| Miniproposals | ||||||||||
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| Operators | |
| Session leader(s): | Steve Wolfe,Brian Labombard |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Andy Pfeiffer,Sam Pierson,Bill Parkin |
| Engineering Operator Run Comment |
| MP#298a C-Mod Startup (reverse field)SL: PO: Wolfe |
| Session Leader Plans |
| Entered: May 17 2006 08:55:03:353PM |
| Author: Brian Labombard |
| Run Plan for 1060517 Prepare for MP#409 "SOL Phase space studies" - Reversed Field Goal Continue the SOL 'phase space' mapping studies at 0.8MA and 5.4Tesla, but with reversed plasma current and field direction. Run Preparation Tasks (for probe diagnostics) - Configure ASP bias supplies: PA93 amplifiers ("DC supply") in standard sweep mode, "Sweep A" and "Sweep B" set to -200 volts - Configure divertor probes in standard "sweep" mode Run Preparation Tasks (for optical diagnostics) - Connect the following fiber views for the fast diodes Outer SOL views 1-3,5,7,9-14,31-40 (total of 21) Innerwall SOL views B and C - Connect the following fiber views for the CHROMEX Outer SOL views 18-22,24-29 (total of 11) Innerwall SOL views A,D,E,F - otherwise known as 1,4-6 - Set timing on fastdiode digitizers to 0.1 s after the A-B limiter NINJA puff timing Plan Set up reversed field, LSN and USN discharges that are similar to Shot#1060324005 (LSN, 0.8MA, 5.4T, running on segment#2) and Shot#1060324002 (USN, 0.8MA, 5.4T, running on segment#3) ASP, ISP programmed to scan at 0.65, 0.85, 1.05 seconds NINJA gas puff for GPI and boron V spectroscopy entering plasma at 1.1s Set NINJA for D2 puff at A-B limiter and B016-001. Plenum pressure of 10 PSI. Shots 1,2,3 LSN, NL04 = 0.6, optimize probe targeting 4,5,6 USN, NL04 = 0.6, optimize probe targeting 7,8 USN, NL04 = 0.4 9,10 LSN, NL04 = 0.4 11,12 LSN, NL04 = 0.8 13,14 USN, NL04 = 0.8 15,16 USN, NL04 = 1.0 17,18 LSN, NL04 = 1.0 19,20 LSN, NL04 = 1.2 21,22 USN, NL04 = 1.2 23,24 USN, NL04 = 1.4 25,26 LSN, NL04 = 1.4 Allow for repeated attempts of these shots. Shot total is ~30 |
| Physics Operators Plans |
| Entered: May 16 2006 01:29:56:317PM |
| Author: Steve Wolfe |
Physop Run Plan and Engineering Setup for Wed. 17-May-2006
Power System tests
followed by
MP#298a C-Mod Startup (reverse field)
SL:
PO: Wolfe
Overnight ECDC in D2, bake at 60C
Run starts at 09:00 (lockup at 8:30) ends at 17:00
Power system tests: (assuming alternator is ready)
Operate supplies under PLC control to assure coils
are properly configured for reverse field
For MP#298a (C-Mod startup)
Power systems as on 1060324005 (0.8MA, 5.4T, LSN)
Except: A-coils [-Dtop +Dbot +Jtop -Jbot] which is
reversed from the normal setup.
Gas setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar + 2 psi Ne 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, assuming no vacuum problems:
ECE, VUV, Z-bolo shutters, DNB
Torvac setup: Gate valves open
PCS setup:
Load from 1060324005 (LSN in seg2, USN in seg3)
Flip waveforms for reverse field (all segs)
Call predictor for B21_PROJ (segs 2-4)
Tune startup to taste
Confirm that dpcs_fizzle source_shot=1060516999
Plan:
Get startup to run. Get rid of the runaways on the original shot
Make sure shape is reasonable (compare to 1060324005)
Let RF check things out
Call Brian to take over as SL and start MP#409 shots
which will start from this shot setup.
|
| Session Leader Summaries |
| Entered: May 17 2006 09:58:12:103PM |
| Author: Brian Labombard |
| Run Summary for 1060517 Preparation for MP#409 "SOL Phase space studies" - reversed field Steve Wolfe managed to get a reversed field plasma on the first try today (shot#14). This quick startup allowed us to start setting up for MP#409 on shot#22. After a little scramble, we managed to get the inner wall probe and analysis software to work in the reversed field. Also the A-port probe continued to look ok, having 'recovered' from some deep insertions (unintended) during a previous run of MP#409. By the end of the run, we got some great reversed field target plasmas in LSN and USN with good probe targeting. We have already recorded useful data at NL04=0.68. With continued luck, we hope to have a productive go at MP#409 tomorrow. Quick shot log: ISP pulse duration set to 22 ms. 24- LSN, Ip=0.8MA, NL04=0.68, ASP(+6) could be deeper, FSP (+3) far out, ISP could be deeper 25- fizzle 26- LSN, Ip=0.8MA, NL04=0.68, ASP(+8), FSP (+7), ISP-good - next time try 1mm less gap. 27- USN attempt - fizzle 28- USN, Ip=0.8MA, NL04=0.66-0.63 no probes scanning. 29- fizzle 30- USN, Ip=0.8MA, NL04=0.68, ASP(+8), FSP (+7), ISP-good 31- USN, Ip=0.8MA, NL04=0.68, ASP(+9) excellent, FSP (+7)-ugly!, ISP-great 32- no power shot 33- USN, Ip=0.8MA, NL04=0.46, ASP(+9) excellent, ISP-good |
| Physics Operator Summaries |
| Entered: May 17 2006 06:38:51:023PM |
| Author: Steve Wolfe |
Physics Operator Summary for 1060517
Power System tests (SL/EO: Cochran)
MP#298a C-Mod Startup (SL/PO: Wolfe)
MP#409 SOL Phase Space (SL: LaBombard)
This was a pretty good start to the reverse field mini-campaign.
Power system testing was completed in 13 shots, finishing around noon.
All the coil system connections were verified to have been correctly reversed,
and no engineering problems were encountered.
During the power tests, the Physop was able to troubleshoot two PCS problems:
For the first couple of shots the demands from DPCS were bad (high from
-3.5sec) because I had accidentallty clicked Segment#1 OFF. This resulted
in the gas coming on full from -3.5sec until the fizzle detector gate at 0.08
sec on shot#1, which closed gate valves but was otherwise harmless. Could
have been worse. This was corrected for shot#3 (gas had been turned back off
for #2).
The dpcs_fizzle sequence that I had prepared in saved shot#1060516999 turned
out to be faulty because I neglected to do a build_segment on it, and/or a
build_all on the shot. This caused the Mout demands for the OH's to have the
wrong sign. The problem was noted during the PLC testing, and
corrected. Shots#6 and 7 had the properly built fizzle sequence turned on in
segment 4, with
\dpcs::top.loadables.procedures:async_pros:procedure_01:source_shot set to
$shot, and subsequent shots have source_shot set to 1060517007. This setting
should be maintained for all reverse field shots.
NOTE: If the new Beta PCS GUI is used and a shot from earlier this year loaded
(rather than just importing segments) the value of source shot will need to be
changed back to this shot number. The GUI will pop up a warning/acknowledge
message with this information. At present, the Beta GUI does not provide an
interface for making this change, and it will be necessary to use the
traverser on the model file AFTER LOADING from PCS. I'm working on the
necessary interface and may have it up in the pcs3-Beta directory by the end
of the week.
The first plasma attempt was shot#14, and it ran full length, although the
startup was not pretty. I was so surprised I forgot to load my logbook entry.
The startup was adjusted over several shots, although I would not call the
final program robust it was doing better than on some recent normal field
runs. The major changes were to IC_EF4 (it was too positive) and changing the
sign of the RCUR offset (from +1600 to -1200; the latter value might still be
tweaked a bit to change the Bz ramp rate).
Once the RF got on the air, the power came up quickly to the 3MW level, with
all antennas operating more or less cleanly. We had LSN H-modes on shots
#17-21. For shot#22 and after the RF was off again, so that Brian could start
taking data for MP#409.
The B21_PROJ feedback was broken for the first plasma shots, driving the Acoil
full on while reporting increasing error signals. It turns out that although I
had recalculated all the predictors using the new tap configuration, I had not
updated the nodes in the analysis tree that the predictor code uses to get the
coefficients to use a reverse-field plasma surface to calculate the m/n
spectra. It took me a while to figure out what the problem was and fix the
trees, so from shot#18-25 I either turned the acoil off or ran it under
waveform pre-programming. The B21 scope is returning bogus values (although
the magnitudes are correct, the phases are out by 180deg) for shots before #24
when the trees were fixed, except for #22 which was re-done as noted
below. I'll put a note in the logbook when I update #14-21, and 23.
The relevant tree nodes were updated first in the shot#22 pulse file and then
in the analysis and engineering models by running the routines
~wolfe/idl/error_fields/load_nonaxi_nodes.pro and
load_nonaxi_applied_nodes.pro
with surf_shot=1060517022. The B21_PROJ predictors were then recalculated
again, resulting in sign changes on the coefficients of the acoil current and
180degree orientation change on the projected direction. Once this was done
the AOUT error signals on the B21_PROJ wires again made sense. Feedback was
turned back on in segment 3 for the first upper null shot (#27) and reinstated
in all segments by shot#28. Any shot from #28 on should be ok for B21_PROJ
feedback in any of segments 2-4 (#4 may need to have the integrator C gate
moved up to 0.3sec).
Brian officially started MP#409 on shot#22. We get to count about 3hours of
Research time today. We got a pretty good headstart on the reverse field part
of this experiment, completing one matched density case in lower and upper
null, and getting one shot at reduced density in the upper null
configuration. There were no difficulties getting the flipped target plasmas
to go as programmed, although Brian did want some 2mm tweaks to the gaps for
target optimization.
Shot#32 had a data system problem and had to be bypassed, and there were some
residual dislocations on shot#33. Martin reports that several of his scopes
blew away trying to look at it, and Ian's run_summary routine hung up on
either 32 or 33. It was a good shot though, so hopefully the data Brian needs
are there.
Manfred Bitter and company were here testing their new soft xray spectrometer
system, and from what I understand, they had success. See Manfred and/or John
Rice or Alex Ince-Cushman for details.
Scorecard
---------
Tests 13
Sys err 1
Duds 0
Fizzles 5
Plasmas 14
========= ===
Shots 33
|
| Session Leader Comments | |||
| May 17 2006 02:15:25:290PM | Brian Labombard | Run Plan for 1060518 (with potential to set up for reversed field shots on 1060517) MP#409 "SOL Phase space studies" - Reversed Field Goal Continue the SOL 'phase space' mapping studies at 0.8MA and 5.4Tesla, but with reversed plasma current and field direction. Run Preparation Tasks (for probe diagnostics) - Configure ASP bias supplies: PA93 amplifiers ("DC supply") in standard sweep mode, "Sweep A" and "Sweep B" set to -200 volts - Configure divertor probes in standard "sweep" mode Run Preparation Tasks (for optical diagnostics) - Connect the following fiber views for the fast diodes Outer SOL views 1-3,5,7,9-14,31-40 (total of 21) Innerwall SOL views B and C - Connect the following fiber views for the CHROMEX Outer SOL views 18-22,24-29 (total of 11) Innerwall SOL views A,D,E,F - otherwise known as 1,4-6 - Set timing on fastdiode digitizers to 0.1 s after the A-B limiter NINJA puff timing Plan Set up reversed field, LSN and USN discharges that are similar