| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Paul Bonoli |
| Physics operator(s): | Jim Irby |
| Engineering operator(s): | Bill Parkin,Bill Cochran |
| Engineering Operator Run Comment |
| MP #277A Internal Transport Barrier Studies at 4.5T with Simultaneous an |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:26:040PM |
| Author: To Be Determined |
| Run Summary for Wednedsday - December 13, 2000 Mini-proposal No. 277A: Internal Transport Barrier Studies at 4.5T with Simultaneous Central and Off-axis ICRF Heating 1001213 Physics Operator: Jim Irby Session Leader: Paul Bonoli ____________________________________________________________________________ Run Summary ____________________________________________________________________________ This was a fairly successful run day from the standpoint of implementing various elements of the run plan. We were able to eventually reproduce the density barrier mode at 4.5T with off-axis ICRF heating only (80 MHz system). A sequence of shots was then taken where HIREX data was obtained at different radial locations out to r/a of 0.5. Hopefully, T_i and plasma rotation profiles can be deduced from this data. The rf group was also able to get the 70 MHz ICRF system running with a power ramp up to the 600-700 kW level on the last few shots of the day. Finally, the H/D ratio stayed at 0.04-0.06 for the day. Shots 001 - 010 were not optimal for HIREX measurements either because the 80 MHz rf power had faults, or because we had trouble obtaining an "early" sustained H-mode with consequent density peaking. On Shot 011 the plasma outer gap was reduced from 1.5 cm to 1.0 cm to improve antenna coupling and the results were very positive. On Shots 011 - 018 we got the density barrier mode plus HIREX data. A typical best shot during this scan was 1001213016, where P_icrf = 2 MW, W_mhd = 85 kJ, and ne0_TS = 3.0 X 2.0 = 6.0 X 10^20 at the end of the density rise. The factor of 2.0 in the evaluation of the density is the suggested fudge factor for the core Thomson scattering as posted on the OPS bulletin board on December 15, 2000. On shots 018-020 the 70 MHz J-port system was turned on at different times at low power level (200-600 kW), in addition to the D & E port power. The density increase during the barrier mode appeared to be "arrested" by application of the J-port power in this mode. However, this could be too low an rf power level for reaching any conclusions concerning the effect of the on-axis, 70 MHz heating on the density barrier mode. On shots 021-022 we turned off D & E ports (80 MHz power) and turned on J-port only in a ramp from 0.7 sec. to 1.4 sec. (up to 600 kW). We got delayed H-modes in each case with no real density peaking. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:12:817PM |
| Author: To Be Determined |
| Engineering setup for run 1001213 MP #277A Internal Transport Barrier Studies at 4.5 T with Simultaneous and Off-Axis ICRF Heating Session leader : Bonoli EOs : Cochran, Parkin Physics operator: Irby ECDC in D2 overnight Power systems as on 1001212013 Gas setup: fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 35 psi of D2 Hybrid DISABLED, for ECDC fill C-side with 30 psi of D2 Hybrid enabled leave J-bot as is Hybrid DISABLED Enable the following gate valves: ECE, VUV, Beast, DNB RF Setup: XMTRs 1,2, and 4 should be made ready for operation by 8:00 Run starts at 09:00 and ends at 17:00. Summary ------- Machine ran much better today than yesterday, probably because of the overnight ECDC. Only a couple of tweaks to Br and gas were required at the beginning of the run. We had only one fizzle. Impurity levels (CII, RGA) were very low. HtoD was typically 5 to 7% by the end of the