| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | David Pace,Aaron Bader |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Sam Pierson,Bill Parkin,Ed Fitzgerald |
| Engineering Operator Run Comment |
| MP646 - Development of scanning probe operation as an energetic ion loss |
| Session Leader Plans |
| Entered: Feb 15 2011 10:19:32:127AM |
| Author: Aaron Bader |
| Session plan for 1110217 MP 629, day 1.
The first part of the MP, "Establishing the plasma equilibrium," will be completed in the morning by MP 646. We will start with this equilibrium. The rest of the run day consists of current scans at different magnetic fields. NL_04 should be around 0.6-0.7 * 10^20, or whatever is achievable in the morning. All shots will be at 3 MW ICRF (or max achievable from J-antenna (or D+E) without going into H-mode) Shot plan: -------------------------------------------------- 1: current scan at 5.4 T (0.6, 0.8, 1.0, 1.2) 8 shots 2: current scan at 5.7 T (0.6, 0.8, 1.0, 1.2) 8 shots 3: current scan at 5.1 T (0.6, 0.8, 1.0, 1.2) 8 shots 4: It may be desirable to remove some of the redundant scan points and replace them with a J-ant phasing scan. We wish to repeat plasma behavior of 1100309018, 1100309019 and the RSAE behavior of 1100309032 (requires all 3 antennas). Repeating 1100309032 is probably the most interesting. 5: Additionally, a high performance steady state CNPA shot may be desirable (as called for in run plan for the second day in the MP) but we may want some of them for immediate comparison. DNB timing and ICRF modulation times: --------------------------------------- In order to accommodate the CXRS boron measurements, ICRF modulation waveforms are different from our previous experiment on 1100309. We ask for a 60 ms on, 40 ms off modulation, attempting 8 modulations in the plasma flattop. ICRF on times will be at 0.64, 0.74, 0.84, ..., 1.34 s. ICRF off times will be at 0.70, 0.80, 0.90, ..., 1.40 s. DNB timing will also be 60 ms on and 40 ms off but shifted relative to the ICRF by 20 ms. DNB on times will be 0.66, 0.76, 0.86,...,1.36 s. DNB off times will be at 0.72, 0.82, 0.92, ..., 1.42 s. Timings are subject to change based on ICRF performance. If we find that the change in Boron over a single ICRF modulation is larger than the drift over the entire shot, we will alter the DNB to allow for background comparisons to be taken between pulses. We should be able to answer this question after the first few shots. Other required subsystems: -------------------------- PCI should be set up to measure the ICRF mode conversion layer to get a second measurement of H to D. Neon seeding should be available in the case of ICRF difficulties. Lab accesses will be granted for ECE changes needed for the field changes. We will attempt to only change the field twice throughout the run day. XeUS should be setup to monitor edge boron. |
| Entered: Feb 16 2011 03:21:10:980PM |
| Author: David Pace |
| MP #646: Development of scanning probe operation as an energetic ion loss detector
SL: D. Pace PO: S. Wolfe ++ Operations ++ - Cyropump requested, beginning with first shot - He ECDC the previous night This experiment begins at 09:00 and ends at 11:00. ++ Goal ++ This experiment seeks to realize discharges that produce the clearest possible ICRH tail ion loss signatures. There are two types of loss that have to potential to allow for conclusive measurement by the A-port scanning probe - coherent high frequency losses, and decaying losses. To produce these losses we will drive large toroidal Alfven eigenmode populations (coherent at f > 400 kHz) and modulate the RF (decay). ++ Setup ++ Setup details (gas, RF, etc.) are to be taken from the SL_PLAN posting for the other experiment occurring today, MP #629 "Characterization of fast ions generated by ICRF: static and dynamic response." That experiment is the priority for the day, while this experiment is designed to operate within its setup parameters. ++ Run Plan ++ The run plan is designed to produce a small collection of optimal discharges in the two hours that have been allotted. This is achieved through a single reference discharge that may receive minor modifications shot to shot. The reference shot is 1101021005 (LSN, B_T = 5.4 T, I_p = 0.8 MA, nL04 = 0.4e20 m^2, outer gap > 1.8 cm). Requested changes to the reference shot: - Set I_p = 600 kA (reduced from reference shot) - Add RF power as described below Shot Plan: 1. Development - discharge with rf1 program, repeat until discharge shape is reliable enough to allow for probe usage (at LaBombard discretion) 2. Probe measurements - repeat previous shot, now acquiring probe measurements 3. Last shot of the experiment: repeat with rf2 program Alternate Ideas - try to increase losses by using more power from D+E and reducing the field (5.1 T) to move the resonance to smaller major radius. If limiter heating is a problem, then we will either increase density or reduce RF power. RF Programming: There are two RF patterns we would like to have available, rf1) TAE production - a) J-antenna injecting CW at maximum available power (2.5+ MW at 78 MHz) b) D and E input 0.5 MW each, CW c) all RF begins at t = 0.15 s and stays on until t = 1.1 s rf2) Decays - a) J-antenna fires in a modulation pattern of 100 ms ON and 40 ms OFF b) RF begins first ON cycle at t = 0.15 s c) repeat this cycle until t > 1.15 s The motivation for the rf1 setup is that it might produce a clear loss signal on the probe that will not necessarily be available for MP629 the rest of the day. If this works well, then we will stick with it until our final two shots, during which we will attempt the rf2 setup. The reason for the rf2 setup is that be extending the ON pulse well beyond a fast ion slowing down time we might increase the loss population to more easily detected levels. ++ Diagnostics ++ The A-port scanning probe (B. LaBombard) and the CNPA (A. Bader) are vital to this experiment and we will not attempt this MP without them. Thomson Scattering: there is a chance that the best loss signals will occur near t = 0.2 s, shortly after the plasma diverts. The Thomson system is able to measure density and temperature profiles at this time without a specialized setup. Magnetics: standard operation with 2.5 MHz sampling rate ECE: most likely that all of the morning shots will be at 5.4 T, standard operation S^3 probe: never to operate past the last closed flux surface, but otherwise cleared for operation during the entire 2 hour experiment MSE: requested that they remove their polarization filters and sample at the maximum 1 MHz rate in order to look for passive fast ion charge exchange in the scrape off layer DNB: no pulses until the MSE Team is satisfied with their acquisition settings (possibly the first three shots). After that, any beam programming is acceptable Fast TCI: requested to operate either channel 2 or 3 depending on the best available signal to noise ratio. If we identify a TAE with the single