Miniproposals

Miniproposal: 472 Date Filed: 3/8/2007 Title: Continued Studies of Turbulence in Low Density Ohmic Plasmas First Author: Liang Lin Session Leader: Liang Lin (shots 1-35)

Engineering Operator Run Comment

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Session Leader Plans

Entered: Jul 12 2007 12:19:37:053PM

Author: Liang Lin

Background: We want to carry out further studies of turbulence in low density ohmic plasma after 1050819. We will use the PCI medium-k configuration with increased wave-number resolution to study kR structure of the turbulence as the density is varied. Moreover, we will use the localizing setup to determine the dominant direction of propagation (electron vs. ion diamagnetic) of the density fluctuations. Approach: This run consists of two parts. For the first part, reproduce 1050819028, which has B = 5.2 T and Ip = 0.8 MA. Scan nebar from 1.6 x 10^20 to 0.4 x 10^20 m-3 (~10 good shots). For the second part, change the B to 2.6 and Ip to 0.4 MA, rescan nebar. Very clear and steady discharges are expected. TCI, ECE, GPC, TS, and other standard diagnostics for ne and Te are required. The PCI will be primary diagnostic to monitor the turbulence, but reflectometer is desired. Plan: For the B = 5.2 T and Ip = 0.8 MA discharges, start with shot 1070627008 and try to duplicate 1050819028. For the B = 2.6 T and Ip = 0.4 MA discharges, start with 1070710019 and lower the current.

Physics Operators Plans

Entered: Jul 13 2007 06:16:43:360AM

Author: Bill Rowan

Engineering Setup for Friday, 13 July 2007; Run 1070713 MP#: 472 "Continued Studies of Turbulence in Low Density Ohmic Plasmas" SL: Liang Lin PO: Bill Rowan Engineering Setup ------------------ Overnight ECDC in deuterium Bake at 60 C. Run begins at 09:00 and ends at 17:00 Power systems as on 1070627008 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) pump out NINJA and then disable. Enable the following gate valves and shutters, assuming no vacuum problems: ECE, VUV, DNB, Z-bolo shutters Torvac setup: Gate valves open after the shot ICRF Setup: No ICRF for this run LH Setup: No LH for this run DNB: yes Cryopump: No cryopump for this run ------------ PO plan. First part of the run. Use shot 1070627008 as a starting point and modify it to provide BT (5.2T) and ne_l04 similar to 1050819028 Second part of the run BT will be reduced to 2.6T later in the run. Use a shot from early in the run 1070710. When this reduction is made, the SL has asked that qa be about the same as for the first part of the run

Session Leader Summaries

Entered: Jul 13 2007 05:27:27:497PM

Author: Liang Lin

Results: We got the discharges we desired. Two density scans at B = 5.2 T and 2.6 T have been performed. For B = 5.2 T and Ip = 0.8 MA, the line integrated density was scanned from 1.0 down to 0.2 10^20/m^2, which covered both "linear" and "saturated" ohmic regimes. For B = 2.6 T and Ip = 0.4 MA, the line integrated density was scanned from 0.74 to 0.16 10^20/m^2. We had some difficulties to lower the density at such low field and current. Thus, most shots were in the "saturated" ohmic regime, but one shot was in the "linear" ohmic regime. The PCI diagnostic, the major turbulence monitoring diagnostic, worked very well today. The collected turbulence data will be analyzed and compared with the gyrokinetic modeling. The following is a list for the further analysis: B = 5.2 T and Ip = 0.8 MA Shot nev ~tau_kin 1070713001 1.44 32 1070713002 1.55 34 1070713003 1.53 33 1070713004 1.35 34 1070713005 1.18 35 1070713007 1.16 35 1070713008 1.07 38 1070713009 0.92 40 1070713010 0.72 40 1070713011 0.61 36 1070713012 0.48 29 1070713013 0.41 27 1070713014 0.37 25 1070713015 0.34 24 1070713016 0.30 23 1070713017 0.28 23 1070713018 0.26 22 1070713019 0.52 32 1070713020 0.81 39 1070713021 1.09 35 B = 2.6 T and Ip = 0.4 MA Shot nev ~tau_kin 1070713024 1.15 20 1070713025 1.02 21 1070713027 0.98 20 1070713028 1.02 25 1070713029 0.88 24 1070713030 0.67 26 1070713031 0.60 24 1070713032 0.49 26 1070713033 0.40 27 1070713034 0.30 26 1070713035 0.19 15 In general, it is a good running day. Thank you all.

Physics Operator Summaries

Entered: Jul 13 2007 08:00:51:220PM

Author: Bill Rowan

The discharges for this experiment consisted of a scan of density at each of two magnetic fields with q held constant throughout. The SL proposed a discharge from 2005 (1050819028) as a model for the run. The PO (with a little help from his friends) matched this shot to two more recent discharges (1070627008 and 1070628022) to streamline shot setup. Only small changes were required to match these discharges to the target from 2005. A density scan at 5.2 T and 0.8 MA covered the Alcator linear and saturated confinement regimes as demonstrated by the SL. The shots were based on segment 1 from 1070710020 and segment 2 from 1070627008. The shots in the density scan are 1070713001-021. A second density scan at 2.6T and 0.4 MA is comprised of shots 1070713022-035. The shots were based on segment 1 of 1070710020 and segment 2 from 1070628022 (the fabulously successful Ohmic ITB run). There were disruptions on two shots 1070713006 and 1070713023. Matt associated the first with an impurity injection. The second was macroscopically similar to the first and is attributed to impurity injection as well. Scorecard 35 Plasmas 0 Duds 0 Fizzles 35 total

Session Leader Comments
Jul 13 2007 09:15:57:263AM	1070713001	Liang Lin	Plasma Bt = 5.2 T, Ip = 0.8 MA q95 = 4.46197 wkin = 0.0356046 MJ wmhd = 0.0354046 MJ tau_kin = 0.0329980 sec tau_mhd = 0.0328268 sec tau_89 = 0.0397933 sec tau_98 = 0.0701390 sec Similar to 1050819028.
Jul 13 2007 09:41:38:070AM	1070713002	Liang Lin	nev = 1.55148 10^20/m^3 q95 = 4.39529 wkin = 0.0373421 MJ wmhd = 0.0350185 MJ tau_kin = 0.0340791 sec tau_mhd = 0.0319571 sec tau_89 = 0.0397188 sec tau_98 = 0.0706717 sec Next shot will be a repeat.
Jul 13 2007 09:52:58:080AM	1070713003	Liang Lin	nev = 1.52723 10^20/m^3 q95 = 4.41541 wkin = 0.0362263 MJ wmhd = 0.0341921 MJ tau_kin = 0.0331679 sec tau_mhd = 0.0313011 sec tau_89 = 0.0397246 sec tau_98 = 0.0699307 sec Next shot, lower nel_04 to 0.9 x 10^20/m^2
Jul 13 2007 11:49:45:877AM	1070713005	Liang Lin	nev = 1.18336 10^20/m^3 q95 = 4.39587 wkin = 0.0220877 MJ wmhd = 0.0108898 MJ tau_kin = 0.0347225 sec tau_mhd = 0.0390832 sec tau_89 = 0.0414041 sec tau_98 = 0.0709420 sec Next shot, nel_04 ~ 0.77 x 10^20/m^2.
Jul 13 2007 10:31:43:610AM	1070713006	Liang Lin	Plasma disrupted. Next shot, another try, nel_04 ~ 0.77 x 10^20/m^2.
Jul 13 2007 10:37:14:037AM	1070713007	Liang Lin	nev = 1.16196 10^20/m^3 q95 = 4.35902 wkin = 0.0338929 MJ wmhd = 0.0360040 MJ tau_kin = 0.0351280 sec tau_mhd = 0.0373123 sec tau_89 = 0.0419848 sec tau_98 = 0.0724240 sec Next shot, lower nel_04 to 0.7 x 10^20/m^2.
Jul 13 2007 10:53:21:140AM	1070713008	Liang Lin	nev = 1.07515 10^20/m^3 wkin = 0.0348113 MJ wmhd = 0.0352229 MJ tau_kin = 0.0380057 sec tau_mhd = 0.0384530 sec tau_89 = 0.0430651 sec tau_98 = 0.0743281 sec Next shot, lower nel_04 to 0.6 x 10^20/m^2.
Jul 13 2007 11:04:41:263AM	1070713009	Liang Lin	nev = 0.917010 10^20/m^3 q95 = 4.34285 wkin = 0.0340694 MJ wmhd = 0.0360793 MJ tau_kin = 0.0403221 sec tau_mhd = 0.0427053 sec tau_89 = 0.0445910 sec tau_98 = 0.0759105 sec Next shot, lower nel_04 to 0.5 x 10^20/m^2.
Jul 13 2007 11:14:26:087AM	1070713010	Liang Lin	nev = 0.723401 10^20/m^3 q95 = 4.35163 wkin = 0.0312778 MJ wmhd = 0.0348845 MJ tau_kin = 0.0396926 sec tau_mhd = 0.0442636 sec tau_89 = 0.0454312 sec tau_98 = 0.0742690 sec Next shot, lower nel_04 to 0.4 x 10^20/m^2.
Jul 13 2007 11:28:38:963AM	1070713011	Liang Lin	nev = 0.612876 10^20/m^3 wkin = 0.0281598 MJ wmhd = 0.0319426 MJ tau_kin = 0.0364472 sec tau_mhd = 0.0413351 sec tau_89 = 0.0449274 sec tau_98 = 0.0694222 sec Next shot, lower nel_04 to 0.35 x 10^20/m^2.
Jul 13 2007 11:41:54:847AM	1070713012	Liang Lin	Good Plasma. nev = 0.476536 10^20/m^3 q95 = 4.34046 wkin = 0.0231526 MJ wmhd = 0.0285748 MJ tau_kin = 0.0292260 sec tau_mhd = 0.0360759 sec tau_89 = 0.0428585 sec tau_98 = 0.0593873 sec Next shot, lower nel_04 to 0.30 x 10^20/m^2.
Jul 13 2007 12:05:47:557PM	1070713013	Liang Lin	Good plasma. nev = 0.409056 10^20/m^3 q95 = 4.31273 tau_kin = 0.0267641 sec tau_mhd = 0.0357337 sec tau_89 = 0.0420761 sec tau_98 = 0.0574165 sec Next shot, lower nel_04 to 0.25 x 10^20/m^2.
Jul 13 2007 12:06:15:137PM	1070713014	Liang Lin	nev = 0.373384 10^20/m^3 q95 = 4.33054 wkin = 0.0207677 MJ wmhd = 0.0262230 MJ tau_kin = 0.0245752 sec tau_mhd = 0.0310332 sec tau_89 = 0.0405496 sec tau_98 = 0.0521102 sec Next shot, lower nel_04 to 0.2 x 10^20/m^2.
Jul 13 2007 12:17:49:243PM	1070713015	Liang Lin	nev = 0.344388 10^20/m^3 q95 = 4.29949 wkin = 0.0199344 MJ wmhd = 0.0252832 MJ tau_kin = 0.0237380 sec tau_mhd = 0.0301138 sec tau_89 = 0.0402871 sec tau_98 = 0.0504125 sec Next shot, lower nel_04 to 0.15 x 10^20/m^2.
Jul 13 2007 12:36:35:687PM	1070713016	Liang Lin	nev = 0.300446 10^20/m^3 q95 = 4.31214 wkin = 0.0194118 MJ wmhd = 0.0244242 MJ tau_kin = 0.0234368 sec tau_mhd = 0.0294903 sec tau_89 = 0.0402852 sec tau_98 = 0.0493071 sec One more shot for lowering nel_04. There will be a cell access for MSE after this shot.
Jul 13 2007 01:02:59:677PM	1070713017	Liang Lin	nev = 0.285238 10^20/m^3 q95 = 4.26582 wkin = 0.0184133 MJ wmhd = 0.0225599 MJ tau_kin = 0.0226492 sec tau_mhd = 0.0277720 sec tau_89 = 0.0402517 sec tau_98 = 0.0477791 sec nel_04 ~ 0.2 x 10^20/m^2, the lowest density we can reach. For the next few shot, keep the same magnetic field Bt = 5.2T and current Ip= 0.8, scan nel_04 backward to cover 0.2, 0.4, 0.6, 0.8 10^20/m^3. Then, we move to the second segment of today's run.
Jul 13 2007 01:26:55:247PM	1070713018	Liang Lin	nev = 0.256393 10^20/m^3 q95 = 4.28410 tau_kin = 0.0215666 sec tau_mhd = 0.0330764 sec tau_89 = 0.0422031 sec tau_98 = 0.0488118 sec Next shot, increase nel_04 to 0.4 x 10^20/m^2.
Jul 13 2007 01:38:14:573PM	1070713019	Liang Lin	nev = 0.524447 10^20/m^3 q95 = 4.35091 wkin = 0.0249432 MJ wmhd = 0.0303909 MJ tau_kin = 0.0318719 sec tau_mhd = 0.0388295 sec tau_89 = 0.0439837 sec tau_98 = 0.0643383 sec Next shot, increase nel_04 to 0.6 x 10^20/m^2.
Jul 13 2007 01:49:34:697PM	1070713020	Liang Lin	nev = 0.809911 10^20/m^3 q95 = 4.31767 tau_kin = 0.0388882 sec tau_mhd = 0.0429519 sec tau_89 = 0.0448530 sec tau_98 = 0.0744974 sec Next shot, increase nel_04 to 0.8 x 10^20/m^2.
Jul 13 2007 02:05:41:027PM	1070713021	Liang Lin	nev = 1.08610 10^20/m^3 q95 = 4.33230 wkin = 0.0331196 MJ wmhd = 0.0339452 MJ tau_kin = 0.0348959 sec tau_mhd = 0.0357761 sec tau_89 = 0.0420835 sec tau_98 = 0.0718326 sec Next shot, move to the second segment of today's run, Bt = 2.6 T and Ip = 0.4 MA. The target nel_04 to 1.0 x 10^20/m^2.
