| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Yuichi Takase,John Goetz |
| Physics operator(s): | John Goetz |
| Engineering operator(s): | Joe Daigle,Vinny Bertolino |
| Engineering Operator Run Comment |
| icrf tuning |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:11:493PM |
| Author: To Be Determined |
| Session Leader's Summary for 941208 SL: Takase PO: Goetz EO: Daigle MP052A ICRF Tuning MP054A ICRF Conditioning 1st RF run of Phase II-B (D-port antenna only). Start from 941206024 (Inner-wall limited, up-down symmetric). Objective: Establish tune, then bring up power (constant shots). We have achieved more than we anticipated, thanks to previous experience and piggy-backing on yesterday's run: Acceptable tuning was achieved on shot 003. RF power was brought up to approximately 1.8MW. In addition: A high triangularity limiter plasma was developed (for example, 941208026). CX now sees H signals correlated with H puffs. Started developing a diverted plasma with better match to the antenna. Technical problems: \RF_POWER_NET should not be trusted for shots 010-025. RF CAMAC had noise and malfunction problems at high RF power levels. HIREX sees more RF pick-up than last year. Shot 001 fizzle 002 plasma 820kA nel_05=0.85 oright=3->3.5cm working on tuning 003 plasma nel_05=0.85 oright=1.5->2.3cm good tune 004 fizzle 005 plasma nel_05=0.85->0.80 P_rf=30kW good tune 006 fizzle 007 fizzle P_rf=3kW at breakdown 008 plasma P_rf=70kW, nel still dropping, oright stable at 2cm 009 plasma P_rf=270kW, R_L constant after 0.5sec 010 plasma P_rf=320kW (\RF_POWER_NET starting to saturate) 011 plasma P_rf=800kW 012 plasma P_rf>1MW (something happened on the antenna? or noise?) 013 plasma P_rf=800kW 014 plasma P_rf=900kW 015 plasma P_rf=1.0MW 016 plasma P_rf=1.0MW (attenuators back in, but CAMAC problem) 017 plasma P_rf=1.2MW (still have CAMAC problem) 018 plasma P_rf=1.4MW (power meas. fixed, but have noise problem) 019 plasma P_rf=1.5MW (CAMAC problem) 020 plasma P_rf=1.5MW (CAMAC problem) 021 plasma P_rf=1.6MW (CAMAC problem) 022 plasma P_rf=1.6MW (CAMAC problem) 023 plasma P_rf=1.7MW (CAMAC problem) 024 plasma P_rf=1.8MW (CAMAC problem), nel_05=1.0 025 plasma P_rf=1.7MW (CAMAC problem), nel_05=0.95, H 100V X .2s @ .3s 026 plasma P_rf=1.6MW (CAMAC worked!), nel_05=0.95, H 100V X .4s @ .3s 027 plasma P_rf=1.4MW Diverted (H-mode), nel_05=0.95, no H puff 028 plasma disrupted @ .44s |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:52:427PM |
| Author: To Be Determined |
| Physics operator summary for 941208 EO: Bertilino/Daigle PO: Goetz SL: Takase Run 941208 was in support of Mini-Proposal #052A - ICRF Tuning. This proposal calls for a load for the RF antenna at D-Port. To this end, shot 941206024 was loaded into the hybrid. This was a limiter discharge that had an acceptable equilbrium. Today's goal was to try to obtain shots suitable as a load for the antenna. This goal was accomplished and then some. The RF cabal obtained plasmas suitable for loading studies and moved on to conditioning. A maximum of 1.7MW was put in the plasma. Reproducible shots were obtained. The first 26 shots were limited shots with successively higher triangularity (as requested by the session leader). The last two shots were divertor discharges. Some things discovered today: 1) The beginning of the run was beset with fizzles. This may have been the result of no ECDC before the run. It turns out that the current was rising too quickly. This was solved by some combination of higher fill pressure and more gain on the RCUR wire in segment 1. 2) Limiter plasmas with triangularity <=0.5 were obtained. See shots up to 941208026 for examples. This was accomplished with CLEARIN, ZXU, ZXL, RXU, and RXL programming. 2) Be wary of asking for an unworkable combination of RCUR and CLEARIN, given the EF2 current limit (see shot 941208028 for example). Engineering today: Reliable day today for the power systems. PCS did not load the V's when IMPORT_SEGMENT was used. Josh fixed this bug. Scorecard: 28 shots = 24 plasmas + 4 fizzles Shot summary for Run 941208 Reload of 941206024 Changes to shot 941206024: NL_07=8.0e19 fizzle detector off at 1.5sec add I gain to CLEARIN =02.5 at 0.05sec RCUR offset = 10000. in segment 2 & change drawn waveform by 10000/800000 & remove notch in D gain Shot change result ____ _____ ______ 1 P_0 = 1.5e-5 fizzle - fields look o.k. 2 P_0 = 1.3e-5 plasma - disr. at 1.17 outer gap = 3.5cm EF2's on the rail 3 RCUR = .657 in segment 2 plasma - disr. at 1.13 EF2's off the rail outer gap=2->2.3cm; kappa=1.45 4 slow down Ip ramp down fizzle - moves out and hits @ less delta RCUR during ramp-down .017sec slide PG3 -.003sec 5 no changes plasma - 0.83MA - disr @ 1.43 outer gap 2->2.3cm 6 PG1 @ 0.3 (90V x .02sec) fizzle - hits at .02sec less delta RCUR during ramp-down ramp up programmed density ramp RCUR to .659 @ 1.0sec 7 lower RCUR D gain to 2 @ .02sec fizzle - hits at .018sec 8 RCUR=.66 in segment 1 plasma - .83MA RCUR D gain to 4 @ .02sec outer gap 1.9->2.0cm P_0 = 1.4e-5 density falling; loading falling 9 ramp density to .925e20 plasma - .83MA - inversion time P_0=1.5e-5 .25MW RF; outer gap 1.95cm RCUR P=6 and D=5 @ .015 density stays up 10 RXU & RXL = -.017 for more triang. plasma - .83MA - invert time no change in triangularity 11 RXL & RXU = -.019 plasma - .83MA ZXL=-.018 & ZXU=.023 RF in ~ 0.6MW delta Te ~ 0.3keV 12 widen PG1 to .023sec plasma - .83MA P gain on RXL & RXU = 5 RF ~ 1.0MW; delta Te ~ 0.5keV no change in triangularity 13 RXL & RXU = -.022 plasma - .83MA RF~0.8MW; delta Te ~ 0.3keV 14 CLEARIN=-.04 plasma - .83MA RF~1.2MW; delta Te~0.5keV 15 CLEARIN=-.035 & ZXU=-.025 plasma - .83MA RF~1.3MW; delta Te~0.5keV triangularity = 0.4 16 ZXL=-.025 & ZXU=.03 plasma - .84MA RF~1.0MW; delta Te~0.6keV triang=.4 - kappa=1.6 17 RXL=-.025 & RXU=-.030 plasma - .83MA RF~1.2MW; delta Te~0.6keV 18 no changes plasma - .83 MA RF~1.4MW; delta Te~0.7keV 19 no changes plasma - .83MA RF~1.4MW; delta Te~.75keV 20 no changes plasma - .83MA RF~1.5MW; delta Te~0.8keV 21 RXU=-.035 plasma - .83MA RF~1.5MW; delta Te~0.7keV upper_tri=0.5 lower_tri=0.4 22 no changes plasma - .83MA RF~1.7MW; delta Te~0.7keV 23 no changes plasma - .83MA RF~1.6MW; delta Te~0.8keV 24 nel_04=1.05e20 plasma - .83MA RF trips on high refl. power 25 nel_04=.925e20 plasma - .83MA PG2=(100Vx.02) @ 0.3sec RF~1.7MW; delta Te~.75keV 26 PG2=(100V x .04sec) @ 0.3sec plasma - .83MA RF~1.7MW; delta Te~.7keV 27 loaded seg 2 from 941206025 into plasma - .83MA - diverted segment 2 (PCS bug - didn't load RF~1.5MW; delta Te~0.5keV the V's; Josh fixed) loading reduced nel_04=.925e20; RCUR=.652; slow Ip ramp 28 RCUR=0.64 until 0.4sec (was on limiter) plasma - disrupts @ 0.43 RCUR=.652 from 0.5sec on too much delta_RCUR for CLEARIN |
| Session Leader Comments | |||
| Dec 8 1994 08:59:38:880AM | 941208001 | Yuichi Takase | 1st RF run of Phase II-B
Start from 941206024 (Inner-wall limited, up-down symmetric). D-port antenna only. Establish tune, then bring up power (constant shots). Shot 001: fizzle |
| Dec 8 1994 09:41:52:050AM | 941208002 | Yuichi Takase | Shot 002
Plasma 820kA nel_05=0.85 oright=3->3.5cm working on tuning move plasma out for next shot (want oright=2cm) |
| Dec 8 1994 09:44:20:400AM | 941208003 | Yuichi Takase | Shot 003
Plasma nel_05=0.85 oright=1.5->2.3cm good tune |
| Dec 8 1994 09:48:34:060AM | 941208004 | Yuichi Takase | Shot 004
Fizzle Will be increasing RF power for the next few shots. |
| Dec 8 1994 10:14:57:610AM | 941208005 | Yuichi Takase | Shot 005
Plasma Bringing the RF power up. P_rf=30kW |
| Dec 8 1994 10:23:17:980AM | 941208006 | Yuichi Takase | Shot 006
Fizzle |
| Dec 8 1994 10:43:03:990AM | 941208007 | Yuichi Takase | Shot 007
Fizzle RF at breakdown (3kW) |
| Dec 8 1994 11:13:16:210AM | 941208008 | Yuichi Takase | Shot 008
Plasma Density still dropping, oright stable at 2cm P_rf=70kW |
| Dec 8 1994 11:25:32:470AM | 941208009 | Yuichi Takase | Shot 009
Plasma P_rf=270kW, R_L constant after 0.5sec |
| Dec 8 1994 11:50:26:630AM | 941208010 | Yuichi Takase | Shot 010
Plasma P_rf=320kW Beware: \RF_POWER_NET not correct beyond this power (today only) |
| Dec 8 1994 12:21:32:770PM | 941208011 | Yuichi Takase | Shot 011
Plasma P_rf=800kW |
| Dec 8 1994 12:23:01:340PM | 941208012 | Yuichi Takase | Shot 012
Plasma P_rf>1MW (don't have reliable power meas.) Something happened on the antenna, or have noise problem |
| Dec 8 1994 12:24:10:500PM | 941208013 | Yuichi Takase | Shot 013
Plasma P_rf=.8MW |
| Dec 8 1994 12:50:22:090PM | 941208014 | Yuichi Takase | Shot 014
Plasma P_rf=.9MW |
| Dec 8 1994 12:59:03:680PM | 941208015 | Yuichi Takase | Shot 015
Plasma P_rf=1.0MW |
| Dec 8 1994 01:39:31:070PM | 941208016 | Yuichi Takase | Shot 016
Plasma Power measurement fixed (put attenuators back in). But have CAMAC problem. P_rf=1.0MW |
| Dec 8 1994 02:00:53:710PM | 941208017 | Yuichi Takase | Shot 017
Plasma Still have CAMAC problem. P_rf=1.2MW |
| Dec 8 1994 02:09:01:310PM | 941208018 | Yuichi Takase | Shot 018
Plasma P_rf=1.4MW (power meas. fixed, but have noise problem) |
| Dec 8 1994 03:06:16:620PM | 941208019 | Yuichi Takase | Shot 019
Plasma P_rf=1.5MW (CAMAC problem) |
| Dec 8 1994 03:06:51:170PM | 941208020 | Yuichi Takase | Shot 020
Plasma P_rf=1.5MW (CAMAC problem) |
| Dec 8 1994 03:07:50:710PM | 941208021 | Yuichi Takase | Shot 021
Plasma P_rf=1.6MW (CAMAC problem) |
| Dec 8 1994 03:11:34:830PM | 941208022 | Yuichi Takase | Shot 022
Plasma P_rf=1.6MW (CAMAC problem) |
| Dec 8 1994 03:38:27:460PM | 941208023 | Yuichi Takase | Shot 023
Plasma P_rf=1.7MW (CAMAC problem) |
| Dec 8 1994 04:08:55:980PM | 941208024 | Yuichi Takase | Shot 024
Plasma A little higher density, nel_05=1.0 P_rf=1.8MW (CAMAC problem) |
| Dec 8 1994 04:13:51:280PM | 941208025 | Yuichi Takase | Shot 025
Plasma nel_05=0.9, H 100V X .2s @ .3s P_rf=1.7MW (CAMAC problem) |
| Dec 8 1994 04:41:42:660PM | 941208026 | Yuichi Takase | Shot 026
Plasma nel_05=0.95, H 100V X .4s @ .3s P_rf=1.6MW (CAMAC worked) |
| Dec 8 1994 04:56:09:940PM | 941208027 | Yuichi Takase | Shot 027
Plasma, Diverted, H-mode nel_05=0.95, no H puff P_rf=1.4MW (CAMAC worked), R_L=4.5Ohm |
| Dec 8 1994 05:16:57:330PM | 941208028 | Yuichi Takase | Shot 028
Plasma, Diverted, disrupted @ 0.44s |
| Physics Operator Comments | |||
| Dec 8 1994 08:20:26:010AM | John Goetz | Run 941208
In support of Mini-Proposal #052A - ICRF Tuning The objectives of this proposal are too just get plasmas to be the load for the RF antenna at D-port. Start from Shot 941206024 - a limiter discharge Changes: Nel_04=0.8e20 RCUR offset = 10000 in segment 2 and change the drawn waveform by 10000/800000 and remove the notch in the D gain fizzle detector off at 1.5sec I gain on CLEARIN = 0.25 @ .05sec Hybrid initialization - all matrices respond. | |
| Dec 8 1994 09:03:38:580AM | 941208001 | John Goetz | Shot 941208001
Fizzle - fields looked o.k. For shot 941208002: P_0 = 1.3e-5 |
| Dec 8 1994 09:21:41:320AM | 941208002 | John Goetz | Shot 941208002
Plasma - disruption @ 1.17sec outer gap = 3.5cm EF2's on the rail - leads to the loss of vertical position For shot 941208003: RCUR = 0.657 in segment 2 (close outer gap) CLEARIN = -.045 (to help EF2's) |
| Dec 8 1994 09:42:11:640AM | 941208003 | John Goetz | Shot 941208003
Plasma - disruption @ 1.13sec outer gap = 2 -> 2.3cm kappa = 1.45 EF2's off the rail For shot 941208004: slide PG3 -.003sec slow down Ip rampdown don't pull the plasma in as far during rampdown |
| Dec 8 1994 09:53:31:360AM | 941208004 | John Goetz | Shot 941208004
Fizzle - plasma moves out and hits at .017 For shot 941208005: no changes |
| Dec 8 1994 10:14:42:650AM | 941208005 | John Goetz | Shot 941208005
Plasma - 0.83MA - disr @ 1.43sec outer gap = 2.0->2.3cm For shot 941208006: ramp up programmed density enable B_SIDE_LOWER - PG1 puff at 0.3 (90V x .02sec) less delta RCUR during ramp-down ramp RCUR to .659 at 1.0 sec to hold outer gap constant |
| Dec 8 1994 10:28:34:860AM | 941208006 | John Goetz | Shot 941208006
Fizzle - moves out and hits at .02sec For shot 941208007: lower RCUR D gain to 2 at 0.02sec |
| Dec 8 1994 10:42:28:670AM | 941208007 | John Goetz | Shot 941208007
Fizzle - moves out and hits at .018sec current is rising quickly For shot 941208008: raise RCUR D gain to 4 at 0.02sec RCUR drawn waveform = .66 in segment 1 P_0 = 1.4e-5 |
| Dec 8 1994 11:07:16:750AM | 941208008 | John Goetz | Shot 941208008
Plasma - 0.83MA moves out more slowly during startup than 007 outer gap 1.9->2.0cm density falling - loading drops For shot 941208009: raise RCUR P gain to 6 @ .015 sec raise RCUR D gain to 5 at 0.015sec RCUR drawn waveform = .65 in segment 1 P_0 = 1.5e-5 ramp up density waveform to .925e20 |
| Dec 8 1994 11:25:25:000AM | 941208009 | John Goetz | Shot 941208009
Plasma - 0.83MA moves out more slowly during startup than 008 ( and 007) outer gap 1.9->2.0cm density better 0.25MW injected RF For shot 941208010: RXL & RXU = -.017 (were -.015) to raise triangularity |
| Dec 8 1994 11:43:29:050AM | 941208010 | John Goetz | Shot 941208010
Plasma - 0.83MA outer gap 1.9->2.1cm no change in triangularity 0.32MW injected RF For shot 941208011: RXL & RXU =-.019; ZXU=.023; ZXL=-.018 to increase triangularity |
| Dec 8 1994 12:15:13:170PM | 941208011 | John Goetz | Shot 941208011
Plasma - 0.83MA outer gap 1.9cm no change in triangularity 0.6MW injected RF - shows up on many traces For shot 941208012: widen PG1 to .023sec P gain on RXL & RXU = 5 (was 3) |
| Dec 8 1994 12:16:22:710PM | 941208012 | John Goetz | Shot 941208012
Plasma - 0.83MA outer gap 1.9cm no change in triangularity 1.0MW injected RF - shows up on many traces delta Te ~ 0.5keV For shot 941208013: RXL & RXU = -.022 |
| Dec 8 1994 12:35:16:910PM | 941208013 | John Goetz | Shot 941208013
Plasma - 0.83MA outer gap 1.9->2.1cm no change in triangularity 0.8MW injected RF - delta Te ~ 0.3keV For shot 941208014: CLEARIN=-.04 (to change triangularity) |
| Dec 8 1994 12:49:09:270PM | 941208014 | John Goetz | Shot 941208014
Plasma - 0.83MA outer gap 2.0cm triangularity increases to 0.4 1.2MW injected RF - delta Te ~ 0.5keV For shot 941208015: CLEARIN=-.035 and ZXU=-.025 (to change triangularity) |
| Dec 8 1994 01:17:22:260PM | 941208015 | John Goetz | Shot 941208015
Plasma - 0.83MA outer gap 1.9->2.0cm triangularity = 0.4 1.3MW injected RF - delta Te ~ 0.5keV For shot 941208016: ZXL=-.025 & ZXU=+.03 (for triangularity) |
| Dec 8 1994 01:38:51:280PM | 941208016 | John Goetz | Shot 941208016
Plasma - 0.83MA outer gap 1.9->2.0cm triangularity = 0.4 - kappa = 1.6 1.0MW injected RF - delta Te ~ 0.6keV For shot 941208017: RXL=-.025 & RXU=-.03 (for triangularity) |
| Dec 8 1994 01:56:21:340PM | 941208017 | John Goetz | Shot 941208017
Plasma - 0.83MA 1.2MW injected RF - delta Te ~ 0.6keV EFIT didn't run - no delta nor kappa to report For shot 941208018: no changes |
| Dec 8 1994 02:16:12:250PM | 941208018 | John Goetz | Shot 941208018
Plasma - 0.83MA 1.4MW injected RF - delta Te ~ 0.7keV triang=0.5->0.4; kappa=1.6 For shot 941208019: no changes |
| Dec 8 1994 02:30:27:220PM | 941208019 | John Goetz | Shot 941208019
Plasma - 0.83MA 1.4MW injected RF - delta Te ~ 0.75keV triang=0.5->0.4; kappa=1.6; outer gap =2.0cm For shot 941208020: no changes |
| Dec 8 1994 02:45:05:160PM | 941208020 | John Goetz | Shot 941208020
Plasma - 0.83MA 1.5MW injected RF - delta Te ~ 0.8keV triang=0.5->0.4; kappa=1.6; outer gap =2.0cm For shot 941208021: RXU=-.035 |
| Dec 8 1994 03:02:50:640PM | 941208021 | John Goetz | Shot 941208021
Plasma - 0.83MA 1.5MW injected RF - delta Te ~ 0.7keV triang=0.5(upper)->0.4(lower); kappa=1.6; outer gap =2.0cm For shot 941208022: no changes |
| Dec 8 1994 03:19:11:240PM | 941208022 | John Goetz | Shot 941208022
Plasma - 0.83MA 1.7MW injected RF - delta Te ~ 0.7keV triang=0.5(upper)->0.4(lower); kappa=1.6; outer gap =2.0cm For shot 941208023: no changes |
| Dec 8 1994 03:40:09:220PM | 941208023 | John Goetz | Shot 941208023
Plasma - 0.83MA 1.6MW injected RF - delta Te ~ 0.8keV triang=0.5(upper)->0.4(lower); kappa=1.6; outer gap =2.0cm For shot 941208024: nel_04=1.05e20 |
| Dec 8 1994 03:59:21:590PM | 941208024 | John Goetz | Shot 941208024
Plasma - 0.83MA RF trips on high reflected power nel_04=1e20 For shot 941208025: nel_04=.925e20 enable B_SIDE_UPPER PG2 @ 0.3sec (100V x .02sec) |
| Dec 8 1994 04:14:08:950PM | 941208025 | John Goetz | Shot 941208025
Plasma - 0.83MA RF~1.7MW; delta Te~0.75keV For 941208026: no changes |
| Dec 8 1994 04:40:01:770PM | 941208026 | John Goetz | Shot 941208026
Plasma - 0.83MA RF~1.7MW; delta Te~0.7keV For 941208027: loaded segment 2 from 941206025 into segment 2 (a diverted shot) set RCUR = .652 Ip rampdown slowed nel_04=.925e20 |
| Dec 8 1994 04:57:59:540PM | 941208027 | John Goetz | Shot 941208027
Plasma - 0.83MA (diverted) RF~1.5MW; delta Te~0.5keV; loading reduced outer gap ~ 2.0cm For 941208028: RCUR=.654cm (shrink outer gap) RCUR=.64cm until 0.4sec (was touching limiter) |
| Dec 8 1994 05:41:11:660PM | 941208028 | John Goetz | Shot 941208028
Plasma - disrupts @ 0.43sec vertical instability asked for too much delta_RCUR for the given CLEARIN |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:50:28:990AM | Plasma | Ok | no faults |
| 2 | 09:02:43:180AM | Plasma | Ok | disruption induced comm faults on oh1 and oh2l |
| 3 | 09:20:00:390AM | Plasma | Ok | disruption induced comm faults, oh1 and oh2l |
| 4 | 09:42:50:980AM | Plasma | Ok | no faults |
| 5 | 09:55:05:680AM | Plasma | Ok | disruption induced comm faults, oh1, oh2l and ef1u |
| 6 | 10:14:23:370AM | Plasma | Ok | no faults |
| 7 | 10:28:51:500AM | Plasma | Ok | no faults |
| 8 | 10:43:16:940AM | Plasma | Ok | no faults |
| 9 | 11:09:49:410AM | Plasma | Ok | no faults |
| 10 | 11:25:23:220AM | Plasma | Ok | no faults |
| 11 | 11:43:32:000AM | Plasma | Ok | no faults |
| 12 | 12:01:01:640PM | Plasma | Ok | no faults |
| 13 | 12:17:22:110PM | Plasma | Ok | no faults |
| 14 | 12:32:36:300PM | Plasma | Ok | no faults |
| 15 | 12:49:49:170PM | Plasma | Ok | no faults |
| 16 | 01:23:15:550PM | Plasma | Ok | No Faults. |
| 17 | 01:40:27:880PM | Plasma | Ok | No Faults |
| 18 | 01:56:57:290PM | Plasma | Ok | No Faults. |
| 19 | 02:15:54:460PM | Plasma | Ok | No faults. |
| 20 | 02:30:41:430PM | Plasma | Ok | No faults. |
| 21 | 02:47:33:110PM | Plasma | Ok | No faults |
| 22 | 03:04:27:030PM | Plasma | Ok | No faults. |
| 23 | 03:22:30:000PM | Plasma | Ok | No Faults. |
| 24 | 03:43:25:360PM | Plasma | Ok | No Faults. |
| 25 | 04:00:33:660PM | Plasma | Ok | No faults. |
| 26 | 04:20:01:620PM | Plasma | Ok | NO Faults. |
| 27 | 04:41:28:200PM | Plasma | Ok | no faults |
| 28 | 04:58:42:660PM | Plasma | Ok | No Faults |