Miniproposals

Miniproposal: 519 Date Filed: 12/19/2007 Title: Spectroscopic rotation and temperature measurements of the majority species in the edge using 4He First Author: Alex Graf Session Leader: Alex Graf (shots 1-30)

Engineering Operator Run Comment

MP 519 Main ion rotation and temperature measurements in helium plasmas

Session Leader Plans

Entered: Mar 24 2008 06:55:45:653PM

Author: Alex Graf

MP 519 Main ion rotation and temperature measurements in helium plasmas SL: A. Graf/D. Whyte PO: J. Irby Startup and Optimization (Note: start up in He plasmas was last done on 1070608) 5 shots max 1) Up to 5 shots to optimize He II 468.6 nm CX signal and check left/right gaps and strike point location. Use equilibrium - 1080321032 Ip - 800 kA Bt - 5.4 T Modulated DNB (50 ms high 40 ms low) No RF vary neL04 from 6e19 m-2, 8e19 m-2 and 1e19 m-2 (more or less is tbd) 2) (NOTE: the shot numbers (1-8) below are symbolic for reference throughout the day. They are not literal shot numbers) LSN equilibrium - 1080321032 USN equilibrium - 1080319020 Modulated DNB (50 ms high 40 ms low) on all shots. RF times t1 = 0.7-1.0 s, t2 = 1.0-1.3 s (two values at two times within one shot) -------------------------------------------- shot | RF (MW) t1, t2 | nel04 (m-2) | equil | -------------------------------------------- 1 | 0, 1 | A | LSN | ------------------- 2 | 2, 3 | A | LSN | ------------------- 3 | 2, 3 | A | USN | ------------------- 4 | 0, 1 | B | LSN | ------------------- 5 | 2, 3 | B | LSN | ------------------- 6 | 2, 3 | B | USN | ------------------- This is to be repeated 3 times. The densities A and B are to be decided within the optimization portion step (1). if time permits: -------------------------------------------- shot | RF (MW) t1, t2 | nel04 (m-2) | equil | -------------------------------------------- 7 | 2, 3 | C | LSN | -------------------- 8 | 2, 3 | C | USN | -------------------- repeat this 3 times. The density C is to be decided. Enables: -He-4 working Gas -inner wall 10 psi D2 ninja puffing -Close gate valves

Physics Operators Plans

Entered: Mar 24 2008 08:44:54:670PM

Author: Jim Irby

----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1080321032 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 Helium 4 Hybrid ENABLED (PG3) fill NINJA with 10 psi D2 ENABLED 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): yes LH(yes/no): no DNB(yes/no): yes Cryopump (yes/no): no Vessel temperature: 35/35/35 --------------- ECDC Parameters --------------- gas and pressure: Helium at 5e-5 Torr sweep: 44/45/103 cm scan: 20/120 s

Session Leader Summaries

Entered: Mar 25 2008 08:49:49:353PM

Author: Alex Graf

30 shots (26 plasmas, 3 fizzles and 1 dud) Despite not reaching every goal outlined in MP 519 it was overall a successful run. The deuterium density had to be decreased by turning off NINJA (D2 puffing) and cooking the walls with succesive RF discharges. The DNB CX enhancement for the 468.6 nm line in He II was small but probably useful. As a result of the meager CX enhancement a non-evolving background was necessary. This restricted the discharge to be L-mode only. THis also restricted the RF to be a single value during each shot instead of the steps envisioned in the SL_Plan. A density and RF power scan (2 points each) was possible obtaining time resolved spectra from 4 spatial points toroidally and poloidally at the outer wall. There was a single attempt (shot 30) to get a boron based Er measurement at one power and density for comparison. Mention was made of an equivalent to EDA H-modes in Helium plasmas. This was later determined to be slightly erroneous due to the high deuterium level. As the neutron count dropped wrt previous deuterium discharges (implying a majority helium plasma) the transient H-modes appearing in past helium runs were present.

Physics Operator Summaries

Entered: Mar 25 2008 05:21:46:973PM

Author: Jim Irby

Machine ran well today. However we did have a leak following shot 14 that resulted in a fizzle on shot 15. We also had a fizzle, possibly because of too much gas, on shot 22. The leak appeared when the average vessel temperature was about 21C. Switching the cooling from warmest vertical leg to average vertical control may have fixed the leak (at a pump speed of 7 psi). Too little gas may have caused a fizzle on shot 29. We started up the machine with a deuterium prefill, but had 10 psi of helium 4 in the main plenum. The density overshot on the first discharge of the day, but then was under control the rest of the day. We found the the NINJA deuterium puff was keeping us from getting a very pure helium plasma and it was disabled early in the run. The neutron rates then decreased rapidly over several shots. We had a problem with STATE as we attemped shot 27. When we tried to take the shot we had the the EF1s in PLC control for some reason and had a dud. STATE had to be rebooted earlier in the run. I had the argon pulse setup for 175 instead of 75 ms for a few shots early in the run. fizzles 15, 22, 29 dud 27 (no ef1s) problems today: rf pickup from open coax in power room leak following shot 14 STATE had to be rebooted STATE hang

Session Leader Comments
Mar 25 2008 10:21:43:147AM	1080325004	Alex Graf	very good He CX on shot 1. degraded on shot 2. nill on shot 3. try and reproduce shot 1. maybe there is a density sweet spot neL04~7.5 e19 m-2. still optimizing CX.
Mar 25 2008 10:33:13:927AM	1080325005	Alex Graf	the He CX enhancement returned though not as good as shot 1. try dropping the current to 650 kA.
Mar 25 2008 11:22:30:320AM	1080325008	Alex Graf	He CX enhancement is small but useful. Possible equivalent to an EDA H-mode. Repeat with RF to continue outgassing.
Mar 25 2008 11:51:28:350AM	1080325010	Alex Graf	DNB dropped out during H-mode. repeat.
Mar 25 2008 12:49:11:913PM	1080325013	Alex Graf	clear He CX enhancement. deuterium coming down. next shot: Ip = 650 kA , all else the same.
Mar 25 2008 12:51:04:240PM	1080325015	Alex Graf	Ip=800 kA, 1 MW RF, try to get rid of transient H-modes.
Mar 25 2008 01:33:29:537PM	1080325017	Alex Graf	neL04 ~ 9e19 m-2, 1MW RF
Mar 25 2008 01:46:43:570PM	1080325018	Alex Graf	neL04 ~ 9 e19 m-2, 2 MW RF
Mar 25 2008 01:57:30:007PM	1080325019	Alex Graf	neL04 ~ 9e19 m-2, 2 MW RF, USN
Mar 25 2008 03:00:41:897PM	1080325021	Alex Graf	switched to toroidal active beam views. repeat of last shot. USN, neL04 ~ 1e19 m-2, and 2 MW RF.
Mar 25 2008 03:39:18:443PM	1080325022	Alex Graf	Back to LSN, neL04 ~ 6e19 m-2, 2 MW RF
Mar 25 2008 03:38:45:677PM	1080325024	Alex Graf	LSN, neL04~7e19 m-2, 1 MW RF
Mar 25 2008 03:46:42:570PM	1080325025	Alex Graf	LSN, neL04~9e19 m-2, 1 MW RF
Mar 25 2008 04:05:14:020PM	1080325026	Alex Graf	LSN, neL04~9e19 m-2, 2 MW RF
Mar 25 2008 04:15:16:083PM	1080325027	Alex Graf	LSN, neL04~9e19 m-2, 1 MW RF (redo - spectrum saturated)
Mar 25 2008 05:07:32:163PM	1080325029	Alex Graf	mit-cxrs views are all back in place. I am now looking toroidally at inner-wall He puff into He plasma. (NINJA triggers at 0.6 (for 150 ms) and 1.0 (for 100 ms) at B16-001) LSN, neL04~7.5e19 m-2, 2 MW RF.

Physics Operator Comments
Mar 25 2008 09:16:51:030AM	1080325001	Jim Irby	load from 1080321032 (not needed since it was the last shot from Friday, but)... import seg2 from 1080319020 into seg4 seg3 is still the locked mode segment loaded argon is currently set at 100 ms from 300 to 400 ms prefill from 22 ms to 25 ms (helium ecdc, may require more gas) loaded main gas 40 psi helium 4 nl_04 request 8e19/m^2 plasma into rampdown --- very fast density rise at 200 ms, gas hard off
Mar 25 2008 09:38:27:833AM	1080325002	Jim Irby	nl_04 request to 6e19/m^2 until 1 s, then negative reduced early density rise time --- get rid of "MARFE"? loaded gatevalve toggle enables (300 s) plasma into rampdown --- MARFE gone, some x-rays density request nearly met had 1 MW of rf
Mar 25 2008 10:12:30:240AM	1080325003	Jim Irby	nl_04 density request at 8e19/m^2 until 1.4 s Will have to enter power room to blank off transmitter coax. RF pickup on at least the a-coil current, maybe other things. 41 minutes later... Andy was waiting for the shot and we were waiting for Andy. density into rampdown --- icrf 1 MW, pickup on a-coil current gone
Mar 25 2008 10:32:17:723AM	1080325004	Jim Irby	nl_04 back to 6e19/m^2 (SL wants shot 1 again w/o MARFE) loaded density into rampdown --- no gas needed beyond 0.46 s, but SL still needs lower density
Mar 25 2008 10:40:12:287AM	1080325005	Jim Irby	Ip request to 650 kA loaded plasma --- I let Ip overshoot too much nl_04 still too high
Mar 25 2008 10:55:05:287AM	1080325006	Jim Irby	density rise slowed down Ip overshoot fixed I hope loaded plasma ---- Ip okay, early density lower, but still too high after 0.5 s or so
Mar 25 2008 11:10:23:303AM	1080325007	Jim Irby	repeat with ICRF plasma --- icrf brings in some gas/dirt --- density rise
Mar 25 2008 11:16:33:070AM	1080325008	Jim Irby	repeat --- continue icrf/wall conditioning plasma --- h-mode, 2.1 MW icrf
Mar 25 2008 11:35:15:427AM	1080325009	Jim Irby	repeat --- continue to condition 16 minutes in recool --- had to reboot state machine plasma --- early thrash --- raise prefill next shot
Mar 25 2008 11:46:42:570AM	1080325010	Jim Irby	prefill from 25 to 27 ms Ip from 650 to 800 kA loaded plasma --- nice h-mode
Mar 25 2008 12:08:58:473PM	1080325011	Jim Irby	no changes plasma ---- DNB is good
Mar 25 2008 12:24:02:677PM	1080325012	Jim Irby	repeat w/o NINJA plasma --- no eda
Mar 25 2008 12:26:42:473PM	1080325013	Jim Irby	repeat (should have been 650 kA though) plasma --- density dropping relative to shot 11
Mar 25 2008 12:47:24:520PM	1080325014	Jim Irby	Ip request back down to 650 kA loaded plasma --- neutron rate coming down since shot 11
Mar 25 2008 01:04:47:177PM	1080325015	Jim Irby	Ip request to 800 kA loaded Argon from 0.3 to 0.375 s --- enabled loaded fizzle --- vacuum leak at 21C --- BP at 5e-6 Torr CII up, z-meter high, halpha down Dropped back LN2 pump to 5 psi --- leak still getting worse
Mar 25 2008 01:31:47:320PM	1080325016	Jim Irby	We suspect c-hor as the leaking flange LN2 pump off leak coming down --- LN2 pump to 3 psi plasma --- no h-modes --- 1 MW ICRF
Mar 25 2008 01:40:31:397PM	1080325017	Jim Irby	nl_04 request to 9e19/m^2 loaded plasma
Mar 25 2008 02:00:06:570PM	1080325018	Jim Irby	no dpcs changes --- icrf to 2 MW leak returned, but not bad enough to cause a fizzle plasma ---
Mar 25 2008 02:12:58:177PM	1080325019	Jim Irby	seg2 off seg4 on --- upper single null argon from 300 to 375 ms (I hope) plasma --- early density rise programming a little different than shot 17. Will copy seg 2 nl_04 to seg 4 nl_04 for shot 20
Mar 25 2008 03:05:01:350PM	1080325020	Jim Irby	copied nl_04 seg 2 to seg 4 loaded plasma
Mar 25 2008 03:05:35:757PM	1080325021	Jim Irby	Alex goes to switch fibers in recool approx 30 minutes plasma --- a couple of injections prefill a little low
Mar 25 2008 03:27:04:287PM	1080325022	Jim Irby	prefill from 28 to 29 ms import seg 2 from 1080325016 into seg 2 loaded fizzle --- pressure high? dBzo/dt rather slow compared to shot 21
Mar 25 2008 03:40:16:787PM	1080325023	Jim Irby	prefill from 29 to 28 ms plasma --- lots of hards
Mar 25 2008 03:45:40:287PM	1080325024	Jim Irby	dpcs repeat plasma
Mar 25 2008 03:54:38:473PM	1080325025	Jim Irby	import seg 2 from 1080325017 into seg 2 loaded plasma
Mar 25 2008 04:13:47:163PM	1080325026	Jim Irby	dpcs repeat plasma
Mar 25 2008 04:37:08:303PM	1080325027	Jim Irby	repeat dpcs problem with STATE no EF1 supplies...
Mar 25 2008 04:53:14:867PM	1080325028	Jim Irby	try again plasma --- moly injection late in discharge
Mar 25 2008 05:04:00:117PM	1080325029	Jim Irby	import seg 2 from 1080325013 into seg 2 loaded fizzle --- serious thrash --- will add 1 ms to prefill

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:03:30:120AM	Plasma	Ok
2	09:21:56:233AM	Plasma	Ok
3	10:06:24:960AM	Plasma	Ok
4	10:19:12:287AM	Plasma	Ok
5	10:32:26:833AM	Plasma	Ok
6	10:44:57:787AM	Plasma	Ok
7	10:57:49:050AM	Plasma	Ok
8	11:10:32:570AM	Plasma	Ok
9	11:28:50:037AM	Plasma	Ok
10	11:41:39:507AM	Plasma	Ok
11	11:54:22:537AM	Plasma	Ok
12	12:06:55:193PM	Plasma	Ok
13	12:20:20:367PM	Plasma	Ok
14	12:34:40:257PM	Plasma	Ok
15	12:50:37:257PM	Plasma	Ok
16	01:18:38:380PM	Plasma	Ok
17	01:35:06:990PM	Plasma	Ok
18	01:47:25:630PM	Plasma	Ok
19	02:05:57:117PM	Plasma	Ok
20	02:29:31:663PM	Plasma	Ok
21	02:59:16:193PM	Plasma	Ok
22	03:12:12:943PM	Plasma	Ok
23	03:24:59:770PM	Plasma	Ok
24	03:38:29:803PM	Plasma	Ok
25	03:51:01:177PM	Plasma	Ok
26	04:06:17:850PM	Plasma	Ok
27	04:33:24:397PM	Plasma	Ok
28	04:46:03:223PM	Plasma	Ok
29	04:58:37:380PM	Plasma	Ok
30	05:11:05:927PM	Plasma	Ok

System Availability

Mar 25 2008 09:03:21:777AM

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 has a grounded channel which is disrupting the whole array OFFLINE for now. Midplane foils working fine, but need to fill tree with calibrations. 2D AXUV arrays are being digitized but need further debugging and calibration. Mar 14 2008 11:09AM (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 yes 16 Channels now working - low freq. side - outer Rmids Feb 19 2008 09:56AM (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 no Problems with detector. No quantitative line brightnesses possible. Qualitative tasks like impurity identification possible. Feb 15 2008 02:07PM (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. Feb 21 2008 08:51AM (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 yes working Feb 29 2008 07:00PM (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 System is connected....there have been problems with getting data on the week of 3/18-3/20, but the system seems to be OK for 3/21. channels 50,60,88 and 110 are connected. Mar 21 2008 08:12AM (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 12 polychromators (#1~8,9,11,13,15), 1 laser. Density is calibrated for YAG1 based on ECE cutoff data taken on Mar11. YAG2 is offline. Mar 14 2008 09:59AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma TS - Edge yes System is working with 3 out of 4 spectral channels and should be believable for Te>50eV, ne>3e19. Density is calibrated from both Raman scattering in D2 (3/2/08) and from edge ECE cutoffs in high-density H-modes (1080228014). Mar 17 2008 10:26AM (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, but channels have been dying...stay tuned. Mar 14 2008 11:10AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke