant tone, 75 mVpp ampl.=>25% depth of modulation. |
| Nov 24 2010 11:54:37:957AM | 1101124009 | Theodore Golfinopoulos | Plasma
Modes are present. ICRF AM increased to 75 mVpp. Still 600 kHz constant modulating frequency. D antenna tripped early and did not come back - was not on during modes. Cell access: put crystal detector out from D antenna and digitize now on ACQ216_3:INPUT_13 - should now have two measurements of D antenna current. Also, put 8 dB attenuator on input from D antenna to try to prevent clipping on our digitizer. Next: 55 mVpp ampl on Agilent, increase mod. freq. to 650 kHz. Same plasma, but with gas turn-off extended to later in shot to try to keep density flatter throughout shot. Let's see if our current measurements work. |
| Nov 24 2010 12:09:57:523PM | 1101124010 | Theodore Golfinopoulos | Disruption around 0.9 s. Long enough for D antenna to get a chance to turn on, but it tripped early and died.
Next: 55 mVpp ampl. on Agilent, 650 kHz, BUT delay turn-on of D until 0.75 s per Steve Wukitch's hunch that a flatter density will lead to a better match. |
| Nov 24 2010 12:23:31:707PM | 1101124011 | Theodore Golfinopoulos | Plasma
D antenna on at 0.75 s, 55 mVpp ampl., 650 kHz constant tone. Tripped - several restarts did not resurrect, so no RF. Pity because modes looked nice. Steve successfully got the density flatter for longer. Seeing a signal on the (now intentionally attenuated) ACQ216_1:INPUT_01 - does show us the D antenna current restarts. Kind of weak. Maybe 8 dB is too much attenuation. Next: Change the equilibrium to 1100714014. This shot is that listed for Part II of the MP. It has a flatter density trace, which may help the ICRF impedance match. Agilent settings: 37 mVpp, 600 kHz constant tone. ICRF waveform: on at 1 s, off at 1.5 s because modes appeared late in this shot. They have a slower spin-up, also. |
| Nov 24 2010 12:36:58:953PM | 1101124012 | Theodore Golfinopoulos | Plasma, modes, and ICRF AM!
This plasma seems to be giving us less trouble - better density control. Agilent Settings: 37 mVpp=>12.5 % depth of modulation, 600 kHz constant tone. ICRF waveform on later: 1.0 s - 1.5 s on. Modulation frequency is a little high - looks like AM frequency settles on where mode should be, but there are some clear modes underneath it, and it's hard to pick one out where the modulation is. ACQ216_1:INPUT_01 is getting a current signal, but it looks like there is too much attenuation. That 8 dB attenuator should be removed; leave either with no attenuation or 3 dB. Next: Same plasma, now sweep ICRF frequency at 2 Hz rep rate, 37 mVpp ampl., 450-750 kHz frequency range. Hopefully, we will not miss the modes. Cutting it close. |
| Nov 24 2010 12:54:45:620PM | 1101124013 | Theodore Golfinopoulos | Plasma, modes, and sweeping ICRF AM!
Agilent Settings: 37 mVpp=>12.5 % depth of modulation, 450-700 kHz frequency range, rep. rate. = 2 Hz. t=1.204 s, f=446 kHz t=1.452 s, f=746 kHz Looks like we cross through frequency range of modes between 1.2 and 1.3 s. Next: Turn on J, 1.5 MW from 0.5 to 1.0 s to try to get some fast ions - see if modes turn on earlier. (Unmodulated ICRF.) Then, from 1 to 1.5 s, modulate ICRF at 450-600 kHz, 4 Hz rep rate, 37 mVpp ampl. |
| Nov 24 2010 01:49:40:643PM | 1101124014 | Theodore Golfinopoulos | Plasma, modes, and sweeping ICRF AM!
Agilent Settings: 37 mVpp=>12.5 % depth of modulation, 450-600 kHz frequency range, rep. rate. = 4 Hz. t=1.203 s, f=448 kHz t=1.327 s, f=597 kHz Several frequency crossings of modes, and modes seem to come on earlier now that we have unmodulated ICRF from J. Crystal detector giving D antenna current measurements. Cell access: took out attenuator from D antenna current. Next: Increase density target to 0.65x10^{20} m^{-2} to try to suppress modes - see if modulation/ICRF power makes them last into higher densities. Ramp power from J to try to stay out of H mode. |
| Nov 24 2010 01:49:10:317PM | 1101124015 | Theodore Golfinopoulos | Plasma, sweeping ICRF AM, no modes.
