Miniproposals

Miniproposal: 493 Date Filed: 6/18/2007 Title: Ohmic L-H Threshold Experiments First Author: Brian Labombard Session Leader: Brian Labombard (shots 1-34)

Engineering Operator Run Comment

MP493 Ohmic L-H Threshold Experiments PB: MP477 Ohmic ITBs SL: Brian LaB

Session Leader Plans

Entered: Mar 12 2008 02:45:42:960PM

Author: Brian Labombard

Run Plan for 1080313 MP#493 ""Ohmic L-H Threshold Experiments"" Goal Investigate in detail the plasma conditions near the last-closed flux surface (pressure gradients, collisionality, plasma flows...) that are associated with ohmic L-H transitions. Approach We will ""dial-up"" some ohmic H-modes by the usual method of ramping the toroidal field down and then back up slightly after L-H transition. We will look at edge plasma flows and gradients just before and after transition with all available edge diagnositcs. In particular, we will be taking the time to optimize scanning probe insertion depths and times so as to cleanly resolve the velocity shear layer - this will involve taking some risks with the probes. We will also run some matched upper-null (USN) discharges to see if there are any differences in the flow and pressure gradient profiles that might hint as to why LSN discharges go into H-mode but USN ones do not. Plan Start by re-running shot#1080124009. This was a 0.8 MA LSN shot with a TF ramp-down: 5.4 tesla at 0.32 s, ramping down to 2.8 tesla by 1.15s and then back up to 3.5 tesla. NL04 was 0.61e20. We will spend a few shots optimizing the ohmic H-mode (start time, transition from ELM-free to EDA) by adjusting TF ramp and starting density. In particular, we wish to attain L-H transitions at slightly higher q95 and NL04 than on 1080124, which should push the H-mode towards the EDA regime. Hopefully the overnight boronization will minimize the radiated power fraction, enabling higher-density ohmic L-H transitions. The higher q95 may also help us avoid q95 ~ 3 disruptions that have tended to occur during the matched USN dishcarges (part B below). A. 0.8 MA, LSN - 8 shots Re-run shot#1080124009 i. Optimize scanning probe plunge depths and scan times to record the evolution of conditions before the L-H transition while q95 is ramping down. The last probe scan should ideally occur just before the L-H transition. The probes will probably need a few shots to clean off the boronization layer. B. 0.8 MA, USN - 6 shots Reload from shot #1080124018 (which ran on segment#3). Make the following program changes: - Program the same: (1) plasma current, (2) TF ramp and (3) target density as in ""A"". - Decrease R_XL by 4.0 cm - Increase Z_XL by 0.5 cm - Decrease R_XU by 1.5 cm - Decrease right gap by 0.3 cm These changes should make the plasma shape look like an up-down mirror reflection of LSN the discharges in ""A"". i. Optimize scanning probe plunge depths and scan times to record conditions as q95 is ramping down. Make sure that the probes scan deep enough to resolve shear layer. C. 0.8 MA, LSN, EDA - 4 shots i. If a steady EDA phase was obtained in ""A"" then reload the best shot from ""A"". Optimize scanning probe plunge depths and scan times to record the edge flow shear layer during EDA. D. 0.6 MA, LSN - 6 shots Reload best LSN shot from ""A"". Make the following changes: - Program Ip=0.6 MA - Reduce NL04 by 0.1e20 - Extend TF rampdown in time to reach 2.4 tesla at same ramp rate (~ -3 tesla/s). Keep the subsequent TF ramp-up the same. Optimize ohmic H-mode (start time, transition from ELM-free to EDA) by adjusting TF ramp and starting density. i. Optimize scanning probe plunge depths and scan times to record the evolution of conditions before the L-H transition while q95 is ramping down. The last probe scan should ideally occur just before the L-H transition. E. 0.6 MA, USN - 2 shots Reload the best USN shot from ""B"" above. Program same plasma current, TF ramp and target density as in ""D"". i. Optimize scanning probe plunge depths and scan times to record conditions as q95 is ramping down. Make sure that the probes scan deep enough to resolve shear layer. F. 1.2 MA, LSN - 6 shots Reload best LSN shot from ""A"". Make the following changes: - Program Ip=1.2 MA - Increase NL04 by 0.1e20 - Load TF programming from 1080124034 (segment #2). This has a ramp-up to 6 tesla followed by a ramp-down and hold at 4.5 tesla. Change programming to ramp back up to 5.4 tesla as soon as 4.5 tesla is achieved. Optimize ohmic H-mode (start time, transition from ELM-free to EDA) by adjusting TF ramp and starting density. i. Optimize scanning probe plunge depths and scan times to record the evolution of conditions before the L-H transition while q95 is ramping down. The last probe scan should ideally occur just before the L-H transition. G. 1.2 MA, USN - 2 shots Reload the best USN shot from ""B"" above. Program same plasma current, TF ramp and target density as in ""F"". i. Optimize scanning probe plunge depths and scan times to record conditions as q95 is ramping down. Make sure that the probes scan deep enough to resolve shear layer.

Physics Operators Plans

Entered: Mar 12 2008 12:18:56:680PM

Author: Ron Parker

------------------------------------------------------------------------ -- Engineering Setup for Thursday 13 Mar 2008 ----------------- MP493 Ohmic L-H Threshold Experiments PB: MP477 Ohmic ITBs SL: Brian LaBombard PO: Ron Parker ** Overnight boronization required ** ------------------------------ Boronization Parameters ------------------------------ rmin/rdwell/rmax: 60/75/80 cm tdwell/tsweep: 60/120 s ~60 mTorr foreline pressure EF4 current: 200 A Post boronization ECDC in He, then D2 ------------------------------ ECDC Parameters ------------------------------ gas and pressure: D2 at 2e-4 Torr sweep: 44/45/103 cm scan: 20/120 s Vessel temperature: 35/35/35 Run will start at 09:00 and end at 17:00. Power systems as on: 1080124009 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 deuterium DISABLED Enable gatevalves and shutters: ECE, VUV, DNB, Z-bolo Key Diagnostics: Scanning probes (ASP, FSP, WASP), CXRS systems (with NINJA and DNB), GPI, Edge Thomson, HIREXs Torvac setup: keep gate valves open No ICRF No LH Yes DNB No Cryopump Physop plan: ------------ Setup for first plasma: Load from shot#1080124009 with no changes (apart from startup). This was a 0.8 MA LSN shot with a TF ramp-down: 5.4 tesla at 0.32 s, ramping down to 2.8 tesla by 1.15s and then back up to 3.5 tesla. NL04 was 0.61e20. We will spend a few shots optimizing the ohmic H-mode (start time, transition from ELM-free to EDA) by adjusting TF ramp and starting density. See session leader plan for remaining shots.

Session Leader Summaries

Entered: Mar 13 2008 10:31:17:030PM

Author: Brian Labombard

Run Summary for 1080313 MP#493 ""Ohmic L-H Threshold Experiments"" The run went very well, producing many ohmic H-modes. In fact, we found it difficult not to produce ohmic H-modes today. The boronization was very effective in reducing the radiated power, leading to H-mode transitions that quickly evolved into EDA. The toroidal-field ramp-down method of producing ohmic H-modes appears to be much more robust than previously thought. First we got some nice EDA H-modes leading to ITBs in LSN plasmas (0.8 MA). Probes were scanned to look at the edge shear layer. Then we went and dialed up some USN discharges with the intent of looking for differences in the edge shear layer in discharges that do not go into H-mode, but are otherwise matched in current, field and density. To our surprise, these discharges also exhibited an ohmic L-H transition followed by ITB at about the same time in the shot! We thought that we might be able to turn on the argon puff for the HIREX systems. However, we found that even a small (75 ms, shot#7) puff lead to a significant increase in radiated power, impurity accumulation and change in H-mode character to Elm-free with no following ITB. For this reason, we left the argon off for the rest of the day. This was an unfortunate necessity because it meant the we could not get any HIREX L-H rotation data. We spent some time poking at EDA H-modes with the scanning probes to record the shear layer. Large amplitude QCM signals were seen on the scanning probes. The phase velocities of the QCM were found to be very similar to the broadband turbulence prior to the H-mode. Ohmic H-modes were also studied at 0.6 MA in LSN and USN. Again, an ohmic L-H transition (EDA followed by ITB) was seen in USN at about the same time as in LSN. Finally, we were unsuccessful in finishing the 1.2 MA LSN/USN comparison, obtaining just a single 1.2 MA shot in LSN. By the way - the Ohmic L-H transition at 1.2 MA occurred at 5.3 tesla; no field ramp-down was required. The DNB was operated today and performed very well with beam currents approached 7 amps with few trips (Bob was very proud). This bodes well for obtaining some outer CXRS flow information in these ohmic L and H-modes. NINJA puffing was use extensively across the L-H transitions today, with data being recorded on fast-diodes, cameras, and gas-puff CXRS systems. ___________________________________________________________________________________ Quick shot log 01-LSN, early disruption 02-LSN, Ip=0.8, Bt=5.4-2.8, L-mode, NINJA puff at 0.9, no probes scanning 03-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.176, NL04=0.9, SP @ 0.6, 0.8, 1.05s, ASP(+7), FSP(-7), WASP EDA H-mode, Catherine reports weak ITB 04-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.18, NL04=0.86, SP @ 0.6, 0.8, 1.05s, ASP(+7), FSP(-4), WASP EDA H-mode, Catherine reports another weak ITB 05-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.22, NL04=0.88, SP @ 0.6, 0.8, 1.15s, ASP(+7), FSP(-1), WASP EDA H-mode 06-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.08, NL04=0.72, SP @ 0.6, 0.8, 1.15s, ASP(+7), FSP(+1), WASP last scan in H-mode, EDA H-mode, ITB, central Thomson ramps up over 6e20 07-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.15, NL04=0.87, SP @ 0.6, 0.8, 1.05s, ASP(+7), FSP(+2), WASP good probe targeting, a couple of EFHs, Prad is up from argon puff 08-USN, early disruption 09-USN, Ip=0.8, Bt=5.4-2.8, NL04=0.7, no probes scanning 10-USN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.1, NL04=0.88, SP @ 0.6, 0.8, 1.05s, ASP(+5), FSP(+2), WASP Ohmic H-mode and ITB!! in USN! 11-USN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.1, NL04=0.81, SP @ 0.6, 0.8, 1.05s, ASP(+5), FSP(+2), WASP Another ohmic H-mode and ITB in USN 12-USN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.11, NL04=0.87, SP @ 0.6, 0.8, 1.05s, ASP(+5), FSP(+2), WASP Another ohmic H-mode and ITB in USN 13-USN, Ip=0.8, Bt=5.4-2.8, NL4=0.75, SP @ 0.6, 0.8, 1.05s, ASP(+6), FSP(+4), WASP disrupts just after thrid probe scan 14-USN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.13, NL4=0.82, SP @ 0.6, 0.8, 1.05s, ASP(+6), FSP(+4), WASP Another ohmic H-mode and ITB in USN, ASP FSP records high frequency (~10 kHz) oscillation on third scan. 15-USN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.11, NL4=0.80, SP @ 0.6, 0.8, 1.05s, ASP(+5.5), FSP(+4), WASP Another ohmic H-mode and ITB in USN 16-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.07, NL04=0.64, SP @ 0.6, 0.8, 1.05s, ASP(+7), FSP(+2), WASP Elm-free 17-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.0, NL04=0.74, SP @ 0.6, 0.8, 1.05s, ASP(+8), FSP(+2), WASP L,L,EFH to EDA 18-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 0.9, NL04=0.75, no probes scanning EFH to EDA 19-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 0.87, NL04=0.84, SP @ 0.6, 0.9, 1.2s, ASP(+7)-not scanning, FSP(+2), WASP L,EFH,EFH to EDA 20-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 0.87, NL04=0.83, SP @ 0.6, 0.9, 1.2s, ASP(+6), FSP(+1), WASP L,EFH to EDA 21-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 0.9, NL04=0.84, SP @ 1.2s, ASP(+8), FSP(+3), WASP EDA, ASP could be deeper, FSP is too deep. 22-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 0.9, NL04=0.82, SP @ 1.2s, ASP(+9), FSP(+2), WASP EDA, ASP too deep, FSP is ok. 23-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 0.87, NL04=0.83, SP @ 1.2s, ASP(+8.5), FSP(+2), WASP EDA, ASP & FSP data ok 24- early disruption 25- early disruption 26-LSN, Ip=0.6, Bt=5.4-2.8, L-mode, no probes scanning 27-LSN, Ip=0.6, Bt=5.4-2.4, L-H @ 1.4, NL04=0.71, SP @ 0.6, 0.9, 1.2s, ASP(+8), FSP(+2), WASP 28-LSN, Ip=0.6, Bt=5.4-2.4, L-H @ 1.27, NL04=0.6, SP @ 0.7, 1.0, 1.3s, ASP(+9), FSP(+3), WASP L,L, EFH 29-LSN, Ip=0.6, Bt=5.4-2.4, L-H @ 1.27, NL04=0.65, SP @ 0.7, 1.0, 1.2s, ASP(+9), FSP(+3), WASP good targeting 30-USN, Ip=0.6, Bt=5.4-2.4, L-H @ 1.27, NL4=0.70, SP @ 0.6, 0.8, 1.2s, ASP(+5.5), FSP(+4), WASP 31-USN, Ip=0.6, Bt=5.4-2.8, L-H @ 1.27, NL04=0.68, SP @ 0.7, 1.0, 1.2s, ASP(+7), FSP(+6), WASP 32-LSN, Ip=1.2, Bt=5.9-4.5, first L-H @0.84, NL04=0.91, SP @ 0.6, 0.8, 1.00s, ASP(+6), FSP(-3), WASP L, L, EDA 33- early disruption 34-strong fizzle

Physics Operator Summaries

Entered: Mar 13 2008 05:38:18:830PM

Author: Ron Parker

The machine performed well today. Although there were many disruptions, most were "intentional", as they were caused by Li pellet injection near the end of the shot. There were no machine nor data system failures. After shot 9, the power room was briefly entered on suspicion of a burning smell, but nothing was found. The run plan called for dynamic TF field variations and a variety of currents and densities. All shots were Ohmic only. A surprising result was the production of upper-null, Ohmic H-modes with threshold well below that expected based on ITER scaling. See SL summary. Scorecard: 34 plasma attempts, 12 disruptions before rampdown (but 4 still satisfactory for run objectives), 17 full length shots, and 5 disruptions during rampdown (also satisfactory for run objectives.) No duds, nor fizzles.

Session Leader Comments
Mar 13 2008 09:35:07:270AM	1080313002	Brian Labombard	02-LSN, Ip=0.8, Bt=5.4-2.8, L-mode, NINJA puff at 0.9, no probes scanning Next: repeat with prohes scanning, NL04 = 0.6
Mar 13 2008 09:48:34:660AM	1080313003	Brian Labombard	03-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.176, NL04=0.9, SP @ 0.6, 0.8, 1.05s, ASP(+7), FSP(-7), WASP EDA H-mode, Catherine reports weak ITB Next: repeat with probes deeper, NL04 progam at 0.55
Mar 13 2008 10:02:14:737AM	1080313004	Brian Labombard	04-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.18, NL04=0.85, SP @ 0.6, 0.8, 1.05s, ASP(+7), FSP(-4), WASP EDA H-mode, Catherine reports another weak ITB Repeat: probes deeper, NINJA later
Mar 13 2008 10:14:54:723AM	1080313005	Brian Labombard	05-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.22, NL04=0.88, SP @ 0.6, 0.8, 1.15s, ASP(+7), FSP(-1), WASP EDA H-mode Next: repeat, probes deeper.
Mar 13 2008 10:26:48:910AM	1080313006	Brian Labombard	06-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.08, NL04=0.72, SP @ 0.6, 0.8, 1.15s, ASP(+7), FSP(+1), WASP EDA H-mode, ITB, central Thomson ramps up over 6e20 Next: repeat with different probe timing, argon on.
Mar 13 2008 10:39:27:987AM	1080313007	Brian Labombard	07-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.15, NL04=0.87, SP @ 0.6, 0.8, 1.05s, ASP(+7), FSP(+2), WASP good probe targeting, a couple of EFHs, Prad is up from argon puff Next: go to USN, no probes scanning
Mar 13 2008 11:24:40:720AM	1080313009	Brian Labombard	09-USN, Ip=0.8, Bt=5.4-2.8, NL04=0.7, no probes scanning Touching on inner nose Next: repeat with RX_L change
Mar 13 2008 11:51:27:893AM	1080313010	Brian Labombard	10-USN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.1, NL04=0.88, SP @ 0.6, 0.8, 1.05s, ASP(+5), FSP(+2), WASP Ohmic H-mode and ITB!! in USN!
Mar 13 2008 12:06:33:597PM	1080313011	Brian Labombard	11-USN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.1, NL04=0.81, SP @ 0.6, 0.8, 1.05s, ASP(+5), FSP(+2), WASP Another ohmic H-mode and ITB in USN
Mar 13 2008 12:23:59:113PM	1080313012	Brian Labombard	12-USN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.11, NL04=0.87, SP @ 0.6, 0.8, 1.05s, ASP(+5), FSP(+2), WASP Another ohmic H-mode and ITB in USN
Mar 13 2008 12:24:37:427PM	1080313013	Brian Labombard	13-USN, Ip=0.8, Bt=5.4-2.8, NL4=0.75, SP @ 0.6, 0.8, 1.05s, ASP(+6), FSP(+4), WASP disrupts just after third probe scan Repeat with FSP pulled out 2mm
Mar 13 2008 12:49:09:720PM	1080313014	Brian Labombard	14-USN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.13, NL4=0.82, SP @ 0.6, 0.8, 1.05s, ASP(+6), FSP(+4), WASP Another ohmic H-mode and ITB in USN, ASP FSP records high frequency (~10 kHz) oscillation on third scan.
Mar 13 2008 01:07:33:613PM	1080313015	Brian Labombard	15-USN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.11, NL4=0.80, SP @ 0.6, 0.8, 1.05s, ASP(+5.5), FSP(+4), WASP Another ohmic H-mode and ITB in USN Next: go to LSN
Mar 13 2008 01:08:21:080PM	1080313016	Brian Labombard	16-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.07, NL04=0.64, SP @ 0.6, 0.8, 1.05s, ASP(+7), FSP(+2), WASP Elm-free Next: higher density
Mar 13 2008 01:24:21:473PM	1080313017	Brian Labombard	17-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 1.0, NL04=0.74, SP @ 0.6, 0.8, 1.05s, ASP(+8), FSP(+2), WASP L,L,EFH to EDA Next: move Bt ramp-down to earlier time (by 100 ms)
Mar 13 2008 01:36:04:270PM	1080313018	Brian Labombard	18-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 0.9, NL04=0.75, no probes scanning EFH to EDA Next: Increase NL04 by 0.05, scan probes
Mar 13 2008 01:54:50:597PM	1080313019	Brian Labombard	19-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 0.87, NL04=0.84, SP @ 0.6, 0.9, 1.2s, ASP(+7)-not scanning, FSP(+2), WASP L,L,EFH to EDA
Mar 13 2008 02:19:43:817PM	1080313020	Brian Labombard	20-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 0.87, NL04=0.83, SP @ 0.6, 0.9, 1.2s, ASP(+6), FSP(+1), WASP L,EFH to EDA
Mar 13 2008 02:20:02:190PM	1080313021	Brian Labombard	21-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 0.89, NL04=0.87, SP @ 1.2s, ASP(+8), FSP(+3), WASP EDA, ASP could be deeper, FSP is too deep. Next: repeat
Mar 13 2008 02:30:39:063PM	1080313022	Brian Labombard	22-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 0.9, NL04=0.82, SP @ 1.2s, ASP(+9), FSP(+2), WASP EDA, ASP too deep, FSP is ok Next: repeat
Mar 13 2008 02:53:21:363PM	1080313023	Brian Labombard	23-LSN, Ip=0.8, Bt=5.4-2.8, L-H @ 0.87, NL04=0.83, SP @ 1.2s, ASP(+8.5), FSP(+2), WASP EDA, ASP & FSP data ok Next: go to 0.6 MA, LSN
Mar 13 2008 03:21:29:873PM	1080313026	Brian Labombard	26-LSN, Ip=0.6, Bt=5.4-2.8, L-mode, no probes scanning
Mar 13 2008 03:43:41:313PM	1080313027	Brian Labombard	27-LSN, Ip=0.6, Bt=5.4-2.8, L-H @ 1.4, NL04=0.71, SP @ 0.6, 0.9, 1.2s, ASP(+8), FSP(+2), WASP
Mar 13 2008 03:52:46:080PM	1080313028	Brian Labombard	28-LSN, Ip=0.6, Bt=5.4-2.8, L-H @ 1.27, NL04=0.6, SP @ 0.7, 1.0, 1.3s, ASP(+9), FSP(+3), WASP L,L, EFH
Mar 13 2008 04:25:28:920PM	1080313029	Brian Labombard	29-LSN, Ip=0.6, Bt=5.4-2.4, L-H @ 1.27, NL04=0.65, SP @ 0.7, 1.0, 1.2s, ASP(+9), FSP(+3), WASP good targeting
Mar 13 2008 04:25:53:063PM	1080313030	Brian Labombard	30-USN, Ip=0.6, Bt=5.4-2.4, L-H @ 1.27, NL4=0.70, SP @ 0.6, 0.8, 1.2s, ASP(+5.5), FSP(+4), WASP could be deeper
Mar 13 2008 05:25:32:063PM	1080313032	Brian Labombard	32-LSN, Ip=1.2, Bt=5.9-4.5, first L-H @0.84, NL04=0.91, SP @ 0.6, 0.8, 1.00s, ASP(+6), FSP(-3), WASP L, L, EDA

Physics Operator Comments
Mar 13 2008 08:38:06:893AM	1080313001	Ron Parker	Good morning!. All systems go for a prompt start.
Mar 13 2008 08:53:00:520AM	1080313001	Ron Parker	There will be a short delay for cell access before run begins.
Mar 13 2008 09:15:06:707AM	1080313001	Ron Parker	Shot 1 disrupted very early, 20 ms. Good breakdown, gas pulse looks about right.
Mar 13 2008 09:30:19:380AM	1080313002	Ron Parker	Shot 2 started up well,and ran full length.
Mar 13 2008 09:41:22:893AM	1080313003	Ron Parker	Shot 3 ran OK, H-Mode developed at 1.2 s.
Mar 13 2008 09:56:19:080AM	1080313004	Ron Parker	Shot 4 ran full length. Ohmic H-modes continue to develop.
Mar 13 2008 10:14:13:597AM	1080313005	Ron Parker	Shot 5 continued the trend -- full length.
Mar 13 2008 10:20:43:940AM	1080313006	Ron Parker	Shot 6 ran, disrupted on the current rampdown -- density limit disruption?
Mar 13 2008 10:23:03:427AM	1080313006	Ron Parker	Next shot will have 75 ms of Argon, beginning at 0.3 s.
Mar 13 2008 10:31:15:517AM	1080313007	Ron Parker	Shot was OK, disrupting in rampdown at ~ 350 kA.
Mar 13 2008 10:50:49:270AM	1080313007	Ron Parker	Next shot: Moving to Upper Null -- see SL run plan.
Mar 13 2008 10:57:19:473AM	1080313008	Ron Parker	Shot 8 didn't get very far -- used startup from 1080124018 and disrupted at ~ 45 ms. Not clear why. Resume startup from 1080313007 for next shot.
Mar 13 2008 11:15:17:380AM	1080313009	Ron Parker	Shot 9 ran full lenght, lower X-point looks like its too far inside. For next shot reduce RXL from -5 cm to -2 cm.
Mar 13 2008 11:16:43:910AM	1080313009	Ron Parker	Ooops, computer glitch after shot 9. While it's being looked at, power room entry.
Mar 13 2008 11:25:13:173AM	1080313009	Ron Parker	Delay in the action. Suspicious smell detected in power room. Probably not anthropogenic.
Mar 13 2008 11:31:41:410AM	1080313009	Ron Parker	No problem found. Ready for shot.
Mar 13 2008 11:56:27:207AM	1080313010	Ron Parker	Shot 10 ran full length. Upper null Ohmic H-mode!
Mar 13 2008 11:55:06:330AM	1080313011	Ron Parker	Shot 11 went full length.
Mar 13 2008 12:13:50:563PM	1080313012	Ron Parker	Shot 12 ran full length. Another Upper Null Ohmic H-mode.
Mar 13 2008 12:28:17:063PM	1080313013	Ron Parker	Shot 13 disrupted because probe was inserted too deep.
Mar 13 2008 12:42:58:690PM	1080313014	Ron Parker	Shot 14 ran full length
Mar 13 2008 12:49:32:880PM	1080313015	Ron Parker	Shot 15 disrupted at ~ 1.52 s -- no apparent cause.
Mar 13 2008 12:51:45:800PM	1080313015	Ron Parker	Next: Replay of shot 1080313007.
Mar 13 2008 01:01:48:817PM	1080313016	Ron Parker	Back to lower null on Shot 16, but it disrupted beginning around 1.4 s.
Mar 13 2008 01:11:35:847PM	1080313017	Ron Parker	Shot 17 ran more or less full length, although it struggled on the way down.
Mar 13 2008 01:32:37:690PM	1080313018	Ron Parker	Shot 18 ran OK, disrupting on current rampdown.
Mar 13 2008 01:42:45:143PM	1080313019	Ron Parker	Shot 19 ran OK; fairly long Ohmic H-mode.
Mar 13 2008 01:54:30:143PM	1080313019	Ron Parker	Next shot: reduce outer gap by 2 mm, with no change on RCUR.
Mar 13 2008 01:56:24:223PM	1080313020	Ron Parker	Shot 20 ran almost full length, struggling on the rampdown (pellet fragments?)
Mar 13 2008 02:16:39:393PM	1080313021	Ron Parker	Shot 21 started well, ran well, but disrupted at ~1.52 s
Mar 13 2008 02:31:58:927PM	1080313022	Ron Parker	Shot 22 ran well, then disrupted due to pellet injection.
Mar 13 2008 02:51:15:080PM	1080313023	Ron Parker	Shot 23 again disrupted due to pellet, but after SL's data were recorded.
Mar 13 2008 02:52:53:987PM	1080313024	Ron Parker	Shot 24 never got to programmed current, disrupting at 20-25 ms. Probably cummulative effect of pellet-induced, full current disruptions.
Mar 13 2008 03:06:09:413PM	1080313025	Ron Parker	Another disruption, this one at 360 ms.
Mar 13 2008 03:16:40:730PM	1080313026	Ron Parker	Shot 26 ran full length.
Mar 13 2008 03:20:03:077PM	1080313026	Ron Parker	On shot 26, TF rampdown was not long enough, so on next shot it will be extended by 150 ms.
Mar 13 2008 03:31:10:797PM	1080313027	Robert Granetz	Granetz taking over for Ron prior to this shot. Tweak CLEARIN and RCUR to decrease inner gap by 1.5 mm by the end of the flattop (i.e. ramping during the flattop) without changing the outer gap.
Mar 13 2008 03:43:19:360PM	1080313027	Robert Granetz	Shot 27 -- Plasma. Good shot. Gaps are acceptable. Next shot: no DPCS changes
Mar 13 2008 03:54:35:687PM	1080313028	Robert Granetz	Shot 28 -- Plasma. Got an ELMfree H-mode late in the Ip flattop. Next shot: no DPCS changes
Mar 13 2008 04:11:31:330PM	1080313029	Robert Granetz	Shot 29 -- Plasma. Good shot. Next shot: switch back to upper null, based on seg 3 from shot 15, except load Btor, Ip, and nl_04 programming from this shot (29).
Mar 13 2008 04:18:58:407PM	1080313030	Robert Granetz	Shot 30 -- Plasma. Upper null. Got a short H-mode. Next shot: no DPCS changes
Mar 13 2008 04:33:35:063PM	1080313031	Robert Granetz	Shot 31 -- Plasma. Good shot. Upper null. Short H-mode. Next shot: reload seg 2,3,4 from 1080124034 (1.2 MA, Bt ramps to 6 T and then back to 5.4 T)
Mar 13 2008 04:47:07:453PM	1080313032	Robert Granetz	Shot 32 -- Plasma. 1.2 MA; disrupted at t=1.43 s because it went into an ELMfree H-mode and the density just kept climbing. Btor went up to 6 T and then ramped down to 4.5 T. Next shot: reduce pre-fill by 4 ms (disruption recovery)
Mar 13 2008 04:51:51:610PM	1080313033	Robert Granetz	Shot 33 -- Plasma, but disrupted very early. Looks like an injection. Next shot: reduce pre-fill pulse by 2 ms and try again. This will be the last shot.
Mar 13 2008 05:07:16:343PM	1080313034	Robert Granetz	Shot 34 -- Plasma/fizzle. Got to 100 kA when something hit it at t=24 ms. End of run

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:11:04:770AM	Plasma	Ok
2	09:23:59:173AM	Plasma	Ok
3	09:36:29:487AM	Plasma	Ok
4	09:49:50:377AM	Plasma	Ok
5	10:02:24:440AM	Plasma	Ok
6	10:14:46:317AM	Plasma	Ok
7	10:27:22:050AM	Plasma	Ok
8	10:49:55:737AM	Plasma	Ok
9	11:02:58:613AM	Plasma	Ok
10	11:32:49:330AM	Plasma	Ok
11	11:49:56:720AM	Plasma	Ok
12	12:02:28:080PM	Plasma	Ok
13	12:15:06:630PM	Plasma	Ok
14	12:27:36:880PM	Plasma	Ok
15	12:42:19:033PM	Plasma	Ok
16	12:55:01:130PM	Plasma	Ok
17	01:07:26:597PM	Plasma	Ok
18	01:23:28:143PM	Plasma	Ok
19	01:35:55:673PM	Plasma	Ok
20	01:53:36:520PM	Plasma	Ok
21	02:06:19:690PM	Plasma	Ok
22	02:19:39:550PM	Plasma	Ok
23	02:32:17:690PM	Plasma	Ok
24	02:46:50:423PM	Plasma	Ok
25	02:59:21:283PM	Plasma	Bad	OH1 Self Powered fault due to disruption
26	03:13:02:150PM	Plasma	Ok
27	03:29:33:267PM	Plasma	Ok
28	03:42:14:627PM	Plasma	Ok
29	03:55:26:627PM	Plasma	Ok
30	04:08:20:343PM	Plasma	Ok
31	04:20:48:877PM	Plasma	Ok
32	04:34:28:047PM	Plasma	Ok
33	04:47:52:093PM	Plasma	Ok
34	05:00:31:687PM	Plasma	Ok

System Availability

Mar 13 2008 09:10:55:910AM

System Available Comment Availability Changed Owner Description Who Can Change Active MHD yes Fully operational Mar 28 2007 09:19PM (sears) Joe Snipes Active MHD Antenna sears,snipes BES yes vertical array of six views at R ~ 87.3 cm, radial array of three views out to R ~ 89 cm, both at outboard midplane. Three discrete fiber views of beam at R ~ 70.0, 76.5 and 82.5 cm. Feb 06 2007 10:00AM (bravenec) Ron Bravenec Beam Emission Spectroscopy bravenec,rowan Bolometers yes Diode 2pi working fine, foil 2pi being low-pass filtered to remove noise. Outboard miidplane AXUV fine. Midplane foils working fine, but need to fill tree with calibrations. 2D AXUV arrays are being digitized but need further debugging and calibration. Dec 19 2007 07:16PM (mlreinke) Matt Reinke Bolometers hutch,mlreinke Boronization no First Boronization 5/9/07 Bottle has been removed from the cell Sep 14 2007 12:42PM (dekow) Jim Irby Boronization dekow,irby CNPA yes Single channel CNPA available as of 12/1707 Dec 17 2007 05:48PM (parker) Ron Parker Compact Neutral Analyzer parker Cryopump - Upper Divertor yes Cryopump is operational Dec 11 2007 10:13AM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard CXRS yes The pedestal toroidal array was installed, spatially and absolutely calibrated. There are 10 chords intersect the beam at the major_R_range=[74.2:86.3]cm. Spatial resolution: 1.2 cm. The F-top poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[67.8:91.0]cm. Spatial resolution: 1.22 cm. Nov 27 2007 10:21AM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,rachmcd,rowan D Alpha yes \ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are available Nov 26 2007 04:23PM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe Dalsa yes optics repaired, camera re-installed, and view has been re-calibrated Nov 27 2007 09:54AM (marmar) Earl Marmar Visible Bremsstrahlung marmar Disruption Mitigation no   Nov 20 2007 10:47PM (granetz) Robert Granetz Gas Jet granetz,whyte Divertor IR no   Mar 06 2007 10:50AM  Glen Wurden Divertor IR Digital Video gwurden,terry Divertor IR Spectroscopy no   Mar 06 2007 10:51AM  Glen Wurden Divertor IR Spectroscopy gwurden,terry DNB no   Nov 20 2007 10:47PM (granetz) Robert Granetz Diagnostic Neutral Beam beals,granetz FRC-ECE 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 Starting on 1080227 All low freq. channels have been connected 50,60,75,88, 88l,88u and 110GHz. The variable freq. channel as well as the 140 have been connected and are being tested. (On 1080306, 75GHz has been disconnected because the rcvr mixer has been obsolete for the last run days) Mar 06 2008 09:11AM (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 YAG2 on polychromator 1~8. YAG1 is not calibrated yet. Density calibration hasn't been performed on ploychromator 9~16. Feb 21 2008 11:19AM (yma) Jerry Hughes Core Thomson scattering jwhughes,yma TS - Edge yes System is working. Density is derived with last year's calibration, and should be good to within ~20%. Jan 18 2008 07:27AM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf XTOMO yes system operational Jan 10 2008 11:41AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke