Miniproposals

Miniproposal: 570 Date Filed: 8/21/2009 Title: Boundary layer heat transport experiments in L-mode plasmas First Author: Brian Labombard Session Leader: Brian Labombard (shots 1-34)

Engineering Operator Run Comment

MP570 - Boundary layer heat transport experiments in L-mode plasmas SL:

Session Leader Plans

Entered: Sep 9 2009 03:25:54:673PM

Author: Brian Labombard

Run Plan for 1090910 MP#570 - Boundary layer heat transport experiments in L-mode plasmas Goal Our goal today is to first fill in the 4 tesla, 0.8 MA entries in Table 1 of the MP and then move on to 0.4 MA discharges as time allows. Setup NINJA should be filled to 8 PSI D2. Reload shot#1090825005. This was 0.8MA, 5.4 tesla, NL04~0.4e20 shot. Probe targeting was optimum. Strike-point sweep was also very good. Program a Bt ramp-down, starting as soon as possible, to arrive at 4.0 tesla at around 0.5 seconds. OH1 cross-over in 0.8 MA shots should not bother us since it occurs early enough in time. OH1 cross-over control should be used on the 0.4 MA shots. The 0.4 MA shots will have low heat flux on the divertor target. So we will be keeping a close eye on the divertor Lanmguir probes to provide the heat-flux footprint profiles. Last time, probe #6 provided the best footprint profile, but it has since become damaged. So we may need to tweak the RXL sweep a bit. A. LSN, 4.0 tesla, 0.8 MA NL04~ 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6e20 Two shots at each density, probes scanning to resolve shear layer. B. LSN, 4.0 tesla, 0.4 MA NL04~ 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8e20 Two shots at each density, probes scanning to resolve shear layer.

Physics Operators Plans

Entered: Sep 9 2009 04:24:02:877PM

Author: Jim Irby

MP570 - Boundary layer heat transport experiments in L-mode plasmas (day 2) SL: LaBombard PO: Irby ----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1090825005 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) fill NINJA with 10 psi D2 DISABLED Enable gatevalves and shutters: ECE, VUV, DNB, Z-bolo Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): yes ICRF(yes/no): no LH(yes/no): no DNB(yes/no): no Cryopump (yes/no): no Vessel temperature: 35/35/35 --------------- ECDC Parameters --------------- gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s

