Miniproposals

Miniproposal: 419 Date Filed: 4/8/2005 Title: Fiducial wall pumping measurements for comparing operating conditions First Author: Bruce Lipschultz Session Leader: Bruce Lipschultz (shots 3-30)

Miniproposal: 430 Date Filed: 7/26/2005 Title: Localization of the effect of boronization First Author: Bruce Lipschultz Session Leader: Bruce Lipschultz (shots 1-2)

Engineering Operator Run Comment

MP#430-Between Shot Boronization PO:Marmar SL:Lipschultz EO:Cochran,Fitz

Session Leader Plans

Entered: Jun 8 2007 08:36:55:703AM

Author: Bruce Lipschultz

MP430 - Between shot boronization ECDC overnight with He in case we change the run. Note - We will be using 10% diborane 90% He mixture. We will be operating at a foreline pressure of 35 mTorr. Probably will not use cryopump because of concern that, even at 77K, it will pump the diborane. Tests are needed. The estimated vapor pressure of diborane at 77K is 0.5mT which may be right at the pressure used for boronization. 1) Take 1-2 shots - 1050805019 is fine (or more recent 1 MA shot). 2.5-3MW or RF requested. Basically our 1 MA standard shot. This will be the un-boronized background 2) Process: Boronization between shots with scan width of 10 cm (200 sec sweep, 20 sec dwell) for a minimum of 10 minutes at first (may want 15 minutes later). Take 2 shots to ascertain the effect. Make sure the last shot returns to shot in step 1. 3) The above sequence (boronization followed by 2 shots) will be started with the resonance centered at 70 cm to ascertain length of boronization. Make it longer if no effect. 4) Boronize sequence (1 shot to measure effect, 2nd shot to determine if it has worn off) using 10 cm wide scans to cover the range 90-50 cm. Work from outer major radius inward in 5 cm steps. (10 shots minimum not including fizzles) 5) Evaluate the effectiveness of boronization through several parameters - the rate of rise of radiation at the beginning of the H-mode, the radiation just before the tramsition, the H-factor, neutron level in H-mode. 5) Once done with the scan, return to the most effective location.

Entered: Jun 8 2007 10:46:44:360AM

Author: Bruce Lipschultz

MP#419 - 'Fiducial wall pumping measurements for comparing operating conditions' Background - We know that the divertor changes to a high-recycling regime as the density is raised. The flux/fluence to the tiles goes up dramatically. The thought is that the surface recombination rate cannot keep up with the flux and the pressure of D2 within the surface rises leading to loacal damage and thus trap sites. Plan for today to address 2 issues raised by past results - 1) The effect of recycling species on retention - Helium does not need to recombine to be released from a surface (the limiting process for D2 which we think leads to the creation of traps). So we will try a density scan in He. These will be 1 MA plasmas, diverted. 2) The effect of the recycling location and flux/fluence. In the case of running inner wall limited plasmas the fluxes are lower (for same core plasma parameters) amd one might expect that the retention would be lower. This, of course, is dependent on the local surface recombination rate. So for this part of the run we will be running inner wall limited discharges (density scan). This will need to be compared to diverted discharges. So first a set of He discharges (diverted, density scan). This will be followed by D plasmas that are diverted in order to convert the main species back over to D. Then we will make inner wall limited discharges. Gate valves need to be closed for 5 minutes after shots. Because we are doing particle balance we would prefer not to have the DNB gate valve open.

Physics Operators Plans

Entered: Jun 7 2007 06:23:56:917PM

Author: Earl Marmar

Engineering Setup for Friday, 8 June 2007; Run 1070608 MP430 - Between shot boronization SL: Bruce Lipschultz PO: Earl Marmar Engineering Setup ------------------ ECDC overnight in Helium, pressure=2e-4 Torr (gauge). Rmin/Rdwell/Rmax = 44/45/103 cm. Bake at 60 C. Run begins at 09:00 and ends at 17:00 Power systems as on 1070605013 Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled We require remote, between-shot control of EF4 to provide vertical field for boronization. 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) pump out NINJA then disable. Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, Z-bolo DNB permissive enabled RF Systems: ---------- LH: not required ICRF: require all 3 antennas (D, E and J). J is in dipole configuration FMIT#1,2,4 in RUN-ON by 08:30 Desire up to 3 MW, 0.5 seconds in H-Mode for the MP Torvac setup ---------- Gate valves open Diborane System ------------------ We will need the diborane system for between-shot boronization. We plan to start the day with the diborane bottle closed. After establishing our target discharge (1 to 2 shots), and making sure all systems are working, the diborane bottle will be opened using SCBA equipped personnel. We expect the power room and cell to remain closed for the duration of the run, but SCBA qualified personnel must be available throughout the day. Start from a shot similar to 1070605013 (1 MA, SNL, target density 1e20 m^-2)

Session Leader Summaries

Entered: Jul 6 2007 11:36:16:393AM

Author: Bruce Lipschultz

MP 419 "Fiducial Wall Pumping Measurements for Comparing Operating Conditions" There were two goals in mind to help understand gas retention in the walls. The working hypothesis is that the retention observed in Mo is not due to co-deposition but rather to ion fluxes implanting D into the near surface of the tiles at a rate faster than recombination of D atoms into molecules can occur at the front surface. This leads to localized high D pressures within the Mo lattice followed by damage, or displacements in the lattice. Such displacements add locations where D2 can reside over and above 'normal' Mo. Such D2 traps can then diffuse through the tile leading to much higher D retention than laboratory experiments would predict. To test this hypothesis 2 experiments were performed: 1) Discharges were made with He as the main gas and recycling species. He does not need to recombine at the front surface since it is a noble gas so recombination is not a limiting process and He ion fluxes should not lead to enhanced pressures and damage within the lattice. 2) By running D2 gas limiter plasmas the ion fluxes to tiles will be lowered at least a factor of 10 compared to diverted discharges where the high recyling condition occurs. Thus the ion flux is smaller compared to the limiting surface recombination rate for D into D2 and again there is less likelihood of pressure-drive damage and trap creation. The torus gatevalves were toggled closed before the discharge so that the gas inventory could be measured following the shot. Initial analysis during the run day indicated that the logic described above is correct; The retention during He and inner wall limited discharges appeared to be low compared to that with D2 diverted discharges. Details: Most of the day was spent with He plasmas. After the first few discharges in He we started a density scn from low density to high, spending a few discharges at each density. The lowest density discharges appeared to have the highest retention normalized to the injected gas. Of course, the injected gas was lower for those discharges as well. The following figure details that density scan. Note that the discharges at nl04~1e20 were the first discharges of the run when we were still converting over to He. We see that as expected the injected gas increases with density. The retained gas, both in absolute value and as a fraction of the injected gas decreases for increasing density. This is opposite to the effect in D2 plasmas. We also had a series of 5 discharges at constant density (15-20) to see if the retention changed (1 MA and nl04 ~ 1e20 m-2). It did not and was low for all those discharges in that sequence. See the folllowing figure. We then moved on to convert over to D2. Shot 21 and 22 were diverted with D2 and the retention was quite high- approaching 100% on shot 21, and then dropping. For the remainder of the run we concentrated on limiter discharges, also at 1 MA and nl04 ~ 1e20 m-2. All of those discharges had very low retention as a fraction of injected gas. See the following figures. Note that we ran into power supply limits trying to achieve the 1 MA limited discharges (too high a loop voltage). Increasing the ps limits and turning on the RF heating helped. Further work is needed to normalize the retention to the ion fluxes to divertor and inner wall limiter. The long-term digitization of the vessel pressure after the discharge exhibited some strange characteristics. Initially the pressure stayed constant or dropped. The effect of the bypass needs to be properly characterized. I believe Jim Irby checked a number of settings for the bypass and came to the conclusion that '175 clicks' was the proper setting to not affect the pumping but still allow some RGA measurement. Later in the day the pressure seemed to steadily rise during the 5 minute gate valve closure. We extended the digitization to 8 minutes which helped but the pressure never properly reached an equilibrium. The volume used in the analysis of gas after the discharge was checked on 1070611 by injecting gas into the vessel. Those results imply that the volume used (3.8m3) should be increased to 3.9 or 3.95 m3.

Physics Operator Summaries

Entered: Jun 8 2007 06:27:14:423PM

Author: Earl Marmar

A relatively calm day for the physop. The machine ran well. We explored helium and deuterium plasmas, SNL and inner-wall limited, with ICRF up to 3 MW on some shots. The original plan to do between-shot boronization was scuttled because of delays at the beginning of the day(getting remote EF4 control checked out, problems on the first EF4 only test, and a breach because of a door lock problem in the power room). We switched MPs, and got 23 plasma shots that should be useful, plus a gas only test at the end of the day, also for the MP. One clear physop observation (probably seen before) is that helium fuels much more effectively than deuterium. The first plasma shot of the day (shot 4) disrupted early, during the current ramp up, with a big marfe and very fast density rise. This is probably related to the ease of fueling with helium. Backing off on the early nl_04 target, and adding some differential gain to the nl_04 feedback solved this problem. One shot disrupted late in flat-top (1 MA) because OH2L hit the PLC limit (shot 25). The negative (after crossover) OH limits were raised to 32 kA for subsequent shots, and adding ICRF also kept the loop voltage lower for these inner wall limited shots. Scorecard: Plasmas 25 fizzle 1 tests 4 total cycles 30

Session Leader Comments
Jun 8 2007 10:46:37:423AM	1070608004	Bruce Lipschultz	shot 4 Tried for He plasma. The gas valve turned off at 0.14s but the density screamed up and the plasma disrupted. No good.
Jun 8 2007 11:13:55:343AM	1070608005	Bruce Lipschultz	shot 5 Barely made it through current rise. injected: 10 torr-l gas remaining: 5.5 wall pumping: 4.5 tl repeat shot
Jun 8 2007 11:27:24:607AM	1070608006	Bruce Lipschultz	shot 6 Much better startup. Jim Irby claims that the ratio of mass 3 to 4 of order 25%. This would mean the D is still high. The low neutron rate would indicate that D is of order 10% in the core. injected: 8.7 torr-l gas remaining: 5.7 wall pumping: 3.0 tl repeat shot
Jun 8 2007 11:42:07:127AM	1070608007	Bruce Lipschultz	shot 7 Same plasma - 1 MA, nl04 ~ 1e20. 3 MW and short H-modes According to Terry's diodes the He recycling (inner wall) drops during the RF pulse and the D_alpha rises. So this may be the source of the H&D we see on the RGA. This shot got mass 3/4 of 25% as well. injected: 8.6 torr-l gas remaining: 7.6 wall pumping: 1.0 tl Next shot turn of RF to see if that affects the RGA and gas retention.
Jun 8 2007 12:09:49:910PM	1070608008	Bruce Lipschultz	shot 8 Same plasma - 1 MA, nl04 ~ 1.0e20. No RF. Disruption at 500 kA. Bypass for RGA closed. injected: 9.6 torr-l gas remaining: 9.8 torr-l wall pumping: 0 tl Go to lower density, open the RGA bypass.
Jun 8 2007 12:08:21:520PM	1070608009	Bruce Lipschultz	shot 9 Same plasma - 1 MA, nl04 ~ 0.6e20. No RF. No disruption. Bypass for RGA open this shot. Ratio of mass 3/4 ~ 44%!! injected: 4.5 torr-l gas remaining: 2.07 torr-l wall pumping: 2.4 tl Repeat.
Jun 8 2007 12:33:05:380PM	1070608010	Bruce Lipschultz	shot 10 Same plasma - 1 MA, nl04 ~ 0.6e20 aned dropping. No RF. no disruption. Bypass for RGA open. Mass 3/4 ~ 40% injected: 5 torr-l gas remaining: 1.73 torr-l wall pumping: 3.3 tl Go to higher density.
Jun 8 2007 12:43:27:643PM	1070608011	Bruce Lipschultz	shot 11 Same plasma - 1 MA, nl04 ~ 0.8e20 aned dropping. No RF. no disruption. Bypass for RGA open. Mass 3/4 ~ 35% injected: 6.4 torr-l gas remaining: 2.5 torr-l wall pumping: 3.9 tl Repeat same density.
Jun 8 2007 12:59:10:707PM	1070608012	Bruce Lipschultz	shot 12 Same plasma - 1 MA, nl04 ~ 0.8e20 and dropping. 3 MWRF. no disruption. Bypass for RGA open. Mass 3/4 ~ 48% injected: 4.8 torr-l gas remaining: 2.6 torr-l wall pumping: 2.2 tl higher density next.
Jun 8 2007 01:13:11:690PM	1070608013	Bruce Lipschultz	shot 13 1 MA, nl04 ~ 1.2e20 and dropping. 3 MWRF. Disruption @400kA. Bypass for RGA open. Mass 3/4 ~ 21% injected: 14.6 torr-l gas remaining: 13 torr-l wall pumping: 1.6 tl same denstiy. Move the RF earlier to see if we can get the density to pump out a little more before current inversion.
Jun 8 2007 01:46:28:580PM	1070608014	Bruce Lipschultz	shot 14 1 MA, nl04 ~ 1.2e20 but stays constant with RF off and no gas puff? 3 MWRF. Disruption @400kA. Bypass for RGA open but at smaller value (100). Unfortunately, the gate valve was closed. Mass 3/4 ~ 88%. injected: 10.9 torr-l gas remaining: 11.4 torr-l wall pumping: -0.5 tl Did the bypass closing make a big difference?
Jun 8 2007 01:45:31:720PM	1070608015	Bruce Lipschultz	shot 15 1 MA, nl04 ~ 1.2e20 but stays constant with RF off and no gas puff? 3 MWRF. Disruption @400kA. Bypass for RGA open but at smaller value - 100 (unfortunately SV3 was closed). Mass 3/4 ~ 88%. injected: 11.6 torr-l gas remaining: 10.8 torr-l wall pumping: 0.8 tl
Jun 8 2007 01:59:13:190PM	1070608016	Bruce Lipschultz	shot 16 1 MA, nl04 ~ 0.95e20 but stays constant with RF off and no gas puff? 3 MWRF. No disruption. Bypass for RGA open @ setting of 175. Mass 3/4 ~ 38%. injected: 7.7 torr-l gas remaining: 5.5 and rising torr-l wall pumping: < 2 tl Repeat - close the bypass some more.
Jun 8 2007 02:12:30:770PM	1070608017	Bruce Lipschultz	shot 17 1 MA, nl04 ~ 0.95e20. 3 MWRF. No disruption. Bypass for RGA open @ setting of 100. Mass 3/4 ~ 70%. injected: 6.2 torr-l gas remaining: 5.5 torr-l and rising! wall pumping: <0.7 tl Repeat - but change gate valve closure to 8 minutes
Jun 8 2007 02:30:26:910PM	1070608018	Bruce Lipschultz	shot 18 1 MA, nl04 ~ 0.95e20. 3 MWRF. No disruption. Bypass essentially closed. injected: 6.9 torr-l gas remaining: 7.0 torr-l and rising! wall pumping: <0 tl Repeat - but no RF
Jun 8 2007 02:41:51:050PM	1070608019	Bruce Lipschultz	shot 19 1 MA, nl04 ~ 0.95e20. No RF. Disruption @ 225 kA. Bypass closed. injected: 7.8 torr-l gas remaining: 8.3 torr-l and rising! wall pumping: -0.5 tl Repeat
Jun 8 2007 02:57:03:067PM	1070608020	Bruce Lipschultz	shot 20 1 MA, nl04 ~ 0.95e20. No RF. Disruption @ 100 kA. Bypass closed. injected: 7.44 torr-l gas remaining: 7 torr-l and rising! wall pumping: 0.4 tl go to D2 next
Jun 8 2007 03:21:40:050PM	1070608021	Bruce Lipschultz	shot 21 Switchover to D2 1 MA, nl04 ~ 0.9e20. No RF. No disruption. Bypass closed. injected: 22 torr-l gas remaining: 5.8 torr-l and rising! wall pumping: > 14 tl small D2 puff at NINJA to see if we can get He CXRS measurement at inner wall
Jun 8 2007 03:32:54:677PM	1070608022	Bruce Lipschultz	shot 22 D2 plasmas 1 MA, nl04 ~ 0.9e20. No RF. No disruption. Bypass closed. injected: 23.6 torr-l gas remaining: 8.4 torr-l and rising! wall pumping: 15.2 tl D2 puff at NINJA for He CXRS measurement at inner wall
Jun 8 2007 03:47:03:723PM	1070608023	Bruce Lipschultz	shot 23 D2 plasmas 1 MA, nl04 ~ 0.9e20. 2 MW RF. No disruption. Bypass closed. injected: 15.4 torr-l gas remaining: 8.7 torr-l and rising! wall pumping: < 6.9 tl Is there an issue with the RF generating gas? D2 puff at NINJA for He CXRS measurement at inner wall
Jun 8 2007 04:00:02:740PM	1070608024	Bruce Lipschultz	shot 24 D2 plasmas Inner-wall limited! 0.8 MA, nl04 ~ 0.9e20. 2.5 MW RF. No disruption. Bypass closed. injected: 6.3 torr-l gas remaining: 6.5 torr-l and rising! wall pumping: < 0 tl Next shot at 1MA, no RF.
Jun 8 2007 04:20:51:863PM	1070608025	Bruce Lipschultz	shot 25 D2 plasmas Inner-wall limited! 1.0 MA, nl04 ~ 0.9e20. No RF. Disruption due to running up against OH2 limit. Bypass closed. injected: 12 torr-l gas remaining: 20 torr-l and rising! wall pumping: < -8 tl Next shot at 1MA again with RF to lower loop voltage and hopefully stay away from administrative limits.
Jun 8 2007 04:31:57:300PM	1070608026	Bruce Lipschultz	shot 26 D2 plasmas Inner-wall limited! Fizzle injected: 0.75 torr-l gas remaining: 1 torr-l and rising! wall pumping: < -.2 tl Next shot at 1MA again with RF to lower loop voltage and hopefully stay away from administrative limits.
Jun 8 2007 04:49:32:487PM	1070608027	Bruce Lipschultz	shot 27 D2 plasmas Inner-wall limited! Almost 3MW of RF. injected: 9.8 torr-l gas remaining: 9.8 torr-l and rising! wall pumping: < 0 tl Next shot at 1MA again with RF to lower loop voltage and hopefully stay away from administrative limits.
Jun 8 2007 05:01:16:830PM	1070608028	Bruce Lipschultz	shot 28 D2 plasmas Inner-wall limited! Almost 3MW of RF. injected: 8.5 torr-l gas remaining: 10. torr-l and rising! wall pumping: < -1.5 tl Repeat
Jun 8 2007 05:15:18:880PM	1070608029	Bruce Lipschultz	shot 29 D2 plasma Inner-wall limited! Almost 3MW of RF. injected: 8.9 torr-l gas remaining: 8.2 torr-l and rising! wall pumping: < 0.7 tl
Jun 8 2007 05:28:58:223PM	1070608030	Bruce Lipschultz	shot 30 gas balance test injected: 20 torr-l gas remaining: 16 torr-l wall pumping: 4 tl

Physics Operator Comments
Jun 8 2007 12:40:21:223PM		Earl Marmar	Because of the delays at the start of the run, we have decided to switch to MP419. These will be He majority plasmas. We will still plan to start from 1070605013 as our target, but B-Main (PG3) is now filled to 32 PSI with Helium-4. Main torus pumping gate valves will be kept closed for 5 minutes after each shot.
Jun 8 2007 09:27:33:173AM	1070608001	Earl Marmar	no-power interlock test
Jun 8 2007 09:32:29:517AM	1070608002	Earl Marmar	ef4 double swing test (loaded from 1070315020, segment 1 on, segments 2, 3 and 4 off) got the negative, did not get the positive swing
Jun 8 2007 10:26:32:313AM	1070608003	Earl Marmar	EF4 double swing test looks ok
Jun 8 2007 10:57:32:313AM	1070608004	Earl Marmar	load from 1070605013 (1 MA, SNL, 1e20 m^-2) import segment 1 from 1070607005 He majority (32 PSI He-4 in PG3) plasma early disruption (.24 s) fast density rise starting at .14 seconds
Jun 8 2007 10:59:13:343AM	1070608005	Earl Marmar	no pcs changes plasma still had early density rise, but it survived density overshoots to 1.5e20 and then comes back down to 1.0 (pre-RF) 9 ELM-free H-modes during ICRF
Jun 8 2007 11:31:44:647AM	1070608006	Earl Marmar	decrease the rate of rise on nl_04 target, still 1e20 after .5 seconds add some derivative gain to nl_04 (gain until .7 seconds) enable argon (B-side lower), 100 msec puff starting at .3 seconds plasma density rise is much better
Jun 8 2007 11:31:58:020AM	1070608007	Earl Marmar	no pcs changes plasma
Jun 8 2007 11:50:19:020AM	1070608008	Earl Marmar	turn off argon puff no PCS changes no ICRF on this shot plasma
Jun 8 2007 12:02:43:410PM	1070608009	Earl Marmar	nl_04 target to 0.6e20 tweak clearin and rcur during current rampdown ICRF still off plasma
Jun 8 2007 12:18:02:410PM	1070608010	Earl Marmar	no pcs changes plasma
Jun 8 2007 12:39:03:597PM	1070608011	Earl Marmar	nl_04 target to 8e19 plasma early hards
Jun 8 2007 01:09:32:050PM	1070608012	Earl Marmar	no pcs changes argon re-enabled ICRF should be back on plasma
Jun 8 2007 01:10:17:270PM	1070608013	Earl Marmar	nl_04 target to 1.2e20 plasma disrupt in rampdown (400 kA)
Jun 8 2007 01:39:52:177PM	1070608014	Earl Marmar	go limited earlier in rampdown (rcur and clearin decreased) plasma
Jun 8 2007 01:40:14:113PM	1070608015	Earl Marmar	no pcs changes plasma
Jun 8 2007 01:50:43:237PM	1070608016	Earl Marmar	nl_04 target to .95e19 plasma
Jun 8 2007 02:10:08:207PM	1070608017	Earl Marmar	no pcs changes plasma
Jun 8 2007 02:17:24:423PM	1070608018	Earl Marmar	increased nl_04 derivative gain to 3 (between .3 and .7 seconds) plasma
Jun 8 2007 02:33:30:707PM	1070608019	Earl Marmar	no pcs changes plasma ICRF off
Jun 8 2007 02:55:38:613PM	1070608020	Earl Marmar	nl_04 target to 9e19 nl_04 derivative gain reduced after .3 seconds (now 3 straight across) plasma
Jun 8 2007 03:19:09:643PM	1070608021	Earl Marmar	switch to deuterium puffing during the shot B-Main to 40 PSI deuterium (was helium-4) plasma
Jun 8 2007 03:29:12:550PM	1070608022	Earl Marmar	no pcs changes plasma
Jun 8 2007 03:43:49:393PM	1070608023	Earl Marmar	6 PSI He-4 into B-side lower (formerly argon) disabled for this shot plasma
Jun 8 2007 04:00:39:270PM	1070608024	Earl Marmar	load from 1070605014 (inner-wall limited) import segment 1 from 1070608023 remove 2 msec from prefill puff (now 16 msec) plasma
Jun 8 2007 04:20:18:347PM	1070608025	Earl Marmar	Ip to 1 MA nl_04 target to 9.5e20 inner-wall limited plasma disrupt 1.4 seconds OH2L hit PLC limit
Jun 8 2007 04:21:46:457PM	1070608026	Earl Marmar	reduce prefill puff 1 msec fizzle
Jun 8 2007 04:49:29:143PM	1070608027	Earl Marmar	no pcs changes plasma with ICRF ramps all the way down
Jun 8 2007 05:12:24:957PM	1070608028	Earl Marmar	no pcs changes plasma
Jun 8 2007 05:12:37:987PM	1070608029	Earl Marmar	no pcs changes plasma
Jun 8 2007 05:30:08:427PM	1070608030	Earl Marmar	gas test copy gas voltage programming for B-Main from 1070608021 to PG3 voltage program in segment 1, turn off segment 2, fizzle detector to 1.7 seconds got the gas

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:08:40:580AM	Test	Ok	EF4 Aux supply interlock test
2	09:22:53:437AM	Test	Bad	EF4 Test Shot
3	10:21:09:953AM	Test	Ok
4	10:37:01:907AM	Plasma	Ok
5	10:52:12:140AM	Plasma	Ok
6	11:12:54:720AM	Plasma	Ok
7	11:28:19:410AM	Plasma	Ok
8	11:41:24:033AM	Plasma	Ok
9	11:55:14:737AM	Plasma	Ok
10	12:16:07:520PM	Plasma	Ok
11	12:29:44:880PM	Plasma	Ok
12	12:45:24:393PM	Plasma	Ok
13	12:58:32:440PM	Plasma	Ok
14	01:13:21:927PM	Plasma	Ok
15	01:28:11:300PM	Plasma	Ok
16	01:40:50:223PM	Plasma	Ok
17	01:54:32:800PM	Plasma	Ok
18	02:11:17:427PM	Plasma	Ok
19	02:28:08:177PM	Plasma	Ok
20	02:41:06:347PM	Plasma	Ok
21	03:04:05:300PM	Plasma	Ok
22	03:19:01:707PM	Plasma	Ok
23	03:32:46:033PM	Plasma	Ok
24	03:47:06:533PM	Plasma	Ok
25	04:03:03:097PM	Plasma	Ok
26	04:19:16:363PM	Plasma	Ok
27	04:35:07:427PM	Plasma	Ok
28	04:48:50:520PM	Plasma	Ok
29	05:02:11:830PM	Plasma	Ok
30	05:15:53:723PM	Test	Ok	Gas System Test

System Availability

Jun 8 2007 09:08:15:407AM

System Available Comment Availability Changed Owner Description Who Can Change Active MHD yes Fully operational Mar 28 2007 09:19PM (sears) Joe Snipes Active MHD Antenna sears,snipes BES yes vertical array of six views at R ~ 87.3 cm, radial array of three views out to R ~ 89 cm, both at outboard midplane. Three discrete fiber views of beam at R ~ 70.0, 76.5 and 82.5 cm. Feb 06 2007 10:00AM (bravenec) Ron Bravenec Beam Emission Spectroscopy bravenec Bolometers yes 2Pi diode operational, 2Pi foil being upgrade for noise resistance. Midplane foils calibrated for senstivity, still need better time constants. Midplane and divertor AXUV being digitized, processing calibration data. May 29 2007 11:22AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization yes First Boronization 5/9/07 May 10 2007 04:55PM (irby) Jim Irby Boronization dekow,irby CNPA no   Jan 14 2007 02:06PM  Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor yes The cryopump is operational in a manual mode. We will be working on interfacing its control system with the C-Mod state machine for semi-automatic operation. May 30 2007 07:58PM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard CXRS yes The pedestal toroidal array was installed, spatially and absolutely calibrated. There are 10 chords intersect the beam at the major_R_range=[75,4:87.4]cm. Spatial resolution: 1.2 cm. The F-top poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[67.8:91.0]cm. Spatial resolution: 1.22 cm. May 01 2007 12:31PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,rachmcd,rowan D Alpha yes \ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are available Mar 11 2007 10:28PM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe Dalsa yes camera is re-installed, and view has been calibrated Feb 26 2007 03:28PM (marmar) Earl Marmar Visible Bremsstrahlung marmar Disruption Mitigation no   Jan 14 2007 02:02PM  Bob 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,ldorf,terry DNB yes All systems are operational, but as of 28 March 2007, the beam needs additional conditioning for full performance shots Mar 28 2007 09:36AM (beals) Bob Granetz Diagnostic Beam beals,granetz FRC-ECE yes All channels now working. Apr 04 2007 11:04AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips G-Side Ratiomatic yes The gauge is operational. Mar 30 2007 10:54AM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland GPC yes Chs 1-8 operational. May 24 2007 08:40AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPC2 yes Most channels (except 1,5,8,10,17) operational. Jun 08 2007 08:29AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPI yes New view just outside of the lower X-point is operational, but data is being archived locally , not to the tree. Midplane GPI is not operational. Mar 27 2007 01:59PM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes spectral calibration needs to be checked, but system should be ready for the run Feb 26 2007 03:28PM (marmar) Earl Marmar H/D Ratio marmar Hirex Jr yes   Mar 06 2007 08:59AM (rice) John Rice High Resolution X-Ray ince,rice Hirex Sr yes Storing Data, but profiles not yet available Apr 27 2007 01:20PM (ince) John Rice High Resolution X-Ray ince,rice HXR yes Something might be wrong with channel 26; all others working fine. Mar 23 2007 10:43AM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt ICRF D-Antenna yes 80.5 MHz. ready Mar 28 2007 08:50AM (ylin) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna no 80 MHz. FFT installation/coaxial line needs more work Mar 16 2007 09:32AM (ylin) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes 78 MHz Apr 04 2007 08:56AM (ylin) Steve Wukitch J-port antenna wukitch,ylin Lower Hybrid no 6B Pressure window failed. Arcing in 6B, 8B,9B & 23B. May 04 2007 03:44PM (dterry) Ron Parker Lower Hybrid dterry,parker LPI yes   Apr 26 2007 08:35PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha yes Midplane data being digitized, processing calibration data. Divertor views showing significant noise, and not available. Upper view being debugged. May 29 2007 11:23AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke McPherson yes Working normally. Apr 19 2007 09:52AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry Michelson yes Operational. Mar 28 2007 08:33AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes E-Top, E-Bottom, F-top (cryo), G-side, and B-bottom are operational. F-top gauge has a 'sniffer tube' to measure pressures in cryopump gas box. Mar 20 2007 06:42PM (g) Brian LaBombard Baratron pressure gauges labombard MLP no Initial tests on the A-port scanning probe went well. We need to take care of some control glitches that caused some component failures. May 30 2007 08:01PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard MSE no (1) Bandpass filters replacement underway (2) Beam-into-gas spectrum measurement underway (3) Shutter mechanism currently unstable; remains open. (4) Expect beam-into-gas calibrations complete about 4/24. Apr 03 2007 12:05PM (sscott) Steve Scott Motional Stark Effect jinseok,sscott Neutrons yes Both neutron systems are fully operational Apr 05 2007 11:19AM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes operational Mar 21 2007 04:29PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby NINJA yes All capillaries displayed by the NINJA_CONTROL GUI have been tested. NINJA puffed on 1070329009 (A-B limiter). Mar 29 2007 11:47AM (terry) Brian LaBombard NINJA gas puff labombard,terry PCI yes The system is to be optimized. May 30 2007 01:12PM (lianglin) Miklos Porkolab Phase Contrast Imaging edlund,lianglin,ntsujii,porkolab Penning Gauges yes 8 in-situ Penning ionization gauges appear to be operational: CB_DivU, CB_OutL, CB_DivL, KA_OutU, KA_OutL, B_DivL, Cryo_1, Cryo_2. Cryo_1 and Cryo_2 are new and installed in the upper cryopump 'gas-box'. Mar 13 2007 10:01PM (labombard) Brian LaBombard Penning Ionization Gauges labombard Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV (without an ND filter) are operational. Mar 27 2007 01:53PM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe Polarimeter no Retro shutter closed Mar 15 2007 11:00AM (irby) Jim Irby C-Mod Polarimeter irby Probe Array - ISD yes Probes at 15 of the 16 poloidal locations ('ramped' geometry) are operational. n,Te, particle flux reported every 10 ms. Mar 13 2007 09:47PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH yes All 6 probes on the lower hybrid launcher (tungsten, 1.5 mm projection) are operational. Mar 13 2007 09:46PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes Probes at 10 poloidal locations (one 'ramped' and one 'flush') are operational. n,Te, particle flux reported every 10 ms. Mar 13 2007 09:45PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard Probe Array - UDIV yes 14 probes are operational ('ramped' geometry). n,Te, particle flux reported every 10 ms.Two high-gain channels are installed and operational for ECDC plasma diagnosis. Mar 13 2007 12:46PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes The 60, 110, 88LSB, 88USB and 88 are connected but still being tested. The Swept frequency channel is running DC voltages from 5V-7V, also in the testing stage. Jun 01 2007 09:11AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Perpendicular Mach probe head is installed. The drive is operational. Mar 15 2007 09:09PM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Perpendicular Mach probe head is installed. The probe drive is now operational. Mar 13 2007 09:51PM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP yes A-port WASP successfully collected data on 04/04. Some intermittent open circuit on SE Electrode. K-WASP took data on 04/11. Both ready to scan as needed. Apr 12 2007 04:18PM (nsmick) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick TCI yes NL_04 at 71.04 cm from 3/9/07 calibration May 23 2007 07:38AM (irby) Jim Irby Two-Color Interferometer irby,murray TS - Core yes 2 lasers, 11 spatial channels. Density is calibrated based on ECE cutoffs obtained on 4 May 2007. Additional spatial channels will be added over the next several weeks. May 10 2007 10:37AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes TS - Edge yes 2 lasers, 20 spatial channels. Fiber holder position is -125mm (standard). Density is cross-calibrated to the core system, based on shots 1070504014, 016, and 019. May 21 2007 02:39PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes Vispec yes 350 and 670 nm, 4 spatial channels May 04 2007 01:02PM (agraf) Alex Graf Visible Spectrometer agraf

Jun 8 2007 03:03:44:190PM

System Available Comment Availability Changed Owner Description Who Can Change Active MHD yes Fully operational Mar 28 2007 09:19PM (sears) Joe Snipes Active MHD Antenna sears,snipes BES yes vertical array of six views at R ~ 87.3 cm, radial array of three views out to R ~ 89 cm, both at outboard midplane. Three discrete fiber views of beam at R ~ 70.0, 76.5 and 82.5 cm. Feb 06 2007 10:00AM (bravenec) Ron Bravenec Beam Emission Spectroscopy bravenec Bolometers yes 2Pi diode operational, 2Pi foil being upgrade for noise resistance. Midplane foils calibrated for senstivity, still need better time constants. Midplane and divertor AXUV being digitized, processing calibration data. May 29 2007 11:22AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization yes First Boronization 5/9/07 May 10 2007 04:55PM (irby) Jim Irby Boronization dekow,irby CNPA no   Jan 14 2007 02:06PM  Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor yes The cryopump is operational in a manual mode. We will be working on interfacing its control system with the C-Mod state machine for semi-automatic operation. May 30 2007 07:58PM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard CXRS yes The pedestal toroidal array was installed, spatially and absolutely calibrated. There are 10 chords intersect the beam at the major_R_range=[75,4:87.4]cm. Spatial resolution: 1.2 cm. The F-top poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[67.8:91.0]cm. Spatial resolution: 1.22 cm. May 01 2007 12:31PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,rachmcd,rowan D Alpha yes \ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are available Mar 11 2007 10:28PM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe Dalsa yes camera is re-installed, and view has been calibrated Feb 26 2007 03:28PM (marmar) Earl Marmar Visible Bremsstrahlung marmar Disruption Mitigation no   Jan 14 2007 02:02PM  Bob 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,ldorf,terry DNB yes All systems are operational, but as of 28 March 2007, the beam needs additional conditioning for full performance shots Mar 28 2007 09:36AM (beals) Bob Granetz Diagnostic Beam beals,granetz FRC-ECE yes All channels now working. Apr 04 2007 11:04AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips G-Side Ratiomatic yes The gauge is operational. Mar 30 2007 10:54AM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland GPC yes Chs 1-8 operational. May 24 2007 08:40AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPC2 yes Most channels (except 1,5,8,10,17) operational. Jun 08 2007 08:29AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPI yes New view just outside of the lower X-point is operational, but data is being archived locally , not to the tree. Midplane GPI is not operational. Mar 27 2007 01:59PM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes spectral calibration needs to be checked, but system should be ready for the run Feb 26 2007 03:28PM (marmar) Earl Marmar H/D Ratio marmar Hirex Jr yes   Mar 06 2007 08:59AM (rice) John Rice High Resolution X-Ray ince,rice Hirex Sr yes Storing Data, but profiles not yet available Apr 27 2007 01:20PM (ince) John Rice High Resolution X-Ray ince,rice HXR yes Something might be wrong with channel 26; all others working fine. Mar 23 2007 10:43AM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt ICRF D-Antenna yes 80.5 MHz. ready Mar 28 2007 08:50AM (ylin) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna no 80 MHz. FFT installation/coaxial line needs more work Mar 16 2007 09:32AM (ylin) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes 78 MHz Apr 04 2007 08:56AM (ylin) Steve Wukitch J-port antenna wukitch,ylin Lower Hybrid no 6B Pressure window failed. Arcing in 6B, 8B,9B & 23B. May 04 2007 03:44PM (dterry) Ron Parker Lower Hybrid dterry,parker LPI yes   Apr 26 2007 08:35PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha yes Midplane data being digitized, processing calibration data. Divertor views showing significant noise, and not available. Upper view being debugged. May 29 2007 11:23AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke McPherson yes Working normally. Apr 19 2007 09:52AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry Michelson yes Operational. Mar 28 2007 08:33AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes E-Top, E-Bottom, F-top (cryo), G-side, and B-bottom are operational. F-top gauge has a 'sniffer tube' to measure pressures in cryopump gas box. Mar 20 2007 06:42PM (g) Brian LaBombard Baratron pressure gauges labombard MLP no Initial tests on the A-port scanning probe went well. We need to take care of some control glitches that caused some component failures. May 30 2007 08:01PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard MSE no (1) Bandpass filters replacement underway (2) Beam-into-gas spectrum measurement underway (3) Shutter mechanism currently unstable; remains open. (4) Expect beam-into-gas calibrations complete about 4/24. Apr 03 2007 12:05PM (sscott) Steve Scott Motional Stark Effect jinseok,sscott Neutrons yes Both neutron systems are fully operational Apr 05 2007 11:19AM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes operational Mar 21 2007 04:29PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby NINJA yes All capillaries displayed by the NINJA_CONTROL GUI have been tested. NINJA puffed on 1070329009 (A-B limiter). Mar 29 2007 11:47AM (terry) Brian LaBombard NINJA gas puff labombard,terry PCI yes The system is to be optimized. May 30 2007 01:12PM (lianglin) Miklos Porkolab Phase Contrast Imaging edlund,lianglin,ntsujii,porkolab Penning Gauges yes 8 in-situ Penning ionization gauges appear to be operational: CB_DivU, CB_OutL, CB_DivL, KA_OutU, KA_OutL, B_DivL, Cryo_1, Cryo_2. Cryo_1 and Cryo_2 are new and installed in the upper cryopump 'gas-box'. Mar 13 2007 10:01PM (labombard) Brian LaBombard Penning Ionization Gauges labombard Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV (without an ND filter) are operational. Mar 27 2007 01:53PM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe Polarimeter no Retro shutter closed Mar 15 2007 11:00AM (irby) Jim Irby C-Mod Polarimeter irby Probe Array - ISD yes Probes at 15 of the 16 poloidal locations ('ramped' geometry) are operational. n,Te, particle flux reported every 10 ms. Mar 13 2007 09:47PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH yes All 6 probes on the lower hybrid launcher (tungsten, 1.5 mm projection) are operational. Mar 13 2007 09:46PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes Probes at 10 poloidal locations (one 'ramped' and one 'flush') are operational. n,Te, particle flux reported every 10 ms. Mar 13 2007 09:45PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard Probe Array - UDIV yes 14 probes are operational ('ramped' geometry). n,Te, particle flux reported every 10 ms.Two high-gain channels are installed and operational for ECDC plasma diagnosis. Mar 13 2007 12:46PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes The 60, 110, 88LSB, 88USB and 88 are connected but still being tested. The Swept frequency channel is running DC voltages from 5V-7V, also in the testing stage. Jun 01 2007 09:11AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Perpendicular Mach probe head is installed. The drive is operational. Mar 15 2007 09:09PM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Perpendicular Mach probe head is installed. The probe drive is now operational. Mar 13 2007 09:51PM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP yes A-port WASP successfully collected data on 04/04. Some intermittent open circuit on SE Electrode. K-WASP took data on 04/11. Both ready to scan as needed. Apr 12 2007 04:18PM (nsmick) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick TCI yes NL_04 at 71.04 cm from 3/9/07 calibration May 23 2007 07:38AM (irby) Jim Irby Two-Color Interferometer irby,murray TS - Core yes 2 lasers, 11 spatial channels. Density is calibrated based on ECE cutoffs obtained on 4 May 2007. Additional spatial channels will be added over the next several weeks. May 10 2007 10:37AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes TS - Edge yes 2 lasers, 20 spatial channels. Fiber holder position is -125mm (standard). Density is cross-calibrated to the core system, based on shots 1070504014, 016, and 019. May 21 2007 02:39PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes Vispec yes 350 and 670 nm, 4 spatial channels May 04 2007 01:02PM (agraf) Alex Graf Visible Spectrometer agraf