Miniproposals

Miniproposal: 559 Date Filed: 7/23/2009 Title: Species effects on the H-mode threshold in He4(H), D(H), and H(He3) plasmas First Author: Joseph Snipes Session Leader: Joseph Snipes (shots 1-35)

Engineering Operator Run Comment

Session Leader Plan for MP559 Comparison of H-mode threshold in He and D

Session Leader Plans

Entered: Aug 21 2009 03:35:23:450AM

Author: Joseph Snipes

Session Leader Plan for MP559 Comparison of H-mode threshold in He and D Session Leader: Joseph Snipes (ITER) Physop: Ron Parker We will begin the run at 8:00 am following overnight ECDC in helium to remove the deuterium from the walls and hopefully begin the day with nearly pure helium plasmas. We will begin with 1090812013 as a 1 MA, 5.4 T shot with a lower single null equilibrium with a slightly non-standard shape since it has high strike points and an elongation of 1.56 to avoid an apparently protruding row of tungsten tiles in the divertor that led to disruptions last week. 1) The density from that shot will need to be lowered to nl04 = 4 x 10^19 m^-2. We will also start with a helium startup for the pre-puff to avoid deuterium contamination. Program a slow ICRF power ramp from 0.75 MW up to 3 MW to try to find the H-mode threshold. If the H-mode is obtained, we will change to a staircase RF waveform starting just below the previous threshold power and stepping up in 0.25 MW steps for at least 0.1 s each and maybe longer for a few steps. Keep an eye on the neutron rate as a monitor to see if the deuterium is really gone. If the neutron rate is dropping from shot to shot with otherwise similar conditions, that may mean we need to repeat a few shots until the neutron rate stops decreasing. 2) If the H-mode was obtained at nl04 = 4 x 10^19 m^-2, then decrement nl04 by 1 x 10^19 m^-2 steps and repeat to look for the low density limit. 3) If the H-mode was not obtained, we will increment nl04 by 1 x 10^19 m^-2 steps to see if we are below the low density limit for the threshold up to a maximum of nl04 = 9 x 10^19 m^-2, adjusting the power ramp depending on the threshold range. When H-modes are achieved, document the threshold with dedicated staircase power steps near the threshold. Map out the H-mode threshold in helium as a function of density. 4) Changeover to D plasmas by changing the pre-puff to D as well as the main gas puff. Set nl04 = 9 x 10^19 m^-2 and ramp the ICRF from 1.5 to 3 MW to get rid of the helium and replace it with D. Look for changes in the threshold and H-mode characteristics during the changeover to D. Monitor the D content with the neutron rate and Zeff. We may consider ECDC in D between shots if the changeover seems to be taking too many shots. 5) Repeat in D the same density points of the H-mode threshold that were found in helium and compare the threshold. Dedicated staircase power steps should be used to document the threshold as was done in helium. Map out the H-mode threshold as a function of density in D paying particular attention to the low density limit and compare with the helium results. Depending on how slow the changeover goes and how easily the density dependence of the threshold is mapped out in both helium and deuterium, we may extend the run up to 18:00 (midnight here in France).

Physics Operators Plans

Entered: Aug 20 2009 01:35:25:020PM

Author: Ron Parker

Engineering Setup for Run 1090821 ----------------------------------- MP559: Comparison of H-mode threshold in He and D Session leader: Snipes Physop: Parker Run begins at ** 08:00 ** and ends at ** 18:00 ** Power systems as on: 1090812013 Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled Gas setup: Fill B-Top with 6 psi **He** Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1) fill B-side upper with 40 psi **He** Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi **He** Hybrid enabled (PG3) Leave NINJA fill 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 -- all transmitters run on by 7:30 AM! LH(yes/no): no DNB(yes/no): no Cryopump (yes/no): no Vessel temperature: 60/60/60 overnight ------------------------------ ECDC Parameters ------------------------------ gas and pressure: **He** at 5e-5 Torr sweep: 44/45/103 cm scan: 20/120 s --------- Shot Plan --------- We'll start with a segment 1 of 1090804002 for startup in helium, and segment 2 from 1090812013, with the density lowered to 4e19. Note that the feedback P and D gains on nl_04 should be set at 2 for He. This shape should avoid strong interaction with the W tiles. See SL plan for detailed shotplan.

Session Leader Summaries

Entered: Aug 21 2009 06:15:39:753PM

Author: Joseph Snipes

MP559 Comparison of the H-mode threshold in He and D The run went reasonably well despite a couple of air leaks after shot 27 and 33 and a data system hang on shot 33 that cost us a couple of hours. The H-mode thresholds in helium were consistently 2 to 2.5 times the latest deuterium threshold scalings produced by Yves Martin. The H-mode thresholds in deuterium, on the other hand, decreased relative to the scaling for lower density. At high density, the deuterium thresholds were up to 2 x the scaling, but at moderately low density, the thresholds were down to 1.2 - 1.3 times the scaling. In absolute terms, the threshold at nebar = 1.5 x 10^20 m^-3 was 1.9 MW = POH + 0.9*PRF - dW/dt in deuterium whereas in helium, the threshold was about 3.4 MW, which is a factor of 1.8 times higher in helium. More detailed analysis needs to be done to determine more precisely the differences between the helium and deuterium thresholds, but it is clear that the threshold is considerably higher in helium than it is in deuterium, by at least 40% or more. The results are therefore more consistent with the JET results than with the recent ASDEX Upgrade results and are not very good news for ITER. If these results extrapolate directly to ITER, it will be difficult for ITER to achieve H-mode before deuterium is introduced. However, given the differences between machines, a better physics understanding is required to extrapolate these results to ITER.

Physics Operator Summaries

Entered: Aug 21 2009 06:14:07:363PM

Author: Ron Parker

The run started slowly with several early disruptions and fizzles, mainly caused by too much gas from the fill pressure and post breakdown gas pulses. Finally, after tuning up, a full length discharge was produced in helium on shot 7, and from then on the machine ran well through shot 27, including the scheduled transition from helium to deuterium on shot 17. However, after shot 27 a leak developed which took the pressure up to the mid -5 range. After turning off the cooling, the leak sealed itself and plasma operation was resumed without consequence. However, the leak reappeared and became serious on shot 33. At the same time a data system hangup occurred. After the data system problem was fixed and the cooling turned off to reseal the leak, only one more shot could be run before the scheduled end of the run at 6:00 PM. (But it was worth it.) One other problem that occurred early on was a problem with the J-port transmitter crowbar, which took the J antenna out of operation for the day. This limited the maximum power to ~ 3.4 MW, which was a bit unfortunate for the H-Mode threshold studies. Overall, the run produced useful and interesting data on the threshold in He relative to D2, not as much as one would have wanted from the extended run, but nevertheless of good quality and value. Scorecard: 34 plasma attempts, 5 fizzles, 3 disruptions and 26 full length plasmas