Jul 13 2007 02:29:56:357PM	1070713022	Liang Lin	Next shot. Reduce minimum BT to 2.6 T, increase nel_04 to 1.0 x 10^20/m^2.
Jul 13 2007 02:33:45:157PM	1070713023	Liang Lin	Plasma disrupted. Next shot, lower nel_04.
Jul 13 2007 02:46:44:190PM	1070713024	Liang Lin	Good plasma. nev = 1.15299 10^20/m^3 q95 = 4.32192 wkin = 0.0124134 MJ wmhd = 0.0107611 MJ tau_kin = 0.0200137 sec tau_mhd = 0.0173549 sec tau_89 = 0.0239674 sec tau_98 = 0.0418664 sec Next shot, lower nel_04 to 0.7 x 10^20/m^2.
Jul 13 2007 03:00:47:517PM	1070713025	Liang Lin	Good plasma. nev = 1.01754 10^20/m^3 q95 = 4.35878 wkin = 0.0123934 MJ wmhd = 0.0108228 M tau_kin = 0.0212143 sec tau_mhd = 0.0185145 sec tau_89 = 0.0245216 sec tau_98 = 0.0409253 sec Next shot,continue lowering nel_04.
Jul 13 2007 03:13:30:223PM	1070713026	Liang Lin	Plasma disrupted. Next shot, repeat.
Jul 13 2007 03:24:58:960PM	1070713027	Liang Lin	Good plasma. nev = 0.979153 10^20/m^3 q95 = 4.20443 wkin = 0.0120954 MJ wmhd = 0.0107227 MJ tau_kin = 0.0203017 sec tau_mhd = 0.0180152 sec tau_89 = 0.0241131 sec tau_98 = 0.0412475 sec Next shot,continue lowering nel_04 to 0.55 x 10^20/m^2.
Jul 13 2007 03:40:59:287PM	1070713028	Liang Lin	nev = 1.01700 10^20/m^3 q95 = 4.24732 wkin = 0.0134374 MJ wmhd = 0.0108374 MJ tau_kin = 0.0251293 sec tau_mhd = 0.0202734 sec tau_89 = 0.0256543 sec tau_98 = 0.0446714 sec
Jul 13 2007 03:49:43:470PM	1070713029	Liang Lin	nev = 0.883175 10^20/m^3 q95 = 4.21741 wkin = 0.0124902 MJ wmhd = 0.0106996 MJ tau_kin = 0.0239207 sec tau_mhd = 0.0204999 sec tau_89 = 0.0258251 sec tau_98 = 0.0438177 sec Next shot, target nel_04 to 0.45 x 10^20/m^2.
Jul 13 2007 04:00:13:107PM	1070713030	Liang Lin	Good plasma. nev = 0.666586 10^20/m^3 q95 = 4.23288 wkin = 0.0119968 MJ wmhd = 0.0106671 MJ tau_kin = 0.0256341 sec tau_mhd = 0.0227912 sec tau_89 = 0.0268535 sec tau_98 = 0.0424735 sec Next shot, target nel_04 to 0.35 x 10^20/m^2.
Jul 13 2007 04:15:29:250PM	1070713031	Liang Lin	nev = 0.598971 10^20/m^3 q95 = 4.20598 wkin = 0.0111057 MJ wmhd = 0.0105941 MJ tau_kin = 0.0241421 sec tau_mhd = 0.0230368 sec tau_89 = 0.0271601 sec tau_98 = 0.0432814 sec Next shot, lower nel_04 to 0.30 x 10^20/m^2.
Jul 13 2007 04:26:34:077PM	1070713032	Liang Lin	nev = 0.489493 10^20/m^3 q95 = 4.23678 wkin = 0.0109553 MJ wmhd = 0.0102361 MJ tau_kin = 0.0264494 sec tau_mhd = 0.0247110 sec tau_89 = 0.0283211 sec tau_98 = 0.0437391 sec Next shot, lower nel_04 to 0.20 x 10^20/m^2.
Jul 13 2007 04:41:18:640PM	1070713033	Liang Lin	nev = 0.398268 10^20/m^3 q95 = 4.21869 wkin = 0.0102892 MJ wmhd = 0.00963413 MJ tau_kin = 0.0271770 sec tau_mhd = 0.0254489 sec tau_89 = 0.0291537 sec tau_98 = 0.0432417 sec Continue lowering nel_04.
Jul 13 2007 04:54:48:187PM	1070713034	Liang Lin	nev = 0.300990 10^20/m^3 q95 = 4.19516 wkin = 0.00935039 MJ wmhd = 0.00868848 MJ tau_kin = 0.0262672 sec tau_mhd = 0.0244106 sec tau_89 = 0.0298009 sec tau_98 = 0.0418361 sec Next shot, the last shot of today. Thank you all.
Jul 13 2007 05:10:02:330PM	1070713035	Liang Lin	nev = 0.188873 10^20/m^3 q95 = 4.16324 wkin = 0.00551148 MJ wmhd = 0.00598041 MJ tau_kin = 0.0148781 sec tau_mhd = 0.0161593 sec tau_89 = 0.0270429 sec tau_98 = 0.0306630 sec

Physics Operator Comments
Jul 13 2007 09:11:27:290AM		Bill Rowan	Load from 1070627008 There are three differences between the two discharges. TF on 1070627008 is 5.4 T. Reduce to 5.2 T 150000*5.2/5.4 = 144444 nl_04 on 1070627008 is 0.64e+20. increase to 1.0e+20 gaps also differ Load programming into live shot model Segment 1. There were no segment 1 changes yesterday. (run 1070712). Use segment 1 from 1070712018 Load programming into live shot model
Jul 13 2007 09:26:41:950AM		Bill Rowan	001. Plasma cell entry after this shot for TCI. TCI worked on this shot but Rick wants to optimize. Next shot. Changed the startup to 1070710020. Steve corrected my startup choice. The one that I chose was for a special setup used for the current ramp during the last two days. This new choice of setup is from a late shot on Tuesday.
Jul 13 2007 09:11:05:713AM	1070713001	Bill Rowan	001. Plasma cell entry after this shot for TCI. TCI worked on this shot but Rick wants to optimize.
Jul 13 2007 09:38:43:147AM	1070713002	Bill Rowan	002. Plasma TCI feedback continues to work SL finds the discharge satisfactory. Next shot. Ninja puffing at 1.4s. Requested by JT. SL agreed.
Jul 13 2007 09:52:18:487AM	1070713003	Bill Rowan	003. Plasma Next shot. Lower the line averaged density by 10% ne_l04 reduced from 1.0e+20 to 0.9e+20
Jul 13 2007 09:58:26:480AM	1070713004	Bill Rowan	004. Plasma ne_l04 = 0.9e+20
Jul 13 2007 10:02:31:233AM	1070713004	Bill Rowan	Next shot. ne_l04 reduced to 0.8e+20
Jul 13 2007 10:10:35:383AM	1070713005	Bill Rowan	005. Plasma ne_l04 = 0.83e+20
Jul 13 2007 10:15:06:717AM	1070713005	Bill Rowan	Next shot. ne_l04 set to 7.7e+19
Jul 13 2007 10:30:18:047AM	1070713006	Bill Rowan	006. Plasma. Disruption at 0.25 s. Matt says that there was an iron injection. Next shot. Try again.
Jul 13 2007 10:37:26:647AM	1070713007	Bill Rowan	007. Plasma ne_l04 close to 8.0e+19 Next shot. ne_l04 demand to 6.7e+19 with then intent of generating 7.0e+19
Jul 13 2007 10:53:46:140AM	1070713008	Bill Rowan	008. Plasma ne_l04 a bit above 7.0e+19 Next shot. ne_l04 demand to 5.5e+19 with the intent of generating 6.0e+19
Jul 13 2007 11:05:29:263AM	1070713009	Bill Rowan	009. Plasma ne_l04 a bit above 6.0e+19 Next shot. Lower ne again. ne_l04 demand to 5.0e+19 with the intent of generating 5.5e+19
Jul 13 2007 11:15:51:230AM	1070713010	Bill Rowan	010. Plasma ne_l04 approx 5.3e_19 Next shot. Lower ne again ne_l04 demand to 3.7e+19. Target is 4.0e+19
Jul 13 2007 11:26:48:087AM	1070713011	Bill Rowan	011. Plasma ne_l04 approx 4.0e+19 Next shot. ne_l04 demand to 3.2e+19. Target is 3.5e+19
Jul 13 2007 11:43:12:650AM	1070713012	Bill Rowan	012. Plasma ne_l04 approx 3.5 e+19 Next shot ne_l04 demand to 2.7e+19. Target is 3.0e+19
Jul 13 2007 11:54:14:313AM	1070713013	Bill Rowan	013. Plasma ne_l04 approx 2.8e+19. Next shot. ne_l04 demand to 2.4e+19. Target is 2.5e+19
Jul 13 2007 12:06:03:417PM	1070713014	Bill Rowan	014. Plasma ne_l04 approx 2.5 e+19 Next shot. ne_l04 demand 1.9e+19. Target is 2.0e+19.
Jul 13 2007 12:19:19:010PM	1070713015	Bill Rowan	015. Plasma ne_l04 approx 2.1e+19 Next shot ne_l04 demand to 1.4e+19. Target is 1.5e+19
Jul 13 2007 12:33:53:590PM	1070713016	Bill Rowan	016. Plasma ne_l04 approx 2e+19. No change Next shot. ne_l04 demand to 1.0e+19 for one shot just to see whether it will come down further
Jul 13 2007 01:00:26:080PM	1070713017	Bill Rowan	017. Plasma ne_l04 apprix 2e+19 Cell access to alllow mse to setup a test. Next shot. repeat this shot
Jul 13 2007 01:38:32:573PM	1070713019	Bill Rowan	019. Plasma ne_l04 = 3.75e+19 Next shot Reload shot 009 to return to ne_l04=6.0e+19
Jul 13 2007 02:23:34:800PM	1070713022	Bill Rowan	022. Plasma BT minimum is 3.1 T. Next shot. Reduce minimum BT to 2.6 T Increased nl_04 to 1.0e+20: copied wire 14 from segment 2 of shot 003
Jul 13 2007 02:39:01:117PM	1070713023	Bill Rowan	023. Plasma. disruption at 1.0 s Density increased beyond the greenwald limit Next shot. Return to the density programing used for shot 022
Jul 13 2007 02:44:07:140PM	1070713024	Bill Rowan	024. Plasma nl_04 = 0.74e+19
Jul 13 2007 02:47:02:500PM	1070713024	Bill Rowan	024. Plasma nl_04 = 7.4e+19 Next shot nl_04 demand set to 6.5e+19. Intent is to generate 7.0e+19
Jul 13 2007 03:00:11:500PM	1070713025	Bill Rowan	025. Plasma nl_04=6.7e+19 Next shot nl_04 demand set to 6.1e+19.
Jul 13 2007 03:12:54:350PM	1070713026	Bill Rowan	026. Plasma. Disruption at 0.5 s Next shot. No DPCS changes
Jul 13 2007 03:24:53:380PM	1070713027	Bill Rowan	027. Plasma. nl_04 = 6.1e+19 Next shot. nl_04 demand set to 5.5e+19
Jul 13 2007 03:37:51:893PM	1070713028	Bill Rowan	028. Plasma nl_04=6.0e+19 Next shot nl_04 = 5.0e+19
Jul 13 2007 03:50:07:923PM	1070713029	Bill Rowan	029. Plasma nl_04 approx 5.5e+19 Next shot nl_04 demand set to 4.0e+19
Jul 13 2007 04:04:54:973PM	1070713030	Bill Rowan	030. Plasma nl_04=4.5e+19 Next shot nl_04 demand set to 3.5e+19
Jul 13 2007 04:15:53:563PM	1070713031	Bill Rowan	031. Plasma nl_04 = 4.1e+19 Next shot nl_04 demand set to 3.0e+19
Jul 13 2007 04:34:59:053PM	1070713032	Bill Rowan	032. Plasma nl_04 = 3.5e+19 Next shot. nl_o4 demand set to 2.5e+19 delayed ramp down on TF to 2.1 s Oh and TF invert times changed: see engr log entries Fizzle detector off gate changed: see engr log entries
Jul 13 2007 04:43:35:940PM	1070713033	Bill Rowan	033. Plasma nl_04=3.0e+19 after this shot Message from mdsplus@cmodws32.psfc.mit.edu *** OH resistance > 2.5 uohm for shot 1070713033 --- stop run and evaluate*** : 2.59213 uohm Next shot nl_04 demand set to 1.5e+19
Jul 13 2007 04:55:40:453PM	1070713034	Bill Rowan	034. Plasma nl_04=2.1e+19 Next shot. nl_04 demand set to 1.0e+19

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:06:03:863AM	Plasma	Ok
2	09:28:13:283AM	Plasma	Ok
3	09:41:05:227AM	Plasma	Ok
4	09:53:43:630AM	Plasma	Ok
5	10:06:51:333AM	Plasma	Ok
6	10:19:12:533AM	Plasma	Ok
7	10:31:53:017AM	Plasma	Ok
8	10:44:43:510AM	Plasma	Ok
9	10:57:21:287AM	Plasma	Ok
10	11:09:51:067AM	Plasma	Ok
11	11:22:24:237AM	Plasma	Ok
12	11:36:41:033AM	Plasma	Ok
13	11:49:09:440AM	Plasma	Ok
14	12:01:41:973PM	Plasma	Ok
15	12:14:11:817PM	Plasma	Ok
16	12:28:54:427PM	Plasma	Ok
17	12:41:44:397PM	Plasma	Ok
18	01:20:03:253PM	Plasma	Ok
19	01:32:38:597PM	Plasma	Ok
20	01:45:22:330PM	Plasma	Ok
21	01:57:45:580PM	Plasma	Ok
22	02:13:21:027PM	Plasma	Ok
23	02:28:09:557PM	Plasma	Ok
24	02:40:54:540PM	Plasma	Ok
25	02:53:40:150PM	Plasma	Ok
26	03:06:01:707PM	Plasma	Ok
27	03:18:47:580PM	Plasma	Ok
28	03:31:21:747PM	Plasma	Ok
29	03:43:49:713PM	Plasma	Ok
30	03:56:30:213PM	Plasma	Ok
31	04:08:56:617PM	Plasma	Ok
32	04:21:35:633PM	Plasma	Ok
33	04:37:26:917PM	Plasma	Ok
34	04:49:59:960PM	Plasma	Ok
35	05:02:38:400PM	Plasma	Ok

System Availability

Jul 13 2007 09:05:39:033AM

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. Jun 20 2007 05:35PM (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 no Only high frequency channels now working (17 to 32). Ch 22 has bad video amp. LO is OK. Problem looks to be in mixer amp unit. Jul 11 2007 10:52AM (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. Max power is about 1.5 MW Jun 20 2007 09:23AM (ylin) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna yes 80 MHz. Maxc power is about 1.5 MW Jun 20 2007 09:23AM (ylin) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes 78 MHz. dipole configuration. Using #4 transmitter only. Max power about 1.5 MW instead of 3 MW. Jun 20 2007 09:22AM (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 Today (1070713) is the first day with the new waveguides. 50, 60, 75 88, 88l,88u, 110 and the variable frequency channel are operational but still in testing. Jul 13 2007 08:40AM (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, 10 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. Jul 11 2007 09:18AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes TS - Edge yes 2 lasers, 20 spatial channels. Fiber holder position is -124.5mm (standard). Density is calibrated according to Raman scattering results from 26 May, supplemented with ECE cutoffs obtained on shot 1070531015. Jun 14 2007 06:21PM (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