Session Leader Summaries

Entered: Sep 10 2009 11:30:28:713PM

Author: Brian Labombard

Run Summary for 1090910 MP#570 "Boundary layer heat transport experiments in L-mode plasmas" We cranked out another productive run for the MP today. This time, we completed two 4.0 tesla density scans at 0.8 MA and 0.4 MA. Initially, there was some concern that divertor Langmuir probe #6 would not operate today - not a good thing, since we would be relying heavily on its data to record the heat flux 'footprints', particularly for the 0.4 MA data. It had experienced a 'melt event' on shot#10 yesterday when the strike was fixed on it with high-power ICRF in helium plasmas. It went into strong thermionic electron emission, melted and shorted to the vessel. Then on shot #11 yesterday it miraculously un-shorted to the vessel part way through the shot. Fortunately for today, it remained un-shorted and function more-or-less normally, producing reasonable heat-flux profiles - although the probe-projected area will remain in question. Anyway, with this event firmly in mind, we worked ever more diligently today to collect all the 4.0 tesla data for the MP. After a few data system test shots (started before 9:00 am), we began work on the 0.8 MA data set, producing a density scan (4.0 tesla) of NL04 ~ 0.4 to 1.6e20. The behavior of the plasma proceeded similarly to the density scan previously recorded at 1.1 MA and 5.4 tesla (i.e., at the same q_95). Clean IR footprint data were recorded at the low densities (NL04 ~ 0.44 to 0.66) when the divertor was in a low-to-moderate recycling regime. Ohmic H-modes were seen near the end of the flat-top for NL04 ~ 0.66 and 0.84e20. Again, the inner-wall GPI system was able to record the L-H transition, which typically exhibited three or more ELM-like perturbations before a steady H mode was maintained. Some of these ELMs were recorded on the WASP probe as well (shot#9). As the target density was pushed up to NL04 ~ 1 and beyond, the H-modes disappeared and the footprint signature got very weak on the IR system. However, the Langmuir probe array was able to cleanly record the divertor profile (probe #6 operating!), as the strike-point swept past various probes. At NL04 ~ 1.6e20, the divertor was completely detached, ending the density scan. We then proceeded to do the 0.4 MA density scan. At this current, OH1 cross-over occurs during flat-top time, so we employed Steve Wolfe's new DPCS algorithm to mitigate the influence of this event. This worked quite well. The inner gap remained finite and the WASP probe could operate without interruption. As expected, the IR camera had weak signals, even at the lowest densities in these discharges. But at the lowest densities (NL04 ~ < 0.3) we also experienced a surprise -- floating potentials on the divertor probes went below -70 volts near the strike point. This caused the Langmuir probes to not record ion saturation currents (probe bias is maxed out at -100 volts) and therefore not report the heat-flux footprint near the strikepoint. So we kept the plasma density above NL04 ~ 0.35. Marching the density up by 0.1 increments, we completed the density scan at NL04 ~ 0.65e20 with the outer divertor fully detached. Looking at the Langmuir probe profile data in some detail during the run, we detected some differences in the heat-flux footprints, as recorded by the probes on the vertical target plate (probes #1 through #7) and by probe #8 which is on the 'nose tile'. In particular, the parallel heat-flux density appears to be strongest probe #8. It was noted that the field line angle was systematically varying from ~ 0 to 1 degree on probes #1 to #7 as the strike point swept up the plate. While on probe#8, the field line angle was held fixed at around ~1 degree for the entire sweep. In retrospect, we should have scanned the strike point further up beyond probe #8 to map out such differences in more detail. They are potentially very important, bearing on the question of the physics of divertor heat-fluxes at very small field line angles. The last two shots (#33 and 34) were an attempt to do just that - continue the strike point sweep. However, the sweep still did not continue far enough to put probe #8 cleanly in the private zone. We will need to develop this improved strike-point sweep algorithm for the remaining shots in this MP. Shot Log: 1-2 data system tests. 3-LSN,4.0T,0.8MA,NL04~0.4, no probes scanning. 4-LSN,4.0T,0.8MA,NL04~0.4, WASP scanning at 0.75, 1.0, 1.25 seconds Strike point programming is good. Outer divertor probe #6 is operating. ASP,FSP not scanning but should have been... 5-LSN,4.0T,0.8MA,NL04~0.44, ASP(+5), FSP(-11), WASP(rho=-3) scanning at 0.75, 1.0, 1.25 seconds ASP,FSP could be deeper, WASP ok 6-LSN,4.0T,0.8MA,NL04~0.44, ASP(+7), FSP(-9), WASP(rho=-3) scanning at 0.75, 1.0, 1.25 seconds ASP,FSP could be deeper, WASP ok Only first scan of ASP is deep enough - need to change right gap programming. 7-LSN,4.0T,0.8MA,NL04~0.44, ASP(+7), FSP(-8), WASP(rho=-3) scanning at 0.65, 1.0, 1.25 seconds ASP deep on first scan, otherwise data are ok 8-LSN,4.0T,0.8MA,NL04~0.63, ASP(+6.5), FSP(-8), WASP(rho=-3) scanning at 0.7, 1.0, 1.25 seconds H-mode at 1.26 seconds. GPI catches L-H transition, nice data on inner-wall view. 9-LSN,4.0T,0.8MA,NL04~0.66, ASP(+6.5), FSP(-8), WASP(rho=-3) scanning at 0.7, 1.0, 1.25 seconds H-mode at 1.25 seconds - during probe scans. Inner-wall GPI and WASP see L-H dithers (or ELMs?) 10-LSN,4.0T,0.8MA,NL04~0.8to0.87, ASP(+6.5), FSP(-8), WASP(rho=-3) scanning at 0.7, 1.0, 1.25 seconds H-mode at 1.13 seconds ASP deep on first scan. 11-LSN,4.0T,0.8MA,NL04~0.8to0.85, ASP(+6.0), FSP(-8), WASP(rho=-3) scanning at 0.7, 1.0, 1.25 seconds No H-mode this time. 12-LSN,4.0T,0.8MA,NL04~1.0, ASP(+6.0), FSP(-8), WASP(rho=-3) scanning at 0.7, 1.0, 1.25 seconds 13-LSN,4.0T,0.8MA,NL04~1.0, ASP(+6.0), FSP(-8), WASP(rho=-3) scanning at 0.7, 1.0, 1.25 seconds Only first scan of ASP is deep enough - change right gap programming on next shot. 14-LSN,4.0T,0.8MA,NL04~1.0, ASP(+6.0), FSP(-8), WASP(rho=-3, with manual adjustments) scanning at 0.7, 1.0, 1.25 seconds targeting ok 15-LSN,4.0T,0.8MA,NL04~1.2, ASP(+5.0), FSP(-8), WASP(rho=-3, with manual adjustments) scanning at 0.7, 1.0, 1.25 seconds ASP first scan Ok. Target pulls away from WASP. 16-LSN,4.0T,0.8MA,NL04~1.2, ASP(+5.0), FSP(-7), WASP(rho=-3, with manual adjustments) scanning at 0.7, 1.0, 1.25 seconds Targeting ok. WASP needs to be deeper on last scan. 17-LSN,4.0T,0.8MA,NL04~1.38 to 1.45, ASP(+5.0), FSP(-7), WASP(rho=-3, with manual adjustments) scanning at 0.7, 1.0, 1.25 seconds 18-LSN,4.0T,0.8MA,NL04~1.38 to 1.5, ASP(+5.0), FSP(-7), WASP(rho=-3, with manual adjustments) scanning at 0.7, 1.0, 1.25 seconds 19-LSN,4.0T,0.8MA,NL04~1.5 to 1.65, ASP(+5.0), FSP(-7), WASP(rho=-3 + manual) scanning at 0.7, 1.0, 1.25 seconds Target pulls away from ASP and WASP. FSP could be deeper. 20- fizzle 21-LSN,4.0T,0.8MA,NL04~1.5 to 1.7, ASP(+5.0), FSP(-7), WASP(rho=-3 + manual) scanning at 0.7, 1.0, 1.25 seconds targeting OK. Go to 0.4 MA next. 22-LSN,4.0T,0.4MA,NL04~0.3 no probes scanning. No problem with cross-over changing inner gap. 23-LSN,4.0T,0.4MA,NL04~0.27, ASP(+7), FSP(-5), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds Floating potential on outer divertor array is too negative. Need to increase plasma density a bit. WASP is too deep on first scan, not deep enough on last. 24-LSN,4.0T,0.4MA,NL04~0.33, ASP(+7), FSP(-5), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds WASP not deep enough on scans 2 and 3. Divertor probes ok now. 25-LSN,4.0T,0.4MA,NL04~0.35, ASP(+7), FSP(-4), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds 26-LSN,4.0T,0.4MA,NL04~0.45, ASP(+7), FSP(-3), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds WASP could be deeper 27-LSN,4.0T,0.4MA,NL04~0.47, ASP(+7), FSP(-3), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds 28-LSN,4.0T,0.4MA,NL04~0.55, ASP(+8), FSP(-2), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds 29-LSN,4.0T,0.4MA,NL04~0.55, ASP(+9), FSP(-1), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds 30-LSN,4.0T,0.4MA,NL04~0.65, ASP(+9), FSP(-1), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds Divertor is detached now. All probes need to be deeper. 31-fizzle 32-LSN,4.0T,0.4MA,NL04~0.65, ASP(+12), FSP(+4), WASP (15.5,16.7,19.3v) scanning at 0.7, 1.0, 1.25 seconds Targeting ok Reload shot 27 program RXL to continue sweep beyond probe#8 33-LSN,4.0T,0.4MA,NL04~0.46, ASP(+7), FSP(-3), WASP (14.4,15.5,16.5v) scanning at 0.7, 1.0, 1.25 seconds 34-LSN,4.0T,0.4MA,NL04~0.32 to 0.3, ASP(+7), FSP(-3), WASP (14.4,15.5,16.5v) scanning at 0.7, 1.0, 1.25 seconds Excellent data on scanning probes. RXL sweep is still not large enough. We will need to work on this next outing.

Physics Operator Summaries

Entered: Sep 11 2009 04:30:12:177PM

Author: Jim Irby

We began by loading 1090825005 into PCS, an 800 kA, 5.4 T, SLN discharge. A rampdown of the TF field to 4 T by 0.5 s was programmed, and then over the next few shots the strikepoint (RXL) and outer gap (RCUR) were tweaked to optimize the probe target. A few other tweaks were required to RCUR during the rest of the run. It was also necessary to tweak nl04 gains and requested time-history to keep the density flat during the probe scans. The higher densities resulted in some late disruptions, but the probe scans were completed in time to avoid damage to the probes. Changing OH current limits did not solve the disruption problem (plasma for > 1.45 s typical) On shot 22 we went from 800 to 400 kA operation. We enabled Steve Wolfe's oh1_crossover routine to minimize the effects of crossover. This routine worked well to solve the problems we experienced during the 1090825 run. h/(h+d) was very low most of the day. On shots 23 and 24 I allowed the fill pressure to get too low and we had some runaways. Not generally of interest except that the probe sweeps are clearly seen on the hard x-ray signal. The RGA indicated low impurity levels, but the RGA calibration may be in question. A filament to grid short was fixed before the run by tapping on the RGA quad housing. Something fell in on shot 31 resulting in a 55kA "fizzle" and a hard x-ray spike. We had a few data system hangups on probe data. test shots 1,2 plasma 3,4,5,6,7,8,9,10,11,12,13,14,15 16,17,18,19,21,22,23,24,25 26,27,28,29,30,32,33,34 fizzle 20,31(55kA)