day. We made a very good start at getting j-port running at 70 MHz (600kW level so far). Score ----- plasmas 21 fizzles 01 duds 00 Problems -------- TCI still not back to good performance levels. Combination of laser and alignment problems. Had one data system slowdown, but no loss of data. Took time in the morning to get the j-port coax arc fixed Details ------- ---------------------------------------------------------------------------- 1001213xxx irby DISCHARGE_CLEAN Dec 13 2000 7:26:39:920AM . . . . . . . . . . . . . . . . . . . . ECDC was run overnight in D2 at 2.e-4 Torr. ---------------------------------------------------------------------------- 1001213001 irby PHYSICS_OPERATOR Dec 13 2000 10:19:30:093AM . . . . . . . . . . . . . . . . . . . . Started about an hour late to give the RF guys time to fix the arc in the gas block at j-port. Will pump and purge j-port while we get going with D and E. Startup from 1001212013 Plasma to rampdown H-mode with less than 1 MW D+E Startup not too pretty Ip (kA): -0.4697 -13.4404 -29.0054 -65.3463 dIp/dt (kA/ms): -1.2717 -2.9282 -2.2901 -4.0715 pressure (mTorr): 0.0577 0.0590 0.0564 0.0632 Bz0 (mT): -4.7479 -1.2180 -0.1831 17.9265 Br0 (mT): -0.7205 -1.0088 -1.0090 -1.6193 ---------------------------------------------------------------------------- 1001213002 irby PHYSICS_OPERATOR Dec 13 2000 10:32:54:326AM . . . . . . . . . . . . . . . . . . . . Added 2 ms to prepuff asking for a little more RF power Plasma to rampdown Better looking H-Mode RF power to abt 1.4 MW Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4924 -16.0346 -26.4112 -99.0477 dIp/dt (kA/ms): -1.6554 -2.7965 -2.5455 -6.7386 pressure (mTorr): 0.0715 0.0748 0.0748 0.0715 Bz0 (mT): -4.8656 -2.5432 0.6353 18.5165 Br0 (mT): -0.9701 -0.9132 -1.0259 -2.3500 Bz continues it's random walk Reports of ITB on second h-mode ---------------------------------------------------------------------------- 1001213003 irby PHYSICS_OPERATOR Dec 13 2000 10:48:55:623AM . . . . . . . . . . . . . . . . . . . . No PCS changes Plasma to rampdown D-port didn't stay on ---------------------------------------------------------------------------- 1001213004 irby PHYSICS_OPERATOR Dec 13 2000 11:17:38:826AM . . . . . . . . . . . . . . . . . . . . Took 1 ms off pulsed gas Fizzle --- Br? Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4924 -16.0346 -29.0054 -23.8171 dIp/dt (kA/ms): -1.5282 -2.7954 -1.7803 0.6369 pressure (mTorr): 0.0756 0.0791 0.0748 0.0715 Bz0 (mT): -2.9320 -1.3481 0.0881 17.2264 Br0 (mT): -1.0138 -1.0085 -1.3326 -1.1475 ---------------------------------------------------------------------------- 1001213005 irby PHYSICS_OPERATOR Dec 13 2000 11:35:49:843AM . . . . . . . . . . . . . . . . . . . . Changed Br offset to 0.0015 from 0.0013 T Reduced gas prepuff by another 1 ms Plasma into rampdown RF okay, H-modes, HtoD 4 to 5% Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4924 -16.0573 -29.0281 -109.4470 dIp/dt (kA/ms): -1.5249 -2.7976 -3.5606 -7.6310 pressure (mTorr): 0.0676 0.0668 0.0653 0.0632 Bz0 (mT): -1.8579 0.2718 1.6071 21.5654 Br0 (mT): -0.8195 -0.8962 -1.2316 -2.0872 Pressure and Br better ---------------------------------------------------------------------------- 1001213006 irby PHYSICS_OPERATOR Dec 13 2000 11:58:24:343AM . . . . . . . . . . . . . . . . . . . . No PCS changes Disruption at 0.92 s --- more RF power? Startup looks good HtoD 4 to 5% ---------------------------------------------------------------------------- 1001213007 irby PHYSICS_OPERATOR Dec 13 2000 12:24:55:140PM . . . . . . . . . . . . . . . . . . . . No PCS changes --- a little less e-port Plasma to 1.5 s Startup okay ---------------------------------------------------------------------------- 1001213008 irby PHYSICS_OPERATOR Dec 13 2000 12:40:01:373PM . . . . . . . . . . . . . . . . . . . . No PCS changes Plasma to rampdown ---------------------------------------------------------------------------- 1001213009 irby PHYSICS_OPERATOR Dec 13 2000 12:59:33:326PM . . . . . . . . . . . . . . . . . . . . repeat plasma to rampdown Lost most TCI channels ---- laser unstable. ---------------------------------------------------------------------------- 1001213010 irby PHYSICS_OPERATOR Dec 13 2000 1:07:35:450PM . . . . . . . . . . . . . . . . . . . . No changes plasma to 1.47 s ---------------------------------------------------------------------------- 1001213011 irby PHYSICS_OPERATOR Dec 13 2000 1:38:28:263PM . . . . . . . . . . . . . . . . . . . . DNB will be enabled from 0.5 to 0.6 s Reduced prepuff by 2 ms Increased RCUR by about 0.0025 m to reduce outer gap from 0.015 to 0.010 m Plasma to rampdown Got our change in outer gap, but with a ramp HtoD about 6% Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4924 -16.0573 -29.0508 -117.2522 dIp/dt (kA/ms): -1.5249 -3.0542 -3.5628 -8.1407 pressure (mTorr): 0.0701 0.0717 0.0686 0.0627 Bz0 (mT): -2.4326 -0.5573 0.7768 19.1557 Br0 (mT): -0.6429 -0.6825 -0.5177 -1.3319 ---------------------------------------------------------------------------- 1001213012 irby PHYSICS_OPERATOR Dec 13 2000 2:03:06:576PM . . . . . . . . . . . . . . . . . . . . No PCS changes -- assuming late h-mode from last shot was caused by cleanup of antennas/limiters following RCUR change Plasma into rampdown --- a couple of h-modes Paul seems happy... ---------------------------------------------------------------------------- 1001213013 irby PHYSICS_OPERATOR Dec 13 2000 2:20:08:140PM . . . . . . . . . . . . . . . . . . . . Reduced argon puff by 5 ms for John --- too many counts No PCS changes Plasma into rampdown --- nice long h-mode vertical instability starting around 1.15 s ---------------------------------------------------------------------------- 1001213014 irby PHYSICS_OPERATOR Dec 13 2000 2:40:00:000PM . . . . . . . . . . . . . . . . . . . . Reduced argon by another 5 ms Plasma into rampdown --- h-mode late again ---------------------------------------------------------------------------- 1001213015 irby PHYSICS_OPERATOR Dec 13 2000 3:01:19:250PM . . . . . . . . . . . . . . . . . . . . Repeat Plasma into rampdown --- 2 or 3 h-modes Looks better for Paul ---------------------------------------------------------------------------- 1001213016 irby PHYSICS_OPERATOR Dec 13 2000 3:13:50:873PM . . . . . . . . . . . . . . . . . . . . Repeat PCS Rejean is ready with j-port ---- okay at 100 kW in vacuum. This shot low power to start the tuning process Plasma to rampdown --- nice h-mode ---------------------------------------------------------------------------- 1001213017 irby PHYSICS_OPERATOR Dec 13 2000 3:37:56:920PM . . . . . . . . . . . . . . . . . . . . Repeat PCS Plasma to rampdown HtoD 5 to 7% ---------------------------------------------------------------------------- 1001213018 irby PHYSICS_OPERATOR Dec 13 2000 3:58:01:340PM . . . . . . . . . . . . . . . . . . . . Repeat PCS Plasma to rampdown j-port looking good ---------------------------------------------------------------------------- 1001213019 irby PHYSICS_OPERATOR Dec 13 2000 4:19:49:700PM . . . . . . . . . . . . . . . . . . . . PCS repeat Density into rampdown HtoD 5 to 7% Time (ms): 0 5 10 25 ---------------------------------------- % Compiled module: DERIV. Ip (kA): -0.4924 -16.0573 -31.6223 -112.0412 dIp/dt (kA/ms): -1.5260 -3.1780 -3.9421 -8.5223 pressure (mTorr): 0.0686 0.0725 0.0701 0.0627 Bz0 (mT): -3.4208 -1.0421 0.4838 19.6083 Br0 (mT): -0.6458 -0.7911 -0.9631 -1.1974 ---------------------------------------------------------------------------- 1001213020 irby PHYSICS_OPERATOR Dec 13 2000 4:43:16:700PM . . . . . . . . . . . . . . . . . . . . Plasma to rampdown j-port at 500kW but with many trips ---------------------------------------------------------------------------- 1001213021 irby PHYSICS_OPERATOR Dec 13 2000 4:58:39:170PM . . . . . . . . . . . . . . . . . . . . Plasma to rampdown HtoD up a little 6 to 7% |
| Session Leader Comments | |||
| Dec 13 2000 10:13:38:013AM | 1001213001 | Paul Bonoli | 1001213001 Start with 4.5 T and 80 MHz only for off-axis density barrier mode. Request: Waveforms from 1001212013 I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D & E on from 0.7 - 1.4 sec D - 0.5 MW E - 0.5 MW Result: Plasma ! H-mode at 0.97 sec. No density barrier mode. D & E ran entire pulse. |
| Dec 13 2000 10:45:42:937AM | 1001213002 | Paul Bonoli | 1001213002 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.75 MW E - 0.75 MW Result: Plasma ! H-modes at 0.82 and 1.1 sec. Maybe a density barrier during the second H-mode phase D - 2 faults, E - no faults 1.4 MW total |
| Dec 13 2000 10:55:44:687AM | 1001213003 | Paul Bonoli | 1001213003 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 1.00 MW E - 1.00 MW Result: Plasma Multiple H-modes, no density barrier D - multiple faults and turn-ff at 0.88 sec.; E - no faults Reduce D-port power and raise E-port power |
| Dec 13 2000 11:03:07:000AM | 1001213004 | Paul Bonoli | 1001213004 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW Result: Fizzle |
| Dec 13 2000 11:34:27:373AM | 1001213005 | Paul Bonoli | 1001213005 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW Result: Plasma - Got H-mode with some evidence of density peaking - but HIREX had a high voltage trip just as V_tor was heading for zero ! D & E antennas Square off rf pulse on next shot to get into H-mode sooner. |
| Dec 13 2000 11:58:20:513AM | 1001213006 | Paul Bonoli | 1001213006 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 1.00 MW E - 1.20 MW Result: Plasma - Early disruption at 0.91 sec. - likely cause is an impurity injection from the E-port ??? Camera views on D-port showed quiescent operation. Keep square rf pulse and back off on E-port power by 100 kW |
| Dec 13 2000 12:19:25:653PM | 1001213007 | Paul Bonoli | 1001213007 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 1.00 MW E - 1.10 MW Result: Plasma - H-mode with good density barrier - nroot_zeff increases to 7.0 X 10^20 Rf ran through Shut off E-port next shot so John Rice can check rf pick up problems on HIREX. |
| Dec 13 2000 12:38:58:700PM | 1001213008 | Paul Bonoli | 1001213008 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 1.00 MW E - 0.00 MW Result: Plasma - multiple (3) H-modes Rf ran through ok. Try one more shot with d_port power increased to 1.2 MW |
| Dec 13 2000 12:54:07:607PM | 1001213009 | Paul Bonoli | 1001213009 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 1.20 MW E - 0.00 MW Result: Plasma - H-mode Lost interferometry Multiple faults on D-port but it ran through Turn E-port back on and use rf power levels from Shot 007 -> take T_i and rotation profiles with HIREX on next 4-5 shots |
| Dec 13 2000 01:18:45:920PM | 1001213010 | Paul Bonoli | 1001213010 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW Result: Plasma - Stayed in H-mode Density barrier formed with NROOT_zeff = 7 X 10^20 D-port 2 faults; E-port a fault. Reduce plasma gap from 1.5 cm to 1.0 cm to improve antenna coupling H/D = 0.04 - 0.05 thus far today. |
| Dec 13 2000 01:45:23:577PM | 1001213011 | Paul Bonoli | 1001213011 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW Result: Plasma - Got a nice H-mode, but delayed until 1.05 sec. No density barrier D and E ran without faults. High voltage trip on HIREX H/D = 0.06-0.07 Take another shot with this plasma gap and rf power. |
| Dec 13 2000 02:11:34:437PM | 1001213012 | Paul Bonoli | 1001213012 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW Result: Plasma - Got a nice H-mode at 0.77 sec. with no delay Got a nice density barrier with NROOT_zeff = 6.5 X 10^20 D and E ran without faults. HIREX signal saturates. H/D = 0.05 Take another shot for HIREX data |
| Dec 13 2000 02:23:13:280PM | 1001213013 | Paul Bonoli | 1001213013 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW Result: Plasma - Got a single, nice H-mode Got a nice density barrier with NROOT_zeff = 6.7 X 10^20 D and E ran without faults. H/D = 0.05 Take another shot for HIREX data |
| Dec 13 2000 02:42:00:310PM | 1001213014 | Paul Bonoli | 1001213014 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW Result: Plasma - Got a nice H-mode but it was delayed until 0.96 sec. - similar to Shot 011. Still got a density barrier with NROOT_zeff = 4.8 X 10^20 D and E ran without faults. H/D = 0.05 Take shot again with same HIREX aim |
| Dec 13 2000 03:04:29:483PM | 1001213015 | Paul Bonoli | 1001213015 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW Result: Plasma - Got two H-modes. Still got a density barrier with NROOT_zeff = 5.2 X 10^20 D and E ran without faults. H/D = 0.05 - 0.06 Take shot again with same HIREX aim |
| Dec 13 2000 03:18:28:797PM | 1001213016 | Paul Bonoli | 1001213016 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW Result: Plasma - Good long H-mode ! Got a density barrier with NROOT_zeff = 6.7 X 10^20 D and E ran nicely without faults. H/D = 0.05 - 0.06 Take shot again with different HIREX aim |
| Dec 13 2000 03:37:51:857PM | 1001213017 | Paul Bonoli | 1001213017 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW Result: Plasma - Good long H-mode again! Density barrier with NROOT_zeff = 6.4 X 10^20 D and E ran nicely without faults. H/D = 0.05 - 0.06 Take another shot with HIREX aimed farther out. |
| Dec 13 2000 04:00:40:607PM | 1001213018 | Paul Bonoli | 1001213018 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW J-port turned on at 70 MHz !! Result: Plasma - Good long H-mode again! Density barrier with NROOT_zeff = 6.0 X 10^20 High voltage trip on HIREX D - port had 1 trip; and E without faults. H/D = 0.05 - 0.06 J-port coupled 200 kW for entire pulse. HIREX profile scan done. Continue to step up J-port power with 80 MHz on. |
| Dec 13 2000 04:30:49:013PM | 1001213019 | Paul Bonoli | 1001213019 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW J-port turned on 400kW Result: Plasma - Got an H-mode with 2.4 MW total power Density barrier formation arrested by J-port heating power. H/D = 0.05 - 0.06 J-port coupled 400 kW for entire pulse. Delay J-port turn-on to 1.1 sec (after density barrier forms). |
| Dec 13 2000 04:43:05:653PM | 1001213020 | Paul Bonoli | 1001213020 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.90 MW E - 1.10 MW J-port - 750 kW Result: Plasma - Got an H-mode Density increase arrested again at point where J-port turns on. H/D = 0.05 - 0.06 Test J-port heating alone by turning off D & E ports off. Ramp the J-port power. |
| Dec 13 2000 05:09:34:217PM | 1001213021 | Paul Bonoli | 1001213021 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.0 MW E - 0.0 MW J-port - power ramp up to 750 kW Result: Plasma - Got dithering until 1.15 sec, then plasma went into H-mode. Evidence of rapid density increase in NROOT_zeff from (2-4) X 10^20 H/D = 0.05 - 0.06 J-port ramped up to 600 kW and the had faults. Some evidence of central electron heating on GPC. |
| Dec 13 2000 05:14:56:873PM | 1001213022 | Paul Bonoli | 1001213022 Request: I_p = 800 kA, 4.5T, nl_04 = 0.8 (for target) D - 0.0 MW E - 0.0 MW J-port - power ramp up more gradually. Result: Plasma - Got dithering until 1.03 sec, then plasma went into H-mode. J-port ramped up to 500 kW and then had faults. Again Some evidence of central electron heating on GPC at J-port turn-on. |
| Physics Operator Comments | |||
| Dec 13 2000 07:28:54:890AM | Jim Irby | Engineering setup for run 1001213 MP #277A Internal Transport Barrier Studies at 4.5 T with Simultaneous and Off-Axis ICRF Heating Session leader : Bonoli Physics operator: Irby ECDC in D2 overnight Power systems as on 1001212013 Gas setup: fill B-top with 6 psi of D2 Hybrid enabled fill B-side lower with 1 psi of Ar Hybrid DISABLED fill B-side upper with 35 psi of D2 Hybrid DISABLED, for ECDC fill C-side with 30 psi of D2 Hybrid enabled leave J-bot as is Hybrid DISABLED Enable the following gate valves: ECE, VUV, Beast, DNB RF Setup: XMTRs 1,2, and 4 should be made ready for operation by 8:00 Run starts at 09:00 and ends at 17:00. | |
| Dec 13 2000 08:14:25:763AM | Jim Irby | did CCL remcam for grins Cold start okay rtnode -- data loaded, A matrix responds rtnode -- data loaded, M matrix responds rtnode -- data loaded, PID matrix responds RT_NODE Done 13-DEC-2000 07:39:38.63 Last shot from yesterday: 1001212013 Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4924 -13.4632 -31.6223 -109.4697 dIp/dt (kA/ms): -1.2716 -3.0531 -3.0542 -7.7593 pressure (mTorr): 0.0715 0.0723 0.0683 0.0668 Bz0 (mT): -3.0906 -0.7134 1.0919 18.9428 Br0 (mT): -0.2359 -0.7572 -1.0693 -2.1846 | |
| Dec 13 2000 10:19:30:093AM | 1001213001 | Jim Irby | Started about an hour late to give the RF guys time to fix the arc in the gas block at j-port. Will pump and purge j-port while we get going with D and E. Startup from 1001212013 Plasma to rampdown H-mode with less than 1 MW D+E Startup not too pretty Ip (kA): -0.4697 -13.4404 -29.0054 -65.3463 dIp/dt (kA/ms): -1.2717 -2.9282 -2.2901 -4.0715 pressure (mTorr): 0.0577 0.0590 0.0564 0.0632 Bz0 (mT): -4.7479 -1.2180 -0.1831 17.9265 Br0 (mT): -0.7205 -1.0088 -1.0090 -1.6193 |
| Dec 13 2000 10:32:54:327AM | 1001213002 | Jim Irby | Added 2 ms to prepuff asking for a little more RF power Plasma to rampdown Better looking H-Mode RF power to abt 1.4 MW Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4924 -16.0346 -26.4112 -99.0477 dIp/dt (kA/ms): -1.6554 -2.7965 -2.5455 -6.7386 pressure (mTorr): 0.0715 0.0748 0.0748 0.0715 Bz0 (mT): -4.8656 -2.5432 0.6353 18.5165 Br0 (mT): -0.9701 -0.9132 -1.0259 -2.3500 Bz continues it's random walk Reports of ITB on second h-mode |
| Dec 13 2000 10:48:55:623AM | 1001213003 | Jim Irby | No PCS changes Plasma to rampdown D-port didn't stay on |
| Dec 13 2000 11:17:38:827AM | 1001213004 | Jim Irby | Took 1 ms off pulsed gas Fizzle --- Br? Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4924 -16.0346 -29.0054 -23.8171 dIp/dt (kA/ms): -1.5282 -2.7954 -1.7803 0.6369 pressure (mTorr): 0.0756 0.0791 0.0748 0.0715 Bz0 (mT): -2.9320 -1.3481 0.0881 17.2264 Br0 (mT): -1.0138 -1.0085 -1.3326 -1.1475 |
| Dec 13 2000 11:35:49:843AM | 1001213005 | Jim Irby | Changed Br offset to 0.0015 from 0.0013 T Reduced gas prepuff by another 1 ms Plasma into rampdown RF okay, h-modes, HtoD 4 to 5% Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4924 -16.0573 -29.0281 -109.4470 dIp/dt (kA/ms): -1.5249 -2.7976 -3.5606 -7.6310 pressure (mTorr): 0.0676 0.0668 0.0653 0.0632 Bz0 (mT): -1.8579 0.2718 1.6071 21.5654 Br0 (mT): -0.8195 -0.8962 -1.2316 -2.0872 Pressure and Br better |
| Dec 13 2000 11:58:24:343AM | 1001213006 | Jim Irby | No PCS changes Disruption at 0.92 s --- more RF power? Startup looks good HtoD 4 to 5% |
| Dec 13 2000 12:24:55:140PM | 1001213007 | Jim Irby | No PCS changes --- a little less e-port Plasma to 1.5 s Startup okay |
| Dec 13 2000 12:40:01:373PM | 1001213008 | Jim Irby | No PCS changes Plasma to rampdown |
| Dec 13 2000 12:59:33:327PM | 1001213009 | Jim Irby | repeat plasma to rampdown Lost most TCI channels ---- laser unstable. |
| Dec 13 2000 01:07:35:450PM | 1001213010 | Jim Irby | No changes plasma to 1.47 s |
| Dec 13 2000 01:38:28:263PM | 1001213011 | Jim Irby | DNB will be enabled from 0.5 to 0.6 s Reduced prepuff by 2 ms Increased RCUR by about 0.0025 m to reduce outer gap from 0.015 to 0.010 m Plasma to rampdown Got our change in outer gap, but with a ramp HtoD about 6% Time (ms): 0 5 10 25 ---------------------------------------- Ip (kA): -0.4924 -16.0573 -29.0508 -117.2522 dIp/dt (kA/ms): -1.5249 -3.0542 -3.5628 -8.1407 pressure (mTorr): 0.0701 0.0717 0.0686 0.0627 Bz0 (mT): -2.4326 -0.5573 0.7768 19.1557 Br0 (mT): -0.6429 -0.6825 -0.5177 -1.3319 |
| Dec 13 2000 02:03:06:577PM | 1001213012 | Jim Irby | No PCS changes -- assuming late h-mode from last shot was caused by cleanup of antennas/limiters following RCUR change Plasma into rampdown --- a couple of h-modes Paul seems happy... |
| Dec 13 2000 02:20:08:140PM | 1001213013 | Jim Irby | Reduced argon puff by 5 ms for John --- too many counts No PCS changes Plasma into rampdown --- nice long h-mode vertical instability starting around 1.15 s |
| Dec 13 2000 02:40:00:000PM | 1001213014 | Jim Irby | Reduced argon by another 5 ms Plasma into rampdown --- h-mode late again |
| Dec 13 2000 03:01:19:250PM | 1001213015 | Jim Irby | Repeat Plasma into rampdown --- 2 or 3 h-modes Looks better for Paul |
| Dec 13 2000 03:13:50:873PM | 1001213016 | Jim Irby | Repeat PCS Rejean is ready with j-port ---- okay at 100 kW in vacuum. This shot low power to start the tuning process Plasma to rampdown --- nice h-mode |
| Dec 13 2000 03:37:56:920PM | 1001213017 | Jim Irby | Repeat PCS Plasma to rampdown HtoD 5 to 7% |
| Dec 13 2000 03:58:01:340PM | 1001213018 | Jim Irby | Repeat PCS Plasma to rampdown j-port looking good |
| Dec 13 2000 04:19:49:700PM | 1001213019 | Jim Irby | PCS repeat Density into rampdown HtoD 5 to 7% Time (ms): 0 5 10 25 ---------------------------------------- % Compiled module: DERIV. Ip (kA): -0.4924 -16.0573 -31.6223 -112.0412 dIp/dt (kA/ms): -1.5260 -3.1780 -3.9421 -8.5223 pressure (mTorr): 0.0686 0.0725 0.0701 0.0627 Bz0 (mT): -3.4208 -1.0421 0.4838 19.6083 Br0 (mT): -0.6458 -0.7911 -0.9631 -1.1974 |
| Dec 13 2000 04:43:16:700PM | 1001213020 | Jim Irby | Plasma to rampdown j-port at 500kW but with many trips |
| Dec 13 2000 04:58:39:170PM | 1001213021 | Jim Irby | Plasma to rampdown HtoD up a little 6 to 7% |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 10:07:05:467AM | Plasma | Ok | |
| 2 | 10:23:48:967AM | Plasma | Ok | |
| 3 | 10:40:20:547AM | Plasma | Ok | |
| 4 | 10:57:09:450AM | Plasma | Ok | |
| 5 | 11:22:00:950AM | Plasma | Ok | |
| 6 | 11:42:11:327AM | Plasma | Ok | |
| 7 | 12:02:07:577PM | Plasma | Ok | |
| 8 | 12:23:05:077PM | Plasma | Ok | |
| 9 | 12:41:24:500PM | Plasma | Ok | |
| 10 | 01:02:20:373PM | Plasma | Ok | |
| 11 | 01:25:56:390PM | Plasma | Ok | |
| 12 | 01:48:44:200PM | Plasma | Ok | |
| 13 | 02:08:27:280PM | Plasma | Ok | |
| 14 | 02:27:51:920PM | Plasma | Ok | |
| 15 | 02:42:09:623PM | Plasma | Ok | |
| 16 | 03:04:23:077PM | Plasma | Ok | |
| 17 | 03:23:19:530PM | Plasma | Ok | |
| 18 | 03:44:22:467PM | Plasma | Ok | |
| 19 | 04:04:31:187PM | Plasma | Ok | |
| 20 | 04:25:49:013PM | Plasma | Ok | |
| 21 | 04:45:17:793PM | Plasma | Ok | |
| 22 | 05:04:17:763PM | Plasma | Ok | |