Miniproposals

Miniproposal: Date Filed: Title: First Author: Session Leader: Bruce Lipschultz (shots 1-37) Session Leader: Gary McCracken (shots 1-37)

Engineering Operator Run Comment

Wolfe/Silva

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:12:290PM

Author: To Be Determined

RUN_SUMMARY_950217.TXT Engineering operator: F. Silva/J Daigle Physics operator S. Wolfe Session Leader G. McCracken & B. Lipschultz This run was for mini-proposal #87, Impurity Transport using Non-recycling Impurities. Specifically in this run we used N2 to: 1) Study trace impurity screening for comparison to recycling impurities (Ar, Ne); and 2) raise the N2 levels to try and maximize the impurity radiation in the SOL relative to that in the core plasma. Overall it was a very interesting study. It was soon observed that the N2 acted like a non-recycling impurity, decaying very rapidly after a short gas injection pulse and increasing to a constant value with a continuous pulse. Initially , using gas puffing rates comparable with those used with neon injection, it was very difficult to see the spectroscopic lines in the plasma either on the oma (visible) or the McPherson. There was also little indication of an increase in the radiation either in the core plasma or the divertor. We increased the amount injected by a large factor and gradually the signals began to emerge from the noise. The main lines used were NII (399.5 nm) on the oma and Li-like (20.87 nm), He-like and H-like lines on the McPherson. It was quite clear that large amounts of N2 were being injected because the mass 14 and 28 were appearing on the RGA after the shot. Typically if there was a fizzle the pressure would rise to a partial pressure of 1e-6 torr and if there was plasma it would rise to 1e-7 torr.(gauge reading, no calibration available). Thus it was clear that the N2 was being trapped in the walls somewhere. This trend became clearer as the day progressed, for the background rose steadily. Towards the end of the day there were significant spectroscopic peaks in shots where no N2 was injected. Nevertheless the main plasma radiation did not increase by more than.~100 kW. It will be important to monitor the decay of these lines if they are still there when we resume operation after the break. Shots 004 to 014 used a short N2 puff through the B-side upper piezo valve. Conditions: plenum pressure 5 psi, pulse length 40 ms at 0.6 s (from shot 007). A small density scan was done from nel04 = 0.88e20 to 1.48e20 m^-2 For shots 015 thru 031 we used the NINJA system puffing at different poloidal positions through the capillaries. The positions were : the inner wall at midplane (valve B16-001), the private flux zone (B29-016), the outer wall (B33-001), and, for 1 shot, the outer SOL (B31-086). The N2 lines were more difficult to distinguish from the background in this case because the impurity influx rises more gradually then for the piezo valve and then remains roughly constant for the rest of the shot. We raised the plenum pressure from 55 torr on the first shots to 220 torr on shot 023 and then to 360 torr on shot 025. The plasma density was constant at 1.05e20 m^-2. With these high N2 puffs there was a clear indication of increased radiation on the divertor bolometers. We should look carefully at this to see if we can distinguish between the N2 radiation patteren with that previously obtained in neon In shots 032 and 033 we returned to the B-side upper valve and puffed continuously from 0.6 0.8 s with a plenum pressure of 7 psi. The N signal came quickly to a constant equilibrium level. The fast scanning probe took data at 3 times in most shots. Insome shots we got the abrupt detachment of all probes below the nosethat was observed last June. One particularly interesting observation, from the wide angle CCD camera at A-port, was a plume of visible radiation from the inner wall when we puffed N2 there. The plume followed field lines around the inner wall in one direction only. This indicates that there is strong plasma flow towards the divertor dragging the low charge state impurity ions. Although we had no interference filter on the camera it also indicates that the neutral lines must be of much lower intensity than those from the ions. In contrast when we puffed H2 at the same position we saw only a diffuse blob, presumably due to the Halpha from neutral hydrogen. At the end, the engineers kindly agreeing to stay late, we managed to get 2 N2 gas calibration shots for the B-side valve and a number of calibration shots with the NINJA system. These included a cross calibration of the ratiomatic to the MKS gauges for nitrogen, giving us a good absolute measure of the number of gas molecules injected for most of the shots As an aside it is worth emphasizing that the RGA data is very useful for studying overal particle inventory, both impurity and main species. We can now record mass 1 to 4 every 30 s for 10 mins and transfer it to the vax. This was used for the isotope exchange experiment (950216). We should make a determined effort to enable this datato be recorded for any arbitrary mass. Shot summary shots 1&2: power tests shot 3: 800 kA, nl04=1.25e20. Sweeping of strike point in region of probe 2 of outer divertor. shot 4: Good, N2 puff,20 ms at 0.5 s, oma lamda=399.5 nm,NII, Moly monitor on. shot 5: Good, N2 puff,20 ms at 0.5 s. oma lamda=348 nm,NIV, nl04 lowered to 1.1e20.. Probe scans at 0.6, 0.75, 0.9 seconds. MacPherson was on and viewing. When the strike point is sweeping we see a very narrow pressure peak (1-2 mm) move around the divertor plate. This peak corr. to rho=1-2 mm in midplane radius. It is a factor of 2-5 larger magnitude than surrounding probe ,measurements. shot 6: Good, N2 puff,40 ms at 0.79 s. oma,NII, We see the N-II in the divertor and Li-like N in the main plasma. It appears that the decay in the main plasma may be faster than in the divertor. shot 7: Good, N2 puff,40 ms at 0.6 s. oma lamda=348 nm There is perhaps a small effect on the H-port H-alpha. shot 8: Good, N2 puff,40 ms at 0.6 s, oma lamda=399.5 nm,NII, on this and all subsequent shots. shot 9: Good, N2 puff,40 ms at 0.6 s. nl04=1.3e20. The N-II background signal appears to be creeping up in the divertor. shot 10: Go0d, repeat for McPherson,no changes shot 11: baseline (no N2 puff). nl04=1.3e20. shot 12: Good, N2 puff,40 ms at 0.6 s. nl04=1.5e20. shot 13: power supply problem - disruption at 0.4 sec. shot 14: Good, N2 puff,40 ms at 0.6 s. nl04=0.9e20. 2 injections of molybdenum at .7 and .88 sec. Change to NINJA gas puff, plenum pressure 55 torr shot 15: Good, N2 puff in Private flux zone(B26-019), trigger 0.0 s, nl04=1.1e20. No effect on central plasma - no seen spectroscopically in either the divertor or main plasmas. shot 16: Good, N2 puff inner wall midplane, (B16-001), trigger 0.0 s shot 17: Good, N2 puff inner wall midplane, (B16-001), trigger -0.2 s This puff showed up clearly on the A-port video. shot 18: Background, No N2 puff. NL04=1.1e20. shot 19: Good, N2 puff in Private flux zone. Plenum pressure 108 torr, trigger -0.2 s Still no particular effect. shot 20: Good, N2 puff from the outer wall. (B33-001).Plenum pressure 108 torr, trigger -0.2 s Still no significant effect. shot 21: Fizzle, maybe too much N2. shot 22: Good, no N2 . shot 23: Good, N2 puff from the outer wall, .Plenum pressure 220 torr,trigger at 0.0 s (instead of -0.2). We are getting an effect on the spectroscopy signals. The central plasma level is ~ constant during the shot while the divertor N-II signal increases like t^2; perhaps the N2 is accumulating in the divertor. shot 24: Good, N2 puff in Private flux zone. .Plenum pressure 225 torr,trigger at 0.0 s Less effect for the main plasma than shot 23. 60kW Rf pulse during this shot; higher values after 0.9 sec. shot 25: Good, N2 puff in Private flux zone. Plenum pressure 360 torr,trigger at +0.2 s There is a large increase in the divertor radiation and some rearrangement at ~ 0.6 sec of the divertor profile . shot 26: fizzle shot 27: Good, N2 puff inner wall, Plenum 355 torr,trigger at +0.2 s shot 28: fizzle shot 29: Good, N2 puff from the outer wall,. Plenum 355 torr,trigger at +0.2 s shot 30: fizzle shot 31: Good, N2 puff from the outer SOL,. Plenum 350 torr,trigger at +0.2 s. Same odd occurence at ~ 600 ms. John G. has analyzed shot 27 and it appears that the radiation is peaked inside the separatrix before 600 ms. After the 'rearrangement' of the plasma in the divertor the radiation shifts outside the separatrix to the inner nose region. Change to B-side upper gas puff, plenum pressure 7psi , longer pulse shot 32: Good, N2 puff, 200 ms at 0.6 s We get a 'classic' fast detachment at 700 ms, 100 ms after the N2 puff starts. The central density then takes off. Interestingly enough the central radiated power increases immediately. Jim Terry reports that the N levels in the main plasma rise immediately and then rise again after detachment. The N levels then drop immediately with the close of the valve shot 33: Good, N2 puff, 200 ms at 0.6 s, lower density (nl04=0.9e20). No detachment although it looks like the main plasma heats during the N2 puff. shot 34: Background shot, no N2 puff, nl04=0.9e20. Gas Calibration only shot 35: N2 puff,B-side upper piezo, 200 ms at 0.6 s, Plenum pressure 5 psi shot 36: N2 puff,B-side upper piezo, 40 ms at 0.5 s, Plenum pressure 5 psi shot 37: D2 puff, A side piezo, Plenum pressure 18 psi, gas profile of shot 950207023, deuterium calibration for Artur. NINJA, Calibration, Trigger 0.0 s for 0.1 s shot 501: B26-019, Plenum pressure 346 torr shot 502: B16-001, Plenum pressure 345 torr shot 503: B33-001, Plenum pressure 346 torr shot 504: B31-086, Plenum pressure 344 torr shot 505: B33-001, Plenum pressure 233 torr shot 506: B26-019, Plenum pressure 233 torr shot 507: B26-019, Plenum pressure 750 torr, pulse 1.0 s. This last shot raised the pressure to ~5 mtorr, tocross calibrate the ratiomatic against the MKS gauge for N2.

Physics Operator Summaries

Entered: Jul 7 2004 04:36:53:240PM

Author: To Be Determined

Physics Operator Summary for 950217 MP#087 IMpurity transport with non-recycling impurities (N2) SL: Blip/McCracken PO: Wolfe EO: Silva,Daigle The goal of this run was to measure N2 transport, with puffing from B-side upper and from various NINJA locations in the private and common flux regions. Initially small amounts were to be used to study transport, later larger amounts to affect SOL and divertor properties. These goals were accomplished, though not in the order listed in run plan found in the Physics Operator topic of the Logbook. Setup for segment 2 was from 950202007, but with NL_04 program set to 1.3e20. Other mods were: A-side plenum set to 19psi D2 B-side upper to 3psi N2 (later changed to 5) Reduce Pgain on Zcur 3 from 5 to 4 (as found yesterday) Hold IC_EF4 flat until 1 sec (at ~2500A) STRKPSI loaded from 950202014 to sweep around probe 2 (did not load other wire gains and waveforms that had changed between 7 and 14). Fill to 1.6e-5 Segment 1 was taken from last shot of previous day. Engineering setup was from late on 950210, including the higher current limits on OH1 and EF4. From the operator standpoint, this was a pretty boring run. There were two OH2 tests run before 8:30; shot 3 was the first plasma shot. N2 was puffed from B-side upper piezo at several densities on shots 4-14; the plenum pressure was raised to 5psi. Played with early gas and density programming to try to optimize current rise and early Moly. Shots 15-31 used NINJA to puff N2, with some background shots with no N2. It seemed to be necessary to increase the pressure in the NINJA plenum a lot to get a visible signal, but they finally succeeded. We then returned to the B-side valve for longer puffs (200msec) for 32-33, and 34 was a final background shot. Shot 32 (at NL04=1.1e20) detached; 33 at 0.9e20 did not. The last three "shots" were gas pulse calibrations. The N2 (28) level seemed to increase by about an order of magnitude over the course of the day; of course, some part of the base level of mass 28 is CO, so the actual increase may be larger. Records of major peaks at 1hour intervals may be found in the vacuum logbook. There were four fizzles today. The first, on #21, was almost certainly due to a NINJA N2 puff at -0.2 sec. Whether the others were related to residual N2 from previous shots is not clear. Dropping the fill to 1.4e-5 seemed to cure the problem, or at least make it tolerable, for shots 31-34. Up until the first fizzle (21) the breakdown plasma seemed to be moving in on the ECE, thereafter it seemed to form inside and move out. EF1L cut out early on shot 13, giving us our only early termination of the day (not counting fizzles). Aside from that, the run was disruption-free, all plasmas lasting past 1.4sec. I set up, but never used, a step rampdown sequence in segment 3 for development for MP89. By the time I had it ready, Yuichi wanted to pulse RF at EOF, and JT wanted to inject Moly. There was a problem with the jukebox at the start of the day which resulted in our being short of disk space. TWF was actively dealing with this all day, and there was no effect on the run, although we were close to full-up by the time we did the gas tests. Josh put up a new PCS at shot 13, and a repaired version at shot 14. The EF1L problem on 13 was not related to the new PCS. Note: 950202007 had zero offset on RCUR. Since Garry wanted this shot behavior and planned no current changes, I loaded it unchanged, rather than recalculating it and making adjustments to the RCUR waveform. However, this run should not be used as the basis for future runs at other currents without doing this right. Scorecard: ---------- Tests 5 (2 OH,3 gas) Fizzles 4 Plasmas 28 ------- -- Total 37

Session Leader Comments
Feb 17 1995 08:39:35:080AM		Bruce Lipschultz	run 950217 Engineering operator: F. Silva Physics operator S. Wolfe Session Leader G. McCracken & B. Lipschultz This run is for mini-proposal #87, Impurity Transport using Non-recycling Impurities. Specifically in this run we will be using N2 to: 1) Study trace impurity screening for comparison to recycling impurities (Ar, Ne); and 2) raise the N2 levels to try and maximize the impurity radiation in the SOL relative to that in the core plasma. Initially we will start by puffing through the standard piezo valve system (B-side, upper). This will be used to determine the confinement time in the plasma. Then we will continue by puffing through the ninja system at different poloidal locations.
Feb 17 1995 09:02:00:070AM	950217003	Bruce Lipschultz	shot 3: 800 kA, nl04=1.25e20. Sweeping of strike point in region of probe 2 of outer divertor. N2 injection thru B-side on the next shot
Feb 17 1995 09:17:10:240AM	950217004	Bruce Lipschultz	shot 4: Also fine. N2 puff went in. May have been very small. Moly monitor on. MacPherson for the next shot (hopefully!). Also, the scanning probe should go in next shot at .6, .75, .9 sec.
Feb 17 1995 09:35:22:080AM	950217005	Bruce Lipschultz	shot 5: nl04 lowered to 1.1e20. N2 puff the same. Probe scans at 0.6, 0.75, 0.9 seconds. MacPherson was supposed to be on and viewing. When the strike point is sweeping we see a very narrow pressure peak (1-2 mm) move around the divertor plate. This peak corr. to rho=1-2 mm in midplane radius. It is a factor of 2-5 larger magnitude than surrounding probe ,measurements. For the next shot we will move the N2 puff later in time (from 500 ms to 790 ms) and lengthen the pulse from 20 to 40 ms. Steve W. will also try to increase the inner gap to of order 2 cm.
Feb 17 1995 09:54:30:060AM	950217006	Bruce Lipschultz	shot 6: Puff of N2 at .79 seconds. We see the result on N-II in the divertor and Li-like N in the main plasma. It appears that the decay in the main plasma is faster may be faster than in the divertor. If this is true we may be getting additional recycling of the N2 in the divertor (recycling caused by D2 impacts). Next shot we will shift the N2 puff to 0.6 seconds. The inner gap was slightly better this shot (1.7 cm), we will continue to increase this gap.
Feb 17 1995 10:08:23:380AM	950217007	Bruce Lipschultz	shot 7: N2 puff at 0.6 seconds. There doesn't seem to be any effect on the divertor plasma. There is perhaps a small effect on the H-port H-alpha. Repeat shot so that OMA and McPherson can get more wavelength information.
Feb 17 1995 10:20:47:420AM	950217008	Bruce Lipschultz	shot 8: Same as shot 7. Next shot higher density - nl04=1.3e20
Feb 17 1995 10:37:49:790AM	950217009	Bruce Lipschultz	shot 9: nl04=1.3e20. The N-II background signal appears to be creeping up in the divertor. We will repeat the shot again for JT.
Feb 17 1995 10:56:53:630AM	950217010	Bruce Lipschultz	shot 10: no changes
Feb 17 1995 11:01:12:670AM	950217011	Bruce Lipschultz	shot 11: baseline (no N2 puff). nl04=1.3e20. Next shot N2 back on and nl04=1.5e20.
Feb 17 1995 11:16:40:080AM	950217012	Bruce Lipschultz	shot 12: Higher density shot, nl04=1.5e20. N2 puff on. Next shot lower nl04=0.9e20.
Feb 17 1995 11:33:18:020AM	950217013	Bruce Lipschultz	shot 13: power supply problem - disruption at 0.4 sec.
Feb 17 1995 11:50:58:840AM	950217014	Bruce Lipschultz	shot 14: nl04=0.9e20. N2 puff. Next shot we switch to NINJA valve and through the private flux zone capillary. 2 injections this shot of molybdenum at .7 and .88 sec.
Feb 17 1995 12:10:38:110PM	950217015	Bruce Lipschultz	shot 15: nl04=1.1e20. no effect on central plasma - not seen spectroscopically in either the divertor or main plasmas. Repeat shot with NINJA puff at inner wall.
Feb 17 1995 12:43:27:070PM	950217016	Bruce Lipschultz	shot 16: no effect with the N2. We will up the puff and move the initiation to earlier in the shot.
Feb 17 1995 12:44:48:490PM	950217017	Bruce Lipschultz	shot 17: This puff showed up clearly on the A-port video. However still no substantial effect on spectroscopic signals.
Feb 17 1995 12:50:55:050PM	950217018	Bruce Lipschultz	shot 18: No N2 puff. NL04=1.1e20. Next shot will have a puff into the private flux region.
Feb 17 1995 01:05:35:680PM	950217019	Bruce Lipschultz	shot 19: This puff in the private flux zone. Still no particular effect. Next shot switch to outer wall puff with NINJA. Injection at .88 sec.
Feb 17 1995 01:07:22:770PM	950217019	Bruce Lipschultz	shot 19: This puff in the private flux zone. Still no particular effect. Next shot switch to outer wall puff with NINJA. Injection at .88 sec.
Feb 17 1995 01:28:46:020PM	950217020	Bruce Lipschultz	shot 20: Puff from the outer wall capillary. Still no significant effect. We will increase the flow rate for the next shot.
Feb 17 1995 01:50:25:250PM	950217021	Bruce Lipschultz	shot 21: no shot, maybe too much N2. Next shot no N2
Feb 17 1995 01:52:10:920PM	950217022	Bruce Lipschultz	shot 22: shot recovered without N2. Next shot with N2 delayed to start at 0.0 sec (instead of -.2).
Feb 17 1995 02:16:45:630PM	950217023	Bruce Lipschultz	shot 23: puff at outer wall with capillary again. We are getting an effect on the spectroscopy signals. The central plasma level is ~ constant during the shot while the divertor N-II signal increases like t^2; perhps the N2 is accumulating in the divertor. We will repeat with the puff in the private flux region.
Feb 17 1995 02:33:32:700PM	950217024	Bruce Lipschultz	shot 24: same levels of N2 puff, puffed at outer wall. Less effect for the main plasma than shot 23. Next shot higher puff in private flux region.
Feb 17 1995 02:43:41:800PM	950217025	Bruce Lipschultz	shot 25: Higher gas puff in private flux region. There is some rearrangement at ~ 0.6 sec of the divertor profile but I don't know the reason. Next shot puff at inner wall, same level of N2.
Feb 17 1995 03:07:28:440PM	950217026	Bruce Lipschultz	shot 26: fizzle
Feb 17 1995 03:35:29:860PM	950217028	Bruce Lipschultz	shot 28: fizzle
Feb 17 1995 03:38:15:180PM	950217029	Bruce Lipschultz	shot 29: puff at outer wall.
Feb 17 1995 03:47:28:570PM	950217030	Bruce Lipschultz	shot 30: fizzle
Feb 17 1995 04:06:38:390PM	950217031	Bruce Lipschultz	shot 31: shot ok, puff at outer divertor surface. Same odd occurence at ~ 600 ms. John G. has analyzed shot 27 and it appears that the radiation is peaked inside the separatrix before 600 ms. After the 'rearrangement' of the plasma in the divertor the radiation shifts outside the separatrix to the inner nose region. Next shot switch back to B-side puff and longer (200 ms) pulse starting at 600 ms.
Feb 17 1995 04:06:52:810PM	950217031	Bruce Lipschultz	shot 31: shot ok, puff at outer divertor surface. Same odd occurence at ~ 600 ms. John G. has analyzed shot 27 and it appears that the radiation is peaked inside the separatrix before 600 ms. After the 'rearrangement' of the plasma in the divertor the radiation shifts outside the separatrix to the inner nose region. Next shot switch back to B-side puff and longer (200 ms) pulse starting at 600 ms.
Feb 17 1995 04:33:58:440PM	950217032	Bruce Lipschultz	shot 32: We get a 'classic' fast detachment at 700 ms, 100 ms after the N2 puff starts. The central density then takes off. Interestingly enough the central radiated power increases immediately. Jim Terry reports that the N levels in the main plasma rise immediately and then rise again after detachment. The N levels then drop immediately with the close of the valve.
Feb 17 1995 05:06:50:870PM	950217033	Bruce Lipschultz	shot 33: lower density (nl04=0.9e20) with the same high puff from B-side upper. No detachment although it looks like the main plasma heats during the N2 puff.
Feb 17 1995 05:08:35:060PM	950217034	Bruce Lipschultz	shot 34: Background shot at nl04=0.9e20. No N2 or NINJA D2 puff.

Physics Operator Comments
Feb 17 1995 07:25:02:200AM		Steve Wolfe	Run 950217 MP#087 Impurity transport w/ non-recycling impurities (N2) SL: Blip/McCracken PO: Wolfe EO: Silva Plan: 1. set up 800kA, NL_04=1.3e20 early diversion shot, both gaps >1.5cm 2. Introduce N2 through NINJA 3. Then use B-side upper piezo for N2 puff 4. Increase N2 from trace level to enough to detach 5. Use NINJA to inject into private flux zone 6. Density ramp or scan to determine detachment threshold with N2
Feb 17 1995 07:30:26:360AM		Steve Wolfe	Run 950217 MP#087 Impurity transport w/ non-recycling impurities (N2) SL: Blip/McCracken PO: Wolfe EO: Silva Setup: Load Segment 2 from 950202007. Increase density program to 1.3e20, lower gain from 8 to 4. Note: A-side plenum set to 19psi D2 B-side upper to 3psi N2 Note: 950202007 has zero offset on RCUR. Since Garry wants this shot behavior I won't change it, which would require adjustments to RCUR waveform. However, don't use this for other currents!
Feb 17 1995 07:33:48:560AM		Steve Wolfe	Run 950217 MP#087 Impurity transport w/ non-recycling impurities (N2) SL: Blip/McCracken PO: Wolfe EO: Silva Setup: Set fizzle detector from 1.9 and 2.0 (i.e. inactive) to 0.08 : 1.6 Engineering set up from 950210032 (high current limits on EF4, OH1.)
Feb 17 1995 08:15:02:790AM		Steve Wolfe	Setup: Reduce Pgain on Zcur 3 from 5 to 4 (as found yesterday) Hold IC_EF4 flat until 1 sec (at ~2500A)
Feb 17 1995 08:16:34:440AM	950217001	Steve Wolfe	Shot 950217001 OH2 test.
Feb 17 1995 08:31:27:290AM	950217002	Steve Wolfe	Shot 950217002 - another test. Blip wants the strikepoint program from 950202014. Load wave wire 12 to get it. This one sweeps the strike around probe 2. John had the gains different and RXL moved over. We'll see how it goes
Feb 17 1995 08:52:13:200AM	950217003	Steve Wolfe	Shot 950217003 - Base pressure (GV3 closed) 1.2e-6 Fill to 1.6e-5 PLasma. Ran through. PF breaker pulled Density a little low.
Feb 17 1995 09:07:54:950AM	950217004	Steve Wolfe	Shot 950217004 - INcrease density programing to get to density a little faster. Drop segment 1 PG 3 a little. INcrease N2 plenum pressure to 5psi and enable for next shot (20msec at 0.5 sec). Open Moly monitor, PCX,TCX. Plasma ran through - funny flash on TV late. Density looks a bit better. Ip(.1) still a little low (387)
Feb 17 1995 09:22:38:290AM	950217005	Steve Wolfe	Shot 950217005 - Reduce NL4 to 1.1e20. Reduce Early PG3 pulse in segment 1. Good plasma.
Feb 17 1995 09:45:06:140AM	950217006	Steve Wolfe	Shot 950217006 - MOve N2 puff to 790, increase width to 40msec. Move CLEARIN to 0.0 from -.002, delay Int gain to .45sec Draw RCUR a little further in between 200 and 500msec to try to help injection problem. Ran ok. Clearin still ramping a bit.
Feb 17 1995 09:57:07:450AM	950217007	Steve Wolfe	Shot 950217007 - Ramp drawn CLEARIN by .001 from 0.4 to 1.0sec Reduce slow ZCUR P gain from 3 to 2 at 0.9sec(see if vert mode improves) Move N2 pulse to 0.6sec Ran ok. ZCUR oscillation seems better at 0.9.
Feb 17 1995 10:14:46:900AM	950217008	Steve Wolfe	Shot 950217008 - Put slow Zcur Pgain to 2 from 0.5sec on Move early RCUR (seg 2) to 0.641 from 0.645 to try to keep it in, reduce Mo burst. Mo got worse!
Feb 17 1995 10:29:14:120AM	950217009	Steve Wolfe	Shot 950217009 - Increase NL4 to 1.3e20 Move early RCUR (seg 2) to 0.647 from 0.641 to try to reduce Mo burst. Plasma - Mo not much better, a little more instability on ZCUR.
Feb 17 1995 10:41:02:760AM	950217010	Steve Wolfe	Shot 950217010 - Increase PG3 between .06 and .1 sec. (seg 1). Plasma ran ok. OH2 pulled its breaker. Current rise still ok. Mo different, not better.
Feb 17 1995 10:47:05:910AM	950217010	Steve Wolfe	Shot 950217010 - Increase PG3 between .06 and .1 sec. (seg 1). Plasma ran ok. OH2 pulled its breaker. Current rise still ok. Mo different, not better.
Feb 17 1995 11:00:48:500AM	950217011	Steve Wolfe	Shot 950217011 - Tweak early seg 2 density program higher MOve early RCUR to 0.643 (seg 2) Still trying to work on Moly burst. Almost lost the breakdown, bounces at .014 Got some hard x-rays.
Feb 17 1995 11:01:20:640AM	950217011	Steve Wolfe	Shot 950217011 - Tweak early seg 2 density program higher MOve early RCUR to 0.643 (seg 2) Still trying to work on Moly burst. Almost lost the breakdown, bounces at .014 Got some hard x-rays.
Feb 17 1995 11:13:37:760AM	950217012	Steve Wolfe	Shot 950217012 - Raise NL04 to 1.5, tweak early density back down to keep gas off rail at 0.1 sec Raise fill to 1.8e-5 Re-enable B-side upper (off last shot for baseline). Moly is back bigger, but xrays gone.
Feb 17 1995 11:33:15:850AM	950217013	Steve Wolfe	Shot 950217013 - Put a big negative spike on Oh2's from 1.5 to 1.58 (for Gwinn) Then took it out again when he changed his mind. But used the new PCS, which JAS had cleverly kept from actually doing the load, so we would have got it. Lower NL04 to 0.9e20 Raise late seg 1 pG3 again. Disrupted at .44 sec. EF1L killed it.
Feb 17 1995 11:48:32:610AM	950217014	Steve Wolfe	Shot 950217014 - Lower NL04 to 0.9e20 Reduced late seg 1 PG3 (between what it was on 12 and on 13). PLasma ok. Current rise ok now. Several injections Mo back to 4e15 early, plus the injections.
Feb 17 1995 12:02:50:930PM	950217015	Steve Wolfe	Shot 950217015 - Raise NL04 to 1.1e20 Turn off B-side upper puff. They will now start the NINJA puff segment of the run. Plasma ok. Still the early Mo burst and some smaller ones around .75 and 1.1
Feb 17 1995 12:18:53:550PM	950217016	Steve Wolfe	Shot 950217016 - Raise A-side plenum pressure from 18 to 20.4psi (requested by Artur) Now try NINJA from midplane (didn't see anything from private last shot)) Plasma - Current rise still ok.
Feb 17 1995 12:39:48:010PM	950217017	Steve Wolfe	Shot 950217017 - Slight increase to PG3 at 60msec Raise NINJA plenum pressure to 1.7psi and move NINJA puff earlier (-.2) Plasma ok. Jim Terry now sees the N2 coming in from the capillary on the TV!. Irby just said its visible on the RGA Can't see it on the VUV!! Mo looks a little better.
Feb 17 1995 12:47:02:020PM	950217018	Steve Wolfe	Shot 950217018 - No changes on PCS. NINJA off next shot for background. Good plasma.
Feb 17 1995 01:00:26:240PM	950217019	Steve Wolfe	Shot 950217019 - No changes on PCS. NINJA puff in private flux zone. Plasma looked good. Small injection at 0.875
Feb 17 1995 01:19:19:380PM	950217020	Steve Wolfe	Shot 950217020 - Move ZXU up from 0.03 to 0.04 to see if can move upper SSEP away. Shot ran ok. Still barely seeing the N2. SSEP gets up to 2.0, when it is calulated.
Feb 17 1995 01:40:48:040PM	950217021	Steve Wolfe	Shot 950217021 - Put up NINJA plenum by factor of two. Puffing from midplane. Fizzle. Never formed. Might have been the N2 coming in early?
Feb 17 1995 01:42:38:060PM	950217021	Steve Wolfe	Shot 950217021 - Put up NINJA plenum by factor of two. Puffing from midplane. Fizzle. Never formed. Late breakdown. Might have been the N2 coming in early?
Feb 17 1995 01:52:21:290PM	950217022	Steve Wolfe	Shot 950217022 - Turn off NINJA N2 puff and see if plasma comes back. Plasma ran ok. That's their background shot. Breakdown is ok, but moving out; it doesn't bounce though.
Feb 17 1995 02:06:58:410PM	950217023	Steve Wolfe	Shot 950217023 - Delay NINJA puff till 0.sec Plasma ran ok. Breakdown still moving out.
Feb 17 1995 02:11:50:330PM	950217023	Steve Wolfe	Shot 950217023 - Delay NINJA puff till 0.sec Plasma ran ok. Breakdown still moving out. That time the spectroscopists saw the N2.
Feb 17 1995 02:25:54:160PM	950217024	Steve Wolfe	Shot 950217024 - NINJA puff in private flux zone again. RF firing at 0.9 sec Plasma ok. RF got about 0.2MW Breakdown a little worse.
Feb 17 1995 02:40:50:760PM	950217025	Steve Wolfe	Shot 950217025 - Raise NINJA plenum to 8psi (was 4). and delay to +0.2sec Plasma ran ok, Tracker Blip says "the footprint looks like we got an effect on the divertor". RF gets .4MW from D-port antenna.
Feb 17 1995 02:50:21:950PM	950217026	Steve Wolfe	Shot 950217026 - NINJA puff on inner wall. Terry will inject Mo at 1.05 sec Fizzle. Can't blame that one on NINJA, at least not on that shot. It bounced. Can't see it on ECE though
Feb 17 1995 03:07:36:440PM	950217027	Steve Wolfe	Shot 950217027 - Raise fill to 2.0e-5. NINJA puff on inner wall. Terry will inject Mo at 1.05 sec Plasma ran ok. Bad hesitation between 10 and 15 msec.
Feb 17 1995 03:19:36:920PM	950217028	Steve Wolfe	Shot 950217028 - Raise Segment 1 IC_EF4 from -1085 to -1100. Move NINJA puff to outer wall. Fizzle. Must have gone the wrong way.
Feb 17 1995 03:36:20:060PM	950217029	Steve Wolfe	Shot 950217029 - Put Segment 1 IC_EF4 back to -1085 from -1100. Fill back down to 1.8e-5 Move NINJA puff to outer wall. Plasma ran ok. Still a bad hesitation. RF up to 1MW at 0.9 sec
Feb 17 1995 03:46:27:660PM	950217030	Steve Wolfe	Shot 950217030 - Move NINJA location to outer divertor. Fizzle. No obvious reason. NO signal on ECE.
Feb 17 1995 04:02:27:280PM	950217031	Steve Wolfe	Shot 950217031 - Fill to 1.4e-5 . RF going for more power at 0.9sec That one went. Still some hesitation. A hint of hards.
Feb 17 1995 04:22:25:910PM	950217032	Steve Wolfe	Shot 950217032 - Re-enable B-side upper Turn off and Pump out NINJA system, and refill to 7psi of D2. (Don't puff NINJA on this shot.) Plasma - something lit up on TV besides the FSP. Still hesitates, this one is moving out again (Previous moved out to ECE channel 3, then back in). N2 puff clear on 2pi. Definitely shows a detachment on divertor.
Feb 17 1995 04:37:02:460PM	950217033	Steve Wolfe	Shot 950217033 - Drop density to 0.9e20 NINJA will puff at 0.5 sec D2 at inner wall. Plasma ok. some injections NINJA D2 puff seen on TV.
Feb 17 1995 06:04:17:990PM	950217034	Steve Wolfe	Shot 950217034 - Background shot, same as 33 but no N2 puff. Last plasma shot.
Feb 17 1995 05:10:32:170PM	950217035	Steve Wolfe	Shot 950217035 - B-side calibration Bside enabled, A-side disabled. Turn off trees: Edge.probes,MHD,Particles,RF
Feb 17 1995 05:15:26:270PM	950217036	Steve Wolfe	Shot 950217036 - B-side calibration of 40msec pulse from shot 14. Bside enabled, A-side disabled. Turn off trees: Edge.probes,MHD,Particles,RF
Feb 17 1995 05:20:08:520PM	950217037	Steve Wolfe	Shot 950217037 - A-side calibration for 950207023

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:14:00:760AM	Test	Bad	fizzel
2	08:24:39:360AM	Test	Ok	test ok
3	08:41:09:500AM	Plasma	Ok	plasma comm. fault oh2u&l
4	09:00:13:990AM	Plasma	Ok	no faults
5	09:17:58:650AM	Plasma	Ok	no faults
6	09:34:43:040AM	Plasma	Ok	no faults
7	09:52:48:060AM	Plasma	Ok	no faults
8	10:06:40:610AM	Plasma	Ok	no faults
9	10:20:30:960AM	Plasma	Ok	no faults
10	10:34:46:460AM	Plasma	Ok	comm fault
11	10:51:20:470AM	Plasma	Ok	no faults
12	11:05:09:360AM	Plasma	Ok	Comm Fault, OH2U&L, EF1U&L and OH1
13	11:21:10:820AM	Plasma	Ok	OH2U&L EF1L Comm Fault
14	11:40:18:040AM	Plasma	Ok	no faults
15	11:54:11:420AM	Plasma	Ok	no faults
16	12:10:28:720PM	Plasma	Ok	no faults
17	12:28:26:270PM	Plasma	Ok	no faults
18	12:41:56:810PM	Plasma	Ok	No Faults.
19	12:55:43:910PM	Plasma	Ok	No Faults.
20	01:09:15:770PM	Plasma	Ok	No Faulys.
21	01:31:08:210PM	Plasma	Ok	NO Faults.
22	01:45:36:900PM	Plasma	Ok	no faults
23	02:00:04:270PM	Plasma	Ok	no faults
24	02:15:36:400PM	Plasma	Ok	No Faults.
25	02:30:48:600PM	Plasma	Ok	No Faults.
26	02:44:32:490PM	Plasma	Ok	No Faults
27	02:58:17:970PM	Plasma	Ok	No Faults.
28	03:13:23:580PM	Plasma	Ok	No Faults.
29	03:26:49:660PM	Plasma	Ok	no faults.
30	03:41:06:770PM	Plasma	Ok	no faults
31	03:55:31:150PM	Plasma	Ok
32	04:13:15:540PM	Plasma	Ok	No Faults.
33	04:30:35:440PM	Plasma	Ok	No Faults.
34	04:45:15:140PM	Plasma	Ok	No Faults.
35	05:00:01:790PM	Test	Ok	Gas Puff Test.
36	05:13:33:290PM	Test	Ok	Gas Buff Test.
37	05:19:44:730PM	Test	Ok	Gas puff test.