Miniproposals

Miniproposal: 319 Date Filed: 8/22/2002 Title: Experimental/Theoretical Comparisons of SOL Turbulence in Alcator C-Mod First Author: Jim Terry Session Leader: Jim Terry (shots 1-28)

Engineering Operator Run Comment

MP 319: SOL Turbulence. J.Terry/R.Granetz

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:30:523PM

Author: To Be Determined

MP# 319 - Experimental/Theoretical Comparisons of SOL Turbulence in Alcator C-Mod In this set of SOL turbulence experiments we desire to 1) investigate the B scaling of the turbulence at two different fields for shots with good scanning probe profiles, 2) vary the outer gap to see if the gap influences the dynamics of the turbulence, 3) change and measure the characteristic density scrape-off lengths in the near SOL by operating at low (n/n_{GW} ~0.2) and high (n/n_{GW} ~0.6) density and observe any changes in k-spectrum or turbulence dynamics, 4) change the characteristic density scrape-off length in the near SOL by operating first in L- and then in H-mode and observe any changes in k-spectrum or turbulence dynamics, (using Ohmic H-mode so that scanning probe profiles are possible), Desired diagnostics: ASP ISP Gas puff imaging fast diodes - inner and outer wall fast diodes looking at Kaiser 6 Kaiser 9 inner SOL D Gas puff imaging Xybion camera PSI-IV movie camera BES reflectometer Edge pedestal diagnostics Z meter Part 1 - 4 shots at Bt=6.0 T, Ip=1 MA, NL-04=7.5e19, outer gap between 1. and 1.5 cm - scan ASP and ISP - NINJA puffing D_2 from inside and outside midplane. This is n/n_GW=0.2. RESULT: These plasmas looked less turbulent than the the ones at higher n/n_GW. RESULT: Got Ohmic H-modes at 6T, 1 MA Shots 006 and 012. WHY? Part 2 - 4 shots at Bt=6.0 T, Ip=1 MA, NL-04=7.5e19, with outer gap around 2.0 cm - scan ASP and ISP - NINJA puffing D_2 from inside and outside midplane. This is n/n_GW=0.2. RESULT: No obvious difference in the turbulence characteristics with larger outer gap, but must await more detailed analysis. Part 3 - 4 shots with Bt ramped down to 2.6 T, Ip=0.43 MA, NL-04=7.0e19 - scan ASP and ISP - This is n/n_GW=0.5 NINJA puffing D_2 from inside and outside midplane. RESULT: Turbulence is clearly increased, perhaps due to n/n_GW rather than Bt Part 4 - 4 shots at Bt=5.4 and 6.0 T but with Ip rampdown so that n/n_GW=0.5. - scan ASP and ISP - NINJA puffing D_2 from inside and outside midplane. RESULT: Turbulence structure appears to be more dependent upon n/n_GW rather than Bt. RESULT: With Bt at 5.4 T and n/n_GW greater than 0.45 we got an upper chamber detatchment-MARFE with good plasma fueling. (shots 018 and 021) The emission is significantly further inside of what it should be based on the EFIT outer gap. This implies that these upper chamber detatchment-MARFEs have a much colder edge. The occurrance of a MARFE at this field contrasts to the cases (014-017) with Bt=2.6 T and n/n_GW=0.5 which had no upper chamber MARFE. Part 5 - 5 shots of Ohmic H-mode - scan ASP and ISP - NINJA puffing D_2 from inside and outside midplane. RESULT: Turbulent images were different during the ELM-free H-modes. They were narrower. Nonetheless, blobs were still clearly seen (shot 027 on PSI camera) Best PSI movie shots were 013,014,017,019,021,026 (during H-mode),027 (during H-mode),028 Shot by Shot list: shots 001-003 were shot cycle tests Part 1 [shots 006-009] - Bt=6T, Ip=1 MA, n/n_Gw=0.2, outer gap~1.2 cm 004 - disrupted at 0.9 s NINJA puffing He, not D_2 - a goof by me. 005 - good , as requested NINJA puff outboard D_2@.7 - 405 mTorr good Xybion data PSI ARMED and triggered, but no output strobes at the trigger time and no data ASP scans ISP scans outer gap going from 1.2 cm to 1.0 cm 006 - good , as requested NINJA puff outboard and inboard D_2@.7 - 405 mTorr inboard puff must have been too short - not seen good Xybion data good PSI data ASP scans ISP scans outer gap still going from 1.2 cm to 1.0 cm Ohmic H-mode at 6 T starting at 1.42 s !!!!! 007 - good , as requested NINJA puff outboard and inboard D_2@.7 - 405 mTorr inboard puff seen good Xybion data good PSI data ASP scans ISP scans outer gap at 1.2 cm 008 - good , as requested NINJA puff outboard and inboard D_2@.7 - 400 mTorr inboard puff seen good Xybion data good PSI data ASP scans ISP scans outer gap at 1.2 cm 009 - good , as requested NINJA puff outboard and inboard D_2@.7 & .75 - 400 mTorr inboard puff seen good Xybion data good PSI data ASP scans in to where fluctuations get smaller ISP scans outer gap at 1.2 cm Part 2 [Shots 010-012] same as Part 1, but with larger outer gap 010 - now go to 2.0 cm outer gap good , outer gap is 1.8 cm, otherwise as requested NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI data ASP scans in to where fluctuations get smaller ISP scans outer gap at 1.8 cm 011 - good , as requested NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI data ASP scans ISP scans outer gap at 2.0-2.1cm disrupted at 1.5 cm 012 - good , as requested NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI data ASP scans ISP scans outer gap at 2.0cm Ohmic H-mose at 1.33 sec Part 3 [Shots 013-017] Hold q constant but go to lower Bt (2.6 T). This means Ip is 0.43 MA and n/n_GW (for nl-04=7e19)=0.5. Observe SOL scale lengths and turbulence characteristics. 013 - now go to low Bt shot good , as requested although reached 2.6 T at 1.3 s NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI data - clear blob ASP scans ISP scans outer gap at 1.0cm inner gap 2 cm MARFE around 1 sec 014 - good , as requested although reached 2.7 T at 1.2 s NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI data - clear blob ASP scans ISP scans outer gap at 1.6 cm inner gap 1.4 to 1.1 cm MARFE around .9 sec images are clearly more bloby for these lower field, higher N/N_GW plasmas 015 - repeat - good , as requested, reached 2.6 T at 1.2 s NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data missed the PSI ARM ASP scans ISP scans outer gap at 1.7 cm inner gap 1.4 to 0.9 cm MARFE around .9 sec images are clearly more bloby for these lower field, higher N/N_GW plasmas 016 - repeat - good , as requested, reached 2.6 T at 1.2 s NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data PSI images are black - reason unknown ASP scans ISP scans outer gap at 1.5 cm inner gap 1.4 to 0.9 cm MARFE around .9 sec images are clearly more bloby for these lower field, higher N/N_GW plasmas 017 - repeat - good , as requested, reached 2.6 T at 1.2 s NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI images - Great radial blob! ASP scans ISP scans outer gap at 1.5 cm inner gap 1.4 to 0.9 cm images are clearly more bloby for these lower field, higher N/N_GW plasmas Part 4 - [shots 018-024] same Ip downramp, but keep Bt high (5.4 or 6.0 T), so that n/n_GW~0.5 is comparable to Part 3 shots 018 - now go to Bt=5.4 T but with Ip still ramping down good, but detachment-MARFE at 0.9 sec NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen - big normalized fluctuations seen on inboard good Xybion data good PSI images ASP scans ISP scans outer gap at 1.6 cm (although appears to be inside of that according to the images) inner gap 1.3 to 0.8 cm 019 - Bt=5.4 T but with Ip still ramping down good shot, n/n_GW=.46 NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI images - great eddy movement ASP scans ISP scans outer gap at 1.5 cm inner gap 1.4 to 01.0 cm 020 - fizzle 021 - Bt=5.4 T but with Ip still ramping down detachment again, n/n_GW=.85 NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data - great images for frame 71,72 good PSI images ASP scans ISP scans outer gap at 1.6 cm Emission is much further in than it should be according to gap. This implies that the "detachment" has a much colder edge. inner gap 1.3 to 0.9 cm 022 - dud 023 - good shot, as requested, but Xybion data is lost no detatchment OK PSI data outer gap at 1.5 (although emission location is much further out than for 021) inner gap from 1.2 to 1.0 cm 024 - good shot raise field to 6 T, as requested, but Xybion data is lost no detatchment OK PSI data outer gap at 1.5 (although emission location is much further out than for 021) inner gap from 1.2 to 1.0 cm Part 5 - [Shots 025-028] Ohmic H-modes - compare the turbulence with differing SOL scale lengths (L-mode to H-mode) 025 - go to Ohmic H-mode good shot - ramp field to 3.6 T, as requested good Xybion data good PSI data many H-modes no H-mode at 0.8 H-mode at 1.0 H-mode at 1.2 inner gap at 1.8 cm outer gap at 1.2 cm 026 - go to Ohmic H-mode good shot - ramp field to 3.6 T, as requested good Xybion data good PSI data- blob seen many H-modes ISP scans ASP scans L-mode at 0.7 L-mode at 1.0 H-mode at 1.2 transition at 1.25 s inner gap at 1.3 cm outer gap at 1.8 cm 027 - go to Ohmic H-mode good shot - ramp field to 3.6 T, as requested good Xybion data good PSI data- blob during H-mode many H-modes ISP scans ASP scans H-mode at 0.8 (probe time) L-mode at 1.05 (probe time) H-mode at 1.2 (PSI time) transition at 1.3 (probe time) transition at 1.25 s inner gap at 1.3 cm outer gap at 1.8 cm 028 - go to Ohmic H-mode good shot - ramp field to 3.6 T, as requested NINJA pressure 560 Torr good Xybion data good PSI data- blob during L-mode many H-modes ISP scans ASP scans QC mode seen at 0.8 sec probe scan H-mode at 0.8 (probe time) L-mode at 1.05 (probe time) L-mode at 1.2 (PSI time) H-mode at 1.3 (probe time) inner gap at 1.3 cm outer gap at 1.8 cm

Physics Operator Summaries

Entered: Jul 7 2004 04:37:16:207PM

Author: To Be Determined

Physics operator summary for run 1020919 (Thursday): MP 319: SOL Turbulence Session leader: J. Terry Physics operator: R. Granetz Engineer in charge: Bill Cochran, Bill Byford, Bill Parkin Summary: The machine reliability was very good today, and we essentially got through the entire (very ambitious) run plan. The run plan required loading PCS with a number of shots from 2 years ago (which required CALL WIRE on the IP referenced wires), as well as a shot from one month ago. A number of different currents, fields, and densities were run, as well as all three scanning probes, and NINJA gas puffing from both the inboard and outboard walls. By the end of the run, all the different PCS programs were contained in the 4 different PCS segments, so if we ever need to run a similar MP again, the last shot would be a good one to load into PCS. Scorecard: 23 plasmas 1 fizzle 1 dud (no TF) 3 tests 0 aborted and/or screwed up by computer problems ---------- 28 total ------------------------------------------------------------------------------- Engineering setup for Thursday 19 Sept 2002 MP 319: SOL turbulence Session leader: J. Terry Physics operator: R. Granetz ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00. Bake at 60 C overnight as well. Set up for possible ECDC in D2 between shots (although this is unlikely today). Run begins at 09:00 and ends at 17:00. Power systems the same as shot 1000912012 (1.0 MA, 6.0 T, lower single null) Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) leave J-Bottom as is Hybrid DISABLED (PG5) Enable the following gate valves, assuming no vacuum problems: ECE, VUV, DNB ------------------------------------------------------------------------------- RF Setup: None, this will be an ohmic run. ------------------------------------------------------------------------------- Run Plan (from J.T.): (load shot 1000912012) 4 shots at $B_T$=6.0 T, $I_p$=1 MA, NL-04=7.5e19, outer gap between 1. and 1.5 cm - scan ASP and ISP - GPI systems puffing $D_2$ (NINJA @8 psi) from inside and outside midplane. This is $n/n_{GW}$=0.2. 4 shots at $B_T$=6.0 T, $I_p$=1 MA, NL-04=7.5e19, with outer gap around 2.5 cm - scan ASP and ISP - GPI systems puffing $D_2$ (NINJA pressure as necessary) from inside and outside midplane. This is $n/n_{GW}$=0.2. Decide whether larger gap makes a difference. If it does, then the rest of the shots will be run at large (~2 cm) outer gap. (load shot 1000912016) 4 shots with $B_T$ ramped down to 2.6 T, $I_p$=0.43 MA, NL-04=7.0e19 - scan ASP and ISP - This is $n/n_{GW}$=0.5 2 shots with GPI systems puffing $D_2$ (NINJA pressure ~8 psi) from inside and outside midplane. 2 shots with GPI systems puffing He (NINJA pressure ~10 psi) from inside and outside midplane. (load shot 1000912019) 4 shots at for density ramping to NL-04=1.5e20 This is $n/n_{GW}$=0.6. - scan ASP and ISP - GPI systems puffing He (NINJA pressure ~20 psi) from inside and outside midplane. (load 1020816009 but without the Bt up-ramp) 5 shots of Ohmic H-mode - scan ASP - GPI systems puffing $D_2$ (NINJA pressure ~20 psi) from inside and outside midplane. ------------------------------------------------------------------------------- ECDC was done overnight, as well as a bake at 60 C. Hybrid coldstart done; no errors found Loaded PCS segment 2 from shot 1000912012 (1 MA, 6.0 T, low density), and edited all the relevant wire algorithms (keeping the CLEARIN offset the same), since this shot was from two years ago. Loaded PCS segment 1 from a typical shot from yesterday. (Actually I did all this the night before today's run, and saved it in my scratch area, then reloaded it just before the run.) ------------------------------------------------------------------------------- Shot 01 -- Test. No power test shot to check MDSplus after some Linux cluster changes. No engineering data. Shot 02 -- Test. Confirm that bus Rogowski data works this time. Nope, it's still not working. The data are there with a manual test cycle of the engineering tree, but not with the CMOD MDS cycle. Shot 03 -- Test. OK, bus Rogowski data are there. Next shot: go for plasma Shot 04 -- Plasma. 1 MA, 6 T. Disrupted at t=0.90 s, due to an injection. The tile is showing up again very clearly down in the divertor, and may have caused the injection. Helium puff is seen on the inner wall, as is the F scanning probe. nl_04=7-7.5e19 m-2, and the outer gap is 1.2 cm, so all the parameters are as desired. Next shot: put a gradual ramp into the Btor increase at segment switch. Shot 05 -- Plasma. Good shot. 1 MA, 6.0 T, nl_04=7e19 m-2, outer gap starts at 1.2 cm, decreasing down to 1.0 cm. There are multiple impurity injections going on throughout the shot. All three scanning probes are going (F shows up great on wide2 view.) D2 was puffed through NINJA. Next shot: tweak RCUR to keep outer gap constant at 1.2 cm Shot 06 -- Plasma. Good shot. Outer gap hardly changed at all from the previous shot. There was an ohmic H-mode late in the shot. Next shot: tweak outer gap some more. Also reduce inner gap by 4 mm. Shot 07 -- Plasma. Good shot. Outer gap is pretty constant at 1.2 cm, and inner gap has decreased to 1.2-1.3 cm. Density is rising slightly during the shot. There were several impurity injections again. Next shot: reduce inner gap some more, without changing outer gap. Shot 08 -- Plasma. Good shot. Inner gap 1.1-1.0 cm. Outer gap=1.3 cm. Next shot: repeat, no changes There is a delay due to a problem getting necessary batch jobs done on the VUV queue. Tom Fredian is looking into it. Shot 09 -- Plasma. Good shot. H/D has been around 8% for the whole day so far. Next shot: increase the outer gap to 2.0 cm by reducing RCUR by 4 mm. Shot 10 -- Plasma. Good shot. Outer gap=1.8 cm. Inner gap remained at 1.1-1.0 cm Next shot: increase outer gap another 2 mm by reducing RCUR. Shot 11 -- Plasma. Good shot, became vertically unstable and disrupted at t=1.5 s. Outer gap=20 mm, elongation=1.7, n/ncrit=1.3 . Next shot: tweak the outer gap to start shrinking after t=1.2 s, so as to head off the VDE. Shot 12 -- Plasma. Good shot. Just barely remained stable; no disruption. Outer gap=20 mm. Next shot: change gears and load the low field shot: 1000912016 INTO SEGMENT 3 !! Disable segment 2. re-edit all the necessary wires, keeping the offsets the same. Also slow down the BTOR rampdown to just 75 kA/s, which reaches the desired 2.6 T at t=1.2 s. Shot 13 -- Plasma. Good shot. Ip=0.43 MA, Btor got down to 2.6 T around t=1.3 s. nl_04=7e19 m-2. Outer gap=1.0 cm, inner gap=2.0+ cm. There is a large marfe around t=1 s (also present in the shot from 2 years ago that we loaded in). Next shot: increase outer gap to 15 mm, reduce inner gap to 11 mm, ramp Btor slightly faster. Shot 14 -- Plasma. Good shot. 0.43 MA, 2.7 T (by about 1.2 s). Outer gap about 17 mm, inner gap=14-10 mm. Next shot: ramp Btor slightly faster still. Brian will move the plunge times of the probes to later in the shot. Shot 15 -- Plasma. Good shot. 0.43 MA, 2.7-2.6 T (by about 1.15 s). Outer gap and inner gap same as previous shot. H/D is around 6% Next shot: reduce outer gap by 2 mm. Shot 16 -- Plasma. Good shot. 0.43 MA, 2.7-2.6 T by about t=1.15 s. One of JT's cameras didn't work on this shot. Next shot: repeat with no changes, so JT has another chance to get the camera data. Shot 17 -- Plasma. Good shot. 0.43 MA, 2.7-2.6 T by about t=1.15 s. Jim's camera got the data. nl_04=7e19 m-2. Next shot: same, except keep the Btor constant at 5.35 T. Shot 18 -- Plasma. Good shot. 0.43 MA, 5.4 T (constant). There was a large marfe at the top of the machine. Outer gap=15 mm, inner gap=15-10 mm. Next shot: ramp Ip down to 0.5 MA, rather than 0.43 MA. Hopefully this will avoid the marfe. Shot 19 -- Plasma. Good shot. 0.51 MA, 5.4 T. Marfe is substantially reduced. nl_04=0.8e20 m-2. Next shot: increase density by 10% Shot 20 -- Fizzle. First one of the day. Everything looks identical to previous shots. Next shot: no PCS changes Shot 21 -- Plasma. Good shot. 0.51 MA, 5.4 T. Marfe came back, presumably due to the 10% increase in density. Next shot: decrease the density back to nl_04=0.7e20 m-2. Shot 22 -- Dud. No TF. Shot 23 -- Plasma. Good shot. 0.51 MA, 5.4 T, 0.7e20 m-2. No big marfe. Time to move on. Next shot: increase Btor to 6.0 T There is a delay here to solve a problem with data acquisition. It may be due to a full disk. Shot 24 -- Plasma. Good shot. 0.51 MA, 6.0 T, 0.7e20 m-2. No big marfe. Jim Terry may not have gotten data from one of his cameras. Next shot: go for ohmic H-mode. Load segment 3 from 1020816009 into segment 4 of today's setup. Turn on segment 4 and turn off segment 3. Eliminate the Btor upramp that had been programmed on the source shot. This will give us a Btor of 3.6 T, and Ip=0.8 MA, and hopefully an ohmic H-mode. Shot 25 -- Plasma. Good shot. Many short ELM-free H-modes. 0.76 MA, 3.65 T. All the probes scanned. Ninja puffed on the inboard wall. Next shot: reduce inner gap by 7 mm while keeping outer gap the same. Shot 26 -- Plasma. Good shot. 0.76 MA, 3.65 T. Many short ELM-free H-modes. Inner gap=13 mm. Outer gap=18 mm. Lots of good data. Next shot: no changes Shot 27 -- Plasma. Good shot. 0.76 MA, 3.65 T. Disrupted at 1.6 s. I_halo=130 kA. Next shot: repeat, no changes Shot 28 -- Plasma. Good shot. 0.76 MA, 3.65 T. Disrupted at 1.6 s. I_halo=126 kA. Great run...very productive! End of run.

Session Leader Comments
Sep 19 2002 09:33:37:473AM		Jim Terry	MP# 319 - Experimental/Theoretical Comparisons of SOL Turbulence in Alcator C-Mod In this set of SOL turbulence experiments we desire to 1) investigate the B scaling of the turbulence at two different fields for shots with good scanning probe profiles, 2) vary the outer gap to see if the gap influences the dynamics of the turbulence, 3) change and measure the characteristic density scrape-off lengths in the near SOL by operating at low (n/n_{GW} ~0.2) and high (n/n_{GW} ~0.6) density and observe any changes in k-spectrum or turbulence dynamics, 4) change the characteristic density scrape-off length in the near SOL by operating in first L- and then H-mode and observe any changes in k-spectrum or turbulence dynamics, (with Ohmic H-mode so that scanning probe profiles are possible), 5) measure the turbulence characteristics in EDA H-mode plasmas. Desired diagnostics: ASP ISP Gas puff imaging fast diodes - inner and outer wall fast diodes looking at Kaiser 8 Kaiser 9 inner SOL D Umd spectrometer looking at Kaiser 7 Kaiser 10 Kaiser 12 Inner SOL C Inner SOL E Gas puff imaging Xybion camera PSI-IV movie camera BES reflectometer Edge pedestal diagnostics Z meter Run plan today 1 - (load shot 1000912012) 4 shots at $B_T$=6.0 T, $I_p$=1 MA, NL-04=7.5e19, outer gap between 1. and 1.5 cm - scan ASP and ISP - GPI systems puffing $D_2$ (NINJA @8 psi) from inside and outside midplane. This is $n/n_{GW}$=0.2. 2 - 4 shots at $B_T$=6.0 T, $I_p$=1 MA, NL-04=7.5e19, with outer gap around 2.5 cm - scan ASP and ISP - GPI systems puffing $D_2$ (NINJA pressure as necessary) from inside and outside midplane. This is $n/n_{GW}$=0.2. Decide whether larger gap makes a difference. If it does, then the rest of the shots will be run at large (~2 cm) outer gap. 3 - (load shot 1000912016) 4 shots with $B_T$ ramped down to 2.6 T, $I_p$=0.43 MA, NL-04=7.0e19 - scan ASP and ISP - This is $n/n_{GW}$=0.5 2 shots with GPI systems puffing $D_2$ (NINJA pressure ~8 psi) from inside and outside midplane. 2 shots with GPI systems puffing He (NINJA pressure ~10 psi) from inside and outside midplane. 4 - (load shot 1000912019) 4 shots at for density ramping to NL-04=1.5e20 This is $n/n_{GW}$=0.6. - scan ASP and ISP - GPI systems puffing He (NINJA pressure ~20 psi) from inside and outside midplane. 5 - (load 1020816009 but without the Bt up-ramp) 5 shots of Ohmic H-mode - scan ASP - GPI systems puffing $D_2$ (NINJA pressure ~20 psi) from inside and outside midplane.
Sep 19 2002 10:01:22:423AM	1020919003	Jim Terry	shots 001-003 were shot cycle tests
Sep 19 2002 10:00:39:907AM	1020919004	Jim Terry	004 - 1st plasma attempt NINJA puff He@.7 s disrupted at .9 s no PSI
Sep 19 2002 10:30:31:987AM	1020919005	Jim Terry	005 - good , as requested NINJA puff outboard D_2@.7 - 405 mTorr good Xybion data PSI ARMED and triggered, but no output strobes at the trigger time and no data ASP scans ISP scans outer gap going from 1.2 cm to 1.0 cm
Sep 19 2002 10:55:27:133AM	1020919006	Jim Terry	006 - good , as requested NINJA puff outboard and inboard D_2@.7 - 405 mTorr inboard puff must have been too short - not seen good Xybion data good PSI data ASP scans ISP scans outer gap still going from 1.2 cm to 1.0 cm Ohmic H-mode at 6 T starting at 1.42 s!
Sep 19 2002 11:06:29:177AM	1020919007	Jim Terry	007 - good , as requested NINJA puff outboard and inboard D_2@.7 - 405 mTorr inboard puff seen good Xybion data good PSI data ASP scans ISP scans outer gap at1.2 cm
Sep 19 2002 11:51:29:533AM	1020919008	Jim Terry	008 - good , as requested NINJA puff outboard and inboard D_2@.7 - 400 mTorr inboard puff seen good Xybion data good PSI data ASP scans ISP scans outer gap at 1.2 cm
Sep 19 2002 11:52:43:037AM	1020919009	Jim Terry	009 - good , as requested NINJA puff outboard and inboard D_2@.7 & .75 - 400 mTorr inboard puff seen good Xybion data good PSI data ASP scans in to where fluctuations get smaller ISP scans outer gap at 1.2 cm
Sep 19 2002 12:40:00:540PM	1020919010	Jim Terry	010 - now go to 2.0 cm outer gap good , outer gap is 1.8 cm, otherwise as requested NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI data ASP scans in to where fluctuations get smaller ISP scans outer gap at 1.8 cm
Sep 19 2002 12:43:31:097PM	1020919011	Jim Terry	011 - good , as requested NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI data ASP scans ISP scans outer gap at 2.0-2.1cm disrupted at 1.5 cm
Sep 19 2002 01:01:00:627PM	1020919012	Jim Terry	012 - good , as requested NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI data ASP scans ISP scans outer gap at 2.0cm Ohmic H-mose at 1.33 sec
Sep 19 2002 01:00:02:403PM	1020919013	Jim Terry	013 - now go to low Bt shot good , as requested although reached 2.6 T at 1.3 s NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI data - clear blob ASP scans ISP scans outer gap at 1.0cm inner gap 2 cm MARFE around 1 sec
Sep 19 2002 01:20:38:670PM	1020919014	Jim Terry	014 - good , as requested although reached 2.7 T at 1.2 s NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI data - clear blob ASP scans ISP scans outer gap at 1.6 cm inner gap 1.4 to 1.1 cm MARFE around .9 sec images are clearly more bloby for these lower field, higher N/N_GW plasmas
Sep 19 2002 01:47:22:040PM	1020919015	Jim Terry	015 - repeat - good , as requested, reached 2.6 T at 1.2 s NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data missed the PSI ARM ASP scans ISP scans outer gap at 1.7 cm inner gap 1.4 to 0.9 cm MARFE around .9 sec images are clearly more bloby for these lower field, higher N/N_GW plasmas
Sep 19 2002 01:48:00:213PM	1020919016	Jim Terry	016 - repeat - good , as requested, reached 2.6 T at 1.2 s NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data PSI images are black - reason unknown ASP scans ISP scans outer gap at 1.5 cm inner gap 1.4 to 0.9 cm MARFE around .9 sec images are clearly more bloby for these lower field, higher N/N_GW plasmas
Sep 19 2002 03:03:36:437PM	1020919017	Jim Terry	017 - repeat - good , as requested, reached 2.6 T at 1.2 s NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI images - Great radial blob! ASP scans ISP scans outer gap at 1.5 cm inner gap 1.4 to 0.9 cm images are clearly more bloby for these lower field, higher N/N_GW plasmas
Sep 19 2002 02:25:22:190PM	1020919018	Jim Terry	018 - now go to Bt=5.4 T but with Ip still ramping down good, but detachment-MARFE at 0.9 sec NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen - big fluctuations seen on inboard good Xybion data good PSI images ASP scans ISP scans outer gap at 1.6 cm inner gap 1.3 to 0.8 cm
Sep 19 2002 03:08:15:633PM	1020919019	Jim Terry	019 - Bt=5.4 T but with Ip still ramping down good shot, n/n_GW=.46 NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data good PSI images - great eddy movies ASP scans ISP scans outer gap at 1.5 cm inner gap 1.4 to 01.0 cm
Sep 19 2002 02:50:43:497PM	1020919020	Jim Terry	020 - fizzle
Sep 20 2002 10:06:32:280AM	1020919021	Jim Terry	021 - Bt=5.4 T but with Ip still ramping down detachment again, n/n_GW=.85 NINJA puff outboard and inboard D_2@.7 & .74 - 400 mTorr inboard puff seen good Xybion data - great images for frame 71,72 good PSI images ASP scans ISP scans outer gap at 1.6 cm Emission is much further in than it should be according to gap. This implies that the "detachment" has a much colder edge. inner gap 1.3 to 0.9 cm
Sep 19 2002 03:27:19:193PM	1020919022	Jim Terry	022 - dud
Sep 20 2002 10:03:21:947AM	1020919023	Jim Terry	023 - good shot, as requested, but Xybion data is lost no detatchment OK PSI data outer gap at 1.5 (although emission location is much further out than for 021) inner gap from 1.2 to 1.0 cm
Sep 19 2002 04:23:22:863PM	1020919024	Jim Terry	024 - good shot raise field to 6 T, as requested, but Xybion data is lost no detatchment OK PSI data
Sep 19 2002 04:30:02:967PM	1020919025	Jim Terry	025 - go to Ohmic H-mode good shot - ramp field to 3.6 T, as requested good Xybion data good PSI data many H-modes no H-mode at 0.8 H-mode at 1.0 H-mode at 1.2 inner gap at 1.8 cm outer gap at 1.2 cm
Sep 19 2002 04:51:39:657PM	1020919026	Jim Terry	026 - go to Ohmic H-mode good shot - ramp field to 3.6 T, as requested good Xybion data good PSI data many H-modes ISP scans ASP scans L-mode at 0.7 L-mode at 1.0 H-mode at 1.2 transition at 1.25 s inner gap at 1.3 cm outer gap at 1.8 cm
Sep 19 2002 05:06:56:760PM	1020919027	Jim Terry	027 - go to Ohmic H-mode good shot - ramp field to 3.6 T, as requested good Xybion data good PSI data- blob during H-mode many H-modes ISP scans ASP scans H-mode at 0.8 (probe time) L-mode at 1.05 (probe time) H-mode at 1.2 (PSI time) transition at 1.3 (probe time) transition at 1.25 s inner gap at 1.3 cm outer gap at 1.8 cm
Sep 19 2002 05:11:35:673PM	1020919028	Jim Terry	028 - go to Ohmic H-mode good shot - ramp field to 3.6 T, as requested NINJA pressure 560 Torr good Xybion data good PSI data- blob during L-mode many H-modes ISP scans ASP scans QC mode seen at 0.8 sec probe scan H-mode at 0.8 (probe time) L-mode at 1.05 (probe time) L-mode at 1.2 (PSI time) H-mode at 1.3 (probe time) inner gap at 1.3 cm outer gap at 1.8 cm

Physics Operator Comments
Sep 18 2002 04:57:08:920PM		Robert Granetz	Engineering setup for Thursday 19 Sept 2002 MP 319: SOL turbulence Session leader: J. Terry Physics operator: R. Granetz ECDC overnight in D2 at 2e-4 Torr, stopping by 07:00. Bake at 60 C overnight as well. Set up for possible ECDC in D2 between shots (although this is unlikely today). Run begins at 09:00 and ends at 17:00. Power systems the same as shot 1000912012 (1.0 MA, 6.0 T, lower single null) Gas setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid enabled (PG1) fill B-side upper with 10 psi D2 Hybrid DISABLED (PG2) (for ECDC) fill C-side with 30 psi D2 Hybrid enabled (PG3) leave J-Bottom as is Hybrid DISABLED (PG5) Enable the following gate valves, assuming no vacuum problems: ECE, VUV, DNB ------------------------------------------------------------------------------- RF Setup: None, this will be an ohmic run. ------------------------------------------------------------------------------- Run Plan (from J.T.): (load shot 1000912012) 4 shots at $B_T$=6.0 T, $I_p$=1 MA, NL-04=7.5e19, outer gap between 1. and 1.5 cm - scan ASP and ISP - GPI systems puffing $D_2$ (NINJA @8 psi) from inside and outside midplane. This is $n/n_{GW}$=0.2. 4 shots at $B_T$=6.0 T, $I_p$=1 MA, NL-04=7.5e19, with outer gap around 2.5 cm - scan ASP and ISP - GPI systems puffing $D_2$ (NINJA pressure as necessary) from inside and outside midplane. This is $n/n_{GW}$=0.2. Decide whether larger gap makes a difference. If it does, then the rest of the shots will be run at large (~2 cm) outer gap. (load shot 1000912016) 4 shots with $B_T$ ramped down to 2.6 T, $I_p$=0.43 MA, NL-04=7.0e19 - scan ASP and ISP - This is $n/n_{GW}$=0.5 2 shots with GPI systems puffing $D_2$ (NINJA pressure ~8 psi) from inside and outside midplane. 2 shots with GPI systems puffing He (NINJA pressure ~10 psi) from inside and outside midplane. (load shot 1000912019) 4 shots at for density ramping to NL-04=1.5e20 This is $n/n_{GW}$=0.6. - scan ASP and ISP - GPI systems puffing He (NINJA pressure ~20 psi) from inside and outside midplane. (load 1020816009 but without the Bt up-ramp) 5 shots of Ohmic H-mode - scan ASP - GPI systems puffing $D_2$ (NINJA pressure ~20 psi) from inside and outside midplane.
Sep 19 2002 08:35:37:320AM		Robert Granetz	ECDC was done overnight, as well as a bake at 60 C. Hybrid coldstart done; no errors found Loaded PCS segment 2 from shot 1000912012 (1 MA, 6.0 T, low density), and edited all the relevant wire algorithms (keeping the CLEARIN offset the same), since this shot was from two years ago. Loaded PCS segment 1 from a typical shot from yesterday. (Actually I did all this the night before today's run, and saved it in my scratch area, then reloaded it just before the run.)
Sep 19 2002 08:53:27:273AM	1020919001	Robert Granetz	Shot 01 -- Test. No power test shot to check MDSplus after some Linux cluster changes. No engineering data.
Sep 19 2002 09:04:00:850AM	1020919002	Robert Granetz	Shot 02 -- Test. Confirm that bus Rogowski data works this time. Nope, it's still not working. The data are there with a manual test cycle of the engineering tree, but not with the CMOD MDS cycle.
Sep 19 2002 09:43:30:517AM	1020919003	Robert Granetz	Shot 03 -- Test. OK, bus Rogowski data are there. Next shot: go for plasma
Sep 19 2002 10:10:32:247AM	1020919004	Robert Granetz	Shot 04 -- Plasma. 1 MA, 6 T. Disrupted at t=0.90 s, due to an injection. The tile is showing up again very clearly down in the divertor, and may have caused the injection. Helium puff is seen on the inner wall, as is the F scanning probe. nl_04=7-7.5e19 m-2, and the outer gap is 1.2 cm, so all the parameters are as desired. Next shot: put a gradual ramp into the Btor increase at segment switch.
Sep 19 2002 10:30:33:423AM	1020919005	Robert Granetz	Shot 05 -- Plasma. Good shot. 1 MA, 6.0 T, nl_04=7e19 m-2, outer gap starts at 1.2 cm, decreasing down to 1.0 cm. There are multiple impurity injections going on throughout the shot. All three scanning probes are going (F shows up great on wide2 view.) D2 was puffed through NINJA. Next shot: tweak RCUR to keep outer gap constant at 1.2 cm
Sep 19 2002 10:52:44:687AM	1020919006	Robert Granetz	Shot 06 -- Plasma. Good shot. Outer gap hardly changed at all from the previous shot. There was an ohmic H-mode late in the shot. Next shot: tweak outer gap some more. Also reduce inner gap by 4 mm.
Sep 19 2002 11:34:07:500AM	1020919008	Robert Granetz	Shot 08 -- Plasma. Good shot. Inner gap 1.1-1.0 cm. Outer gap=1.3 cm. Next shot: repeat, no changes There is a delay due to a problem getting necessary batch jobs done on the VUV queue. Tom Fredian is looking into it.
Sep 19 2002 11:50:07:390AM	1020919009	Robert Granetz	Shot 09 -- Plasma. Good shot. H/D has been around 8% for the whole day so far. Next shot: increase the outer gap to 2.0 cm by reducing RCUR by 4 mm.
Sep 19 2002 12:04:34:427PM	1020919010	Robert Granetz	Shot 10 -- Plasma. Good shot. Outer gap=1.8 cm. Inner gap remained at 1.1-1.0 cm Next shot: increase outer gap another 2 mm by reducing RCUR.
Sep 19 2002 12:20:59:393PM	1020919011	Robert Granetz	Shot 11 -- Plasma. Good shot, became vertically unstable and disrupted at t=1.5 s. Outer gap=20 mm, elongation=1.7, n/ncrit=1.3 . Next shot: tweak the outer gap to start shrinking after t=1.2 s, so as to head off the VDE.
Sep 19 2002 01:01:29:347PM	1020919012	Robert Granetz	Shot 12 -- Plasma. Good shot. Just barely remained stable; no disruption. Outer gap=20 mm. Next shot: change gears and load the low field shot: 1000912016 INTO SEGMENT 3 !! Disable segment 2. re-edit all the necessary wires, keeping the offsets the same. Also slow down the BTOR rampdown to just 75 kA/s, which reaches the desired 2.6 T at t=1.2 s.
Sep 19 2002 01:00:00:750PM	1020919013	Robert Granetz	Shot 13 -- Plasma. Good shot. Ip=0.43 MA, Btor got down to 2.6 T around t=1.3 s. nl_04=7e19 m-2. Outer gap=1.0 cm, inner gap=2.0+ cm. There is a large marfe around t=1 s (also present in the shot from 2 years ago that we loaded in). Next shot: increase outer gap to 15 mm, reduce inner gap to 11 mm, ramp Btor slightly faster.
Sep 19 2002 01:18:29:093PM	1020919014	Robert Granetz	Shot 14 -- Plasma. Good shot. 0.43 MA, 2.7 T (by about 1.2 s). Outer gap about 17 mm, inner gap=14-10 mm. Next shot: ramp Btor slightly faster still. Brian will move the plunge times of the probes to later in the shot.
Sep 19 2002 01:34:14:067PM	1020919015	Robert Granetz	Shot 15 -- Plasma. Good shot. 0.43 MA, 2.7-2.6 T (by about 1.15 s). Outer gap and inner gap same as previous shot. H/D is around 6% Next shot: reduce outer gap by 2 mm.
Sep 19 2002 01:46:05:757PM	1020919016	Robert Granetz	Shot 16 -- Plasma. Good shot. 0.43 MA, 2.7-2.6 T by about t=1.15 s. One of JT's cameras didn't work on this shot. Next shot: repeat with no changes, so JT has another chance to get the camera data.
Sep 19 2002 02:01:39:750PM	1020919017	Robert Granetz	Shot 17 -- Plasma. Good shot. 0.43 MA, 2.7-2.6 T by about t=1.15 s. Jim's camera got the data. nl_04=7e19 m-2. Next shot: same, except keep the Btor constant at 5.35 T.
Sep 19 2002 02:19:54:793PM	1020919018	Robert Granetz	Shot 18 -- Plasma. Good shot. 0.43 MA, 5.4 T (constant). There was a large marfe at the top of the machine. Outer gap=15 mm, inner gap=15-10 mm. Next shot: ramp Ip down to 0.5 MA, rather than 0.43 MA. Hopefully this will avoid the marfe.
Sep 19 2002 02:34:20:453PM	1020919019	Robert Granetz	Shot 19 -- Plasma. Good shot. 0.51 MA, 5.4 T. Marfe is substantially reduced. nl_04=0.8e20 m-2. Next shot: increase density by 10%
Sep 19 2002 03:00:00:480PM	1020919021	Robert Granetz	Shot 21 -- Plasma. Good shot. 0.51 MA, 5.4 T. Marfe came back, presumably due to the 10% increase in density. Next shot: decrease the density back to nl_04=0.7e20 m-2.
Sep 19 2002 03:11:47:357PM	1020919022	Robert Granetz	Shot 22 -- Dud. No TF.
Sep 19 2002 03:38:39:137PM	1020919023	Robert Granetz	Shot 23 -- Plasma. Good shot. 0.51 MA, 5.4 T, 0.7e20 m-2. No big marfe. Time to move on. Next shot: increase Btor to 6.0 T There is a delay here to solve a problem with data acquisition. It may be due to a full disk.
Sep 19 2002 04:07:04:900PM	1020919024	Robert Granetz	Shot 24 -- Plasma. Good shot. 0.51 MA, 6.0 T, 0.7e20 m-2. No big marfe. Jim Terry may not have gotten data from one of his cameras. Next shot: go for ohmic H-mode. Load segment 3 from 1020816009 into segment 4 of today's setup. Turn on segment 4 and turn off segment 3. Eliminate the Btor upramp that had been programmed on the source shot. This will give us a Btor of 3.6 T, and Ip=0.8 MA, and hopefully an ohmic H-mode.
Sep 19 2002 04:29:14:920PM	1020919025	Robert Granetz	Shot 25 -- Plasma. Good shot. Many short ELM-free H-modes. 0.76 MA, 3.65 T. All the probes scanned. Ninja puffed on the inboard wall. Next shot: reduce inner gap by 7 mm while keeping outer gap the same.
Sep 19 2002 04:42:11:610PM	1020919026	Robert Granetz	Shot 26 -- Plasma. Good shot. 0.76 MA, 3.65 T. Many short ELM-free H-modes. Inner gap=13 mm. Outer gap=18 mm. Lots of good data. Next shot: no changes
Sep 19 2002 05:04:50:537PM	1020919027	Robert Granetz	Shot 27 -- Plasma. Good shot. 0.76 MA, 3.65 T. Disrupted at 1.6 s. I_halo=130 kA. Next shot: repeat, no changes
Sep 19 2002 05:05:32:037PM	1020919028	Robert Granetz	Shot 28 -- Plasma. Good shot. 0.76 MA, 3.65 T. Disrupted at 1.6 s. I_halo=126 kA. Great run...very productive! End of run.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:48:39:917AM	Test	Bad	Camac Test _ No Rog. Data
2	09:00:23:277AM	Test	Bad	Camac Test_ No Rog. Data again
3	09:31:11:217AM	Test	Ok	Camac Test
4	09:45:53:040AM	Plasma	Ok
5	10:11:24:077AM	Plasma	Ok
6	10:34:19:060AM	Plasma	Ok
7	10:54:46:083AM	Plasma	Ok
8	11:10:30:673AM	Plasma	Ok
9	11:37:06:320AM	Plasma	Ok
10	11:53:32:430AM	Plasma	Ok
11	12:09:21:957PM	Plasma	Ok
12	12:24:22:823PM	Plasma	Ok
13	12:43:47:890PM	Plasma	Ok
14	01:00:31:373PM	Plasma	Ok
15	01:22:03:610PM	Plasma	Ok
16	01:36:38:880PM	Plasma	Ok
17	01:50:57:123PM	Plasma	Ok
18	02:04:10:487PM	Plasma	Ok
19	02:25:25:330PM	Plasma	Ok
20	02:40:17:480PM	Plasma	Ok
21	02:54:00:173PM	Plasma	Ok
22	03:08:17:087PM	Plasma	Ok
23	03:23:45:767PM	Plasma	Ok
24	03:49:22:187PM	Plasma	Ok
25	04:12:52:613PM	Plasma	Ok
26	04:30:16:640PM	Plasma	Ok
27	04:43:26:503PM	Plasma	Ok
28	04:56:43:320PM	Plasma	Ok