Session Leader Comments
Sep 10 2009 09:24:07:113AM	1090910003	Brian Labombard	3-LSN,4.0T,0.8MA,NL04~0.4, no probes scanning.
Sep 10 2009 09:36:49:153AM	1090910004	Brian Labombard	4-LSN,4.0T,0.8MA,NL04~0.4, WASP scanning at 0.75, 1.0, 1.25 seconds Strike point programming is good. Outer divertor probe #6 is operating. ASP,FSP not scanning but should have been..
Sep 10 2009 10:00:54:433AM	1090910005	Brian Labombard	5-LSN,4.0T,0.8MA,NL04~0.44, ASP(+5), FSP(-11), WASP(rho=-3) scanning at 0.75, 1.0, 1.25 seconds ASP,FSP could be deeper, WASP ok
Sep 10 2009 10:24:09:607AM	1090910007	Brian Labombard	7-LSN,4.0T,0.8MA,NL04~0.44, ASP(+7), FSP(-8), WASP(rho=-3) scanning at 0.65, 1.0, 1.25 seconds ASP deep on first scan, otherwise data are ok
Sep 10 2009 10:32:04:170AM	1090910008	Brian Labombard	8-LSN,4.0T,0.8MA,NL04~0.63, ASP(+6.5), FSP(-8), WASP(rho=-3) scanning at 0.7, 1.0, 1.25 seconds H-mode at 1.26 seconds, GPI catches L-H transition, nice data on inner-wall view.
Sep 10 2009 10:53:30:390AM	1090910009	Brian Labombard	9-LSN,4.0T,0.8MA,NL04~0.66, ASP(+6.5), FSP(-8), WASP(rho=-3) scanning at 0.7, 1.0, 1.25 seconds H-mode at 1.25 seconds - during probe scans. Inner-wall GPI and WASP see L-H dithers (or ELMs?)
Sep 10 2009 11:23:20:610AM	1090910010	Brian Labombard	10-LSN,4.0T,0.8MA,NL04~0.8to0.87, ASP(+6.5), FSP(-8), WASP(rho=-3) scanning at 0.7, 1.0, 1.25 seconds H-mode at 1.13 seconds ASP deep on first scan
Sep 10 2009 11:23:49:843AM	1090910011	Brian Labombard	11-LSN,4.0T,0.8MA,NL04~0.8 to0.85, ASP(+6.0), FSP(-8), WASP(rho=-3) scanning at 0.7, 1.0, 1.25 seconds No H-mode this time
Sep 10 2009 11:43:37:117AM	1090910012	Brian Labombard	12-LSN,4.0T,0.8MA,NL04~1.0, ASP(+6.0), FSP(-8), WASP(rho=-3) scanning at 0.7, 1.0, 1.25 seconds
Sep 10 2009 11:43:44:603AM	1090910013	Brian Labombard	13-LSN,4.0T,0.8MA,NL04~1.0, ASP(+6.0), FSP(-8), WASP(rho=-3) scanning at 0.7, 1.0, 1.25 seconds Only first scan of ASP is deep enough - change right gap programming on next shot.
Sep 10 2009 12:13:54:017PM	1090910014	Brian Labombard	14-LSN,4.0T,0.8MA,NL04~1.0, ASP(+6.0), FSP(-8), WASP(rho=-3, with manual adjustments) scanning at 0.7, 1.0, 1.25 seconds targeting ok.
Sep 10 2009 12:14:03:343PM	1090910015	Brian Labombard	15-LSN,4.0T,0.8MA,NL04~1.2, ASP(+5.0), FSP(-8), WASP(rho=-3, with manual adjustments) scanning at 0.7, 1.0, 1.25 seconds ASP first scan Ok. Target pulls away from WASP
Sep 10 2009 12:28:43:610PM	1090910016	Brian Labombard	16-LSN,4.0T,0.8MA,NL04~1.2, ASP(+5.0), FSP(-7), WASP(rho=-3, with manual adjustments) scanning at 0.7, 1.0, 1.25 seconds Targeting ok. WASP needs to be deeper on last scan
Sep 10 2009 12:50:51:367PM	1090910017	Brian Labombard	17-LSN,4.0T,0.8MA,NL04~1.38 to 1.45, ASP(+5.0), FSP(-7), WASP(rho=-3, with manual adjustments) scanning at 0.7, 1.0, 1.25 seconds
Sep 10 2009 12:51:08:023PM	1090910018	Brian Labombard	18-LSN,4.0T,0.8MA,NL04~1.38 to 1.5, ASP(+5.0), FSP(-7), WASP(rho=-3, with manual adjustments) scanning at 0.7, 1.0, 1.25 seconds
Sep 10 2009 01:41:49:973PM	1090910021	Brian Labombard	21-LSN,4.0T,0.8MA,NL04~1.5 to 1.7, ASP(+5.0), FSP(-7), WASP(rho=-3 + manual) scanning at 0.7, 1.0, 1.25 seconds targeting OK.
Sep 10 2009 01:42:30:490PM	1090910021	Brian Labombard	Go to 0.4 MA next
Sep 10 2009 02:02:01:137PM	1090910022	Brian Labombard	22-LSN,4.0T,0.4MA,NL04~0.3 no probes scanning. No problem with cross-over changing inner gap.
Sep 10 2009 02:20:00:577PM	1090910023	Brian Labombard	23-LSN,4.0T,0.4MA,NL04~0.27, ASP(+7), FSP(-5), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds Floating potential on outer divertor array is too negative. Need to increase plasma density a bit. WASP is too deep on first scan, not deep enough on last.
Sep 10 2009 02:39:35:967PM	1090910024	Brian Labombard	24-LSN,4.0T,0.4MA,NL04~0.33, ASP(+7), FSP(-5), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds WASP not deep enough on scans 2 and 3. Divertor probes ok now.
Sep 10 2009 02:58:23:840PM	1090910025	Brian Labombard	25-LSN,4.0T,0.4MA,NL04~0.35, ASP(+7), FSP(-4), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds Data ok.
Sep 10 2009 03:52:07:513PM	1090910026	Brian Labombard	26-LSN,4.0T,0.4MA,NL04~0.45, ASP(+7), FSP(-3), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds WASP could be deeper
Sep 10 2009 03:52:19:890PM	1090910027	Brian Labombard	27-LSN,4.0T,0.4MA,NL04~0.47, ASP(+7), FSP(-3), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds
Sep 10 2009 03:52:28:967PM	1090910028	Brian Labombard	28-LSN,4.0T,0.4MA,NL04~0.55, ASP(+8), FSP(-2), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds
Sep 10 2009 03:52:37:153PM	1090910029	Brian Labombard	29-LSN,4.0T,0.4MA,NL04~0.55, ASP(+9), FSP(-1), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds
Sep 10 2009 04:41:04:920PM	1090910030	Brian Labombard	30-LSN,4.0T,0.4MA,NL04~0.65, ASP(+9), FSP(-1), WASP(rho=-3 & manual) scanning at 0.7, 1.0, 1.25 seconds Divertor is detached now. All probes need to be deeper.
Sep 10 2009 04:49:02:230PM	1090910033	Brian Labombard	a reload of shot 27 program RXL to continue sweep beyond probe#8 33-LSN,4.0T,0.4MA,NL04~0.46, ASP(+7), FSP(-3), WASP (14.4,15.5,16.5v) scanning at 0.7, 1.0, 1.25 seconds
Sep 10 2009 06:02:27:693PM	1090910034	Brian Labombard	34-LSN,4.0T,0.4MA,NL04~0.32 to 0.3, ASP(+7), FSP(-3), WASP (14.4,15.5,16.5v) scanning at 0.7, 1.0, 1.25 seconds Excellent data on scanning probes. RXL sweep is still not large enough. We will need to work on this next outing.

