Miniproposals

Miniproposal: 506 Date Filed: 7/12/2007 Title: H-modes with cryopumping in upper single null topology First Author: Jerry Hughes Session Leader: Jerry Hughes (shots 1-1)

Engineering Operator Run Comment

1st Half Day MP506: H-modes with cryopumping in USN SL: Jerry Hughes 2nd

Session Leader Plans

Entered: Aug 7 2007 04:36:40:070PM

Author: Jerry Hughes

__AM run plan__ MP506: H-modes with cryopumping in USN Run B: normal field direction SL: Jerry Hughes PO: Jim Irby This run is intended to complete the evaluation of pedestal and global H-mode response to cryopumping. It will be run in USN topology to maximize particle flux to the pumping slots. Requirements: **Overnight boronization as for run 1070803: rmin/rmax/rdwell 60/80/75 scan 20/120 foreline pressure 40mTorr **Diagnostics Edge and core Thomson, ECE diagnostics, CXRS, bolometer arrays, PCI, reflectometry, Hirex **Gas NINJA plenum loaded with 10psi D2 Argon puff: 50ms at 0.3s (Argon at 1psi) **ICRF at least 3MW available flat waveforms from 0.7 to 1.5s **cryopump available by second shot Shot sequence: A. 800kA shots 1. First shot should be a near repeat of 1070614028 (5.4T, 800kA, USN). Raise target nl04 to 1e20. Apply 3MW of ICRF heating. Pump WARM. 2. Repeat 1. with pump COLD. 3. Repeat 2. with target nl04=8e19, pump COLD. 4. Repeat 3. with target adjusted, based on results of 2--3. Pump COLD. B. 600kA 1. Lower Ip to 600kA, nl04-->8e19. Prf=3MW. Pump WARM. 2. Repeat 1. with pump COLD. 3. Repeat 2. with target nl04=6e19, pump COLD. 4. Repeat 3. with target adjusted, based on results of 2--3. Pump COLD. C. 400kA 1. Lower Ip to 400kA, nl04-->6e19. Prf=3MW. Pump WARM 2. Repeat 1. with pump COLD. 3. Repeat 2. with target nl04=4e19, pump COLD. 4. Repeat 3. with target adjusted, based on results of 2--3. Pump COLD. If time remains, proceed to D,E: D. Choose a promising low collisionality pumped H-mode target from A--C. and repeat with maximum availabe RF. E. Choose a low Ip, low density pumped target from B--C. Rerun with a current ramp up to 1MA from 1.1 to 1.5s, to see if low density H-mode can be maintained with Te,PED rise.

Physics Operators Plans

Entered: Aug 7 2007 05:16:22:710PM

Author: Jim Irby

1st Half Day MP506: H-modes with cryopumping in USN Run B: normal field direction SL: Jerry Hughes PO: Jim Irby 2nd Half Day MP 468: LH Driven Fast Electron Diffusion Time Measurements SL: Andrea Schmidt PO: Jim Irby Overnight Boronization: rmin/rmax/rdwell 60/80/75 scan 20/120 TC6 pressure 40mTorr 50 psi change in diborane bottle pressure (approx 8 hours) no post-boronization ECDC Power systems as on 1070614028 (5.4T, 800kA,USN) A-coil configuration: normal [Dtop -Dbot -Jtop +Jbot] and enabled. Gas Setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid ENABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) NINJA 10 psi deuterium, ENABLED Enable the following gate valves and shutters: ECE, VUV, Z-bolo shutters, DNB Torvac setup: Gate valves open during pulse. ICRF: D E and J-port ready at the beginning of run LH: Ready for operation in the early afternoon CRYOPUMP: Ready for operation on the first shot

Session Leader Summaries

Entered: Aug 9 2007 10:12:36:160AM

Author: Jerry Hughes

This run was intended to assess cryopumping in USN H-modes, with field in the standard direction. Shot 1 went as programmed, though with a MARFE and uncontrolled density rise. There was no ICRF and no H-mode. There was also, it turned out, a TF ground fault indication that we didn't ask for. The run was scrubbed in order to locate the problem.

Physics Operator Summaries

Entered: Aug 8 2007 12:41:26:933PM

Author: Jim Irby

This run was proceeded by an overnight boronization. Shot 001 looked very good, but had to stop run to investigate a ground fault indication on the TF.

Session Leader Comments
Aug 8 2007 10:13:18:637AM	1070808001	Jerry Hughes	Roaring start. Pump WARM. Ip, Bt, shape look good. Big MARFE early, and density takes off (nl04>1.2e20). No significant RF. No H-mode. Cell access to diagnose and fix various problems. Next shot: Retry with pump cold. Try to get better density control. Update: TF instrumentation is being checked thoroughly to find source of apparent ground fault on shot 1. The delay will be a long one.

Physics Operator Comments
Aug 8 2007 09:24:32:863AM	1070808001	Jim Irby	import seg 1 of 1070807030 into seg 1 import seg 3 of 1070614028 into seg 2 import seg 2 of 1070523021 into seg 3 seg 1 is toggled on seg 2 is toggled on seg 3 off recal of magnetics done for seg 2, 3, and 4 (pre f19 fault shots) pg1 in seg 2 from 100 to 50 ms (Argon) loaded to tree nl_04 request to 1e20 /m^2 loaded to tree prefill to 20 ms from 32 ms (no cryopump for shot 1) loaded to tree About 9 minutes into the cryopump cooldown we had a burst of nitrogen from 3e-9Torr to 4e-8Torr mass 28 on RGA-1. Mass 14 also went up. No change on other lines. IGT went from 8.1e-8 Torr to 2e-7 Torr. After the pump cools down the basepressure still dropped down to low 10-8 scale. Asked Andy to make sure we had extended tf and oh delays and inversion times to protect oh coax plasma into rampdown --- large marfe Jerry is happy with plasma shape (but not marfe) cell entry to open CXRS shutter DNB is ready to go
Aug 8 2007 12:38:19:837PM	1070808001	Jim Irby	We lost fuses in TF supply and also have currents of up to 80 A on the TF ground fault Pearson starting at 3.902 s. TF current was below 20kA at that point. current also seen on secondary Pearson on TF ground supply current glitch seen about 3.93 s. Asked Alternator to shut down at around 12:30 since it is unlikely we will find and fix the problem in the next couple of hours.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:04:33:230AM	Plasma	Bad	TF Fault

System Availability

Aug 8 2007 09:04:12:103AM

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 and 88u are operational. 60GHz is a little noisy. Variable frequency channel is being tested but still not working properly. It has a waveform voltage of 6.804V (130.2GHz output frequency). 110GHz is not working. Aug 08 2007 08:12AM (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, 8 spatial channels. Density is calibrated based on ECE cutoffs obtained on 4 May 2007. Old spectrometers have been removed. Additional spatial channels have been added, but are not yet calibrated. Aug 07 2007 10:08AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma TS - Edge yes 2 lasers, 20 spatial channels. Fiber holder position is -121.0mm. Density is calibrated according to Raman scattering results from 26 May, supplemented with ECE cutoffs obtained on shot 1070531015. Aug 07 2007 10:08AM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma Vispec yes 350 and 670 nm, 4 spatial channels May 04 2007 01:02PM (agraf) Alex Graf Visible Spectrometer agraf