Miniproposals

Miniproposal: 491 Date Filed: 5/25/2007 Title: MSE Calibrations First Author: Steve Scott Session Leader: Steve Scott (shots 1-1) Session Leader: Steve Scott (shots 1-20)

Engineering Operator Run Comment

MSE beam-into-gas, no fields Steve Scott

Session Leader Plans

Entered: Jul 31 2007 10:09:04:420AM

Author: Steve Scott

MSE beam-into-gas, no fields Start times: DNB conditioning starts at noon. shots into torus starting 1PM Purpose: measure the Doppler shift with a spectrometer looking through the MSE optics on a series of beam-into-gas shots with no toroidal or poloidal fields. Observe whether the Doppler shift changes shot-to-shot or within a shot. Such changes would imply that the MSE optics change their viewing angle with respect to the beam and would potentially explain the poor reproducibility of MSE. Reference shot: 1070402013. Fill gas = helium (he4). Desired pressure about 3 mTorr as measured on MKS. My understanding (based on data 5/29/2007) is that the g-side ratiomatic reads about a factor of 2 less than the MKS. We should check whether the same ratio holds for today. Assuming that it does, then we would want a pressure of 1.0 - 1.5 mTorr as indicated on the ratiomatic. Run plan: 1. If the desired torus pressure is not achieved, we may take a couple of shots to adjust the pressure to the desired range. 2. 10-20 shots, DNB into torus, no fields. DNB modulated: 80ms on, 20 ms off. start 0.4 sec. total duration = 1.8 sec. end at about 2.2 sec. total 'on' time = 1.44 sec. Bill Rowan will be operating the spectrometer remotely. MSE channel 9 (near optical axis) will be used. 3. 10 shots, DNB un-modulated. start 0.4 sec, end 1.8 sec. More spectrum measurements. still MSE ch 9. 4. Swap MSE channel to channel #0 (edge channel). Take about 10 shots, with either a modulated or un-modulated DNB. Choice will depend on which one provides more photons as measured in steps #2 and #3. 5. (Much lower priority) 5-10 shots where we deliberately reduce te DNB current. purpose is to correlate the spectral intensity with DNB current.

Physics Operators Plans

Entered: Jul 31 2007 09:29:29:547AM

Author: Steve Wolfe

Physop plan and engineering setup for Tuesday, July 31,2007 Beam into gas (no fields) MP: MP#460 ? MSE testing SL: Scott PO: wolfe EO: Toland Gas setup: Use only B-top (PG4) gas feed. Load B-top with 6 psi of Helium. All other valves disabled. TORVAC valves open Eng Control panel Load from 1070402013 Note: All supplies OFF, fizzle detector should be set On=2.0, Off=2.1 Plan: Run repeated beam into gas shots to monitor possible changes in MSE optics.

Session Leader Summaries

Entered: Jul 31 2007 03:55:47:673PM

Author: Steve Scott

We had a successful day firing the dnb into the torus with no fields. DNB performance and performance of the gas system were both very reliable. shots 002 to 012 dnb = modulated (80 ms on, 20 ms off). fibers from MSE channel 9 into McPherson spectrometer. gas about 3.0 mTorr (peak), drooping to 1.8 at the end of the dnb, as measured by the g-side MKS. only bad shot was shot 10 -- dnb faulted. DNB current on shots 003 thru 009 very similar. current was a little lower on shot 002. the current waveform differed on shots 11 and 12 because Dexter tweaked the gas following the faults on shot 10. this is a good set to look for possible motion of MSE optics shots 013 thru 020 dnb = unmodulated. current not as high, typically 5. drooping to 4.0 gas still 2.8 mTorr max this is a good set to look for motion of MSE optics with an unmodulated beam. Jinseok also checked the temperature of the DNB drift tube during shots with a Raytek noncontact thermometer. He saw no changes larger than 1 degree Farenheit.

Physics Operator Summaries

Session Leader Comments
Jul 31 2007 12:58:33:367PM	1070731001	Steve Scott	First shot planned for about 1:00 PM. Starting with reference shot 1070402013. Expected torus pressure = 3 mTorr (g-side mks), = 1.5 mTorr (g-side-ratiomatic) MSE channel 9 being fed into the McPherson 1-meter monochrometer. DNB timing: 80 ms on, 20 ms off. Start 0.4 sec, end 2.2 sec. Result: 1) actual gas delivered looks very small or non-existant. 2) no DNB either.
Jul 31 2007 01:11:14:287PM	1070731002	Steve Scott	Rep rate for these shots will be about 6 minutes - limited by data acquisition. Result: good pressure: peak = 3.0 on MKS, about 1.3 on g-side ratiomatid good DNB. current = 6.0 amps, quickly dropping to about 5.2 no faults.
Jul 31 2007 01:22:40:817PM	1070731003	Steve Scott	good dnb. But it appears that we have a data hangup. investigating ... Two minutes later: data have arrived. peak pressure same as shot 2. ther is a little more pressure droop as time progresses, but OK overall. dnb current: peak = 6.0, but a little less droop. about 5.4 amps at the end.
Jul 31 2007 01:27:59:743PM	1070731004	Steve Scott	DNB: good. 6.2 amps, decreasing to 5.5 gas: good.
Jul 31 2007 01:37:30:457PM	1070731005	Steve Scott	dnb: good. 6.4 amps, drooping to 5.5 gas: good
Jul 31 2007 01:46:33:233PM	1070731006	Steve Scott	DNB: good. 6.4 --> 5.5 amps. gas: good
Jul 31 2007 01:58:12:280PM	1070731007	Steve Scott	DNB: good. 6.4 --> 5.5 amps gas: good
Jul 31 2007 02:04:52:210PM	1070731008	Steve Scott	DNB: good. 6.4 --> 5.6 amps gas: good
Jul 31 2007 02:16:03:080PM	1070731009	Steve Scott	DNB: good. about 5.6 amps gas: good.
Jul 31 2007 02:23:41:603PM	1070731010	Steve Scott	DNB: multiple faults. only 3 beam blips. this is not a member of the scan. gas: ok
Jul 31 2007 02:36:46:493PM	1070731011	Steve Scott	Dexter tweaked dnb gas in test cell. Hopefully this will eliminate the faults that we experienced on the previous shot. dnb current is lower than on previous shots, particularly at the beginning, where we got only about 4.5 amps. gas: good
Jul 31 2007 02:45:06:770PM	1070731012	Steve Scott	DNB: about the same as shot 11. 4.5 amps early, rising to 5.5 gas: good
Jul 31 2007 03:01:37:460PM	1070731013	Steve Scott	Starting this shot, we will go to an UNMODULATED dnb. timing = 0.4 --> 1.8 sec. still using MSE channel 9 into the spectrometer. result: unmodulated, 5.0 --> 4.0 ghas: ok.
Jul 31 2007 03:04:26:230PM	1070731014	Steve Scott	DNB: unmodulated. current a little lower than on shot 13. generally OK. gas: good
Jul 31 2007 03:14:22:990PM	1070731015	Steve Scott	DNB: current drooping some more, to about 4.0 amps for more than half the shot. but no faults. gas: good
Jul 31 2007 03:23:08:877PM	1070731016	Steve Scott	DNB: current history like previous shot. 1 late fault. gas: good
Jul 31 2007 03:32:25:083PM	1070731017	Steve Scott	DNB: current similar to shots 15, 16. no faults. gas: good
Jul 31 2007 03:41:20:077PM	1070731018	Steve Scott	DNB: a little more current than previous shots. good. gas: good
Jul 31 2007 03:52:21:580PM	1070731019	Steve Scott	DNB: good. like previous shot. gas: good. next shot will be the last.
Jul 31 2007 04:00:42:100PM	1070731020	Steve Scott	DNB: one fault, otherwise ok. current is higher. gas: good ------------------- END OF RUN -------------------------

Physics Operator Comments
Jul 31 2007 11:54:55:120AM		Steve Wolfe	Load from 1070402013 Change seg1 title to "beam into gas tests NO FIELDS" Zero wires 4 and 6 (not used); the zxl and bz_0 predictors still had f10 f11 and f19 weights. The pg4 puff is on from -1.59sec to 0. Supposedly, this gave what they wanted before. Load into model Load at 31-Jul-2007 11:54:05.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Should be ready for first shot, whenever the beam guys are ready.
Jul 31 2007 01:00:27:477PM		Steve Wolfe	SHot#1: Gas wasn't enabled correctly. Was on fill select instead of hybrid enable. Try again.
Jul 31 2007 01:07:51:440PM		Steve Wolfe	SHot#2: Try again. Got gas this time. Just over 1mTorr on ratiomatic Got beam. Steve is satisfied with puff.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	12:55:43:550PM	Test	Bad	Hybrid Select fof Gas Missed
2	01:04:37:437PM	Test	Ok
3	01:13:48:447PM	Test	Ok
4	01:25:15:193PM	Test	Ok
5	01:34:15:563PM	Test	Ok
6	01:43:58:607PM	Test	Ok
7	01:52:45:710PM	Test	Ok
8	02:02:32:457PM	Test	Ok
9	02:11:39:920PM	Test	Ok
10	02:21:10:600PM	Test	Ok
11	02:33:50:570PM	Test	Ok
12	02:42:38:643PM	Test	Ok
13	02:52:55:920PM	Test	Ok
14	03:01:59:553PM	Test	Ok
15	03:11:54:597PM	Test	Ok
16	03:20:36:187PM	Test	Ok
17	03:29:53:120PM	Test	Ok
18	03:38:59:657PM	Test	Ok
19	03:48:55:843PM	Test	Ok
20	03:57:55:067PM	Test	Ok

System Availability

Jul 31 2007 12:55:16:940PM

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 and operational, data in the tree. Outboard midplane AXUV calibrated and operational, data in the tree. Full midplane and divertor views being digitized. Jul 19 2007 04:48PM (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. 4-strap configuration. Max ~ 3 MW. Jul 17 2007 03:52PM (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 calibrated and operational, data being stored in tree. Divertor views showing significant noise, and not available. Upper view being digitized and analyzed. Jul 19 2007 04:49PM (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 50, 60, 75 88, 88l,88u and 110 are operational. 60GHz is a little noisy. Variable frequency channel set at 6.473V (~130GHz), not a clear signal. Jul 26 2007 07:14AM (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 -120.0mm. Density is calibrated according to Raman scattering results from 26 May, supplemented with ECE cutoffs obtained on shot 1070531015. Jul 24 2007 06:49PM (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