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Operators | |
Session leader(s): | Amanda Hubbard,John Rice |
Physics operator(s): | Ian Hutchinson |
Engineering operator(s): | Gary Dekow,Bill Parkin |
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Topic | Entered | Author | Text |
SESSION_LEADER | Jul 19 2001 01:21PM | Amanda Hubbard | Got 2.3 MW, only a few minor trips. This time we had a series of more ELM-free H-modes, with accumulating impurities and radiation. Not a pretty sight. H/D is up to 0.18! Next shot, lower Ip to 0.9 MW in an attempt to get EDA conditions. |
PHYSICS_OPERATOR | Jul 19 2001 01:31PM | Ian Hutchinson | Plasma. Similar to previous. Disruption in ramp down. Horrid ragged H-modes. Ip to .9MA. |
RF | Jul 19 2001 07:44AM | JV1/JV3 Phase balance detector setpoint changed from .5V to 0V, or from +/-65deg. to +/-90deg. Voltage ref. caps on phase reference and power threshold inputs to comparators were changed from .005 to 1uf. Same was done on JV2/JV4 phase balance detector. |
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RF | Jul 19 2001 01:24PM | Paul Bonoli | BT = 5.3T, Ip~ 1.0 MA, nl_04~0.76x10^20 m^-2 Request: D: 1.0 MW [0.6,1.5] sec E: 1.3 MW [0.6,1.5] sec J: Off Result: Plasma - H-mode D: Ran E: Ran J: Note: Next Shot: Reduce current to 900 kA |
Topic | Entered | Author | Text |
SESSION_LEADER | Jul 19 2001 04:14PM | Amanda Hubbard | Physics Run plan for 1010719, MP 287 Asdex H-mode similarity experiment Goal: To make high density, high power EDA H-modes in a shape identical to that in ASDEX-Upgrade 'Type II ELM' discharges. This regime, which was only recently obtained on AUG, appears rather similar to that obtained on C-Mod when power is increased into EDA H-modes. At reduced powers, AUG sometimes sees a 'quasi-coherent' mode. We would like to see if the same behaviour is observed on the two machines with the same dimensionless parameters. We will obtain edge profiles both at threshold and in the steady H-mode period. AUG will then try to match the dimensionless parameters (nu*,beta, rho*) of these discharges. Plan: 1) Obtain suitable shape, plasma parameters. Start with shape from shot 1010605016. Raise Ip to 1.0 MA, keep Bt at 5.3 T. L-mode nel=1.1e20 m-2. Once plasma is obtained, adjust shape to get a better match to AUG pulse 14265. This will involve increasing the inner gap and the radius of the x-point. RF should use these shots (3-4?) to tune and condition; For the last shot we would like a power ramp up to >~2 MW to get the threshold power, and both L and H-mode tunes. 2) High power EDAs. Use square wave RF pulse at Ptot=2.5 MW using D and E at 80 MHz (more if we can get it). Measure pedestals, and fluctuations. Tune J-port at low power on these. 3) Add power from J-port (70 MHz), at maximum available power. This will be off-axis, which is non-optimal, but should help to raise pedestal temperature. 4) Increase density. A dimensionless match to the best AUG 'grassy ELM' shots would correspond to a line integrated density of 4.7e20, higher than our usual range. Increase starting density, and probably puff gas into EDA, to see how high we can get and still maintain a decent, steady H-mode (and couple enough power). ECE will probably be cut off, so good ETS data are essential. Again, use max available power without and with J-port. 4) Once the 'high density' H-mode has been characterized, use a slow power ramp to determine the corresponding threshold power and edge parameters. |
PHYSICS_OPERATOR | Jul 19 2001 08:36AM | Ian Hutchinson | MP 287 AUG Similarity Cold start. Start PCS. Import segment 2 from USER10:[WOLFE.MDS.SHOTS.HYBRID.PCS]PCS_1010706000 Load. |
