| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Brian Labombard |
| Physics operator(s): | John Goetz |
| Engineering operator(s): | Vinny Bertolino,Frank Silva,Joe Daigle |
| Engineering Operator Run Comment |
| labombard/goetz |
| Session Leader Plans |
| Physics Operators Plans |
| Session Leader Summaries |
| Entered: Jul 7 2004 03:49:13:117PM |
| Author: To Be Determined |
| Session Leader's summary of run 950405 MP# 107 Scrape_off Layer Characterization with reversed Bt and Ip Physics Operator: Goetz Session Leader: LaBombard Engineering Operator: Bertolino/Silva/Daigle The goal of this run was to study the scaling of scrape-off layer conditions in single null diverted plasmas with plasma currents 0.6, 0.8, and 1.0 MA and with reversed Bt and Ip for a range of densities. The plan was to start tuning up on 0.8 MA plasmas with the FSP controller setting the target for the fast-scanning probe. A density ramp would be used to get three different density data points on a single discharge (3 probe scans). At first, we had trouble getting any plasmas at all (see phys_op summary for details). On shot 11 we begin firing the scanning probe, although the plasma had an x-point position close to the inner nose. Also the LCFS position at the scanning probe location was moving in time. This problem was traced to using the combination of strike-point control with FSP control and ZXL control. It was realized that this combination offers a poor control of RXL and apparently allows the x-pt to graze the inner divertor nose. It was less clear why the FSP control could not keep the target steady. Perhaps the set point position was too far away from the reference point (1cm in real space). Instead, we changed to RXL control and FSP control (no strike-point control). This combination allowed us to keep the RXL position centered in the divertor throat while allowing the FSP controller to determine the vertical location of the x-point. By shot 20 we had the plasma we wanted with good FSP target, good inner divertor, good gaps and SSEP. From this shot on the data flowed quickly. We managed to get the 0.8 MA density scan completed by shot 26. From shot 26 on trace amounts of CH4 were injected through the NINJA capillaries on the inner midplane and outer divertor shelf. Clear C-II and C-III plumes were seen directed towards the inner divertor. We now can say that the flow is always directed towards the divertor at this location for x-point up/down and BxgradB up or down (x-point up and BxgradB up is the only case not done). We began to investigate 1MA plasmas from shot 27 on. We were plagued with the usual cycle of disruption-fizzle. (Why does this occur at 1 MA?) We were able to get only two density ramp shots with probe data. Both these shots had a number of moly injections. The electron temperature on one probe scan was noticably different due to a huge moly injection. I think we need to repeat the 1 MA data set. We did not take any data at 0.6 MA. Similar to then run of 950404, the conditions in the inner and outer divertor legs appear to have reversed. The outer divertor is now colder (Te around 5 eV) while the inner divertor is hot (Te around 25 eV). On shot 950405027, a time-evolving partial detachment (as density increase) could be observed on the inner divertor which is remarkably similar to that observed previously on the outer divertor: as Te drops below 5 eV the electron pressure at that probe falls - indicating pressure loss and detachment. The puzzle now becomes: "how does the asymmetry in inner/outer divertor leg connect to the BxgradB direction or the Ip direction?" Does toroidal rotation in the direction of the plasma current explain the observations? The parallel flow direction in the SOL deduced by the scanning probe may shed some light on this. Core rotation from HIREX Jr. could also help. Another interesting question is: "Is there any connection to the H-mode threshold here?" These investigations await further data analysis. See the phys_op_summary for a complete shot-by-shot commentary. Also entries were made in the logbook under the physics operator and session leader topics. |
| Physics Operator Summaries |
| Entered: Jul 7 2004 04:36:53:753PM |
| Author: To Be Determined |
| Physics operator summary for 950405 EO: Bertolino/Silva/Daigle PO: Goetz SL: LaBombard Run 950405 was in support of Mini-Proposal 107 -- SOL Characterization with Reversed Field. The goal of this MP is to systematically explore the behavior of vertical target SN divertor plasmas with gradB x B away from the x-point. Setup: Load 950404029 (increase OH1 current limit) Load segment 2 from 950329015 and: copy EF2_BY_EF4 into wire 13 of segment 2 flip S_IP and S_ICEF4 in segment 2 flip all power supply voltages in segment 2 recalculate RCUR estimator and put in 1000. offset recalculate all magnetics estimators S_IP = +850000 Coldstart hybrid - all matrices respond P_0 = 2.4e-5 Run Plan: Try to achieve successful startup with low field ramping to 5.3T during shot Tune up an acceptable 0.8MA plasma with NL_04 ramp 0.5 -> 0.9e20 When o.k., fire FSP Repeat for NL_04 ramp 0.8 -> 1.5e20 Repeat for NL_04 ramp 1.3 -> 2.5e20 Change plasma current to 0.6 and 1.0MA and repeat This program was not completely carried out. Difficulties in the beginning of the run trying to get a reliable breakdown and the difficulties in obtaining a satisfactory target lowered the number of useful shots. See the Session Leader's summary to find out the details of the physics aspects of the run. Some thoughts from today: -It took a while to figure out how to obtain a reliable stratup with ramping toroidal field. Br tweaks and V_OH1 tweaks seem to have been red herrings and a change in the drawn OH1 current before commutation seems to have done the trick. This change was 100A and was done in order to match the value of OH1 current from 950404. The fizzle detector had to be delayed (with software) on the TF supply in order to accomodate this TF ramp startup. Trying to invert the TF when the supply is still on high-taps turns out to be a bad idea. -The startup seemed to be robust once the correct OH1 current was obtained. There is a hesitation in the current rise between 0.1 and 0.2sec. This is when the current is on voltage programming and plasma current control is still turning on. Late in the run, after 1MA disruptions and CH4 puffing, fizzles began to reappear. For whatever reason, the breakdown moved later (the null appears later). -The supplies were run near voltage and current limits all day. The densities being run were not all that high so why was the flux swing being used so quickly. -The whole run was plagued by moly injections; some large; many small. Many new explosions and glowing spots were observed on the A_SIDE fish-eye camera. Raising the density alleviated the big injections somewhat, but did not keep the machine from being bombarded by moly dust. -Problems with the combination of STRKPSI and FSP controllers occured today. Once reliable plasmas were obtained, these plasmas were not acceptable for the FSP. By changing control to FSP and RXL, good targets were obtained. This in effect makes the plasma edge move up and down to satisfy the FSP constraints (instead of being able to move in and out and cause the x-point to rub on the inner nose). -Fifty kiloamps was added as an offset to the Ip estimator to actually get the drawn value. Engineering, computing, and diagnostics today: Six blown fuses in the TF cabinets in response to the forced inversion of the TF supply while still on the high taps. Problem solved by building a software delay into the TF fizzle detector (only the TF). This causes extra heating of the TF magnet on fizzles and early disruptions but the effect on rep rate was not noticable. Scorecard: 33 shots = 23 plasmas + 10 fizzles Shot summary for Run 950405 coldstart hybrid - all matrices respond 2 hours of D2 ECDC prior to the run See above setup for starting information P_0 = 2.4e-5 Shot change result ____ _____ ______ 1 see above fizzle - b.d. @ .006 moving in - Bz coming in too quickly; TF fuse problem 2 V_OH1 = 35V @ .005; -40V @ .015 fizzle - b.d. @ .008 Bz comes in later but is wrong at t=0 3 V_OH1 = 50V @ .005; P_0 = 2.1e-5 fizzle - b.d. @ .005; RCUR says it is moving inside 4 BR_0 offset = 0.0e-3 plasma - disr. @ 0.57 EF2's on rail; high kappa; o.gap = 3 5 RCUR=.655; copy correct IC_EF4 into fizzle - b.d. @ .007; bounces wire 15, segment 2 @ .016; radial field 6 BR_0 offset = 1.5e-3; V_OH1 = -75V fizzle - b.d. @ .006; bounces from .01 to .02sec; P_0 = 2.0e-5 at .015 & .017; no current rise 7 V_OH1 = -100V @ .015 fizzle - b.d. @ .007 Br 1mT too pos.; OH1 current 100A more pos. that 950404 8 IC_OH1=16000A; BR_0 offset = 0.5e-3 plasma - disr. @ 0.52 EF2's on the rail 9 S_IP=800000 and +50000 offset plasma - disr. @ 0.22 current rolls over @ 0.1sec 10 NL_04=0.5e20 @ 0.2; more P gain on Ip plasma - disr. @ 1.34 after 0.2 bad things @ 0.2 & 0.54 11 stairstep on FSP gains plasma - disr. @ 1.27 12 NL_04 ramp starts @ 0.65; RCUR=0.656; plasma - disr. @ 1.16 CLEARIN=+5e-3 o.gap=2.6; i.gap=1.2 13 RXL=0.; RCUR=0.659; CLEARIN=+6e-3 plasma - disr. @ 0.75 lots of Mo from divertor 14 RCUR = 0.661; FSP = -0.015 plasma - disr. @ 1.18 bad target; i. gap decreases 15 STRKPSI ref = (.622,-.524); CLEARIN plasma - disr. @ 1.09 ramp to 9e-3 @ 1.0 bad target 16 CLEARIN=1.1e-2 @ 1.0sec; FSP=-.0125 plasma - disr. @ 1.12 target o.k. until 0.8 17 ramp FSP to -.01 @ 1; ZXU = +.035 plasma - disr. @ .39 trouble begins @ .23 18 STRKPSI gain off; RXL gain to 1.5; plasma - disr. @ 1.10 ZXL gain lowered to 1 @ 0.55 Mo injection @ 0.82; lose RXL and ZXL after 0.7 19 RXL gain to 4. plasma - disr. @ 1.1 better target; 3 Mo injections 20 no changes plasma - disr. @ 1.32 target acceptable 21 V_OH1=-220V @ .15; up NL_04 early plasma - disr. @ 1.35 acceptable FSP data 22 NL_04=0.8->1.5e20 plasma - all the way down acceptable FSP data 23 NL_04=1.0->1.7e20 plasma - disr. @ 1.49 shark fin; acceptable target 24 NL_04=1.3->2.320 plasma - disr. @ 1.04 EF1L on voltage rail; fighting to hold ZXL 25 NL_04=1.0->1.7e20 fizzle - b.d. @ .01; no bounce 26 no changes plasma - disr. @ 1.34 trapped MARFE until 0.44 27 draw IP to 1e6 plasma - disr. @ 1.03 trapped MARFE until 0.40 28 slow down NL_04 initial ramp fizzle - b.d. @ .01; no bounce 29 no changes fizzle - b.d. @ .005 hards dump @ .04; Ip=.06MA 30 P_0 = 2.4e-5 plasma - disr. @ 1.04 3 Mo inj.; acceptable target 31 NL_04 = 0.7->1.2e20 plasma - disr. @ 1.04 lots of supplied on volt. rail 32 NL_04 = 1.2->2.1e20 fizzle - b.d. @ .009 CII light 2.5x normal 33 no changes plasma - disr. @ 0.6; Mo problems from 0.3 on |
| Session Leader Comments | |||
| Apr 5 1995 11:52:13:750AM | 950405011 | Brian Labombard | Shot 11
Setup: FSP firing at .65, .8, and .95 sec. Rest postion is 10 mm. Result: Good plasma. 0.8 MA, samples densities 0.62, .68, 0.8 e20 2, 0 ,1 mm inside LCFS. Right gap is 2.7 cm, left gap is 1 cm. |
| Apr 5 1995 12:13:16:150PM | 950405012 | Brian Labombard | Shot 12
Setup: FSP firing at .65, .8, and .95 sec. Rest postion is 5 mm. Result: Samples: .46, .6,.73e20. 2, 2, 2, mm outside LCFS. Right gap is still 2.7 cm. |
| Apr 5 1995 12:25:50:100PM | 950405013 | Brian Labombard | Shot 13
Setup: FSP firing at .65, .8, and .95 sec. Rest postion is 5 mm. Result: Samples: .48e20 , 5 mm outside. |
| Apr 5 1995 12:44:06:150PM | 950405014 | Brian Labombard | Shot 14
Setup: FSP firing at .65, .8, and .95 sec. Rest postion is 0 mm. Result: Samples .49, 7.0 , 8.3e20, 5, 2, 0 mm outside LCFS. |
| Apr 5 1995 12:59:46:790PM | 950405015 | Brian Labombard | Shot 15
Setup: FSP firing at .65, .8, and .95 sec. Rest postion is 0 mm. Result: Samples .45, .64, .77e20 4, 2, 0 mm outside LCFS. |
| Apr 5 1995 01:20:51:030PM | 950405016 | Brian Labombard | Shot 16
Setup: FSP firing at .65, .8, and .95 sec. Rest postion is 0 mm. Result: Samples .51, .67, .79e20, 9, 8, 4, mm outside LCFS. |
| Apr 5 1995 01:26:08:140PM | 950405017 | Brian Labombard | Shot 17
Setup: FSP firing at .65, .8, and .95 sec. Rest postion is 0 mm. Result: Disrupted at .395. |
| Apr 5 1995 02:02:41:320PM | 950405018 | Brian Labombard | Shot 18
Setup: FSP not firing. Result: |
| Apr 5 1995 02:19:11:880PM | 950405019 | Brian Labombard | Shot 18
Setup: FSP not firing. Result: |
| Apr 5 1995 02:31:24:730PM | 950405020 | Brian Labombard | Shot 20
Setup: FSP at .65, .8, .95 sec rest position 4 mm. Result: 3,3,3 mm outside LCFS. This plasma is finally OK for the miniproposal. Samples: 0.5, 0.65, 0.77e20 |
| Apr 5 1995 02:44:15:730PM | 950405021 | Brian Labombard | Shot 21
Setup: FSP at .65, .8, .95 sec rest position 7 mm. Result: Samples: .45, .63, .8e20, All three scans to LCFS. Next shot change to medium density ramp. |
| Apr 5 1995 02:55:26:850PM | 950405022 | Brian Labombard | Shot 22
Setup: FSP at .65, .8, .95 sec rest position 8 mm. Result: Samples: .76, 1.0, 1.2e20. All three scans make it to LCFS. |
| Apr 5 1995 03:09:36:300PM | 950405023 | Brian Labombard | Shot 23
Setup: FSP at .65, .8, .95 sec rest position 8 mm. Result: Samples .94, 1.2, 1.4e20. All three scans go to LCFS. Higher density on the next shot. |
| Apr 5 1995 03:10:54:830PM | 950405023 | Brian Labombard | Shot 23
Setup: FSP at .65, .8, .95 sec rest position 8 mm. Result: Samples .94, 1.2, 1.4e20. All three scans go to LCFS. Higher density on the next shot. |
| Apr 5 1995 03:20:38:570PM | 950405024 | Brian Labombard | Shot 24
Setup: FSP at .65, .8, .95 sec rest position 8 mm. Result: Samples 1.3, 1.58, 1.87e20. 0, 0, 2 mm outside LCFS. go down to lower density ramp on next shot. |
| Apr 5 1995 03:33:12:280PM | 950405025 | Brian Labombard | Shot 25
Setup: FSP at .65, .8, .95 sec rest position 8 mm. CH4 injection (trace) from B16-001 (inner wall) and B31-086 Looking At C-II from B-Side camera and C-II from B-top camera. Result: Fizzle.. |
| Apr 5 1995 03:53:25:970PM | 950405026 | Brian Labombard | Shot 26
Setup: FSP firing during. Rest position 8 mm. CH4 injection (trace) from B16-001 (inner wall) and B31-086 Looking At C-II from B-Side camera and C-II from B-top camera. Result: Nice plume from inner wall capillary, flowing towards inner divertor. Densites: .98, 1.2, 1.4e20. |
| Apr 5 1995 04:00:43:430PM | 950405027 | Brian Labombard | Shot 27
Setup: 1MA. FSP not firing. Rest position 0 mm. CH4 injection (trace) from B16-001 (inner wall) and B31-086 Looking At C-II from B-Side camera and C-II from B-top camera. Result: Very nice plasma. Repeat with FSP. |
| Apr 5 1995 04:03:28:960PM | 950405028 | Brian Labombard | Shot 28
Setup: 1MA. FSP firing at .65, .8, .95 sec.. Rest position 7 mm. CH4 injection (trace) from B16-001 (inner wall) and B31-086 Looking At C-III from B-Side camera and C-III from B-top camera. Result: FIzzle. |
| Apr 5 1995 04:16:09:820PM | 950405029 | Brian Labombard | Shot 29
Setup: 1MA. FSP firing at .65, .8, .95 sec.. Rest position 7 mm. CH4 injection (trace) from B16-001 (inner wall) and B31-086 Looking At C-III from B-Side camera and C-III from B-top camera. Result: Fizzle. |
| Apr 5 1995 04:32:22:560PM | 950405030 | Brian Labombard | Shot 30
Setup: 1MA. FSP firing at .65, .8, .95 sec.. Rest position 7 mm. CH4 injection (trace) from B16-001 (inner wall) and B31-086 Looking At C-III from B-Side camera and C-III from B-top camera. Result: Big moly injection just before first scan - perturbs floating potential. FSP samples: .99, 1.2, 1.4e20 Change to lower density ramp on next shot. |
| Apr 5 1995 04:51:10:390PM | 950405031 | Brian Labombard | Shot 31
Setup: 1MA. FSP firing at .65, .8, .95 sec.. Rest position 7 mm. CH4 injection (trace) from B16-001 (inner wall) and B31-086 Looking At C-III from B-Side camera and C-III from B-top camera. Result: Series of moly injections just before first scan - perturbs floating potential. FSP samples: .58, .83, 1.0e20. three scans to LCFS. Change to highest density ramp on next shot. |
| Apr 5 1995 04:55:53:330PM | 950405032 | Brian Labombard | Shot 32
Setup: 1MA. FSP firing at .65, .8, .95 sec.. Rest position 7 mm. CH4 injection (trace) from B16-001 (inner wall) and B31-086 Looking At C-III from B-Side camera and C-III from B-top camera. Result: Fizzle. |
| Apr 5 1995 05:01:56:990PM | 950405033 | Brian Labombard | Shot 33
Setup: 1MA. FSP firing at .65, .8, .95 sec.. Rest position 7 mm. CH4 injection (trace) from B16-001 (inner wall) and B31-086 Looking At C-III from B-Side camera and C-III from B-top camera. Result: Disrupted at .6 sec. |
| Physics Operator Comments | |||
| Apr 5 1995 08:09:42:120AM | John Goetz | Run 950405
In support of Mini-Proposal #107 -- SOL Characterization with Reversed Field Goal of this MP is to systematically explore the behavior of vertical target SN divertor plasmas with gradB x B away from the x-point. Setup: Load 950404029 (increase OH1 current limit) Load segment 2 from 950329015 and: copy EF2_BY_EF4 into wire 13 of segment 2 flip S_IP and S_ICEF4 in segment 2 flip all power supply voltages in segment 2 recalculate RCUR estimator and put in 1000. offset recalculate all magnetics estimators S_IP = +850000 Coldstart hybrid - all matrices respond P_0 = 2.4e-5 | |
| Apr 5 1995 08:12:13:070AM | John Goetz | Run 950405
In support of Mini-Proposal #107 -- SOL Characterization with Reversed Field Goal of this MP is to systematically explore the behavior of vertical target SN divertor plasmas with gradB x B away from the x-point. Run Plan: Try to achieve successful startup with low field ramping to 5.3T during shot Tune up an acceptable 0.8MA plasma with NL_04 ramp 0.5 -> 0.9e20 When o.k., fire FSP Repeat for NL_04 ramp 0.8 -> 1.5e20 Repeat for NL_04 ramp 1.3 -> 2.5e20 | |
| Apr 5 1995 08:59:02:260AM | 950405001 | John Goetz | Shot 950405001:
See NULL entry for setup P_0 = 2.4e-5 Results: fizzle b.d. at .006; hits something at .013 and .016 vertical field coming in too quickly TF pulled out going from rectification to inversion fizzle detector kicks it out while still on high taps some blown fuses |
| Apr 5 1995 09:19:34:740AM | 950405002 | John Goetz | Shot 950405001:
V_OH1 = 35V @ .005 (was 50V) and -40V @ .015 (was -20V) Results: fizzle - b.d. at .008 vertical field comes in much later CII light is low, but no current rise RCUR estimator says it is moving in |
| Apr 5 1995 09:24:25:250AM | 950405003 | John Goetz | Shot 950405003:
V_OH1 = 50V @ .005 P_0 = 2.1e-5 Results: fizzle - b.d. at .005 bounces @ .015 RCUR estimator says it is moving in |
| Apr 5 1995 09:51:47:860AM | 950405004 | John Goetz | Shot 950405004:
BR_0 offset = 0.0 Results: plasma - disrupted @ 0.57 EF2's on rail; forgot to load the IC_EF4 that goes with EF2_BY_EF4 kappa = 1.8; o.gap = 3 |
| Apr 5 1995 10:00:31:220AM | 950405005 | John Goetz | Shot 950405005:
copy correct IC_EF4 into wire 15, segment 2 RCUR = 0.655 to lower elongation Results: fizzle - b.d. @ .007; bounces @ .016 |
| Apr 5 1995 10:14:48:770AM | 950405006 | John Goetz | Shot 950405006:
BR_0 offset = 1.5e-3 V_OH1 = -75V from .01 to .02sec P_0 = 2.0e-5 Results: fizzle - b.d. @ .006 bounces @ .015 & .017; halpha sticks around for a long time, but no current rise |
| Apr 5 1995 10:26:40:800AM | 950405007 | John Goetz | Shot 950405007:
V_OH1 = -100V @ .015 Results: fizzle - b.d. @ .007 scatterplot says Br 1mT too positive OH1 current is 100A more positive than yesterday |
| Apr 5 1995 10:49:57:310AM | 950405008 | John Goetz | Shot 950405008:
IC_OH1 = 16000A before commutation BR_0 offset = +0.5e-3 Results: plasma - disrupts @ .52 EF2 on rail @ .45 big gain step on IP at 0.4sec |
| Apr 5 1995 11:19:00:230AM | 950405009 | John Goetz | Shot 950405009:
S_IP = +800000 and put in +50000 offset Results: plasma - disr. @ .22 current rolls over @ 0.1sec; Vsurf = 4 V_OH1 ~ 400V; can't try much harder |
| Apr 5 1995 11:33:06:120AM | 950405010 | John Goetz | Shot 950405010:
NL_04 = 0.5e20 @ 0.2 more P gain on Ip after 0.2sec Results: plasma - disrupts @ 1.34 good target bad things @ 0.2 and 0.54 sec when controllers turn on |
| Apr 5 1995 11:52:33:160AM | 950405011 | John Goetz | Shot 950405011:
P_IP = 1 @ 0.08sec in segment 2 staristep on FSP gain from 0.45 to 0.55sec Results: plasma - disrupts @ 1.27 still the same thrashing at 0.2 & 0.5 |
| Apr 5 1995 12:07:04:570PM | 950405012 | John Goetz | Shot 950405012:
NL_04 ramp to start @ 0.65 RCUR = 0.656 CLEARIN = +5e-3 Results: plasma - disr. @ 1.16 outer gap still large; inner gap bigger than 011 -> high kappa |
| Apr 5 1995 12:25:50:530PM | 950405013 | John Goetz | Shot 950405013:
RXL = 0. RCUR = 0.659 CLEARIN = +6e-3 Results: plasma - disr. @ 0.75 many Mo injections from the divertor |
| Apr 5 1995 12:43:38:480PM | 950405014 | John Goetz | Shot 950405014:
RCUR = 0.661 FSP = -.015 Results: plasma - disrupts @ 1.18 inner gap shrinking bad target; LCFS moving toward the probe throughout the shot |
| Apr 5 1995 12:59:16:120PM | 950405015 | John Goetz | Shot 950405015:
STRKPSI reference = (.622,-.524) which is probe 3 CLEARIN ramp to 9e-3 @ 1.0 Results: plasma - disrupts @ 1.09 1.5MW of RF probably did this one in FSP target still drifting closer |
| Apr 5 1995 01:17:55:330PM | 950405016 | John Goetz | Shot 950405016:
CLEARIN ramp to 1.1e-2 @ 1.0 FSP = -.0125 Results: plasma - disrupts @ 1.12 target o.k. from 0.6->0.8sec then drifts down |
| Apr 5 1995 01:30:52:060PM | 950405017 | John Goetz | Shot 950405017:
ramp FSP to -.01 @ 1.0 ZXU = +.035 Results: plasma - disrupts @ 0.39 in trouble beginning at 0.23; it is rubbing somewhere EF1's on the voltage rail |
| Apr 5 1995 01:58:39:310PM | 950405018 | John Goetz | Shot 950405018:
change control strategy on target position turn off STRKPSI gain turn RXL gain back on; ZXL gain lowered to 1 Results: plasma - disrupts @ 1.10 Mo injection @ 0.82 lose RXL and ZXL control after 0.7 sec |
| Apr 5 1995 02:20:07:650PM | 950405019 | John Goetz | Shot 950405019:
RXL gain to 4. Results: plasma - disr. @ 1.1 better target 3 big Mo injections |
| Apr 5 1995 02:31:39:900PM | 950405020 | John Goetz | Shot 950405020:
no changes Results: plasma - disrupts @ 1.32 target acceptable good RXL and ZXL control |
| Apr 5 1995 02:43:30:170PM | 950405021 | John Goetz | Shot 950405021:
V_OH1 = -220V @ 0.15sec in segment 2 up NL_04 early Results: plasma - disr. @ 1.35 acceptable FSP data |
| Apr 5 1995 02:56:09:380PM | 950405022 | John Goetz | Shot 950405022:
NL_04 ramp from 0.8->1.5e20 (starting @ 0.65) Results: plasma - all the way down many, many small injections acceptable target - trophy shot for the day so far |
| Apr 5 1995 03:08:27:190PM | 950405023 | John Goetz | Shot 950405023:
NL_04 ramp from 1.0->1.7e20 (starting @ 0.65) Results: plasma - disrupts @ 1.49 (shark fin disruption) density ramp o.k. acceptable target |
| Apr 5 1995 03:21:45:700PM | 950405024 | John Goetz | Shot 950405024:
NL_04 ramp from 1.3->2.3e20 (starting @ 0.65) Results: plasma - disrupts @ 1.04sec EF1L heading toward the voltage rail - fighting valiantly to hold ZXL moly injection @ 0.42 |
| Apr 5 1995 03:39:27:120PM | 950405025 | John Goetz | Shot 950405025:
NL_04 ramp from 1.0->1.7e20 (starting @ 0.65) Results: fizzle - b.d. @ .01sec nothing untoward with the fields; CII up 50% from 024 |
| Apr 5 1995 03:49:29:840PM | 950405026 | John Goetz | Shot 950405026:
no changes Results: plasma - disr. @ 1.34 trapped MARFE until 0.44 acceptable target |
| Apr 5 1995 04:00:49:190PM | 950405027 | John Goetz | Shot 950405027:
IP drawn to 1e6 Results: plasma - disr. @ 1.03 RF ~ 1.2MW acceptable target |
| Apr 5 1995 04:11:11:260PM | 950405028 | John Goetz | Shot 950405028:
no changes Results: fizzle - b.d. @ .01 - no bounce CII light 2x the level of 027 |
| Apr 5 1995 04:20:35:160PM | 950405029 | John Goetz | Shot 950405029:
no changes Results: fizzle - b.d. @ .005 hards dump @ .04sec reached .06MA |
| Apr 5 1995 04:31:27:570PM | 950405030 | John Goetz | Shot 950405030:
P_0 = 2.4e-5 Results: plasma - disr. @ 1.04 RF ~ 1.1MW 3 somewhat large Mo injections acceptable target and FSP data |
| Apr 5 1995 04:48:53:240PM | 950405031 | John Goetz | Shot 950405031:
NL_04 = 0.7->1.2e20 Results: plasma - disr. @ 1.04 lots of supplies on their voltage rails near end of shot very acceptable FSP target |
| Apr 5 1995 05:05:42:280PM | 950405032 | John Goetz | Shot 950405032:
NL_04 = 1.2->2.1e20 Results: fizzle - b.d. @ .009 CII light 2.5X normal null comes in late |
| Apr 5 1995 05:08:50:870PM | 950405033 | John Goetz | Shot 950405033:
no changes Results: plasma - disrupts @ 0.60 Ihalo > 150kA Mo problems on this one from 0.3 sec MARFE fueled for a while EF2's on the current rail for a long time |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 08:25:40:260AM | Plasma | Ok | tf ioc in inversion |
| 2 | 09:05:28:450AM | Plasma | Ok | no faults |
| 3 | 09:17:37:890AM | Plasma | Ok | no faults |
| 4 | 09:37:31:500AM | Plasma | Ok | no faults |
| 5 | 09:51:58:620AM | Plasma | Ok | no faults |
| 6 | 10:03:37:010AM | Plasma | Ok | no faults |
| 7 | 10:17:21:150AM | Plasma | Ok | no faults |
| 8 | 10:27:24:810AM | Plasma | Ok | no faults |
| 9 | 10:49:27:970AM | Plasma | Ok | no faults |
| 10 | 11:16:34:870AM | Plasma | Ok | no faults |
| 11 | 11:32:59:430AM | Plasma | Ok | no faults |
| 12 | 11:53:35:580AM | Plasma | Ok | no faults |
| 13 | 12:08:32:250PM | Plasma | Ok | no faults |
| 14 | 12:26:34:470PM | Plasma | Ok | no faults |
| 15 | 12:44:51:090PM | Plasma | Ok | no faults |
| 16 | 12:59:22:600PM | Plasma | Ok | No faults. |
| 17 | 01:17:19:480PM | Plasma | Ok | no faults |
| 18 | 01:34:42:870PM | Plasma | Ok | No Faults. |
| 19 | 01:59:31:100PM | Plasma | Ok | No faults. |
| 20 | 02:19:18:560PM | Plasma | Ok | No Fault. |
| 21 | 02:31:57:880PM | Plasma | Ok | No Faults. |
| 22 | 02:45:33:010PM | Plasma | Ok | No faults. |
| 23 | 02:58:05:180PM | Plasma | Ok | No Faults. |
| 24 | 03:10:22:690PM | Plasma | Ok | Comm Fault OH2l & OH1 |
| 25 | 03:28:19:110PM | Plasma | Ok | No Faults. |
| 26 | 03:39:40:770PM | Plasma | Ok | No Faults. |
| 27 | 03:50:55:740PM | Plasma | Ok | Comm Fault OH1 & OH2L |
| 28 | 04:02:00:290PM | Plasma | Ok | No Faults. |
| 29 | 04:13:36:920PM | Plasma | Ok | No Faults. |
| 30 | 04:21:42:010PM | Plasma | Ok | No Faults. |
| 31 | 04:40:30:870PM | Plasma | Ok | no faults. |
| 32 | 04:50:26:330PM | Plasma | Ok | No Faults. |
| 33 | 04:58:33:860PM | Plasma | Ok | No Faults. |