Physics Operator Comments
Sep 10 2009 09:07:15:827AM	1090910003	Jim Irby	loaded from 1090825005 open tree done loaded seg 1 from 1090909031 into seg 1 open tree done nl04 request is 0.4e20/m^2 prefill changed to 24 ms ef4 is -1300 A Ip is -800kA Btor to 4.0 T at 0.1 s loaded open tree done plasma into rampdown neuts/hards ok TF to 4 T by 0.6 s, but close enough for Brian at 0.5 s nl04 at 0.4e20/m^2 SL happy with shot --- poke next one
Sep 10 2009 09:25:54:133AM	1090910004	Jim Irby	faster sweep for SL: RXL decreased 0.005m at 0.5s to -0.01 m point added to RXL at 1.3 s and set to +0.015 m loaded plasma into rampdown
Sep 10 2009 09:43:11:840AM	1090910005	Jim Irby	prefill from 24 to 26 ms loaded plasma into rampdown neuts/hards down current rise slower h-mode at 1.4 s again
Sep 10 2009 09:56:27:637AM	1090910006	Jim Irby	no DPCS changes plasma into rampdown
Sep 10 2009 10:05:55:077AM	1090910007	Jim Irby	RCUR from 0.656 to 0.660 m at 1.513 s -- improve probe target loaded plasma into rampdown
Sep 10 2009 10:34:09:200AM	1090910008	Jim Irby	nl04 request from 0.4e20 to 0.6e20/m^2 loaded plasma into rampdown density ok h/(h+d) 1.5% at 1 s RGA indicates lower impurity levels that seen recently.
Sep 10 2009 10:43:00:313AM	1090910009	Jim Irby	DPCS repeat Plasma into rampdown
Sep 10 2009 11:05:27:500AM	1090910010	Jim Irby	nl04 request from 0.6 to 0.8e20/m^2 loaded plasma into rampdown --- h-mode at 1.12 s h/(h+d) at 5% level
Sep 10 2009 11:08:49:093AM	1090910011	Jim Irby	Repeat plasma into rampdown h-mode is gone?
Sep 10 2009 11:24:41:970AM	1090910012	Jim Irby	nl04 request from 0.8e20 to 1.0e20/m^2 loaded plasma into rampdown density not well controlled before 0.8 s
Sep 10 2009 11:36:00:780AM	1090910013	Jim Irby	nl04 derivative gate extended from 0.4 to 0.6 s (G=3) nl04 prop gain increased from 8 to 9 loaded plasma into rampdown nl04 rise-time a little faster, but still not well controlled
Sep 10 2009 11:49:29:937AM	1090910014	Jim Irby	RCUR from 0.660 to 0.662 m nl04 at 0.47 s increased briefly to get the density up a little faster loaded plasma into rampdown nl04 control looks better
Sep 10 2009 12:09:09:140PM	1090910015	Jim Irby	nl04 from 1.0e20 to 1.2e20/m^2 loaded plasma into rampdown h/(h+d) from 3 to 5%
Sep 10 2009 12:21:02:907PM	1090910016	Jim Irby	RCUR from 0.662 to 0.664 m loaded plasma into rampdown
Sep 10 2009 12:33:58:423PM	1090910017	Jim Irby	nl04 request from 1.2e20 to 1.4e20/m^2 loaded plasma for 1.4724 s --- just notice we lost the RGA following shot 11
Sep 10 2009 12:44:39:780PM	1090910018	Jim Irby	repeat plasma for 1.482 s
Sep 10 2009 12:59:45:973PM	1090910019	Jim Irby	nl04 request from 1.4e20 to 1.6e20/m^2 --- last poke at 1.25 s plasma for 1.44 s --- probes ok
Sep 10 2009 01:21:43:207PM	1090910020	Jim Irby	prefill from 25 to 26 ms RCUR from 0.664 to 0.666 m oh1/oh2l/oh2u limits to [-30,27]/[-30,30]/[-30,30] --- may help disruptions fizzle --- physop silliness both Br and Bz drifted relative to shot 19; Bz by nearly 2 mT
Sep 10 2009 01:36:12:410PM	1090910021	Jim Irby	ef4 from -1300 to -1320 A --- feel good tweak plasma for 1.451 s --- Bz0 back down
Sep 10 2009 01:59:28:210PM	1090910022	Jim Irby	import seg 2 from 1090910007 into seg 2 nl04 request to 0.2e20/m^2 loaded enabled oh1_crossover routine Ip request from 800 to 400 kA loaded plasma into rampdown
Sep 10 2009 02:07:16:590PM	1090910023	Jim Irby	copied seg 2 Ip to seg 1 --- added prop gain at 0.07 s --- modified controller build all loaded plasma into rampdown
Sep 10 2009 02:22:08:390PM	1090910024	Jim Irby	seg 1 and 2 Ip overshoot from 450 to 400 kA (removed overshoot) nl04 request to 0.35e20 from 0.2e20/m^2 loaded plasma into rampdown neuts and hards up --- probe scans can be seen on the signal
Sep 10 2009 02:45:25:873PM	1090910025	Jim Irby	prefill from 26 to 28 ms plasma into rampdown runaways are gone
Sep 10 2009 03:07:43:543PM	1090910026	Jim Irby	nl04 request to 0.45e20/m^2 loaded plasma into rampdown
Sep 10 2009 03:17:40:933PM	1090910027	Jim Irby	repeat plasma into rampdown
Sep 10 2009 03:25:36:077PM	1090910028	Jim Irby	nl04 request to 0.55e20/m^2 loaded plasma into rampdown neuts and hards signal growing..
Sep 10 2009 03:51:52:997PM	1090910029	Jim Irby	prefill from 28 to 30 ms. plasma into rampdown
Sep 10 2009 04:02:32:030PM	1090910030	Jim Irby	nl04 request to 0.65e20/m^2 loaded plasma into rampdown
Sep 10 2009 04:13:02:450PM	1090910031	Jim Irby	repeat 55 kA fizzle --- something fell in...
Sep 10 2009 04:21:46:827PM	1090910032	Jim Irby	prefill from 30 to 32 ms plasma into rampdown
Sep 10 2009 04:43:54:153PM	1090910033	Jim Irby	import seg 2 from 1090910027 into seg 2 extended RXL ramp to 1.5 s --- move strike past probe 8 loaded plasma into rampdown
Sep 10 2009 06:03:58:977PM	1090910034	Jim Irby	nl04 request to 0.3e20/m^2 RXL sweep increased by 5 mm loaded plasma into rampdown

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:25:41:530AM	Test	Ok
2	08:41:19:750AM	Test	Ok
3	09:00:55:827AM	Plasma	Ok
4	09:21:07:797AM	Plasma	Ok
5	09:36:06:043AM	Plasma	Ok
6	09:49:40:060AM	Plasma	Ok
7	10:02:18:840AM	Plasma	Ok
8	10:20:21:187AM	Plasma	Ok
9	10:33:14:967AM	Plasma	Ok
10	10:52:13:407AM	Plasma	Ok
11	11:04:55:407AM	Plasma	Ok
12	11:18:33:313AM	Plasma	Ok
13	11:31:23:487AM	Plasma	Ok
14	11:44:03:010AM	Plasma	Ok
15	11:58:41:110AM	Plasma	Ok
16	12:12:37:640PM	Plasma	Ok
17	12:25:45:640PM	Plasma	Ok
18	12:40:21:797PM	Plasma	Ok
19	12:52:58:763PM	Plasma	Ok
20	01:14:57:473PM	Plasma	Ok
21	01:28:19:020PM	Plasma	Ok
22	01:49:22:817PM	Plasma	Ok
23	02:02:03:433PM	Plasma	Ok
24	02:17:05:827PM	Plasma	Ok
25	02:35:06:747PM	Plasma	Ok
26	02:54:58:263PM	Plasma	Ok
27	03:08:13:500PM	Plasma	Ok
28	03:21:08:763PM	Plasma	Ok
29	03:36:04:403PM	Plasma	Ok
30	03:51:52:420PM	Plasma	Ok
31	04:05:13:920PM	Plasma	Ok
32	04:18:04:577PM	Plasma	Ok
33	04:40:35:230PM	Plasma	Ok
34	04:56:39:780PM	Plasma	Ok

