| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Roman Ochoukov |
| Physics operator(s): | Ron Parker |
| Engineering operator(s): | Andy Pfeiffer,Bill Cochran,Gary Dekow |
| Engineering Operator Run Comment |
| This run is the continuation of MP558 SL Roman PO Parker |
| Session Leader Plans |
| Entered: Aug 31 2009 07:09:21:567PM |
| Author: Roman Ochoukov |
| /////////////////////////////////////////////////////////////////////////////
This run is the continuation of MP558 (Characterization of ICRF induced sheaths). This part of MP558 will be performed immediately after an overnight boronization to compare with the results obtained on Friday, Aug. 28th/2009. Start with a regular 1.0 MA discharge, same as 1090828005: Bt = 5.4 T, nl_04 = 0.8e20 right gap ~1.0 cm, elongation ~1.6. Run ICRF in a staircase form starting with the D and followed by E, with J turned on at all times. The RF steps are 0.5, 1.0, and 1.5 MW per step, similar to shot 1090828025. Depending on the results, may use ramping RF power waveforms. First we would like to obtain steady H modes at 1.0, 0.8, and 1.2 MA. The previous run couldn't not produce long steady H modes that could be compared to RF heated L modes (obtained previously). The main goal of the run is to scan magnetic field lines poloidally along the ICRF limiter tiles of the D antenna to determine the source of the most intense rectified voltages. The initial scan (on Friday) revealed the highest voltages when Bt = 5.6-5.8 T and I = 1.0 MA. This time we would like to extend the poloidal sweep by increasing the current and lowering the Bt field (q_edge close to 3 if possible). If time permits then scan the outer gap between 0.5 and 2 cm at const current, Bt, and nl_04 --> 4 shots May change the order of some scans depending on the results from the emissive, Katsumata, and bdot probes. /////////////////////////////////////////////////////////////////////////// |
| Physics Operators Plans |
| Entered: Aug 31 2009 05:31:52:730PM |
| Author: Ron Parker |
| Engineering Setup for Run 1090901
----------------------------------- MP558 - Characterization of ICRF sheaths (repeat with fresh boronization) SL: Ochoukov PO: Parker Run begins at 9:00 and ends at 17:00 Power systems as on: 1090828005 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) fill B-side upper with 40 psi D2 Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) Leave NINJA fill as is, DISABLED Enable gate valves and shutters: ECE, VUV, Z-bolo Torvac gate valve toggle (yes/no): no Boronization(yes/no): yes -------------------------------------- Boronization Parameters -------------------------------------- Vessel temp 35/35/35 foreline(TC6) pressure request: 80 mTorr sweep (rmin/rdwell/rmax): 44/52/103 cm scan: 60/120 s dP: 120 psi EF4: 0 A pulse on/off duty cycle 0.75/0.25 post: 3 Hours He ECDC immediately following the boronization 2 hours D2 ECDC this should happen following the He ECDC vessel temperature 35/35/35 for the ECDC Overnight ECDC (yes/no): See above post boronization ICRF(yes/no): yes -- all transmitters run on by 8:30 AM LH(yes/no): no DNB(yes/no): no Cryopump (yes/no): no ------------------------------ ECDC Parameters ------------------------------ See above, post boronization --------- Shot Plan --------- Start with good extended H-mode copying shot 1090828005. See SL Plan |
| Session Leader Summaries |
| Entered: Sep 1 2009 07:31:25:480PM |
| Author: Roman Ochoukov |
| Session Leader summary for run 1090901xxx:
MP558, Characterization of ICRF induced sheaths using Bdot, emissive, and ion sensitive (Katsumata) probes. The run was a continuation of the run from last Friday (1090828xxx). Note that the machine was boronized the night before (night between Monday, Aug. 31st and Tuesday, Sept. 1st/2009) today's run. Boronization of the machine clearly decreased the voltages measured during the time when the D antenna was energized, compared to similar shots from Friday. For example shot 1090901016 produced peak voltages of +30 V during the D antenna ramp up phase, however, a similar shot 1090828033 produced voltages of >+200 V during the same RF phase. The influence of the E and J antenna remained unchanged pre- and post boronization, with voltages of +10-30 V typically observed. No noticeable change on the Bdot probes, pre- and post boronozation, was observed and the bdot signals are generally not correlated with the voltages measured by the emissive probe. The magnetic field line mapping along the ICRF limiter tiles on the D antenna was accomplished via toroidal field scans from 5 to 6 T (at constant current). These Bt sweeps correspond to ~1.5 cm poloidal sweeps along the limiter tile faces and they show reproducible somewhat periodic signals on both the Bdot and emissive probes. We need to perform a more detailed mapping to determine if these signals correlate with magnetic field lines sweeping past limiter tile gaps. The big message of the run is: boronization diminished the ability of the D antenna to generate very high voltages, as observed by the hot emissive probe. |
| Physics Operator Summaries |
| Entered: Sep 1 2009 05:09:55:633PM |
| Author: Ron Parker |
| A wide variety of shots were produced in this run, with currents ranging from 0.6 to 1.3 MA, toroidal fields from 4.7 to 6.0 T, both upper and lower single null, limited and diverted, and various outer gaps. Not surprisingly, an unusual number of disruptions were produced, especially at the highest currents and lowest fields. Considering the wide variety of shots and the relatively large number of disruptions, the machine ran very well! The only significant delay was due to a data system hangup, which was quickly resolved and did not recur. Regrettably, there was one fizzle probably due to slightly too high fill pressure. After shortening the fill gas pulse by 2 ms, no further fizzles occurred.
Scorecard: 30 attempts at plasma, 18 full length, 11 disruptions (most of which were long enough to produce useful data) and, yes, 1 fizzle. |
| Session Leader Comments | |||
| Sep 1 2009 09:10:42:470AM | 1090901001 | Roman Ochoukov | shot 001:
repeat of 1090828005: good shot -- plasma 1 small H-mode at t = 1 s Bt = 5.4 T Ip = 1.0 MA nl_04 = 0.8e20 RF on but very trippy Emission on (hot, I_filament = 2.0 A) V_flt = up to +180 V during J start up decreasing to +10 V when in H-mode Bdot signal is also spiky before entering H-mode Next shot: repeat |
| Sep 1 2009 09:41:37:900AM | 1090901002 | Roman Ochoukov | shot 002:
disruption at 0.74 s Bt = 5.4 T Ip = 1.0 MA nl_04 = 0.8e20 RF on for a little bit on J only Emission on (hot, I_filament = 2.0 A) V_flt = up to +130 V during J start up decreasing to +20 V before disruption Bdot signal shows little correlation with V_float Next shot: repeat but with raised strike point |
| Sep 1 2009 10:00:51:347AM | 1090901003 | Roman Ochoukov | shot 003:
good shot -- plasma very late disruption at 1.55 s Bt = 5.4 T Ip = 1.0 MA nl_04 = 0.8e20 RF on J on all time D on staircase E on staircase Emission on (hot, I_filament = 2.0 A) V_flt = +40-50 V during J start up V_flt = +20-30 V when D is on V_flt = +5 V when E is on Bdot signal shows little correlation with V_float Next shot: repeat but with raised strike point and Ip = 0.8 MA, as in shot 1090828012 Delay due to J antenna mishap |
| Sep 1 2009 10:33:23:970AM | 1090901004 | Roman Ochoukov | shot 004:
good shot -- plasma Bt = 5.4 T Ip = 0.8 MA nl_04 = 0.8e20 raised strike point RF on J on all time D on staircase E on staircase Emission on (hot, I_filament = 2.0 A) V_flt = +20-60 V during J start up before entering H-mode V_flt = +10-15 V when D is on V_flt = +5-12 V when E is on Bdot signal shows little correlation with V_float Next shot: repeat but with E staircase first followed by D staircase |
| Sep 1 2009 10:56:59:913AM | 1090901005 | Roman Ochoukov | shot 005:
late disruption at 1.51 s good shot -- plasma Bt = 5.4 T Ip = 0.8 MA nl_04 = 0.8e20 raised strike point RF on J on all time E on staircase D on staircase Emission on (hot, I_filament = 2.0 A) V_flt = +20-45 V during J start up before entering H-mode V_flt = +5-10 V when D is on V_flt = +5V when E is on with occasional +40 V spikes during H-L transitions Next shot: repeat with 1 MA |
| Sep 1 2009 10:59:51:603AM | 1090901006 | Roman Ochoukov | shot 006:
good shot -- plasma Lots of H-modes Bt = 5.4 T Ip = 1.0 MA nl_04 = 0.8e20 raised strike point RF on J on all time E on staircase D on staircase Emission on (hot, I_filament = 2.0 A) V_flt = +20-45 V during J start up before entering H-mode V_flt = +5-20 V when D is on V_flt = +2-5V when E is on even during H-L transitions Bdot signal highest before H-mode Next shot: repeat |
| Sep 1 2009 11:07:04:683AM | 1090901007 | Roman Ochoukov | shot 007:
disruption at 1.4 s good shot -- plasma Lots of H-modes Bt = 5.4 T Ip = 1.0 MA nl_04 = 0.8e20 raised strike point RF on J on all time E on staircase D on staircase, trippy Emission on (hot, I_filament = 2.0 A) V_flt = +20-30 V during J start up before entering H-mode V_flt = +5-15 V when D is on but trippy V_flt = +2-5 V when E is on even during H-L transitions Next shot: repeat, see if we can get better RF coupling |
| Sep 1 2009 11:29:45:740AM | 1090901008 | Roman Ochoukov | shot 008:
good shot -- plasma Lots of H-modes Bt = 5.4 T Ip = 1.0 MA nl_04 = 0.8e20 raised strike point RF on J on all time E on staircase D on staircase Emission on (hot, I_filament = 2.0 A) V_flt = +20-40 V during J start up before entering H-mode V_flt = +5-10 V when D is on with one +40 V spike V_flt = +2-5 V when E is on Next shot: USN shot 1090811020, nl_04 ~1e20, Bt = 5.4 T, Ip = 1.0 MA |
| Sep 1 2009 11:41:31:430AM | 1090901009 | Roman Ochoukov | shot 009:
good shot -- plasma Bt = 5.4 T Ip = 1.0 MA nl_04 = 1.0e20 upper single null (USN) L mode RF on D tripped out E on staircase J on near end of flat top Emission on (hot, I_filament = 2.0 A) V_flt = +5-10 V when E is on V_flt = +5-15 V when J is on Very strong Bdot signal when E is on but lower V_flt compared to when J is on Next shot: repeat to get D on |
| Sep 1 2009 11:58:36:890AM | 1090901010 | Roman Ochoukov | shot 010:
good shot -- plasma Bt = 5.4 T Ip = 1.0 MA nl_04 = 1.0e20 upper single null (USN) L mode RF on D tripped out E on staircase J on near end of flat top Emission on (hot, I_filament = 2.0 A) V_flt = +5-10 V when E is on V_flt = +5-15 V when J is on Very strong Bdot signal when E is on but lower V_flt compared to when J is on Next shot: repeat to get D on and reduce right gap from 2.0 to 1.5 cm |
| Sep 1 2009 12:17:24:273PM | 1090901011 | Roman Ochoukov | shot 011:
disruption at 1.13 s good shot -- plasma Bt = 5.4 T Ip = 1.0 MA nl_04 = 1.0e20 upper single null (USN) right gap 2.0 cm L mode RF on D on staircase E on staircase J not on Emission on (hot, I_filament = 2.0 A) V_flt = +10-20 V when D is on V_flt = +5 V when E is on Bdot signal equally strong between D and E Next shot: repeat to get D on, reduce nl_04 = 0.8e20 |
| Sep 1 2009 12:30:44:747PM | 1090901012 | Roman Ochoukov | shot 012:
fizzle Next shot: repeat |
| Sep 1 2009 12:44:21:800PM | 1090901013 | Roman Ochoukov | shot 013:
good shot -- plasma Bt = 5.4 T Ip = 1.0 MA nl_04 = 0.8e20 upper single null (USN) right gap now 1.5 cm 1 late H mode RF on D on staircase E on staircase J on near end of flat top Emission on (hot, I_filament = 2.0 A) V_flt = +10-20 V when D is on V_flt = +10-20 V when E is on V_flt = +20-30 V when J is on Bdot signal is strongest when E and J is on. Next shot: repeat with right gap at 1.0, emissive probe cold (Ifil = 0 A) |
| Sep 1 2009 12:54:55:023PM | 1090901014 | Roman Ochoukov | shot 014:
good shot -- plasma Bt = 5.4 T Ip = 1.0 MA nl_04 = 0.8e20 upper single null (USN) right gap now 1.0 cm L mode RF on D on staircase E on staircase J on near end of flat top Emission off (cold, I_filament = 0.0 A) V_flt = -2 V when D is on V_flt = +5 V when E is on V_flt = +5 V when J is on Bdot signal is strongest when E and J is on. Next shot: repeat with hot emissive probe (Ifil = 2.0 A) |
| Sep 1 2009 01:18:22:690PM | 1090901015 | Roman Ochoukov | shot 015:
good shot -- plasma Bt = 5.4 T Ip = 1.0 MA nl_04 = 0.8e20 upper single null (USN) right gap now 1.0 cm L mode RF on D on staircase E on staircase J on near end of flat top Emission on (hot, I_filament = 2.0 A) V_flt = +10-40 V when D is on V_flt = +20-30 V when E is on V_flt = +20 V when J is on Bdot signal is strongest when E. Next shot: repeat shot 1090828033, Ip = 1.0 MA, nl_04=0.8e20, Bt = 5.4 T, LSN |
| Sep 1 2009 01:43:24:917PM | 1090901016 | Roman Ochoukov | shot 016:
good shot -- plasma delay due to data acquisition Bt = 5.4 T Ip = 1.0 MA nl_04 = 0.8e20 Inner wall limited L mode RF on D on staircase E on staircase J on near end of flat top Emission on (hot, I_filament = 2.0 A) V_flt = +10-30 V when D is on (about 1/6 of what it was on shot 1090828033) V_flt = +10-20 V when E is on V_flt = +20 V when J is on Bdot signal is lost. Next shot: raise Ip to 1.3 MA, Bt = 5.0 T. |
| Sep 1 2009 01:49:26:030PM | 1090901017 | Roman Ochoukov | shot 017:
early disruption at 0.53 s. Next shot: lower Ip to 1.2 MA to avoid disruption |
| Sep 1 2009 02:04:04:830PM | 1090901018 | Roman Ochoukov | shot 018:
early disruption at 0.52 s. Next shot: repeat but raise nl_04 to 1.0e20 |
| Sep 1 2009 02:29:02:010PM | 1090901019 | Roman Ochoukov | shot 019:
good shot -- plasma Bt = 5.0 T Ip = 1.2 MA nl_04 = 1.0e20 Inner wall limited L mode RF on D on staircase E on staircase J on near end of flat top Emission on (hot, I_filament = 2.0 A) V_flt = +25 V when D is on V_flt = +12 V when E is on V_flt = +8 V when J is on Bdot signal strongest when E is on. Next shot: raise Ip to 1.3 MA |
| Sep 1 2009 02:35:34:483PM | 1090901020 | Roman Ochoukov | shot 020:
good shot -- plasma late disruption at 1.45 s Bt = 5.0 T Ip = 1.3 MA nl_04 = 1.0e20 Inner wall limited L mode RF on D on staircase E on staircase J on near end of flat top Emission on (hot, I_filament = 2.0 A) V_flt = +20-28 V when D is on V_flt = +10 V when E is on V_flt = +4 V when J is on Bdot signal strongest when E is on. Next shot: lower Bt to 4.7 T |
| Sep 1 2009 03:04:06:447PM | 1090901021 | Roman Ochoukov | shot 021:
good shot -- plasma late disruption at 1.45 s Bt = 4.7 T Ip = 1.3 MA nl_04 = 1.0e20 Inner wall limited L mode RF on D on staircase E on staircase J on near end of flat top Emission on (hot, I_filament = 2.0 A) V_flt = +20-30 V when D is on V_flt = +15 V when E is on V_flt = +10 V when J is on Bdot signal strongest when E is on again. Next shot: Bt = 5.0 T, Ip = 1.0 MA. |
| Sep 1 2009 03:17:15:187PM | 1090901022 | Roman Ochoukov | shot 022:
good shot -- plasma Bt = 5.0 T Ip = 1.0 MA nl_04 = 1.0e20 Inner wall limited L mode RF on D on staircase E on staircase J on near end of flat top Emission on (hot, I_filament = 2.0 A) V_flt = +20-30 V when D is on V_flt = +10 V when E is on V_flt = +20 V when J is on Bdot toroidal signal is strongest when E is on. Bdot poloidal signal is strongest when E and J is on. Next shot: reduce Ip to 0.8 MA |
| Sep 1 2009 03:28:59:160PM | 1090901023 | Roman Ochoukov | shot 023:
good shot -- plasma Bt = 5.0 T Ip = 0.8 MA nl_04 = 1.0e20 Inner wall limited L mode RF on D on staircase E tripped J on near end of flat top Emission on (hot, I_filament = 2.0 A) V_flt = +10-15 V when D is on V_flt = +5-15 V when J is on Bdot toroidal signal is strongest when D is on. Bdot poloidal signal is strongest when J is on. Next shot: reduce Ip to 0.6 MA |
| Sep 1 2009 03:49:09:950PM | 1090901024 | Roman Ochoukov | shot 024:
good shot -- plasma disruption at 1.11 s Bt = 5.0 T Ip = 0.6 MA nl_04 = 1.0e20 Inner wall limited L mode RF on D on staircase E not on J not on Emission on (hot, I_filament = 2.0 A) V_flt = +10-15 V when D is on Next shot: repeat with reduced nl_04 = 0.8e20, ramp the toroid. field from 5 to 6 T |
| Sep 1 2009 04:02:56:517PM | 1090901025 | Roman Ochoukov | shot 025:
good shot -- plasma Bt = 5.0-6.0 T Ip = 0.6 MA nl_04 = 0.8e20 Inner wall limited L mode RF on D on flat at 1 MW E not on J not on Emission on (hot, I_filament = 2.0 A) V_flt = +10-25 V (spiky) when D is on Bdot signals are also spiky Next shot: repeat to see if the results are reproducible |
| Sep 1 2009 04:16:37:130PM | 1090901026 | Roman Ochoukov | shot 026:
good shot -- plasma Bt = 5.0-6.0 T Ip = 0.6 MA nl_04 = 0.8e20 Inner wall limited L mode RF on D on flat at 1 MW E not on J not on Emission on (hot, I_filament = 2.0 A) V_flt = +10-20 V (spiky) when D is on Bdot signals are also spiky Similar to prev. shot but not as strong in signal strength on all probes Next shot: repeat but at Ip = 1.0 MA |
| Sep 1 2009 04:27:50:400PM | 1090901027 | Roman Ochoukov | shot 027:
good shot -- plasma Bt = 5.0-6.0 T Ip = 1.0 MA nl_04 = 0.8e20 Inner wall limited L mode RF on D on flat at 1 MW E not on J not on Emission on (hot, I_filament = 2.0 A) V_flt = +10-35 V (spiky) when D is on Bdot signals are also spiky Similar to prev. shot with stronger signals Next shot: repeat but with more RF on D antenna (add 400 kW) |
| Sep 1 2009 04:51:06:287PM | 1090901028 | Roman Ochoukov | shot 028:
good shot -- plasma Bt = 5.0-6.0 T Ip = 1.0 MA nl_04 = 0.8e20 Inner wall limited L mode RF on D on flat at 1.4 MW E not on J not on Emission on (hot, I_filament = 2.0 A) V_flt = +20-60 V (spiky) when D is on Bdot signals are also spiky Similar to prev. shot with stronger signals but shift in location of spikes as well Next shot: repeat but with J antenna only |
| Sep 1 2009 04:59:36:023PM | 1090901029 | Roman Ochoukov | shot 029:
good shot -- plasma Bt = 5.0-6.0 T Ip = 1.0 MA nl_04 = 0.8e20 Inner wall limited L mode RF on D not on E not on J on flat at 1.5 W Emission on (hot, I_filament = 2.0 A) V_flt = +10-20 V (spiky) when J is on Bdot signals are also spiky Only three spikes (more like hills) compared to 5 or more when D was on Next shot: repeat but with E antenna only |
| Sep 1 2009 05:16:49:790PM | 1090901030 | Roman Ochoukov | shot 030:
ok shot -- plasma Disruption at 0.94 s Bt = 5.0-6.0 T Ip = 1.0 MA nl_04 = 0.8e20 Inner wall limited L mode RF on D not on E is on at 1.5 MW J not on Emission on (hot, I_filament = 2.0 A) V_flt = +10-20 V (spiky) when E is on Bdot signals are also spiky and very strong when E is on compared to D or J Last shot of the day. |
| Physics Operator Comments | |||
| Sep 1 2009 09:09:40:903AM | 1090901001 | Ron Parker | Shot 1 ran well and was full length.
As for RF, D&E didn't go, J was choppy. Repeat for shot 2. |
| Sep 1 2009 09:33:15:117AM | 1090901002 | Ron Parker | Shot 2 started up well, but disrupted at ~ 0.73 s. |
| Sep 1 2009 09:45:46:357AM | 1090901002 | Ron Parker | Sot 2 ran a bit low in the divertor, probably the cause of the disruption.
For shot 3, load 1090828016 which had a higher strike point. Increase the current from 800 kA to 1 MA. |
| Sep 1 2009 10:00:48:470AM | 1090901003 | Ron Parker | Shot 3 survived until rampdown when it disrupted. However, this shot was actually limited (by SL error). For next shot, we are loading shot 1090828012 |
| Sep 1 2009 10:47:29:460AM | 1090901004 | Ron Parker | Shot 4 ran full length at Ip = 800kA |
| Sep 1 2009 10:48:33:427AM | 1090901005 | Ron Parker | Shot 5 ran, but disrupted at 1.5 s
Next: 1 MA, raised ZXL by 5 mm |
| Sep 1 2009 10:51:40:630AM | 1090901006 | Ron Parker | Shot 6 ran full length. RF choppy.
Next: repeat |
| Sep 1 2009 11:04:44:713AM | 1090901007 | Ron Parker | Shot 7 disrupted at ~ 1.4 s. RF still choppy. |
| Sep 1 2009 11:19:45:893AM | 1090901008 | Ron Parker | Shot 8 ran full length.
Next: run an upper single null shot, 1090811020 |
| Sep 1 2009 11:37:15:837AM | 1090901009 | Ron Parker | Shot 9 ran full length, upper null, 1 MA, ~ 1e20 (target = 1.0e19) |
| Sep 1 2009 11:57:45:640AM | 1090901010 | Ron Parker | Shot 10 ran full length.
Next: Same, but reduce outer gap by 0.5 cm |
| Sep 1 2009 12:17:22:570PM | 1090901011 | Ron Parker | Shot 11 disrupted. Outer gap still too large. Reduce again by 0.5 cm.
Oops, right gap had not be reduced on shot 11 -- wrong segment! |
| Sep 1 2009 12:21:09:150PM | 1090901012 | Ron Parker | Sorry folks, that was a fizzle. Gas seems a bit high, reduce by 2ms for next shot.
|
| Sep 1 2009 12:36:33:233PM | 1090901013 | Ron Parker | Shot 13 ran full length.
Next: close outer gap by 0.6 cm |
| Sep 1 2009 12:56:36:117PM | 1090901014 | Ron Parker | Shot 14 ran full length. Lunchtime.
Next: Repeat |
| Sep 1 2009 01:10:18:733PM | 1090901015 | Ron Parker | Shot 15 ran full length.
Next: Run shot 1090828033 |
| Sep 1 2009 01:31:55:943PM | 1090901016 | Ron Parker | Shot 16 ran full length.
Data system hangup, Josh is looking into it. |
| Sep 1 2009 01:58:44:250PM | 1090901017 | Ron Parker | Shot 17 disrupted. Current request was 1.3 MA at 5 T
Next: lower the current request to 1.2 MA. |
| Sep 1 2009 02:07:20:020PM | 1090901018 | Ron Parker | Same thing, disruption around 0.5 s
Next: Try to raise the density to 1.0e20 m-2. continue with 5 T at 1.2 MA. |
| Sep 1 2009 02:21:34:697PM | 1090901019 | Ron Parker | Shot 19 ran full length, 5 T, 1.2 MA. Increasing the density to avoid a locked mode seemed to help.