Session Leader Comments
Aug 21 2009 07:59:04:130AM	1090821001	Joseph Snipes	Shot 1: Breaker pulled. Early disruption at 0.41 s. Density needs to be flattened out at nl04 = 4 x 10^19 m^-2.
Aug 21 2009 08:28:35:100AM	1090821002	Joseph Snipes	Shot 2: Very similar to shot 1. Need higher density.
Aug 21 2009 08:38:07:527AM	1090821003	Joseph Snipes	Shot 3: Fizzle.
Aug 21 2009 08:57:02:753AM	1090821004	Joseph Snipes	Shot 4: Slightly better, but disrupted just after 1 s. Got nearly 2 MW of ICRF by that time and no sign of an H-mode. Let's increase nl04 to 5 x 10^19 m^-2 and try again.
Aug 21 2009 09:03:27:067AM	1090821005	Joseph Snipes	Shot 5: Fizzle.
Aug 21 2009 09:28:13:170AM	1090821006	Joseph Snipes	Shot 6: Fizzle.
Aug 21 2009 09:49:14:880AM	1090821007	Joseph Snipes	Shot 7: Good shot. Got > 2.5 times the deuterium threshold scaling values with no H-mode up to 2 MW of ICRF. So, we may be below the low density limit or else the threshold in He is significantly higher than in D. Raise nl04 to 6 x 10^19 m^-2 for shot 8.
Aug 21 2009 10:04:30:463AM	1090821008	Joseph Snipes	Shot 8: Good shot. Got slightly higher density and > 2 times the deuterium threshold scaling values with no H-mode up to 2 MW of ICRF. The RF is tripping out at the higher power. Raise nl04 to 7 x 10^19 m^-2.
Aug 21 2009 10:29:36:070AM	1090821009	Joseph Snipes	Shot 9: Good shot. Got slightly higher density and two brief H-modes. The threshold is about 2 times the D threshold scaling. The first H-mode starts at 2.6 MW. Do a staircase ICRF pulse around the threshold for shot 10.
Aug 21 2009 10:48:21:827AM	1090821010	Joseph Snipes	Shot 10: Good shot. Got two brief H-modes. The threshold is about 2.5 to 2.7 times the D threshold scaling. The first H-mode starts at 2.8 MW.
Aug 21 2009 10:51:27:233AM	1090821011	Joseph Snipes	Shot 11: Good shot. Got a brief H-mode. The threshold is about 2.5 times the D threshold scaling. The first H-mode starts at 2.6 MW.
Aug 21 2009 10:57:11:157AM	1090821012	Joseph Snipes	Shot 12: Good shot. Density set to nl04 = 9 x 10^19 m^-2. H-mode near the end of the RF pulse at just over 3 MW of RF. It is about 2.4 x D threshold scaling.
Aug 21 2009 11:10:37:867AM	1090821013	Joseph Snipes	Shot 13: Try a staircase RF waveform at 3.0, 3.2, and 3.4 MW to narrow down the threshold value. Got a brief H-mode at the end of the RF pulse around 3.3 MW. This corresponds to 2.3 to 2.4 times the D threshold scaling.
Aug 21 2009 11:31:54:233AM	1090821014	Joseph Snipes	Shot 14: Increase nl04 to 1 x 10^20 m^-2. RF ramp from 2.5 MW to 3.4 MW. RF trips out at the highest power levels, but there was no H-mode up to about 3.4 MW.
Aug 21 2009 11:48:56:083AM	1090821015	Joseph Snipes	Shot 15: RF programed at 3.4 MW straight across. Higher power is not available. Got an H-mode with about 3.2 MW of RF. This is about 2.3 to 2.4 x the D threshold.
Aug 21 2009 12:02:52:963PM	1090821016	Joseph Snipes	Shot 16: Raised nl04 to 1.1 x 10^20 m^-2. Keep RF pulse programmed at 3.4 MW. No H-mode with 3.2 MW of RF corresponding to 2.2 to 2.3 x D threshold scaling assuming 90% of the RF power is coupled.
Aug 21 2009 12:29:59:083PM	1090821017	Joseph Snipes	Shot 17: Changeover to deuterium plasmas keeping nl04 = 1.1 x 10^20 m^-2. Ramp the ICRF from 1 MW to 3 MW. Got 3 H-modes with the first at Prf = 2.2 MW. So, the threshold is already lower with only some D. This corresponds to about 2 times the D threshold scaling.
Aug 21 2009 12:40:33:887PM	1090821018	Joseph Snipes	Shot 18: Repeat with higher gain on the density feedback to get the density up to nl04 = 1.1 x 10^20 m^-2. Density rises too much early leading to a MARFE. Then, the density settles down to the requested value. D-port RF antenna tripped out leaving < 1 MW of power. No H-modes.
Aug 21 2009 12:52:13:890PM	1090821019	Joseph Snipes	Shot 19: Fizzle.
Aug 21 2009 01:09:35:380PM	1090821020	Joseph Snipes	Shot 20: Density is fine, but the D port antenna tripped again leaving only just over 1 MW of RF and no H-modes.
Aug 21 2009 01:26:20:043PM	1090821021	Joseph Snipes	Shot 21: Similar to shot 20. The D port antenna tripped again leaving only just over 1 MW of RF and no H-modes.
Aug 21 2009 01:35:57:170PM	1090821022	Joseph Snipes	Shot 22: Similar to shots 20 and 21. The D port antenna tripped again leaving only just over 1 MW of RF and no H-modes. Reduce nl04 to 1 x 10^20 m^-2.
Aug 21 2009 01:46:39:643PM	1090821023	Joseph Snipes	Shot 23: Fizzle.
Aug 21 2009 02:09:52:497PM	1090821024	Joseph Snipes	Shot 24: Good shot with RF ramp from 1 to 3 MW. nl04 = 1 x 10^20 m^-2. No H-modes. Threshold is apparently high in this condition, more than 2 times the D threshold scaling.
Aug 21 2009 02:29:37:410PM	1090821025	Joseph Snipes	Shot 25: RF trips out some of the time, but the power varies from 2.5 to 1.6 MW with 3 H-modes with thresholds 1.5 to 2 x the D threshold scaling.
Aug 21 2009 02:43:10:540PM	1090821026	Joseph Snipes	Shot 26: Good shot. 3 H-modes with RF ramp. First H-mode at 2.7 MW of RF at about 2 x the D threshold scaling. So, the He threshold is about 40% higher than the D threshold in agreement with the JET results and disagreement with the AUG results.
Aug 21 2009 03:00:25:737PM	1090821027	Joseph Snipes	Shot 27: RF steps programmed for 2.6, 2.8, and 3.0 MW to narrow down the threshold. H-mode at the first step with 2.5 MW at 1.8 - 2 x D scaling. Need to repeat starting with lower power.
Aug 21 2009 04:07:03:293PM	1090821028	Joseph Snipes	Shot 28: RF steps programmed for 2.2, 2.4, and 2.6 MW to narrow down the threshold. H-mode at the first step with 2.3 MW at 1.7 - 1.8 x D scaling. Need to repeat starting with lower power.
Aug 21 2009 04:25:57:173PM	1090821029	Joseph Snipes	Shot 29: RF steps programmed for 1.8, 2.0, and 2.2 MW to narrow down the threshold. No H-mode. Move on to lower density for shot 30.
Aug 21 2009 04:41:16:650PM	1090821030	Joseph Snipes	Shot 30: nl04 set to 9 x 10^19 m^-2. RF ramp from 1 - 3 MW. 3 H-modes with the first one at 1.6 MW of RF. This corresponds to 1.5 - 1.6 x D threshold scaling.
Aug 21 2009 04:51:54:823PM	1090821031	Joseph Snipes	Shot 31: nl04 set to 8 x 10^19 m^-2. RF ramp from 1 - 3 MW. 4 H-modes with the first one at 1.4 MW of RF. This corresponds to 1.4 - 1.5 x D threshold scaling.
Aug 21 2009 05:18:13:763PM	1090821032	Joseph Snipes	Shot 32: nl04 set to 7 x 10^19 m^-2. RF ramp from 0.5 - 2.5 MW. 4 H-modes, 1st one at 0.9 MW about 1.2 - 1.3 x D threshold scaling.
Aug 21 2009 05:28:35:770PM	1090821033	Joseph Snipes	Shot 33: nl04 set to 7 x 10^19 m^-2. RF steps from 0.7, 0.9, 1.1 MW. An air leak has opened up again due to cooling like it did before shot 28, but it was not as bad this time. 3 H-modes with the first one just before 0.8 s. However, the RF power data may be lost.
Aug 21 2009 06:09:41:283PM	1090821034	Joseph Snipes	Shot 34: nl04 set to 6 x 10^19 m^-2. RF ramp from 0.5 to 2.5 MW. No power shot due to a data system hang.
Aug 21 2009 06:14:47:880PM	1090821035	Joseph Snipes	Shot 35: nl04 set to 6 x 10^19 m^-2. RF ramp from 0.5 to 2.5 MW. Many H-modes. The threshold is between 1.2 and 1.4 x the D scaling.

Physics Operator Comments
Aug 21 2009 08:03:03:533AM	1090821001	Ron Parker	First shot occurred just before 8:00. The shot disrupted at 0.4 s.
Aug 21 2009 08:30:50:197AM	1090821002	Ron Parker	Shot 2: More or less the same problem as in shot 1, an early disruption. The density during rampup seems too low -- falling to nl_04 ~ 0.16e20 --, so we'll revert to the shot 33 startup from last night, including an early PG 3 pulse.
Aug 21 2009 08:49:17:560AM	1090821003	Ron Parker	Shot 3 fizzled.
Aug 21 2009 09:00:06:160AM	1090821004	Ron Parker	Shot 4 started up better, disrupting after 1 s. RF ramped from 1 to 1.8 MW with no sign of H-mode. Next: Raise density to 5e19.
Aug 21 2009 09:03:18:613AM	1090821005	Ron Parker	Fizzle.
Aug 21 2009 09:16:57:790AM	1090821005	Ron Parker	Delay while RF checks things in power room
Aug 21 2009 09:31:06:577AM	1090821006	Ron Parker	Shot fizzled. Drop the prepuff from 25 to 23 ms.
Aug 21 2009 09:57:21:930AM	1090821007	Ron Parker	Finally success! A full length shot, RF ramps up close to 3 MW, density during RF increased to 5e19 from 4e19. Next:increase density (nl_04) by 1e19.
Aug 21 2009 10:06:49:420AM	1090821008	Ron Parker	Shot 8 ran full length. It appears that there is a problem with J's crowbar which cannot be fixed without long delay. We are stuck with maximum of 3 MW from D and E. Next: Raise nl_04 to 7e19.
Aug 21 2009 10:21:40:207AM	1090821009	Ron Parker	Again, a full length shot. SW reports two tiny H-modes. Next: Step RF power pulse in 150 - 200 ms each, 2.4, 2.6, and 2.8 MW.
Aug 21 2009 10:33:40:460AM	1090821010	Ron Parker	Shot 10 again ran full length. RF stepped and H-mode transitions transiently occurred at RF power of 2.7 MW Next: Raise density another 1e19 with ramped RF
Aug 21 2009 10:45:53:793AM	1090821011	Ron Parker	Shot 11 ran full length, RF ramped and an H-mode appeared at about 2.6 MW. Next: Raise density by another 1e19 on nl_04. RF ramp start at 1.5 MW instead at 1.0 MW
Aug 21 2009 10:56:02:017AM	1090821012	Ron Parker	Shots continue to roll, another one at full length. Next: Staircase 2.8, 3.0, 3.2 MW -- same density as in shot 12
Aug 21 2009 11:10:45:880AM	1090821013	Ron Parker	Good shot, with H-mode transition at 3.3 MW, confirming ramp threshold.But RF trips and so H-mode is not sustained. Next: Increase density again by 1e19 on nl_04
Aug 21 2009 11:30:13:577AM	1090821014	Ron Parker	Shot 14 ran well, no H-mode although some RF trips make the conclusion a bit ambiguous. Next: Repeat with 3.4 MW RF pulse
Aug 21 2009 11:47:29:957AM	1090821015	Ron Parker	Shot 15 ran full length. Surprisingly, an H-mode developed at ~ 3.2 MW. Next: Increase n to 1.1e20 (another 1e19)
Aug 21 2009 12:04:26:293PM	1090821016	Ron Parker	Shot 16 ran full length, no H-mode. Next: Change to D2, ramp 1 to 3, same density. P-gain on density feedback increased from 2 to 8.
Aug 21 2009 12:44:23:747PM	1090821017	Ron Parker	Shot 17 ran full length. Gain change on nl_04 wasn't loaded so density didn't reach 1.1e20. Next: reload with Pgain on nl_04 = 8.
Aug 21 2009 12:48:26:683PM	1090821018	Ron Parker	Shot ran full length, disupting on current rampdown. Prefill and PG 3 puff killed runaways, but resulted in MARFE. Next: reduce density rise demand
Aug 21 2009 12:51:57:077PM	1090821019	Ron Parker	Shot 19 fizzled. Drop prefill by 3 ms, to 22 ms pulse.
Aug 21 2009 01:10:09:240PM	1090821020	Ron Parker	Shot 20 ran full length, RF had trips
Aug 21 2009 01:20:19:103PM	1090821021	Ron Parker	Shot 21 ran full length. RF continues to trip
Aug 21 2009 01:34:31:047PM	1090821022	Ron Parker	Shot 22 was OK, but RF still not up to requested power due to high neutral density. Next: reduce nl_04 to 1e20
Aug 21 2009 01:51:52:647PM	1090821023	Ron Parker	Shot 23 fizzled. Reduce fill by 2 ms, also move pg3 pulse out by 10 ms.
Aug 21 2009 02:07:42:730PM	1090821024	Ron Parker	Shot ran full length, but no H-mode up to 3 MW! Next: Repeat with power up to 3.4 MW
Aug 21 2009 02:44:57:807PM	1090821025	Ron Parker	Shot 25 ran full length.
Aug 21 2009 02:43:01:477PM	1090821026	Ron Parker	Shot 26 ran full length and RF power ramp produced an H-mode at ~2.8 MW. Next: Same pulse, but with steps in RF power.
Aug 21 2009 02:54:50:607PM	1090821027	Ron Parker	Shot 27 ran full length. H-mode developed in first RF step at ~ 2.5 MW. Repeat with lower steps
Aug 21 2009 03:59:56:150PM	1090821027	Ron Parker	Ooops, the base pressure is rising into the mid -5 range. Cell access to investigate. After turning off cooling, the leak appears to have sealed. Base pressure is now in the mid - 7 range and cooling is back on
Aug 21 2009 04:06:42:620PM	1090821028	Ron Parker	In spite of the leak problem, the shot ran full length and the H-mode transition occurred at 2.4 MW. Next:Repeat with different RF steps -- 1.8, 2.0, 2.2
Aug 21 2009 04:20:01:220PM	1090821029	Ron Parker	Shot 29 ran well, full length. No H mode, bracketing the threshold. Next: reduce nl_04 to 0.9e20
Aug 21 2009 04:40:43:447PM	1090821030	Ron Parker	Shot 30 ran full length, H-mode appeared. Next: Lower nl_04 to 8e19.
Aug 21 2009 05:13:04:500PM	1090821031	Ron Parker	Shot 31 ran full length
Aug 21 2009 05:17:31:327PM	1090821032	Ron Parker	Shot 32 ran full length, ramp threshold ~ 0.9 MW. Leak is opening again, so we are slowing the cooling down.
Aug 21 2009 05:33:35:363PM	1090821033	Ron Parker	Shot 33 ran full length, but vessel still leaking Data system problem
Aug 21 2009 06:09:42:377PM	1090821034	Ron Parker	Shot 34 will be a no power shot
Aug 21 2009 06:14:55:240PM	1090821035	Ron Parker	Shot 35 ran full length.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	07:54:22:570AM	Plasma	Bad	PF breaker opened
2	08:20:31:520AM	Plasma	Bad	PF Breaker opened
3	08:35:46:167AM	Plasma	Ok
4	08:48:29:233AM	Plasma	Ok
5	09:01:14:300AM	Plasma	Ok
6	09:26:16:480AM	Plasma	Ok
7	09:38:48:317AM	Plasma	Ok
8	09:55:20:430AM	Plasma	Ok
9	10:11:54:593AM	Plasma	Ok
10	10:24:47:097AM	Plasma	Ok
11	10:37:53:243AM	Plasma	Ok
12	10:50:29:360AM	Plasma	Ok
13	11:04:05:990AM	Plasma	Ok
14	11:24:26:950AM	Plasma	Ok
15	11:40:39:377AM	Plasma	Ok
16	11:54:59:477AM	Plasma	Ok
17	12:19:06:910PM	Plasma	Ok
18	12:34:05:447PM	Plasma	Ok
19	12:48:30:247PM	Plasma	Ok
20	01:01:00:360PM	Plasma	Ok
21	01:15:25:693PM	Plasma	Ok
22	01:29:56:967PM	Plasma	Ok
23	01:44:33:520PM	Plasma	Ok
24	02:01:03:447PM	Plasma	Ok
25	02:15:26:593PM	Plasma	Ok
26	02:33:00:380PM	Plasma	Ok
27	02:47:35:150PM	Plasma	Ok
28	04:00:15:803PM	Plasma	Ok
29	04:13:57:263PM	Plasma	Ok
30	04:30:11:223PM	Plasma	Ok
31	04:44:35:773PM	Plasma	Ok
32	04:57:23:360PM	Plasma	Ok
33	05:17:35:983PM	Plasma	Ok
35	06:09:21:707PM	Plasma	Ok

System Availability

Aug 21 2009 07:54:02:090AM

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/LEDGE/DIV foils still need calibrations applied Jul 28 2009 09:59AM (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. Problem with controller - signal noisy. Jul 14 2009 09:11PM (labombard) 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 for conditioning and testing Jul 21 2009 04:50PM (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 but processed data not in tree. WB1-LY not attached. Jul 07 2009 01:01PM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke McPherson yes Collecting spectra but control system problem is not reporting voltages to tree Jul 28 2009 10:00AM (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 System is operable. Channels 7 and 9 (of 32) are dead. Aug 05 2009 02:48PM (edlund) 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 Starting on 1090819011 only channels 50, 60, 75, 88lsb and 88usb are available. 110, 140 and the variable frequency channel are out of service. Aug 20 2009 03:54PM (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 cables attached, DAQ test run, ready for first plasma Jun 17 2009 03:42PM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke

Aug 21 2009 05:10:34:220PM

alignment looks ok. YAG one cannot be adjusted due to the broken mirror adjustment. Now Yag 1 alignment is perfect on top machine (bot plate) and that's the most important thing.

Aug 21 2009 05:17:18:343PM

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/LEDGE/DIV foils still need calibrations applied Jul 28 2009 09:59AM (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. Problem with controller - signal noisy. Jul 14 2009 09:11PM (labombard) 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 for conditioning and testing Jul 21 2009 04:50PM (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 but processed data not in tree. WB1-LY not attached. Jul 07 2009 01:01PM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke McPherson yes Collecting spectra but control system problem is not reporting voltages to tree Jul 28 2009 10:00AM (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 System is operable. Channels 7 and 9 (of 32) are dead. Aug 05 2009 02:48PM (edlund) 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 Starting on 1090819011 only channels 50, 60, 75, 88lsb and 88usb are available. 110, 140 and the variable frequency channel are out of service. Aug 20 2009 03:54PM (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 cables attached, DAQ test run, ready for first plasma Jun 17 2009 03:42PM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke

Aug 23 2009 04:40:09:900PM

A laser head interlock for YAG2 between shot 34 and shot 35. Shot 34 is a no power shot and met a control problem. Both YAGs fired in shot 33, and only YAG 1 fired in shot 35. The laser head could be overheated due to longer flashing. Sat, 08/22/09 I checked in the lab that the deionized filter for YAG2 was newly replaced on 07/06/09. The water level is reasonable. The water should be pure (there is no LED indicating water purity for YAG2) according to experience. I'll keep an eye on the laser head interlock during Monday run. The top motor alignment has received weak signals since this week. (first plasma Wed afternoon). I tried minor adjustment during Thur and Fri (within 10 steps since last Aug 14). No significant change yet, while the signal level looked normal, so I gave up the trial. I checked the fiber plate today and saw the 3 top alignment fibers stuck out from the holder surface for about half an inch. No doubt these fibers were not on focal plane so that's why the signals were low. I's very likely happened when we took out the fiber plate after Aug 14 run (before Jerry left). I toggle the fibers back and now they are back on the focal plane. Due to only YAG2 operation and bad alignment on Thursday, the cross calibration results was not quite successful. Calculated fudge factors for core channels (not all) are about 1.05~1.10. This verified that the precious calculation is quite close, and the bad alignment gave us information that in extreme case the density should still within 10% error. Shot 1090820029 is a cut-off shot with good bot plate alignment (no idea on top, signals were low). Next wed afternoon Martin will repeat the high density fueling experiment. Now Mirror 1 is fixed by 3 washers so that the HeNe's on TV are well on target. Minor adjustment available for Mirror 2 in x,y direction and Mirror 1 in y direction. Bot motor in perfect alignment Friday. So if everything remains well and YAG2 not affected by Friday laser head interlock, we could get quite good cutoffs.