| Miniproposals | ||||||||||||
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| Operators | |
| Session leader(s): | Jerry Hughes,Alberto Loarte |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Bill Byford,Bill Cochran,Gary Dekow |
| Engineering Operator Run Comment |
| Mini Proposal MP 564 |
| Session Leader Plans |
| Entered: Sep 1 2009 04:47:44:753PM |
| Author: Jerry Hughes |
| Prep:
Overnight bake at 60C. ECDC in D2 Working Gas Species: Deuterium ICRF at 80 MHz up to 5 MW with <= 1 s flat top Special gas puffing: none Non-axisymmetric Coils (Connections, Current); Standard configuration Diagnostics needed: Core and edge Thomson for temperature and density profiles. ECE for both pedestal and core temperature profiles. HIREX for ion temperature and rotation profiles. CXRS with DNB for ion temperature measurements, if available. Bolometry for radiation profile measurements. Visible Bremsstrahlung for Zeff measurements. Fast magnetic pick-up coils, PCI, and Reflectometry for fluctuation measurements. Fast scanning probes for SOL measurements for low PSOL conditions, if possible. Divertor probes and IR (if available) for divertor characterization. Shot Plan A. EDA Configuration (unseeded plasmas) Start with 1090827012. A.1. L-mode target nl04 = 8x1019 m-2. A.1.a. Ramp ICRH power to 3 MW in 600ms to determine H-mode threshold. If PLH very high, then try to lower X-point. A.1.b. Step ICRH power up during shot: Picrh = Plh -0.2MW for 500ms Picrh = Plh +0.3MW for 500ms A.1.c. Step ICRH power up during shot: Picrh = Plh +0.8MW for 400ms Picrh = Plh +1.3MW for 300ms Picrh = Plh +1.8MW for 300ms A.1.d. Step ICRH power up during shot: Picrh = Plh +2.3MW for 400ms Picrh = Plh +2.8MW for 300ms Picrh = Plh +3.2MW for 300ms A.2. L-mode target nl04 = 1.1x1019 m-2. A.2.a. Ramp ICRH power to 4MW in 800ms to determine H-mode threshold. If density and/or neutral pressure is too high to make this work, then lower target density and repeat. A.2.b. Step ICRH power up as in A.1.b. A.2.c. Step ICRH power up as in A.1.c. A.2.d. Step ICRH power up as in A.1.d. A.3. If A.2 was successful, go to L-mode target nl04 = 1.4x1019 m-2. A.3.a. Ramp ICRH power to 5MW in 1000ms to determine H-mode threshold If density and/or neutral pressure is too high to make this work, then lower target density and repeat. A.3.b. Step ICRH power up as in A.1.b. A.3.c. Step ICRH power up as in A.1.c. A.3.d. Step ICRH power up as in A.1.d. A.4. If fewer than 4 hours have been consumed, go to L-mode target nl04 = 5x1019 m-2. If density is too low to make this work, then raise target density and repeat. A.4.a. Ramp ICRH power to 5MW in 1000ms to determine H-mode threshold. A.4.b. Step ICRH power up as in A.1.b. A.4.c. Step ICRH power up as in A.1.c. A.4.d. Step ICRH power up as in A.1.d. Mid-run, go to part B: ELMy H-mode Configuration (unseeded plasmas) B. Basically, repeat the density/power programs in part A. with the JFT-2M shape. A good target is 1080304029. (kappa=1.45, delta_L=.75, delta_U=0.15 (RXL~51cm, ZXL~-37cm)). |
| Physics Operators Plans |
| Entered: Sep 1 2009 03:53:37:123PM |
| Author: Earl Marmar |
| Physics Operator plan and Engineering setup for Wednesday, September 2, 2009
MP564 - Power requirements for high confinement H-modes & role of Prad spatial distribution ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1090827006 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) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) leave NINJA as is DISABLED Enable gatevalves and shutters: ECE, VUV, Z-bolo Torvac gatevalve toggle (yes/no): No Boronization(yes/no): no Overnight ECDC (yes/no): Yes ICRF(yes/no): yes LH(yes/no): no DNB(yes/no): No Cryopump (yes/no): no Vessel temperature: 60/60/60 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s |
| Session Leader Summaries |
| Entered: Sep 3 2009 11:18:50:210AM |
| Author: Jerry Hughes |
| Session Leader Summary
Run 1090902 MP564: "Power requirements for high confinement H-modes and the role of radiated power spatial distribution" by Loarte et al. SL: J. Hughes, A. Loarte PO: E. Marmar EO: Byford, Cochran, Dekow This run was intended to provide a set of steady H-mode discharges with varied levels of net power, spanning a range of pedestal regimes (e.g. EDA/ELMy/dithering). The levels of power required to access these H-mode regimes, and to obtain the associated confinement, are to be related to the H-mode power threshold for each discharge configuration. In the second part of this experiment, to be run at a later time, these results will be compared with impurity-seeded discharges with matched net power. This run appears to have produced a useful set of data. The first half of the run used an equilibrium and density program geared toward EDA H-modes: Ip=800kA, Bt=5.4T, kappa=1.5, delta_U=0.23, delta_L=0.53. The X-point was held relatively high in order to hold the outer strike point above the belt of tungsten tiles and thus prevent W injections. (When the strike began to drift down around shot 5, injections became a problem, and it had to be corrected. The move did not appear to increase the L-H power threshold.) In this configuration we obtained useful H-modes with power scans at target (shots 1--7) and 2.1x10^20m^-3. (shots 8--12). Most H-modes were clearly EDA, while the high-power, high-density shot 12 appeared to exhibhit a number of small ELMs. Attempts to run (2.6x10^20m^-3) and lower (1.1x10^20m^-3) target densities did not yield useful H-mode data (shots 13--15), although for completeness the L-H power threshold was evaluated at the lowest density. Beginning mid-day, we focused on the "JFT2M" shape (Ip=800kA, Bt=5.4T, kappa=1.5, delta_U=0.15, delta_L=0.75), in an effort to access H-mode with large ELMs. Our initial series of power scans in this shape at with auxiliary ICRF power of 4MW (shots 16--18, 20 and 22). By lowering the target density to 1.2x10^20m^-3, we managed to get the large ELMing regime back (shots 23--24). Given that we could span EDA and ELM-free in this configuration (a fact we knew from prior studies), I began to wonder why we didn't do the experiment entirely in the JFT2M shape. Soon I was glad we hadn't tried that. Big impurity injections began to plague the JFT2M shape, particularly at high power (shots 20, 22, 25, 26). Sometimes the injections were W, and sometimes they were unidentifiable. We couldn't localize the problem, but we began to suspect that having the strike point in the slot was the culprit. Dennis Whyte reminded us, in particular, that a tile was intentionally removed from the divertor floor for this campaign, and might be a problem area. Increasing the radial position of the X-point and strike (shot 27) was not terribly helpful, but after a big shift inward (shot 28 onward), the injections were not repeated. The last 5 shots were thus run in a slightly modified "JFT2M" equilibrium, with the LCFS coming within mere millimeters of the inner nose, and the outer strike landing on the corner of the EF1 shelf. This produced some interesting results. Good ELMs were readily obtained, and a power scan was performed at target 1.3x10^20m^-3. There were signs that the ELM quality was changing as we increased net power, but this should be looked at further. For the final shot, we wished to resolve the L-H threshold power in this novel shape. P_LH was very low in the "classic JFT2M" shape, with only ~250kW of ICRF needed to trigger H-mode. For shot 32, in the "double-grazing JFT2M" configuration, power was ramped cleanly from 400kW to 2MW. A classic H-mode transition occured at a somewhat higher (though not unreasonable) Prf of 1.7MW, but was proceeded by a period at lower power which has the following features: --Strong Te pedestal --Weak density pedestal, with no clear bifurcation in particle transport --H_98 > 1 --quasi-coherent mode activity, on both reflectometry and magnetics, that spins UP in frequency to ~200kHz This phenomenology is exactly that observed in improved L-mode. To my knowledge, this is the first observation of this set of features in favorable ion grad-B drift direction. Furthermore, this regime was seen with very modest ICRF power (<2MW). This remarkable result is definitely worthy of further examination and exploitation. |
| Physics Operator Summaries |
| Entered: Sep 3 2009 06:24:42:483PM |
| Author: Earl Marmar |
| This was an interesting run from the physop point of view. We explored several equilibria, with outer strike being varied from high on the vertical plate, through the slot (JFT2-M shape) and finally onto the EF shelf to the small R side of the slot. The JFT2-M shapes (strike in the slot) were very prone to disruptions, with Prad problems, but spectroscopy did not see strong W or Mo. Shot 21 died very early, at 120 kA during the current rise, with a spike in hard x-rays right at breakdown. Shot 31 was taken out by an OH crowbar, but no problem was found with the supply. A number of good EDA and ELMy H-modes were produced; see the session leader summary for details. The last plasma shot (32) elicited some logbook comments about similarities to I-mode. The last 2 shot cycles were for gas tests, with no magnet power.
After shot 2, I had the fizzle off time moved back to 1.8 s, so for full length shots the TF did not stay up, and the OH's did not swing hard. Perhaps partly because of disruptions, the OH coax resistances were quite well behaved; we got an OH2U warning on shot 32 (2.63 micro-ohm). Scorecard: 32 plasmas (including 1 very, very early disrupt) 0 fizzles 0 duds 2 tests 34 cycles |
| Session Leader Comments | |||
| Sep 2 2009 09:13:18:473AM | 1090902001 | Jerry Hughes | Loading 1090827012. 800kA, 5.4T. Target nl04 will be 8e19.
Good shot. Goes into H-mode at 2.1MW. EDA H-mode. Next: Go to shot A.1.b. Use power steps of 1.9MW, 2.4MW. |
| Sep 2 2009 09:33:30:687AM | 1090902002 | Jerry Hughes | Got power steps of 1.8MW, 2.3MW.
Good EDAs, goes into H-mode with 1.8MW of ICRF. 2nd EDA is very steady. Pedestal Te is >280eV everywhere. Would like to get something with lower P/P_LH, perhaps. Next shot: Prf = 1.6MW from 0.5--0.9s Prf = 2.8MW from 0.9--1.2s Prf = 3.3MW from 1.2--1.5s |
| Sep 2 2009 09:55:36:367AM | 1090902003 | Jerry Hughes | D-port didn't work properly. So, got power steps of 1.4, 2.2, and 2.5MW
The first step is below threshold. The second triggers EDA H-mode, which is terminated by an W injection. 3rd power step gives a good EDA. Good EDAs, goes into H-mode with 1.8MW of ICRF. 2nd EDA is very steady. Pedestal Te is >280eV everywhere. Would like to get something with lower P/P_LH, perhaps. Next shot: Prf = 1.6MW from 0.5--0.9s Prf = 2.8MW from 0.9--1.2s Prf = 3.3MW from 1.2--1.5s |
| Sep 2 2009 10:11:10:730AM | 1090902004 | Jerry Hughes | Nominal power steps of 1.8, 2.8, and 3.3MW. 1st and 2nd steps have some minor
trips. One portion of the 2nd EDA is getting close to back-transitioning (Te,ped~180eV) No injections. Decent EDA, goes into H-mode with 1.7MW of ICRF. Next shot: Increase each power step by 1MW |
| Sep 2 2009 10:23:58:050AM | 1090902005 | Jerry Hughes | Good start, but W injection kills it. Strike point drifted down a lot relative
to our original shot. Earl will try to fix for next shot. H-mode starts out well enough with Prf=2.4MW, then goes sour after .7s. Next shot: Retry with improved strike. |
| Sep 2 2009 10:38:00:040AM | 1090902006 | Jerry Hughes | Strike is better.
First step (2.7MW RF) of H-mode has variable radiated power. 2nd step (3.7MW RF) is improving, but has some RF trips. 3rd step (4.4MW RF) performs well, transiently. Next shot: Retry with slightly raised strike point. |
| Sep 2 2009 10:52:11:513AM | 1090902007 | Jerry Hughes | Fairly steady H-mode obtained.
RF performed mostly as desired, but we have some injections from J after 1.2s Conclusion is we won't make much progress by going higher in power, due to injections/radiation. Next shot: Go to A.2.a. Power ramp to determine P_LH at the higher target density. |
| Sep 2 2009 11:12:32:523AM | 1090902008 | Jerry Hughes | D+E didn't do so well, so we only got a portion of the power.
Nonetheless, went in to H-mode at a lower power than at the lower density! P_rf~1MW Next shot: RF steps of 0.8MW and 1.3MW |
| Sep 2 2009 11:20:05:823AM | 1090902009 | Jerry Hughes | Got basically the RF demand. Went into EDA H-mode with application of 1.3MW RF.
Good shot. Next shot: RF steps of 1.8MW, 2.3MW, 2.8MW |
| Sep 2 2009 11:35:20:010AM | 1090902010 | Jerry Hughes | D-ant lost early, so we didn't get the highest power
However, did get decent EDA data at Prf=1.8,2.3 Injection kills plasma Next shot: RF steps of 2.8, 3.3, 3.8 |
| Sep 2 2009 11:49:03:813AM | 1090902011 | Jerry Hughes | RF steps of approximately 2.8, 3.3, 3.8MW.
Long EDA H-mode. Some injections, but otherwise radiation reasonably controlled. Next: Raise each power step 1MW, and see what happens. |
| Sep 2 2009 12:21:34:590PM | 1090902012 | Jerry Hughes | Request: 3.8, 4.3, 4.8MW
The average power delivered actually matches this really well. Edge is getting pretty hot, Te,ped ~ 600eV. H98~0.9 beta_N close to 1.3. It looks a lot like small ELMs are showing up on top of this H-mode. Good shot. Next: |
| Sep 2 2009 12:22:40:827PM | 1090902013 | Jerry Hughes | Tried nl04=1.4e20 with power ramp programmed. Only D went.
L-mode. Next: Try one more time with different RF tune. |
| Sep 2 2009 12:39:15:630PM | 1090902014 | Jerry Hughes | RF is still struggling at the higher density.
Alberto and I both agree that we should not waste too much more time in this configuration and get going on the ELMy shots soon. I think we have time to run a low-density power ramp, though, to try for a clearer picture of the low-density thresholds. Next: Try A.4.a. nl04=6e19 |
| Sep 2 2009 01:32:31:477PM | 1090902016 | Jerry Hughes | Dialed up the ELMy shape, with a power ramp. Pretty successful shot.
Low power thrsehold. H-modes look like ELM-free. |
| Sep 2 2009 01:42:34:200PM | 1090902017 | Jerry Hughes | Shot went mostly as programmed. Got power steps of 0.5MW and ~1.5MW.
H-mode triggered with <500kW of ICRF. Don't see a lot of evidence for QCmode on magnetics. Reflectometery catches it with the 88GHz, Amanda reports. We will probably need ELMs to get a real steady state. Should raise power for next shot. |
| Sep 2 2009 01:54:17:953PM | 1090902018 | Jerry Hughes | Got a good steady H-mode at 2MW RF. Didn't get the 3MW at the end of the H-mode.
Pretty EDA looking! Why haven't we done the whole run in this shape? Next: Try for more power; look for ELMs. |
| Sep 2 2009 02:01:03:317PM | 1090902019 | Jerry Hughes | Early disruption. |
| Sep 2 2009 02:24:36:530PM | 1090902020 | Jerry Hughes | That went longer. 2.6MW, then 3.4MW, finally dies by lethal injection.
Still very EDA. |
| Sep 2 2009 02:27:55:610PM | 1090902021 | Jerry Hughes | Early termination. |
| Sep 2 2009 02:57:21:777PM | 1090902022 | Jerry Hughes | A good high power H-mode. Pedestal conditions seem to be about right for ELMs,
but the shot still looks solidly EDA. Another killer W injection. Next: Proceed to a lower density point. nl04=6e19. This was what was used on 1080304027 |
| Sep 2 2009 03:08:10:610PM | 1090902023 | Jerry Hughes | Power ramp at the lower density. Interesting.
Lots of ELMs, fairly large, but with only modest amounts of RF power. Threshold appears to be at the Prf=500kW level. Much confusion over whether these are Type I, III or other. I'm surprised to see pedestal Te of 400eV with such low power. |
| Sep 2 2009 03:09:17:013PM | 1090902024 | Jerry Hughes | Power steps.
Dithering at 250kW. Pretty clear LH threshold there. Good ELMs in the last step, Prf~750kW. |
| Sep 2 2009 03:47:39:403PM | 1090902026 | Jerry Hughes | Peak 2MW of ICRF, complete with injection midway through shot.
At point of peak Te,ped, (t=0.87s) there are a few ELMs. Radiation has become a problem in the early H-mode. Next: Try moving the X-point out. Keep power program the same. |
| Sep 2 2009 03:59:07:253PM | 1090902027 | Jerry Hughes | Disrupted at same time, despite change to x-point position.
Try shifting X-point farther in, see what happens. |
| Sep 2 2009 04:08:36:083PM | 1090902028 | Jerry Hughes | Solution of putting the strike on the inner shelf works.
Actually, the ELMs look great! Unfortunately, no Thomson. So we will retry. |
| Sep 2 2009 04:25:47:030PM | 1090902029 | Jerry Hughes | Initially a decent H-mode with 2.2MW.
Some good ELMs appear. Hard to maintain the H-mode steady with all the RF faults. This shape is working pretty well. Next: try to get more power in. |
| Sep 2 2009 04:41:03:987PM | 1090902030 | Jerry Hughes | Successfully coupled higher power (3--4MW) into this shape.
Confinement is good. (H98>1 early on) ELMs appear to be smaller (more frequent?) Earl suggests that we should check the power threshold in this weird configuration. OK. |
| Sep 2 2009 05:37:41:260PM | 1090902031 | Jerry Hughes | Power supply failure.
But, there was an H-mode with ELMs, briefly, in the Ip ramp down. |
| Sep 2 2009 05:42:10:620PM | 1090902032 | Jerry Hughes | Last shot of the day.
Very interesting. Some debate about when the L-H transition was reveals that from 0.8 to 1.04s, we have something that looks very much like an I-mode. No substantial ne pedestal. Increase in Te,ped. Something like a QCM is observed on magnetics and reflectometry (thanks Arturo and Matt!) H98 touches 1. All at <2MW ICRF. Amazing. |
| Physics Operator Comments | |||
| Sep 2 2009 09:04:42:033AM | 1090902001 | Earl Marmar | load from 1090827012
import segment 1 from 1090901030 nl_04 target to 8e19 (from 9e19) argon enabled (50 ms pulse, starting at 0.3s) plasma, full length EDA H-mode, threshold ~ 2 MW ICRF |
| Sep 2 2009 09:33:18:247AM | 1090902002 | Earl Marmar | no dpcs changes
plasma, full length |
| Sep 2 2009 09:46:59:660AM | 1090902003 | Earl Marmar | no dpcs changes
remove the post discharge TF/OH ramps; we'll monitor the coaxes plasma, full length some impurity issues in the first H-mode, second looks good |
| Sep 2 2009 09:59:49:617AM | 1090902004 | Earl Marmar | tweak the TF rampdown programming
plasma, full length H-mode dithers in the middle (as the RF power decreases), then becomes solid at 3 MW RF |
| Sep 2 2009 10:10:38:480AM | 1090902005 | Earl Marmar | no dpcs changes
plasma disrupt at .85 s, significant impurity injections during RF |
| Sep 2 2009 10:31:33:410AM | 1090902006 | Earl Marmar | increase ZXL by .01 m, to .025 m
plasma, full length efit says the strike point in very close to the gap between tiles 3 and 4 thermocouples give slightly more temperature rise on tile 3 than tile 4 |
| Sep 2 2009 11:07:24:270AM | 1090902007 | Earl Marmar | increase ZXL by .005 m, to .03 m
plasma, full length |
| Sep 2 2009 11:07:08:190AM | 1090902008 | Earl Marmar | nl_04 target to 1.1e20
plasma H-mode threshold is lower at this higher density |
| Sep 2 2009 11:20:51:400AM | 1090902009 | Earl Marmar | no dpcs changes
plasma, full length |
| Sep 2 2009 11:35:58:073AM | 1090902010 | Earl Marmar | no dpcs changes
plasma, disrupts at 1.45 s looks like something came in at about 1.44 s; see big spike on the single channel z-meter, then Prad ramps up. |
| Sep 2 2009 11:48:19:423AM | 1090902011 | Earl Marmar | no dpcs changes
plasma, full length 1 injection early in the H-mode |
| Sep 2 2009 11:47:08:593AM | 1090902012 | Earl Marmar | no dpcs changes |
| Sep 2 2009 12:15:41:090PM | 1090902013 | Earl Marmar | nl_04 target to 1.4
plasma only got D port, no H-mode disrupt in rampdown, 1.78 s (0.4 MA) |
| Sep 2 2009 12:38:58:677PM | 1090902014 | Earl Marmar | nl_04 target to 1.3e20
increase the OH PLC limits (positive swing) to -30, -30, -30 kA plasma very similar to 13 |
| Sep 2 2009 01:02:47:903PM | 1090902015 | Earl Marmar | nl_04 target to 6e19
plasma, full length 5 ELM-free H-modes |
| Sep 2 2009 01:19:31:927PM | 1090902016 | Earl Marmar | go to the JFT2-M shape
import segment 2 from 1080304029 segment 2 call all magnetics predictors (RCUR, ZCUR, ZCUR, CLEARIN, RXL, ZXL, RXU, ZXU) plasma, full length multiple H-modes, no sign of ELMs |
| Sep 2 2009 01:36:04:713PM | 1090902017 | Earl Marmar | no dpcs changes
plasma, full length multiple H-modes |
| Sep 2 2009 01:55:16:517PM | 1090902018 | Earl Marmar | reduce argon puff to 50 ms (from 120 ms)
plasma, full length looks very EDA'ish |
| Sep 2 2009 02:02:49:193PM | 1090902019 | Earl Marmar | no dpcs changes
plasma early disruption, something fell in |
| Sep 2 2009 02:17:33:637PM | 1090902020 | Earl Marmar | tweak the early nl_04 programming, final target unchanged
plasma, disrupt 1.3 s (preceded by large Prad increase) |
| Sep 2 2009 02:33:10:610PM | 1090902021 | Earl Marmar | no dpcs changes
got to about 120 kA and then died evidence of early runaways |
| Sep 2 2009 02:44:08:147PM | 1090902022 | Earl Marmar | increase prefill puff to 23 ms (from 21 ms)
plasma early hards 4 MW ICRF, very steady H-mode, H98~.9 disrupt at 1.12 s (I smell tungsten) |
| Sep 2 2009 02:55:03:823PM | 1090902023 | Earl Marmar | increase prefill puff to 25 ms (from 23 ms)
nl_04 target to 6e19 (from 8e19) plasma, full length no hards RF power just above the H-mode threshold type III ELMS? |
| Sep 2 2009 03:32:00:227PM | 1090902024 | Earl Marmar | no dpcs changes
plasma, full length |
| Sep 2 2009 03:31:25:540PM | 1090902025 | Earl Marmar | no dpcs changes
plasma disrupt 1.06 s, preceded by Prad increase |
| Sep 2 2009 03:37:17:887PM | 1090902026 | Earl Marmar | no dpcs changes
plasma disrupt 0.97 s, preceded by Prad increase |
| Sep 2 2009 03:56:50:080PM | 1090902027 | Earl Marmar | increase RXL .01 m
plasma, disrupt 0.98 s |
| Sep 2 2009 04:13:17:773PM | 1090902028 | Earl Marmar | decrease RXL .02 m (now -.06 m)
plasma, full length ELMs |
| Sep 2 2009 04:30:56:703PM | 1090902029 | Earl Marmar | no dpcs changes
plasma, full length ELMs |
| Sep 2 2009 04:46:47:567PM | 1090902030 | Earl Marmar | no dpcs changes
plasma, full length ELMs seem different (smaller?) Prf reaches 4 MW H98 is slightly above 1 in the first part of the H-mode (3 MW ICRF) |
| Sep 2 2009 04:47:42:413PM | 1090902031 | Earl Marmar | no dpcs changes
plasma disrupt at 0.9 s PF power supply problem(s) took this one out |
| Sep 2 2009 05:02:33:963PM | 1090902032 | Earl Marmar | no dpcs changes
plasma, full length H-mode, ELMs |
| Sep 2 2009 05:27:42:583PM | 1090902033 | Steve Wolfe | Shot#33: Gas test (with no gas) for h-bottom piezo Turned off seg2, drew waveform on H-bottom piezo output_19 The idea is to look for the monitor signal, although I don't know where Willy thinks it may be plugged in. Took the shot, light on HV enable came on, led on Hyb Enable didn't. Apparently, Willy has the relays jumpered anyway. No signal on any of the inputs of SPECTROSCOPY::TOP.X_RAY_PHA:INCAA16 The input_05 is supposed to be this signal, but we know that's connected to a coax that doesn't go anywhere. Input_11 at one time was the in-shot boronization signal, but it's open. Willy and Gary have traced the twisted pair on the monitor output, and it dead-ends at the front of the rack. Will connect to the coax going to input_05. |
| Sep 2 2009 05:46:45:840PM | 1090902034 | Steve Wolfe | Shot#34: Gas test (with no gas) for h-bottom piezo After Gary and Willy connect the twisted pair to the terminal strip where the coax now plugged into input_05 plugs in. And a chopper signal appears on input_05. It shows chopping during the drawn waveform, but also some chopping throughout the pulse at a lower duty cycle. The pulse that is on channel19 in the software fizzle detector also shows up (full on). The hardware f.d. is supposed to cut off the gas either at the hybrid enable or the HV enable or both, but since the relays are actually jumpered for this test the signal still comes through. I probably should move this output off channel 19 to something else that's never been used, but I'll hold off for now. |
| Sep 2 2009 05:47:40:827PM | 1090902034 | Steve Wolfe | After shot#34, I reloaded PCS from shot#32, so tomorrow's startup wouldn't be from the gas test shots (although Ian will be loading his own, anyway.) |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:00:03:330AM | Plasma | Ok | |
| 2 | 09:17:07:960AM | Plasma | Ok | |
| 3 | 09:35:18:453AM | Plasma | Ok | |
| 4 | 09:48:08:863AM | Plasma | Ok | |
| 5 | 10:03:56:900AM | Plasma | Ok | |
| 6 | 10:21:00:157AM | Plasma | Ok | |
| 7 | 10:38:27:367AM | Plasma | Ok | |
| 8 | 10:54:06:543AM | Plasma | Ok | |
| 9 | 11:09:55:497AM | Plasma | Ok | |
| 10 | 11:22:59:523AM | Plasma | Ok | |
| 11 | 11:35:48:730AM | Plasma | Ok | |
| 12 | 11:52:30:127AM | Plasma | Ok | |
| 13 | 12:08:05:197PM | Plasma | Ok | |
| 14 | 12:27:54:170PM | Plasma | Ok | |
| 15 | 12:41:08:693PM | Plasma | Ok | |
| 16 | 01:07:51:047PM | Plasma | Ok | |
| 17 | 01:28:47:117PM | Plasma | Ok | |
| 18 | 01:44:14:403PM | Plasma | Ok | |
| 19 | 01:57:26:237PM | Plasma | Ok | |
| 20 | 02:10:20:697PM | Plasma | Ok | |
| 21 | 02:23:04:810PM | Plasma | Ok | |
| 22 | 02:35:39:160PM | Plasma | Ok | |
| 23 | 02:48:25:850PM | Plasma | Ok | |
| 24 | 03:01:48:307PM | Plasma | Ok | |
| 25 | 03:14:30:673PM | Plasma | Ok | |
| 26 | 03:30:55:820PM | Plasma | Ok | |
| 27 | 03:47:03:403PM | Plasma | Ok | |
| 28 | 03:59:48:673PM | Plasma | Ok | |
| 29 | 04:13:18:350PM | Plasma | Ok | |
| 30 | 04:26:01:810PM | Plasma | Ok | |
| 31 | 04:39:31:860PM | Plasma | Bad | OH2L Commutation Fault |
| 32 | 04:53:55:383PM | Plasma | Ok | |
| 33 | 05:10:47:017PM | Test | Ok | H-Bottom Gas Test |
| 34 | 05:30:59:477PM | Test | Ok | H Bottom Gas Test |
| System Availability | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Sep 2 2009 08:59:37:440AM | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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