Higher density suppressed modes again. Need analysis to see whether we excited stable modes. Can do it now because the crystal detector was giving us current measurements from the last two shots. D antenna current demod channel still saturating our digitizer, but can probably salvage something from this, too, by band-pass filtering the signal. May be some heightened hash at the upper frequency bend points, though the Mirnov coils' resonance is probably picking this up. Agilent settings: 37 mVpp=>12.5 % depth of modulation, 450-650 kHz frequency range, rep. rate = 4 Hz. |
| Physics Operator Comments | |||
| Nov 24 2010 09:22:08:110AM | 1101124001 | Steve Wukitch | EF2L test under PLC control - PHYSOP disabled
result: completed - data is lacking - trying to recover next: repeat EF2L test under PLC control |
| Nov 24 2010 09:28:56:920AM | 1101124002 | Steve Wukitch | no power test
result: completed next: EF2L test under PLC control |
| Nov 24 2010 09:41:11:367AM | 1101124003 | Steve Wukitch | EF2L test under PLC control - PHYSOP disabled
result: test - EF2L has noise next: locked mode calibration enable Ar (B-side lower) no cryo pg4~25 ms run from seg1 Load at 24-Nov-2010 09:40:47.00 |
| Nov 24 2010 09:57:35:077AM | 1101124004 | Steve Wukitch | plasma - locked mode as requested
next: repeat 1101123032 enable cryo changed pg4~50 ms in seg1 as set in 1101123032 enabled seg2 Load at 24-Nov-2010 09:57:23.00 |
| Nov 24 2010 10:24:21:167AM | 1101124005 | Steve Wukitch | plasma - early disruption
early locked mode - density decay breakdown okay next: repeat without disruption raise NL04 in seg2 0.1 s demand 3x10^19 0.15 s demand 4.5x10^19 0.25 s demand 5.5x10^19 Load at 24-Nov-2010 10:19:45.00 cell access to investigate current probe |
| Nov 24 2010 10:43:36:770AM | 1101124006 | Steve Wukitch | fizzle
Bz little more positive compared to 005 Br looks unchanged breakdown started as usual but plasma failed to thrive next: made EF4 more negative (from -1280 to -1290 A) Load at 24-Nov-2010 10:41:13.00 |
| Nov 24 2010 11:08:45:263AM | 1101124007 | Steve Wukitch | plasma
still have density pumpout when plasma diverts RF ran next: demand more density before plasma diverts at 0.25 s move demand 6.5x10^19 from 5.5x10^19 current ramp from 880 kA to 720 kA BT ramp from 6 T (166 A) and 4.86 T (135 A) Load at 24-Nov-2010 11:07:07.00 |
| Nov 24 2010 11:34:19:350AM | 1101124008 | Steve Wukitch | plasma
current ramp from 0.88 MA, 0.63 s and 0.72 MA, 1.5 s BT ramp from 5.9 T, 0.5 s to 4.85 T, 1.5 s breakdown is okay next: remove current and BT ramp still work on density trace density excursion correlates with Ar puff Load at 24-Nov-2010 11:32:38.00 |
| Nov 24 2010 11:52:36:477AM | 1101124009 | Steve Wukitch | plasma
breakdown okay density trace is still poor ICRF modulation is poor next: lower modulation amplitude work on density time history Load at 24-Nov-2010 11:51:25.00 |
| Nov 24 2010 12:07:33:593PM | 1101124010 | Steve Wukitch | plasma - disruption at ~0.9 s
source of disruption is likely a low Z snowflake RF modulation is still poor next: raise density demand Load at 24-Nov-2010 12:07:23.00 |
| Nov 24 2010 12:18:54:790PM | 1101124011 | Steve Wukitch | plasma
breakdown is okay RF faulted out next: recall 1100714014 in seg2, 0.7 MA Load at 24-Nov-2010 12:18:35.00 |
| Nov 24 2010 12:30:01:330PM | 1101124012 | Steve Wukitch | plasma
breakdown is okay RF ran - match is okay but will chase it next: repeat Load at 24-Nov-2010 12:29:54.00 |
| Nov 24 2010 12:43:57:493PM | 1101124013 | Steve Wukitch | plasma
breakdown is okay good RF modulation sweep next: add J power from 0.5-1 s at 1.5 MW |
| Nov 24 2010 01:02:41:710PM | 1101124014 | Steve Wukitch | plasma
breakdown okay H-mode with J next: raise density to 6.5 from 5.5 ramp J power Load at 24-Nov-2010 13:02:05.00 |
| Nov 24 2010 01:09:59:513PM | 1101124015 | Steve Wukitch | plasma
breakdown okay H-mode with J EoR |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:06:47:610AM | Test | Bad | |
| 2 | 09:19:43:970AM | Test | Bad | Cycle test |
| 3 | 09:29:06:400AM | Test | Ok | EF2 lower stilhas noise |
| 4 | 09:44:46:597AM | Plasma | Ok | |
| 5 | 10:00:46:380AM | Plasma | Bad | OH1 self powered fired |
| 6 | 10:30:26:830AM | Plasma | Ok | |
| 7 | 10:43:44:177AM | Plasma | Ok | |
| 8 | 11:12:40:100AM | Plasma | Ok | |
| 9 | 11:34:06:347AM | Plasma | Ok | |
| 10 | 11:54:33:190AM | Plasma | Ok | |
| 11 | 12:08:11:657PM | Plasma | Ok | |
| 12 | 12:20:47:323PM | Plasma | Ok | |
| 13 | 12:37:36:537PM | Plasma | Ok | |
| 14 | 12:49:52:557PM | Plasma | Ok | |
| 15 | 01:04:05:443PM | Plasma | Ok | |
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