Miniproposals

Miniproposal: 523 Date Filed: 1/23/2008 Title: Effect of Lower Hybrid Current Drive on Rotation profile First Author: Alex Ince-Cushman Session Leader: Alex Ince-Cushman (shots 1-13)

Engineering Operator Run Comment

MP 523: Effect of Lower Hybrid Current Drive on Rotation Profile Sessio

Session Leader Plans

Entered: Jan 30 2008 07:12:50:640PM

Author: Alex Ince-Cushman

MP 523: Effect of Lower Hybrid Current Drive on Rotation Profile Session Leader: Alex Ince-Cushman PhysOp: Jim Irby The goal of this experiment is to conduct a LH phase scan at fix power, to see the effect of LHCD on rotation profile evolution. Diagnostics: Hirex-sr, Thomson, Edge Thomson, Bolometer arrays, McPherson, PCI, Hard X-ray Camera Step 1: Reproduce trophy shot of LH induce rotation (1-2 shots) - shot 1080123022 - LH phase of 90, start at 0.8s for 500ms Step 2: Repeat baseline shot with no LH (1-2 shots) Step 3: Phase Scan - Perform phase scan at: 60, 90, 120 (4-5 shots) - Cell access: Switch LH hardware for phasing from -120 to -60 - Perform phase scan at: -60, -75, -90, -120 (5-6 shots) - Cell access: Switch LH hardware for phasing from 150 to 210 - Perform phase scan at: 150, 180, 210 (4-5 shots) Step 4: Locked mode discharge (time permitting) for Hirex-Sr calibration - Repeat discharge 108016016

Physics Operators Plans

Entered: Jan 30 2008 05:32:59:913PM

Author: Jim Irby

----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:30 ****** We will take two test shots for the OH protection system following the run. ****** Power systems as on: 1080123022 Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled Gas setup: Fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) fill NINJA with 10 psi D2 DISABLED Enable gatevalves and shutters: ECE, VUV, DNB, Z-bolo Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): yes ICRF(yes/no): no LH(yes/no): yes DNB(yes/no): no Cryopump (yes/no): no Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/60 s

Session Leader Summaries

Entered: Jan 31 2008 05:16:13:167PM

Author: Alex Ince-Cushman

We had a total of 2 plasma discharges, neither of which had any LH. As a result no progress was made on the MP.

Physics Operator Summaries

Entered: Feb 1 2008 09:42:05:277AM

Author: Jim Irby

We got our first plasma today at 10:00 after a debug of the alternator field supply control circuitry. Turned out to be a failed local/remote switch on the supply. Then on shot 01 we had a TF crowbar and a ground fault indication. This problem was eventually tracked down to a bad MC14538B one Shot for the TF Crowbar (5 cents worth of hardware did us in for the day). The crowbar also resulted in a metal fluorescent light cover in the TF crowbar cabinet coming loose and possibly contacting the TF bus (ground faults?). After several no power or TF only test shots, we got another plasma on shot 008. Since the TF inversion time was still set at 100 ms, the TF ramped down throughout the discharge, and we ended up with a q95 of 2. Finally, we got a full length discharge into rampdown on shot 009. No TF faults during either shot. We were able to request and maintain very low densities today with nl_04 at 3e19/m^2 and a few Torr-l/s of gas required most of the shot. From shot 10 on we were doing tests of the new OH protection computer. Steve Wolfe's summary of that work: Following the successful tests of Willy Burke's oh2 force computer on 31-Jan-2008 (shots #1080131011,012,013), I have disabled the dpcs_type2_fault procedure. The afol receiver used to receive this fault signal has been removed and the wiring in the fault chain modified to accept the Burke circuit (see Willy and Bill Cochran for details). For the time being I will leave the software procedure loaded but disabled in \hybrid::top.hardware.dpcs.loadables.procedures:output_pros:procedure_00 and will not reassign the output fiber associated with this function, so the software option will be available on demand. I hope it is not needed again. The secondary function that sets all dpcs power system outputs to zero on detection of out of range inputs remains active, as a backup feature. DPCS is no longer checking for out of range inputs during the pulse. The backup feature mentioned in the last sentence refers to the baseline checking routine which operates at t=-2sec, prior to power supply turn on times. If a bus rogowski signal is out of normal range at that time, dpcs will not issue waveform commands to any supplies and an error is flagged in the dpcs log file. This feature would have prevented the control problem last March which initiated the concerns over coil stresses with opposing oh currents, etc.

Session Leader Comments

Physics Operator Comments
Jan 31 2008 09:14:22:047AM		Jim Irby	Gary and Andy have found an offset problem with D-Right Vertical. It is 10C colder than indicated in control room. Problem likely solder joint or reed relay. Joe will take care of offset in software until we can debug next week. We will watch D-Top and -Bottom today to make sure no other issues arise.
Jan 31 2008 12:08:50:420PM	1080131001	Jim Irby	09:10 ---- Delay as we wait for alternator field supply to come back online 09:40 ---- Probably a control issue with supply, but nothing found as yet 10:02 --- Fixed --- failed local/remote switch Loaded 1080123022 into PCS: Ip 750 kA, nl_04 3e19/m^2, LSN I have left prepuff unchanged at 23 ms --- startup shot had no hards loaded plasma --- lost all breakers ---- TF crowbar The metal cover to a lamp in the TF crowbar cabinet came loose and was probably in contact with the TF bus possibly generating enough noise in the cabinet to cause erratic firing on the crowbar. The fluorescent lamp was shattered and pieces spread around the cabinet. We are cleaning up the cabinet, checking fuses, etc...
Jan 31 2008 11:58:31:143AM	1080131002	Jim Irby	fuses checked --- okay TF resistance to ground checked --- clear --- no fault indication We will try a 50 kA TF test under hybrid control: 50 kA at t=-1.0 rampdown starting at +50 ms TF crowbared again (at low current). So we still have a problem; but it's in the crowbar cabinet! No indication of TF groundfault
Jan 31 2008 12:44:07:867PM	1080131003	Jim Irby	No power test to check crowbar circuits
Jan 31 2008 12:57:39:757PM	1080131004	Jim Irby	TF crowbar test --- no power
Jan 31 2008 02:03:23:943PM	1080131005	Jim Irby	Another TF test is next --- setup scope to look at gates 25kA under PLC control Crowbar again --- spurious gate signals seen
Jan 31 2008 04:19:09:850PM	1080131006	Jim Irby	Gates to data system master control cabinet signals going to crowbar are also now being digitized alt phase imbalance fault signal checked out okay 16:15 --- possible bad chip found in master control cabinet 25 kA test ---- no crowbar --- current trace looks good
Jan 31 2008 04:39:04:187PM	1080131007	Jim Irby	150 kA TF only test under PLC control good TF pulse ---- no ground faults
Jan 31 2008 05:08:25:233PM	1080131008	Jim Irby	loaded from 1080131001 loaded argon enabled for 125 ms from 0.3 s try for plasma plasma for 1 s as TF field ramped down --- operator error no ground faults q95 of 2 or so --- TF down to 1.99T
Jan 31 2008 05:17:32:807PM	1080131009	Jim Irby	dpcs repeat Eng OPS loaded from shot 1 plasma into rampdown --- all set for tomorrow
Jan 31 2008 05:24:58:740PM	1080131010	Jim Irby	Willy goes into power room to setup OH protection computer... Remainer of shots today will be tests of this new system

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	10:03:25:670AM	Plasma	Ok	All P.S. crowbared after the shot
2	11:48:32:913AM	Test	Bad	TF 50KA Hybrid ctrl
3	12:44:23:040PM	Test	Ok	Tf No Power Shot
4	12:56:30:977PM	Test	Ok	TF No Power Test Shot
5	01:41:51:420PM	Test	Ok
6	04:15:48:300PM	Test	Ok	TF PLC test
7	04:34:47:243PM	Test	Ok	TF 150 KA PLC Test
8	04:54:52:330PM	Plasma	Bad	Engineering Operator Error Loading the shot
9	05:07:44:407PM	Plasma	Ok
10	05:38:29:190PM	Test	Ok	State Operator Error No Excitation
11	05:49:28:437PM	Test	Bad	OH2 Supply Voltage was set to zero
12	06:11:17:527PM	Test	Ok	OH force test
13	06:26:07:323PM	Test	Ok	OH force test

System Availability

Jan 31 2008 10:03:04:760AM

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,rowan Bolometers yes Diode 2pi working fine, foil 2pi being low-pass filtered to remove noise. Outboard miidplane AXUV fine. Midplane foils working fine, but need to fill tree with calibrations. 2D AXUV arrays are being digitized but need further debugging and calibration. Dec 19 2007 07:16PM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization no First Boronization 5/9/07 Bottle has been removed from the cell Sep 14 2007 12:42PM (dekow) Jim Irby Boronization dekow,irby CNPA yes Single channel CNPA available as of 12/1707 Dec 17 2007 05:48PM (parker) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor yes Cryopump is operational Dec 11 2007 10:13AM (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=[74.2:86.3]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. Nov 27 2007 10:21AM (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 Nov 26 2007 04:23PM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe Dalsa yes optics repaired, camera re-installed, and view has been re-calibrated Nov 27 2007 09:54AM (marmar) Earl Marmar Visible Bremsstrahlung marmar Disruption Mitigation no   Nov 20 2007 10:47PM (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   Nov 20 2007 10:47PM (granetz) Robert Granetz Diagnostic Neutral Beam beals,granetz FRC-ECE no Problem with LO's Jan 10 2008 01:17PM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips G-Side Ratiomatic yes Gauge is operational and calibrated against G-side MKS on shot#1071127002 Nov 27 2007 01:25PM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland GPC yes All 9 channels operational as of new year. Jan 03 2008 09:31AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPC2 yes Most channels operational. Jan 02 2008 12:22PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt GPI no Neither the Xpt-view nor the midplane-view camera is operational. Nov 26 2007 04:25PM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes Should be operational for the FY08 campaign Nov 27 2007 09:54AM (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 no Be Window has a leak and so the gate valve is closed Nov 23 2007 12:50PM (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 available (quarter-wave transformer for pre-matching) Dec 11 2007 09:01AM (ylin) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna yes available (with FFT for automatical matching) Dec 11 2007 09:01AM (ylin) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes normally in [0,pi,pi,0] phase for heating. current drive phase available if requested. Dec 11 2007 09:03AM (ylin) Steve Wukitch J-port antenna wukitch,ylin Lower Hybrid yes Body I Fault Circuits Repaired and tested. High power tests completed Dec 05 2007 06:40PM (dterry) Ron Parker Lower Hybrid dterry,parker LPI yes 1/9/08 Jan 09 2008 03:23PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha yes Midplane working fine, emissivity profiles being stored in tree, but still need to apply in-vessel calibrations to data. WB1-LY being digitized, but not processed in tree. Dec 09 2007 06:53PM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke McPherson yes Working fine. Nov 29 2007 01:36PM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry Michelson yes Working, moderate speed for now. Jan 02 2008 01:19PM (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 We are basically awaiting the DNB & its new aperture. MSE itself is OK. 5 photo detectors have been shipped out for repair, so currently only 5 channels are available. We expect the full channels will be available late in Jan 08. Jan 04 2008 01:11PM (jinseok) Steve Scott Motional Stark Effect jinseok,sscott Neutrons yes Voltage is on for the He3 bank. Voltage will be turned on for the global system at the first plasma attempts. Nov 26 2007 08:31AM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes calibration unchanged from 2007 campaign Dec 04 2007 08:56PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby NINJA yes All capillaries displayed by the NINJA_CONTROL GUI have been tested. Nov 26 2007 04:26PM (terry) Brian LaBombard NINJA gas puff labombard,terry PCI no Both CO2 and HeNe Lasers are disabled----- safe for machine entry. Sep 14 2007 03:21PM (lianglin) Miklos Porkolab Phase Contrast Imaging edlund,lianglin,ntsujii,porkolab Penning Gauges yes All gauges except B_DivL are operating Nov 27 2007 01:31PM (labombard) Brian LaBombard Penning Ionization Gauges labombard Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Nov 26 2007 04:27PM (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 Probe Array - ISD yes Operational Nov 27 2007 01:40PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH yes Operational Nov 27 2007 01:40PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes Operational Nov 27 2007 01:41PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard Probe Array - UDIV yes Operational Nov 27 2007 01:41PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes 50, 60, 75 and 88GHz channels are connected and being tested for the campaign Dec 18 2007 10:28AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Operational, but needs to be checked with plasma. Nov 27 2007 01:45PM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes FSP is operational Dec 11 2007 10:13AM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP yes A- and K-port WASP electrodes have been replaced/tested. Nov 27 2007 01:44PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick TCI yes CO2 Laser is on --- initial alignment complete Nov 16 2007 01:23PM (irby) Jim Irby Two-Color Interferometer irby,murray TS - Core yes 8 polychromators, 1 laser. Density is calibrated for YAG2. YAG1 is not calibrated yet. Jan 17 2008 11:51PM (yma) Jerry Hughes Core Thomson scattering jwhughes,yma TS - Edge yes System is working. Density is derived with last year's calibration, and should be good to within ~20%. Jan 18 2008 07:27AM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf XTOMO yes system operational Jan 10 2008 11:41AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke