| Miniproposals | ||||||||||||
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| Operators | |
| Session leader(s): | Rejean Boivin,Steve Wukitch |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Gary Dekow |
| Engineering Operator Run Comment |
| yes |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:23:273PM |
| Author: To Be Determined |
| Setup for run 1000510 Run to start at 09:00 and end at 17:00. MP # 268 ICRF commissioning SL: Boivin/Goetz PO: Marmar Engineering: ------------ ECDC overnight in D2, turn off 2 hours before run Power system setup as on 1000509003 OH and TF fizzle delays of 300 and 400 ms. Gas setup - fill B-top 6 psi of D2 Hybrid enabled fill B-side lower 1 psi of Ar Hybrid enabled leave B-side upper as is Hybrid DISABLED fill C-side 30 psi of D2 Hybrid enabled leave J-bottom as is Hybrid DISABLED The following gate valves should be enabled, assuming there are no vacuum problems: VUV ECE DNB Objectives: ----------- 1. Characterize J-port antenna under various conditions. 2. Operate D and E-port antennas with SF6 in PS/ST 3. Investigate D, E and J antenna operations with various edge densities Run Plan: --------- 1. BT scan 4.8, 5.0, 5.2, 5.4, 5.6 T @ 1 MA 2. phase scan between J3 and J4 3. Ip scan 0.8, 1.0, 1.2 MA 4. outer gap scan [1.5,1.0,0.5] cm Shot Summary 001 plasma late H-mode J3: ramp to 0.4 MW and step to 0.8 MW J4: ramp to 0.4 MW and step to 0.8 MW, faults with H-mode right gap is 1.1-1.2 cm nl~1x20 m^2 BT=5.2 T next shot: repeat with right gap of 1.0 cm 002 fizzle next shot: repeat 001 with right gap of 1.0 cm J3: ramp to 0.4 MW, step to .55 MW and step to 0.8 MW J4: ramp to 0.4 MW, step to .55 MW and step to 0.8 MW changed the feedback integrator time constant to 5 msec from 1 msec 003 plasma with H-modes BT=5.2 T @1 MA nl=1.x10^20 next shot: BT to 5.0 T J3: ramp to 0.4 MW, step to .55 MW, step to 0.8 MW and step to 1 MW J4: ramp to 0.4 MW, step to .55 MW and step to 0.8 MW and step to 1 MW 004 plasma early disruption ~1.01 sec BT=5.0 T @1 MA nl=1.x10^20 next shot: repeat J3: ramp to 0.4 MW, step to .55 MW, step to 0.8 MW and step to 1 MW J4: ramp to 0.4 MW, step to .55 MW, step to 0.8 MW and step to 1 MW J3 integrator time constant to 15 msec from 5 msec 005 plasma early disruption ~0.9 sec BT=5.0 T @1 MA nl=1.x10^20 next shot: BT to 5.4 T 006 H mode at 1.1 sec, Elmfree (a lot of dither before that even in ohmic) another one at 1.27 J3: ramp to 0.4 MW, step to .55 MW, step to 0.8 MW and step to 1 MW J4: ramp to 0.4 MW, step to .55 MW, step to 0.8 MW and step to 1 MW BT=5.4 T @1 MA nl=1.x10^20 007 Didn't like this field . J3 tripped 3 times at 1.15 seconds, and should have tripped after that but didn't. Arc between DC1 and DC2. J3 xbarred, FPA screen overload after the shot. J4 had 9 trips a1.15 seconds J3: ramp to 0.4 MW, step to .55 MW, step to 0.8 MW and step to 1 MW J4: ramp to 0.4 MW, step to .55 MW, step to 0.8 MW and step to 1 MW BT=5.6T @1 MA nl=1.x10^20 next shot: return to 5.2 T to start phase scan 008 early disruption (0.19 sec) 009 plasma - early disruption (~0.9) next shot: repeat RF with larger outer gap (1.2 cm) 010 plasma - early disruption (~0.9) next shot: change BT to 5.4 T nl=1.0x10^20 cm^2 Ip= 0.8 MA 011 plasma - early disruption (~0.68 sec) J3 gave more power than programmed due to filtering on input 800 ka nl_04=1.0e20 5.4 T next shot: no RF next shot 012 plasma no RF 800 ka nl_04=1.0e20 5.4 T next shot: RF next shot first J4 then J3 ramping to 1.2 MW BT=5.2 T @ 1 MA nl_04=1.0e20 013 plasma BT=5.2 T @ 1 MA nl_04=1.0e20 next shot: ramp J3 and J4 from 0.2 to 1.0 MW 014 plasma early disruption (~1.3 sec) phase appears to be [0,1,1,0]*pi next shot: ramp J3 and J4 from 0.2 to 1.0 MW change relative phase by ~0.85 pi 015 plasma early disruption (~1.2 sec) phase appears to be [0,1,1,0]*pi next shot: ramp J3 and J4 from 0.2 to 1.0 MW change relative phase by ~0.15 pi 016 phase appears to be [0,1,-0.1,0.9]*pi overload FPA screen on 3, 2 trips on 4 1 trip on 3 next shot: ramp J3 and J4 from 0.2 to 1.0 MW change relative phase by ~ pi/2 017 phase appears to be [0,1,0.5,-0.5]*pi 7 trips on 4, mosty late 4 trip on 3 next shot: ramp J3 and J4 from 0.2 to 1.0 MW change relative phase to 195 deg 018 phase appears to be [0,1,0.05,-0.95]*pi as close to 0,pi,0,pi as we could make it, much cleaner pulse. next shot: ramp J3 and J4 from 0.2 to 1.0 MW change gap to 0.5 cm 019 phase appears to be [0,1,0.05,-0.95]*pi as close to 0,pi,0,pi as we could make it, smaller gap at 0.5 cm, slightly better loading, Prad very similar next shot: ramp J3 and J4 from 0.2 to 1.0 MW change gap to 1.5 cm 020 phase appears to be [0,1,0.05,-0.95]*pi as close to 0,pi,0,pi as we could make it, larger gap at 1..5 cm, loading similar, especially in H mode less radiation, longer H-mode next shot: ramp J3 and J4 from 0.2 to 1.0 MW change gap to 2.0 cm (or as close as the P.O. can make it) 021 phase appears to be [0,1,0.05,-0.95]*pi as close to 0,pi,0,pi as we could make it, larger gap at 2.0 cm, loading dropping a little bit no trips |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:37:10:707PM |
| Author: To Be Determined |
| Physop run summary, 1000510 MP268 ICRF conditioning (a last minute swap) SL: Wukitch PO: Marmar EO: Dekow Overnight ECDC in D2 The run went well from the machine point of view. There were no engineering problems. Startup was reliable, with 1 fizzle out of 21 attempts. Various plasma conditions were explored for the RF; only J-port was operational today. The main scans were toroidal field (5.0 to 5.6 T), RF phasing, and outer gap (0.5 to 2.0 cm). Shots 11 and 12 were 0.8 MA; all others were programmed for 1 MA. The earlier shots had problems with the pulsed gas turning off at segment switch, leading to a density drop around .4 seconds, with concomitant increases in radiated power. This was solved starting with shot 15, by increasing the nl_04 programmed density between 0.1 and 0.5 seconds. From the first shot of the day, the plasmas were forced to divert earlier than had been the case up to now