SL_SUMMARY | Jul 07 2004 03:49PM | To Be Determined | #41 of 43 OPS Date: 20-JUL-2001 15:03 Expires: 3-AUG-2001 15:03 From: AMAZON::HUBBARD Subj: Run Summary 1010719 (ASDEX Upgrade Similarity) Physics Run Summary for 1010719, MP 287 Asdex H-mode similarity experiment Session Leader: Amanda Hubbard Physics Operator: Ian Hutchinson RF Operators: S. Wukitch, Y. Lin Goal: To make high density, high power EDA H-modes in a shape identical to that in ASDEX-Upgrade 'Type II ELM' discharges. This regime, which was only recently obtained on AUG, appears rather similar to that obtained on C-Mod when power is increased into EDA H-modes. At reduced powers, AUG sometimes sees a 'quasi-coherent' mode. We would like to see if the same behaviour is observed on the two machines with the same dimensionless parameters. We will obtain edge profiles both at threshold and in the steady H-mode period. AUG will then try to match the dimensionless parameters (nu*,beta, rho*) of these discharges. Plan: 1) Obtain suitable shape, plasma parameters. Start with shape from shot 1010605016. Raise Ip to 1.0 MA, keep Bt at 5.3 T. L-mode nel=1.1e20 m-2. Once plasma is obtained, adjust shape to get a better match to AUG pulse 14265. This will involve increasing the inner gap and the radius of the x-point. RF should use these shots (3-4?) to tune and condition; For the last shot we would like a power ramp up to >~2 MW to get the threshold power, and both L and H-mode tunes. 2) High power EDAs. Use square wave RF pulse at Ptot=2.5 MW using D and E at 80 MHz (more if we can get it). Measure pedestals, and fluctuations. Tune J-port at low power on these. 3) Add power from J-port (70 MHz), at maximum available power. This will be off-axis, which is non-optimal, but should help to raise pedestal temperature. 4) Increase density. A dimensionless match to the best AUG 'grassy ELM' shots would correspond to a line integrated density of 4.7e20, higher than our usual range. Increase starting density, and probably puff gas into EDA, to see how high we can get and still maintain a decent, steady H-mode (and couple enough power). ECE will probably be cut off, so good ETS data are essential. Again, use max available power without and with J-port. 4) Once the 'high density' H-mode has been characterized, use a slow power ramp to determine the corresponding threshold power and edge parameters. Results: We had limited success with this run, primarily due to poor machine conditions. This was probably a result of the recent vent, combined with the fact that we were running non-standard shapes, and thus putting power on different vessel surfaces. This led to impurity injections and, most critically, to a high hydrogen fraction (up to 20%) which limited the RF power absorption; H/D typically increases during each discharge, with Pabs decreasing. The shape development part of the run went quite smoothly, and we did get shots which were a very close match to ASDEX Upgrade shapes (see physics operator summary for details of changes made). These had elongation close to our vertical stability limits (k~1.73), and were close to double null, which may have caused some interaction with upper vessel surfaces, and possibly also increased H-mode thresholds. The last AUG shaped shot, 1010719020, is a good example (Delta_u=0.34, delta_l= 0.47) J-port was not available for the run after all, so we ran with typically 2.3 MW at 80 MHz from D and E port antennas. However, the low absorption means that the effective power was actually much lower, especially late in the pulse. We were unable to get any H-modes which had a steady, EDA character. Many were ELM-free, with strongly increasing impurities. (eg. shot 2, 14). Others, with lower power and higher radiation, had periodic behaviour typical of Type III ELMs; the pedestal was very cold (eg. shots 5,13). On shots 9 and 11 we ramped the RF up slowly to get threshold data, and found it was over the 2.3 MW injected); this is very high for these C-Mod conditions. Making the discharge more 'single null' had little effect (shot 12). Lowering the target density from nel= 0.9 to 0.7e20 m-2, while it had minimal effect on nebar at the RF onset (1.35-1.4e20m-3 in both cases), resulted in much lower neutral pressure anda threshold of Prf=1.13 MW (shot 13). This may be a good point for threshold comparison, though it was rather early in the ramp. Shot 14 had full RF power at this density, and resulted in ELM-free H-modes. In an attempts to favour the EDA regime, Ip was lowered from 1.0 to 0.9 MA from shot 15 on. This raised q95 to 4.2. The rates of density rise did decrease slightly, though not an obvious EDA regime. Shot 16 had hints of a weak quasi-coherent mode on PCI. Shot 17 was colder and more ELMy. From shot 19 Bt was raised from 5.3 T to 5.6 T, raising q95 still further and a better match to the AUG target. This proved more difficult for the RF to match, for reasons not well understood at least by me, and power was not as steady as the rest of the day. The density did appear to be getting more steady, and QC modes characteristic of EDA were seen on PCI. Shot 21, about 0.75-0.8 secs, may be a good time for pedestal analysis. For shot 22, we went back to a standard shape, 800 kA shot to check we could get EDA there. We did, but it quickly cooled and reverted to Type III ELMs as H/D rose. In summary, as expected, it was more difficult to get steady H-modes in the lower triangularity ASDEX-Upgrade shape. However, the poor machine conditions and low absorbed power undoubtedly were a major impediment, and there were indications we were getting close. There was insufficient power to try raising the density. Since the discharge development has been successfully completed, we would very much like to revisit this experiment on a day with better vessel conditions and all three RF antennas available. Shot Details: ---------------------------------------------------------------------------- 1010719001 hubbard SESSION_LEADER Jul 19 2001 8:54:52:166AM . . . . . . . . . . . . . . . . . . . . First shot had 5.6 T, 2 MW RF with several trips. 3 H-modes, very ELM-free. ---------------------------------------------------------------------------- 1010719002 hubbard SESSION_LEADER Jul 19 2001 9:13:07:103AM . . . . . . . . . . . . . . . . . . . . Bt= 5.35 T, 2 MW RF. 3 H-modes, very ELM-free. 3 H-modes, ended by big injections. Disrupts 1.3 secs. H/D getting to 10%, and second half of flat-top is L-mode, indicating poor heating and/or high radiation. For next shot, increase outer gap. ----------------------------------------------------------------------------- 1010719005 hubbard SESSION_LEADER Jul 19 2001 10:35:02:120AM . . . . . . . . . . . . . . . . . . . . Better; makes it to 1.47 secs. Three H-modes, and the third is quite steady. However, H/D at this point is 20%, radiation is high and net power therefore presumably very low. Pedestal Te ~ 200 eV; may be in an intermittent ELMy/EDA regime. For next shot, try to increase RF power. Asked Stu Zweben to delay D2 puffing to 1.4 secs. ----------------------------------------------------------------------------- 1010719006 hubbard SESSION_LEADER Jul 19 2001 10:36:52:666AM . . . . . . . . . . . . . . . . . . . . Disrupted 0.82 seconds. Two H-modes, not EDA. Both end due to rapid increase of Prad. H/D still very high, though core heating seems OK in this early period. Next shot: ramp RF power slowly to get threshold point, and also see if injections are related to Prf. ----------------------------------------------------------------------------- 1010719008 hubbard SESSION_LEADER Jul 19 2001 11:01:57:353AM . . . . . . . . . . . . . . . . . . . . Disrupted 0.92 seconds; vertical instability, no big injections. RF ramp got to 1.2 MW, stayed in L-mode. H/D~8%. Will increase outer gap a bit to try to improve stability, try ramp again. ----------------------------------------------------------------------------- 1010719009 hubbard SESSION_LEADER Jul 19 2001 11:49:21:743AM . . . . . . . . . . . . . . . . . . . . Made it all the way to rampdown, but with a huge injection 0.75 secs. RF ramps to 2.3 MW, but stays in L-mode. Why?? ECE valve was closed. Nice shape match, esp earlier in flat-top ----------------------------------------------------------------------------- 1010719011 hubbard SESSION_LEADER Jul 19 2001 12:20:25:196PM . . . . . . . . . . . . . . . . . . . . Made it to 1.4 seconds. RF ramps 1.0 to 2.3 MW, as requested. Plasma STILL stays in L-mode. Why?? Got good central heating, Te0 1.3-2.6 keV. Possibly we are too close to double-null; will change upper x-pt for next shot and repeat. ----------------------------------------------------------------------------- 1010719012 hubbard SESSION_LEADER Jul 19 2001 12:45:39:916PM . . . . . . . . . . . . . . . . . . . . VERY similar to shot 11. Made it to 1.4 seconds. RF ramps 1.0 to 2.3 MW, as requested. Plasma STILL stays in L-mode. Why?? Try backing off on density, replace ~200 kW of D-port power by E-port in case it is contributing to the injection. ----------------------------------------------------------------------------- 1010719013 hubbard SESSION_LEADER Jul 19 2001 1:09:58:650PM . . . . . . . . . . . . . . . . . . . . Lowering density got us into H-mode, at 0.665 secs, 1.13 MW. H-mode was very ELMy; low pedestal temperatures. RF ramped up slowly as requested, H/D ramped up to 0.2 (as NOT requested). Next shot try full RF power right away. ----------------------------------------------------------------------------- 1010719014 hubbard SESSION_LEADER Jul 19 2001 1:21:51:980PM . . . . . . . . . . . . . . . . . . . . Got 2.3 MW, only a few minor trips. This time we had a series of more ELM-free H-modes, with accumulating impurities and radiation. Not a pretty sight. H/D is up to 0.18! Next shot, lower Ip to 0.9 MW in an attempt to get EDA conditions. ----------------------------------------------------------------------------- 1010719015 hubbard SESSION_LEADER Jul 19 2001 2:08:46:020PM . . . . . . . . . . . . . . . . . . . . Reducing Ip to 900 kA increased q95 to ~4.2. Got a somewhat longer, steadier H-mode; not quite EDA I think. A few RF trips; retune and repeat. ----------------------------------------------------------------------------- 1010719016 hubbard SESSION_LEADER Jul 19 2001 2:16:33:593PM . . . . . . . . . . . . . . . . . . . . Steady RF on this one, 2.2 MW. For some reason H-modes are shorter, accumulate more ne and impurities. Next shot, increase nel ~ 10%. Nel was 0.75-1.84x10^20 m-2 on this one. Appears to be a weak quasicoherent mode partway through these H-modes (as seen on PCI). Frequency is lower than usual. ----------------------------------------------------------------------------- 1010719017 hubbard SESSION_LEADER Jul 19 2001 2:38:33:220PM . . . . . . . . . . . . . . . . . . . . At slightly higher nel 0.87-1.9x10^20 m-2, got into a series of ELMy periods. Temperatures, edge and core, drop dramatically through RF pulse, presumably due to high H/D. For the next shot, raise Bt to 5.6 T, as in the original run plan, thus raising q95. ----------------------------------------------------------------------------- 1010719019 hubbard SESSION_LEADER Jul 19 2001 3:09:55:533PM . . . . . . . . . . . . . . . . . . . . Bt 5.6, q95=4.3. two H-modes, but really not at all EDAish. ne, Prad rise and erode Tedge. RF had some trips; will retune for the new field and try again. Also increasing outer gap slightly. ----------------------------------------------------------------------------- 1010719020 hubbard SESSION_LEADER Jul 19 2001 3:43:27:930PM . . . . . . . . . . . . . . . . . . . . Rather similar. RF finds big loading changes ~0.8-0.9. Retune, lower power and try again. ----------------------------------------------------------------------------- 1010719021 hubbard SESSION_LEADER Jul 19 2001 3:52:12:270PM . . . . . . . . . . . . . . . . . . . . Still a lot of RF trips. Two H-modes. The first has a steadier density, though conditions never get quite stationary. Period 0.75-0.8 secs is fairly steady, may be good to look at pedestal parameters. QC mode appears during this window too (on PCI) nel1.6e20 m-2, nebar=2.8e20 m-3, TE,ped 340 ev(Thomson) (also Te7, ECE), te_95 =400 eV, ne_95 1.8e20. All profiles, parameters need checking! For next shot, load a standard C-Mod shape from 1010716004, 780 kA, 5.36 T, to see if we get back a good EDA. ----------------------------------------------------------------------------- 1010719022 hubbard SESSION_LEADER Jul 19 2001 4:10:21:470PM . . . . . . . . . . . . . . . . . . . . reload of 1010716004 (780 kA, standard shape) does give EDA, at least to ~0.8 seconds. Edge and core temps then decrease, presumably due to H/D increase (8-12 %), and discharge gets ELMy. PCI sees 'classic QC mode' ~1.9 MW RF, better loading. - |
PO_SUMMARY | Jul 07 2004 04:37PM | To Be Determined | Physop Summary for 19 Jul 2001 MP 287 AUG Similarity. PO Hutch SL Hubbard. Summary _______ Shapes that are an excellent match to the scaled AUG shape were obtained (e.g. 21) and many were run. A comparison plot is in user10:[hutch.ps]aug_match.ps. They are close to double null; although a range of three sseps was run without obvious effect on the plasma character. No solid EDA H-modes were obtained. The H/D was high and rose strongly with RF in the early part of the day. Later on, the rises seemed less significant, but in all cases the H/D was above 10% during much of the RF pulse. Heating was clearly inefficient in many cases. In some others heating was ok even at high H/D. The early part of the day was plagued with injections. Many appeared to be caused by visible sparks on the upper left corner of D-antenna. Some others were not RF induced. As the day wore on, these problems were less severe, and the plasma ran reasonably reliably. These shapes are fairly close to stability limits. One or two VDEs were experienced. The chopper V was set to 150 to 200 instead of the usual 0 to lower the operating average current to a position closer to the center of its range. This adjustment seemed to be a significant improvement in that it allowed operation with an elongation that gave rise to noisy chopper behaviour without leading to saturations and subsequent VDE. A manual gas puff during the RF did not significantly improve the operation, but also did not seem to give much impact on the RF coupling despite a x2 rise in main chamber neutral pressure. It appears to be confirmed that the lower triangularity that is needed to match AUG makes it harder to get into EDA. The high H level was also definitely a handicap. Scorecard. __________ Shot,Duration(s),Ipmax(MA) Shot,Duration(s),Ipmax 1 1.910 1.005 2 1.322 1.059 3 0.745 1.012 4 0.934 1.002 5 1.533 0.992 6 0.816 0.999 7 0.000 0.031 8 0.939 1.062 9 1.889 0.992 10 0.000 0.034 11 1.443 1.012 12 1.456 1.023 13 1.925 0.999 14 1.671 1.005 15 1.905 0.911 16 1.912 0.909 17 1.895 0.908 18 0.000 0.024 19 1.920 0.914 20 1.905 0.914 21 1.928 0.914 22 1.921 0.810 Finished summary for 1010719 Total of 22 shots. 22 shots. 19 plasmas. 1 fizzles. 2 PS duds. Details _______ 1010719xxx hutch PHYSICS_OPERATOR Jul 19 2001 8:36:56:150AM . . . . . . . . . . . . . . . . . . . . MP 287 AUG Similarity Cold start. Start PCS. Import segment 2 from USER10:[WOLFE.MDS.SHOTS.HYBRID.PCS]PCS_1010706000 Load. ---------------------------------------------------------------------------- 1010719001 hutch PHYSICS_OPERATOR Jul 19 2001 8:56:17:993AM . . . . . . . . . . . . . . . . . . . . Plasma. 3 ELM-free H-modes and a ramp-down. RF a ragged 2MW max. zxu to 0 from +2cm Bt to 5.4T (150kA) ---------------------------------------------------------------------------- 1010719002 hutch PHYSICS_OPERATOR Jul 19 2001 9:13:21:963AM . . . . . . . . . . . . . . . . . . . . Plasma disrupts at 1.3s seems to be an injection. RF antenna injections earlier in the shot cause H-mode drop outs. Move rcur in 2-3mm. Lower clearin 0-1mm. ---------------------------------------------------------------------------- 1010719003 hutch PHYSICS_OPERATOR Jul 19 2001 9:34:30:933AM . . . . . . . . . . . . . . . . . . . . Plasma disrupts at 0.73s. Big injection. Appears on wide angle at D. Take 1 ms off the fill puff to compensate for the DNB. Add 2mm to rxl. ---------------------------------------------------------------------------- 1010719004 hutch PHYSICS_OPERATOR Jul 19 2001 9:55:15:370AM . . . . . . . . . . . . . . . . . . . . Plasma disrupts at 0.92s. Multiple injections starting at 0.56s. Which is before the RF turns on. Install a ramp in rxl to try to avoid the injections. Raise nl04 at 0.2ms to try to keep puff on. ---------------------------------------------------------------------------- 1010719005 hutch PHYSICS_OPERATOR Jul 19 2001 10:20:30:026AM . . . . . . . . . . . . . . . . . . . . Plasma. Disrupts at 1.52s. H to D ratio is high. Repeat ---------------------------------------------------------------------------- 1010719006 hutch PHYSICS_OPERATOR Jul 19 2001 10:38:06:526AM . . . . . . . . . . . . . . . . . . . . Plasma. Disrupts at .62s. Remove the big rxl jerk in ramp-down. Also ramp to the lower triangularity quicker. By .9s. ---------------------------------------------------------------------------- 1010719007 hutch PHYSICS_OPERATOR Jul 19 2001 10:49:54:806AM . . . . . . . . . . . . . . . . . . . . No TF. Dud. ---------------------------------------------------------------------------- 1010719008 hutch PHYSICS_OPERATOR Jul 19 2001 11:25:21:853AM . . . . . . . . . . . . . . . . . . . . Plasma. Disrupts at 0.93s. VDE. Chopper working hard. Reduce clearin by 2mm. Put chopper V to +150V during shot to change offset and try to give us more headroom on vertical control. ---------------------------------------------------------------------------- 1010719009 hutch PHYSICS_OPERATOR Jul 19 2001 11:47:15:823AM . . . . . . . . . . . . . . . . . . . . Plasma. Survived to ramp-down. Chopper average current was lowered as anticipated and this seems to be a better place to run. RF stayed on. No H-mode. Repeat ---------------------------------------------------------------------------- 1010719010 hutch PHYSICS_OPERATOR Jul 19 2001 12:05:42:963PM . . . . . . . . . . . . . . . . . . . . Fizzle. Take 0.5ms off the gas fill puff. ---------------------------------------------------------------------------- 1010719011 hutch PHYSICS_OPERATOR Jul 19 2001 12:28:12:823PM . . . . . . . . . . . . . . . . . . . . Plasma disrupts at 1.4s. Injection. No H-mode. zxu to .01 from 0, to back away from double null and see if we can get H-mode back ---------------------------------------------------------------------------- 1010719012 hutch PHYSICS_OPERATOR Jul 19 2001 12:48:03:806PM . . . . . . . . . . . . . . . . . . . . Plasma. Disrupts at 1.45s. These injections seem to occur at D antenna. nl04 to 0.9 from 1.1 ---------------------------------------------------------------------------- 1010719013 hutch PHYSICS_OPERATOR Jul 19 2001 1:10:14:790PM . . . . . . . . . . . . . . . . . . . . Plasma. H-modes. No disruption. Repeat. ---------------------------------------------------------------------------- 1010719014 hutch PHYSICS_OPERATOR Jul 19 2001 1:31:57:056PM . . . . . . . . . . . . . . . . . . . . Plasma. Similar to previous. Disruption in ramp down. Horrid ragged H-modes. Ip to .9MA. ---------------------------------------------------------------------------- 1010719015 hutch PHYSICS_OPERATOR Jul 19 2001 1:55:33:776PM . . . . . . . . . . . . . . . . . . . . Plasma. H/D peaks at 17%. Chopper V ramps to 200 at 1.3s ---------------------------------------------------------------------------- 1010719016 hutch PHYSICS_OPERATOR Jul 19 2001 2:23:02:633PM . . . . . . . . . . . . . . . . . . . . Plasma. Similar to previous. Raise early nl04 and target to .95. Put a V gas 3 puff of 50V at .75 to .85s. ---------------------------------------------------------------------------- 1010719017 hutch PHYSICS_OPERATOR Jul 19 2001 2:38:23:720PM . . . . . . . . . . . . . . . . . . . . Plasma. Radiative L/H sustained phase. TF current to 156kA. Back off slightly on nl04 during .5s. Manual V pulse to 100V. ---------------------------------------------------------------------------- 1010719018 hutch PHYSICS_OPERATOR Jul 19 2001 2:53:27:166PM . . . . . . . . . . . . . . . . . . . . Dud. No EF4. ---------------------------------------------------------------------------- 1010719019 hutch PHYSICS_OPERATOR Jul 19 2001 3:16:23:890PM . . . . . . . . . . . . . . . . . . . . Plasma. Move in Rcur by 2mm. Turn off nl04 gain at .6s. ---------------------------------------------------------------------------- 1010719020 hutch PHYSICS_OPERATOR Jul 19 2001 3:38:09:733PM . . . . . . . . . . . . . . . . . . . . Plasma. 3 H-modes. RF tripping. Survives the narrower shape. RF reports a big drop in load during the time the neutral pressure is rising. Hence remove the gas puff. ---------------------------------------------------------------------------- 1010719021 hutch PHYSICS_OPERATOR Jul 19 2001 4:03:49:336PM . . . . . . . . . . . . . . . . . . . . Plasma. Import segment 2 from 1010716004 a standard EDA shot at .8MA. The ramp in antenna loading is still strong, apparently. Hence we can probably rule out the gas puff as the cause. ---------------------------------------------------------------------------- 1010719022 hutch PHYSICS_OPERATOR Jul 19 2001 4:04:45:336PM . . . . . . . . . . . . . . . . . . . . Plasma. EDA just. But not pretty. |
TCI | Jul 19 2001 07:55AM | Rick Murray | TCI signal levels look good this morning. |