| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Ian Faust,Mark Chilenski |
| Physics operator(s): | Bill Rowan |
| Engineering operator(s): | Bill Cochran,Sam Pierson,Bill Byford |
| Engineering Operator Run Comment |
| MP710 (0.7) - Impurity transport in non-inductive plasmas |
| Session Leader Plans |
| Entered: Sep 13 2012 02:27:18:283PM |
| Author: Mark Chilenski |
| Session leader plan for afternoon run 1120914 (Friday, September 14, 2012)
The objective of this run is to explore the transport of injected CaF2 in a variety of I-mode conditions in order to augment the scan already performed in EDA H-mode and to investigate the change in impurity transport around the L-I threshold. Basic Conditions: B=5.4T (may change to 5.8T if we need to reduce sawteeth and/or if CECE manages to get their modification complete) Main species: D2 Required Diagnostics: CaF2 LBO HiReX-SR with appropriate Ca crystal configuration, set for 6ms time resolution XEUS LoWEUS Thomson scattering (fast) TCI ECE (all systems) Desired Diagnostics: PCI (core turbulence) CECE fluctuation reflectometry Required Systems: Cryopump ICRF: all antennas, up to 4.5 MW available. Waveform unless otherwise specified: ramp from 1.5MW to specified power from 0.5s to 0.65s, then sustain specified power from 0.65s to 1.5s. Ar/Ne mixture as needed by ICRF and HiReX-SR He as needed for Ken Liao's piggyback experiment Shot Sequence: Reference shape: 1120907029 (or other similar recent, successful I-mode), but different target current and ICRF power as specified below. Assume successful locked mode obtained during Ian's (MP710) run in the morning, don't need to repeat. 1.) Power threshold verification: Ip=1.0MA, nl_04=0.7e20m^-2. Ramp ICRF power from 1MW (at 0.5s) to 4.5MW (at 1.5s) to verify location of L-I (and possibly I-H) transition. 2.) Ip=1.0MA, nl_04=0.7e20m^-2. Constant ICRF power just below L-I threshold: nominally 1.8MW unless part (1) indicates otherwise. 3.) Ip=1.0MA, nl_04-0.7e20m^-2. Constant ICRF power just above L-I threshold: nominally 2.7MW unless part (1) indicates otherwise. 4.) Ip=1.0MA, nl_04=0.7e20m^-2. Constant ICRF power well above L-I threshold (but below I-H threshold): nominally 4MW unless part (1) indicates otherwise. 5.) Ip=1.3MA, nl_04=0.7e20m^-2. Ramp ICRF power from 1MW to 4.5MW to verify location of L-I (and possibly I-H) transition. 6.) Ip=1.3MA, nl_04=0.7e20m^-2. Constant ICRF power just below L-I threshold: nominally 2.3MW unless part (5) indicates otherwise. 7.) Ip=1.3MA, nl_04=0.7e20m^-2. Constant ICRF power just above L-I threshold: nominally 3.5MW unless part (5) indicates otherwise. 8.) Ip=1.3MA, nl_04=0.7e20m^-2. Constant ICRF power well above L-I threshold (but below I-H threshold): nominally 4MW unless part (5) indicates otherwise. |
| Entered: Sep 13 2012 04:01:20:440PM |
| Author: Ian Faust |
| Goal:
Observe and diagnose plasmas in which known non-recycling impurities (Calcium) are injected into a tokamak plasma with reduced ware-pinch (increased non-inductive current drive). Observe sawtooth-free impurity transport in the core. Utilize 47kV beam to diagnose Q profile utilizing MSE. Discharge Plan: Starting at 8am, assume that power-scan follows LH conditioning for the day. Provided locked-mode and shrinking plasma are achieved before in the week, those plasmas will be used as references. Step 1) Run LH power at 200 kW forward power. Use 75 degree phasing, example discharge from 1120710023 . Run for 1s starting at .7s. LBO injections at [.9 ,1.1, 1.3,1.5], while impurity confinement time is low, this provides good baseline and conservation of slide. Extend flat-top to insure LH pulse is completely in flat top (t=1.75). Last .05 provides MSE post LH calibration ohmic phase. Ip=500 kA, Bt = 5.4 T. Change HiRex Timing to 2ms. Goal of this plasma is to achieve nl_04 = 4e19, and will probably not be achieved at first attempt. Use cryo in USN in order to assist and control density. When parameters requested are achieved, move to step 2. Allocate 2-3 shots for this purpose. In the case of MHD in continue plan as laid out, the reduction of power should reduce MHD drive. Add up to 1MW ICRF (J-ant) to insure ion temperature measurements on hydrogen like argon spectrum as needed. Total Use: 2-3 plasmas Step 2) Increase LH power at 200kW forward power increments while maintaining target plasma set in step 2. LH parameters (pulse length, phasing) stay the same, and same goes for HiReX and LBO. Achieve 2 plasmas per scenario for statistical purposes. This will require 6-8 plasmas (400,600,800 kW). At high powers, if MHD m=2 develops, retry with added ICRF. Total shot use: 8-11 plasmas. Step 3) Achieve 'control' discharge. Remove LHCD. (ohmic baseline) Rerun step 2). x2 plasmas. Shot to be done tomorrow. total use: 10-13 discharges Step 4) achieve a locked mode (reference to be determined from thursday run) (max x2 plasmas). Set integration time to HiReX to 20 ms. Try to reduce density as much as possible, reference shot has locked mode at nl_04 ~8e19. Ca injection into end of locked mode. total use 11-14 plasmas Step 5) IF extra time (highly unlikely), Plasma Size Scan for MSE calibration 1120608011. (MAX x2 attempts) Steps are inverse importance based on number. It is likely that all will not be completed, but will attempt to get as far as possible. Diagnostics: Mission Critical- Thomson Scattering, HiRex with Ca crystal. LBO with CaF2 slide. MSE and DNB. XTOMO, polarimeter and HXR. Z effective systems. TCI. Secondary Diagnostics (still required) PCI, Magnetics, Reflectometery for fluctuations, CECE. AXUV diodes. ECE diagnostics. Tertiary Diagnostics: All passive diagnostics that do not require modifications to said run plan. Other systems: ICRF CRYO (density control), if available. If not, results from 1120912 show density will be fine. LH DNB Please consult I.Faust or L.Delgado-Aparicio with any questions. |
| Physics Operators Plans |
| Entered: Sep 13 2012 02:37:27:973PM |
| Author: Bill Rowan |
| Engineering setup and PhysOp Plan for 2012 Sep 14, Run 1120914.
NOTE: RUN BEGINS AT 08:00 AND ENDS AT 18:00 MP710 (0.7) - Impurity transport in non-inductive plasmas 8am to 2pm SL: Ian Faust Required systems and diagnostics: LH, DNB, MSE, LBO (CaF2), cryopump, ICRF Thomson Scattering, HiRex with Ca crystal, XTOMO, polarimeter, HXR. Z effective systems. TCI. Secondary Diagnostics (still required) PCI, Magnetics, Reflectometery for fluctuations, CECE. AXUV diodes. ECE diagnostics. Tertiary Diagnostics: All passive diagnostics that do not require modifications to said run plan. MP713 (0.5) - Impurity Transport in H-modes of Varying Collisionality 2pm to 6pm SL: Mark Chilenski Required systems: LBO, ... PO: Bill Rowan ----------------- Engineering Setup ----------------- Run begins at 08:00 and ends at 18:00 Power systems as on:1120710023 (forward field shot, modify for reversed field) A-coil configuration: -Dtop +Dbot +Jtop -Jbot; Hybrid enabled (reversed field configuration) Gas setup: Fill B-Top with 6 psi D2 Hybrid enabled (PG4) Fill B-side lower with mixture 0.5 psi Ar + 3.5 psi Ne Hybrid DISABLED (PG1) Leave B-side upper as is Hybrid DISABLED (PG2) Fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) Fill H-bottom with 10 psi He4 Hybrid enabled (PG5) Fill NINJA F-port with 8 psi D2 Hybrid DISABLED Fill NINJA C-port with 8 psi D2 Hybrid DISABLED Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus/LoWEUS Leave z-bolo shutter as is (should be open) Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): yes ICRF(yes/no): yes LH(yes/no): yes Cryopump (yes/no): yes DNB (yes/no): yes Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s ----------------------------- PO Plan ----------------------------- MP 710 Use 1120710023 as reference for step 1 and import into segment 2 Modify for reversed field Decrease IP from 0.530 MA to 0.500 MA Increase nl_04 from 0.32e+20 to 0.4e+20 Select recent segment 1 and adjust prefill for cryopump, import into segment 1 Acquire locked mode from Thursday's run and load into segement 3 Use 1120612001 as reference for step 5. The MSE expert replaced the choice of the SL which was 1120608011 Load into segment 4 Modify for reversed field MP 713 Use 1120907028 as a reference shot and import into segment 2. This is Amanda's trophy shot. If there are problems with this shot, then other references are 1120829014 and 1120830003. |
| Session Leader Summaries |
| Entered: Sep 14 2012 06:05:15:967PM |
| Author: Ian Faust |
| 22 Shots completed in 6 hrs (16:36 minutes per shot). This included 2 Ohmic
baseline shots, (1 500kA, 1 600kA), 2 Locked-Mode calibration shots, 1 MSE calibration shot, 1 fizzle (due to cryo) and 16 LH into plasma. Initially, attempts were made to increase HiReX-Sr H-like Ca signal, but the low density and moderate temperatures made this difficult. By the end of this trial/calibration period, calcium injections were large enough to perturb the plasma current itself, raising Zeff by ~1.5x and deleteriously cooling the edge plasma. Realizing that the original plasmas proved to be too elusive for proper characterization with HiReX, the experiment moved to step two with several changes. Density control proved to be the largest problem throughout the day. It was determined for shots 9-15 to work with a more stable 600kA nl_04 ~.45e20 plasma to better moderate the density and try to increase the HiReX signal. One complete scan in LH power was made at this condition. The 200 kW LH condition and ohmic discharges proved to contain a weird impurity confinement response, which might muddle these data sets at 600 kA. At this point, calibration shots were taken as following the SL plan. These went without a hitch, and will prove very useful for future use. The SL plan fully exhausted (to the best of our ability/ knowledge of the data set) with 1:30 remaining, which proved that the original experiment (originally conceived for 1/2 run day) was well designed (with no little help by the P.O.). The extensive set of 500kA, low density plasmas was still incomplete. A good target was set to complete this data set. The last 1:30 was spent to expand this group, specifically at its boundaries. The last plasmas provided the first zero-loop voltage plasmas of the campaign. In the end, a scan of Vloop from 0-.9V was completed at 500kA, and a smaller range but more refined set was taken at 600kA. The lack of any significant MHD response lends me to think that the reversal of field is likely the cause for this achievement. Given this correlation, I believe that the MHD behavior seen in forward field is a manifestation of the error fields affecting the fast electrons. Overall, the runday was bittersweet. The lack of good HiRex profiles will likely make specific charge state modeling difficult. However, great data sets with good DNB/MSE will be extremely useful for characterizations using the XTOMO and other systems. |
| Entered: Sep 15 2012 03:40:42:707PM |
| Author: Mark Chilenski |
| 14 shots completed in this half day. No fizzles, 3 early disruptions.
The objective of this run was to use LBO to investigate core transport in plasmas near either side of the L-I threshold. The high power, strong I-mode cases originally called for in the run plan were prioritized lower than the threshold cases, and we ended up not having time to obtain those strong I-mode cases. There were some issues with density control that made the threshold move around a bit and may complicate our analysis. Shot summary is as follows: 024 Attempt to ramp ICRF power from 1MW to 4.5MW in the 1.0MA target. Ended up with too much neon to get an I-mode, and field was programmed too high for CECE. 025 Successful ICRF ramp (1MW to 4.5MW) at 1.0MA target, now with correct field and neon. Transitioned to I-mode around 2.3MW. 026 Attempt to get marginal 1.0MA L-mode with 2.0MW ICRF. Too marginal: got a couple of I-modes. LBO also too small. 027 Successful marginal 1.0MA L-mode with 1.8MW ICRF. Density control a bit lacking: tried this case again with different density programming for shot 037. 028 Attempt to get marginal 1.0MA I-mode with 2.2MW ICRF. Too marginal: LBO knocks it out. 029 Successful marginal 1.0MA I-mode with 2.6MW ICRF. Nice steady-state shot. 030 Attempt to ramp ICRF power from 1MW to 4.5MW at 1.3MA target. Density is too low: locks and disrupts. 031 Successful ICRF ramp (2MW to 4.5MW) at 1.3MA target. 032 Attempt to get marginal 1.3MA L-mode with 1.8MW ICRF. Density is too low: locks and disrupts. 033 Attempt to get marginal 1.3MA L-mode with 1.8MW ICRF. Density is too low: locks and disrupts. 034 Successful marginal 1.3MA L-mode with 1.8MW ICRF. 035 Attempt to get marginal 1.3MA I-mode with 3.0MW ICRF. Too marginal: pops in and out. LBO too small. 036 Successful marginal 1.3MA I-mode with 3.5MW ICRF. 037 Repeat of marginal 1.0MA I-mode with 1.8MW ICRF, trying for better density control. Density control about the same, not as nice as 029. |
| Physics Operator Summaries |
| Entered: Sep 17 2012 09:04:10:960AM |
| Author: Bill Rowan |
| Physics Operator Summary
The goal of the run was to execute MP710 "Impurity transport in non-inductive plasmas," SL Ian Faust and MP713 "Impurity Transport in H-modes of Varying Collisionality," SL Mark Chilenski. These were both intended to acquire data for thesis. The cryo was used for both of the MPs. Segment 1 was taken from segment 1 of 1120913037. This was labelled as a non-cryo startup. Simply increased the prefill from 21 ms to 42 ms. Worked throughout the day. There was one fizzle, but that was due to high pressure caused by a cryopump burp. This was an extended run and started at 8 am and ended at 6 pm. The shots for MP 710 were based on 1120710023. This reference shot is from the forward field portion of this run campaign. PCS mods were made to tailor the shot to reversed field following the standard prescription. LH performed successfully almost from the first shot. Loop voltage of 0 was obtained. An inner wall limited sweep of the right gap was performed for spatial callibration of MSE. The shot in this run was 1120914015, and it was based on 1120612001. Worked perfectly. A locked mode attempt was made on shots 1120914016 and 017. It was based on 1120913012. The current prescription for the locked mode shot does not produce the long locked period of prescriptions used earlier in this campaign. Same result for run 1120913. Those who are to use the shots for calibration of HiRex accepted the shots as adequate. The shots for MP 713 were based on 1120907028. This is Amanda's trophy shot (see SL record for run 1120907), and so we were confident of it. Using it, I-modes were achieved in this run. There were some problems with feedback control of the density. Irby's iscope (tci_feedback.ifb) clearly showed the problem. Wolfe's suggestion regarding the use of PG3 was also useful. The density oscillations were reduced but not completely removed. Score Card 35 plasmas 02 engineering shots, one data system test shot, one cryo failure 37 total |
| Session Leader Comments | |||
| Sep 14 2012 08:13:59:807AM | 1120914002 | Ian Faust | 517 kA shot. Bill was worried, but it went through alright.
50Hz TS looks good, density looks good, almost a steady 4e19 nl_04. Trips in LH and 400 kW Net. (Way to go guys!). B-side lower was not enabled on this shot (hirex?) |
| Sep 14 2012 08:32:10:433AM | 1120914003 | Ian Faust | Overshoot on Ip is causing problems for ohmic baseline for MSE.
HiRex has not a complete environment. Vloop change is very apparent on this shot, what is causing the LH faults? Cell Access for digitizer stuff of DNB/ HireX. |
| Sep 14 2012 08:58:01:210AM | 1120914004 | Ian Faust | Clean RF trace, Core Te greater that 3keV (TS). Liking 3e19 nl_04 much better (for lower loop voltage).
Vloop goes near .2V.... (at 400kW LH). Reflections are a little high. Can't see any MHD (as of yet). Next shot attempt the same. Get good HiReX and then move to higher power. This segment is taking longer than expected, but shots are running faster. Still no DNB data. |
| Sep 14 2012 08:58:29:113AM | 1120914005 | Ian Faust | No Plasma.
|
| Sep 14 2012 09:39:53:557AM | 1120914006 | Ian Faust | Still Questions about density control. Running limbo as it is, it is tough to keep that density constant.
Greg brought up points that the DPS might not be set properly after the typical flat top, which might be changing plamsa conditions after 1.5. We will still be hammering at this setting till we get it right. This might be a carry over from the example shot 1120710023. |
| Sep 14 2012 09:53:59:137AM | 1120914007 | Ian Faust | Loop voltage drop was good initially, but it looks like impurity injection at 1s caused some change in the Vloop in the wrong way. Unless spectroscopy operator says there is an injection, is the spot size too big????
Density falls after LH start at a precipitious rate. I worry that it is changing too much to be useful. Still debating whether to run at 4e19 nl_04 just to play it safe... |
| Sep 14 2012 10:22:19:607AM | 1120914009 | Ian Faust | Cross over is earlier...
Injections preturbing fast electrons, seen on ECE, HXR and loop voltage. Similar to what was seen on the previous 1120710 runday. This is going to cost us in overall scan range, but at least these plasmas are a little more stable. |
| Sep 14 2012 10:43:29:700AM | 1120914010 | Ian Faust | 800 kW LH. Pertubative effects can be seen on Vloop and Ip due to the
injections. While this might be interesting for measuring Zeff effects on LHCD current redistribution, this might be wreaking havoc with the dataset. Try again with a slightly lower density, I am contemplating ICRF if the scan is completed early (time still for locked mode ect). We shall see. |
| Sep 14 2012 11:00:12:633AM | 1120914011 | Ian Faust | Less size in the injections really allowed for a less perturbation on the Ip/Vloop.
Trips in the LH trace. Reduction of Sawteeth much earlier in the plasma as compared to shot 10. Next shot 200kW net LH. |
| Sep 14 2012 11:09:12:797AM | 1120914012 | Ian Faust | Come to find out that HiReX data for H-like Ca looks deplorable.
Got 212.5 kW LH. Try one more time and then attempt some ohmic discharges. Vloop ~.8V. WE are now sitting on a factor ~3 is change in vloop. |
| Sep 14 2012 11:31:26:390AM | 1120914013 | Ian Faust | Weird impurity business screwed with the injections on this, and the last shot. This explains the h-alpha 'transitions' that are seen, as to what is causing them? who knows....
Trying ohmic, everything we want from 200 kW LH, without the LH and more loop voltage. |
| Sep 14 2012 11:52:28:130AM | 1120914014 | Ian Faust | Ohmic shot still has weird H-alpha ans SXR. Not sure what is going on... |
| Sep 14 2012 11:53:52:450AM | 1120914015 | Ian Faust | Shrinking plasma for MSE calib.
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| Sep 14 2012 12:07:19:480PM | 1120914016 | Ian Faust | Locked mode attempt.
Disruption at .7s (Would have won this bet.) Try again. |
| Sep 14 2012 12:20:54:713PM | 1120914017 | Ian Faust | Plasma Lasts to .75s Locked Mode.
|
| Sep 14 2012 12:38:42:127PM | 1120914018 | Ian Faust | Went back to shot 004 and kicked the power to 800kA.
ZERO LOOP VOLTAGE! |
| Sep 14 2012 12:54:43:740PM | 1120914019 | Ian Faust | LH tripping kicked it out of zero loop voltage.
I want a full length with a clean trace. |
| Sep 14 2012 01:28:20:377PM | 1120914021 | Ian Faust | Full length... Loop voltage slightly above zero, density not bad. Good Trophy? Next shot Ohmic. |
| Sep 14 2012 01:59:10:727PM | 1120914022 | Ian Faust | Ohmic shot has worse density control than the others. It will be a good comparison. The H-alpha is dubious but we will see....
|
| Sep 14 2012 02:02:50:630PM | 1120914023 | Ian Faust | 400 kW LH. |
| Sep 14 2012 02:30:42:870PM | 1120914024 | Mark Chilenski | Attempt for RF ramp from 1MW to 4.5MW at 1.0MA to verify location of threshold.
Next: Repeat with lower field, lower target density and less neon/argon. |
| Sep 14 2012 02:48:05:160PM | 1120914025 | Mark Chilenski | Attempt for RF ramp from 1MW to 4MW at 1.0MA to verify location of threshold.
Result: Good ramp. Transitions to I-mode around 2.3-2.4MW. Next: Steady RF at 2.0MW (try for L-mode) |
| Sep 14 2012 03:03:27:300PM | 1120914026 | Mark Chilenski | Attempt for steady 2.0MW RF at 1.0MA to get marginal L-mode.
Result: Popped into I-mode a couple of times. Next: Try for bigger LBO and better density control at 1.8MW. |
| Sep 14 2012 03:27:23:187PM | 1120914027 | Mark Chilenski | Attempt for steady 1.8MW RF at 1.0MA to get marginal L-mode.
Result: Stays in L-mode. Next: Slight change to ICRF waveform. Go to 2.2MW: try for marginal I-mode. |
| Sep 14 2012 03:39:09:413PM | 1120914028 | Mark Chilenski | Attempt for steady 2.2MW RF at 1.0MA to get marginal I-mode.
Result: It was certainly marginal: LBO knocks it out. Next: Try to get a bit less marginal with 2.6MW RF. |
| Sep 14 2012 03:55:32:023PM | 1120914029 | Mark Chilenski | Attempt for steady 2.6MW RF at 1.0MA to get marginal I-mode.
Result: Looks good. Next: Change to 1.3MA. Ramp RF from 1MW to 4MW to verify threshold. |
| Sep 14 2012 04:18:53:920PM | 1120914030 | Mark Chilenski | Attempt for RF ramp from 1MW to 4MW at 1.3MA to check threshold.
Result: Disrupted early. Next: Repeat ramp. Change target nl04 to 0.85. Change start of RF ramp to 1.5MW. |
| Sep 14 2012 04:38:44:780PM | 1120914031 | Mark Chilenski | Attempt for RF ramp from 1.5MW to 4MW at 1.3MA to check threshold.
Result: Good ramp. Transition into weak I-mode around 2.3MW, though density is minimal there. Next: Steady RF at 1.8MW, still at 1.3MA. |
| Sep 14 2012 04:46:55:190PM | 1120914032 | Mark Chilenski | Attempt for steady 1.8MW RF at 1.3MA.
Result: Disrupted early. Next: Try again with target nl04 of 0.95. |
| Sep 14 2012 04:59:52:340PM | 1120914033 | Mark Chilenski | Attempt for steady 1.8MW RF at 1.3MA, with higher nl04.
Result: Disrupted early. Next: Try again? |
| Sep 14 2012 05:20:28:647PM | 1120914034 | Mark Chilenski | Attempt for steady 1.8MW RF at 1.3MA (marginal L-mode), with better nl04.
Result: Looks good. Stays in L-mode. Next: Go to 3.0MW to get I-mode at 1.3MA. |
| Sep 14 2012 05:36:10:467PM | 1120914035 | Mark Chilenski | Attempt for steady 3.0MW RF at 1.3MA (I-mode).
Result: Too marginal, bad LBO. Next: Increase power to 3.5MW. |
| Sep 14 2012 05:53:12:057PM | 1120914036 | Mark Chilenski | Attempt for steady 3.5MW RF at 1.3MA (I-mode).
Result: I-mode obtained. Next: Repeat 1.0MA marginal L-mode with better density control (1.0MA with 1.8MW). |
| Sep 14 2012 06:07:54:280PM | 1120914037 | Mark Chilenski | Attempt for steady 1.8MW RF at 1.0MA (L-mode).
Result: Looks good. Next: Done. |
| Physics Operator Comments | |||
| Sep 14 2012 07:45:08:800AM | Bill Rowan | Load from 1120913037
This is for segment 01(breakdown) and for segment 04 (locked mode) prefill increased to 42 ms for cryo ending at 0.5 s Import 1120710023 segment 2 into segment 2 Modify for reversed field Import 1120612001 segment 3 into segment 3 Modify for reversed field Move TF start time from -1.0 to -1.1 s for polarimeter Changed segment 04 locked mode loaded 1120913012 and changed pg1 to 0.3 s to 0.5 s Changed fill B-side lower to 1 psi Argon | |
| Sep 14 2012 07:58:39:040AM | 1120914001 | Bill Rowan | 001. Data system test shot.
Needed because various diagnostic test shots did not work earlier in the am. |
| Sep 14 2012 08:28:47:140AM | 1120914002 | Bill Rowan | 002.
nl_04 = 0.42e+20 ip = 0.517 MA next shot enable b-side lower PG1 PG1 verified to be from 0.3 to 0.4 s small change in IP programming to avoid overshoot IP = 0.450 at 0.1 and 0.500 at 0.2. Will not go into segment 1 with this change |
| Sep 14 2012 08:48:20:730AM | 1120914004 | Bill Rowan | 004.
plasma full length next shot H-bot 0.9 to 0.930 |
| Sep 14 2012 09:15:25:940AM | 1120914005 | Bill Rowan | 005.
Fizzle looked like a cryo problem. pressure was quite high at "breakdown" next shot no pcs changes delay due to alternator problem -- ramped down to 1500 |
| Sep 14 2012 09:41:48:327AM | 1120914006 | Bill Rowan | 006.
plasma full length next shot. moved all setpoint to 1.7 small change in nl_04 changed to get rid densiy change |
| Sep 14 2012 09:53:39:073AM | 1120914007 | Bill Rowan | 007.
plasma full length next shot moved ic_ef4u end from 1.5 to 1.7. missed on previous check |
| Sep 14 2012 10:13:37:190AM | 1120914008 | Bill Rowan | 008.
plasma full length next shot. rcur reduced by 1.5 mm at 1.6s to remove slight excursion in right gap h-bottom pulse change to 25 ms duration added pg1: 50 ms starting at 1.0 ip increased to 600 kA nl_04 increased to 4e+19 |
| Sep 14 2012 10:40:47:957AM | 1120914010 | Bill Rowan | 010.
plasma nl_04 slightly flatter prior to LH next shot reduce nl_04 demand from 0.4e+20 to 0.37e+20 |
| Sep 14 2012 10:54:49:170AM | 1120914011 | Bill Rowan | 011.
plasma next shot no pcs changes |
| Sep 14 2012 11:03:52:510AM | 1120914012 | Bill Rowan | 012
plasma next shot no pcs changes |
| Sep 14 2012 11:20:27:080AM | 1120914013 | Bill Rowan | 013.
plasma next shot no pcs changes |
| Sep 14 2012 11:43:27:810AM | 1120914014 | Bill Rowan | 014.
plasma Next shot Change to sweep for mse. Reference shot 1120612001. Turn off segment 2 and turn on sebment 3 h-bottom: 25 ms pulse starting at 0.9s disable b-side lower, pg1 |
| Sep 14 2012 12:01:06:863PM | 1120914015 | Bill Rowan | 015.
plasma next shot. enable b-side lower Locked mode shot attempt: turn off segment 3 and turn on segment 4 Reference shot: 1120913012 disable h-bottom |
| Sep 14 2012 12:15:25:880PM | 1120914016 | Bill Rowan | 016.
plasma Disruption near 0.7 s locked as required next shot. nl_04 prop gain from 3 to 4 |
| Sep 14 2012 12:35:34:970PM | 1120914017 | Bill Rowan | 017.
plasma next shot returning to LH discharges segment 04 off segment 02 on reload 1120914004 h-bottom on at 0.9 for 25 ms flattened the early density -- before LH enabled h-bottom |
| Sep 14 2012 12:47:32:563PM | 1120914018 | Bill Rowan | 018.
plasma disruption at 1.2s vl ~ 0 injection? next shot Increased some end times to 1.7 |
| Sep 14 2012 01:03:03:223PM | 1120914019 | Bill Rowan | 019,
plasma oscillations near 1.3 probably due to LH Next shot. increase the outer gap by 3 mm. Reduce rcur by 1.5 mm |
| Sep 14 2012 01:14:02:733PM | 1120914020 | Bill Rowan | 020.
plasma Next shot. no pcs changes |
| Sep 14 2012 01:27:46:770PM | 1120914021 | Bill Rowan | 021.
plasma next shot. no pcs changes |
| Sep 14 2012 01:44:14:290PM | 1120914022 | Bill Rowan | 022.
plasma next shot. no pcs changes |
| Sep 14 2012 02:10:56:853PM | 1120914023 | Bill Rowan | 023.
plasma next shot Change to MP 713 Import 1120907028 segment 02 in segment 02 Fill bside lower with a mixture 0.5 posi Ar + 3.5 PSI Ne |
| Sep 14 2012 02:33:43:897PM | 1120914024 | Bill Rowan | 024.
plasma next shot. H-bottom changed: 25 ms puff starting at 0.9 s pg1: 100 ms puff at 0.35 s reduce TF current from 162500 to 153326; BT from 5.77 to 5.45 T nl_04 target from 0.8 to 0.7 |
| Sep 14 2012 02:47:03:787PM | 1120914025 | Bill Rowan | 025.
plasma bt = 5.45 T SL claims i-mode at 0.8 s next shot. repeat |
| Sep 14 2012 03:08:09:050PM | 1120914026 | Bill Rowan | 026.
plasma next shot. No pcs changes |
| Sep 14 2012 03:21:20:813PM | 1120914027 | Bill Rowan | 027.
plasma next shot. oscillating density so: decrease proportional gain from 4 to 3.5 pg3 to 15% starting at 0.5 |
| Sep 14 2012 03:58:48:110PM | 1120914028 | Bill Rowan | 028.
plasma next shot change left gap: 1.0 at 1.4 to 0.6 at 1.5 decrease proportional gain from 3.5 to 3 |
| Sep 14 2012 03:58:32:620PM | 1120914029 | Bill Rowan | 029.
plasma next shot IP = 1.3 MA tweaked the left gap scan decrease proportional gain from 3 to 2.5 |
| Sep 14 2012 04:18:13:160PM | 1120914030 | Bill Rowan | 030.
plasma apparent locked mode at 0.8 (sawtooth quench) next shot. nl_04 = 0.85e+20 |
| Sep 14 2012 04:33:07:113PM | 1120914031 | Bill Rowan | 031.
plasma next shot increase outer gap by 2 mm at 1.5 |
| Sep 14 2012 04:47:56:263PM | 1120914032 | Bill Rowan | 032.
plasma disruption at 0.8 still looks like a locked mode to me next shot increase nl_04 to 0.95e+20 |
| Sep 14 2012 05:20:28:280PM | 1120914034 | Bill Rowan | 034.
plasma next shot no pcs changes |
| Sep 14 2012 05:53:56:623PM | 1120914036 | Bill Rowan | 036.
plasma next shot reload 1120914029 |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 07:52:48:367AM | Test | Ok | |
| 2 | 08:07:13:863AM | Plasma | Ok | |
| 3 | 08:20:36:633AM | Plasma | Ok | |
| 4 | 08:37:54:737AM | Plasma | Ok | |
| 5 | 08:56:10:710AM | Plasma | Ok | |
| 6 | 09:23:07:577AM | Plasma | Ok | |
| 7 | 09:43:25:087AM | Plasma | Ok | |
| 8 | 09:56:54:470AM | Plasma | Ok | |
| 9 | 10:14:20:813AM | Plasma | Ok | |
| 10 | 10:28:19:920AM | Plasma | Ok | |
| 11 | 10:44:23:173AM | Plasma | Ok | |
| 12 | 10:58:59:063AM | Plasma | Ok | |
| 13 | 11:18:02:753AM | Plasma | Ok | |
| 14 | 11:36:04:700AM | Plasma | Ok | |
| 15 | 11:49:50:020AM | Plasma | Ok | |
| 16 | 12:04:20:430PM | Plasma | Ok | |
| 17 | 12:17:40:437PM | Plasma | Ok | |
| 18 | 12:34:16:307PM | Plasma | Ok | |
| 19 | 12:49:05:710PM | Plasma | Ok | |
| 20 | 01:03:54:090PM | Plasma | Ok | |
| 21 | 01:22:19:177PM | Plasma | Ok | |
| 22 | 01:39:50:507PM | Plasma | Ok | |
| 23 | 02:02:40:560PM | Plasma | Ok | |
| 24 | 02:21:19:637PM | Plasma | Ok | |
| 25 | 02:36:41:400PM | Plasma | Ok | |
| 26 | 02:54:50:540PM | Plasma | Ok | |
| 27 | 03:16:29:960PM | Plasma | Ok | |
| 28 | 03:31:38:360PM | Plasma | Ok | |
| 29 | 03:48:47:497PM | Plasma | Ok | |
| 30 | 04:09:29:393PM | Plasma | Ok | |
| 31 | 04:25:44:260PM | Plasma | Ok | |
| 32 | 04:42:21:160PM | Plasma | Ok | |
| 33 | 04:56:42:307PM | Plasma | Ok | |
| 34 | 05:12:50:137PM | Plasma | Ok | |
| 35 | 05:26:03:137PM | Plasma | Ok | |
| 36 | 05:44:11:557PM | Plasma | Ok | |
| 37 | 06:00:50:010PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sep 14 2012 07:52:27:940AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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