| Miniproposals | ||||||||||
|
| Operators | |
| Session leader(s): | John Liptac |
| Physics operator(s): | Steve Wolfe |
| Engineering operator(s): | Bill Cochran,Bill Parkin |
| Engineering Operator Run Comment |
| Run Plan 1060307 LH Commishioning Experiments MP 418 |
| Session Leader Plans |
| Entered: Mar 6 2006 10:14:53:227AM |
| Author: Ron Parker |
| Run Plan 1060307 LH Commishioning Experiments MP 418
Session Leader: Liptac, Parker Plasma Conditions: Same type of plasmas as for the Ti coupler commishioning experiments, 1050414. Low density L-mode, lower single null, nl_04~0.6, B0=5.4 T, and Ip~ 700kA. No ICRF. Goals: �?� Measure LH coupling, ie reflection coefficients, for different antenna phasings and plasma densities at the LH grill. �?� Characterize the plasma density at the coupler at various coupler positions and outer gap sizes. �?� Examine 3rd harmonic arc detection. LH setup: Begin with the launcher at 1650 counts. Set mechanical phase shifters to 90 degree current drive phasing. 20 kW per klystron. Operation: Coupler position scan Shot 1: single segment, 90 degree ideal CD phasing. Setpoint generator settings: Shot Length=30 ms, Duty Cycle=33%, Pulse Period=30 ms. Shot 2: two segments, 90, and 120 degree CD phasing. Setpoint generator settings: Shot Length=60 ms, Duty Cycle=33%, Pulse Period=30 ms. Shot 3: three segments*, 60, 90, and 120 degree CD phasing. Setpoint generator settings: Shot Length=90 ms, Duty Cycle=33%, Pulse Period=30 ms. Shot 4: four segments*, 60, 90, 120, and 150 degree CD phasing. Setpoint generator settings: Shot Length=120 ms, Duty Cycle=33%, Pulse Period=30 ms. Shot 5: five segments*, 60, 90, 120, 150, and 180 degree CD phasing. Setpoint generator settings: Shot Length=150 ms, Duty Cycle=33%, Pulse Period=30 ms. Shot 6: five segments*, 180, 150, 120, 90, and 60 degree CD phasing. Setpoint generator settings: Shot Length=150 ms, Duty Cycle=33%, Pulse Period=30 ms. Cell access to change coupler to intermediate position ~1625 counts. Shot 7: five segments*, 60, 90, 120, 150, and 180 degree CD phasing. Setpoint generator settings: Shot Length=150 ms, Duty Cycle=33%, Pulse Period=30 ms. Cell access to move coupler position as close as we are comfortable ~1600 counts. Shot 8: five segments*, 60, 90, 120, 150, and 180 degree CD phasing. Setpoint generator settings: Shot Length=150 ms, Duty Cycle=33%, Pulse Period=30 ms. Outer gap scan* running as many segments as we can. Shot 9: five segments*, 90, 90, 90, 90, and 90 degree CD phasing. Keeping outer gap constant to establish baseline. Shot 10: 90 degree ideal CD phasing. Cell access to set phase shifters to 60 degrees. Shot 11: 60 degree ideal CD phasing. Cell access to set phase shifters to 120 degrees. Shot 12: 120 degree ideal CD phasing. Cell access to set phase shifters to 150 degrees. Shot 13 150 degree ideal CD phasing. Cell access to set phase shifters to 180 degrees. Shot 14 180 degree ideal CD phasing. *Can run up to 20 segments/shot, depending on how it goes- more segments the better |
| Physics Operators Plans |
| Entered: Mar 6 2006 08:20:52:733PM |
| Author: Steve Wolfe |
Engineering setup for Tuesday 7-Mar-2006 MP 418 Low power LH Commissioning Session leader: Liptac,Parker Physics operator: Wolfe Overnight ECDC in D2, and bake at 60 C. Run begins at 09:00 and ends at 17:00 Power systems as on 1050414014 (0.7 MA, 5.4 T, lower single null) Fizzle delay on OH1 and OH2's=300msec, Fizzle delay on TF=600ms 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 + 2psi Neon 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 Leave DISABLED Enable the following gate valves, assuming no vacuum problems: ECE, VUV Torvac setup: Gate valves open ICRF: All four transmitters in RUN-ON by 08:30. ICRF will be allowed to fire after 0.9 sec for at least the first several shots. Thereafter it depends on how long the LH pulses can be extended. Run plan: Start from seg2 of 1050414014, with (D)PCS changes as follows: Re-compute magnetics predictors because of BP16 coil change in 1051101 Add B21_proj wire and take away Acoil programming on V screen. I also intend to run using the beta test version of PCS, and to at least test out the new dpcs_xjump routine to ramp-down runaway shots early. This is a safety feature for the LH launcher when it is moved to its forward position, which is planned for shot#8. The in-shot outer gap scan called for in shot 9 and after in the SL_PLAN will need to have steps in position timed to coincide with the LH pulses segments. We'll continue to keep track of the C-right cooling. As of Monday it is clearly slow to cool, but it looks like we should be able to keep up with the shot cycle. |
| Session Leader Summaries |
| Entered: Mar 8 2006 07:57:17:843AM |
| Author: John Liptac |
| The run was very successful! A tremendous amount of coupling data was collected, and unambiguous, non-destructive verification of the LH power affecting the plasma was observed on shots 12 and 16. It was particularly clear on shot 16 where the power was increased to 30kw/klystron. All of the coupling data was gathered at 20kW/klystron.
There was no evidence of arcing. A "mystery cloud" appeared on some of the early shots. It was particularly visible on shot 5, but at a position far from the LH grill on wide2. Playing with the video display settings also revealed a low intensity glow near the antenna. The cloud's intensity diminished on later shots. Coupler position scan completed, with multiple segments. A maximum of 6 segments were used. The LH phase control was demonstrated and results seemed to track qualitatively with what was expected. There is a very large amount of data to analyze to get quantitative results. A position of 1650 counts produced too low a density to be useful. The antenna was moved toward the plasma gradually and ended at a position of 1615 counts. The level of nl04 density also impacted the density at the grill significantly. 6 segments were used, keeping the phase constant, while the outer gap was increased by 2 mm between each segment in order to lower the density. The position of the antenna was left at 1615 for these experiments. Ideal phase coupling was studied using 90,120,150, and 180 degree phasing. The data errors at the end of the run prevented 60 degree phasing from being tested. |
| Physics Operator Summaries |
| Entered: Mar 7 2006 05:49:58:820PM |
| Author: Steve Wolfe |
A pretty successful run. John got almost all of his run plan completed.
Unforutunately, we ended up with a no TF shot and two data system
malfunctions that prevented his getting the last point on the scan of
the mechanical phase shifter.
I tried the "soft ramp-down" adaptive programming with the dpcs_xjump
routine on shot 4, which in fact had runaways and was ramped down
successfully. However, the way this jump-ahead sequence was implemented
it had the effect of shifting the gate for the dpcs_fizzle routine,
which meant that the oh's were not reverse swung after the plasma
termination at 0.5sec. This resulted in high coax resistance on the
subsequent shot. The dpcs_xjump routine was turned off for the remainder
of the run, and the technique will need to be modified before we try
it again. See my notes in the logbook for shot#4 for more details.
Many of the shots today had early runaways, but these tended to go away
during the pulse. Nevertheless, the presence of a tail was apparently
a factor in some of the LH results. In particular, on shots with
an early runaway component we often saw what may have been a synchrotron
(visible) beam on some of the visible light diagnostics, including the
video views. See comments in the logbook by Reinke, Marmar, and others.
In trying to get rid of the runaways, I ended up with pg4 puffs as long
as 47msec. Later in the day I backed this down to 40msec. The two fizzles
we had were probably caused by too much pre-puff.
The B-side main (PG3) Piezo was not opening reliably today. It seemed
to take about .8sec at high voltage before it actually started passing gas.
Since the target density was quite low this was not noticed until fairly
late in the day. We experienced something similar when we ran in
February. Tommy is going to zap the valve with a power supply after
the run.
The only operator action required for today's experiment, aside from
trying to get rid of runaways and avoid fizzles, was programming a
step-wise gap scan during the pulse. This took a while to draw, but
seemed to do the right thing. Examples (all alike) are shots #15,17,19,21.
The main worry today was a high joint resistance on TF turn #49 (E-left)
bottom-middle tap. This went as high as 10uOhm on the post shot scanner.
The camac instrumentation was moved to include this turn and we ran a
couple of TF only shots, which showed values in the 3uOhm range, somewhat
higher than any of the other turns being digitized. We put a back porch
on the TF and continued to monitor the resistance through the run. There
was some trend toward lower scanner values after full length shots,
higher (up to 10.3uOhm) following fizzles. This bears watching. It
may improve at higher fields, which are planned for tomorrows run.
Note that the fizzle detector programming may need to be adjusted in
order to get a back porch after Bob and Val's programmed disruptions
tomorrow. The present programming causes the TF to ramp down after
about 600msec.
Scorecard:
----------
Tests 3
Duds 1 (no TF)
No power (DAQ) 2
Fizzles 2
Plasmas 16
---------- ---
Shots 24
All plasmas went full length, except for shot#4 which ramped down
early under adaptive program control. No disruptions today.
But wait until tomorrow!
|
| Session Leader Comments | |||
| Mar 7 2006 09:06:05:783AM | John Liptac | LH test shots look ok. Phase on 10 looks a little off ~35 degrees, but should be ok for the tests today.
Begin with coupler at a position of about 5 mm behind limiter ~1650 counts. Actual position behind limiter is unkown as the stops failed. Position will be adjusted according to density at the grill. Three positions are planned ~1650, ~1625, ~1600. The calibration is ~10 counts/mm. | |
| Mar 7 2006 09:26:53:313AM | 1060307001 | John Liptac | No power shot to test CAMAC. LH power into dummy loads to check timing. Can check LH camera as well.
Fizzle detector prevented power for LH, timing looks good though. LH camera worked frame at 0.702 s |
| Mar 7 2006 09:44:31:110AM | 1060307002 | John Liptac | 10 ms LH pulse at 0.7 s. Plasma right out of the gate! 246 kW from IQ detectors. Nothing on the LH camera. |
| Mar 7 2006 10:11:06:160AM | 1060307003 | John Liptac | 90, 120 degree phasing start time of 0.695 s to better capture on camera. 246 kW from IQ detectors. Nothing on the LH camera. phase looks just like test shots, pretty good! Need to move launcher in to get higher density, it's too low 2e17m-3. |
| Mar 13 2006 01:18:44:760PM | 1060307004 | John Liptac | Launcher moved to 1629 counts, in a couple of mm to increase the density.
Shot terminated by Steve's x-ray protection. At this position couplers should be safe ~ 3 mm in, so the probes should be behind the limiter. Try three segments again. Nothing on HXR camera of note for the last three shots. |
| Mar 7 2006 10:38:48:160AM | 1060307005 | John Liptac | Three segments:
60, 90, 120, degree phasing. Start time of 0.695 s to better capture on camera. IQ power: ~237 kW LH Camera: Nothing on LH camera. Made two flashes corresponding to 2nd and third segments on wide2 0.733 0.767. Density: 1e18 |
| Mar 7 2006 10:54:09:970AM | 1060307006 | John Liptac | Four segments:
60, 90, 120, 150 degree phasing. Start time of 0.695 s to better capture on camera. IQ power: ~238 kW LH Camera: Nothing on LH camera. Nothing on wide2 Density: 1e18 |
| Mar 7 2006 11:11:59:440AM | 1060307007 | John Liptac | Five segments:
60, 90, 120, 150, and 180 degree phasing. Start time of 0.695 s to better capture on camera. IQ power: ~238 kW LH Camera: LH camera has low intensity glow if viewed using high contrast settings. Nothing on wide2 Density: 1e18 looks good. |
| Mar 7 2006 11:53:28:253AM | 1060307008 | John Liptac | Five segments:
180, 150, 120, 90, and 60 degree phasing. Start time of 0.695 s to better capture on camera. IQ power: ~244 kW Density: 1e18 |
| Mar 7 2006 12:38:19:680PM | 1060307009 | John Liptac | Launcher moved in to 1620, 1 mm, to increase density.
Five segments: 60, 90, 120, 150, and 180 degree phasing. Start time of 0.695 s to better capture on camera. IQ power: ~238 kW Density: 2-2.5e18 m-3, a good density. Brambilla code shows best coupling around 3e18 m-3. Complete phase scan. |
| Mar 7 2006 12:59:11:087PM | 1060307012 | John Liptac | Launcher moved in to 1615, 0.5 mm, to increase density.
Six segments: 60, 90, 120, 150, 180, and 90 degree phasing. Start time of 0.695 s. IQ power: ~238 kW Density: 1-2e18, as the nlo4 went down Maybe evidence of LH on HXR and ECE |
| Mar 7 2006 01:18:17:600PM | 1060307013 | John Liptac | Try to increase nl04
Six segments: 60, 90, 120, 150, 180, and 90 degree phasing. Start time of 0.695 s. IQ power: ~238 kW Density: ~2e18 Maybe evidence of LH on HXR again |
| Mar 7 2006 01:21:57:413PM | 1060307014 | John Liptac | Try to increase nl04 for coupling
Six segments: 60, 90, 120, 150, 180, and 90 degree phasing. Start time of 0.695 s. IQ power: ~238 kW Density: ~2.5e18, as the nlo4 went down Signal down on HXR |
| Mar 7 2006 01:42:15:757PM | 1060307015 | John Liptac | Gap scan, moved 2 mm out between each segment. Should decrease the density for each segment.
Six segments: 90 degree CD phasing. Start time of 0.695 s. IQ power: ~238 kW Density: drops as expected Signal down on HXR great result |
| Mar 7 2006 03:08:39:740PM | 1060307016 | John Liptac | Reload 12 and increase LH power to 30kW/klystron all 90 degree CD phasing. Try to make some x-rays.
Six segments: 90 degree CD phasing. Start time of 0.695 s. IQ power: ~390 kW Density: ~2.5e18 m-3 great for coupling! HXR and ECE results! HXR x-rays ~30-40 keV |
| Mar 7 2006 03:35:27:443PM | 1060307017 | John Liptac | Back to gap scan, reload 15. Back down to 20kW/klystron to be consistent with previous shots.
Six segments: 180 degree phasing. Start with 180 since this phase should show the biggest change in going from approximate to ideal phasing. Start time of 0.695 s. IQ power: ~244 kW Density: ~1-2e18 m-3 over gap scan Phase on klystron 10 looks off ~ 47 degrees. No signal on HXR as expected. |
| Mar 7 2006 03:51:35:757PM | 1060307019 | John Liptac | Gap scan-
Six segments: 150 degree ideal CD phasing. Start time of 0.695 s. Power: 20kW/klystron IQ power: ~250 kW Density: 1-2e18 m-3 over gap scan density goes up again for last segment. No signal on HXR. |
| Mar 7 2006 04:19:50:883PM | 1060307021 | John Liptac | Gap scan-
Six segments: 120 degree ideal CD phasing. Start time of 0.695 s. Power: 20kW/klystron IQ power: ~250 kW Density: 1-2e18 m-3 over gap scan still increases for last segment. Data slow coming back. |
| Physics Operator Comments | |||
| Mar 6 2006 06:00:09:723PM | Steve Wolfe |
Starting to set up for tomorrow's run.
I'm going to blow away some of the dpcs setup stuff that
I was working on today, but I'll put it back when it's ready.
Bring up a fresh pcs from /usr/local/cmod/codes/pcs3-Beta
Load from 1060210017 (last shot). That's going to wipe out
my dpcs_xjump in the model (when I load it), but that's ok.
Leave the startup as is:
Br_0=+.0002 (I may want to change that)
Rcur offset=1600
ic_ef4 = -1350A
pg4=28msec
Import seg2 from 1050414014
Need to recalc all the magnetics predictors
It won't import the dpcs because the tree is too old. Ok.
All magnetics predictors recalculated (including all three RCUR instances
on wire 1)
Copy B21_PROJ from wire 9 in segment 3 onto wire 9 of segment 2 (was
bolofeed) Didn't work, got another bolofeed? Ah, I haven't loaded it.
I need to specify the scratch area /home/wolfe/pcs_scratch. That got it.
