| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | Stewart Zweben |
| Physics operator(s): | Earl Marmar |
| Engineering operator(s): | Bill Cochran,Andy Pfeiffer,Gary Dekow |
| Engineering Operator Run Comment |
| Power Tests (Normal field operation)& MP429...Continued. |
| Session Leader Plans |
| Entered: Jul 31 2007 11:08:23:067AM |
| Author: Stewart Zweben |
| MP#429 (...continued)
Session leaders: S. Zweben, J. Terry Physics operator: E. Marmar SOL turbulence w/ limited plasma -- B field scan i.e. another 1/2 day of MP#429 , OHMIC ONLY 8/1/07 *** asking for 5 shot types, 2-3 shots each *** *** NINJA filled with 10 PSI D2 for GPI *** 1) reestablish baseline case @ 5.4 T, 0.8 MA. Use as template #1070504002 from prior run of MP429 . This is an inner wall limited shot at kappa=1.2 with a large outer gap of about 3.5 cm. Do 2-3 shots at medium n. Exercise probes and check out GPI. 2) retry low field case @2.8 T, 0.4 MA. Use as template #1070504010 from prior run of MP429, but either ramp down B faster so as to reach B=2.8 T at 0.8 sec, or delay time of interest until after 2.8 T has been reached (~ 1 sec). These first low field shots should be at lowest possible density. Do 2-3 shots. 3) keep same B, I as step (2), but try to raise the density as much as possible. Do 2-3 shots at this higher density. 4) move to B=4 T, I=0.6 MA, based on the same template as shot type #1 (there is no prior shot at this field for MP429). First attempts should be at the lowest possible density. Do 2-3 shots. 5) after 2-3 good shots of type #4, try to raise density as much as possible at this B, I. Do 2-3 shots at this higher density. 6) if time allows, return to high field case B=6.8 T, I=1.0 MA, using template #1070504008 from prior run of MP429. Do medium density case. |
| Physics Operators Plans |
| Entered: Jul 31 2007 05:59:29:707PM |
| Author: Earl Marmar |
| ECDC overnight in D2, pressure=2e-4 Torr. Rmin/Rdwell/Rmax = 44/45/103 cm.
Bake at 60 C. We have changed the toroidal field and current back to "normal" direction. Power supply tests, under PLC control, will be carried out in the morning, to check the status of all coils and bus connections. Once complete, we will re-establish plasma operation, then move to MP429. Power systems as on 1070503025. A-coil configuration: normal [Dtop -Dbot -Jtop +Jbot] and enabled. Gas Setup: fill B-Top with 6 psi D2 Hybrid enabled (PG4) fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1) leave B-side upper as is Hybrid DISABLED (PG2) fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3) leave NINJA as is DISABLED Enable the following gate valves and shutters: ECE, VUV, Z-bolo shutters Torvac setup: Gate valves open during pulse. Session leaders: S. Zweben, J. Terry Physics operator: E. Marmar SOL turbulence w/ limited plasma -- B field scan i.e. another 1/2 day of MP#429 , OHMIC ONLY 8/1/07 *** asking for 5 shot types, 2-3 shots each *** *** NINJA filled with 10 PSI D2 for GPI *** 1) reestablish baseline case @ 5.4 T, 0.8 MA. Use as template #1070504002 from prior run of MP429 . This is an inner wall limited shot at kappa=1.2 with a large outer gap of about 3.5 cm. Do 2-3 shots at medium n. Exercise probes and check out GPI. 2) retry low field case @2.8 T, 0.4 MA. Use as template #1070504010 from prior run of MP429, but either ramp down B faster so as to reach B=2.8 T at 0.8 sec, or delay time of interest until after 2.8 T has been reached (~ 1 sec). These first low field shots should be at lowest possible density. Do 2-3 shots. 3) keep same B, I as step (2), but try to raise the density as much as possible. Do 2-3 shots at this higher density. 4) move to B=4 T, I=0.6 MA, based on the same template as shot type #1 (there is no prior shot at this field for MP429). First attempts should be at the lowest possible density. Do 2-3 shots. 5) after 2-3 good shots of type #4, try to raise density as much as possible at this B, I. Do 2-3 shots at this higher density. 6) if time allows, return to high field case B=6.8 T, I=1.0 MA, using template #1070504008 from prior run of MP429. Do medium density case. |
| Session Leader Summaries |
| Entered: Aug 1 2007 04:57:10:183PM |
| Author: Stewart Zweben |
| conclusion of MP#429, SOL turbulence with limited plasma - B and n scan
this was a very successful run and we completed all requested shots MP429 was sots #14-35 shot 14: good retry of B=5.4 T, I=0.8 MA case, no probes, no ninja puff shot 15: good repeat of 14, with ninja at 0.9,probes at 0.8, 1.0, and 1.2 sec shot 16: good repeat of 15 - shot 17: good B=2.8 T, I=0.4 MA, ninja puff but no probes, k-bolo puff off shot 18: good repeat of 17, with probes shot 19: good repeat of 18 shot 20: good repeat of 19 with a bit higher density shot 21: good repeat of 20 but even higher density, marfe and late disruption shot 22: fizzle, probably due to disruption shot 23: good repeat of 20, moderate density shot 24: good B=4.0 T, I=0.6 MA, moderate density shot 25: good repeat of 24 with lower density, something fell in at 1.22 s shot 26: good repeat of 25 but higher density shot 27: good repeat of 26 but with still higher density shot 28: good shot at B=6.8 T, I=1.0 MA low density shot 29: good repeat of 28 but try for lower density shot 30: good repeat of 29 but higher density, near density limit shot 31: good repeat of shot 16 at B=5.4 T, for mach probe shot 32: good repeat of shot 16 at B=5.4 T for fluctuation probe shot 33: fizzle - probably due to N2 leak shot 34: good repeat of shot 18 at B=2.8 T, for mach probe shot 35: good repeat of shot 18 at B=2.8 T, for fluctuation probe end of MP429 now do beam into gas |
| Entered: Aug 1 2007 05:10:10:980PM |
| Author: Steve Scott |
| conclusion of MP#429, SOL turbulence with limited plasma - B and n scan
this was a very successful run and we completed all requested shots MP429 was sots #14-35 shot 14: good retry of B=5.4 T, I=0.8 MA case, no probes, no ninja puff shot 15: good repeat of 14, with ninja at 0.9,probes at 0.8, 1.0, and 1.2 sec shot 16: good repeat of 15 - shot 17: good B=2.8 T, I=0.4 MA, ninja puff but no probes, k-bolo puff off shot 18: good repeat of 17, with probes shot 19: good repeat of 18 shot 20: good repeat of 19 with a bit higher density shot 21: good repeat of 20 but even higher density, marfe and late disruption shot 22: fizzle, probably due to disruption shot 23: good repeat of 20, moderate density shot 24: good B=4.0 T, I=0.6 MA, moderate density shot 25: good repeat of 24 with lower density, something fell in at 1.22 s shot 26: good repeat of 25 but higher density shot 27: good repeat of 26 but with still higher density shot 28: good shot at B=6.8 T, I=1.0 MA low density shot 29: good repeat of 28 but try for lower density shot 30: good repeat of 29 but higher density, near density limit shot 31: good repeat of shot 16 at B=5.4 T, for mach probe shot 32: good repeat of shot 16 at B=5.4 T for fluctuation probe shot 33: fizzle - probably due to N2 leak shot 34: good repeat of shot 18 at B=2.8 T, for mach probe shot 35: good repeat of shot 18 at B=2.8 T, for fluctuation probe end of MP429 now do beam into gas to check Doppler shift. beam-into-gas, no fields conditions like yesterday, 1070731003 (sds) shot 36: good. torus pressure a little high. shot 37: good. torus pressure more similar to shot 17 yesterday shot 38: good. very similar to shot 37. end of day |
| Physics Operator Summaries |
| Entered: Aug 1 2007 05:16:37:987PM |
| Author: Earl Marmar |
| The run went well today. Planned as a half run, we got more than 5 good hours of operation.
We returned to "normal" field and current direction for today. Power supply tests were completed by 11:00 am (first 13 cycles). Plasma startup was good, with 20 good shots and 2 fizzles. In the mid-afternoon, mass 28 on the RGA's rose substantially, and may have been partly responsible for the fizzle on shot 33. TF central column cooling was dialed back, and the leak rate steadied, or started to turn over. All conditions for the MP were run, including density, field and current scans, in near-circular inner-wall-limited topology; see the session leader summary for details. The last 3 cycles of the day were DNB into helium-4 gas for MSE tests. Summary: plasmas 20 power supply tests 13 fizzles 2 beam into gas 3 Total Cycles 38 |
| Session Leader Comments | |||
| Aug 1 2007 09:21:46:253AM | Stewart Zweben | start with bringing machine back to normal field operation | |
| Aug 1 2007 11:29:09:260AM | 1070801014 | Stewart Zweben | started with bringing machine back to normal field operation shots 1-13
shot 14 like 1070504002, good shot @ 5.4 T, 0.8 MA no ninja puff and no probes yet |
| Aug 1 2007 11:44:36:807AM | 1070801015 | Stewart Zweben | like 14, good shot @ 5.4 T, 0.8 MA
with ninja puff and probes this time |
| Aug 1 2007 11:57:21:667AM | 1070801016 | Stewart Zweben | like 15, good shot @ 5.4 T, 0.8 MA
with ninja puff and probes this time |
| Aug 1 2007 12:06:01:037PM | 1070801017 | Stewart Zweben | good shot @ 2.8 T, 0.4 MA, like 1070504010
with ninja puff but no probes this time k-bolo puff turned off for this shot |
| Aug 1 2007 12:45:56:740PM | 1070801018 | Stewart Zweben | good shot @ 2.8 T, 0.4 MA, like shot 17
with ninja puff snf probes this time k-bolo puff turned off for this shot |
| Aug 1 2007 12:59:44:113PM | 1070801019 | Stewart Zweben | good shot @ 2.8 T, 0.4 MA, like shot 18
with ninja puff and probes this time k-bolo puff turned off for this shot |
| Aug 1 2007 01:08:09:670PM | 1070801020 | Stewart Zweben | good shot @ 2.8 T, 0.4 MA, like shot 19
but a little higher density programmed with ninja puff and probes this time k-bolo puff turned off for this shot |
| Aug 1 2007 01:26:26:190PM | 1070801021 | Stewart Zweben | good shot @ 2.8 T, 0.4 MA, like shot 20
but a little higher density programmed marfe and disruption at end, density limit with ninja puff and probes this time k-bolo puff turned off for this shot |
| Aug 1 2007 01:34:36:217PM | 1070801022 | Stewart Zweben | fizzle |
| Aug 1 2007 01:51:36:597PM | 1070801023 | Stewart Zweben | like shot 20, moderate density B=2.8 T, I=0.4 MA
with ninja and probes, but Mach configuration |
| Aug 1 2007 02:06:29:630PM | 1070801024 | Stewart Zweben | first shot at B=4 T, I=0.6 MA, good moderate density
with ninja and probes |
| Aug 1 2007 02:17:38:500PM | 1070801025 | Stewart Zweben | another shot at B=4 T, I=0.6 MA, try for lower density
something fell in at 1.22 sec with ninja and probes |
| Aug 1 2007 02:29:53:810PM | 1070801026 | Stewart Zweben | another shot at B=4 T, I=0.6 MA, higher density
with ninja and probes |
| Aug 1 2007 02:55:55:640PM | 1070801027 | Stewart Zweben | last shot at B=4.0 T, I=0.7 MA, near density limit
with ninja and probes, |
| Aug 1 2007 02:55:23:920PM | 1070801028 | Stewart Zweben | first shot at B=6.8 T, I=1.0 MA, try for low density
with ninja and probes, B field a little low |
| Aug 1 2007 03:04:55:163PM | 1070801029 | Stewart Zweben | try for lower density at B=6.8 T, I=1.0 MA
B field close to 6.8 T this time with ninja and probes |
| Aug 1 2007 03:25:27:797PM | 1070801030 | Stewart Zweben | near density limit at B=6.8 T, I=1.0 MA
B field close to 6.8 T this time with ninja and probes |
| Aug 1 2007 03:37:26:187PM | 1070801031 | Stewart Zweben | repeat of shot 16 at B=5.4 T, I=0.8 MA
with ninja and probes |
| Aug 1 2007 03:51:01:140PM | 1070801032 | Stewart Zweben | repeat of shot 16 at B=5.4 T, I=0.8 MA
with ninja and probes, now mach probes |
| Aug 1 2007 04:02:19:277PM | 1070801033 | Stewart Zweben | fizzle |
| Aug 1 2007 04:15:53:653PM | 1070801034 | Stewart Zweben | back to B=2.8 T, I=0.4 MA to get better probe data
ninja and probes OK |
| Aug 1 2007 04:27:33:930PM | 1070801035 | Stewart Zweben | back to B=2.8 T, I=0.4 MA to get better probe data
ninja and probes, very low density OK |
| Aug 1 2007 04:54:26:510PM | 1070801036 | Steve Scott | Desired condition: beam-into-gas, no fields. Just like 1070731003 DNB starts at 0.4 sec Purpose: look for motion of MSE optics by measuring the Doppler shift of light through the MSE channel #9 (near optical axis of MSE). result: good un-modulated beam, identical to yesterday (1070731017). Gas is a little high, about 3.3 on g-side-mks. will ask for 20% reduction next shot. I did not see the dnb striking the inner wall on the video. some question whether the gate valve opened. |
| Aug 1 2007 05:07:05:413PM | 1070801037 | Steve Scott | good dnb. got a torus pressure very similar to 1070731017. |
| Aug 1 2007 05:07:56:070PM | 1070801038 | Steve Scott | Good shot. good dnb, torus pressure like previous shot this concludes our 3-shot check of the Doppler shift. |
| Physics Operator Comments | |||
| Aug 1 2007 09:39:49:030AM | 1070801004 | Earl Marmar | a-coil test
load from 1070313006 segment 1 is the only one that is on a-coil current programmed to go to 1 kA got about 500 amps; engineers say it's ok |
| Aug 1 2007 09:57:03:903AM | 1070801006 | Earl Marmar | getting ready for the physics part of the run
load from 1070713001 (to get the startup) call all magnetics using f19 and apply, all 4 segments segment 1: RCUR offset to 1200, BR_0 offset to -.0035 load segment 2 from 1070504002 (inner-wall limited, circular) call all magnetics using f19, and apply check all 4 segments for illegal use of f19 (f10 and f11 as well), looks ok segments 1 and 2 on, segments 3 and 4 off load Shot 6 is actually intended as an EF4 forward bridge test (PLC control) |
| Aug 1 2007 11:29:36:370AM | 1070801014 | Earl Marmar | first plasma attempt
prefill puff is 20 msec plasma |
| Aug 1 2007 11:40:17:850AM | 1070801015 | Earl Marmar | ZCUR up 1 cm
plasma ninja injecting starting at ~0.9 seconds |
| Aug 1 2007 11:49:42:360AM | 1070801016 | Earl Marmar | no pcs changes
plasma |
| Aug 1 2007 12:05:07:597PM | 1070801017 | Earl Marmar | load segment 2 from 1070504010 (.4 MA, Bt ramps down to 2.8 T)
plasma |
| Aug 1 2007 12:45:30:440PM | 1070801018 | Earl Marmar | enable active MHD (dpcs_ftae2)
ZCUR up 1 cm plasma |
| Aug 1 2007 12:59:02:940PM | 1070801019 | Earl Marmar | no pcs changes
plasma |
| Aug 1 2007 01:09:29:203PM | 1070801020 | Earl Marmar | raise nl_04 target to 5.5e19
plasma |
| Aug 1 2007 01:38:20:610PM | 1070801021 | Earl Marmar | nl_04 target to 6.5e19
plasma marfe, then disrupt at ~1.4 seconds |
| Aug 1 2007 01:39:37:033PM | 1070801022 | Earl Marmar | reload 1070801020
fizzle |
| Aug 1 2007 01:58:06:743PM | 1070801023 | Earl Marmar | lower the prefill puff to 18 msec (from 20 msec)
plasma |
| Aug 1 2007 02:07:50:910PM | 1070801024 | Earl Marmar | Bt ramping down to 4 tesla
Ip to 600 kA nl_04 target to 4e19 argon enabled, 40 msec puff starting at 0.3 seconds plasma |
| Aug 1 2007 02:21:10:677PM | 1070801025 | Earl Marmar | nl_04 target to 3e19
LPI gate valve enabled plasma something bad happens around 1.23 s (big prad increase) then marfe and 200 kA chunk taken out of the current then the pellet, which the plasma survives disrupt in rampdown (400 kA) |
| Aug 1 2007 02:28:55:327PM | 1070801026 | Earl Marmar | prefill puff to 17 msec (from 18)
nl_04 target to 7e19 plasma |
| Aug 1 2007 02:39:09:883PM | 1070801027 | Earl Marmar | nl_04 target to 8.5e19
plasma significant marfe through the middle of the shot lithium pellet kills it |
| Aug 1 2007 03:10:59:453PM | 1070801028 | Earl Marmar | Bt to 6.8 tesla (raise PLC limit to 195 kA)
Ip to 1 MA nl_04 target to 3e19 (let it fuel from the walls, plus ninja) LIP gate-valve disabled plasma TF was a tad low nl_04 around 1e20 |
| Aug 1 2007 03:10:36:763PM | 1070801029 | Earl Marmar | raise TF PLC limit to 205 kA
increase OH2 PLC limits to 30 kA (second half of swing) plasma |
| Aug 1 2007 03:26:19:830PM | 1070801030 | Earl Marmar | move end-of-flattop earlier to 1.3 seconds
nl_04 target to 1.2e20 LPI re-enabled, shooting late (during ramp-down) plasma some marfe activity got the pellet, plasma ramps all the way down |
| Aug 1 2007 03:41:19:863PM | 1070801031 | Earl Marmar | import segment 2 from 1070801016 into segment 2
lengthen Ip flattop to 1.5 seconds plasma dies about .1 s after pellet |
| Aug 1 2007 03:56:53:850PM | 1070801032 | Earl Marmar | reduce prefill puff to 16 msec (from 17 msec)
move zcur up .5 cm plasma |
| Aug 1 2007 04:04:14:640PM | 1070801033 | Earl Marmar | import segment 2 from 1070801018 into segment 1
move zcur up .5 cm fizzle the RGA is showing very high mass 28 (comparable to mass 4) |
| Aug 1 2007 04:18:27:843PM | 1070801034 | Earl Marmar | reduce prefill puff to 14 msec (from 16)
plasma |
| Aug 1 2007 04:31:28:217PM | 1070801035 | Earl Marmar | reduce nl_04 target to 2e19 (wall + ninja only)
plasma lithium coup de grace last plasma of the day |
| Aug 1 2007 04:35:59:350PM | 1070801036 | Earl Marmar | switching to beam into helium-4 gas (no fields) for MSE
using B-top, PG4 only, 6 psi helium 4 import segment 1 from 1070731003 into segment 1 |
| Aug 1 2007 04:52:23:913PM | 1070801037 | Earl Marmar | reduce prefill puff to 1.28 seconds (from 1.6 seconds)
turn off active mhd turn off segment 2 |
| Aug 1 2007 05:06:34:930PM | 1070801038 | Earl Marmar | no changes
|
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:02:07:437AM | Test | Ok | EFC Chopper PLC Test |
| 2 | 09:12:19:320AM | Test | Ok | EF2U PLC Test |
| 3 | 09:23:05:803AM | Test | Ok | EF2L PLC Test |
| 4 | 09:34:51:740AM | Test | Ok | A-Coil Test |
| 5 | 09:43:32:763AM | Test | Ok | EF3 PLC Test |
| 6 | 09:53:21:497AM | Test | Ok | EF4 Forward PLC Test |
| 7 | 10:03:06:727AM | Test | Ok | EF1U Forward PLC TEst |
| 8 | 10:12:24:797AM | Test | Ok | EF1L Forward PLC TEst |
| 9 | 10:21:47:930AM | Test | Ok | OH1 Forward PLC Test |
| 10 | 10:31:22:520AM | Test | Ok | OH2U Forward PLC Test |
| 11 | 10:41:15:627AM | Test | Ok | OH2L Forward PLC Test |
| 12 | 10:51:56:733AM | Test | Ok | TF 50kA PLC Test |
| 13 | 11:03:28:527AM | Test | Ok | TF 100KA PLC Test |
| 14 | 11:15:52:010AM | Plasma | Ok | |
| 15 | 11:31:56:793AM | Plasma | Ok | |
| 16 | 11:44:59:060AM | Plasma | Ok | |
| 17 | 11:57:29:653AM | Plasma | Ok | |
| 18 | 12:36:41:493PM | Plasma | Ok | |
| 19 | 12:49:25:900PM | Plasma | Ok | |
| 20 | 01:02:55:773PM | Plasma | Ok | |
| 21 | 01:18:06:493PM | Plasma | Ok | |
| 22 | 01:31:04:527PM | Plasma | Ok | |
| 23 | 01:43:42:977PM | Plasma | Ok | |
| 24 | 01:57:19:883PM | Plasma | Ok | |
| 25 | 02:09:55:477PM | Plasma | Ok | |
| 26 | 02:22:32:193PM | Plasma | Ok | |
| 27 | 02:35:05:740PM | Plasma | Ok | |
| 28 | 02:47:42:270PM | Plasma | Ok | |
| 29 | 03:01:38:567PM | Plasma | Ok | |
| 30 | 03:17:19:883PM | Plasma | Ok | |
| 31 | 03:31:50:070PM | Plasma | Ok | |
| 32 | 03:46:06:727PM | Plasma | Ok | |
| 33 | 03:59:07:900PM | Plasma | Ok | |
| 34 | 04:11:44:447PM | Plasma | Ok | |
| 35 | 04:24:22:990PM | Plasma | Ok | |
| 36 | 04:46:14:720PM | Test | Ok | |
| 37 | 04:55:36:887PM | Test | Ok | |
| 38 | 05:04:18:380PM | Test | Ok | |
| System Availability | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Jul 31 2007 10:35:57:733AM | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Session leader: S. Zweben | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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