System Availability

Sep 10 2009 08:24:49:797AM

System Available Comment Availability Changed Owner Description Who Can Change Active MHD no secured - tagged out Jun 02 2008 11:03AM (sears) Joe Snipes Active MHD Antenna sears,snipes BES yes 7 horizontal views spread out R_maj=[0.72-0.9m], 3 cm over the tokamak midplane (beam) Jul 09 2009 05:12PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes 2pi (diode+foil), AXA, AXJ, WB3AX, WB4AX, LEDGE-AX working fine. MID-FOILS working fine. The LEDGE/DIV foils still need calibrations applied Aug 27 2009 09:09AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization no Bottle Removed from the Cell, Piezo box on Igloo Removed. System in safe mode for In-Vessel Access May 30 2008 02:25PM (dekow) Jim Irby Boronization dekow,irby CNPA no Single channel CNPA available as of 12/1707 Jun 10 2009 10:22AM (twf) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor no Cyopump hardware is not yet reinstalled in the cell. Jul 14 2009 09:21PM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard CXRS yes The wide-view toroidal array was installed, spatially and absolutely calibrated. There are 7 toroidal chords intersect the beam at the major_R_range=[74.2:83.6]cm. Spatial resolution: 1.2 cm. The F-top wide-view poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[0.65:0.9.]m. Spatial resolution: 1.22 cm. Jul 09 2009 05:16PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 01 2009 09:45AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe Dalsa yes system is aligned and operating; not yet calibrated Jul 14 2009 02:22PM (marmar) Earl Marmar Visible Bremsstrahlung marmar Disruption Mitigation no safely disabled; ready to be dismantled May 28 2008 10:22AM (granetz) Robert Granetz Gas Jet granetz,whyte Divertor IR no   Mar 06 2007 10:50AM  Glen Wurden Divertor IR Digital Video gwurden,terry Divertor IR Spectroscopy no   Mar 06 2007 10:51AM  Glen Wurden Divertor IR Spectroscopy gwurden,terry DNB no power locked & tagged out; gate valve disabled May 28 2008 10:03AM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,gung ECDC no 6/10/09 Magnetron relocated to west wall in cell at H-port. All controls and hardware have been installed but need to be tested prior to full operation. Magnetron Unplugged and Red tagged, PEI breaker red tagged, Safe for In-Vessel Activity Jun 10 2009 02:35PM (dekow) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE yes The lower freq. 16 channels are ready. Still need calibration and signal level adjustments Jul 14 2009 12:15PM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips G-Side Ratiomatic yes Gauge installed. Controller repaired. Aug 23 2009 10:36PM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no 6/10/09: Paddles meggered at 1000 v to machine ground (>300 Mohm) prior to closing the vacuum chamber. Plugs for Power Supply and Controls Unplugged and Red Tagged, Safe for In-Vessel Access Jun 10 2009 01:47PM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby GPC yes Operational. Jul 28 2009 04:23PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPC2 yes Most channels operational. Jul 28 2009 04:23PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 01 2009 09:45AM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes poses no safety hazard for people working around the machine Jun 18 2009 01:04PM (marmar) Earl Marmar H/D Ratio marmar HEAT no Disconnect switch is open, reg tagged and locked. Shunt Trip Breaker is opened. Safe for in-vessel work. Jun 04 2008 12:24PM (dekow) Gary Dekow - Machine Heaters - burke,dekow Hirex Jr yes Hirex-Jr has been installed and tested Jun 17 2009 11:54AM (rice) John Rice High Resolution X-Ray ince,rice Hirex Sr yes currently only one detector is operational, off-axis He-like argon emission Jul 14 2009 10:01AM (rice) John Rice High Resolution X-Ray ince,rice HXR no In safe mode (high voltage turned off) May 27 2008 09:19PM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt ICRF D-Antenna yes operational at 80 MHz Jul 21 2009 04:49PM (wukitch) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna yes antenna and FFT operational Jul 21 2009 04:49PM (wukitch) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes available at 80 MHz and [0,pi,0,pi] phasing Sep 04 2009 10:01AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin Lower Hybrid no Breaker locked and tagged out. Waveguide disassembly started. Open Waveguides have been shorted. May 28 2008 09:47AM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha yes Midplane, WB4-LY, LEDGE-LY all collecting data. WB1-LY not attached. Aug 27 2009 09:10AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke McPherson yes Operating normally Aug 27 2009 09:10AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry Michelson yes Operational. Recalibrated 7/27/09. Jul 28 2009 04:22PM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes Gauges are on. B-bottom is not operating - bad sensor head? Jul 14 2009 09:12PM (labombard) Brian LaBombard Baratron pressure gauges labombard MLP no System is in edge lab. Version 2 drivers ready to test. Needs a student to help work on it. Jul 14 2009 09:20PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard MSE no As of 6/10/09, MSE is calibrated & ready to go. Awaiting DNB. Jun 10 2009 10:34AM (sscott) Steve Scott Motional Stark Effect jinseok,sscott Neutrons yes Neutron detectors are calibrated and ready to go. Voltages will be turned on prior to first plasma. Jun 10 2009 10:35AM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes Operational --- Uncalibrated and needs to be positioned at port Jun 25 2009 05:08PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby NINJA no Capillaries were tested in-vessel. Plenum has a leak and needs fixing. Jul 14 2009 09:14PM (labombard) Brian LaBombard NINJA gas puff labombard,terry PCI yes Operational. Sep 08 2009 02:30PM (ntsujii) Miklos Porkolab Phase Contrast Imaging arai,edlund,ennever,ntsujii,porkolab Penning Gauges yes High voltage is enabled (on during INIT, off during RECOOL). Jun 30 2009 09:42PM (labombard) Brian LaBombard Penning Ionization Gauges labombard Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Jul 01 2009 09:46AM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe Polarimeter no Safe for Machine Entry Sep 14 2007 12:17PM (irby) Jim Irby C-Mod Polarimeter irby Power - Alternator Air Switch yes Checked and Operational as of 06/18/09 Jun 19 2009 08:04AM (irby) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby Power - PEI yes Operational ---- ECDC running as required Jun 19 2009 08:06AM (irby) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby Probe Array - ISD yes Array is operational with new cPCI data system. Probe 14 has open circuit. Jul 14 2009 09:17PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH no LH launcher not installed. Cables are unplugged at the A-port rack. Jul 14 2009 09:16PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes Array is operational with new cPCI data system. Jul 14 2009 09:16PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard Probe Array - UDIV yes Array is operational with new cPCI data system. Probe 13 has a bad cable (open). Jul 14 2009 09:17PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes Since 1090824xxx, all channels are operational. Aug 25 2009 09:31AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP yes System connected to A-port WASP. Needs plasma testing. Jul 14 2009 09:19PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick Sparker yes Sparker now at K-Hor. Set for 100 uA of current. Will up to 200 uA before first plasma Jun 18 2009 01:01PM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin TCI yes System restarted and aligned. Several chords available including NL04. Density Feedback available. Ready for plasma. Jun 18 2009 09:15AM (murray) Jim Irby Two-Color Interferometer irby,murray TS - Core yes 2 lasers working. 15 spatial channels operational. Initial (NOT final) Te calibration applied. ***No ne calibration yet*** Aug 05 2009 08:44AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma,zhang TS - Edge yes Operational, Te calibration is thought to be good. Density is ***uncalibrated*** Aug 11 2009 02:31PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma,zhang Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf XTOMO yes Operating normally Aug 27 2009 09:10AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke