Miniproposals

Miniproposal: 296 Date Filed: 5/14/2001 Title: Confirmation of Thomson scattering density calibration using electron cyclotron emission cutoffs First Author: Jerry Hughes Session Leader: Yunxing Ma (shots 33-33)

Miniproposal: 671 Date Filed: 1/4/2012 Title: Investigation of dilution effects on turbulence and transport in low density ohmic plasmas First Author: Paul Ennever Session Leader: Paul Ennever (shots 1-32)

Engineering Operator Run Comment

MP671 SL Paul Ennever PO Syunichi Shiraiwa

Session Leader Plans

Entered: Feb 9 2012 03:19:33:517PM

Author: Paul Ennever

MP671 "Investigation of dilution effects on turbulence and transport in low density ohmic plasmas" The purpose of this run is to investigate the result that diluting the main ion species of the plasma with some lower Z ions results in reduced ion transport without having significant effects on electron transport. This will be done by measuring the impurity content of unseeded plasmas with the newly calibrated impurity diagnostics (based on MP 687) and then seeding the plasmas with Nitrogen in order to dilute the main ions by at least 15-20% (the level at which we see the effects on transport). Locked mode shots will be taken to calibrate HIREX-SR. Ohmic Scan based on: Run 1070713XXX (5.4T, 800 kA, though I won't have as large a density scan) N2 Puffs based on: Shots 1120203027-031 (will have to reduce amount because of lower density) He ECDC the night before. All Shots ========== Working Gas = D2 B = 5.4 T Ip = 800 kA NINJA: 8 PSI He^4 puff @ 1.4s (for GPI) H-Bot: 1 psi Ar puff @ 0.4s for 75 ms @ 100 V (for HIREX) B-Lower: 15 psi N2, voltages and duration to change with shots Equilibrium based on: Shot 1100226015 (Upper null) Cryopump ON DNB Detailed Sequence ================== a) Unseeded Ohmic Density Scan Shot 1: Unseeded nl04=0.4 nl04 = 0.4 x 10^20 m^-2 Based on 1070713011 (with USN equilibrium instead) Shot 2: Unseeded nl04=0.3 nl04 = 0.3 x 10^20 m^-2 Based on 1070713013 (with USN equilibrium instead) Shot 3: HIREX-SR Locked Mode Calibration Shot Based on most recent successful shot: 1120207012 (change to H-bot seeding) Shot 4: Unseeded nl04=0.2 nl04 = 0.2 x 10^20 m^-2 Based on 1070713016 (with USN equilibrium instead) Shot 5: Unseeded nl04=0.6 nl04 = 0.6 x 10^20 m^-2 Based on 1070713009 (with USN equilibrium instead) Shot 6: Unseeded nl04=0.8 nl04 = 0.8 x 10^20 m^-2 Based on 1070713021 (with USN equilibrium instead) Optional: Unseeded nl04=1.0 nl04 = 1.0 x 10^20 m^-2 b) Seeded Ohmic Density Scan Shot 7: Seeded nl04=0.4 nl04 = 0.4 x 10^20 m^-2 Start at 50V on PG1 from 0.7s - 1.3s and adjust from there Try to get 2-3 good shots covering the range of deltaZeff = [0.5-2] (corresponding to dilution of ~ 8% - 32%) Shot 8: Seeded nl04=0.6 nl04 = 0.6 x 10^20 m^-2 Start from highest deltaZeff PG voltage of shot 7 and adjust from there Try to get 2-3 good shots covering the range of deltaZeff = [0.5-2] (corresponding to dilution of ~ 8% - 32%) Shot 9: Seeded nl04=0.8 nl04 = 0.8 x 10^20 m^-2 Start from highest deltaZeff PG voltage of shot 8 and adjust from there Try to get 2-3 good shots covering the range of deltaZeff = [0.5-2] (corresponding to dilution of ~ 8% - 32%) Shot 10: HIREX-SR Locked Mode Calibration Shot Based on most recent successful shot: 1120207012 Shot 11: Seeded nl04=0.3 nl04 = 0.3 x 10^20 m^-2 Start from lowest deltaZeff PG voltage of shot 7 and adjust from there Try to get 2-3 good shots covering the range of deltaZeff = [0.5-2] (corresponding to dilution of ~ 8% - 32%) Shot 12: Seeded nl04=0.2 nl04 = 0.2 x 10^20 m^-2 Start from lowest deltaZeff PG voltage of shot 10 and adjust from there Try to get 2-3 good shots covering the range of deltaZeff = [0.5-2] (corresponding to dilution of ~ 8% - 32%) c) Contingencies Thomson ECE cutoff shots to be done if necessary as first priority for extra shots. If time permits, seed into nl04 = 1.0 case based on shot 9. If pressed for time, Zeff scan in shot 11 and 12 can be done with fewer points.

Physics Operators Plans

Entered: Feb 9 2012 05:51:58:227PM

Author: Syunichi Shiraiwa

----------------- Engineering Setup ----------------- Run begins at 09:00 and ends at 17:00 Power systems as on: 1120208015 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 15 psi N2 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 8 psi He4 enabled fill H-Bot 1 psi Ar enabled (PG5) Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus Leave z-bolo shutter as is (should be open) Torvac gatevalve toggle (yes/no): no Boronization(yes/no): no Overnight ECDC (yes/no): yes ICRF(yes/no): no LH(yes/no): no Cryopump (yes/no): yes DNB (yes/no): yes Vessel temperature: 35/35/35 ------------------------------ ECDC Parameters (if requested) ------------------------------ gas and pressure: He at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s ------------------------------ PCS preparation ------------------------------ 1120208015 (0.6MA, 5.4T, USN, CRYO-startup) Set PG5 (H-bot) at 100V from 0.4s for 75 ms. Change ZCUR, RCUR, CLEARIN, RXU, ZXU, NE04, IP in seg 3 to match seg 2 of 1100226015 File saved as ~shiraiwa/pcs/1120210001

Session Leader Summaries

Entered: Feb 10 2012 06:39:51:113PM

Author: Paul Ennever

MP671 "Investigation of dilution effects on turbulence and transport in low density ohmic plasmas" The original purpose of this run was to do an ohimc density scan and seed low-Z impurities (in this case Nitrogen) to study the effects of dilution. We managed to get a density scan from nl04=0.25-0.8 x 10^20 m^-2 in the unseeded plasmas (thought the lower bound had lots of runaways) and scanned from 0.35-0.75 x 10^20 m^-2 in the seeded case. At the highest densities in both seeded and unseeded we encountered what appeared to be MARFs and poloidal detachment, which caused the plasma to cool and often disrupt. We also had many post-disruption fizzles, so that limited the number of shots we could use over all, and we lost a couple of shots at the end due to camac issues. We also needed a Thomson ECE cutoff calibration shot to correct the Thomson density profiles. Over all this was a successful run day and we managed to get enough points in density and Zeff space to do gyrokinetic modeling. Shot List: 11202100XX sec 10^20 m^-2 V keV 100-500 kHz Shot | Time Window | nl04 | PG1 | Te0 | PCI Avg | Zave/Zneo | ================================================================================ 01 | Gas Test | | | | | | -------------------------------------------------------------------------------- 02 | [0.6,1.6] | 0.36 | 0 | 2.4 | N/A | 3.6/2.2 | *pci shutter wasn't opening -------------------------------------------------------------------------------- 03 | [0.6,1.6] | 0.4 | 0 | 2.4 | 1.1-1.3 | 4.0/2.5 |*good shot* -------------------------------------------------------------------------------- 04 | Locked Mode Calibration | | | | | -------------------------------------------------------------------------------- 05 | P.D. Fizzle | | | | | | -------------------------------------------------------------------------------- 06 | P.D. Fizzle | | | | | | -------------------------------------------------------------------------------- 07 | [0.6,1.6] | 0.3-0.34 | 0 |2.5-2.8| 0.9-1.1 | 5.0/2.8 |*good shot, Mo injection at 0.94* -------------------------------------------------------------------------------- 08 | [0.6,1.6] | 0.28-0.22| 0 |2.8-3.2| 0.75-0.6 | 6.4/3.7 |*good shot but lots of runaways* -------------------------------------------------------------------------------- 09 | P.D. Fizzle | | | | | | -------------------------------------------------------------------------------- 10 | [0.6,1.6] | 0.25 | 0 |3.0-3.3| 0.65-0.8 | 6.6/3.8 |*good shot but lots of runaways* -------------------------------------------------------------------------------- 11 | [0.6,1.6] | 0.58 | 0 |2.0-1.8| 2.7 | 3.0/1.7 |*good shot* -------------------------------------------------------------------------------- 12 | [0.6,1.3] | 0.72 | 0 | 1.6 | 5.5 | 2.4/1.4 |*good shot* -------------------------------------------------------------------------------- 13 | [0.9,1.3] | 0.48 | 50 | 2.3 | 1.4 | 4.9/2.4 |*good shot* -------------------------------------------------------------------------------- 14 | [0.9,1.3] | 0.46 | 50 | 2.5 | 1.5 | 5.2/? |*no Thomson* -------------------------------------------------------------------------------- 15 | [0.92,1.31] | 0.42 | 50 | 2.6 | 1.5-1.8 | 5.7/3 |*good shot* -------------------------------------------------------------------------------- 16 | Disrupted at 0.9s, no Nitrogen flattop | | | -------------------------------------------------------------------------------- 17 | P.D. Fizzle | | | | | | -------------------------------------------------------------------------------- 18 | Locked at 0.95s, no Nitrogen flattop | | | -------------------------------------------------------------------------------- 19 | Detached at 1.0s then disrupted| | | | -------------------------------------------------------------------------------- 20 | [0.8,1.25] | 0.56 | 25 | 2.0 | 3.1 | 3.1/? |*no Hirex* -------------------------------------------------------------------------------- 21 | [0.92,1.3] | 0.60 | 35 | 1.9 | 4.0 | 3.6/2.2 |*good shot* -------------------------------------------------------------------------------- 22 | [0.96,1.09] | 0.58 | 45 | 2.1 | 3.8 | 4.2/? |*good shot* -------------------------------------------------------------------------------- 23 | P.D. Fizzle | | | | | | -------------------------------------------------------------------------------- 24 Detaches/marfs at 0.62s before Nitrogen is even puffed and disrupts at 0.95s -------------------------------------------------------------------------------- 25 | P.D. Fizzle | | | | | | -------------------------------------------------------------------------------- 26 | Detaches/marfs at 0.8s | | | | | -------------------------------------------------------------------------------- 27 | Fizzle | | | | | | -------------------------------------------------------------------------------- 28 | Detaches/marfs at 0.72s | | | | | -------------------------------------------------------------------------------- 29 | [0.85,1.15] | 0.76 | 0 | 1.5 | 10 | 2.0/? |*good shot* -------------------------------------------------------------------------------- 30 | Fizzle | | | | | | -------------------------------------------------------------------------------- 31 | [0.96,1.3] | 0.42 | 50 | 2.5 | 1.5 | 5.3/? |*good shot* -------------------------------------------------------------------------------- 32 | [0.9,1.28] | 0.43 | 50 | 2.6 | 1.5 | 4.9/2.8 |*good shot* -------------------------------------------------------------------------------- 33 | Thomson ECE cutoff calibration | | | | --------------------------------------------------------------------------------

Physics Operator Summaries

Entered: Feb 10 2012 05:34:16:627PM

Author: Syunichi Shiraiwa

MP671 "Investigation of dilution effects on turbulence and transport in low density ohmic plasmas MPXXX "Thomson ECE cross-calibration" PO S. Shiraiwa SL P. Ennever The machine works very well today. Other than the computer problem developed around 4:30pm, we did not experience power supply, leak, nor gas valve issues.. We made 32 attempt to make plasma, and obtained 24 successful discharges. We finished from "shot 1" to "shot 11" listed in SL plan. At the very low density case (0.2e20), we obtained significant run-away electrons, so that we skipped these "shot". We got 8 fizzles, all of them happened after disruptions or due to high radiation in the previous shot. The following is the score card of today.

Session Leader Comments
Feb 10 2012 08:49:23:433AM	1120210001	Paul Ennever	Gas Test Only Next: Move on to shot 1 of SL_PLAN: Unseeded nl04=0.4
Feb 10 2012 09:20:59:813AM	1120210002	Paul Ennever	Result: nl04=.36 Good shot, but PCI shutter is not opening. That was probably why there was no calibration data for shot 1. I'm going to just leave it open for now (hopefully it will open manually). Shutter seems to be working. Next: Repeat
Feb 10 2012 09:35:24:263AM	1120210003	Paul Ennever	Result: nl04=0.39 Zave=4.0 Zneo=2.5 Good baseline nl04=0.4 shot Next: Move on to locked mode shot (shot 3 from run plan)
Feb 10 2012 09:43:53:447AM	1120210004	Paul Ennever	Result: Locked mode shot, disrupted at 1.5 Thumbs up from Matt, so move on with density scan Next: nl04=0.3 (shot 2 from run plan)
Feb 10 2012 10:04:52:110AM	1120210005	Paul Ennever	Result: Fizzle Next: Try again
Feb 10 2012 10:05:30:850AM	1120210006	Paul Ennever	Result: Fizzle Next: Try again
Feb 10 2012 10:30:17:843AM	1120210007	Paul Ennever	Result: nl04=0.3-0.34 Zave=5.0 Zneo=2.8 Cell access for magnetics Next: nl04=0.2
Feb 10 2012 10:46:18:127AM	1120210008	Paul Ennever	Result: nl04=0.6 Zave=6.4 Zneo=3.7 Lots of runaways, so try increasing density a little to 0.25 Next: nl04=0.25
Feb 10 2012 10:49:10:430AM	1120210009	Paul Ennever	Result: Fizzle Next: try nl04=0.25 again
Feb 10 2012 11:09:22:990AM	1120210009	Paul Ennever	Result: nl04=0.25 Zave=6.5 Zneo=3.6 Next: go to nl04=0.6 (shot 5 from run plan)
Feb 10 2012 11:20:23:490AM	1120210011	Paul Ennever	Result: nl04=0.58 Zave=3.3-2.6 Zneo=1.7 Next: Move on to nl04=0.8 (Shot 6 from run plan)
Feb 10 2012 11:36:24:947AM	1120210012	Paul Ennever	Result: nl04=0.72 Zave=2.4 Zneo=1.4 Next: Seed N2 into nl04=0.4, starting with 50V from 0.7-1.3 (Shot 7 from run plan)
Feb 10 2012 12:06:11:263PM	1120210013	Paul Ennever	Result: nl04=0.45-5.0 Zave=4.0-4.9 delta_Zave=0.9 Zneo=2.4-2.9 delta_Zneo=0.5 Next: Repeat at slightly lower density
Feb 10 2012 12:09:24:650PM	1120210014	Paul Ennever	Result: nl04=0.4-0.46 Zave=4.2-5.2 delta_Zave=1.0 Zneo=not available? delta_Zneo=? Thomson didn't fire, repeat at slightly lower density Next: Repeat at slightly lower density
Feb 10 2012 12:22:40:720PM	1120210015	Paul Ennever	Result: nl04=0.37-.42 Zave=4.5-5.7 delta_Zave=1.2 Zneo=2.5-3.5 delta_Zneo=1.0 No spectroscopy for this shot Next: Repeat with PG1 at 100V
Feb 10 2012 12:37:03:370PM	1120210016	Paul Ennever	Result: nl04=0.36-0.46 Zave=4.4-6.4 delta_Zave=2.0 Zneo=n/a delta_Zneo=n/a disrupted at 0.9s Next: Repeat with PG1 at 80V
Feb 10 2012 12:39:04:897PM	1120210017	Paul Ennever	Result: nl04=n/a Zave=n/a delta_Zave=2.0 Zneo=n/a delta_Zneo=n/a Fizzle Next: Repeat
Feb 10 2012 01:00:10:373PM	1120210018	Paul Ennever	Result: nl04=0.32-0.41 Zave=4.4-6.4 delta_Zave=2 Zneo=n/a delta_Zneo=n/a locked at 0.95s, disrupted at 1.1s Next: Move on to nl04=0.6, change PG1 to 50V (shot 8 of run plan)
Feb 10 2012 01:20:06:993PM	1120210019	Paul Ennever	Result: nl04=0.5-0.57 Zave=3.2-4.4 delta_Zave=1.2 Zneo=n/a delta_Zneo=n/a disrupted at 1.0 Next: Change PG1 to 25V
Feb 10 2012 01:30:49:450PM	1120210020	Paul Ennever	Result: nl04=0.56 Zave=3.0 delta_Zave=0 Zneo=n/a delta_Zneo=n/a No HIREX, very little N2, repeat at 35V Next: Change PG1 to 35V
Feb 10 2012 01:43:15:120PM	1120210021	Paul Ennever	Result: nl04=0.58-.6 Zave=3.2-3.6 delta_Zave=0.4 Zneo=1.9-2.2 delta_Zneo=0.3 Next: Change PG1 to 45V
Feb 10 2012 01:58:36:390PM	1120210022	Paul Ennever	Result: nl04=.58-.60 Zave=3.2-4.3 delta_Zave=1.1 Zneo=n/a delta_Zneo=n/a Next: Change to nl04=0.8 set PG1=35V (Shot 9 from run plan)
Feb 10 2012 02:01:35:223PM	1120210023	Paul Ennever	Result: nl04=n/a Zave=n/a delta_Zave=n/a Zneo=n/a delta_Zneo=n/a Fizzle Next: Repeat
Feb 10 2012 02:39:34:400PM	1120210024	Paul Ennever	Result: nl04=0.82-0.78 Zave=2.7-3.3 delta_Zave=0.6 Zneo=n/a delta_Zneo=n/a Disrupted at 0.95s Next: Decrease density to 0.7, reduce density ramp rate
Feb 10 2012 02:26:41:340PM	1120210025	Paul Ennever	Result: nl04=n/a Zave=n/a delta_Zave=n/a Zneo=n/a delta_Zneo=n/a Fizzle Next: Repeat
Feb 10 2012 02:49:31:023PM	1120210026	Paul Ennever	Result: nl04=0.65-0.78 Zave=2.6-3.6 delta_Zave=1.0 Zneo=1.7-2.1 delta_Zneo=0.4 detaches at 0.81s, but doesn't disrupt Next: Change PG1 to 25V
Feb 10 2012 03:07:44:413PM	1120210027	Paul Ennever	Result: nl04=n/a Zave=n/a delta_Zave=n/a Zneo=n/a delta_Zneo=n/a fizzle Next: repeat
Feb 10 2012 03:19:40:133PM	1120210028	Paul Ennever	Result: nl04=.62-.77 Zave=2.5-3.2 delta_Zave=0.7 Zneo=1.75-2.0 delta_Zneo=0.25 marfs at 0.7s (what I was calling detachment) Next: Change to nl04=1.0, reduce argon puff to 50V, no nitrogen seeding
Feb 10 2012 03:31:40:793PM	1120210029	Paul Ennever	Result: nl04=0.76 Zave=2.5-3.2 delta_Zave=0.7 Zneo=n/a delta_Zneo=n/a marfs at 1.2s? denisty a little low Next: try increasing density
Feb 10 2012 03:37:27:530PM	1120210030	Paul Ennever	Result: nl04=n/a Zave=n/a delta_Zave=n/a Zneo=n/a delta_Zneo=n/a Fizzle Next: Skip higher density (difficulty, low HIREX signals) and go to seeded nl04=0.3, 50V on PG1 (shot 11 from run plan)
Feb 10 2012 04:01:23:677PM	1120210031	Paul Ennever	Result: nl04=0.36-.42 Zave=4.0-5.2 delta_Zave=1.2 Zneo=n/a delta_Zneo=n/a Next: reduce density to get closer to shot 7
Feb 10 2012 04:41:39:280PM	1120210032	Paul Ennever	Result: nl04=0.36-0.43 Zave=4.4-5.4 delta_Zave=1.0 Zneo=2.2-3.5 delta_Zneo=1.2 marf at 1.3s Next: Running out of time, letting Yunxing do the Thomson ECE cutoff calibration for the remainder of the run

Physics Operator Comments
Feb 10 2012 08:35:09:720AM	1120210001	Syunichi Shiraiwa	GAS test ..... OK
Feb 10 2012 09:14:38:737AM	1120210002	Syunichi Shiraiwa	Attempt to make a plasma Set PG3 in seg 1 to the normal shape Load ~shiraiwa/pcs/1120210001 seg 3 into seg 2. Turn on Seg 2 Adjust RXU to be the same as 1100226015 Adjust ne_04 Full length plasma. ne_04 = 0.35e20, 800kA, 5.4T PCI shutter was closed. Going to open in the next shot H-bot pressure seems too low. increased to 1.5psi Increase ne_04 request to 4.3e19
Feb 10 2012 09:32:31:293AM	1120210003	Syunichi Shiraiwa	full length plasma ne_04 is about 4e19
Feb 10 2012 09:40:44:633AM	1120210004	Syunichi Shiraiwa	HiRex calibration using lock-on. Load 1120207012 Good calibration,, according to Matt..
Feb 10 2012 10:00:35:663AM	1120210005	Syunichi Shiraiwa	Load shot 3. This shot tries to make "shot 2" in SL plan. Set ne04 to 0.35e20 Set TF ramp-down earlier starting around 1.45s Result: Fizzle. Power system, pre-puff seems to be okey. We will re-try with the same PCS setting.
Feb 10 2012 10:12:15:493AM	1120210006	Syunichi Shiraiwa	Fizzle
Feb 10 2012 10:24:37:547AM	1120210007	Syunichi Shiraiwa	Full length plasma Ne04 is about 0.3e20 Next shot : try "shot 4" in SL plan. Set ne04 to 0.25e20
Feb 10 2012 10:40:01:370AM	1120210008	Syunichi Shiraiwa	Disrupted during ramp-down. Runaways towards the end of the pulse Next : ne04=0.25
Feb 10 2012 10:49:06:927AM	1120210009	Syunichi Shiraiwa	Result : Fizzle Next : Retry
Feb 10 2012 11:03:56:183AM	1120210010	Syunichi Shiraiwa	Full length A lot of snow on the camera.... Ne04 = 0.25 Next: Try "shot 5" of SL plan set Ne04 to 0.65e20
Feb 10 2012 11:15:15:567AM	1120210011	Syunichi Shiraiwa	Full length plasma Ne04 = 5.8e19 Next: Try "Shot 6" Set ne04 at 0.85
Feb 10 2012 11:36:06:220AM	1120210012	Syunichi Shiraiwa	Full length ne04 = 0.7 Next: Try "Shot 7" in SL plan Set pg1 at 50V from 0.7s to 1.3s Set ne04 at 0.45
Feb 10 2012 11:58:36:757AM	1120210013	Syunichi Shiraiwa	Full length plasma ne04 = 0.45 Next : adjust ne04 to get the density right.
Feb 10 2012 12:01:09:047PM	1120210014	Syunichi Shiraiwa	Full length plasma ne04 = 0.4-0.45 No Thomson data for this shot. Next: Adjust ne04 to get density at 0.4
Feb 10 2012 12:19:27:537PM	1120210015	Syunichi Shiraiwa	Full length plasma Density is almost 0.4 No spectroscopy data for this shot. Next: increase pg1 voltage to 100V to increase zeff
Feb 10 2012 12:26:07:620PM	1120210016	Syunichi Shiraiwa	Disrupted at 0.9s
Feb 10 2012 12:38:57:407PM	1120210016	Syunichi Shiraiwa	Disrupted at 0.9s Next : reduce PG1 voltage to 80V
Feb 10 2012 12:39:19:757PM	1120210017	Syunichi Shiraiwa	Fizzle Next : repeat
Feb 10 2012 12:56:09:177PM	1120210018	Syunichi Shiraiwa	disrupted at 1.1s Injection at 0.95s made locked mode. Next: Proceed to "Shot 8" in SL plan Try to get the density close to shot 11
Feb 10 2012 01:15:12:220PM	1120210019	Syunichi Shiraiwa	Disrupted 0.95s Looks like plasma detached from bottom diverter, but it is USN....?? Density before the seeding starts was little lower than shot 11. Reduced the PG1 voltage from 50 to 25 V
Feb 10 2012 01:30:36:023PM	1120210020	Syunichi Shiraiwa	Ne04 is 5.8e19. Zeff is almost the same as reference shot (11) Next: increase pg1 voltage to 35V (from 25V)
Feb 10 2012 01:44:05:910PM	1120210021	Syunichi Shiraiwa	Full length plasma Ne04 = 0.58-0.6 Slight increase of zeff Next: try pg1 at 45V
Feb 10 2012 01:55:42:917PM	1120210022	Syunichi Shiraiwa	Disrupted around 1.2s Looks very similar to shot 19. Next: "Shot 9" in the run plan (Seeded nl04=0.8) Ne04 at 0.8 pg1 35V
Feb 10 2012 02:03:42:800PM	1120210023	Syunichi Shiraiwa	Post disruption fizzle... Next: repeat
Feb 10 2012 02:22:16:160PM	1120210024	Syunichi Shiraiwa	Disrupted around 1.0s Next: slow down the density program ramp rate
Feb 10 2012 02:34:29:567PM	1120210025	Syunichi Shiraiwa	Fizzle Next: repeat
Feb 10 2012 02:49:29:460PM	1120210026	Syunichi Shiraiwa	Plasma stays without disruption. detached around 0.8s. Next: reduce PG1 to 25 V
Feb 10 2012 02:56:31:483PM	1120210027	Syunichi Shiraiwa	Fizzle Retry
Feb 10 2012 03:10:34:493PM	1120210028	Syunichi Shiraiwa	Full length Similar to shot 26. Detached after N2 puff start...
Feb 10 2012 03:25:34:880PM	1120210029	Syunichi Shiraiwa	Non-seeded high density case. Setting: Ne04 at 1e20 disable Pg1 Ar puff (pg5) to 50V seg1 pre-puff shorted by 5ms Full length plasma ne04 8e19
Feb 10 2012 03:37:14:907PM	1120210030	Syunichi Shiraiwa	Fizzle Next: ne04 = 0.3 Add n2 puff at 50V
Feb 10 2012 03:38:59:337PM	1120210030	Syunichi Shiraiwa	Fizzle Next: "Shot 11" in SL plan ne04 = 0.3 Add N2 puff at 50V
Feb 10 2012 03:53:53:947PM	1120210031	Syunichi Shiraiwa	Ne04 is 0.4 Next: Adjust ne04 program to get the similar density to shot 7
Feb 10 2012 04:43:29:860PM	1120210032	Syunichi Shiraiwa	Full length plasma. But, density did not get low enough. Next: High density calibration shot. Load 1120203034 Turn off cryopump

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:32:06:503AM	Test	Ok	Gas test
2	09:00:48:373AM	Plasma	Ok
3	09:22:20:830AM	Plasma	Ok
4	09:35:39:067AM	Plasma	Ok
5	09:48:17:683AM	Plasma	Ok
6	10:01:20:390AM	Plasma	Ok
7	10:16:04:883AM	Plasma	Ok
8	10:31:48:050AM	Plasma	Ok
9	10:44:30:707AM	Plasma	Ok
10	10:57:08:837AM	Plasma	Ok
11	11:09:54:110AM	Plasma	Ok
12	11:26:15:283AM	Plasma	Ok
13	11:42:35:430AM	Plasma	Ok
14	11:55:31:110AM	Plasma	Ok
15	12:10:37:793PM	Plasma	Ok
16	12:23:19:570PM	Plasma	Ok
17	12:35:56:027PM	Plasma	Ok
18	12:48:35:340PM	Plasma	Ok
19	01:01:21:253PM	Plasma	Ok
20	01:17:15:717PM	Plasma	Ok
21	01:31:15:123PM	Plasma	Ok
22	01:44:53:703PM	Plasma	Ok
23	01:57:44:527PM	Plasma	Ok
24	02:10:20:167PM	Plasma	Ok
25	02:23:14:620PM	Plasma	Ok
26	02:36:11:763PM	Plasma	Ok
27	02:53:33:743PM	Plasma	Ok
28	03:06:09:260PM	Plasma	Ok
29	03:19:46:967PM	Plasma	Ok
30	03:32:31:650PM	Plasma	Ok
31	03:48:39:527PM	Plasma	Ok
32	04:01:49:683PM	Plasma	Ok
33	04:52:17:930PM	Plasma	Ok

System Availability

Feb 10 2012 08:31:47:473AM

System Available Comment Availability Changed Owner Description Who Can Change Active MHD no secured - tagged out Jun 02 2008 11:03AM (sears) Joe Snipes Active MHD Antenna golfit BES yes BES system is online Nov 22 2011 02:21PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan Bolometers yes Midplane and LEDGE-AX diodes functioning properly. Midplane bolometers working and calibrated. LEDGE/DIV bolometers working, but toaster calibration not yet complete. Jan 23 2012 12:02PM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization no Bottle Removed. System has been tested and will be ready once bottle is installed Jan 09 2012 06:32AM (dekow) Jim Irby Boronization dekow,irby CECE no   Jan 06 2012 03:48PM  Anne White Correlation ECE whitea CNPA yes Multiple channel CNPA available, no safety risk for in-vessel access Apr 14 2011 12:01PM (parker) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor yes Operational. He level meter not working on 500L dewar. Frank will take manual readings. Jan 11 2012 11:46AM (labombard) Brian LaBombard Upper Divertor Cryopump dekow,irby,labombard CXRS yes core-CXRS system is online Nov 22 2011 02:21PM (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 11:44AM (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 01 2009 09:45AM (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 05 2011 02:41PM (marmar) Earl Marmar Visible Bremsstrahlung Imaging marmar Disruption Mitigation no gas jet valve disabled on 2011/04/13 Apr 13 2011 02:04PM (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 DMBolo AXUV diodes yes Diodes are taking usable data. Not all post-processing code is working yet. Feb 01 2012 01:24PM (golynyk) Geoff Olynyk Set of six AXUV diodes in a toroidal array of midplane wall boxes. golynyk,granetz,mlreinke,whyte DNB yes   Dec 01 2011 11:46AM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,mochung ECDC yes Operational as of 11/19/11 Nov 22 2011 03:01PM (irby) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer FRC-ECE no Power off to RF and IF sections- Power on to DA Apr 11 2011 02:54PM (phillips) Perry Phillips Heterodyne ECE-32 channels bespam,liao,phillips,rowan,whitea FTCI no   Jan 06 2012 04:36PM  Jim Irby Fast two-color interferometer irby G-Side Ratiomatic yes   Dec 02 2011 12:24PM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland Glow Discharge no Power supply unplugged and redtagged, HV cables removed Apr 14 2011 08:03AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby GPC yes Using new preamps. Nov 30 2011 07:51AM (hubbard) Amanda Hubbard ECE Polychromater hubbard GPC2 yes Dewar cold. Nov 21 2011 09:55AM (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 01 2009 09:45AM (terry) Jim Terry Gas Puff Imaging terry,zweben H/D yes system is functional and taking data Dec 05 2011 02:42PM (marmar) Earl Marmar H/D Ratio marmar HEAT yes   Jan 09 2012 06:32AM (dekow) Gary Dekow - Machine Heaters - burke,dekow Hirex Jr yes Hirex-Jr has been installed Jun 28 2010 03:36PM (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 06 2011 08:21AM (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 12:05PM (parker) Ron Parker Hard X-Ray Array faust,parker,schmidt ICRF D-Antenna no secured Apr 14 2011 08:55AM (wukitch) Steve Wukitch D-port antenna wukitch,ylin ICRF E-Antenna no secured Apr 14 2011 08:55AM (wukitch) Steve Wukitch E-port antenna wukitch,ylin ICRF J-Antenna no secured Apr 14 2011 08:56AM (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 11:46AM (blip) Bruce Lipshultz Measurement of recycling light and impurity source rates at multiple surfaces around the tokamak blip,miller Laser Blow-Off yes Operational and tested Jan 06 2012 03:50PM (g) Martin Greenwald Impurity Injection System g,nthoward Lower Hybrid no LH HV Breaker Opened and Tagged, TPS Upgrade Underway Nov 10 2011 03:51PM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg Lower Hybrid Reflectometer no off Apr 15 2011 08:24AM (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. Jan 23 2012 12:03PM (mlreinke) Matthew L. Reinke Long Wavelength Extreme Ultraviolet Spectrometer markchil,mlreinke LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar Ly-alpha yes Midplane Lyman-a and LEDGE-LY working normally. New B-PORT Lyman (BPLY) still being debugged. Jan 23 2012 12:04PM (mlreinke) Matt Reinke Lyman alpha cameras faustian,labombard,mlreinke Magnetics yes   Dec 01 2011 11:51AM (g) Robert Granetz Bp coils and flux loops for equilibrium control granetz,wolfe McPherson no **vacuum system problem*** McPherson viewing the 10-14 nm region for molybdenum monitoring. It's days are numbered as LoWEUS has demonstrated superiority. Jan 31 2012 08:15AM (mlreinke) Jim Terry VUV Spectrometer