| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Ken Liao |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Andy Pfeiffer,Ed Fitzgerald,Thomas Toland |
| Engineering Operator Run Comment |
| MP#695 Fast ion production and transport in D(3He) minority heating and |
| Session Leader Plans |
| Entered: Oct 1 2012 07:54:40:330AM |
| Author: Ken Liao |
| MP 695: Fast ion production and transport in D(3He) minority heating and mode conversion.
Required systems: DNB, ICRF (50MHz J) Desired Diagnostics: TS, GPC, GPC2, FRCECE, PCI, HIREX Enable He3 (15 psi) on B-side upper Argon on H-bottom for HIREX Use equilibrium from 1120927017. B_T = 5.5T (50MHz resonance near 0.76m) J port dipole phasing 1. threshold of mode conversion Start with 150ms He3 puff and scan downward until we get strong minority heating Ip = 1000 kA, nl04 = 0.7 m-2, PICRF = 3 MW (J-port 1MW), He3 puff = 150, 100, 50, ... 2. minority heating power scan Ip = 1000 kA, nl04 = 0.7 m-2, He3 puff = chosen from best heating above a. J-port off, D+E = 3MW b. J-port 0.5MW, D+E = 2.5MW c. J-port 1.5MW, D+E 1.5MW d. J-port 1.0MW, D+E = 0 3. plasma current scan Ip = 800, 1200 kA, nl04 = 0.7 m-2, PICRF = 3 MW, He3 puff = chosen from above 4. resonance position scan Ip = 1000 kA, nl04 = 0.7 m-2, PICRF = 3 MW, B_T = 4.8T, 5.3T 5. Locked mode shot for HIREX 6. density scan Ip = 1000 kA, nl04 = 0.9, 1.1 m-2, PICRF = 3 MW, B_T = 5.5T 7. Install 40 psi He in B-side main. Do a Helium main ion shot for calibration. No change in equilibrium. nl04 = 0.6. no ICRF. |
| Entered: Oct 1 2012 08:54:41:163AM |
| Author: Yijun Lin |
| MP721, additional half-day run.
contingent on the following: a. J antenna phases have been corrected; b. J antenna can provide > 1.5 MW pulse. A. More NTM studies: We need to study a case that the NTMs are really limiting the plasma performance... this can only be done with higher power. i.e., beta_N does not increase even with much higher heating.. shot 1: without NTMs (1120927022) that we can increase beta with ramping-up heating.. shot 2: with NTMs (1120927019) that we cannot increase beta with ramping-up heating... and with slow RF ramp-down, NTMs would disappear at certain beta shot 3: try to avoid NTMs with certain antenna phase that produces smaller sawteeth (or delay sawtooth onset) B. Flow drive part... shot 4: find a candidate, that is prone to NTMs. (1120927019) run J at full power (selected phase) to drive rotation... then add D/E to trigger I-mode and check rotation... shot 5: find a candidate that is not prone to NTMs. (1120927022) run J at full power, and drive rotation.... then add D/E to trigger I-mode and check rotation... I want to know whether the two rotation will super-impose linearly... shot 1120927030 seems to have more rotation with J adding onto I-mode... (there is no NTMs...so they do add together...but the max rot is not sufficient) shot 6: find a candidate that is not prone to NTMs. (1120927022) run D/E full power to get I-mode, then add J full power in the I-mode phase... shot 7: find a candidate that is prone to NTMs. (1120927019) run D/E full power get I-mode, then add J full power in the I-mode phase shot 8: check the best condition, try max rotation... Total 8 good shots (plus shots that are needed to develop the good shots, I need a half run day but no more) |
| Physics Operators Plans |
| Entered: Sep 28 2012 05:23:32:367PM |
| Author: Steve Wolfe |
Engineering setup and Physop Plan for Monday, Oct 1, 2012 (aka Sep 31)
MP#695 Fast ion production and transport in D(3He) minority heating and mode
conversion.
SL: Liao
Note: This run depends on satisfactory performance from the DNB, as well as
good He3 heating from J-port, and acceptable S/N for the He3 signal on
the SL's diagnostic. If these conditions are not met, one (both?) of
the following experiments will be substituted
MP#721 Study of ICRF mode conversion flow drive and NTMs in high performance
I-mode plasmas
SL: Y Lin
OR
MP#720 Controlling sawteeth and fluctuations in I-Mode with modulated off-axis
mode conversion heating
SL: D Ernst
PO: wolfe
-----------------
Engineering Setup
-----------------
Run begins at 10:00 and ends at 18:00
Power systems as on: 1120927017
Acoil: -Dtop +Dbot +Jtop -Jbot (standard reverse field) Hybrid Enabled
Gas setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 2 psi Ne Hybrid DISABLED (PG1)
*** Top-up B-side upper to 15 PSI Helium-3, Hybrid enabled (PG2) ***
fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3)
fill H-bottom with 1 psi Ar Hybrid enabled(PG5)
leave B-div as is Hybrid DISABLED (PG6)
leave H-div as is Hybrid DISABLED (PG7)
fill NINJA F-port with 10 psi D2 DISABLED
fill NINJA C-port with 10 psi D2 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): no
Cryopump (yes/no): no
DNB (yes/no): yes
Vessel temperature: 45/45/45
------------------------------
ECDC Parameters (if requested)
------------------------------
gas and pressure: D2 at 2e-4 Torr
sweep: 44/45/103 cm
scan: 20/120 s
*********************************************************
PO Plan for MP#695
1. Load from reference shot#1120927017
Reduce nl04 in flattop from 7e19 to 5e19 - Try to talk SL into higher nl04!
Increase TF_CURRENT from 142740 to 154000 (5.5T)
Probably need to change B21_PROJ offset from 0 to .0001 as done on 1120927
to avoid locked modes; will need to carefully monitor the shoelace and
GH limiter heating.
Increase PG2 (He3) from 100msec to 150msec
- Scan in He3 puff downward to get to minority regime.
2. Using PG2 puff from step 1, scan RF power. No DPCS change required,
except if we decide to try adding H2, which could go in B-side Lower.
Definitely need to monitor outboard heating and restrict RF energy
to avoid catastrophic damage.
3. Scan current to
800ka (Probably won't be allowed, based on outboard heating observations)
1.2MA (Probably won't run without locked modes)
4. Ip back to 1MA and can field (resonance location), B=4.8T(134400kA),
5.3T(148400kA)
5. Try again for a locked mode shot for HIREX, if we haven't already
had some
6. Density scan nl04 to 7 and 9e19 at 1MA, 5.5T
7. Pump and purge B-main and fill to 40psi He. SL thinks this is going to
give him a calibration, despite prior experience that the changeover
takes of order 10 shots. Maybe we can estimate the residual D2 from
the relative neutron rate; note that the well-calibrated neutron detectors
are killed by RF pickup at 50MHz, so even this is going to be dicey.
**************************************
Contingency PO_PLAN for MP#721 (Flow drive and NTM's)
1. Go back to whatever starting point from 1120927 the SL wants, probably
1120927017 is as good as any.
2. Tweak up as required by SL, again monitoring outboard heating at higher
powers and pulse lengths, as on 1120927
3. Let the RF guys do their thing.
****************************************
Contingency PO_Plan for MP#720 (off-axis I-modes with modulated heating)
1. Load (or import seg2 from) 1120907028 (1.1MA, 8e19)
Increase BT to 6.1 to 6.3T (TF_CURRENT to 171000, TF_current limit to 180kA)
There is a funny step out on RCUR between and 1.25s and 1.5s; probably
want to remove it.
Monitor outboard heating. Add Ne (B-side Lower) if it seems necessary,
Add H2 (someplace?) if tail heating seems excessive.
2. If necessary, try to get a locked mode calibration shot for HIREX
3. Follow SL requests for changes, if any.
|
| Session Leader Summaries |
| Entered: Oct 1 2012 06:33:21:103PM |
| Author: Ken Liao |
| This run has given us some promising data, despite some frustrating difficulty with the J port antenna which continued to have problems running at high power even after the reconfiguring of the phasing. We took some time figuring out what power level we could reasonably run at, trying different power, electron density, helium-3 puff, and lowering toroidal field. But the only thing that really seemed to help was to go to 270 degree phasing, rather than heating phasing. With 270 degree phasing, we were limited to about 1.5MW power, but it still faulted sometimes. We started to get some good data when we increased the D and E power to 2.5MW, bringing the total power to 4MW. We needed a hot enough plasma to get good heating with the J antenna.
The plasmas ran very well--just two early disruptions not counting locked mode, and plasma conditions were pretty stable. Beam incredibly worked repeatably and faultlessly throughout the entire run, although the beam camac messed up the digitizing for 5 shots and we lost useful beam current and voltage data. We could definitely see beam enhancements from thermal helium-3 and helium-3 with energies greater than about twice the ion temperature, although some more analysis is needed to see if this tail exceeds a Maxwellian. |
| Physics Operator Summaries |
| Entered: Oct 1 2012 06:31:03:570PM |
| Author: Steve Wolfe |
Physop summary for Monday, Oct 1, 2012 (or is it Sept 31?)
MP#695 Fast ion production and transport in He3 minority heating and mode
conversion
SL: Liao
PO: wolfe
EO: Pfeiffer, Fitzgerald, Toland
The machine ran well today, and the beam worked smoothly at 4-5Amps.
The J-port antenna struggled early to deliver power at 50MHz, but
eventually managed to run cleanly up to ~1.5MW, with 270deg phase.
This seemed to be adequate to give the SL some visible He tail signal,
especially with 2.5MW from D&E helping get the Te up. We spent
most of the day at nl04~8e19, higher than orignally requested, but
still apparently allowing observable effects without overheating anything
or running into locked mode problems. A He3 (pg2) puff of 100msec turned
out to be a good choice for minority heating, and most of the day
used this setting.
The first shot (#2) had an early disruption, apparently due to an
injection. On shot#11 the PF breaker pulled during the countdown,
and we had to take a no-power shot; fuses were checked and nothing
was found, and the problem did not recur. Shot#17, at 800kA, 5.0T,
disrupted near crossover. I made an adjustment to the early CLEARIN and
RCUR to avoid/minimize limiter contact at crossover, and reduced the
PG5 (argon), and we didn't have the problem again. All shots after 18,
except the locked mode attempts, had the larger inner gap before 0.5sec.
The H-bottom plenum argon pressure was higher than expected, and there
were indications of excess argon in early shots, namely rampdown
disruptions.
Shots#23 and #24 were at 1.2MA, and disrupted very early in rampdown.
I made some tweaks to the rampdown programming before #25, but then
the SL requested we go back to 1.0MA, so these were not tested. However,
the subsequent 1.0MA shots retained these changes and ran full length,
while the earlier ones had disrupted mid ramp-down.
We had two more tried at a reversed field locked mode calibration shot
on #30 and 31, following the method used on 1120927033 to turn off the
B21_proj rather than overdriving the ACOIL. #30 disrupted early without
a locked mode because of excess Argon (mlr had requested 200msec). Shot#31
gave a locked mode at .8sec and disrupted at .84, which gave enough time
for the calibration. Both these shots were at 5.5T, 900kA. I think if
the current were dropped back to 800kA it might not disrupt.
Shot#27 was supposed to be at 4.8T, but ran at 5.5T because, while I
did the load I had forgotten to APPLY the change on the ALL_V screen
before loading. Interestingly, the RF behavior was much worse on 27 than
on 26, which had identical programming.
Scorecard:
Tests 1
No Power 1
Duds 0
Fizzles 0
Plasmas 31 (27 into rampdown)
======== ==
Shots 33
|
| Session Leader Comments | |||
| Oct 1 2012 10:13:49:100AM | 1121001002 | Ken Liao | First shot.
Ip = 1000 kA, nl04 = 0.7 m-2, PICRF = 3 MW (J-port 1MW), He3 puff = 150 Beam timing is 75/25, 10 pulses starting at 0.3s ICRF timing, D+E from 0.5-1.2s, J from 0.6-1.1s. Early disruption. The beam also did not fire. Camac error? Also, Roper did not collect data! Try again |
| Oct 1 2012 10:23:02:710AM | 1121001003 | Ken Liao | Full length plasma,
Beam fired all 10 pulses, 35kV, ~4.7A got ICRF. Density rises during ICRF. Te ~ 4keV at top of sawteeth Next shot. Same He3 puff. Increase J port power to 1.5MW. Decrease D+E combined power to 1.5MW. |
| Oct 1 2012 10:59:28:527AM | 1121001004 | Ken Liao | Full length plasma,
Beam fired all 10 pulses, 35kV, ~4.7A. Decent beam enhancement. J port power at 1.5MW. At 1.4s, some J port activity to test how high the power can go. Density uncontrolled during ICRF. Te ~ 4.5keV at top of sawteeth Enhancement somewhat visible at 5keV Doppler shift. PCI mode conversion signal is at the edge of the window, near 0.77m. See activity near 0.87s. nHe/ne ~ 0.07 Next shot. drop He3 to 100ms. This will probably move the mode conversion resonance out of the PCI window. I want to stay at 5.5T though for better visibility of fast ions. |
| Oct 1 2012 11:02:23:700AM | 1121001005 | Ken Liao | Full length plasma,
Beam fired into plasma but the beam digitizer failed. We still have clear enhancement, but no beam traces. Move to next configuration despite loss of beam signals. We are getting higher heating at 100ms puff than 150ms. Peak Te ~5keV, and we get a strong He CXRS signal at 5keV as well. PCI signal activity shows up earlier in this shot compared with last shot because He3 density is dropping with time. nHe/ne ~ 0.07 at 0.68s., then it drops out of range of the PCI. Next shot. drop He3 to 50ms. |
| Oct 1 2012 11:22:14:103AM | 1121001006 | Ken Liao | Full length plasma,
Beam digitizer failed again! This is really worrying. Beam did fire though. J port did not couple well. Possibly the He3 density is too low? Got some moly emission later in the shot, possibly because the density is dropping later in the shot. Try 75ms puff He3, same ICRF power. Hope the beam digitizers will work. |
| Oct 25 2012 11:13:02:460PM | 1121001007 | Ken Liao | J port still bad.
next shot: repeat, and hope for better J. |
| Oct 1 2012 11:53:34:530AM | 1121001008 | Ken Liao | Full length plasma,
Beam digitizer failed again! Beam did fire though. J port did not clean up. Maybe the electron density is too low. Edgar manipulated some wires on the Beam camac to try to get it to work again. Next shot, increase density set point to 0.8. |
| Oct 1 2012 12:19:56:007PM | 1121001009 | Ken Liao | Full length plasma,
Beam digitizer failed again! Beam did fire though. J port worse than last shot. Recool is taking really long. 15 minutes Try increasing He3 to 125ms. |
| Oct 1 2012 12:40:21:957PM | 1121001010 | Ken Liao | Full length plasma,
Beam digitizer worked! No explanation for why. J port still faulting, despite using 125ms He3 puff. We got an iron injection 0.87s. We see a burst of signal on CXRS camera. Next shot. Change he3 puff back to 75ms. Reduce J power to 1MW. Leave D+E at 1.5MW. |
| Oct 25 2012 11:13:40:663PM | 1121001011 | Ken Liao | breaker pulled. abort shot. try again. |
| Oct 1 2012 01:17:50:817PM | 1121001012 | Ken Liao | Full length plasma,
Beam ok J port mostly clean at 1MW. Te at 4-4.5keV at top of sawtooth Some beam enhancement is visible at 5keV and 7.5keV. Not sure if I can see anything at 10keV by eye. Coils seem to be cooling faster now. Next shot. Repeat this shot for statistics and to see if J-port is repeatable. |
| Oct 25 2012 11:15:47:190PM | 1121001013 | Ken Liao | Full length plasma.
J still at 1MW, but this time it faults partway through. |
| Oct 1 2012 01:28:53:813PM | 1121001014 | Ken Liao | Full length plasma,
Beam ok J port fired cleanly at 0.5MW. Some faults on D though. Te at 5keV at top of sawtooth J ramp at 1.3s makes it up to 1.8MW before faulting. It looks like the repair of the J port phasing over the weekend may not have fixed the power threshold issue. Next shot, J port off. D+E combined power to 2.5MW. |
| Oct 1 2012 01:42:49:620PM | 1121001015 | Ken Liao | Full length plasma,
Beam ok Some faults on D and E. Te at 5keV at top of sawtooth Don't see much enhancement at 5keV. Next shot. J to 1MW D+E = 1.5MW Ip to 800kA 75ms puff He3 |
| Oct 1 2012 01:58:06:397PM | 1121001016 | Ken Liao | Full length plasma,
Beam ok J port did not run well at 1MW. Well, J-port isn't getting better, and I don't know if it's worthwhile to do a current scan at 0.5MW J-port, so lets try a field change to see if it helps J. We'll lose some range on ECE, but don't worry about adjusting GPC for this next shot. Next shot. B_t to 5.0T, Ip still at 800kA. J power 1MW. |
| Oct 1 2012 02:07:25:803PM | 1121001017 | Ken Liao | Attempt at 5T shot
Disrupted at 0.47s. Try again. |
| Oct 1 2012 02:30:04:370PM | 1121001018 | Ken Liao | B_t 5.1T
Full length plasma Beam ok J port still struggling at this field. It doesn't look like field change helped. However, it looks like 270 phasing may give more stable ICRF based on J port tests at 1.3s. So, we will try again at 5.5T with 270 degree phasing. Power ramps were reaching 1.8MW on J. Next shot, B_t 5.5T 270 degree phasing on J, 1.5MW D+E = 1MW change He3 puff to 100ms. Ip = 1MA |
| Oct 1 2012 02:40:59:837PM | 1121001019 | Ken Liao | Full length plasma
B_t 5.5T 270 degree phasing on J, 1.5MW D+E = 1MW He3 puff at 100ms. T_e Maximum around 3.25keV at top of sawteeth. Still have some enhancement visible at 5keV and 7.5keV Ok, ICRF works at this phasing and power. next shot Ip to 800kA. |
| Oct 1 2012 02:50:14:623PM | 1121001020 | Ken Liao | Full length plasma
Ip 800kA. J port did not couple so well, despite using 270 phasing. Next shot. Same current. Go to 1MW on J. 1.5MW on D+E. |
| Oct 1 2012 02:53:07:787PM | 1121001020 | Ken Liao | Full length plasma
Ip 800kA. J port did not couple so well, despite using 270 phasing. Enhancement not really visible at 7.5keV on this shot. Te ~ 3.25keV at top of sawteeth. Next shot. Same current. Go to 1MW on J. 1.5MW on D+E. |
| Oct 1 2012 03:12:07:837PM | 1121001021 | Ken Liao | This time, J port ran cleanly all the way through. Even the power ramp at the end.
Te max ~ 3.25keV. I don't see much enhancement at 5 or 7.5 keV on CXRS. I don't think we are getting enough heating with the 270 degree phasing, despite the cleaner J port function. Go back to heating phase and try again. Next shot. Same current. Change to heating phase. Still at 1MW power on J. 1.5 on D+E. |
| Oct 25 2012 11:18:34:730PM | 1121001022 | Ken Liao | try going back to 180 degree phasing on J
Full length plasma J port runs cleanly at 1MW. D+E at 1.5MW. |
| Oct 1 2012 03:40:47:733PM | 1121001023 | Ken Liao | disruption at 1.53s
1.2MA shot Te ~ 5keV at top of sawteeth J port does not work well. Enhancement is visible at 5keV but not really at 7.5keV. Next shot. Change J port back to 270 phasing Change J port power to 1.5MW, D+E to 1.0MW. Same current and density. |
| Oct 1 2012 04:03:41:877PM | 1121001024 | Ken Liao | disruption at 1.54s
1.2MA shot Te ~ 4.5keV at top of sawteeth. J port works better in 270, mostly clean. Some enhancement at 5keV on core channels, but harder to see at .76m Next shot. Switch to 1MA current., same ICRF power. |
| Oct 3 2012 03:09:56:327PM | 1121001025 | Ken Liao | Back at 1MA.
J port works adequately, one fault Te ~ 4keV at top of sawteeth. Some He3 signal seen at 7.5keV, but not really visible at 10keV. Next shot. Try upping the power to increase fast ion population. Increase D+E to 2.5MW. |
| Oct 1 2012 04:30:25:843PM | 1121001026 | Ken Liao | higher power shot
E port faults a little but J runs cleanly. I-mode at 0.9s Te gets up to 6keV. Despite higher temperature and high neutrons, I see less enhancement on CXRS than shot 25. Is the ICRF heating the ions to the point where I can't see them anymore? Next shot. change field to 4.8T |
| Oct 1 2012 04:41:38:417PM | 1121001027 | Ken Liao | Field change didn't go through, so it was another 5.5T shot, repeat of previous shot.
He3 beam enhancement at 5keV, plenty enhancement at 7.5keV, but not really visible at 8.5keV or 10keV. Te reaches ~5.5keV J port didn't work so well this shot. Next shot. go to 4.8T. |
| Oct 1 2012 04:54:58:857PM | 1121001028 | Ken Liao | 4.8T.
He3 beam enhancement is visible at 8.5keV. It seems almost visible at 9keV but it's hard to tell. Te reaches ~5.5keV RF ran well for the main part of the shot. Next shot. go to 5.2T |
| Oct 1 2012 05:12:09:690PM | 1121001029 | Ken Liao | 5.29T
nice shot. RF ran well. He3 beam enhancement is still visible at 8.5keV. Some enhancement is visible at 9keV as well. Not really visible at 10keV. Te reaches ~6keV Next shot. Locked mode for calibration of HIREX |
| Oct 1 2012 05:22:47:957PM | 1121001030 | Ken Liao | Locked mode for calibration of HIREX
Disrupts too early (.45s) we can try again. |
| Oct 1 2012 05:38:12:373PM | 1121001030 | Ken Liao | locked mode shot, appears to lock briefly before disruption.
Next shot: Go back to 5.5T Ip = 1MA J port, 1.5MW at 270 phasing D+E = 2.5Mw nl04 to 1.0 |
| Oct 1 2012 05:54:20:760PM | 1121001032 | Ken Liao | Full length plasma
RF performs pretty well Beam enhancement is definitely lower than nl04 of 0.8, but we still see decent enhancement at 5keV and very uncertain enhancement at 7keV. Next shot (last). Go to nl04 of 0.6 Also reduce the length of the RF pulse to reduce total joules. J from 0.6-1.0 D,E from 0.5-1.0 |
| Oct 1 2012 06:07:59:937PM | 1121001033 | Ken Liao | Last shot
Full length plasma ICRF did ok Te at top of sawteeth gets up to 6keV We have very clear enhancement of He3 at 7.5keV. Enhancement is very marginally visible at 8.5keV. Beam ran well all day! (except for the digitizers) You da man Edgar! Thanks Steve, Yijun, Steve, everyone who helped. |
| Physics Operator Comments | |||
| Oct 1 2012 08:34:53:917AM | Steve Wolfe | Setting up for MP#695 (Ken Liao, He3 minority heating) SL has agreed to increase initial target density to 7e19 in his new SL_PLAN for today. Load from 1120927017 TF_CURRENT to 154000 (5.5T) PG2 puff from 100 to 150msec (.4 to .55s) B21_proj offset from 0 to .0001 Reduce pg4 from 22 to 20msec note BR_0=-.001, IC_EF4=1320; leave as is for now Load at 1-Oct-2012 08:34:35.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done | |
| Oct 1 2012 08:33:45:760AM | 1121001001 | Steve Wolfe | Shot#1: Data system test cycle All normal traces showing up, got gas (seg1 btop,bmain) |
| Oct 1 2012 10:07:12:690AM | 1121001002 | Steve Wolfe | Shot#2: Plasma attempt Result: Short plasma 0.365sec, PF breaker pulled. OH1 crowbarred after the disruption small bounce in startup. Something comes in at 0.34sec, not sure from where. Control seems reasonable to that point, not a locked mode, although nl04 is a little below target. Next: try again |
| Oct 1 2012 10:21:02:647AM | 1121001003 | Steve Wolfe | Shot#3: try again, no pcs changes plasma full length, nl04 went up to 1e20, may have been partially the He3 puff. Got 3MW RF, clean, including J-port at 1MW. Next: RF is going to raise power on J No PCS changes |
| Oct 1 2012 10:36:58:113AM | 1121001004 | Steve Wolfe | Shot#4:RF is going to raise power on J No PCS changes Result: plasma to 1.7sec, Some D faulting, J ok at 1.3MW, but faulting at higher power after 1.4sec. Outboard structures look cool and calm. Next: drop He3 puff to 100msec |
| Oct 1 2012 10:48:51:620AM | 1121001005 | Steve Wolfe | Shot#5: drop He3 puff to 100msec Load at 1-Oct-2012 10:39:39.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma to 1.7sec, more neuts this time, looks like an I-mode transition around 0.9sec Beam fired, but no beam data Next: Reduce He3 puff to 50msec |
| Oct 1 2012 11:15:16:490AM | 1121001006 | Steve Wolfe | Shot#6: drop He3 puff to 50 msec Increase pg4 from 20 to 22msec in seg1 Load at 1-Oct-2012 10:50:49.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma to 1.7sec, no I-mode this time. J was faulting throughout. Also, no beam signals, although beam may have run? Startup bounce still there Next: increase He3 to 75msec |
| Oct 1 2012 11:31:07:343AM | 1121001007 | Steve Wolfe | Shot#7: Raise He3 puff from 50 to 75msec No startup changes this time. Load at 1-Oct-2012 11:13:56.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma to 1.7, again no I-mode, or maybe a short I-mode phase. J faults through second half of RF pulse, but stays on ok by itself at 1MW after 1.4sec Startup better, the power of benign neglect RF induced density rise has been decreasing shot to shot, we're actually puffing a little B-main in the last half of the pulse Next: repeat, try for steadier RF |
| Oct 1 2012 11:51:10:793AM | 1121001008 | Steve Wolfe | Shot#8: repeat, try for steadier RF Result: plasma, no I-mode, J faulting after .77sec Next: try increasing nl04 to 8e19, see if it helps the RF |
| Oct 1 2012 12:08:45:067PM | 1121001009 | Steve Wolfe | Shot#9: try increasing nl04 from 7 to 8e19, see if it helps the RF NINJA off to avoid interaction with late rf pulse. Load at 1-Oct-2012 11:52:04.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma to 1.7s, neuts down some, J still ratty Worse, if anything. nl04 around 7.5e19. Next: raise He puff to 125msec |
| Oct 1 2012 12:27:17:063PM | 1121001010 | Steve Wolfe | Shot#10: raise He puff to 125msec Load at 1-Oct-2012 12:10:01.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma to 1.75sec J-port is better, still not good. DNB camac worked that time, after Ed took a between shot test and Bob came over and was ready to go in and cycle the crate. Next: Probably more RF changes |
| Oct 1 2012 12:44:37:910PM | 1121001011 | Steve Wolfe | Shot#11: Decrease J-port to 1MW He3 puff back to 75msec Load at 1-Oct-2012 12:31:37.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: PF breaker pulled out in CHECK, need to take a no power shot. Ran the no power with TF breakers still closed but supply off at PLC. No trigger or programming from DPCS anyway, since it sat too long in CHECK Don't know why the breaker pulled, checking fuses just in case. |
| Oct 1 2012 12:59:43:183PM | 1121001012 | Steve Wolfe | Shot#12: Repeat of #11 Decrease J-port to 1MW He3 puff back to 75msec Result: plasma to 1.75s J almost clean at 1MW during main pulse. Still faulting out in second pulse, even at lower power Bad bounce in startup, almost lost it Next: PG4 from 22 to 24msec, IC_EF4 from 1320 to 1310 Otherwise repeat |
| Oct 1 2012 01:09:55:360PM | 1121001013 | Steve Wolfe | Shot#13: PG4 from 22 to 24msec, IC_EF4 from 1320 to 1310 Otherwise repeat Load at 1-Oct-2012 13:00:06.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma to 1.75, possible late I-mode after 1sec J-faults in the middle, then comes back on. Last J pulse gets just over 1MW then faults repeatedly Startup better, no bounce Next: ? |
| Oct 1 2012 01:26:07:400PM | 1121001014 | Steve Wolfe | Shot#14: Reduce J power to 0.5, raise D&E No PCS change Result:plasma to 1.75s RF looks clean J runs to 1.8MW on its own at end of flattop Got another bouncy startup. Next: J power to zero, raise D&E |
| Oct 1 2012 01:39:40:260PM | 1121001015 | Steve Wolfe | Shot#15: J power to zero, raise D&E to 2.5MW No PCS changes Result: plasma to 1.75s, RF faulting toward end of pulse, Jport alone faulting above 1MW. Next: Back to 1MW on J, 1.5 on D&E, Ip to 800kA |
| Oct 1 2012 01:53:30:580PM | 1121001016 | Steve Wolfe | Shot#16: Back to 1MW on J, 1.5 on D&E, Ip to 800kA Load at 1-Oct-2012 13:41:07.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma to 1.7sec, 800kA, Got Prad increase before .5sec, could be crossover J very ratty. Next: Change Bt to 5.0T |
| Oct 1 2012 02:10:22:360PM | 1121001017 | Steve Wolfe | Shot#17: Change Bt to 5.0T (TF_CUR from 154.0 to 142.6) Load at 1-Oct-2012 13:56:00.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: disrupts at .46sec, near crossover. PF breaker pulled after the disruption. Next: decrease Ar from 100msec to 50msec, increase clearin before 0.5sec |
| Oct 1 2012 02:24:04:350PM | 1121001018 | Steve Wolfe | Shot#18:decrease Ar from 100msec to 50msec, increase clearin before 0.5sec from 0 to 0.005, RCUR from .6585 to .6610 Load at 1-Oct-2012 14:16:38.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma full length EFIT says it no longer touches the inner wall at crossover Prad is happy again, J not so much during the main pulse, but gets to 2MW at 1.45sec before it starts faulting. Bt was 5.1, rather than 5.0 Next: back to 5.5T and 1MA |
| Oct 1 2012 02:41:19:533PM | 1121001019 | Steve Wolfe | Shot#19: back to 5.5T (154kA) and 1MA, leave the early gap program and Argon puff as they were on 18 Increase He3 puff to 100msec Going to 1.5MW from J at 270degree phase Load at 1-Oct-2012 14:27:52.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma full length Bad bounce in startup, almost lost it. Runaways early. Touches at crossover again J stays on in main pulse, gets to 2MW on its own, but heating is down from earlier today. J-port pickup is showing up on more signals, not sure about control magnetics Next: PG4 to 26msec, IC_EF4 to 1300A, Argon puff to 75msec, Back to 800kA |
| Oct 1 2012 02:49:54:887PM | 1121001020 | Steve Wolfe | Shot#20: PG4 to 26msec, IC_EF4 to 1300A, Argon puff to 75msec, Back to 800kA Load at 1-Oct-2012 14:38:48.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma to 1.8sec startup better Just kisses the wall at crossover. A few faults on J at 1.5MW, heating looks pretty low Next: Repeat with lower J power |
| Oct 1 2012 03:10:04:797PM | 1121001021 | Steve Wolfe | Shot#21: Repeat with lower J power, no PCS changes Result: plasma to 1.8sec again Neuts look similar Startup still looks good RF ran clean, also the J pulse at EOF ran clean at 2MW No obvious heating from the J pulse though Next: try going back to 180degree on J phase at 1MW, same current, etc. |
| Oct 1 2012 03:24:52:283PM | 1121001022 | Steve Wolfe | Shot#22:try going back to 180degree on J phase at 1MW, same current, etc. , no PCS changes Result: plasma to 1.8sec, very similar neuts, RF clean in main pulse, J faulting at eof Next: Go to 1.2MA |
| Oct 1 2012 03:37:26:310PM | 1121001023 | Steve Wolfe | Shot#23: Current from 0.8 to 1.2MA Load at 1-Oct-2012 15:26:36.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma to 1.55sec, disrupts in early rampdown q95 is right on 3.0 J faulting through flattop and again at EOF Next: reduce pg4, keep clearin up at EOF |
| Oct 1 2012 03:52:11:240PM | 1121001024 | Steve Wolfe | Shot#24:reduce pg4 from 26 to 23msec Keep CLEARIN at 0 until 1.5sec, slow down EF4 ramp after 1.5sec Load at 1-Oct-2012 15:39:50.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Change J back to 270 and changing powers from each Result: plasma to 1.55sec, very similar to 23 More neuts. RF ran almost clean Te close to 4keV at peak of st Next: Try slowing down the RCUR ramp after 1.5sec to try to get rid of rampdown disruption |
| Oct 1 2012 04:08:01:783PM | 1121001025 | Steve Wolfe | Shot#25:reduce pg4 from 23 to 21msec Try slowing down the RCUR ramp after 1.5sec to try to get rid of rampdown disruption Increase OH1 current limits to [-30,30]kA SL wants to change to 1MA, so those shape and limit changes are moot, but leave them anyway Load at 1-Oct-2012 15:57:15.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done TS went red, took the shot anyway because jwh has left the room Result: plasma full length Got TS anyway, RF ran almost clean, one J fault in the middle Can see a drop in neuts on the J fault, but the 2MW at the eof are hardly visible. Next: Raise D&E, no PCS change |
| Oct 1 2012 04:28:37:043PM | 1121001026 | Steve Wolfe | Shot#26: Raise D&E to 2.5MW, same J, no PCS changes Result: plasma full length Got more neuts, I-mode at 0.9sec J ran clean, couple of faults on E Te0 over 5keV Next: Go to 4.8T |
| Oct 1 2012 04:41:21:800PM | 1121001027 | Steve Wolfe | Shot#27: Reduce TF_CURRENT to 134.4kA (4.8T) Result: Plasma full length, Ratty RF Bt was still at 5.5T. I loaded it, but hadn't applied the waveform change first. Operator error. Next: this time actually load with the TF changed |
| Oct 1 2012 04:52:04:693PM | 1121001028 | Steve Wolfe | Shot#28: Go to 4.8T (134.4kA on TF_CURRENT) try that again Load at 1-Oct-2012 16:37:30.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma full length, looks like some ELMs, or maybe they're pickup This time it got to 4.8T, Nice neuts, looks like I-mode, q95=3.14 RF ran clean at 4MW total, 1.5MW from J Next: 5.2T |
| Oct 1 2012 05:07:09:803PM | 1121001029 | Steve Wolfe | Shot#29: Go to 5.2T 148.3kA (and apply it this time) Load at 1-Oct-2012 16:53:49.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma to 1.85sec, again looks like a good I-mode some ELMs, no late pulse from J. Clean RF Next: locked mode cal shot ala 1120927033 |
| Oct 1 2012 05:22:16:047PM | 1121001030 | Steve Wolfe | Shot#30: locked mode cal shot ala 1120927033 Import seg4 from 1120927033, seg2 off seg4 on Increase TF_CURRENT to 154000, increase pg5 (argon) to 200ms from 150ms Pg2 waveform is zero Drop nl04 to 6e19 at 0.5, then below zero Load at 1-Oct-2012 17:14:00.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: disrupted too early? 0.4sec Too much argon, or I shouldn't have dropped the density? Next: reduce pg5 to 100msec |
| Oct 1 2012 05:35:03:787PM | 1121001031 | Steve Wolfe | Shot#31: reduce pg5 to 100msec and try again for lm calibration Load at 1-Oct-2012 17:23:22.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done result: plasma to 0.84sec locks at 0.8sec, mlr declares it good Next: go to nl04=1.0e20, 5.5T |
| Oct 1 2012 06:04:48:103PM | 1121001033 | Steve Wolfe | Shot#33:nl04 to 6e19 after 0.5sec, shorten the RF pulse tp end at 1 sec Load at 1-Oct-2012 17:52:57.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma full length, good neuts, Te close to 6keV at peak of st nl04 falls through rf pulse, max of 8e19, gets down to 6e19 by the end. GH limiter and shoelace didn't get too hot. J ran clean, D and E had some faulting. End of run |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:16:16:710AM | Test | Ok | Data cycle |
| 2 | 09:54:58:693AM | Plasma | Bad | OH comm fault |
| 3 | 10:10:54:153AM | Plasma | Ok | |
| 4 | 10:29:48:977AM | Plasma | Ok | |
| 5 | 10:43:14:993AM | Plasma | Ok | |
| 6 | 11:04:42:790AM | Plasma | Ok | |
| 7 | 11:20:29:287AM | Plasma | Ok | |
| 8 | 11:40:54:797AM | Plasma | Ok | |
| 9 | 12:02:15:837PM | Plasma | Ok | |
| 10 | 12:19:35:970PM | Plasma | Ok | |
| 11 | 12:37:53:977PM | Plasma | Bad | PF breaker pulled, no power shot taken |
| 12 | 12:51:43:737PM | Plasma | Ok | |
| 13 | 01:04:07:880PM | Plasma | Ok | |
| 14 | 01:19:08:923PM | Plasma | Ok | |
| 15 | 01:32:21:690PM | Plasma | Ok | |
| 16 | 01:46:32:320PM | Plasma | Ok | |
| 17 | 02:01:52:107PM | Plasma | Bad | PF Breaker Pulled OH Fuses Checked OK |
| 18 | 02:17:13:977PM | Plasma | Ok | |
| 19 | 02:29:53:470PM | Plasma | Ok | |
| 20 | 02:44:02:253PM | Plasma | Ok | |
| 21 | 03:00:25:890PM | Plasma | Ok | |
| 22 | 03:14:38:903PM | Plasma | Ok | |
| 23 | 03:28:51:040PM | Plasma | Ok | |
| 24 | 03:44:51:230PM | Plasma | Ok | |
| 25 | 04:02:07:830PM | Plasma | Ok | |
| 26 | 04:16:52:560PM | Plasma | Ok | |
| 27 | 04:32:13:413PM | Plasma | Ok | |
| 28 | 04:46:23:960PM | Plasma | Ok | |
| 29 | 05:01:36:173PM | Plasma | Ok | |
| 30 | 05:16:49:633PM | Plasma | Ok | |
| 31 | 05:29:26:340PM | Plasma | Ok | |
| 32 | 05:42:00:800PM | Plasma | Ok | |
| 33 | 05:58:33:930PM | Plasma | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Oct 1 2012 08:15:57:653AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Oct 1 2012 04:56:55:693PM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Before today's run, power supply's ground is set to reflectometry's rack. (For both RF and IF section.) For the ground of RF section, the power supply for new IF section is used. So, New IF section is turned off today. Then, CECE signals are still alived when J antenna is turned on. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Oct 1 2012 06:15:46:653PM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| GPI:
observed a D2 puff from the AB limiter nozzle using the new WIDE2 view from K port horizontal. The puff shows up nicely starting in frame 87. The poloidal and radial extend are visible. The poloidal extent is roughly 28 vertical pixels, to be calibrated with the knowledge that the gap in the AB limiter is 36 vertical pixels. I should grab the actual framees and analyze them. Also I what to compare the images with those of a He puff to see if it is different (possibly due to the Franck-condon dissociation. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||