Next: increase current to 1.3 MA. |
| Sep 1 2009 03:02:26:930PM | 1090901020 | Ron Parker | Shot 20 ran, disrupting at 1.46 s
Next: Same current (1.3 MA), lower B to 4.7 T. |
| Sep 1 2009 03:06:57:933PM | 1090901021 | Ron Parker | Shot 21 reached 1.3 MA, but disrupted beginning at ~ 1.3 s. Nevertheless, data obtained.
Next: Back to 1.0 MA, 5 T |
| Sep 1 2009 03:57:25:140PM | 1090901022 | Ron Parker | Shot 22 ran full length, a nice 1 MA, 5 T , 1.e20 shot.
Next: Ip = 0.8 MA, same field and density. |
| Sep 1 2009 03:33:55:550PM | 1090901023 | Ron Parker | Shot 23 ran as programmed, full length.
Next: 600 kA, n = 1.e20, B = 5 T. |
| Sep 1 2009 03:48:20:870PM | 1090901024 | Ron Parker | Shot 24 disrupted after MARFE.
Try again with lower density, but field ramped from 5 to 6 T. |
| Sep 1 2009 03:59:43:123PM | 1090901025 | Ron Parker | Shot 25 ran full length, as programmed.
Next: Repeat, higher RF power |
| Sep 1 2009 04:15:49:523PM | 1090901026 | Ron Parker | Another full length shot.
Next: back to 1 MA (can't they make up their minds?), scan field from 5 to 6 T, nl04 ~ 1.e20 m-2. |
| Sep 1 2009 04:27:54:510PM | 1090901027 | Ron Parker | Good, full length shot. Next: repeat |
| Sep 1 2009 04:51:40:330PM | 1090901028 | Ron Parker | Shot 28 ran full length. |
| Sep 1 2009 04:55:40:723PM | 1090901029 | Ron Parker | Another full length shot. |
| Sep 1 2009 05:09:38:590PM | 1090901030 | Ron Parker | Shot 30, the last in this run, disrupted at 0.93 s. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:01:11:637AM | Plasma | Ok | |
| 2 | 09:29:15:053AM | Plasma | Ok | |
| 3 | 09:44:45:433AM | Plasma | Ok | |
| 4 | 10:21:11:447AM | Plasma | Ok | |
| 5 | 10:34:01:750AM | Plasma | Ok | |
| 6 | 10:47:09:693AM | Plasma | Ok | |
| 7 | 10:59:43:463AM | Plasma | Ok | |
| 8 | 11:14:58:627AM | Plasma | Ok | |
| 9 | 11:28:57:270AM | Plasma | Ok | |
| 10 | 11:45:47:357AM | Plasma | Ok | |
| 11 | 12:00:28:970PM | Plasma | Ok | |
| 12 | 12:16:56:570PM | Plasma | Ok | |
| 13 | 12:29:58:997PM | Plasma | Ok | |
| 14 | 12:44:01:597PM | Plasma | Ok | |
| 15 | 12:56:52:413PM | Plasma | Ok | |
| 16 | 01:13:22:060PM | Plasma | Ok | |
| 17 | 01:42:58:430PM | Plasma | Ok | |
| 18 | 01:58:29:843PM | Plasma | Ok | |
| 19 | 02:11:23:257PM | Plasma | Ok | |
| 20 | 02:26:18:150PM | Plasma | Ok | |
| 21 | 02:44:55:940PM | Plasma | Ok | |
| 22 | 03:09:02:777PM | Plasma | Ok | |
| 23 | 03:22:16:207PM | Plasma | Ok | |
| 24 | 03:38:43:210PM | Plasma | Ok | |
| 25 | 03:52:33:420PM | Plasma | Ok | |
| 26 | 04:05:15:440PM | Plasma | Ok | |
| 27 | 04:18:12:913PM | Plasma | Ok | |
| 28 | 04:39:09:670PM | Plasma | Ok | |
| 29 | 04:52:02:817PM | Plasma | Ok | |
| 30 | 05:06:36:857PM | Plasma | Ok | |
| System Availability | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sep 1 2009 09:00:46:010AM | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||