markchil,mlreinke,terry Michelson yes Front end at 4.5e-8 T. Reduced speed for initial operation. Nov 30 2011 07:51AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt MKS yes   Dec 02 2011 12:27PM (toland) Brian LaBombard Baratron pressure gauges labombard,toland MLP no System is in edge lab. Version 2 drivers ready to test. Needs a student to help work on it. Jul 14 2009 09:20PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard MSE no 1/3/2011: push-pull mechanism broken. MSE inoperative Jan 03 2012 11:47AM (sscott) Steve Scott Motional Stark Effect jinseok,sscott Neutrons yes High voltage is on. We're ready for plasma. Nov 21 2011 12:58PM (fiore) Catherine Fiore Neutron Detectors fiore Neuts and Hards yes All detectors Powered On --- Waiting for neutrons for calibration Nov 22 2011 01:05PM (irby) Jim Irby X-Ray/Neutron Detectors at K-Hor irby NINJA yes C-bottom and new F-bottom system ready. Dec 02 2011 12:28PM (toland) Brian LaBombard NINJA gas puff labombard,terry,toland PCI yes Operational. Nov 30 2011 12:45PM (ntsujii) Miklos Porkolab Phase Contrast Imaging emd,ennever,ntsujii,porkolab Penning Gauges yes Operational. High voltage comes on during INIT and off at RECOOL. Dec 09 2011 09:48AM (labombard) Brian LaBombard Penning Ionization Gauges labombard Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Jul 01 2009 09:46AM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe Polarimeter yes 3 chords operational but with high noise level Jan 06 2012 04:22PM (irby) Jim Irby C-Mod Polarimeter irby Power - Alternator Air Switch yes   Jan 09 2012 06:33AM (dekow) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby Power - PEI yes   Jan 09 2012 06:33AM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby Power - TMX yes   Jan 09 2012 06:33AM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby Power Systems yes   Jan 09 2012 06:33AM (dekow) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby Probe Array - ISD yes Operational, except for probe #1 (open circuit) and probe #16 (not installed). Dec 09 2011 09:50AM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard Probe Array - LH yes Operational, except for bottom-D probe (open circuit). Dec 09 2011 09:52AM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard Probe Array - OSD yes F-divertor ok. J-divertor ok, except for JDIV_06 which is shorted out. Dec 09 2011 09:54AM (labombard) Brian LaBombard Outer Lower Divertor Probe Array (F and J) labombard Probe Array - UDIV yes Operational except for probes #4, 5 and 13 (open) Dec 09 2011 09:56AM (labombard) Brian LaBombard Upper Divertor Probe Array labombard Reflectometer yes As of 1120105xxx, all channels are connected Jan 05 2012 09:14AM (dominguez) Earl Marmar Reflectometer dominguez,marmar Scanning Probe - ASP yes Ion Sensitive Probe head installed. Testing in piggy-back mode. Dec 20 2011 12:33PM (labombard) Brian LaBombard A-Port Scanning Probe labombard Scanning Probe - FSP yes Operational. Dec 09 2011 09:57AM (labombard) Brian LaBombard F-Port Scanning Probe labombard Scanning Probe - WASP yes A-port WASP is operational. K-port WASP is dead (all probes melted together). Dec 09 2011 09:58AM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick Shoelace Antenna yes Fixed frequency operation available (100kHz) at moderate power (< 0.5kW). Otherwise in receiver mode. Jan 11 2012 11:50AM (labombard) Brian LaBombard High-k active MHD antenna, for QCM, WCM studies golfit,labombard SOL reflectometer yes c-port waveguides operational, h-port waveguides are not. Nov 29 2011 12:04PM (cornwall) Cornwall Lau SOL reflectometer cornwall,wukitch,ylin Sparker yes New Type II sparker replaced Type I on 11/17/2011 Nov 23 2011 08:53AM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin Surface Science Station no SSS is up to air, no safety issues Apr 14 2011 12:06PM (ochoukov) Bruce Lipschultz Radially scanning probe located on K-port blip,ochoukov TCI yes TCI Operational. Density feedback operational. Nov 10 2011 11:47AM (irby) Jim Irby Two-Color Interferometer irby,murray TS - Core yes Operating with two 50Hz lasers, precise density calibration still required. Feb 03 2012 04:04AM (jwhughes) Jerry Hughes Core Thomson scattering jrwalk,jwhughes,yma TS - Edge yes System taking data. Requires calibration. Feb 03 2012 04:05AM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jrwalk,jwhughes,yma Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (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. Jan 23 2012 12:13PM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer markchil,mlreinke XTOMO yes ARRAY1->4 working normally, ARRAY5 (new core view) working but spatial calibration issues not yet resolved Jan 23 2012 12:13PM (mlreinke) Robert Granetz X-Ray Tomography faustian,granetz,mlreinke