to Shot#1060324005 (LSN, 0.8MA, 5.4T, running on segment#2) and Shot#1060324002 (USN, 0.8MA, 5.4T, running on segment#3) ASP, ISP programmed to scan at 0.65, 0.85, 1.05 seconds NINJA gas puff for GPI and boron V spectroscopy entering plasma at 1.1s Set NINJA for D2 puff at A-B limiter and B016-001. Plenum pressure of 10 PSI. Shots 1,2,3 LSN, NL04 = 0.6, optimize probe targeting 4,5,6 USN, NL04 = 0.6, optimize probe targeting 7,8 USN, NL04 = 0.4 9,10 LSN, NL04 = 0.4 11,12 LSN, NL04 = 0.8 13,14 USN, NL04 = 0.8 15,16 USN, NL04 = 1.0 17,18 LSN, NL04 = 1.0 19,20 LSN, NL04 = 1.2 21,22 USN, NL04 = 1.2 23,24 USN, NL04 = 1.4 25,26 LSN, NL04 = 1.4 Allow for repeated attempts of these shots. Shot total is ~30 | |
| May 17 2006 02:39:53:023PM | 1060517022 | Brian Labombard | Starting set-up for MP#409 - reversed field Shot 22 NL04=0.65 Ip=0.8, Bt=5.4 REVERSED ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s ASP - far in SOL FSP - far SOL ISP - Good targeting. Next: Bring probes in |
| May 17 2006 03:05:47:570PM | 1060517024 | Brian Labombard | Shot 24 NL04=0.68 Ip=0.8, Bt=5.4 REVERSED ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s ASP - at separatrix FSP - far SOL ISP - Good targeting. Next: repeat with FSP deeper |
| May 17 2006 03:43:38:307PM | 1060517026 | Brian Labombard | Shot 26 LSN, NL04=0.68-0.65 Ip=0.8, Bt=5.4 REVERSED ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s ASP - great target! FSP - Not working very well ISP - Good targeting - best so far. Next: try upper null |
| May 17 2006 03:53:04:820PM | 1060517028 | Brian Labombard | Shot 28 USN, NL04=0.66-0.63 Ip=0.8, Bt=5.4 REVERSED no probes scanning. Next: reduce inner and outer gaps by 2mm and scan probes. |
| May 17 2006 04:22:26:133PM | 1060517030 | Brian Labombard | Shot 30 USN, NL04=0.68 Ip=0.8, Bt=5.4 REVERSED ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s ASP - could be deeper FSP - limping along... ISP - OK, could be deeper Next: Repeat, with ASP deeper and smaller inner gap |
| May 17 2006 04:30:43:947PM | 1060517031 | Brian Labombard | Shot 31 USN, NL04=0.68 Ip=0.8, Bt=5.4 REVERSED ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s ASP - excellent! FSP - limping along...and getting into trouble - time to turn it off. ISP - good Next: Go to NL04 = 0.4 |
| Physics Operator Comments | |||
| May 17 2006 07:42:11:810AM | Steve Wolfe |
Setting up for plasma shots for 1060517,
although they still have to go through the power
test sequence.
Using the old gray PCS for now, since the procedure-editing
pieces of the alpha version aren't quite ready for prime
time yet (but close).
Load from 1060324005 (Brian's shot for MP#409, 800kA,5.4T,6e19)
Seg1: All_Vs :Flip wires 1-9,10,11 (all PF coils, TF)
All_Ps :Flip wires 9-12 (all PF coils, Ip)
Change title to "Reverse field startup"
Seg2: All-Ps :Flip wires 13,15,16 (EF2byEF4,EF4,Ip)
All_Vs :Flip wires 1-9,10,11
Change title "+0.8MA SNL"
Can't redo B21_PROJ because EngOp has tap settings wrong
Seg3: All_Ps :Flip wires 13,15,16
All_Vs :Flip wires 1-9,10,11
Zero Acoil_cur (this was just wrong at 2500)
Change title
Try to remember to redo B21_PROJ later
Seg4: All_Ps :Flip wires 13,15,16
All_Vs :Flip wires 1-9,10,11
Change title
Try to remember to redo B21_PROJ later
Load at 17-May-2006 07:41:45.00
Open tree /home/wolfe/pcs_scratch -1
Open tree done
| |
| May 17 2006 07:46:15:843AM | Steve Wolfe | Continuing to set up for run 1060517 Seg1: Br0 from .0002 to 0.000 PG4 from 22ms to 20ms Note IC_EF4U=+1335A, leave it for now Load at 17-May-2006 07:45:54.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done | |
| May 17 2006 08:15:33:797AM | Steve Wolfe | Andy has updated the C-Coil tap settings, so I can go ahead and recalculate the B21_PROJ predictors Do it in segs 2-4, check version return for setup= -Dtop +Dbot +Jtop -Jbot . I hope this is all correct. It's possible I should have just left them alone, since the helicity is the same? Go with it this way, if I'm wrong we'll need a cell access to fix it, but if I think about it any more I'm sure to get it wrong! Load at 17-May-2006 08:12:43.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done | |
| May 17 2006 09:10:50:907AM | 1060517001 | Steve Wolfe | Shot#1: EF2U PLC test. We will have gas on the first shot Got a lot of gas on that shot? Fizz should have taken it out at .08sec Also lots of magnetics errors for low signal, but that's expected. Looks like B-main puff was on from very early? DPCS is doing something weird too, it exited early, couldn't find the fizzle segment? Turn off gas for now. Something is broken in the PCS setup. |
| May 17 2006 09:16:09:110AM | 1060517002 | Steve Wolfe | Shot#2: EF2L test, no gas this time. No PCS change yet, still trying to figure out what happened For next shot I'll disable the dpcs_fizz and see if that is all that's wrong. |
| May 17 2006 09:57:16:453AM | 1060517002 | Steve Wolfe | Shots#1 and 2 had crazy saturating outputs on DPCS because Seg 1 had been switched off (operator error). Seg2 was on/sync with a start_time=0.1sec All the waveforms seem to have been full on at t=-3.5sec, which is NOT what I would have expected, but maybe it will make sense if I look at what the code does in extrapolating backward in this case. There were also errors in the log file associated with assembling the dpcs_fizzle waveform from segment 4 of shot 1060516999. I think I had this set up correctly yesterday, but may not have. The dpcs_fizzle routine was disabled on shot#3, on which I turned seg1 back on (and ran ok) |
| May 17 2006 09:30:44:733AM | 1060517003 | Steve Wolfe | Shot#3: disable the dpcs_fizz routine and see if that is all that's wrong. This will be EF3 test, PLC control I see what's wrong, Seg1 is off! Reload, leave dpcs_fizzle off for now, it was giving an error. Load at 17-May-2006 09:23:29.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done OK, those Mouts look more reasonable, except that the dpcs_fizzle isn't there of course. Next shot: reenable dpcs_fizzle and see if that was also because there was no seg1 of a different problem |
| May 17 2006 10:12:46:093AM | 1060517004 | Steve Wolfe | Shot#4: EF4 forward bridge dpcs_fizzle enabled in dpcs::top.loadables.procedures:async_pros:procedure_01 with source_shot=1060516999, segments=[4]; if I screwed up making those pulse files I may have to re-do this with a local seg4. Looks ok, positive current in EF4. Fizzle sequence (with backporch) triggered ok. Positive Bz confimed. Note there is reverse current in EF3, so the mflux isn't as straight as I might expect. I'm not positive the polarity of the oh demands after fizzle trig makes sense? Next shot: re-enable gas |
| May 17 2006 10:20:02:500AM | 1060517005 | Steve Wolfe | Shot#5: re-enable gas (B-top,B-main). EF1U only test. Got some gas. EF1U positive current. Gas looks good. I'm not happy with the sign of the Mout demands on the fizzle sequence. The aout signals seem ok, but the voltages are the same sense as the pre-charge. Maybe I needed to do a build before saving the pcs tree? |
| May 17 2006 10:31:22:763AM | 1060517006 | Steve Wolfe | Shot#6: EF1L PLC test. Import seg4 from 1060516999 Interesting that it gave me the warning message Do a build segment on seg4 Build_all, Click On/Async and do it again(build_seg, build_all) Load into model Load at 17-May-2006 10:24:21.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Change source_shot from 1060516999 to $shot EF1L positive current Fizzle demands for oh's are in opposite direction this time. ** Needed to do the build ** |
| May 17 2006 10:47:00:013AM | 1060517007 | Steve Wolfe | Shot#7: Reload with seg4 title changed to "reverse field fizzle" Change dpcs_config:config_id to ask for 1060517007 OH1 forward bridge test. OH1 positive current, get negative Bz Looks ok. Next is oh2u forward bridge Change source_shot from $shot to 1060517007 |
| May 17 2006 10:57:55:623AM | 1060517008 | Steve Wolfe | Shot#8: oh2u forward bridge Change dpcs_fizzle source_shot from $shot to 1060517007 Turn off seg4 Load at 17-May-2006 10:47:59.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done OH2U positive current, fizzle signals still look ok. Negative radial field, ok. Next: OH2L test. Re-import seg 4 from earlier shot |
| May 17 2006 11:09:39:280AM | 1060517009 | Steve Wolfe | Shot#9: OH2L test. Re-import seg 4 from shot#3 (this is dn->un ssep control; I don't want it,but it's there) Click sync (already off) and load Load at 17-May-2006 10:59:54.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done OH2L positive current, positive radial field ok next: TF test |
| May 17 2006 11:29:48:797AM | 1060517010 | Steve Wolfe | Shot#10: TF test, no PCS changes Positive 50kA TF current Bz=+3mT, mflux doesn't look like I remember it for TF only? There's a null near R=1m, Z=0. Btor is positive all right. OK. |
| May 17 2006 11:34:45:203AM | 1060517011 | Steve Wolfe | Shot#11: TF 100kA test TF test ok Next: Chopper test |
| May 17 2006 11:51:25:513AM | 1060517012 | Steve Wolfe | Shot#12: Chopper test (Hybrid control) OK, got reverse current from normal next: program acoil in seg1 |
| May 17 2006 12:12:34:140PM | 1060517013 | Steve Wolfe | Shot#13: program acoil in seg1 [-.9 to 0] at 2000A Acoil pulse ok (we'll see if the polarity is what I want, but it's undoubtedly what I asked for) Engineering setting had the old tap settings. Change it manually, so I can stare at the result and still be confused. Next: Zero acoil current waveform in seg1 Go for plasma |
| May 17 2006 05:42:08:620PM | 1060517014 | Steve Wolfe | Shot#14: plasma full length. Startup ugly, but it made it. No runaways apparent on the TV, neuts/hards and bolo signals missing. H-alpha trace looks strange, slow wobulations. Current trace ok, density all over the place (but mostly lower than program). Bz very positive. |
| May 17 2006 12:36:30:860PM | 1060517015 | Steve Wolfe | Shot#15: enable b-side lower (50ms). Ef4 from 1335 to 1320 Fizzle. Still hesitating, looks like multiple bounces, loses it vertically. next: Change rcur offset from 1600 to 0. |
| May 17 2006 12:52:42:220PM | 1060517016 | Steve Wolfe | Shot#16: Change rcur offset from +1600 to 0. If this helps, I may go to -1600 next. RF is supposed tp fire on this shot (if it goes) Plasma full length, but had runaways. See if neuts/hards trace is back after Matt fixed it; Yep. Startup nicer, still a little positive on Bz, some bounciness before 15msec. Got RF, H-alpha looking better (still L-mode). One big injection around 1.0sec. next: raise nl04 a little, drop ef4 another 10amps |
| May 17 2006 01:13:35:217PM | 1060517017 | Steve Wolfe | Shot#17:ef4 from 1320 to 1310. nl04 from 6e19 to 8e19. Plasma. Still runaways, but I think we got H-modes that time. Injection at .71sec, H-modes look ELM-free. I think A-coil is doing the wrong thing though. It seems to be coming on at .5sec, and going to the rail. Must have something wrong. Well, the .5sec is because the integrator gate is set wrong. Change that to .3sec. However, the feedback looks backward based on the b21 scope. Also from the Aout signal. Turn it off for a shot. |
| May 17 2006 01:25:08:533PM | 1060517018 | Steve Wolfe | Shot#18:B21_PROJ gains from P=1.0 to 0. and I=4.0 to 0 RCUR offset from 0 to -1000. Plasma, still with runaways and H-modes That one looks like a bouncer in startup. Another injection around 0.7sec Next: More negative again on ef4. Run Acoil pre-programmed |
| May 17 2006 01:45:41:883PM | 1060517019 | Steve Wolfe | Shot#19: EF4 from 1310 to 1300. Program 2000A on Acoil from .6 to 1.5 (flattop interval) Plasma, still getting runaways. Brian poked on this shot. Bounce is worse this time. Am I going the wrong way on EF4? According to the b21 scope, intrinsic field is at +21deg and applied is -158, so they should be compensating. Don't understand the feedback driving it to the rail. Could the controller gain be backward? Leave it on manual for now, and tweak at the startup. |
| May 17 2006 02:04:15:980PM | 1060517020 | Steve Wolfe | Shot#20: pg4 from 20 to 24msec (asking for a fizzle) plasma, xrays not as bad, looked like an h-mode on the tv Runaways look gone. Startup plasma moves out, almost loses it; bz not rising (negatively) fast enough. The B21_Proj error signal is going the wrong way. All the predictor terms have reversed sign. I think somehow the Acoil one shouldn't. This may be a bug in the algorithm, or in the values stored in the tree. I think possibly this is because somewhere I've got a surface normal set for a negative current plasma! However, in that case, I could also be fooling myself about whether I've got the configuration right, too. Next: RCUR offset one way or the other. |
| May 17 2006 02:10:59:023PM | 1060517021 | Steve Wolfe | Shot#21: RCUR offset from -1000 to -1600 Plasma, injection early (.7sec), but survived. RF, H-modes, probes. Less of an outward swing on startup, no runaways Next: repeat. RF off, Brian will poke deeper. I'm going to stare at some error field routines and see if I can sort out what these traces mean. If we stop getting H-modes, maybe I'll be able to test whether the acoils should be in this direction or not by making and/or suppressing a locked mode. |
| May 17 2006 02:21:09:807PM | 1060517022 | Steve Wolfe | Shot#22: Repeat plasma, no runaways, no injection startup ok, no bounce No locked mode. According to the b21 scope, B21 is below 2G, intrinsic up to 6G. Next: Acoil off |
| May 17 2006 02:33:21:307PM | 1060517023 | Steve Wolfe | Shot#23: Acoil off. Fizzle. Big lump on the Halpha, looks inside. Next: drop the gas. |
| May 17 2006 03:00:12:167PM | 1060517024 | Steve Wolfe | Shot#24: PG4 from 24 to 22ms. Acoil off. Plasma, no runaways. Probe, no rf (by design) Bz now is beginning to look a little too negative, but startup is nice. No sign of a locked mode. I/n isn't high enough for an intrinsic I guess. Max amplitude of b21 is about 5G according to the B21 scope. The aout scope also says B21_PROJ=+.0005 (whatever the sign means). |
| May 17 2006 03:09:12:213PM | 1060517025 | Steve Wolfe | Shot#25: Recalculate the B21_PROJ predictor in seg2. It now says 21-Jul-2005,total 2/1 non-axisymmetric field at phi= 18.67 degrees, Acoil=-DTOP+DBOT+JTOP-JBOT (used to say -158 degrees) Leave Acoil off, look at aout signal on this one. Another fizzle. Better work on the startup some more. Lumpy halpha again, bz too negative or too much gas? Next: Brian wants to decrease left gap by 2mm |
| May 17 2006 03:24:08:163PM | 1060517026 | Steve Wolfe | Shot#26: PG4 back to 20msec from 22 CLEARIN from .0015 to -.0005 RCUR from .658 to .657, etc. Put acoil back on at 2000A (note Acoil coeff in predictor changed sign) plasma, no runaways. startup ran outside a bit, but no bounce. AOUT for B21_PROJ now agrees that the acoil is reducing the error field. Next shot: Go to seg3 (upper null) |
| May 17 2006 03:33:46:917PM | 1060517027 | Steve Wolfe | Shot#27: Go to uper null (seg 3) Recalculate B21_PROJ predictor (again), and leave it on. Set integrator gate to 0.3sec in seg3. Set nl04 from 6 to 8e19 Increase pg1 puff from 40 to 50ms Fizzle. Still lumpy and moving inside. I need to either adjust EF4 of Rcur offset |
| May 17 2006 03:49:37:837PM | 1060517028 | Steve Wolfe | Shot#28: EF4 from 1300 to 1310 Rcur offset from -1600 to -1200 Go ahead and recalculate the b21_proj predictor in seg4 Turn the B21_PROJ gains in seg2 (P=1.0, I=4.0) and zero the acoil current on seg2 all_v screen That should leave this set up for tomorrow, with all segments ready. Plasma no runaways. Bz still looks a little high, lump on Halpha is earlier. B21_PROJ feedback looks ok now. Next: Brian wants 2mm less inner gap, and also outer gap less by 2mm Figure out what to do with this startup. |
| May 17 2006 04:06:00:057PM | 1060517029 | Steve Wolfe | Shot#29: Decrease CLEARIN from -.001 to -.003 Ef4 from 1310 to 1320. Pg4 from 20ms to 18ms Fizzle. Bouncer, Got a magnetics error "f13 does not have finite signal". Put back the 2ms on pg4 |
| May 17 2006 04:12:55:337PM | 1060517030 | Steve Wolfe | Shot#30:PG4 from 18 to 20msec CLEARIN still at -.003 Plasma, poky probe, some runaways. Still bouncing in startup. Injection at .13sec. Next: put back 5amps on ef4 |
| May 17 2006 04:25:11:820PM | 1060517031 | Steve Wolfe | Shot#31: ef4 form 1320 to 1315 Another 1mm on CLEARIN, -.003 to -.004 plasma, a few runaways, still bouncy. gaps are smaller, as requested. Next: add 2ms on pg4 |
| May 17 2006 04:41:49:650PM | 1060517032 | Steve Wolfe | Shot#32: pg4 from 20 to 22msec Decrease nl04 from 8 to 5.5e19; decrease pg3 in seg3 No Power Shot, data system problem |
| May 17 2006 04:59:49:480PM | 1060517033 | Steve Wolfe | Shot#33: pg4 from 20 to 22msec Decrease nl04 from 8 to 5.5e19; decrease pg3 in seg3 Plasma, no runaways, startup swinging outside but no bounce. Bill had to blow away a bunch of CAMAC inits. Density looks good at 4.5e19. Brian's happy, I'm happy. Quit while we're ahead. END OF RUN. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:02:47:580AM | Test | Ok | EF2 Upper 3KA 500V PLC Test |
| 2 | 09:13:37:530AM | Test | Ok | EF2 Lower 500V 3KA |
| 3 | 09:26:11:437AM | Test | Ok | EF3 3KV 3KA |
| 4 | 09:58:37:467AM | Test | Ok | EF4 Forward Bridge Test 1KV 2KA |
| 5 | 10:13:17:907AM | Test | Ok | EF1 Upper forward bridge test +500V 2KA |
| 6 | 10:28:00:953AM | Test | Ok | EF1L Forward Bridge Test 500V 2KA |
| 7 | 10:40:23:780AM | Test | Ok | OH1 Forward Bridge test 1KV 2KA |
| 8 | 10:53:06:843AM | Test | Ok | OH2 Upper Forward Bridge Test 300V 2KA |
| 9 | 11:06:46:013AM | Test | Ok | OH2 Lower Forward Bridge test 300V 2KA |
| 10 | 11:19:33:390AM | Test | Ok | TF 50KA Reverse field |
| 11 | 11:31:59:297AM | Test | Ok | TF 100 KA Reverse field |
| 12 | 11:44:37:343AM | Test | Ok | EFC 400V/1.0KA Reverse field |
| 13 | 11:55:17:373AM | Test | Ok | A-coil test |
| 14 | 12:13:17:060PM | Plasma | Ok | |
| 15 | 12:26:34:220PM | Plasma | Ok | |
| 16 | 12:47:38:000PM | Plasma | Ok | |
| 17 | 01:01:14:140PM | Plasma | Ok | |
| 18 | 01:18:38:843PM | Plasma | Ok | |
| 19 | 01:35:31:500PM | Plasma | Ok | |
| 20 | 01:48:13:680PM | Plasma | Ok | |
| 21 | 02:00:49:353PM | Plasma | Ok | |
| 22 | 02:15:28:307PM | Plasma | Ok | |
| 23 | 02:28:39:980PM | Plasma | Ok | |
| 24 | 02:52:59:620PM | Plasma | Ok | |
| 25 | 03:05:45:667PM | Plasma | Ok | |
| 26 | 03:18:29:120PM | Plasma | Ok | |
| 27 | 03:31:13:493PM | Plasma | Ok | |
| 28 | 03:43:50:900PM | Plasma | Ok | |
| 29 | 03:56:34:023PM | Plasma | Ok | |
| 30 | 04:09:03:010PM | Plasma | Ok | |
| 31 | 04:21:32:883PM | Plasma | Ok | |
| 32 | 04:35:28:870PM | Test | Bad | |
| 33 | 04:52:42:290PM | Plasma | Ok | |