| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Istvan Cziegler |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Andy Pfeiffer,Gary Dekow,Bill Byford |
| Engineering Operator Run Comment |
| automatically entered by signon - please replace with real comment |
| Session Leader Plans |
| Entered: Oct 14 2009 12:14:34:503AM |
| Author: Istvan Cziegler |
| MP584 - Edge Turbulence before and during the L-to-H-transition
The purpose of this run is to establish or refute the spectral variation of the electron-diamagnetic-drift-direction propagating edge turbulence â?? found originally in run 1080313 â?? as the precursor or potentially the first stage of a two-stage phase transÂition and clear up its connection to the so-called I-mode The key diagnostic is the edge GPI system, therefore there will be NINJA puffs of D2 for all of the shots to hit 20ms after the APD trigger. (@ t=0.9s in the beginning and @ t=1.04s if we need to have a longer puff) The pressure will be adjusted so as to give a good GPI contrast and introduce a minimal perturbation. (8 psi in the beginning) A shot will be considered successful -if the edge plasma is sampled by the GPI APD's for at least 300ms, so that the electron-propagating turbulence feature is clearly detectable -if the contrast from the background light on the GPI is strong enough to show the spectral features if this turbulence layer -if good data are taken from the L-mode, the pre-H-mode, the ELM-free and the subsequent EDA H-mode regime in the first half of the run day, and both in the L-mode and I-mode, in the second half There are four sections to this run 1.Ohmic H-modes â?? varying the puff time to exclude timing effects (load shot 1080313007) 2.Ohmic H-modes at varying target densities (load shot 1080313007 - vary the puff size) 3.ICRF heated H-mode transitions at the same target densities as 2. (load shot 1090909023) 4.I-mode plasmas - with a density scan (load shot 1090915009) For the whole run, the outer gap is requested to be ~0.7 cm (to be fine adjusted) 1. Ohmic L to H transitions Load shot 1080313007 Bt=5.4T-2.8T-3.8T (ramped), Ip=0.8MA, NL04=0.8e20 in order to trigger an Ohmic L to EDA H-mode transition. Repeat with puffs at -t=0.7s -t=0.8s -t=0.9s (original shot) -t=1.1s (5 shots) 2. Ohmic H-modes at varying target densities Vary the density: NL04 = 0.5e20 NL04 = 0.6e20 NL04 = 0.7e20 NL04 = 0.8e20 NL04 = 0.9e20 (or the highest density for which good GPI contrast is still feasible) (6 shots) 3. ICRF heated H-modes Load shot 1090909023 ICRF at 3.5 MW from 0.6-1.5. Ip=0.8MA, NL04=1.0e20 then decrease NL04 in decrements of 0.1e20. NL04 = 0.9e20 (or faster if no GPI contrast is feasible) to as low as it goes with a transition. (8 shots) 4. I-modes Load shot 1090915009 Bt=5.4T, Ip=0.8MA, USN, ICRF=~2.7MW NL04 = 0.3e20 NL04 = 0.4e20 NL04 = 0.5e20 NL04 = 0.6e20 NL04 = 0.7e20 NL04 = 0.8e20 NL04 = 0.9e20 26 shots total |
| Physics Operators Plans |
| Entered: Oct 13 2009 05:25:41:270PM |
| Author: Earl Marmar |
| Engineering setup for Wednesday, October 14, 2009
10910014 MP 584 - Edge turbulence in L-H transition Overnight boronization, followed by ECDC in He and D2 Run begins at 9:00 and ends at 17:00 Power Systems setup as on 1080313007 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) fill NINJA 10 psi D2, will enable during run Enable gate valves and shutters: ECE, VUV, Z-bolo Torvac gate valve toggle (yes/no): no Boronization(yes/no): YES, overnight ECDC (yes/no): yes, following boronization ICRF(yes/no): yes, expect to need up to 5 MW in later parts of the run LH(yes/no): no DNB(yes/no): no Cryopump (yes/no): no ________________________________________ There are four sections to this run: 1. Ohmic H-modes -- (like shot 1080313007) varying the puff time to exclude timing effects; 2. Ohmic H-modes at varying target densities; 3. ICRF heated H-mode transitions at the same target densities as 2. (like shot 1090909023); 4. I-mode plasmas (like shot 1090915009). For the whole run, the outer gap is requested to be ~0.7 cm (to be fine adjusted) NL04 is to be scanned in decrements of 0.1e20 from the value given in the shot to be loaded. |
| Session Leader Summaries |
| Entered: Oct 19 2009 10:33:24:680AM |
| Author: Istvan Cziegler |
| MP 584 - Edge Turbulence before and during the L-to-H transition
The run had three major objectives. First, we intended to reproduce the spectral variation of the electron-diamagnetic-drift propagating edge turbulence that was originally observed in shot 1080313007 just prior to the Ohmic L-H transition and investigate whether this phenomenon depends just as much on plasma density as does the shape of the spectrum of the same turbulence region (MP 582). Second, we wished to observe the evolution of the edge turbulence in a steady Bt, ICRF heated L-H transition in order to see if the spectral phenomenon is linked with a change in q95 or rather the transition itself. And finally, we wanted to study the edge and SOL turbulence patterns of the so-called I-mode and compare them to those found in pre-H-mode plasmas at various plasma densities. The key diagnostic of these experiments was the newly installed 2D fast GPI system. Therefore the main limitation we met was the puff-induced-to-intrinsic light contrast. Since the gas puff nozzle has been moved back by 0.5cm there has been a clear drop in the contrast-efficiency of the puffs, limiting our regular operation space to NL04~<0.8e20m^-2 (with a contrast >~2) Since technically all H-mode plasmas start at this density we had very little ability to scan the density space for this experiment. The first part of the experiment was nevertheless successful, the Ohmic L-H transition was observed with sufficient data in all four (L-mode, pre-H-mode, ELMfree, EDA) phases for a clear turbulence spectrum comparison. Spectral changes were indeed observed, although their character was different from the one originally found. The ICRF heated transitions produced a similar trend, but no definitive result can be stated yet. Analysis is underway. It is worth noting that in a fairly low density NL04=0.5e20m^-2 (L-mode) NL04=1.5e20m^-2 (EDA), RF heated plasma a third harmonic was found to the QCM. The I-mode studies were basically unsuccessful. Unfortunately, no cryopumping was requested and large puffs had to be used for GPI contrast, which probably both contributed to the difficulty accessing this confinement regime. The potential I-modes exhibited a ~400-500eV T-pedestal. It can be logged as a success though, that these plasmas showed an edge turbulence structure which is unlike most L- and H-mode spectra, exhibiting two ion-diamagnetic-drift propagating lobes and an electron-propagating lobe in the same position at the same time (with a 10ms integration time.) |
| Physics Operator Summaries |
| Entered: Oct 14 2009 05:13:06:770PM |
| Author: Earl Marmar |
| physop run summary, 1091014
The run went quite well. This was a post-boronization run. At the beginning of the day, EF3 would not fire. Reseating a circuit board apparently solved the problem. After that, we had reliable start-up (1 strong fizzle), and most shots made it all the way through rampdown. Outer gaps were tuned to be relatively small (mostly 5 to 10 mm) and we ran both LSN (some with ohmic H-modes) and USN topology, all at 800 kA flattop. Attempts at low density I-modes yielded shots that had relatively low H-mode threshold (e.g. 23, 24), or at lower RF power, very steady, but only mildly improved, L-mode (shots 25 - 27). The day ended with higher density, USN L-modes, with no RF (shots 31-33). Scorecard: 2 P.S. duds (no EF3) 1 P.S. test 1 strong fizzle 2 disruptions before end of flattop 27 full length plasmas Shot,Duration(s),Ipmax(MA),Result Shot,Duration(s),Ipmax,Result | 01 0.522 0.047 Dud | 02 0.524 0.045 Dud | | 03 -0.054 0.014 Dud | 04 1.672 0.859 Plasma | | 05 0.508 0.170 Plasma | 06 1.994 0.829 Plasma | | 07 1.994 0.825 Plasma | 08 1.977 0.827 Plasma | | 09 1.993 0.830 Plasma | 10 1.995 0.832 Plasma | | 11 1.995 0.832 Plasma | 12 1.993 0.834 Plasma | | 13 2.000 0.829 Plasma | 14 2.000 0.834 Plasma | | 15 2.000 0.825 Plasma | 16 2.000 0.830 Plasma | | 17 2.000 0.832 Plasma | 18 2.000 0.833 Plasma | | 19 2.000 0.834 Plasma | 20 2.000 0.830 Plasma | | 21 2.000 0.834 Plasma | 22 2.000 0.830 Plasma | | 23 1.994 0.836 Plasma | 24 2.000 0.831 Plasma | | 25 2.000 0.832 Plasma | 26 2.000 0.829 Plasma | | 27 2.000 0.829 Plasma | 28 1.529 0.822 Plasma | | 29 1.997 0.824 Plasma | 30 2.000 0.827 Plasma | | 31 2.230 0.835 Plasma | 32 2.260 0.811 Plasma | | 33 2.210 0.810 Plasma Date 1091014: 33 shots. 30 plasmas. 0 fizzles. 3 duds. 0 System Error. (Plasma = Ip gt 60.0 kA Dud = H_alpha lt 0.40 V) Total plasma duration: 59.34 s (exceeding -4 kA) |
| Session Leader Comments | |||
| Oct 14 2009 09:04:40:543AM | 1091014001 | Istvan Cziegler | APD trigger OK
NINJA OK No plasma shot |
| Oct 14 2009 09:17:06:073AM | 1091014002 | Istvan Cziegler | APD trigger OK
NINJA OK No plasma. |
| Oct 14 2009 09:53:00:903AM | 1091014003 | Istvan Cziegler | APD trigger OK
NINJA OK No plasma. |
| Oct 14 2009 10:26:15:043AM | 1091014004 | Istvan Cziegler | Ohmic H-mode
Bt=5.4T - 2.8T, Ip=0.8MA NL04 (L-mode) = 0.75e20 NL04 (H-mode) up to 2.e20 Outer Gap = 1.7cm sweeping to 1.5cm @ t=1.02s Transition occurs @ t= 0.922s NINJA hits @ t= 0.90s APD trigger @ t= 0.88s Contrast: poor Spectra: fair, no electron feature in L-mode (unsurprisingly) Shot disrupted @ t=1.34s |
| Oct 14 2009 10:22:37:403AM | 1091014005 | Istvan Cziegler | NINJA hits @ t= 0.90s
APD trigger @ t= 0.88s failed in startup. No plasma. |
| Oct 14 2009 10:49:26:153AM | 1091014006 | Istvan Cziegler | Regime: Ohmic H-mode
Bt=5.4T - 2.8T, Ip=0.8MA NL04 (L-mode) = 0.6e20 NL04 (after puff) = 0.75e20 NL04 (H-mode) up to 1.6e20 Outer Gap = between 0.3cm and 0.6cm Transition occurs @ t= 1.178s NINJA hits @ t= 0.904s APD trigger @ t= 0.88s Contrast: OK (factor of 2) Spectra: good, electron feature has no plateau Saturation on outermost channels. Decreased HV prog 3 and 4 by 5% |
| Oct 14 2009 11:03:34:230AM | 1091014007 | Istvan Cziegler | Regime: stays in L-mode
Bt=5.4T - 2.8T, Ip=0.8MA NL04 (L-mode) = 0.65e20 NL04 (after puff) = 0.85e20 Outer Gap = 1.1cm NINJA hits @ t= 0.904s with 9.5torr-l (until we reach lower densities) APD trigger @ t= 0.88s Contrast: OK (factor of 2.2) Spectra: good, electron feature has no plateau No saturation. |
| Oct 14 2009 11:18:20:670AM | 1091014008 | Istvan Cziegler | Regime: stays in L-mode
Bt=5.4T - 2.8T, Ip=0.8MA NL04 (L-mode) = 0.65e20 NL04 (after puff) = 0.85e20 Outer Gap = 1.1cm NINJA hits @ t= 0.904s with steady increase APD trigger @ t= 0.88s Contrast: OK (factor of 2.2) Spectra: good, electron feature has no plateau Small saturation on middle channels due to steady increase of puff. |
| Oct 14 2009 11:26:28:433AM | 1091014009 | Istvan Cziegler | Regime: stays in L-mode
Bt=5.4T - 2.8T, Ip=0.8MA NL04 (L-mode) = 0.63e20 NL04 (after puff) = 0.86e20 Outer Gap = 1.1cm NINJA hits @ t= 1.004s with 8.9torr-l APD trigger @ t= 0.98s Contrast: OK (factor of 2.2) Spectra: good, electron feature has no plateau no saturation |
| Oct 14 2009 11:47:17:277AM | 1091014010 | Istvan Cziegler | Regime: stays in L-mode
Bt=5.4T - 2.8T, Ip=0.8MA NL04 (L-mode) = 0.58e20 NL04 (after puff) = 0.86e20 Outer Gap = 0.8cm NINJA hits @ t= 1.004s with 8.9torr-l APD trigger @ t= 0.98s Contrast: OK (factor of 2.1) Spectra: very good, electron feature has no plateau |
| Oct 14 2009 12:00:32:153PM | 1091014011 | Istvan Cziegler | Regime: Ohmic H-mode
Bt=5.4T - 2.8T, Ip=0.8MA keep Bt=2.8T between: t1=1.14s t2=1.25s NL04 (L-mode) = 0.58e20 NL04 (after puff) = 0.81e20 Outer Gap = 0.8cm shrinks to about 0.6cm in H-mode NINJA hits @ t= 1.004s with 8.9torr-l APD trigger @ t= 0.98s Contrast: OK (factor of 2) Spectra: good, electron feature has no plateau but also none shows up approaching the H-mode weak EDA H-mode at t=1.3s |
| Oct 14 2009 12:09:56:357PM | 1091014012 | Istvan Cziegler | Regime: Ohmic H-mode
Bt=5.4T - 2.8T, Ip=0.8MA keep Bt=2.8T between: t1=1.14s t2=1.25s NL04 (L-mode) = 0.53e20 NL04 (after puff) = 0.76e20 Outer Gap = 0.7cm NINJA hits @ t= 1.004s with 8.8torr-l APD trigger @ t= 0.98s Contrast: OK (factor of 2.2) Spectra: good, electron feature has no plateau but also none shows up approaching the H-mode EDA H-mode starts at t=1.35s |
| Oct 14 2009 12:35:07:620PM | 1091014013 | Istvan Cziegler | Regime: RF H-mode
Bt=5.4T, Ip=0.8MA NL04 (L-mode) = 0.63e20 NL04 (after puff) = 0.73e20 NL04 (EDA) = 1.46e20 Outer Gap = 0.8cm sweeps to 0.6cm in H-mode NINJA hits @ t= 1.004s with 8.6torr-l APD trigger @ t= 0.98s Contrast: OK (factor of 2.5 (4 in H-mode1.)) Spectra: good, electron feature has a plateau before the transition @ t=1.10-1.12s but it also has one @ t=1.00-1.02s transition occurs @ t=1.126s |
| Oct 14 2009 12:41:37:183PM | 1091014014 | Istvan Cziegler | Regime: RF H-mode
Bt=5.4T, Ip=0.8MA NL04 (L-mode) = 0.63e20 NL04 (after puff) = 0.73e20 NL04 (EDA) = 1.46e20 Outer Gap = 0.8cm sweeps to 0.6cm in H-mode NINJA hits @ t= 1.004s with 8.6torr-l APD trigger @ t= 0.98s Contrast: OK (factor of 2.5 (4 in H-mode1.)) Spectra: good, electron feature has a plateau before the transition @ t=1.10-1.12s but it also has one @ t=1.00-1.02s transition occurs @ t=1.122s backtransition @ t=1.26s |
| Oct 14 2009 12:54:39:950PM | 1091014015 | Istvan Cziegler | Regime: RF H-mode
