Miniproposals

Miniproposal: 648 Date Filed: 1/27/2011 Title: Direct boron density asymmetry measurements First Author: Mike Churchill Session Leader: Mike Churchill (shots 1-26)

Miniproposal: 693 Date Filed: 4/30/2012 Title: Validating the inter-shot calibration technique for MSE diagnostics First Author: Bob Mumgaard Session Leader: Bob Mumgaard (shots 27-38)

Engineering Operator Run Comment

EDA H-modes and ELM-free H-modes as part of MP648 SL Churchill PO: Irby

Session Leader Plans

Entered: Jun 20 2012 03:37:47:407PM

Author: Mike Churchill

In-Out Boron Density Asymmetries and Total Impurity Flows Run high collisionality EDA H-modes and ELM-free H-modes as part of MP648 (PART A), and low collisionality ELMy H-modes These shots will be diagnostically optimized for CXRS purposes, including: 1. D2 NINJA puffs from both plenums at the LFS and HFS 2. Tighter L-gap for better HFS view coverage (~6mm) 3. Potential L and R gap scan (fixed plasma volume) of 3mm over 200ms REQUIRED DIAGNOSTICS: edge CXRS, NINJA puffs, DNB, edge Thomson S^3 requested, do not insert till SL gives OK DNB timing: 50ms on/25ms off, start at 0.3s NINJA puffs: 0.9s and 1.3s Fill NINJA plenum with 11psi of D2 RUN PLAN ============================== PART 0: Boronization recovery (~4 shots) Maximum 4 shots. You get no more, C-Mod. PART 1: EDA H-modes (~9 shots). Reference shot: 1120614024. TO CHANGE: L-gap to ~6mm, different RF trace (see above) ICRF step up: 2.5MW from 0.6 to 1.2s, 4MW from 1.2 to 1.5s 1a. Ip=1.0 [MA], nl04=1.0e20 [m^-2] 1b. Ip=0.8 [MA], nl04=0.8e20 [m^-2] 1c. Ip=0.6 [MA], nl04=0.6e20 [m^-2] PART 2: ELM-free H-modes (~5 shots) One ICRF pulse, 3.5MW from 0.6 to 1.5s May try ICRF pulses to force start/stop of ELM-free H-mode 2a. Ip=1.0 [MA], nl04=0.8e20 [m^-2] 2b. Ip=0.8 [MA], nl04=0.6e20 [m^-2] Cell access to change edge Thomson views for JFT-2M shape Adjust NINJA plenum pressure to ~8psi PART 3: ELMy H-modes (~7 shots) Reference shot: 1101214029. TO CHANGE: decrease nl04 demand to compensate for presence of NINJA puffs. ICRF flat: 2.5MW from 0.6 to 1.5s 3a. Adjust reference shot nl04 demand until ELMy H-modes achieved with the gas puffs present. May also have to vary the JFT-2M strike point if the slot isn�??t working 3b. Vary nl04 to vary collisionality

Entered: Jun 21 2012 11:25:53:910AM

Author: Steve Scott

Starting at 5 PM, we will take a series of beam-into-gas shots without fields. Modify setup from 1120524002: add a 300 ms open period for Pulse-gas-4 (-0.400 --> -0.100 sec) and put the pulse-gas-3 waveform to zero.

Entered: Jun 21 2012 06:14:01:487PM

Author: Bob Mumgaard

After the run we are doing some beam into gas shots to characterize the views of the MSE system and the beam width. We have the Halpha grating in the UT spectrometer. We have the MSE LP and the PEMs are out. We have the beam duct monitor connected, the BES fibers are coupled into the spectrometer and currently MSE F02 is connected to A5 via the lens based coupler. The plan is to do a few parts. 0) Test, get correct pressure for good signal level. 2) Vary pressure up x2 and down x1/2, 4 shots. 3) Look through 5 MSE views, 5 shots. Pause and go permutate the BES fibers in the MSE disector, moving them to vertical orientation. Take an ISC shot to get get flatfield. 4) Do a 5-7 point current scan to get beam width measurements. Pause and change the permutation. 5) Repeat the 5-7 point current scan.

Physics Operators Plans

Entered: Jun 21 2012 07:47:17:300AM

Author: Jim Irby

----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 MP648 --- Direct Boron Density Asymmetry Measurements SL: Churchill PO: Irby Power systems as on: 1120614024 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 gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus/LoWEUS Leave z-bolo shutter as is (should be open) Torvac gatevalve toggle (yes/no): no Boronization(yes/no): yes Overnight ECDC (yes/no): yes ICRF(yes/no): Yes LH(yes/no): no Cryopump (yes/no): no DNB (yes/no): yes Vessel temperature: 35/35/35 Overnight boronization (follow the setup of 1120207) dP: 120 psi TC6:76 mTorr TC9:59 mTorr TC3:3.0mTorr piezo: 40.2 % rmin/rdwell/rmax: 44/75/90cm tdwell/tsweep: 60/120 s EF4 current: 0A pulser; on .7 sec. -off .3 sec. Post boronization ECDC ---------------------------- 1st Gas Setup: Gas: He sweep: 44/103/45 cm scan: 20/120 s Pressure: 5.0e-5 Torr Duration:3 Hrs --------------------------

Entered: Jun 21 2012 09:08:22:483AM

Author: Jim Irby

load from 1120614024 Otd TF rampdown start from 1.5 to 1.8 s TF current of 142.5 kA continuous across seg1 to seg 2 transition left-gap for 1120614024 was ~ 0.96 cm adjust CLEARIN by 0.3 cm to get 0.7 cm gap: from -.001 to -.004 m Otd prefill from 15 to 18 ms -------------------------------------------------- disruption at 0.676 s --- moly injection?

Session Leader Summaries

Entered: Jun 21 2012 07:35:42:120PM

Author: Bob Mumgaard

We took some beam into gas shots without field. The good shots were: 27- 1 mtorr 28- 2 mtorr 30- 0.5mtorr 32- 0.7mtorr 33- 3 mtorr for MSE F03 34- "" F09 35- "" F05 Then took ISC shot 503 at posC for flat field Moved BES fibers to vertical position. Couldn't get beam to go. Took ISC shot 504 at posC for flat field Scrubbed rest of run, need to fix beam and revisit to get the beam width.

Entered: Jun 21 2012 09:16:19:220PM

Author: Mike Churchill

These shots sought to vary the collisionality and pedestal parameters in a variety of H-modes (EDA, ELM-free, and ELMy) to study the effect on in-out boron impurity asymmetries and measure the total velocity vector in the pedestal. Overall a productive day, considering the challenges. Parts of the plan were skipped, and others extended. Profile analysis needs to be done to see the range in collisionalities, and compare CXRS density and velocity profiles. The first 9 shots were dedicated to sorting out a variety of issues: 1. Post-boronization (1 shot, by shot #2 full-length EDA H-modes) 2. CXRS channel saturation 3. Shaping changes (should have picked a reference shot from 1110201 instead of 1120614) for H-mode and edge Thomson optimization 4. Software issues preventing Physop from saving changes (eventually had to switch out J. Irby for S. Wolfe) There were a variety of disruptions due to: 1. putting the RF too early during a crossover 2. putting the RF too early, during a time the plasma hadn't fully developed 3. Iron injections during the JFT-2M shape. Moved Surface Science Station (S^3) back, and it worked, not sure if it was the cause. RUN PLAN RESULTS ============================== PART 0: Boronization recovery (~4 shots) Maximum 4 shots. You get no more, C-Mod. => Worked well, first shot disrupted, H-mode on shot #2 PART 1: EDA H-modes (~9 shots). Reference shot: 1120614024. TO CHANGE: L-gap to ~6mm, different RF trace (see above) 1a. Ip=1.0 [MA], nl04=1.0e20 [m^-2] => #10 (many shots before, only saturating on various CXRS channels, and shape not optimized for edge Thomson) 1b. Ip=0.8 [MA], nl04=0.8e20 [m^-2] => skipped 1c. Ip=0.6 [MA], nl04=0.6e20 [m^-2] => #13,#14 PART 2: ELM-free H-modes (~5 shots) One ICRF pulse, 3.5MW from 0.6 to 1.5s May try ICRF pulses to force start/stop of ELM-free H-mode 2a. Ip=1.0 [MA], nl04=0.8e20 [m^-2] => #16 2b. Ip=0.8 [MA], nl04=0.6e20 [m^-2] => skipped => ADDED 2c. Ip=1.1 [MA], nl04=0.8e20 [m^-2] => #17 2d. Ip=1.2 [MA], nl04=0.9e20 [m^-2] => #18 2d. Ip=1.3 [MA], nl04=1.0e20 [m^-2] => #19 PART 3: ELMy H-modes (~7 shots) 3a. Adjust reference shot nl04 demand until ELMy H-modes achieved with the gas puffs present. May also have to vary the JFT-2M strike point if the slot isn�??t working => two working ELMy H-modes shots, #25, #26, though second half of these shots went out, due to either radiation or NINJA gas input, TBD 3b. Vary nl04 to vary collisionality => Never reached

Entered: Jun 22 2012 10:04:36:340AM

Author: Steve Scott

Continuation of MP693 shots 27-38: beam-into-gas, no fields The purpose of these shots is to (a) measure the angle between the MSE sightlines and the DNB trajectory, and (b) to measure the height of the DNB using BES. We accomplished part (a). Beam ran well, but at the end of the night had a power supply problem which terminated the run. At the start of the run, we turned off several trees despite a warning from Steve Wolfe that that would have unexpected and bad consequences. The first few shots were OK, then we ran into unexpected and bad consequences: BES data acquisition, which is in the DNB tree (which was left ON) failed to trigger twice. So we swallowed our pride, turned the trees back on, and after that we experienced no further problems with the BES data acquisition trigger. We also got a nice scan of MSE/BES signal strength versus torus pressure, from about 0.5 mTorr to about 3.2 mTorr.

Physics Operator Summaries

Entered: Jun 22 2012 08:12:00:590AM

Author: Steve Wolfe

Physics Operator Summary for Thursday, 22-Jun-2012 MP#648 Boron Density asymmetry measurements SL: Churchill PO: Irby, Wolfe EO: Pfeiffer, Pierson, Fitzgerald This section of the report primarily covers shot#9-26 (wolfe) I took over as physop at shot#9 because we discovered that Alcdaq3 (alcdata-models) was not correctly copying files from Jim Irby's PCS working directories into the live model directory during the Load_into_Model operation. Loads from my account/directory worked fine all day. Josh verified that a problem existed seeing files in Irby's working directory from alcdaq3 , but was unable to understand why or come up with a fix. There seems to be a very long-lived cache (hours). After several hours, the files from the morning were picked up correctly. No idea how or why this happened. This is therefore an unresolved problem at this time. One of the first physop issues was a request to "increase the elongation", by which the SL really meant that he wanted the upper separatrix intersection with the Thomson Scattering chord to be higher, to place more of the high resolution TS channels in the pedestal region. It turned out that changing ZXU was not the most effective way to do this, and more satisfactory results were obtained by raising the whole plasma raising zcur, first to be flat at -.015m, instead of ramping down as in the reference shot, and then to -.012m. It was in fact the change to -.015 that could not be loaded from Jim Irby's account and led to my taking over as physop. For shot#9, we set up a 4mm radial position scan (both rcur and clearin) which was used for most of the rest of the day. The SL run plan called for 3 current/density steps in EDA h-mode, but because a lot of time had been lost, only the 1MA and 0.6MA cases were run. The 0.6MA case initially had a disruption problem at OH1 crossover, which came during the RF pulse. I speeded up the crossover using the Loadable procedure oh1_crossover (in TEST_PROS), and we delayed the RF a bit and got a satisfactory 600kA shot. Step 2 was ELM-free H-modes at higher current and lower density. It turned out to be necessary (maybe) to turn the oh1_crossover procedure back off, and raise the early density a bit, but we eventually got "good" ELM-free cases at 1.0, 1.1, 1.2, and 1.3MA. A locked mode shot (#20, using seg3) disrupted just after 1sec, but was deemed good enough. We then moved on to ELMy H-mode condition, which was problematic. The reference shot was 1101214029, seg2, which I loaded into seg4. All magnetics predictors (wires 1-8) were recalculated. These shots suffered from Fe injections, perhaps related to the floor strike hitting the missing tile area. Increasing the target density and adjusting the RF timing and program succeeded in getting some decent ELMy examples. Moving the strike point out by moving RXL out by 1cm on shot#24 led had a disruption so we moved it back for 25 and 26, which worked. After the main run was over, the Beam and spectroscopy guys ran a number of beam into gas shots, with Steve Scott as physop. The startup looked kind of ratty most of the day. Halpha had a long flat spot at the peak, sometimes showing bounces, but the rcur postion appeared to be moving in between 10 and 15msec, with a current hesitation. I made several tweaks, reducing EF4 from -1320 to -1300 to raise initial Bz0, but also dropping the pg4, getting down to 15msec, and removing most of the seg1 PG3 puff. This may have helped a little, or not. There were only 2 fizzles, and they were post-disruption, and no problems with runaways, so functionally the startup was adequate.

Session Leader Comments
Jun 21 2012 08:09:01:937AM	1120621001	Mike Churchill	Digitizer issues on fast diode crate. Joe Bosco changing out crate controller. Run will wait on him.
Jun 21 2012 08:22:00:723AM	1120621001	Mike Churchill	Joe Bosco has replaced the crate controller. Appears to be in working order.
Jun 21 2012 09:07:15:800AM	1120621001	Mike Churchill	Disruption @ 0.68s NEXT SHOT: Change Bt from 5.2T to 5.4T.
Jun 21 2012 09:29:37:143AM	1120621002	Mike Churchill	Good shot, nice H-mode (EDA? Can't find QCM) ICRF is being ramped during boronization recovery. Bt wasnt loaded, will next shot Beam timing changed to 50/25 NEXT SHOT: Repeat
Jun 21 2012 09:59:11:527AM	1120621003	Mike Churchill	Good shot, nice H-mode Bt wasnt loaded, something wrong with the loading routines DNB timing set, need to extend CXRS saturating on some channels on the LFS, may need to add attenuation fibers. Strange BV signal ~after RF comes on, very high and saturating. Enhancement NEXT SHOT: Repeat. ICRF will go into Plan 1 steps
Jun 21 2012 09:59:34:043AM	1120621004	Mike Churchill	Delays due to shot loading issues
Jun 21 2012 10:31:40:573AM	1120621004	Mike Churchill	Good shot, ICRF a little ratty on second phase. ICRF in Plan1 shape. Views on POL_BCK still saturating, put on attenuator fibers. NEXT SHOT: Repeat, with attenuator fibers on
Jun 21 2012 10:45:41:573AM	1120621004	Mike Churchill	Good shot, ICRF drops in 2nd 4MW phase ICRF in Plan1 shape. Views on POL_BCK C9,C10 saturating fix Elongation needs to increasse for edge Thomson. Try for kappa~1.62 NEXT SHOT: Repeat once more, with attenuator fibers on, and hopefully steady RF in the 4MW phase
Jun 21 2012 11:03:57:603AM	1120621006	Mike Churchill	Fizzle shots 1-5 on the IW poloidal periscopes see an increase in BV when the H-mode comes on, without an increase in Dalpha. Noticed upper triangularity is low (~0.28), may be creating a source of boron from the IW. NEXT SHOT: Repeat, Increase deltau to ~0.35
Jun 21 2012 11:42:01:163AM	1120621007	Mike Churchill	Good shot Elongation still low, increase to 1.62 Saturating on IW_POL_SIG, fix Strong BV increase on IW_POL periscopes still, though has reduced since changing the upper triangularity. NEXT SHOT: Repeat, increasing elongation. Shift first puff 100ms so that puff is away from the strong BV increase on the IW poloidal views
Jun 21 2012 11:36:40:470AM	1120621008	Mike Churchill	Loading routine issues, Wolfe and Josh are looking into it
Jun 21 2012 12:10:16:250PM	1120621008	Mike Churchill	Intermittent H-modes, ICRF faulting NEXT SHOT: Repeat, with gap sweep
Jun 21 2012 12:47:44:363PM	1120621010	Mike Churchill	Good shot CXRS looks good, IW_POL low but IW_SIG seems good. Move on. NEXT SHOT: Part1c, Ip=0.66, nl04=0.6 (skip Part1b)
Jun 21 2012 12:58:12:440PM	1120621011	Mike Churchill	Disruption @ 0.75s NEXT SHOT: Repeat
Jun 21 2012 01:31:25:743PM	1120621012	Mike Churchill	Disruption @ 0.93s NEXT SHOT: Push back RF (crossover problems?)
Jun 21 2012 08:46:57:393PM	1120621013	Mike Churchill	Good shot, ip=0.6, nl04=0.6 NEXT SHOT: Repeat, put RF back to 0.7
Jun 21 2012 01:49:28:277PM	1120621014	Mike Churchill	Good shot, Ip=0.6, nl04=0.6 NEXT SHOT: Part 2a, ELM-free, Ip=1.0, nl04=0.8
Jun 21 2012 02:08:33:540PM	1120621015	Mike Churchill	Disruption @ 0.42s NEXT SHOT: Repeat Part 2a, ELM-free, Ip=1.0, nl04=0.8
Jun 21 2012 02:48:41:313PM	1120621017	Mike Churchill	Good shot, 5 ELM-free phases. NEXT SHOT: Increase Ip=1.2MA, nl04=0.9
Jun 21 2012 03:04:31:543PM	1120621018	Mike Churchill	Good shot NEXT SHOT: Increase Ip=1.3MA, nl04=1.0. Drop RF power to 2.5MW
Jun 21 2012 03:20:52:020PM	1120621019	Mike Churchill	Good shot,Ip=1.3MA, nl04=1.0, RF=2.5MW NEXT SHOT: Locked mode, then JFT-2M
Jun 21 2012 03:38:04:007PM	1120621020	Mike Churchill	Locked mode, locks 0.86, disrupts 1.04 NEXT SHOT: Plan 3a, ELMY H-mode, reference 1101214029
Jun 21 2012 04:00:34:283PM	1120621021	Mike Churchill	Disruption @ 0.7s NEXT SHOT: Repeat, increase nl04, move the RF back to 0.7s, set to 2MW
Jun 21 2012 04:08:54:867PM	1120621022	Mike Churchill	Disruption @ 0.01s NEXT SHOT: Repeat Part3a
Jun 21 2012 04:35:16:870PM	1120621023	Mike Churchill	H-mode, but multiple iron injections. Not clear ELMs on the Halpha trace. NEXT SHOT: Increase nl04=0.6, move strike point out
Jun 21 2012 05:04:55:160PM	1120621025	Mike Churchill	Good shot, ELMs present, NINJA appears to kick it out of ELMy H-mode around 1.1s. NEXT SHOT: Raise RF power
Jun 21 2012 05:30:53:887PM	1120621027	Bob Mumgaard	Good. ~1mtorr Double it for next shot.
Jun 21 2012 05:32:19:657PM	1120621027	Steve Scott	loaded /home/sscott/pcs_scratch/1120621000 which is: 1120524002 but turn on pulse_gas4 for 300 ms (-0.40 to -0.10) and turn off pulse_gas3. we are aiming to get a torus pressure of about 1.5-2.0 mTorr. turned off the following trees: electrons, fueling, lh, particles, rf, spectroscopy, and transport, in an effort to shorten the shot cycle. result: good gas, good dnb. pressure = 0.9 mTorr
Jun 21 2012 05:33:01:780PM	1120621028	Steve Scott	This shot: double duration of gas puff to 600 ms, -0.7 --> -0.1
Jun 21 2012 05:36:56:800PM	1120621028	Steve Scott	This shot: double duration of gas puff to 600 ms, -0.7 --> -0.1. got about 1.8 mTorr maximum. good dnb.
Jun 21 2012 05:38:39:360PM	1120621028	Bob Mumgaard	Good beam. 2mtorr. Next one to to 0.5mTorr.
Jun 21 2012 05:37:25:470PM	1120621029	Steve Scott	go to half pressure, 150 ms pulse duration. also turn on spectroscopy tree
Jun 21 2012 05:45:22:597PM	1120621029	Bob Mumgaard	Good beam. Spect stored but didn't trigger properly. Retake.
Jun 21 2012 05:45:16:253PM	1120621030	Steve Scott	reload shot 29
Jun 21 2012 05:55:55:700PM	1120621030	Bob Mumgaard	Good beam. Good spect. Next, pressure to 0.7mTorr.
Jun 21 2012 05:51:14:470PM	1120621031	Steve Scott	set gas pulse duration=0.225
Jun 21 2012 06:00:29:440PM	1120621031	Bob Mumgaard	Good beam. Spect didn't trigger properly, repeat.
Jun 21 2012 06:01:02:860PM	1120621032	Steve Scott	reload 31 turn on all trees except rf and lh
Jun 21 2012 06:04:58:530PM	1120621032	Bob Mumgaard	Good beam. Spect triggered okay. Next up to 4mtorr.
Jun 21 2012 06:11:37:243PM	1120621033	Steve Scott	gas puff duration = 1200 ms. good ... 3.4 --> 2.0 mTorr. will use this for all three mse channels
Jun 21 2012 06:15:00:967PM	1120621033	Bob Mumgaard	Good beam. Spect triggered okay. About 3mTorr. Good data. Next: Change from looking at F02 to F09 looking through A5.
Jun 21 2012 06:18:10:620PM	1120621034	Steve Scott	no PCS changes. move MSE channel got good beam and gas and spectra. so next shot, move on to next mse channel
Jun 21 2012 06:21:07:440PM	1120621034	Bob Mumgaard	Good beam. Spect triggered okay. About 3mTorr. Good data. Next: Change from looking at F09 to F05 looking through A5.
Jun 21 2012 06:25:31:953PM	1120621035	Steve Scott	no PCS changes. new MSE channel. good dnb, good torus pressure (like 33 and 34)
Jun 21 2012 06:42:53:133PM	1120621035	Bob Mumgaard	Good beam. Spect triggered okay. About 3mTorr. Next: We take an ISC shot in position C to get a flat field, shot 503. I go in with Ken and we move the BES channels into the middle vertical row. They are now inline with F05. Lower the pressure and take a shot.
Jun 21 2012 06:42:38:970PM	1120621036	Steve Scott	load from shot 31. gas puff duration = 225 ms. start of BES shots. result: no DNB
Jun 21 2012 06:43:36:527PM	1120621036	Bob Mumgaard	No beam. Repeat.
Jun 21 2012 06:49:47:347PM	1120621037	Steve Scott	no PCS changes. dnb gate valve did not open. apparently it did not open on the previous shot, either. but dnb permissive is still ok
Jun 21 2012 07:06:41:370PM	1120621037	Bob Mumgaard	No beam. Gate vlave didn't open. Edgar is taking a test shot. If successful, Repeat. We took another ISC shot at position C for a flat field in this new configuration. Shot 504.
Jun 21 2012 07:14:47:290PM	1120621038	Steve Scott	No PCS changes. result: no HV on dnb. followed this with a dnb test shot, again no HV.
Jun 21 2012 07:28:26:100PM	1120621038	Bob Mumgaard	Scrubbing run to troubleshoot the DNB HV problems. Closing MSE shutter.
Jun 21 2012 07:26:38:717PM	1120621039	Steve Scott	no PCS changes. run scrubbed before shot ... we will try again on MOnday ----------------------------------------------------------

Physics Operator Comments
Jun 21 2012 09:28:05:887AM	1120621002	Jim Irby	changes -------------------------------- prefill from 18 to 16 ms to account, I hope, for disruption Otd results -------------------------------- plasma into rampdown
Jun 21 2012 09:58:51:193AM	1120621003	Jim Irby	changes -------------------------------- TF from 142.5 to 150 kA argon from 0.3 to 0.355 s Otd results -------------------------------- plasma into rampdown problem with PCS file --- did not reflect changes made in PCS
Jun 21 2012 10:22:50:210AM	1120621004	Jim Irby	changes -------------------------------- closed PCS and then started it again did shot 03 changes again (except for left gap) Otd Steve Wolfe sees the changes in the PCS files results -------------------------------- plasma into rampdown got proper Bt, clearin, argon
Jun 21 2012 10:40:45:833AM	1120621005	Jim Irby	changes -------------------------------- increase elongation --- *** increased ZXU when I should have decreased it! results -------------------------------- plasma into rampdown
Jun 21 2012 11:04:42:493AM	1120621006	Jim Irby	changes -------------------------------- ZXU now 0.03 m Otd results -------------------------------- fizzle
Jun 21 2012 11:11:18:210AM	1120621008	Jim Irby	changes -------------------------------- no dpcs changes results -------------------------------- plasma into rampdown --- elongation 1.55 still but triangularity 0.32 now
Jun 21 2012 12:13:02:910PM	1120621008	Jim Irby	changes -------------------------------- ZXU made flat at 0.03 m ZCUR to -0.015 from -0.020 m Otd results -------------------------------- PCS file update issue discovered again. Steve Wolfe and Josh working on the problem Steve Wolfe takes over PCS. My version is still running, but will not make any changes until we figure out the problem. plasma into rampdown RF still faulting/cleaning up Only a single DNB pulse elongation 1.6, upper triag 0.32
Jun 21 2012 12:36:13:523PM	1120621009	Steve Wolfe	For shot #9, program a radial position scan (both clearin and rcur) by 4mm starting at 0.9sec, scan out at 1.1sec, flat to 1.3sec, back by 1.5sec. clearin from -.0055 to -.0015 rcur from .657 to .661 also zcur from -.015 to -.012 to move sep at TS location. Result: plasma full length looks like it did about what was requested. Next: reduce pg4 in seg 1 from 18 to 16msec reduce pg1 in seg2 to 80% duty factor per mlr no changes for sl
Jun 21 2012 12:45:07:160PM	1120621010	Steve Wolfe	For shot #10 reduce pg4 in seg 1 from 18 to 16msec reduce pg1 in seg2 to 80% duty factor per mlr no other changes for sl Load at 21-Jun-2012 12:36:08.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma full length startup is still moving in and hesitating, burnout maybe a little better Next: get rid of back porch on pg3 in seg1 Goto 600kA, 0.6nl04
Jun 21 2012 01:11:35:650PM	1120621011	Steve Wolfe	shot #11: get rid of back porch on pg3 in seg1 Goto 600kA, 0.6nl04 Reduce argon to 50% Load at 21-Jun-2012 12:49:25.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma disrupts at .75 sec, during oh1 crossover Got a crowbar on oh1, supply may have caused the disruption? Disruption did come first, self-powered circuit fired. Just a brick I think. startup was bouncy, but survived. Next: try increasing ef4 from -1320 to -1310
Jun 21 2012 01:27:13:580PM	1120621012	Steve Wolfe	shot #12: try increasing ef4 from -1320 to -1310 Still trying for 600kA case: get rid of back porch on pg3 in seg1 Goto 600kA, 0.6nl04 Reduce argon to 50% Load at 21-Jun-2012 13:04:21.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: another disruption at 0.93, in trouble from 0.7sec Could be a problem during crossover, losing gap control. I can turn on the oh1_crossover procedure, and delay the RF to 0.8sec
Jun 21 2012 01:36:54:753PM	1120621013	Steve Wolfe	shot #13: turn on the oh1_crossover procedure, and delay the RF to 0.8sec leave ef4 at -1310 Still trying for 600kA case: get rid of back porch on pg3 in seg1 Goto 600kA, 0.6nl04 Reduce argon to 50% Load at 21-Jun-2012 13:27:22.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma full length crossover routine worked, crossover lasts from .625 to .65sec Startup still looks ugly. Next: repeat with RF on at 0.7sec Argon back up to 70%
Jun 21 2012 01:51:12:277PM	1120621014	Steve Wolfe	Shot#14: repeat with RF on at 0.7sec Argon back up to 70% No startup changes Load at 21-Jun-2012 13:37:54.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma full length startup still moving in from 12 to 15msec Moving on to 1MA, 0.8nl04 (part 2a)
Jun 21 2012 02:11:38:937PM	1120621015	Steve Wolfe	Shot#15:Moving on to 1MA, 0.8nl04 (part 2a) Decrease pg4 from 16 to 15msec in seg1 Turn off pg3 after 0.0 in seg1 Load at 21-Jun-2012 13:55:32.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: Disrupts at 0.4 sec, just after crossover! maybe I should have turned off the crossover routine. OH1 crowbarred again. Injection happens at .37, never sawtooths, could be a locked mode. nl04 is only 0.6, no gas puffing in seg2 (or small). Need to raise nl04 faster
Jun 21 2012 02:29:05:043PM	1120621016	Steve Wolfe	Shot#16:Moving on to 1MA, 0.8nl04 (part 2a) Raise nl04 faster, increase nl04 P gain from 3 to 6 Turn off crossover routine Load at 21-Jun-2012 14:13:53.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma full length. Got elm-free H-modes early in rf pulse, but may turn into EDA later. Next: repeat?
Jun 21 2012 02:41:14:370PM	1120621017	Steve Wolfe	Shot#17: Increase current to 1.1MA Load at 21-Jun-2012 14:31:52.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma full length, more h-modes (5), last one may be bad eda Startup still hesitating Next: raise ef4 from -1310 to -1300 change current?
Jun 21 2012 03:01:30:323PM	1120621018	Steve Wolfe	Shot#18: raise ef4 in seg1 from -1310 to -1300 change current to 1.2MA, nl04 to 0.9e20 Load at 21-Jun-2012 14:45:06.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done plasma full length, multiple h-modes, elm-free, as requested some bounciness in startup, I'm hesitant to do any more about it; next step might be ef3_volt tweak. Next: 1.3MA, nl04=1.0e20
Jun 21 2012 03:16:07:910PM	1120621019	Steve Wolfe	Shot#19: 1.3MA, nl04=1.0e20 No startup changes Load at 21-Jun-2012 15:02:33.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma full length, multiple H-modes Similar startup Next: locked mode shot
Jun 21 2012 03:33:48:720PM	1120621020	Steve Wolfe	Shot#20: locked mode shot import seg3 from 1120620017 seg3 Seg2 off, seg3 on Load at 21-Jun-2012 15:18:56.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: disruption at 1.03sec NExt: go to jft2m shape (1101214029, seg2 into seg4)
Jun 21 2012 03:58:04:173PM	1120621021	Steve Wolfe	Shot#21: go to jft2m shape import 1101214029, seg2 into seg4 and recalc mag predictors Turn off seg3 turn on seg4 Request f.d. off time to 1.8sec (was 2.3) Load at 21-Jun-2012 15:45:36.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: plasma disrupts at 0.9sec, injection at .65sec Next: Delay rf as on reference shot, Increase density to 6e19 early, drop back to 4e19 before rf
Jun 21 2012 04:09:05:413PM	1120621022	Steve Wolfe	Shot#22: Delay rf as on reference shot, Increase density to 6e19 early, drop back to 4e19 at 0.5sec, before rf Also remove programmed H-bot puff (not enabled anyway) Load at 21-Jun-2012 16:00:16.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done fizzle, post-disruption; also, there was a leak after the last shot CII is up at breakdown (in fact it was invisible all day until this shot) Next: try that again
Jun 21 2012 04:28:39:183PM	1120621023	Steve Wolfe	Shot#23: Increase density a little faster in seg2 to 6e19 Delay rf as on reference shot, Increase density to 6e19 early, drop back to 4e19 at 0.5sec, before rf Load at 21-Jun-2012 16:11:12.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done plasma full length breakdown better. very ratty looking intermittant H-modes, possible elming but not great Next: Move RXL out by 1cm
Jun 21 2012 04:46:24:990PM	1120621024	Steve Wolfe	Shot#24:Move RXL out from -.045 to -.035 Raise nl04 from 4 to 6e19 in target, which it already almost was getting anyway Load at 21-Jun-2012 16:31:47.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Result: disrupts at 0.67sec, before RF. Looks like another injection. Density was 7.7e19 before the injection, no sign of a problem before the injection, then it just goes. Matt says Fe again. Next: Move rxl back where it was
Jun 21 2012 04:59:33:480PM	1120621025	Steve Wolfe	Shot#25: Move rxl back where it was (-.045) Load at 21-Jun-2012 16:47:42.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done plasma full length, some ELMs Apparently the NINJA kills off the ELMs Next: same pcs program, raise RF power later in shot
Jun 21 2012 05:07:36:577PM	1120621026	Steve Wolfe	Shot#26: same pcs program, raise RF power later in shot Result: plasma full length, ELMs through maybe 1.1sec End of Run

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:59:28:840AM	Plasma	Ok
2	09:13:01:383AM	Plasma	Ok
3	09:28:37:763AM	Plasma	Ok
4	10:13:12:463AM	Plasma	Ok
5	10:32:12:700AM	Plasma	Ok
6	10:48:10:777AM	Plasma	Ok
7	11:03:29:080AM	Plasma	Ok
8	11:52:28:940AM	Plasma	Ok
9	12:22:28:003PM	Plasma	Ok
10	12:37:45:733PM	Plasma	Ok
11	12:52:37:350PM	Plasma	Ok
12	01:13:51:310PM	Plasma	Ok
13	01:29:14:380PM	Plasma	Ok
14	01:44:20:197PM	Plasma	Ok
15	02:01:28:413PM	Plasma	Ok	OH1 self powered circuit fired
16	02:19:36:880PM	Plasma	Ok
17	02:34:44:107PM	Plasma	Ok
18	02:51:07:320PM	Plasma	Ok
19	03:09:22:810PM	Plasma	Ok
20	03:29:04:183PM	Plasma	Ok
21	03:46:47:413PM	Plasma	Ok
22	04:04:09:783PM	Plasma	Ok
23	04:17:32:980PM	Plasma	Ok
24	04:34:48:933PM	Plasma	Ok
25	04:49:39:600PM	Plasma	Ok
26	05:03:40:343PM	Plasma	Ok
27	05:26:39:693PM	Test	Ok
28	05:33:52:157PM	Test	Ok
29	05:39:54:133PM	Test	Ok
30	05:46:09:907PM	Test	Ok
31	05:53:26:690PM	Test	Ok
32	06:01:03:820PM	Test	Ok
33	06:07:53:947PM	Test	Ok
34	06:14:39:203PM	Test	Ok
35	06:22:07:807PM	Test	Ok
36	06:39:28:417PM	Test	Ok
37	06:46:12:190PM	Test	Ok
38	07:08:04:780PM	Test	Ok

System Availability

Jun 21 2012 08:59:12:760AM

System Available Comment Availability Changed Owner Description Who Can Change Active MHD no secured - tagged out Jun 2 2008 11:03:58:433AM (sears) Joe Snipes Active MHD Antenna golfit BES yes BES system is online Nov 22 2011 02:21:12:050PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes Midplane diodes functioning properly. Midplane bolometers working and calibrated. DIV bolometers installed but not yet toaster calibrated Apr 20 2012 09:57:29:520AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization yes   Jun 15 2012 05:02:46:313PM (dekow) Jim Irby Boronization dekow,irby CECE no   Jan 6 2012 03:48:47:060PM  Anne White Correlation ECE whitea CNPA yes Multiple channel CNPA available, no safety risk for in-vessel access Apr 14 2011 12:01:59:693PM (parker) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor yes   Jun 15 2012 05:02:31:550PM (dekow) Brian LaBombard Upper Divertor Cryopump dekow,irby,labombard CXRS yes core-CXRS system is online Nov 22 2011 02:21:22:280PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan CXRS edge yes Michael CHurchill has primary responsibility at the moment Apr 19 2011 11:44:46:247AM (blip) Bruce Lipshultz Measurement of CXR light in the pedestal region at both the high- and low-field sides blip,rmchurch D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 1 2009 09:45:41:090AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe Dalsa no system is is installed and aligned, but not functional (appears to be a broken cable) Dec 5 2011 02:41:42:867PM (marmar) Earl Marmar Visible Bremsstrahlung Imaging marmar Disruption Mitigation yes two gas jet valves active as of Feb 2012 May 15 2012 10:09:23:597AM (granetz) Robert Granetz Gas Jet granetz,whyte Divertor IR no   Mar 6 2007 10:50:41:677AM  Glen Wurden Divertor IR Digital Video gwurden,terry Divertor IR Spectroscopy no   Mar 6 2007 10:51:39:897AM  Glen Wurden Divertor IR Spectroscopy gwurden,terry DMBolo AXUV diodes yes Diodes are taking usable data. Not all post-processing code is working yet. Feb 1 2012 01:24:23:953PM (golynyk) Geoff Olynyk Set of six AXUV diodes in a toroidal array of midplane wall boxes. golynyk,granetz,mlreinke,whyte DNB yes "The beam could break at any moment." May 15 2012 10:09:52:470AM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,mochung ECDC yes   Apr 26 2012 03:23:19:057PM (dekow) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE yes FRC-ECE is online May 14 2012 11:53:01:693AM (bespam) Perry Phillips Heterodyne ECE-32 channels bespam,liao,phillips,rowan,whitea FTCI yes System Operational May 14 2012 11:50:45:590AM (irby) Jim Irby Fast two-color interferometer irby G-Side Ratiomatic yes Installed April 25,2012. New controller installed 5/29/2012 Jun 7 2012 10:40:00:957AM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no HV cables disconnected and power supplies off. Electrical plugs have been disconnected, capped and red tagged. Mar 5 2012 10:21:53:460AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby GPC yes Operational Apr 27 2012 07:41:46:907AM (hubbard) Amanda Hubbard ECE Polychromater hubbard GPC2 yes Operational Apr 27 2012 07:42:03:317AM (hubbard) Amanda Hubbard ECE Polychromater hubbard GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 1 2009 09:45:50:933AM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes system is functional and taking data Dec 5 2011 02:42:29:857PM (marmar) Earl Marmar H/D Ratio marmar HEAT yes   Apr 26 2012 03:23:49:607PM (dekow) Gary Dekow - Machine Heaters - burke,dekow Hirex Jr yes Hirex-Jr has been installed Jun 28 2010 03:36:33:420PM (rice) John Rice High Resolution X-Ray ince,rice Hirex Sr yes Installed and aligned. Will be available for Ti/Vr profiles after focusing tests and locked modes are taken. Dec 6 2011 08:21:02:453AM (ypodpaly) John Rice High Resolution X-Ray cgao,ldelgado,rice,ypodpaly HXR yes 32 Channels operational,, no safety risk for in-vessel access Apr 14 2011 12:05:24:810PM (parker) Ron Parker Hard X-Ray Array faust,parker,schmidt ICRF D-Antenna yes   May 31 2012 09:20:06:827AM (wukitch) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna yes   May 31 2012 09:19:57:640AM (wukitch) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna yes   May 31 2012 09:19:47:443AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin Impurity Spectroscopy yes Being upgraded with better optics and new spectrographs. Dan Miller has primary responsibility. Apr 19 2011 11:46:02:193AM (blip) Bruce Lipshultz Measurement of recycling light and impurity source rates at multiple surfaces around the tokamak blip,miller Laser Blow-Off yes Pumped Down, Laser has not yet been tested but otherwise operational May 14 2012 04:31:17:037PM (nthoward) Martin Greenwald Impurity Injection System g,nthoward Lower Hybrid no LH is now safe for manned entry into machine. Positioner locked and tagged off. Switches locked in dummy load position. Mar 2 2012 02:34:28:943PM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg Lower Hybrid Reflectometer no off Apr 15 2011 08:24:27:930AM (dominguez) Arturo Dominguez Lower Hybrid Reflectometer dominguez,marmar,parker,sgbaek LoWEUS yes LoWEUS viewing the 10-30 nm region, spectral brightness vs. lambda and time are being stored in tree. Apr 20 2012 10:43:34:077AM (mlreinke) Matthew L. Reinke Long Wavelength Extreme Ultraviolet Spectrometer markchil,mlreinke LPI no Beam line removed May 30 2008 02:09:12:833PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha yes Midplane Lyman-a. New B-PORT Lyman (BPLY) still being debugged. Apr 20 2012 10:44:00:540AM (mlreinke) Matt Reinke Lyman alpha cameras faustian,labombard,mlreinke Magnetics yes   Dec 1 2011 11:51:51:970AM (g) Robert Granetz Bp coils and flux loops for equilibrium control granetz,wolfe McPherson no McPherson viewing the 10-14 nm region for molybdenum monitoring. It's days are numbered as LoWEUS has demonstrated superiority. Apr 20 2012 10:44:10:937AM (mlreinke) Jim Terry VUV Spectrometer markchil,mlreinke,terry Michelson yes Vacuum 3-4e-8 T. Starting with Michelson at reduced speed. Apr 27 2012 07:42:41:960AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes   Dec 2 2011 12:27:47:163PM (toland) Brian LaBombard Baratron pressure gauges labombard,toland MLP yes Operational. Connected to A-port probe system May 10 2012 08:40:19:910AM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard MSE yes 2/29/2012 MSE operational. No HV or vacuum safety issues Feb 29 2012 12:26:13:863PM (sscott) Steve Scott Motional Stark Effect jinseok,sscott Neutrons yes Voltage is on for He3 detectors on J port. Remaining voltages will be turned on for the first run. Apr 23 2012 09:31:22:063AM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes All detectors Powered On --- Waiting for neutrons for calibration Nov 22 2011 01:05:24:380PM (irby) Jim Irby X-Ray/Neutron Detectors at K-Hor irby NINJA yes C-bottom and new F-bottom system ready. Dec 2 2011 12:28:44:843PM (toland) Brian LaBombard NINJA gas puff labombard,terry,toland PCI yes Operational. May 1 2012 08:31:33:743AM (ntsujii) Miklos Porkolab Phase Contrast Imaging emd,ennever,ntsujii,porkolab Penning Gauges yes HV power supplies turned ON in INIT, off in RECOOL May 10 2012 08:41:03:000AM (labombard) Brian LaBombard Penning Ionization Gauges labombard Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Jul 1 2009 09:46:29:543AM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe Polarimeter yes 3 chords operational but with high noise level Jan 6 2012 04:22:20:903PM (irby) Jim Irby C-Mod Polarimeter irby Power - Alternator Air Switch yes   Apr 26 2012 03:24:21:607PM (dekow) Gary Dekow Alternator to Power Room Power Supply Connection cochran,dekow,dterry,irby Power - PEI yes   Apr 26 2012 03:24:41:250PM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX yes   Apr 26 2012 03:24:57:153PM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems yes   Apr 26 2012 03:25:14:497PM (dekow) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby Probe Array - ISD yes Operational. Some dead probes. May 10 2012 08:41:58:120AM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH yes Operational. 4 out of 6 probes working. May 10 2012 08:41:40:557AM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes Operational. May 10 2012 08:42:13:733AM (labombard) Brian LaBombard Outer Lower Divertor Probe Array (F and J) labombard Probe Array - UDIV yes Operational. Some dead probes. May 10 2012 08:42:32:663AM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes On 1120608, the high frequency channels: 112, 140 and the variable, have been disconnected for some troubleshooting. All other channels are connected Jun 14 2012 11:28:59:603AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Operational. A variety of probe heads are ready for use. May 10 2012 08:43:10:937AM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Operational. May 10 2012 08:43:24:887AM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP no Not functioning. Probe tips are melted. Repair not performed during break. May 10 2012 08:44:43:137AM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick Shoelace Antenna yes Operational May 10 2012 08:45:08:320AM (labombard) Brian LaBombard High-k active MHD antenna, for QCM, WCM studies golfit,labombard SOL reflectometer yes c-port (top, middle, bottom) and h-port available. Only 1 of 4 locations can be used for each discharge May 1 2012 04:54:58:820PM (cornwall) Cornwall Lau SOL reflectometer cornwall,wukitch,ylin Sparker yes Sparker Power Supply powered up. Connected at K port using red cable 4/23/12 9:25AM Apr 23 2012 12:06:10:983PM (parkin) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin Surface Science Station no SSS is up to air, no safety issues. Feb 27 2012 01:51:48:783PM (ochoukov) Bruce Lipschultz Radially scanning probe located on K-port blip,ochoukov TCI yes TCI lasers in operation May 14 2012 11:51:18:700AM (irby) Jim Irby Two-Color Interferometer irby,murray TS - Core yes Operating with one 50Hz laser, precise density calibration still required. May 9 2012 03:12:32:050PM (jwhughes) Jerry Hughes Core Thomson scattering jrwalk,jwhughes,yma TS - Edge yes Operating with one 50Hz laser, precise density calibration still required. May 9 2012 03:12:51:363PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jrwalk,jwhughes,yma Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58:35:493AM (agraf) Alex Graf Visible Spectrometer agraf XEUS yes XEUS viewing the 1-6 nm region, spectral brightness vs. lambda and time are being stored in tree. Apr 20 2012 10:43:43:107AM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer markchil,mlreinke XTOMO yes ARRAY1->5 available. Specific channels on various arrays display issues. Apr 20 2012 05:36:28:523PM (faustian) Robert Granetz X-Ray Tomography faustian,granetz,mlreinke