in the 2000 campaign. This was accomplished by increasing CLEARIN and RCUR earlier in time, and the plasmas were diverted from 0.25 seconds on. Many plasmas disrupted; most disruptions correlate with RF power >1.2 MW and phasing not equal to 0,pi,0,pi. On many of these shots, the wide angle camera shows a bright spot appearing on the upper edge of the antenna, on the side closest to H port. At the same time, the radiated power increases dramatically, approaching 5 MW before the current turns over. Shot 8 disrupted very early, around 0.2 seconds; this disruption was also preceded by a strong increase in radiated power, which was obviously not RF related. Scorecard: 19 plasmas 1 very early disruption 1 fizzle ____ 21 cycles |
| Session Leader Comments | |||
| May 10 2000 10:40:36:920AM | Steve Wukitch | Objectives: ---------- 1. Characterize J-port antenna under various conditions. 2. Operate D and E-port antennas with SF6 in PS/ST 3. Investigate D, E and J antenna operations with various edge densities Run Plan: --------- 1. BT scan 4.8, 5.0, 5.2, 5.4, 5.6 T @ 1 MA 2. phase scan between J3 and J4 3. Ip scan 0.8, 1.0, 1.2 MA 4. outer gap scan [1.5,1.0,0.5] cm | |
| May 10 2000 09:45:14:653AM | 1000510001 | Steve Wukitch | 001 plasma late H-mode J3: ramp to 0.4 MW and step to 0.8 MW J4: ramp to 0.4 MW and step to 0.8 MW, faults with H-mode right gap is 1.1-1.2 cm nl~1x20 m^2 next shot: repeat with right gap of 1.0 cm |
| May 10 2000 09:58:56:827AM | 1000510002 | Steve Wukitch | 002 fizzle next shot: repeat 001 with right gap of 1.0 cm J3: ramp to 0.4 MW, step to .55 MW and step to 0.8 MW J4: ramp to 0.4 MW, step to .55 MW and step to 0.8 MW |
| May 10 2000 10:21:48:140AM | 1000510003 | Steve Wukitch | 003 plasma with H-modes BT=5.2 T @1 MA nl=1.x10^20 next shot: BT to 5.0 T J3: ramp to 0.4 MW, step to .55 MW, step to 0.8 MW and step to 1 MW J4: ramp to 0.4 MW, step to .55 MW, step to 0.8 MW and step to 1 MW |
| May 10 2000 10:34:01:860AM | 1000510004 | Steve Wukitch | 004 plasma early disruption ~1.01 sec BT=5.0 T @1 MA nl=1.x10^20 next shot: repeat J3: ramp to 0.4 MW, step to .55 MW, step to 0.8 MW and step to 1 MW J4: ramp to 0.4 MW, step to .55 MW, step to 0.8 MW and step to 1 MW J3 integrator time constant to 15 msec from 5 msec |
| May 10 2000 12:44:39:890PM | 1000510008 | Steve Wukitch | 008 early disruption (0.19 sec) |
| May 10 2000 01:03:31:280PM | 1000510009 | Steve Wukitch | 009 plasma - early disruption (~0.9) next shot: repeat RF with larger outer gap (1.2 cm) |
| May 10 2000 01:25:15:233PM | 1000510010 | Steve Wukitch | 010 plasma - early disruption (~0.9) next shot: change BT to 5.4 T nl=1.0x10^20 cm^2 Ip= 0.8 MA |
| May 10 2000 02:00:52:200PM | 1000510011 | Steve Wukitch | 011 plasma - early disruption (~0.68 sec) J3 gave more power than programmed due to filtering on input 800 ka nl_04=1.0e20 5.4 T next shot: no RF next shot |
| May 10 2000 02:02:28:450PM | 1000510012 | Steve Wukitch | 012 plasma no RF 800 ka nl_04=1.0e20 5.4 T next shot: RF next shot first J4 then J3 ramping to 1.2 MW BT=5.2 T @ 1 MA nl_04=1.0e20 |
| May 10 2000 02:36:29:857PM | 1000510013 | Steve Wukitch | 013 plasma BT=5.2 T @ 1 MA nl_04=1.0e20 next shot: ramp J3 and J4 from 0.2 to 1.0 MW |
| May 10 2000 02:48:14:657PM | 1000510014 | Steve Wukitch | 014 plasma early disruption (~1.3 sec) phase appears to be [0,1,1,0]*pi next shot: ramp J3 and J4 from 0.2 to 1.0 MW change relative phase by ~0.85 pi |
| May 10 2000 02:54:00:590PM | 1000510015 | Steve Wukitch | 015 plasma early disruption (~1.2 sec) phase appears to be [0,1,1,0]*pi next shot: ramp J3 and J4 from 0.2 to 1.0 MW change relative phase by ~0.15 pi |
| May 10 2000 03:15:59:733PM | 1000510016 | Steve Wukitch | 016 phase appears to be [0,1,-0.1,0.9]*pi next shot: ramp J3 and J4 from 0.2 to 1.0 MW change relative phase by ~ pi/2 |
| May 10 2000 03:41:50:810PM | 1000510017 | Steve Wukitch | 017 phase appears to be [0,1,0.5,-0.5]*pi 7 trips on 4, mosty late 4 trip on 3 next shot: ramp J3 and J4 from 0.2 to 1.0 MW change relative phase to 195 deg |
| May 10 2000 03:58:42:640PM | 1000510018 | Steve Wukitch | 018 phase appears to be [0,1,0.05,-0.95]*pi as close to 0,pi,0,pi as we could make it, much cleaner pulse. next shot: ramp J3 and J4 from 0.2 to 1.0 MW change gap to 0.5 cm |
| May 10 2000 04:16:47:640PM | 1000510019 | Steve Wukitch | 019 phase appears to be [0,1,0.05,-0.95]*pi as close to 0,pi,0,pi as we could make it, smaller gap at 0.5 cm, slightly better loading, Prad very similar next shot: ramp J3 and J4 from 0.2 to 1.0 MW change gap to 1.5 cm |
| May 10 2000 04:39:30:153PM | 1000510020 | Steve Wukitch | 020 phase appears to be [0,1,0.05,-0.95]*pi as close to 0,pi,0,pi as we could make it, larger gap at 1..5 cm, loading similar, especially in H mode less radiation, longer H-mode next shot: ramp J3 and J4 from 0.2 to 1.0 MW change gap to 2.0 cm (or as close as the P.O. can make it) |
| May 10 2000 04:55:35:250PM | 1000510021 | Steve Wukitch | 021 phase appears to be [0,1,0.05,-0.95]*pi as close to 0,pi,0,pi as we could make it, larger gap at 2.0 cm, loading dropping a little bit no trips |
| Physics Operator Comments | |||
| May 10 2000 09:00:07:950AM | Earl Marmar | We are swapping today's run with tomorrow's, so it will be MP268 ICRF conditioning Start with J-port, scanning B-field Coldstart; all matrices respond, no errors | |
| May 10 2000 09:17:40:793AM | 1000510001 | Earl Marmar | load from 1000509016 change Toroidal field current to 144.4 kA (both segments) tweak RCUR and CLEARIN to get off the inner wall sooner decrease flattop RCUR by 2 mm to increase outer gap (aiming for 10 mm) plasma H-mode with J-port pulls off inner wall at about 0.25 seconds |
| May 10 2000 09:51:27:293AM | 1000510002 | Earl Marmar | Move RCUR out 1 mm (decrease outer gap) fizzle B_R looks a little too negative |
| May 10 2000 10:24:32:793AM | 1000510003 | Earl Marmar | B_R offset from -.001 to -.0005 plasma |
| May 10 2000 10:34:15:857AM | 1000510004 | Earl Marmar | Toroidal field current to 139.1 (segment 2 only) increase argon puff from 50 to 70 ms plasma disrupt at 1.02 seconds; a lot of radiated power |
| May 10 2000 10:52:16:327AM | 1000510005 | Earl Marmar | reduce argon puff from 70 ms to 60 ms plasma disrupt at 0.925 seconds |
| May 10 2000 11:11:13:030AM | 1000510006 | Earl Marmar | 5.4 Tesla (150 kA, both segments) plasma good shot |
| May 10 2000 11:35:27:153AM | 1000510007 | Earl Marmar | 5.6 Tesla (156.4 kA, segment 2 only) plasma |
| May 10 2000 12:40:56:890PM | 1000510008 | Earl Marmar | 5.2 Tesla (144.7 kA, segment 2 only) nl_04 to 1.2 from 1.0 plasma, very early disrupt big increase in radiated power starting at 0.19 s |
| May 10 2000 01:00:28:170PM | 1000510009 | Earl Marmar | retry; slight decrease in nl_04 program between 0.2 and 0.4 seconds plasma; disrupt 0.92 |
| May 10 2000 01:22:25:810PM | 1000510010 | Earl Marmar | disable argon increase outer gap 2 mm plasma disrupt at .92; big radiated power increase just prior |
| May 10 2000 01:50:43:967PM | 1000510011 | Earl Marmar | 800 ka nl_04=1.0e20 5.4 Tesla more RF power disrupts earlier |
| May 10 2000 01:51:01:140PM | 1000510012 | Earl Marmar | repeat with no RF plasma no disruption |
| May 10 2000 02:13:48:327PM | 1000510013 | Earl Marmar | 1 MA 1e20 1.2 cm outer gap plasma Transmitters 3 and 4 run separately |
| May 10 2000 02:31:07:280PM | 1000510014 | Earl Marmar | no PCS changes plasma disrupt at 1.28 seconds |
| May 10 2000 03:13:39:107PM | 1000510015 | Earl Marmar | raise nl_04 program at 0.2 s to 6e19 plasma disrupt at 1.2 |
| May 10 2000 03:13:54:793PM | 1000510016 | Earl Marmar | no PCS changes plasma |
| May 10 2000 03:55:04:657PM | 1000510017 | Earl Marmar | no PCS changes plasma |
| May 10 2000 03:55:18:983PM | 1000510018 | Earl Marmar | no PCS changes plasma |
| May 10 2000 04:16:03:997PM | 1000510019 | Earl Marmar | RCUR out by 3 mm (reduce outer gap to ~5 mm) plasma got the outer gap at 5 mm |
| May 10 2000 04:42:01:747PM | 1000510020 | Earl Marmar | RCUR in by 5 mm (outer gap ~15 mm) Plasma Outer gap varies from 1.5 to 1.2 |
| May 10 2000 05:23:40:810PM | 1000510021 | Earl Marmar | RCUR in by 2 mm CLEARIN out by 1 mm Plasma outer gap ~18 mm |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:06:51:623AM | Plasma | Ok | |
| 2 | 09:44:57:077AM | Plasma | Ok | |
| 3 | 10:04:31:403AM | Plasma | Ok | |
| 4 | 10:24:23:373AM | Plasma | Ok | |
| 5 | 10:45:40:340AM | Plasma | Ok | |
| 6 | 11:02:53:310AM | Plasma | Ok | |
| 7 | 11:24:48:623AM | Plasma | Ok | |
| 8 | 12:23:29:670PM | Plasma | Ok | |
| 9 | 12:43:22:780PM | Plasma | Ok | |
| 10 | 01:03:05:670PM | Plasma | Ok | |
| 11 | 01:24:31:280PM | Plasma | Ok | |
| 12 | 01:40:49:860PM | Plasma | Ok | |
| 13 | 02:04:03:733PM | Plasma | Ok | |
| 14 | 02:23:35:607PM | Plasma | Ok | |
| 15 | 02:43:58:920PM | Plasma | Ok | |
| 16 | 03:04:13:107PM | Plasma | Ok | |
| 17 | 03:29:00:280PM | Plasma | Ok | |
| 18 | 03:49:25:170PM | Plasma | Ok | |
| 19 | 04:09:35:497PM | Plasma | Ok | |
| 20 | 04:26:54:467PM | Plasma | Ok | |
| 21 | 04:47:57:750PM | Plasma | Ok | |