channel setup, then we will make use of any unintended cell access to switch to differential operation. PCI: requested to operate in the mode requested by MP629, the primary experiment for the day. Reflectometer: standard operation aiming at the measurement of density fluctuations associated with TAEs. HiREX: standard Ar puffing. Signal levels are expected to be low at t = 0.2 s, but we cannot afford to test modified Ar puff schemes during the morning. ++ Experiment Details ++ Team: D.C. Pace, A. Bader, B. LaBombard, A. Dominguez, P. Ennever, T. Golfinopoulos, R.S. Granetz, A. Hubbard, J. Hughes, J. Irby, Y. Lin, Y. Ma, E. Marmar, R. Mumgaard, R.I. Ochoukov, R.R. Parker, M. Porkolab, S. Scott, N. Tsujii, D. Whyte, S. Wolfe, S. Wukitch Objectives: We want to determine whether losses of ICRH tail ions can be detected by the A-port scanning probe. This attempt also provides the probe diagnosticians (LaBombard and Ochoukov) with an opportunity to test their RF rectification circuitry. These probe measurements are potentially very useful to our understanding of core RF tail ion confinement as studied in the companion experiment today, MP #629. That investigation routinely observes fast ion signal decay times shorter than the slowing down time. It is not yet known whether a transport/loss mechanism contributes to this behavior. The best outcomes for this morning's experiment are the successful application of the RF rectification circuitry, and a conclusive measurement of losses by the scanning probe. In terms of the losses, we can aid in their measurement by producing two particular varieties: (1) coherent, high frequency loss flux (2) decaying loss flux with clear time dependence To produce coherent loss flux at frequencies above 400 kHz we will excite many toroidal Alfven eigenmodes (TAEs). These are capable of expelling RF tail ions in a convective process that results in a loss flux that is coherent with the modes. To produce a measurable loss that decays in time, we will modulate the RF. This can be achieved with a series of ON/OFF pulses. At each transition from ON to OFF we should observe a rapid decay in the loss population (once they are lost there are no new ions to lose). There are a few bonuses that we hope to achieve. First is the successful operation of the RF rectification circuitry on the S^3 probe. Since this probe is located below the midplane it is not expected to receive a significant RF tail ion loss flux. It may, however, be capable of observing global potential changes due to such losses. The second bonus would be the detection of passive fast ion charge exchange by the MSE system. The MSE diagnostic has very sharp filters and happens to view lines corresponding to red-shifted H_alpha as is produced in the scrape off layer by ICRH tail ions charge exchanging with neutrals. They can increase their collection by operating without polarization filters and they already sample at 1 MHz. |
| Physics Operators Plans |
| Entered: Feb 15 2011 04:41:06:390PM |
| Author: Steve Wolfe |
| Physics Operator Plan and Engineering Setup for Thursday, Feb 17, 2011
MP#646 Development of scanning prone as energetic ion loss detector SL: Pace and MP#629 Characterization of fast ions generated by ICRF SL: Bader PO: wolfe ----------------- Engineering Setup ----------------- Overnight ECDC in Helium ------------------------------ ECDC Parameters ------------------------------ gas and pressure: He at 5e-5 Torr (if necessary, raise to 1e-4 Torr) sweep: 44/45/103 cm scan: 20/120 s Run begins at 09:00 and ends at 18:00 ** Note late end time ** Power systems as on: 1110214018 Acoil: -Dtop +Dbot +Jtop -Jbot (reverse field setting) 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 with 40 psi D2 Hybrid enabled (PG3) fill H-bottom with 2psi Neon Hybrid DISABLED 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): YES Vessel temperature: 45/45/45 -------------------------------------------------- Physics Operator Plan: Startup taken from a recent +5.4T cryopump shot, e.g. 1110215014 Import seg2 from reference shot#1101021005 and flip traces, recalc b21_Proj for reversed field. Reduce Ip from 800kA to 600kA, per SL_PLAN for MP#646 This shot is +5.4T, nl04=4e19. We may need to increase the density, or it may increase by itself with RF. Starting shot saved /home/wolfe/pcs_scratch/1110217000 RF will be firing early in the shot, nominally at 0.15sec It may be necessary to move the divert time earlier to accommodate the early RF. We don't want to spend a lot of time on this. Obvious changes would be to bring CLEARIN positive earlier, drop ZXL faster, and crowbar EF1 at .12sec. Could also use an alternate shot identified by Pace, 1090916029. This segment was imported into seg3 of 1110217000 and flipped and updated, with the TF reduced from 5.5T to 5.4T. Note that the engineering setup for this shot has EF1 crowbar at .12sec. For the first part of the run. MP#646: 1. optimize equilibrium and RF timing for TAE generation and probe 2. make probe measurements, looking for fast ion loss modulation at TAE freq. 3. Test with modulation on RF waveform, looking for decay of fast ion signal For the second part of the run, MP#629: 0. Tweak 600kA shot as requested by SL, probably increase nl04 to 6-7e19 RF timing will be delayed into flattop and use modulation prescription from SL_PLAN; DNB timing also adjusted to lag the RF pulses. 1. Scan current at 5.4T : 600, 800, 1MA, 1.2MA; if necessary, get rid of early divert sequence, assuming we used it in part 1. 2. Repeat current scan with Bt=5.7T (158.3kA) 3. Repeat current scan with B=5.1T (141.7kA) 4. Change target and RF as described in SL_PLAN to revist results from 1100309 5. Use Steady state RF program Prf~2.5MW |
| Session Leader Summaries |
| Entered: Feb 17 2011 02:28:05:057PM |
| Author: David Pace |
| MP 646: Scanning probe as an energetic ion loss detector
Achieved four plasmas (shots 10-13). There was a one hour delay to address problems with the EF1 power supply (see Physics Operator and Engineering log entries). We did not produce the toroidal Alfven eigenmodes that we had targeted. Based on the experience today, I think the following steps should be taken to improve the TAE recipe for next time: 1) do not begin the RF so early: we should be able to drive the modes with the combination of low density and high power RF, so there is no motivation to begin the RF before 0.5 s 2) use high power RF: it is reasonable to expect that we need P_RF > 4 MW to drive a significant TAE population 3) increase plasma current: low current is not necessarily any help for producing TAEs, but it certainly increases limiter heating. Since the most important operating point is high power RF, it is worthwhile to employ I_p > 800 kA for the sake of reducing wall heating. |
| Entered: Feb 17 2011 06:29:08:200PM |
| Author: Aaron Bader |
| SL summary for MP 629, run on 1110217 comprising shots 14-44. Most were full length plasmas with 4 early disruptions.
Firstly, thank you Steve Wolfe for phys-opping, the RF group and the engineers for helping out past 6:00. This run is for the first half of MP 629, an attempt to measure the fast ion distribution in plasmas with modulated ICRF. The goal of the MP is to measure the fast ion distributions with the CNPA, for comparison with simulation. The machine ran well, injections were limited except towards the very end. Density control was a bit difficult at the beginning, but was better towards the end of the day. ICRF also ran well, except at low currents where it was less clean. This run includes several new diagnostics that were unavailable on previous attempts, including: 1) CNPA sightlines were adjusted for more discrete spatial resolution. 2) CXRS was used to measure boron concentration in the plasma. 3) PCI was used to measure the mode conversion layer and therefore estimate the hydrogen minority concentration. 4) The ASP was parked near the limiter and we attempted to use it as a lost-ion detector. We completed almost 2/3 of the scheduled plans for the first day. We ran current scans at 5.1 T and 5.4 T with power only from J-Ant. We skipped the current scan at 5.7 T, and had trouble running clean ICRF at 600 kA. Additionally, we also included several of the steady state discharges called for in the second day of the MP, getting a full current scan at 5.1 T with J. We were unable to complete the steady state current scan at 5.4 T with J, due to an antenna problem, although we did get a comparison at 1.2 MA and 0.6 MA with D&E. By poaching some of the shots from the second day, we were able to complete 1 full day of the 2 day MP. Analysis of the 5.4 T plasmas may be difficult because of varying density although there was a standout plasma at 1.0 MA (shot 21) 5.1 T plasmas had several good plasmas with shots 26, 27 and 31 being the best. For steady state plasmas, 35-38 were all very good at 5.1 T and these give a full current scan at that field. Shot 40 is an interesting shot that appears to go into I-Mode with 2 MW of power from D&E. Shot 44 is probably the cleanest ICRF at 0.6 kA of the day. The ASP was not successful as a lost-ion collector, although there are fluctuations present that have an unknown source. One difficulty was that we were not capable of biasing the probe enough to operate in Ion Saturation mode close to the separatrix. CXRS boron measurements also require further analysis, although it appears that there is a significant change in boron quantity with the ICRF modulation. This is important for informing time-dependent simulations. Immediate analysis shows the strong dependence of confined fast ions as a function of current. High current plasmas have better confinement of fast ions and this is easily seen with higher CNPA count rates at higher currents. Higher count rates are especially pronounced farther away from the resonance. This effect is seen in both the modulated shots and the steady state shots. We were unable to do phasing scans do to a problem with J-Antenna toward the end of the run. |
| Physics Operator Summaries |
| Entered: Feb 17 2011 06:50:51:607PM |
| Author: Steve Wolfe |
PO Summary for Thursday, Feb 17, 2011
MP#646 Fast ion loss detector using probe (SL: Pace)
MP#629 Characterization of fast ions generated by ICRF (SL: Bader)
PO: wolfe
EO: Pierson, Parkin, Fitzgerald
The start of the run was delayed for repair of the EF1U supply,
which had failed at the end of yesterday's run. Bill Cochran
successfully got the supply back on the air, though without a
definitive diagnosis of the failure. He left instrumentation connected
inside the control cabinet in case of another failure, which did not
happen today. The first 9 shots were EF1 tests, all but #9 being
no power cycles to look at control signals. Shot#9 was a successful
PLC EF1 test.
The first plasma shot was #10, taken at about 10:10AM. Pace's MP#646
was attempted for #10-13, until 11:00AM, but we were plagued by disruptions
and injections and never really got anything useful. Operation at low
density and low current with high RF power proved even more difficult in
reverse field than with forward field, based on this small sample.
Aaron took over the run on Shot#14. This experiment was more successful,
although I had considerable difficulty getting a steady density as required
for the analysis. The cryopump was operating reliably, but keeping
the density from drooping or ramping up using feedback was not very
successful. I tried integral gain but this was ultimately not successful.
The best results were obtained later in the day using a high proportion
of feedforward, with pg3 in segment 2 of 30V through end of flattop, and
gain settings of P=5, D=4, I=0. Mostly
the nl04 was programmed for 7e19, although for the 1.2MA cases I ended
up programming an initial density up to 9e19, then back down, with strong
early pg3 (up to 60V) to prevent an early locked mode that caused
disruptions early in the RF pulse.
We completed most of the current scans #1 and #3, at 5.4T and 5.1T, using
modulated power from J-port. Note that to get the BTOR signal to
come out 5.4T I had to reduce the TF_CURRENT setting from 150kA to
148.5kA, and used 140.3kA for the 5.1T. Since the TF supply demand
is the same (even number of minus signs) for forward and reversed
field, the fact that the Btor sees different values by ~1 to 2%
seems likely to be spurious. Amanda posted a logbook entry that
seems relevant to this, based on ECE observations. This matter will require
further investigation.
After completion of the modulated power scans at these two fields
we proceeded to step 5 of the SL plan and tried to obtain data
with steady rf at several currents and fields. This was going pretty well,
with the injections that had been bothering the earlier part of the
day having mostly gone away, when we lost FMIT#3 to an arc on
shot#39. After a short delay, we proceeeded using D&E, but ran into two
early terminations, both associated with early injections, before
finally getting a second current (600kA) point at 5.4T on shot#44, which
was taken just after the scheduled shutdown time of 18:00; thanks to
the engineering staff for the extra shot.
RF will determine tomorrow whether FMIT#3 can be repaired quickly. The
initial diagnosis points to an arc from the tube to a cooling water
pipe. This is better than a tube failure, but still problematic for
tomorrow.
Scorecard:
No Power tests 8
Power system tests 1
Duds 0
Fizzles/short disr. 2
Plasmas 33 (5 early flattop disruptions)
=============== ==
Shots 44
|
| Session Leader Comments | |||
| Feb 17 2011 09:15:38:333AM | 1110217001 | David Pace | Shot 1 Plan:
- begin with the adjusted reference shot built by Wolfe (this is the shape of 1101021005) - B_T = 5.4 T, I_p = 600 kA, nL04 = 4e19 - RF programming, 2 MW steady beginning at t = 0.4 s Additional Run Notes: - Fast TCI paths on Magnetics digitizer MAGNETICS::TOP.ACTIVE_MHD.DATA_ACQ.CPCI:ACQ216_3:INPUT_14 MAGNETICS::TOP.ACTIVE_MHD.DATA_ACQ.CPCI:ACQ216_3:INPUT_15 - spectral analysis of probe data may be accomplished using W_FLUCT (http://www.psfc.mit.edu/research/alcator/cmodwiki/index.php/Fluctuations), which will automatically find the I_sat or V_f trace depending on how the probe operated - calculation of cross-power, phase, quadrature, etc., may be performed using InSpect (http://www.psfc.mit.edu/research/alcator/cmodwiki/index.php/InSpect) **if looking at probe data, then you have to press Enter after changing the shot number to make sure the probe data path is also updated** Shot 1 Actuality: Beginning of power supply test shot series. |
| Feb 17 2011 10:23:03:970AM | 1110217010 | David Pace | Shot 10 Plan:
See shot 1 listing. Shot 10 Actuality: Full length shot. RF power ~ 1 MW steady. |
| Feb 17 2011 10:35:19:507AM | 1110217011 | David Pace | Shot 11 Plan:
Repeat plasma settings from shot. Increase requested RF power to 3 MW, but end D+E at 1 s to reduce limiter heating. J-antenna will continue after 1 s for conditioning. Shot 11 Actuality: Some fluctuations near 250 kHz. No loss signatures on probe. |
| Feb 17 2011 10:35:47:997AM | 1110217012 | David Pace | Shot 12 Plan:
Begin with shot 11, then increase current to 800 kA. Shot 12 Actuality: |
| Feb 17 2011 10:56:25:907AM | 1110217013 | David Pace | Shot 13 Plan:
Begin with shot 12, try to RF power > 4 MW and a shorter pulse length. Shot 13 Actuality: Early ending. |
| Feb 17 2011 11:19:02:303AM | 1110217014 | Aaron Bader | Shot 14 result: Good plasma, RF good. Density fluctuates a little, but a good first attempt. CNPA signals are too low.
Next shot: Repeat plasma but adjust CNPA aperture. |
| Feb 17 2011 11:41:39:593AM | 1110217015 | Aaron Bader | Shot 15 result: Good plasma, RF not so good. CNPA signals are still too low
Next shot: Repeat plasma, but lower ICRF demand to 2.2 MW. Adjust CNPA aperture to be more open. |
| Feb 17 2011 11:42:29:083AM | 1110217016 | Aaron Bader | Shot 16 result: Plasma disrupts. CNPA count level seems good on J-Top. F-Top could probably be opened more, but it's not worrisome of yet.
Next shot: Repeat plasma, try for full length. Move ICRF 100 ms earlier to allow for some testing of +90 phasing newar the end of the plasma. |
| Feb 17 2011 12:11:59:433PM | 1110217017 | Aaron Bader | Shot 17 result: Plasma disrupts late, but otherwise a good shot. There are some density fluctuations, and a small injection before the RF comes on, and another one at the disruption.
CNPA count rates look good. Peak signal is still on J-Top channel 4 (R = 72.5) consistent with the J resonance at R = 71 cm. DNB did not fire on this shot. Next shot: Move up to 1 MA current. |
| Feb 17 2011 12:09:24:280PM | 1110217018 | Aaron Bader | Shot 18 result: Full length plasma but density is unsteady. RF is good, even the conditioning at the end of the pulse.
CNPA count rates are ok. There is a brief cut out but it's during CNPA dead time between pulses. Next shot: Repeat at 1 MA. Phys-op will invoke some magicks to try to flatten out the density. |
| Feb 17 2011 12:23:36:567PM | 1110217019 | Aaron Bader | Shot 19 result: Full length plasma but density is still unsteady. RF is very good.
CNPA count rates are good. There is an injection shortly after 1s that cuases a cut out on all channels. DNB did not fire Next shot: Repeat, attempt to raise ICRF power. |
| Feb 17 2011 12:42:57:860PM | 1110217020 | Aaron Bader | Shot 20 result: Plasma disrupts late, constant density. Accidentally was at 1.2 MA. ICRF pulses 1 and 3 are ratty.
CNPA count rates are bit lower, but the density is constant. Probably enough signal on Jtop 2 and 4 for analysis, but other channels are dicey. Next shot: Try the 1 MA shot again. |
| Feb 17 2011 12:48:27:660PM | 1110217021 | Aaron Bader | Shot 21 result: Best shot of the day so far. Good signal on CNPA. Good steady ICRF at 2.5 MW. Density is fairly steady.
CNPA count rates are good Next shot: 1.2 MA. |
| Feb 17 2011 01:02:55:447PM | 1110217022 | Aaron Bader | Shot 22 result: Early disruption
Next shot: repeat at 1.2 MA. |
| Feb 17 2011 01:19:11:737PM | 1110217023 | Aaron Bader | Shot 23 result: Good plasma shot, disrupts at 1.4 s. CNPA does not look as clean, and ICRF is ratty on pulses 1 and 2.
Beam timing changed on this past shot for 100 ms on and 100 ms off. Next shot: 600 kA. |
| Feb 17 2011 01:30:11:343PM | 1110217024 | Aaron Bader | Shot 24 result: Good plasma shot. Marfe makes density control harder.
J-Ant ICRF did not work well at all. Retry at lower power. Next shot: 600 kA, J-ant ICRF power at 2.2 MW. |
| Feb 17 2011 01:46:21:580PM | 1110217025 | Aaron Bader | Shot 25 result: Plasma is good but ICRF still has problems. Give up at this current for now and try another field.
Next shot: 1 MA, J-ant ICRF power at 2.5 MW. |
| Feb 17 2011 01:58:02:197PM | 1110217026 | Aaron Bader | Shot 26 result: Good plasma, good ICRF. No beam though
Next shot: Repeat. |
| Feb 17 2011 02:11:37:543PM | 1110217027 | Aaron Bader | Shot 27 result: Good plasma, good ICRF. No beam again.
Next shot: Go on to 1.2 MA with or without beam. |
| Feb 17 2011 02:40:01:597PM | 1110217028 | Aaron Bader | Shot 28 result: Early disruption. locked mode.
Next shot: Repeat. |
| Feb 17 2011 02:39:54:163PM | 1110217029 | Aaron Bader | Shot 29 result: Plasmas is good. Density is dropping throughout the flattop. RF is not as clean.
Next shot: Retry 1.2 MA discharge. |
| Feb 17 2011 02:52:34:677PM | 1110217030 | Aaron Bader | Shot 30 result: Plasmas is good, density is steady but high. RF has trouble on several of the modulations. Probably not enough CNPA signal for a clean analysis.
Next shot: 800 kA. |
| Feb 17 2011 03:09:56:247PM | 1110217031 | Aaron Bader | Shot 31 result: Plasma is good, density is steady but still a tad high. RF is good overall and count rates are probably high enough on J-Top 6.
Next shot: try 600 kA. |
| Feb 17 2011 03:27:17:237PM | 1110217032 | Aaron Bader | Shot 32 result: Plasma is good, but accidentally 800kA again. RF drops 2 modulations but otherwise ok. CNPA signal is a bit low but probably passable on J-Top 6.
Next shot: Try 600 kA. Also try reducing the density a smidge. |
| Feb 17 2011 03:33:55:493PM | 1110217033 | Aaron Bader | Shot 33 result: Plasma is good, density seems good. About half of the ICRF pulses make it through.
Next shot: Repeat 600 kA. |
| Feb 17 2011 03:52:45:480PM | 1110217034 | Aaron Bader | Shot 34 result: Good plasma, RF has the same problems that it did previously. Probably need to sum 33 and 34 to get enough data.
Next shot: move to some of the steady state shots scheduled for day 2 on the MP. 1 MA plasma with 2 MW steady ICRF. |
| Feb 17 2011 04:08:49:373PM | 1110217035 | Aaron Bader | Shot 35 result: Good plasma, good ICRF.
next shot: 800 kA, steady state. |
| Feb 17 2011 04:16:28:930PM | 1110217036 | Aaron Bader | Shot 36 result: Another good plasma, with steady ICRF
next shot: 600 kA. |
| Feb 17 2011 04:30:42:403PM | 1110217037 | Aaron Bader | Shot 37 result: Plasma is full length. ICRF is good, but an injection kills CNPA for about 250 ms.
next shot: 1.2 MA last shot at 5.1 T, come what may. |
| Feb 17 2011 04:44:17:183PM | 1110217038 | Aaron Bader | Shot 38 result: Plasma is full length. ICRF is good, a brief cutout in the middle.
next shot: 1.2 MA at 5.4T steady. |
| Feb 17 2011 05:14:03:890PM | 1110217039 | Aaron Bader | Shot 39 result: Plasma is full length. ICRF has a problem. J-Ant craps out.
next shot: retry 1.2 MA at 5.4T steady RF, but we need to switch to D and E antennas due to a problem with J. |
| Feb 17 2011 05:22:59:880PM | 1110217040 | Aaron Bader | Shot 40 result: Plasma is full length. D&E work well. Unexpectedly, we seem to have generated an I-Mode on the second half of this plasma. Fast-ion counts seem immune to it though.
We want to move the resonance out a little more to have the same resonance layer as we did on the 5.4T J shots. Therefore, we'll up the field, and try for steady shots at 1.2 MA and 600 kA. next shot: 1.2 MA at 5.6T steady RF from D&E. |
| Feb 17 2011 06:19:52:753PM | 1110217041 | Aaron Bader | Shot 41 result: Early disruption
next shot: Reetry 1.2 MA at 5.6T steady RF from D&E. |
| Feb 17 2011 06:20:21:637PM | 1110217042 | Aaron Bader | Shot 42 result: Another early disruption
next shot: try 5.4 T and 600 kA. |
| Feb 17 2011 05:57:50:970PM | 1110217043 | Aaron Bader | Shot 43 result: This was a 0.6 MA plasma at 5.4T The plasma was good, but D antenna faulted out. Not enough CNPA signal for analysis.
next shot: Will retry 0.6 MA at 5.4T steady RF from D&E. |
| Feb 17 2011 06:13:37:913PM | 1110217044 | Aaron Bader | Shot 44 result: Good plasma again. ICRF ran well. Giving us a current comparison at 5.4T (with D & E)
next shot: end of run. |
| Physics Operator Comments | |||
| Feb 17 2011 07:45:26:643AM | Steve Wolfe |
Pre-run setup for Thursday, Feb 17, 2011
MP#646 Probe-based ion loss detector (Pace)
MP#629 Fast ion loss (Bader)
Load from ~/pcs_scratch/pcs_1110217000 saved on Tuesday
Seg1: Reverse field cryopump startup: pg4=65msec, Pg3 60V plateau
Rcur offset=-3500A-m, Br_0=0, IC_EF4U=+1290A
Seg2: from 1101021005 with Ip to 600kA, Nl04=4e19, Bt=5.4 (150ka)
Pg1=100msec @0.3sec (argon), pg3 in seg2
Seg3: (off) from 1090816005, early divertor (EF1 crowbar at .12sec)
with Bt changed to 5.4, Ip=600kA, nl04=8e19, also modified on Tues.
However, notice that All-p screen curents were not flipped!
Do it now: EF2byEF4 to +2000, EF4 swinging to -2700, Ip =+600kA
V01 is ok, pg1=50msec@0.3sec
We did overnight ECDC in helium
Cryo should be ok.
Reduce Seg1 pg4 from 65 to 60msec, pg3 plateau from 60 to 40V
Adjust seg2 nl04 gains from P=8, D=3 (t<0.5sec), I=0 to P=2,D=4,I=1
modify nl04 waveform to eliminate negative values late.
Recall the nl04 factor just to pick up the current scaling,
although it is still not consistent with the tci setting (1.35 vs 1.25)
I want to see what this shot does before making adjustments. Reference
shot diverted around 0.3sec, RF will start at 0.4sec for this shot.
Load at 17-Feb-2011 07:45:09.00
Open tree /home/wolfe/pcs_scratch -1
Open tree done
| |
| Feb 17 2011 07:47:07:160AM | 1110217001 | Steve Wolfe | Bill Cochran is trouble shooting the EF1U failure that cost us the last three shots yesterday. It is likely that we will be staring with a PLC test shot on EF1U, depending on what he does or doesn't find. |
| Feb 17 2011 08:01:43:850AM | 1110217001 | Steve Wolfe | Further pre-run tweaking for first shot: Reduce pg1 puff in seg2 from .1 to .75sec, request B-side Lower enabled for first shot (plenum pressure is 1.2psi) Load at 17-Feb-2011 08:01:26.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done |
| Feb 17 2011 08:25:22:450AM | 1110217001 | Steve Wolfe | Shot#1: no power test shot for debugging EF1U problem Disable gas for these tests. DPCS signals are all present and look normal. Fizzle signal is present and correct. Dalpha camac worked on this shot. |
| Feb 17 2011 08:31:24:050AM | 1110217002 | Steve Wolfe | Shot#2: no power test shot for debugging EF1U problem |
| Feb 17 2011 09:20:29:437AM | 1110217006 | Steve Wolfe | Shot#6: no power test shot for debugging EF1U problem On this shot, it looks like both EF1U gates are behaving properly. There was no fix applied except hanging probes off the signal and inhibit lines; previously the invert inhibit was not staying on, according to the engineers. The decoder that was replaced on Monday is suspected, and will be swapped back out for the original module. Bill is also going to change an integrator reset (I think that's what he said). |
| Feb 17 2011 09:39:20:563AM | 1110217007 | Steve Wolfe | Shot#7: Another no power test for EF1U debugging Decider has been replaced, I think Bill changed whatever he was working on (reset circuit?). Gate signals on EF1U and EF1L look like they worked correctly again (as on #6). With luck, we're ready to run? |
| Feb 17 2011 09:47:48:963AM | 1110217008 | Steve Wolfe | Shot#8: With luck, we're ready to run? Apparently not, we're taking "the last EF1 test shot". Gate signals still look ok to me (3 in a row). |
| Feb 17 2011 09:58:54:983AM | 1110217009 | Steve Wolfe | Shot#9: EF1U test with power, PLC control. Got +2kA on both supplies, as programmed. Bill is going to leave instrumentation connected to live scopes inside the cabinet, in case there is a problem later in the day. Should be ready to try for plasma |
| Feb 17 2011 10:20:30:610AM | 1110217010 | Steve Wolfe | Shot#10: try for plasma plasma full length, density is nice and low, actually puffing the whole shot, starts around 2e19, rises to 4e19 after 1sec J faulting, D and E ok. Prf~1MW Looks like a locked mode from .4 to about 0.9sec Diverts around 0.25sec. Breakdown may be a little late, no light on Z-meter. Runaways early. Next: increase pg4, and pg3 in seg1, add pg3 feedforward in seg2 |
| Feb 17 2011 10:41:24:550AM | 1110217011 | Steve Wolfe | Shot#11: increase pg4 from .60 to .65, and pg3 in seg1, add pg3 feedforward in seg2 from 40 to 60V, pg3 in seg2 to 10V feedforward Result: plasma to .7sec, injections during rf, Initial density was 4e19, but falls until RF comes on No locked mode, lots of small injections, followed by not so small injection. Clean breakdown, no early runaways RF choppy, up to 3MW (J faulting, D, E ok) Bouncing object seen on wide 2 view on floor in front of F-port. K and GH limiters get hot Next: raise Ip from 600 to 800kA, put a small pg3 puff .1sec |
| Feb 17 2011 10:52:18:927AM | 1110217012 | Steve Wolfe | Shot#12: raise Ip from 600 to 800kA, put a small pg3 puff 40V from .1 to .2sec Earl has adjusted zmeter alignment Result: plasma to .5sec Twin launches from inner divertor in front of F-port. RF was stable at 3MW until the disruption Zmeter signal is back Klimiter is still hot. Next: Try moving inner strike higher on the plate tweak gas in seg2 |
| Feb 17 2011 10:59:48:853AM | 1110217013 | Steve Wolfe | Shot#13: Try moving inner strike higher on the plate Move RXL from +.005 to -.015 at .3sec and thereafter extend seg2 pg3 at 40V to .35sec plasma to 0.45sec, didn't look like the strikes moved that much. density still drops at .35sec. I did load it, may not have applied the RXL change. Next: Changing to Aaron's part of the run Raise nl04 to 7e19, RF will change timing. |
| Feb 17 2011 11:11:57:667AM | 1110217014 | Steve Wolfe | Shot#14: Changing to Aaron's part of the run Raise nl04 to 7e19, Increase pg3 in seg2 to 50V, 20V maint Decrease TF cur from 150 to 148.5kA, since it is reading 5.5T instead of 5.4 RF will change timing and reduce power. Leave RXL at -.015 and see what happens Result: plasma full length Got modulated neuts, short early marfe density rising through shot, sees modulation from rf Got 2MW from J, as requested. Outer strike is now on the floor early Next: Tweak nl04 program, gains, feedforward to try for steadier density |
| Feb 17 2011 11:24:33:420AM | 1110217015 | Steve Wolfe | Shot#15: Tweak nl04 program, gains, feedforward to try for steadier density. Integral gain from 1 to 2 Slow down ramp of RXL, get to -.015 at .65sec RF raising power, Aaron opens aperture to increase signal Result: plasma full length, still an early marfe density still sagging from .35 to .6, need more puff or more gain, or maybe less gain, the gas goes off in that range, could be the calibration. RF faulting on middle pulses. Next: extend pg3 puff at 50V to 0.6sec |
| Feb 17 2011 11:41:31:310AM | 1110217016 | Steve Wolfe | Shot#16: extend pg3 puff at 50V to 0.6sec Resist temptation to raise P gain Move final RXL level from -.015 to -.01 Result: plasma to 1.1sec, halfway through the RF. Density was actually dropping a little during the RF this time One big injection, may have come from J-port antenna. Otherwise, nice and steady. The gas is off after .6sec, Next: repeat and hope the injection goes away Maybe change RF timing? |
| Feb 17 2011 11:51:54:030AM | 1110217017 | Steve Wolfe | Shot#17:repeat and hope the injection goes away Move start of RF earlier by .1sec. Result: plasma to 1.5sec Marfe is a little stronger before BOF Dies during final RF pulse with J phase testing Next: Raise Ip to 1MA |
| Feb 17 2011 12:05:14:203PM | 1110217018 | Steve Wolfe | Shot#18:Raise Ip from 0.8 to 1MA Result: plasma full length Lookslike TCI lost a fringe, feedback ok density still sags before 1sec, comes back up Next: raise pg3 maint level to 30V, raise P gain |
| Feb 17 2011 12:20:07:160PM | 1110217019 | Steve Wolfe | Shot#19:raise pg3 maint level to 30V, raise P gain from 2 to 3. Consider dropping pg3 in seg1 to releave marfe, but hold off. plasma full length, density still drifting during modulated pulses Next: ip up to 1.2MA, P gain up some more |
| Feb 17 2011 12:35:58:967PM | 1110217020 | Steve Wolfe | Shot#20:Repeat 1MA, because DNB didn't fire last shot. Raise nl04 P gain from 3 to 5, hope it doesn't start oscillating Extend pg3 in seg2 to .8 at 50V drop seg1 pg3 from 60 to 50V This is crazy, hardly using feedback at all, could run better with feedforward alone! Result: plasma full to 1.55sec, Got 1.2MA after all; didn't hit apply? Density is better on this one, marfe is pretty much gone. Next: drop current back to 1MA, no other changes. |
| Feb 17 2011 12:49:03:613PM | 1110217021 | Steve Wolfe | Shot#21: Back to 1MA, try to pick up that point, hopefully with steadier density. Result: plasma full length, density ok, beginning to overshoot a little maybe, but better than it's been. Bit of an early marfe came back. RF looks good, except for last pulse. Next: back to 1.2MA, on purpose this time. |
| Feb 17 2011 01:09:37:520PM | 1110217022 | Steve Wolfe | Shot#22: Back to 1.2MA, no other PCS changes Result: disruption at .63 sec, during second rf pulse. no marfe, no early injection, but density seems to have fallen to 5e19 at that time. Could be a locked mode. Next: Play with nl04 some more |
| Feb 17 2011 01:18:19:337PM | 1110217023 | Steve Wolfe | Shot#23: Raise pg3 to 60V from .3 to .5sec Still trying to repeat 1.2MA Result: disrupts at 1.35sec, density much flatter during modulation, some overshoot early from the pg3 puff. Some bad rf pulses. No injections until the killer. There is a burst on the zmeter at .022sec, not seen on dalpha or CIII Next: Down to 600kA. |
| Feb 17 2011 01:30:02:930PM | 1110217024 | Steve Wolfe | Shot#24: Reduce Ip from 1.2MA to 0.6MA leave gas and nl04 program alone; probably should remove the extra pg3 between .3 and .5sec, but leave it for now. It didn't stay on in that interval on shot#23 anyway. Result: plasma full length, but marfing all the way through. J faulted all through, D and E were on for the last pulse. Next: try again at lower rf demand, lower the pg3 puff in seg2 |
| Feb 17 2011 01:43:43:133PM | 1110217025 | Steve Wolfe | Shot#25: lower the pg3 puff in seg2 to 45V before 0.8sec If Yijun can get the rf to stay on, the marfe may go away on its own, in which case I may have too low a density again. Result: plasma full length, still had a marfe, mostly gone by .65sec RF still not staying on well, maybe a little better than last time Density seems steadier, less overshoot. Next: Either try again or go to higher current, lower field (scan 2) |
| Feb 17 2011 01:57:09:037PM | 1110217026 | Steve Wolfe | Shot#26: Go to 5.1T, 1.0MA (scan 3) TF to 140.3kA, Ip to 1.0MA, no change in density or gas program. Result: plasma into rampdown 1.65sec All of Aaron's rf pulses look good, density has a little sag, gas is essentially off from .4 to .9sec Next: raise Ip from 1 to 1.2MA |
| Feb 17 2011 02:09:48:140PM | 1110217027 | Steve Wolfe | Shot#27: Repeat 1.0MA because beam didn't fire on 26 Increase pg3 to 50V between .3 and .8sec, see if that helps the density. Result: plasma still disrupting in rampdown, 1.62sec Nice regular modulation on neutrons, decreasing amplitude on the prad, which is a litle strange. Density seems a little more steady, increases during last RF pulse (higher power) Next: Raise Ip to 1.2MA |
| Feb 17 2011 02:23:43:750PM | 1110217028 | Steve Wolfe | Shot#28:Raise Ip to 1.2MA DNB still got no data on 27, and test shot failed. Josh suggested another test shot, but we will go ahead with real shot and see if it works on that. Result: Disruption at .645sec Density dropped again, another locked mode Need to put back the early gas and make it overshoot Next: do that |
| Feb 17 2011 02:38:21:810PM | 1110217029 | Steve Wolfe | Shot#29: Increase nl04 demand to 9e19 between .3 and .5sec Increase pg3 to 60V in the same interval. Result: plasma full length,marfe before .5sec, Density dropping during flattop, RF pulses spotty, some faulting early Next: repeat, try to improve density and rf |
| Feb 17 2011 02:52:18:893PM | 1110217030 | Steve Wolfe | Shot#30:repeat, try to improve density and rf delay I gain until .7sec, see if I'm getting screwed by the early overshoot winding up. Result: plasma to 1.7sec, still no puff after .6sec but density is flatter, but now it's too high. Gets to 9e19. Now I need to back down the pg3? Next: drop Ip to 800kA, remove early enhanced puff, turn off I gain |
| Feb 17 2011 03:07:10:817PM | 1110217031 | Steve Wolfe | Shot#31:drop Ip to 800kA, remove early enhanced puff and nl04 demand turn off Int gain on NL04 completely. Result: plasma full length, density around 8e19 but steady, except for the modulation. All pulses but the first look good. Getting small puffs into flattop. Next: Drop the current 600kA, also reduce the early pg3 in seg2 to reduce the density later. |
| Feb 17 2011 03:19:26:347PM | 1110217032 | Steve Wolfe | Shot#32:drop Ip to 600kA, reduce pg3 to 40V between 0.1 and 0.8sec Decreasing rf power request as well Result: plasma full length, nl04 is down to ~7.5 and pretty steady Most pulses ok. Next: repeat this shot, try lowering the density a little more |
| Feb 17 2011 03:37:24:797PM | 1110217033 | Steve Wolfe | Shot#33: try lowering the density a little more decrease pg3 from 40 to 30V from 0.1sec on Previous shot was actually at 800kA, reset this one for 600kA Check it this time! Reload from -1 and see that it's there this time. I don't understand how it could have gone back to 800, but probably the other changes from last shot were not entered either, so we'll have to see what happens with this. Result: plasma full length, and it really is 600kA this time. RF modulation not as good, density pretty flat, around 7e19 Actually puffing some through the flattop, looks like it's right around the target value. Density rises up to the target by 0.6sec, no early overshoot. Next: repeat again for better RF. No PCS changes this time. Still don't know where the previous load went wrong. |
| Feb 17 2011 03:47:03:770PM | 1110217034 | Steve Wolfe | Shot#34: repeat again for better RF. No PCS changes this time. Result: plasma full length, something of a marfe early and at 0.5 to 0.65sec Next: Repeat the target, but with steady RF |
| Feb 17 2011 04:02:16:710PM | 1110217035 | Steve Wolfe | Shot#35: Change of plans- raise current to 1MA and run steady RF, leave pg3 and nl04 program alone. It shouldn't marfe, and hopefully it won't lock. Verify that it's loaded. Result: plasma full length, steady rf, no injections density looks good and steady Next: Drop to 800kA |
| Feb 17 2011 04:15:00:897PM | 1110217036 | Steve Wolfe | Shot#36: Drop Ip to 800kA, no other PCS changes Result: plasma full length, steady rf, mostly density pretty steady between 0.7 and 0.8e20 One early injection arounf .25sec, otherwise clean Next: Go down to 600kA |
| Feb 17 2011 04:27:21:900PM | 1110217037 | Steve Wolfe | Shot#37: Drop Ip to 600kA, no other PCS changes Result: plasma full length, injection and marfe at 1.15sec Next: Up to 1.2MA, increase early density a little to try to avoid lm |
| Feb 17 2011 04:43:57:337PM | 1110217038 | Steve Wolfe | Shot#38: Up to 1.2MA, increase early density to 9e19 before .5sec to try to avoid lm Result: plasma full length, density is up to 8e19, rf drop out at 1.125sec. Neuts drop by a factor of more than two, No change in prad, density goes up a little at that time Looks like a bifurcation in the reactivity. Next: Go to 5.4T and stay at 1.2MA |
| Feb 17 2011 05:01:36:343PM | 1110217039 | Steve Wolfe | Shot#39: Go from 5.1 to 5.4T and stay at 1.2MA (TF to 148.5kA) No other PCS changes. Result: plasma full length, RF tripped out really early. Density steady at 8e19. FMIT#3 had a tube arc. Test shot failed. Next: Wukitch is going to look in the power room |
| Feb 17 2011 05:23:35:963PM | 1110217040 | Steve Wolfe | Shot#40: FMIT#3 is arcing outside the cavity someplace Will proceed with the run using D&E This will be a repeat at 1.2MA, 5.4T Result: plasma full length, injection around .54, near rf turn on, RF steady, possible I-mode after 1.1sec Breakdown is a tad late, hold off raising EF4 and keep fingers crossed. Next: Raise field to 5.6T (154kA) |
| Feb 17 2011 05:31:44:920PM | 1110217041 | Steve Wolfe | Shot#41: Raise field to 5.6T (154kA), keep Ip=1.2MA, no other PCS changes Result: Injection at .03sec, lots of runaways, 100+kA quasi-fizzle. Next: IC_EF4 to 1300 |
| Feb 17 2011 05:46:20:877PM | 1110217042 | Steve Wolfe | Shot#42: IC_EF4 from 1290 to 1300, TF still at 154kA (5.6T) And the bulb in the left hand projector just exploded Nothing wants to work past 17:00! But we'll try for another plasma or two anyway. Result: Early disruption Big injection at .17sec and .22sec No runaways, breakdown is earlier, but something must have come in Next: Go back to 5.4T and 0.6MA |
| Feb 17 2011 05:59:07:610PM | 1110217043 | Steve Wolfe | Shot#43: Go back to 5.4T and 0.6MA Import seg2 from 1110217037 and change TF to 148.5kA Result: plasma full length, small early marfe, Density is flat at 7.0e19, no injections, but D faulted out early, so only got 1MW. Clean breakdown and startup Next: will try one more shot to get this last point in the current scan. |
| Feb 17 2011 06:09:44:287PM | 1110217044 | Steve Wolfe | Shot#44: will try one more shot to get this last point in the current scan. Repeating 5.4T, 0.6MA No PCS changes, and this will be the last shot, no matter what. Result: plasma full length, early marfe and again at .5 and .6sec but rf mostly stays on at 2MW. Steady density around 7.5e19. That should be a keeper. END OF RUN |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:19:35:670AM | Test | Bad | EF1 Upper timing circuit |
| 2 | 08:28:28:517AM | Test | Ok | |
| 3 | 08:39:52:213AM | Test | Ok | |
| 4 | 08:47:15:063AM | Test | Ok | |
| 5 | 08:57:34:193AM | Test | Ok | |
| 6 | 09:05:22:113AM | Test | Ok | |
| 7 | 09:35:47:300AM | Test | Ok | |
| 8 | 09:43:20:343AM | Test | Ok | |
| 9 | 09:55:44:063AM | Test | Ok | |
| 10 | 10:08:43:330AM | Plasma | Ok | |
| 11 | 10:25:09:723AM | Plasma | Ok | |
| 12 | 10:38:38:760AM | Plasma | Ok | |
| 13 | 10:53:32:307AM | Plasma | Ok | |
| 14 | 11:05:58:490AM | Plasma | Ok | |
| 15 | 11:18:36:960AM | Plasma | Ok | |
| 16 | 11:33:12:107AM | Plasma | Ok | |
| 17 | 11:46:51:490AM | Plasma | Ok | |
| 18 | 12:00:06:417PM | Plasma | Ok | |
| 19 | 12:14:50:703PM | Plasma | Ok | |
| 20 | 12:28:58:870PM | Plasma | Ok | |
| 21 | 12:43:12:980PM | Plasma | Ok | |
| 22 | 12:58:25:353PM | Plasma | Ok | |
| 23 | 01:11:47:317PM | Plasma | Ok | |
| 24 | 01:25:06:960PM | Plasma | Ok | |
| 25 | 01:38:54:400PM | Plasma | Ok | |
| 26 | 01:52:15:343PM | Plasma | Ok | |
| 27 | 02:05:24:803PM | Plasma | Ok | |
| 28 | 02:19:56:497PM | Plasma | Ok | |
| 29 | 02:33:13:577PM | Plasma | Ok | |
| 30 | 02:46:36:687PM | Plasma | Ok | |
| 31 | 03:00:21:403PM | Plasma | Ok | |
| 32 | 03:13:38:433PM | Plasma | Ok | |
| 33 | 03:29:42:520PM | Plasma | Ok | |
| 34 | 03:43:16:410PM | Plasma | Ok | |
| 35 | 03:56:44:780PM | Plasma | Ok | |
| 36 | 04:10:25:297PM | Plasma | Ok | |
| 37 | 04:23:17:317PM | Plasma | Ok | |
| 38 | 04:37:30:393PM | Plasma | Ok | |
| 39 | 04:52:02:337PM | Plasma | Ok | |
| 40 | 05:14:24:497PM | Plasma | Ok | |
| 41 | 05:27:40:540PM | Plasma | Ok | |
| 42 | 05:40:19:140PM | Plasma | Ok | |
| 43 | 05:52:41:783PM | Plasma | Ok | |
| 44 | 06:05:03:920PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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