Change the title from "1.0 MA SNL fiducial" to "0.7MA SNL LH target"
Build all
Got timestamp errors on p13, p15 seg2. Touch the points in all-p's
Build all (again)
Almost forgot- Go to v01-16 screen in seg2 and zero the acoil current
waveform
Build all (again)
Save as /home/wolfe/pcs_trees/ 1060307000
Load/Clean
Filling in configuration / 1-NOV-2005 12:26:36.00/
Filling in DPCS configuration /22-DEC-2004 09:58:59.00/
Cleaning PCS tree in /home/wolfe/pcs_scratch
Cleaning DPCS tree in /home/wolfe/pcs_scratch
about to ask alcdata to copy /home/wolfe/pcs_scratch/pcs_model to /cmod/trees/models/pcs/pcs_model
about to ask alcdata to copy /home/wolfe/pcs_scratch/dpcs_model to /cmod/trees/models/dpcs/dpcs_model
Load at 6-Mar-2006 17:59:43.00
Open tree /home/wolfe/pcs_scratch -1
Open tree done
| |
| Mar 6 2006 06:12:28:260PM | Steve Wolfe |
Now to set up the dpcs_xjump procedure again.
In a fresh IDL
IDL> path = !path
IDL> !path = expand_path('+/usr/local/cmod/codes/dpcs')+':'+path
IDL> .r dpcs_load_procedure
% Compiled module: DPCS_ADD_PROCEDURE_NAME.
% Compiled module: DPCS_LOAD_PROCEDURE.
IDL> mdsopen,'hybrid',-1
IDL> dpcs_load_procedure,'async_pros','dpcs_xjump',/add,/off
% Compiled module: DPCS_SAVE_CTX.
% Compiled module: MDSPUT.
% DPCS_ADD_PROCEDURE_NAME: Added routine name dpcs_xjump to \DPCS::TOP.LOADABLES.PROCEDURES:ASYNC_PROS:PROCEDURE_02
% Compiled module: MDSSETDEFAULT.
% Compiled module: MDSTCL.
% Compiled module: DPCS_RESTORE_CTX.
IDL> parameters = {threshold:1e14,gate:[.12,.6],jump_to:1.6,tavg:.01}
IDL> dpcs_load_procedure,'async_pros','dpcs_xjump',{parameters:parameters}
% Compiled module: SERIALIZE_STRUCT.
So that loads the parameters with some reasonable values; the node is
off, so we'll start without it.
Now, just to be sure I don't lose this
Load From -1
Save as /home/wolfe/pcs_trees 1060307999
So now I should have both of them saved.
| |
| Mar 7 2006 08:02:35:253AM | Steve Wolfe |
Today we will be testing a new callable procedure in
DPCS named dpcs_xjump. The purpose of this procedure
is to provide an early rampdown on runaway shots. This
is considered a safety measure for the lower hybrid
launcher, which is thought to be vulnerable to damage
from runaway electrons when it is in its extreme forward
position.
Basically, the action of this routine is to test the signal
on the neuts_hards input to DPCS and if this exceeds a
threshold value to jump ahead to a pre-set time in the
ramp-down part of the shot.
The routine is presently loaded in the DPCS model tree,
but has not been turned on for shot#1. The node name is
\dpcs::top.loadables.procedures:async_pros:procedure_2
The routine is activated by setting this node ON.
Behavior of the routine is governed by values in the
tree, which can be loaded using the routine
/usr/local/cmod/codes/dpcs/dpcs_load_procedure.pro
The present PCS GUI does not provide an interface to this
routine (but it soon will).
Parameters currently set are:
threshold = 1e14 n/sec (signal level which triggers a jump)
jump_to= 1.6sec (time in sequence to which to jump)
gate=[0.12,0.6] (time interval during which routine is active)
tavg=0.01 sec (effective averaging time applied to signal, to avoid
triggering on noise spikes).
| |
| Mar 7 2006 08:38:59:237AM | Steve Wolfe | Touch V_21 in seg_01 and seg_02 to force the new interface to load the new V names Load/Noclean Filling in configuration / 1-NOV-2005 12:26:36.00/ Filling in DPCS configuration /22-DEC-2004 09:58:59.00/ about to ask alcdata to copy /home/wolfe/pcs_scratch/pcs_model to /cmod/trees/models/pcs/pcs_model about to ask alcdata to copy /home/wolfe/pcs_scratch/dpcs_model to /cmod/trees/models/dpcs/dpcs_model Load at 7-Mar-2006 08:37:17.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done Ready for shot#1 | |
| Mar 7 2006 09:25:53:517AM | 1060307001 | Steve Wolfe | shot#1: No power cycle to test things out. Camac had a problem this morning, and we saw some unexplained flashes and noise during yesterday's test cycles that need to be checked. Prad foil array is going to be offline today due to a CAMAC problem. NESoX will not be getting triggered (same problem). Got gas. I don't see any gas coming from the short B-main puff, but maybe it just needs exercizing? LH timing is from 0.7 to 0.71sec. TCI feedback signal still has a 200mV offset, being corrected by baseline_sub. I think we're ready to go |
| Mar 7 2006 09:36:22:597AM | 1060307002 | Steve Wolfe | shot#2: Try for plasma. Plasma full length. nl04=5e19. EFIT job hung on cmodws23. Ran it manually. Outer gap is 7-10mm. Tiny runaway level early, < 3e12 |
| Mar 7 2006 09:50:00:893AM | 1060307003 | Steve Wolfe | shot#3: No changes. C-right is down to -165 at 10 minutes, waiting for LH LH will go at .65sec this time plasma full length Runaways bigger this time, 2e13 early. Maybe I should turn on the xjump routine? Cell access for LH to move the coupler in. |
| Mar 7 2006 10:14:30:597AM | 1060307004 | Steve Wolfe | shot#4:Turn on dpcs_xjump. Br looked positive on last shot, Bz a little negative, but no change yet. Joe has loaded the dpcs_ftae procedure into test_pros, but has not turned it on yet. LH launcher moved in 2mm. Runaway shot, and I think xjump worked. Xray signal was over 2e14. dpcs_xjump turned the plasma off, ramped down by 0.5sec Turn it back off for next shot, since the LH people can still work with runaway shots at this radius. Try to get rid of them in startup. |
| Mar 7 2006 12:17:13:490PM | 1060307004 | Steve Wolfe | On shot#4 the dpcs_xjump routine successfully ramped the plasma down in response to a high runaway (hard Xray) signal. However, the way the routine is implemented, it resulted in the dpcs_fizzle routine not double-swinging the oh's after the plasma current ramped down. This was a bad thing, because the early ramp-down left all the oh currents at negative (pre-charge direction) values at the end of the shot. The oh coax resistance was therefore very high on shot#5. The problem arises because the jump ahead sequence moves all the synchronous time switches ahead, so that the effective fizzle detector gate is also shifted, in this case moving the off time from 1.8sec to ~0.32sec. Since the plasma didn't get below the threshold current for the fizzle detector until after 0.4sec the dpcs_fizzle routine did not act. The right behavior would be to leave the switch times for the dpcs_fizzle sequence alone, so they stay locked to real time. However, this is difficult to accomplish with the present scheme. It would perhaps be possible to set things up so that the end of plasma came within the shifted fizzle gate, by extending the end of the real f.d. gate to 1.9, doing the jump to 1.5sec and ramping down faster. However, this is a rather dicey proposition, in view of the bad consequence for the oh coax resistance if it fails. The issue is that a "normal" ramp-down, lasting about 500msec after the jump still needs to activate the fizzle sequence because the oh's have not double swung. On a full length shot we don't want to activate this sequence after a successful ramp-down because by then the oh's have reversed naturally. |
| Mar 7 2006 10:32:49:597AM | 1060307005 | Steve Wolfe | shot#5:Turn off dpcs_xjump. Br0 from 0.0002 to 0 pg4 from 28ms to 32ms ic_ef4 from -1350 to -1340 Add dpcs_ftae to test_pros and turn it on for this shot. plasma full length. Still has bad runaways early, up to 3e14. EFIT job hung again, ran it manually. Got a coax high resistance warning on this shot. The dpcs_xjump routine pushed the dpcs_fizzle out too far, so it didn't double swing. Need to do it a little differnt when I turn it back on. |
| Mar 7 2006 10:52:37:207AM | 1060307006 | Steve Wolfe | shot#6: Raise pg4 from 32 to 34msec plasma full length. No runaways at all <5e11 Late breakdown, ~9msec. Leave it for next shot, probably will come back (runaways will probably come back too). |
| Mar 7 2006 11:01:03:673AM | 1060307007 | Steve Wolfe | shot#7: No pcs changes this shot. I think I probably turned off Joe's routine again. The problem with not doing the load proc in the scratch_dir is that whenever I load a new shot it overwrites the model dpcs. For next shot: open the tree in pcs_scratch and add dpcs_ftae Load it. Should work next shot |
| Mar 7 2006 11:03:56:800AM | 1060307007 | Steve Wolfe | shot#7: No pcs changes this shot. Plasma full length but runaways are back. Breakdown is back at the usual time. next shot: increase pg4 from 34 to 36 msec |
| Mar 7 2006 11:10:51:707AM | 1060307008 | Steve Wolfe | shot#8: increase pg4 from 34 to 36 msec Reload dpcs_ftae routine (again) for Joe. plasma full length hard xrays still bad. Dpcs_ftae ran that time. Cell access for lh to move the grill in some more. next shot: increase pg4 again, still trying to get rid of the runaways. |
| Mar 7 2006 11:34:02:770AM | 1060307009 | Steve Wolfe | shot#9: pg4 to 39ms plasma full length Runaways are down this time, ~1.5e12 Next shot: no pcs changes |
| Mar 7 2006 11:41:59:987AM | 1060307009 | Steve Wolfe | shot#9: We're getting a high resistance reading on TF turn 49. We will put a back porch on the TF waveform and extend the tf invert time to 3.5sec. Need a cell access to move the tf tap instrumentation |
| Mar 7 2006 11:46:45:457AM | 1060307009 | Steve Wolfe | shot#10: TF only test shot at 50kA. PLC control |
| Mar 7 2006 12:09:08:503PM | 1060307010 | Steve Wolfe | shot#10: TF-only test shot at 50kA. PLC control LH moved the launcher in for next plasma shot (which won't be until shot 11). Got a 50kA TF pulse ok. Waiting for tap data |
| Mar 7 2006 12:32:30:650PM | 1060307011 | Steve Wolfe | shot#11: Take another PLC TF-only test at 150kA Resistance is still a bit higher than the neighbors but only 10% or so. Scanner reading came down. Next shot: go for a plasma. |
| Mar 7 2006 12:43:08:210PM | 1060307012 | Steve Wolfe | shot#12: Try for plasma, only change from 9 is back porch on the TF, TF invert to 3.5sec, TF fizz del at 1000ms. PG4 still at 39msec plasma full length. No runaways (<5e11) bd a little late (7ms), but pretty good current rise. I don't see the back porch? I put it in Seg1 !*? |
| Mar 7 2006 12:57:37:570PM | 1060307013 | Steve Wolfe | shot#13: This time put the back porch in seg2 where it belongs. Raise nl04 from 6e19 to 7e19 (density has fallen a little; probably should have given it a little maintenance gas instead) plasma full length. Had an early runaway burst this time, up to 2e14. Got our back porch this time. next shot: add 2ms to pg4 again |
| Mar 7 2006 01:10:41:710PM | 1060307014 | Steve Wolfe | shot#14: pg4 form 39 to 41ms Add 30V pg3 pulse in seg2 plasma full length. Runaways are a little better, still over 2e13. Several bounces in startup, bd a little late, 7.5ms next: raise pg4 again, hope it doesn't fizzle. |
| Mar 7 2006 01:41:04:240PM | 1060307015 | Steve Wolfe | shot#15: pg4 form 41 to 43ms Program a series of steps in RCUR for a gap scan RCUR = .661 (where it was), .660,.659,.658,.657,.656 at .695-.705,.72-.735,.75-.765,.78-.795,.81-.825,.84-855 Also raised pg3 to 40V during seg2 plasma full length, big bounce in startup. Lots of runaways early Need to run the fast efit to pick up the steps. Next shot:reload shot12 |
| Mar 7 2006 01:50:02:053PM | 1060307016 | Steve Wolfe | Shot 16: Import seg2 from shot 12 raise pg4 to 45msec! Plasma full length. One bounce, runaways down but still there ~1e13. Lost the back porch, put it back for next shot. |
| Mar 7 2006 02:39:44:680PM | 1060307017 | Steve Wolfe | shot#17:Raise pg4 again from 45->47ms Cell access to move mechanical phase shifter Back to gap scan: reload shot 15 seg2. That also puts back the back porch plasma full length. No runaways. Breakdown around 7.5msec, nice current rise, no bounce. Got the gap scan. Next shot: another mechanical phase shift change |
| Mar 7 2006 03:20:17:617PM | 1060307018 | Steve Wolfe | Shot#18: No pcs changes. Fizzle. Looks like gas may have finally been too high bd time same as last shot. Fields also look the same. next shot: drop pg4 by 1ms (just to be doing something) |
| Mar 7 2006 03:32:55:100PM | 1060307019 | Steve Wolfe | Shot#19: pg4 from 47ms Plasma full length. No runaways. No bounces, still a bit late in bd. Next: another cell access to change mech. phase shifter. I'm going to think about tweaking Br |
| Mar 7 2006 03:44:58:570PM | 1060307019 | Steve Wolfe | Shot#19: There is a density rise after the LH pulse starting at .83sec. Before that the gas valve is puffing full on and the density is not rising. It looks like some kind of a detachment. Also corresponds to the end of the gap scan. |
| Mar 7 2006 03:50:48:367PM | 1060307019 | Steve Wolfe | Shot#19: Outer strike point is moving up onto the nose at about the time of the density rise. I don't want to change the equilibrium out from under John's scan, but I may need to if we're losing density control. I don't understand how it is taking all that gas and not getting the density above 5e19/m2 |
| Mar 7 2006 04:01:18:900PM | 1060307020 | Steve Wolfe | Shot#20: No pcs changes this time, see what happens. What happens is a fizzle. Next shot: drop pg4, drop Bz |
| Mar 7 2006 04:22:48:820PM | 1060307021 | Steve Wolfe | Shot#21: Pg4 from 46 to 44ms, ic_ef4 from -1340 to -1350 add a 100V pg3 puff from 100 to 150ms, drop maint level to 30V plasma full length But we've got data system problems. No runaways. Very slow current rise this time, I think it could stand lower pg4 again. Still getting the density rise after .83sec I think the B-side main valve isn't actually opening until .8sec. The plenum pressure seems not to change until then. |
| Mar 7 2006 04:42:10:350PM | 1060307022 | Steve Wolfe | Shot#22: pg4 from 44 to 40ms. Extend 100V on pg3 to .25sec to try to get it open. No TF. |
| Mar 7 2006 04:57:12:040PM | 1060307023 | Steve Wolfe | Shot#23: pg4 from 44 to 40ms. Extend 100V on pg3 to .25sec to try to get it open. NO Power shot - RF DAQ hung in INIT |
| Mar 7 2006 05:12:15:273PM | 1060307024 | Steve Wolfe | Shot#24: pg4 from 44 to 40ms. Extend 100V on pg3 to .25sec to try to get it open. Another data system problem- NO POWER SHOT, no data. |
| Engineering Operator Comments | ||||
| Shot | Time | Type | Status | Comment |
| 1 | 09:11:57:970AM | Test | Ok | Cycle Test Shot |
| 2 | 09:26:52:643AM | Plasma | Ok | |
| 3 | 09:44:32:050AM | Plasma | Ok | |
| 4 | 10:09:43:347AM | Plasma | Ok | |
| 5 | 10:22:57:360AM | Plasma | Ok | |
| 6 | 10:40:37:143AM | Plasma | Ok | |
| 7 | 10:53:22:813AM | Plasma | Ok | |
| 8 | 11:05:54:423AM | Plasma | Ok | |
| 9 | 11:26:44:487AM | Plasma | Ok | |
| 10 | 12:03:44:520PM | Test | Ok | TF 50 KA Test For Mag turn 49 |
| 11 | 12:24:06:673PM | Test | Ok | 150KA TF Magnet Test |
| 12 | 12:37:43:850PM | Plasma | Ok | |
| 13 | 12:53:30:663PM | Plasma | Ok | |
| 14 | 01:06:18:880PM | Plasma | Ok | |
| 15 | 01:30:05:553PM | Plasma | Ok | |
| 16 | 01:45:27:367PM | Plasma | Ok | |
| 17 | 02:34:33:133PM | Plasma | Ok | |
| 18 | 03:15:47:663PM | Plasma | Ok | |
| 19 | 03:28:24:117PM | Plasma | Ok | |
| 20 | 03:58:35:507PM | Plasma | Ok | |
| 21 | 04:13:03:630PM | Plasma | Ok | |
| 22 | 04:39:46:773PM | Plasma | Bad | TF did not fire |
| 23 | 04:51:06:837PM | Test | Bad | |
| 24 | 05:04:51:600PM | Test | Bad | |