ICRF=1MW (half power, D didn't work) Bt=5.4T, Ip=0.8MA NL04 (L-mode) = 0.56e20 NL04 (after puff) = 0.74e20 NL04 (EDA) = 1.6e20 Outer Gap = 1cm sweeps to 0.6cm in H-mode NINJA hits @ t= 1.004s with 8.6torr-l APD trigger @ t= 0.98s Contrast: OK (factor of 2.3 (3 in H-mode)) Spectra: good, electron feature: @ t=1.075-1.096s distinct plateau @ t=1.130-1.150s weaker plateau transition occurs @ t=1.153s very steady EDA, good QC mode |
| Oct 14 2009 01:03:57:183PM | 1091014016 | Istvan Cziegler | Regime: RF H-mode
ICRF=1MW (half power, D didn't work) Bt=5.4T, Ip=0.8MA NL04 (L-mode) = 0.53e20 NL04 (after puff) = 0.67e20 NL04 (EDA) = 1.5e20 Outer Gap = 1cm sweeps to 0.7cm in H-mode NINJA hits @ t= 1.004s with 8.6torr-l APD trigger @ t= 0.98s Contrast: OK (factor of 2 (4 in H-mode)) Spectra: good, electron feature: @ t=1.10-1.12s weak plateau in the innermost channels, disappears on outer ones transition occurs @ t=1.122s very steady EDA, very good QC mode, with a THIRD HARMONIC! and low frequency f=70kHz, k=1.9/cm |
| Oct 14 2009 01:22:58:433PM | 1091014017 | Istvan Cziegler | Regime: RF H-mode
Bt=5.4T, Ip=0.8MA NL04 (L-mode) = 0.48e20 NL04 (after puff) = 0.71e20 NL04 (EDA) = 1.46e20 Outer Gap = 1cm sweeps to 0.6cm in H-mode NINJA hits @ t= 1.004s with 8.6torr-l APD trigger @ t= 0.98s Contrast: OK (factor of 2 (3 in H-mode)) Spectra: good transition occurs @ t=1.1375s Very steady EDA. Good QC. f=70kHz |
| Oct 14 2009 01:42:16:763PM | 1091014018 | Istvan Cziegler | Regime: RF H-mode
Bt=5.4T, Ip=0.8MA NL04 (L-mode) = 0.48e20 No NINJA puff. (in order to lower wall fueling on next shot) NL04 (EDA) = 1.46e20 Outer Gap = 1cm sweeps to 0.6cm in H-mode APD trigger @ t= 0.98s transition occurs @ t=1.122s |
| Oct 14 2009 01:42:28:293PM | 1091014019 | Istvan Cziegler | Regime: RF H-mode
Bt=5.4T, Ip=0.8MA NL04 (L-mode) = 0.44e20 No NINJA puff. (in order to lower wall fueling on next shot) NL04 (EDA) = 1.56e20 Outer Gap = 1cm sweeps to 0.6cm in H-mode APD trigger @ t= 0.98s transition occurs @ t=1.12s |
| Oct 14 2009 01:52:52:230PM | 1091014020 | Istvan Cziegler | Regime: RF H-mode
Bt=5.4T, Ip=0.8MA NL04 (L-mode) = 0.4e20 NL04 (after puff) =0.6e20 NL04 (EDA) = 1.43e20 Outer Gap = 1cm sweeps to 0.6cm in H-mode NINJA hits @ t= 1.004s with 8.6torr-l APD trigger @ t= 0.98s transition occurs @ t=1.136s Contrast: good (factor of 3) Spectra: good. Low frequency QC mode in EDA regime. The frequency shifts constantly. |
| Oct 14 2009 02:05:57:157PM | 1091014021 | Istvan Cziegler | Regime: Ohmic L-mode
Bt=5.4T, Ip=0.8MA NO RF power. NL04 (L-mode) = 0.45e20 NL04 (after puff) =0.59e20 Outer Gap = 1cm NINJA hits @ t= 1.004s with 8.6torr-l APD trigger @ t= 0.98s Contrast: good (factor of 3) Spectra: good, ohmic L type |
| Oct 14 2009 02:17:44:203PM | 1091014022 | Istvan Cziegler | Regime: Ohmic L-mode
Bt=5.4T, Ip=0.8MA NL04 (L-mode) = 0.45e20 NL04 (after puff) =0.59e20 Outer Gap = 1cm NINJA hits @ t= 1.004s with 8.6torr-l APD trigger @ t= 0.98s Contrast: good (factor of 3) Spectra: good, ohmic L type |
| Oct 14 2009 02:45:26:160PM | 1091014023 | Istvan Cziegler | Regime: RF I-mode
Bt=5.4T, Ip=0.8MA NL04 (L-mode) = 0.38e20 NL04 (after puff) =0.53e20 NL04 (H-mode) = 1.3e20 Outer Gap = 0.7cm NINJA hits @ t= 1.004s with 8.6torr-l APD trigger @ t= 0.98s Contrast: fair (factor of 1.8) Spectra: OK Flash @ t=1.1s (RF on) H-mode transition occurs @ t=1.2s The density trace almost looks like there are 2 transitions (two bumps up) |
| Oct 14 2009 02:51:30:707PM | 1091014024 | Istvan Cziegler | Regime: RF I-mode
Bt=5.4T, Ip=0.8MA NL04 (L-mode) = 0.36e20 NL04 (after puff) =0.53e20 NL04 (H-mode) = 1.25e20 Outer Gap = 0.7cm NINJA hits @ t= 1.004s with 8.6torr-l APD trigger @ t= 0.98s Contrast: fair (factor of 1.8) Spectra: OK Flash @ t=1.1s (RF on) H-mode transition occurs @ t=1.2s The density trace almost looks like there are 2 transitions (two bumps up) |
| Oct 14 2009 03:21:52:143PM | 1091014026 | Istvan Cziegler | Regime: RF I-mode
Bt=5.4T, Ip=0.8MA ICRF = 2MW @ t=1.1s NL04 (L-mode) = 0.26e20 NL04 (I-mode) =0.68e20 Outer Gap = 0.7cm NINJA hits @ t= 1.004s with 8.6torr-l APD trigger @ t= 0.98s Contrast: fair (factor of 2.5) Spectra: same as before H-mode transition @ t=1.45s (ICRF J) |
| Oct 14 2009 03:43:09:813PM | 1091014027 | Istvan Cziegler | Regime: RF I-mode
Bt=5.4T, Ip=0.8MA ICRF = 2MW @ t=1.1s NL04 (L-mode) = 0.2e20 NL04 (I-mode) =0.57e20 Outer Gap = 0.7cm NINJA hits @ t= 1.004s with 8.6torr-l APD trigger @ t= 0.98s Contrast: good (factor of 3.5) Spectra: similar as before I-transition @ t=1.13s H-mode transition @ t=1.45s (ICRF J) The most regular power law decay in the ion-spectrum I've ever seen. Linear from 10kHz to 400kHz. |
| Oct 14 2009 03:49:01:330PM | 1091014028 | Istvan Cziegler | Regime: RF I-mode
Bt=5.4T, Ip=0.8MA disrupted @ t=1.165s ICRF = 2MW @ t=1.1s NL04 (L-mode) = 0.23e20 |
| Oct 14 2009 04:12:15:737PM | 1091014029 | Istvan Cziegler | Regime: RF I-mode (no real I-mode, looks like a regular L)
Bt=5.4T, Ip=0.8MA ICRF = 2MW @ t=1.1s NL04 (L-mode) = 0.37e20 NL04 (puff) = 0.44e20 NL04 (I-mode) = 0.57e20 NINJA @ t=1.04s with 4.7 torr-l (no inboard puff) Contrast: poor (factor of 1.8) Spectra: like before |
| Oct 14 2009 04:38:23:673PM | 1091014031 | Istvan Cziegler | Regime: L-mode
Bt=5.4T, Ip=0.8MA ICRF = 2MW @ t=1.1s NL04 (puff) = 1.1e20 NINJA @ t=1.04s with 4.7 torr-l (no inboard puff) Contrast: poor (factor of 1.3) Saturation everywhere. Decreasing all HV progs by 10%. |
| Oct 14 2009 04:56:58:563PM | 1091014032 | Istvan Cziegler | Regime: L-mode
Bt=5.4T, Ip=0.8MA NO ICRF NL04 (puff) = 1.24e20 NINJA @ t=1.04s with 12.1 torr-l Outer gap = 1.0cm Contrast: Fair (factor of 2.1) Spectra: Old L-mode-like (continous electron feature, very linear dispersion) |
| Oct 14 2009 05:06:01:830PM | 1091014033 | Istvan Cziegler | Regime: L-mode
Bt=5.4T, Ip=0.8MA NO ICRF NL04 (puff) = 1.26e20 NINJA @ t=1.04s with 12.1 torr-l Outer gap = 1.0cm Contrast: Fair (factor of 1.8) Spectra: Old L-mode-like (continous electron feature, very linear dispersion) |
| Physics Operator Comments | |||
| Oct 14 2009 09:05:14:683AM | 1091014001 | Earl Marmar | Load From 1091008010
import segment 2 from 1080313007 into segment 2 recalculate all magnetics reduce prefill puff to 19 ms ps dud, no EF3 |
| Oct 14 2009 09:16:06:357AM | 1091014002 | Earl Marmar | no dpcs changes
ps dud, no EF3 |
| Oct 14 2009 09:18:47:967AM | 1091014002 | Earl Marmar | delay after this shot to troubleshoot EF3
|
| Oct 14 2009 10:00:44:027AM | 1091014003 | Earl Marmar | EF3 test (PLC control)
looks ok Gary said "I reseated a board." |
| Oct 14 2009 10:19:37:560AM | 1091014004 | Earl Marmar | try again
same dpcs settings as for shot 2 plasma ohmic h-mode disrupt at 1.33 s, preceded by radiation |
| Oct 14 2009 10:32:40:700AM | 1091014005 | Earl Marmar | increase rcur .0065 (to reduce the outer gap)
strong fizzle, dies at 30 msec, 160 kA current rise is faster than on shot 4, but not clear if that's the issue significant increase in CIII starting at 25 ms |
| Oct 14 2009 10:41:08:543AM | 1091014006 | Earl Marmar | based on revised efit from shot 4, decrease rcur (relative to shot 5 programming)
plasma, full length 1 short H-mode outer gap is a little small for comfort |
| Oct 14 2009 11:03:13:827AM | 1091014007 | Earl Marmar | reduce early segment 1 PG3 puff (to try to eliminate early marfe/D-alpha spike)
enable argon, 50 ms puff starting at 0.3 s decrease RCUR 0.001 m (to increase outer gap) plasma, full length no H-mode |
| Oct 14 2009 11:13:12:027AM | 1091014008 | Earl Marmar | decrease nl_04 target to 4.5e19 (from 5.5e19)
plasma, full length no H-mode |
| Oct 14 2009 11:28:26:263AM | 1091014009 | Earl Marmar | decrease early PG3 voltage preprog., both segment 1 and segment 2
plasma, full length no H-mode |
| Oct 14 2009 11:28:09:527AM | 1091014010 | Earl Marmar | disable argon
increase RCUR 0.0015 m (now 0.662 m over the time of interest) |
| Oct 14 2009 12:00:03:730PM | 1091014011 | Earl Marmar | delay the TF re-ramp up slightly (stay around 80 kA until 1.25 s)
plasma, full length got the H-mode back, not EDA-ish enough for the S.L. |
| Oct 14 2009 12:14:03:827PM | 1091014012 | Earl Marmar | increase the TF re-ramp rate a tad, still starting at 1.25 s
plasma, full length H-mode interesting RF pulses around 1.5 s, 4 MW, many neutrons, B_T = 3.55 T |
| Oct 14 2009 12:23:48:763PM | 1091014013 | Earl Marmar | TF -150 kA straight across to 1.5 s
plasma, full length nice EDA H-mode, ~2 MW ICRF |
| Oct 14 2009 12:38:58:403PM | 1091014014 | Earl Marmar | no dpcs changes
plasma, full length 2 H-modes, RF is trippier |
| Oct 14 2009 12:51:25:170PM | 1091014015 | Earl Marmar | increase ZXL by 1 cm
enable argon plasma, full length EDA H-mode, 1 MW ICRF |
| Oct 14 2009 01:00:04:700PM | 1091014016 | Earl Marmar | nl_04 target to 4e19
decrease PG3 preprog. voltage (segments 1 and 2) plasma, full length startup is getting very dicey |
| Oct 14 2009 01:19:19:527PM | 1091014017 | Earl Marmar | increase prefill puff by 2 ms (now 21 ms)
plasma, full length startup better nice steady EDA H-mode, 2.5 MW ICRF H98~.9, H89~1.5 |
| Oct 14 2009 01:28:51:153PM | 1091014018 | Earl Marmar | nl_04 target to 2e19 (just to make sure there's no segment 2 puff)
ninja off plasma, full length EDA H-mode radiated power increases strongly when J turns on and the total ICRF power goes from 2.5 to 4.3 MW |
| Oct 14 2009 02:08:00:470PM | 1091014019 | Earl Marmar | no dpcs changes
ninja still off plasma, full length |
| Oct 14 2009 02:08:25:660PM | 1091014020 | Earl Marmar | no dpcs changes
ninja on plasma, full length |
| Oct 14 2009 02:07:42:470PM | 1091014021 | Earl Marmar | going to USN (I-mode portion of the MP)
import segment 2 from 1090915009 into segment 2) call all magnetics nl_04 target to 2e19 (no segment 2 puff) increase prefill puff to 23 ms (from 21 ms) increase RCUR by 5 mm (to decrease outer gap) plasma, full length no ICRF |
| Oct 14 2009 02:18:31:423PM | 1091014022 | Earl Marmar | increase RCUR 0.0015 m
plasma, full length no ICRF |
| Oct 14 2009 02:56:11:847PM | 1091014023 | Earl Marmar | no dpcs changes
plasma, full length got the ICRF (2.5 MW) this time looks like a short period of good confinement followed by transition to regular H-mode |
| Oct 14 2009 02:57:29:423PM | 1091014024 | Earl Marmar | no dpcs changes
plasma, full length very similar to shot 23 |
| Oct 14 2009 03:21:38:160PM | 1091014025 | Earl Marmar | no dpcs changes
plasma, full length looks like a sustained I-mode H98 ~ 0.8 |
| Oct 14 2009 03:22:11:377PM | 1091014026 | Earl Marmar | no DPCS changes
plasma, full length very similar to shot 25 |
| Oct 14 2009 03:38:08:423PM | 1091014027 | Earl Marmar | prefill puff to 24 ms (from 23 ms)
plasma, full length early hards |
| Oct 14 2009 03:52:07:940PM | 1091014028 | Earl Marmar | prefill puff to 27 ms
increase segment 1 PG3 voltage plasma runaways, growing during the shot disrupt at 1.2 s, shortly after RF comes on |
| Oct 14 2009 04:09:32:190PM | 1091014029 | Earl Marmar | target nl_04 to 4e19
plasma, full length early spike of hards |
| Oct 14 2009 04:15:53:237PM | 1091014030 | Earl Marmar | target nl_04 to 5.5e19
plasma, full length more hards |
| Oct 14 2009 04:45:04:220PM | 1091014031 | Earl Marmar | target nl_04 to 1.0e20
plasma, full length early hards big marfe from 0.5 to 1.0 s no RF to speak of |
| Oct 14 2009 04:53:15:033PM | 1091014032 | Earl Marmar | no dpcs changes
plasma hards are gone very similar to shot 31 big injection at 0.57 s |
| Oct 14 2009 05:02:20:940PM | 1091014033 | Earl Marmar | prefill puff to 25 ms (from 27 ms)
plasma, full length similar to shot 31 |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:58:56:997AM | Plasma | Bad | EF3 failed to run checked no problem found |
| 2 | 09:12:26:137AM | Plasma | Bad | EF3 Problem |
| 3 | 09:48:59:653AM | Test | Ok | EF3 3KV at 3KA |
| 4 | 09:59:45:467AM | Plasma | Ok | |
| 5 | 10:19:34:247AM | Plasma | Ok | |
| 6 | 10:32:43:887AM | Plasma | Ok | |
| 7 | 10:49:57:747AM | Plasma | Ok | |
| 8 | 11:03:58:340AM | Plasma | Ok | |
| 9 | 11:18:06:217AM | Plasma | Ok | |
| 10 | 11:30:44:153AM | Plasma | Ok | |
| 11 | 11:46:32:920AM | Plasma | Ok | |
| 12 | 11:59:21:060AM | Plasma | Ok | |
| 13 | 12:12:24:247PM | Plasma | Ok | |
| 14 | 12:25:51:920PM | Plasma | Ok | |
| 15 | 12:38:38:730PM | Plasma | Ok | |
| 16 | 12:51:17:323PM | Plasma | Ok | |
| 17 | 01:04:27:653PM | Plasma | Ok | |
| 18 | 01:18:00:217PM | Plasma | Ok | |
| 19 | 01:30:55:793PM | Plasma | Ok | |
| 20 | 01:43:36:873PM | Plasma | Ok | |
| 21 | 01:57:52:760PM | Plasma | Ok | |
| 22 | 02:10:40:190PM | Plasma | Ok | |
| 23 | 02:24:50:470PM | Plasma | Ok | |
| 24 | 02:43:12:267PM | Plasma | Ok | |
| 25 | 03:00:02:487PM | Plasma | Ok | |
| 26 | 03:13:54:690PM | Plasma | Ok | |
| 27 | 03:31:12:470PM | Plasma | Ok | |
| 28 | 03:45:53:127PM | Plasma | Ok | |
| 29 | 03:58:32:783PM | Plasma | Ok | |
| 30 | 04:11:13:203PM | Plasma | Ok | |
| 31 | 04:29:00:207PM | Plasma | Ok | |
| 32 | 04:43:56:453PM | Plasma | Ok | |
| 33 | 04:56:41:500PM | Plasma | Ok | |
| System Availability | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Oct 14 2009 08:58:29:013AM | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Oct 14 2009 04:08:07:877PM | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 300 C delta T on K limiter. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||