Alcator C-Mod Run 1060324 Information

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Miniproposals
Miniproposal:409
Date Filed: 1/19/2005
Title:Phase Space of the Scrape-off-Layer Plasma
First Author:Brian Labombard
Session Leader:Brian Labombard (shots 1-33)

Operators
Session leader(s):Brian Labombard
Physics operator(s):Steve Wolfe
Engineering operator(s):Andy Pfeiffer,Sam Pierson,Gary Dekow

Engineering Operator Run Comment
automatically entered by signon - please replace with real comment

Session Leader Plans
Entered: Mar 23 2006 05:47:24:330PM
Author: Brian Labombard
Run Plan for 1060324

MP#409 "SOL Phase space studies"

Overall Goal
Map out the 'phase space' of the SOL plasma, i.e. the relationships between
the 'transport state' (profile shapes, gradients, cross-field fluxes, advection
velocities, turbulence characteristics) and theory-based 'control parameters'
(local collisionality, magnetic field strengths, parallel connection length,...)
that may determine that state.

Today's Goals
The focus today is to continue the attempt to get some data at Ip=1.1 MA and
Bt=5.4 Tesla in LSN and USN equilibria. If there is time, we will also take data at Ip=0.8 MA
and Bt=4.0 Tesla. First we will start out with a few 0.8 MA shots to make contact with previous data.

Notes
- Set integration time on Xybion to 1 ms
- 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
Load from shot#1060316006. This shot ran on segment#3. It was a USN discharge
with Ip=0.8 MA, Bt= 5.4 tesla, NL04 = 0.79e20. Note: segment#2 has
a LSN program (used last time on 1060316003) that we will also use.

ASP, FSP, 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

Reload from 1060316006 (segment#3 active)
Ip= 0.8 MA, set NL04 = 0.6
1,2 USN optimize probe insertion
Go to segment#2 (last run as 1060316003) set NL04= 0.6
3,4 LSN optimize probe insertion

Reload shot#1060316016 (segment#3 active)
Ip= 1.1 MA, set NL04 = 0.5
5,6 USN optimize probe insertion
Go to segment#2 (last run as shot#1060316014) set NL04= 0.5
7,8 LSN optimize probe insertion

NL04 = 0.8
9,10 USN
11,12 LSN

NL04 = 1.1
13,14 LSN
15,16 USN

NL04 = 1.4
17,18 USN
19,20 LSN

NL04 = 1.7
17,18 USN
19,20 LSN

If time remains...
Change to Bt=4T, Ip= 0.8 MA and continue LSN/USN sequence
reload 1050602008
NL04 = 0.6

NL04 = 0.4

NL04 = 0.8

NL04 = 1.0

NL04 = 1.2

+++++++++++

Physics Operators Plans
Entered: Mar 23 2006 05:48:33:783PM
Author: Steve Wolfe
Physop Run Plan and Engineering Setup for Friday, 24-Mar-2006
PO: wolfe
MP#409: SOL phase space
SL: LaBombard

Overnight ECDC in D2, and bake at 60 C.

Run begins at 09:00 and ends at 17:00

Power systems as on 1060316006 (800kA USN, 5.4T)
Except: TF Invert time= 1.6 sec
TF Fizzle Delay= 600 msec
OH1 and OH2 Fizzle delay = 300msec

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 30 psi D2 Hybrid enabled (PG3)
fill NINJA with 10psi D2 enabled


Enable the following gate valves, assuming no vacuum problems:
ECE, VUV, ZboloShutter

Torvac setup: Gate valves open

ICRF: NO ICRF today. We will be running MP#409 after all.   

Physop run plan:
-----------------

If we need to change the experiment to MP#409, then load segs 2 and 3
from 1060316006 and proceed as in SL Plan:
Reload from 1060316006 (segment#3 active)
Ip= 0.8 MA, set NL04 = 0.6
1,2  USN optimize probe insertion
Go to segment#2 (last run as 1060316003) set NL04= 0.6
3,4  LSN optimize probe insertion

Reload shot#1060316016 (segment#3 active)
Ip= 1.1 MA, set NL04 = 0.5
5,6  USN optimize probe insertion
Go to segment#2 (last run as shot#1060316014) set NL04= 0.5
7,8  LSN optimize probe insertion

NL04 = 0.8
9,10  USN
11,12 LSN

NL04 = 1.1
13,14 LSN
15,16 USN

NL04 = 1.4
17,18 USN
19,20 LSN

NL04 = 1.7
17,18 USN
19,20 LSN

If time remains...
Change to Bt=4T, Ip= 0.8 MA and continue LSN/USN sequence
reload 1050602008
NL04 = 0.6

NL04 = 0.4

NL04 = 0.8

NL04 = 1.0

NL04 = 1.2


Session Leader Summaries
Entered: Mar 24 2006 10:19:54:933PM
Author: Brian Labombard
Run Summary for 1060324

MP#409 "SOL Phase space studies"
___________________________________________________________________________________
Goal:
The goal today was to continue to gather profile and flow data in 1.1 MA, 5.4 tesla
ohmic discharges in LSN and USN at different densities. In particular, we wanted to
see if the pressure profiles near the separatrix follow an Ip^2 scaling, with a systematic
variation with LSN versus USN - this has been seen at lower currents. Also, we desired
to map-out plasma flow behavior in the SOL and core at this parameter range.
Last time we attempted to collect this set of data (1060316), we were not very successful
due to run delays as well as some intermittent breakdown 'arcs' on the A-port scanning probe.
Since that time the A-port probe was repaired. Also, the "west" electrode on the F-port probe,
which was shorting out last time, was found to be in much better shape today.

Result:
This was a great run. We managed to gather all the data we needed in matched LSN and
USN discharges for a good range of plasma densities (NL04=0.55 to 1.7e20) at 1.1 MA plasma
current. The A-port probe functioned very well, yielding density, temperature and flow
information. The inner wall probe also worked well and was poked near to the
separatrix all day. The only down side was that the F-port scanning probe decided not
to scan at all after shot#5. The problem seems to be a bad drive transistor for the 4-way
solenoid valve that sends air pressure to the pneumatic cylinder. This fix will
require a maintenance day. Fortunately, we can use the A-port probe data for the key
analysis, although flow information from the F-probe would have been valuable.
Jim Terry got some good fast-diode data today from most all shots. John Rice also
reported that he got some good central toroidal rotation data in LSN/USN. It appears
that at 1.1 MA, rotation in LSN is the same as USN for the same density discharge.
In both cases, the rotation is seen to be a strong function of density. The parallel
flows near the separatrix (from A-port probe) also look like they are of similar magnitude
in USN and LSN, although they are different farther out into the SOL. Flows on the inner
wall still reverse (roughly) in LSN compared to USN. Flows near the separatrix at the outer
midplane also exhibit a strong dependence on LN04 (decreasing with density), perhaps
explaining John's observations. It will be interesting to compare the separatrix/core
plasma flow values directly.
___________________________________________________________________________________
Quick shot log

Ip=0.8MA, Bt=5.4T
1 - USN, Ip=0.8MA, NL04= 0.56 ASP(+5), FSP(0) NSEW-sweep, ISP
2 - USN, Ip=0.8MA, NL04= 0.61 ASP(+11), FSP(+9), ISP - great targeting
3 - LSN, Ip=0.8MA, NL04= 0.54 ASP(+9)too deep West probe card problem, FSP(+6), ISP
4 - fizzle
5 - LSN, Ip=0.8MA, NL04= 0.56 ASP(+8)-excellent, FSP(+7)-excellent, ISP

Ip=1.1MA, Bt=5.4T
6 - USN, Ip=1.1MA, ASP(+11), FSP(+5), ISP
disrupted early, lots of runaways, FSP does not seem to be accepting triggers.
7 - USN, Ip=1.1MA, NL04= 0.3 ASP(+11), FSP(+5), ISP - FSP not triggering- problem with solenoid valve drive?
8 - USN, Ip=1.1MA, ASP(+13), FSP(+5), ISP - FSP not triggering. Capacitor voltage does not droop. Looks like drive transistor is dead.
disrupted at .55s
9 - USN, Ip=1.1MA, NL04= 0.4 ASP(+13)-good, ISP-good - FSP not triggering- solenoid drive transistor is dead?
10- USN, Ip=1.1MA, NL04= 0.68 ASP(+13)-could be deeper, ISP-good - FSP not triggering- solenoid drive transistor is dead?
11- USN, Ip=1.1MA, NL04= 0.68 ASP(+15)-excellent, ISP-good - FSP not triggering
12- LSN, Ip=1.1MA, NL04= 0.8 ASP(+11)-too deep, ISP-good - FSP not triggering
13- LSN, Ip=1.1MA, NL04= 0.78 ASP(+10)-good, ISP-good - FSP not triggering
14- LSN, Ip=1.1MA, NL04= 0.62 ASP(+10)-excellent, ISP-good - FSP not triggering
15- LSN, Ip=1.1MA, NL04= 0.66 ASP(+10)-great, ISP-good - FSP not triggering
16- LSN, Ip=1.1MA, NL04= 1.05 ASP(+9)-excellent, ISP-good - FSP not triggering
17- USN, Ip=1.1MA, NL04= 1.0 ASP(+15)-excellent, ISP-good - FSP not triggering
18- fizzle
19- USN, Ip=1.1MA, NL04=1.05-1.3 ASP(+15)-good, ISP-good - FSP not triggering
20- fizzle
21- USN, Ip=1.1MA, NL04=1.7(MARFE),1.2,1.4 ASP(+15)-excellent, ISP-good - FSP not triggering
22- fizzle
23- LSN, Ip=1.1MA, NL04=1.55-1.68(MARFE) ASP(+9)-could be deeper, ISP-good - FSP not triggering
24- fizzle
25- LSN, Ip=1.1MA, NL04=1.1-1.35 ASP(+10)-a little deep, ISP-good - FSP not triggering
26- LSN, Ip=1.1MA, NL04=1.2-1.35 ASP(+9)-good, ISP-good - FSP not triggering
27- early disruption
28- LSN, Ip=1.1MA, NL04=0.9 ASP(+9)-excellent, ISP-good - FSP not triggering
29- USN, Ip=1.1MA, NL04=0.83-0.85 ASP(+15)-super, ISP-good - FSP not triggering
30- USN, Ip=1.1MA, NL04=0.63 ASP(+15)-great, ISP-good - FSP not triggering
31- USN, Ip=1.1MA, NL04=0.63-0.58 ASP(+15)-great, ISP-good - FSP not triggering
32- LSN, Ip=1.1MA, NL04=0.54 ASP(+9)-a little deep, ISP-good - FSP not triggering
33- LSN, Ip=1.1MA, NL04=0.62-0.66 ASP(+8)-excellent data, ISP-good - FSP not triggering

Physics Operator Summaries
Entered: Mar 24 2006 06:15:50:167PM
Author: Steve Wolfe
Physics Operator summary for Friday, 24-Mar-2006

MP#409 SOL phase space
SL: LaBombard

An interesting and successful run. We got through the majority
of the SL run plan, up to NL04~1.4e20 in both upper and lower
null at 1.1MA, then went back and picked up some intermediate 
points on the scan. Higher density did not seem to be accessible in the
upper null configuration due to marfiness.  Brian and JR both 
reported getting good (and some unexpected) data. Brian had good data 
from the ASP and ISP all day. The FSP drive failed fairly early in the
run, and he wasn't able to fix it on the fly, but didn't seem too 
unhappy; at least he doesn't seem to need to re-do these cases 
because of the lack of FSP data. 

From the physop point of view, we established that use of 
static fill for breakdown is no worse than using pre-puff,
and may possibly have been helpful in avoiding duds. At least there 
were no duds while using static fill (shots#5-33) and no more fizzles
than recent "usual", maybe fewer though the statistics aren't there
yet. We started off using a "normal" pg4 pre-puff (22ms) for shots 1-4,
and after we hit the first dud on shot #4 we changed over to the
static fill at 1.5e-5 target. Shot #5 ran, with the only startup
bounce of the day and substantial runaways, then shot 6 had a 
startup injection and huge runaways, very like shot 1060323034. 
A possibly relevant point is that for all shots after that (#7-33)
the sparker began to show increased current above its usual 200uA,
starting about the time it reached max voltage, around -.5sec. 
Breakdown times with the static fill initially were slightly late,
though not as late as #1-3 with the pg4 puff, but on shot 6 and after
they were earlier, around 5ms or slightly before. Sometime around 
shot 16 or so the breakdown started to creep later, and the burnout
light developed a lump, similar to what
happened yesterday, and shot 18 was a fizzle. It is probably worth
noting that at this point in the run we were running rather high 
densities and getting end of shot disruptions. Shots 18-25 were
a classic fizzle/disruption/fizzle/disruption sequence. After the 
disruption on #25 we lowered the fill target from 1.5e-5 to 1.3e-5 and
had successful startups the rest of the day (#26-33); to be fair 
there weren't any more 1.1MA disruptions in that series either, though 
there was one pre-flattop disruption on #27. 

The other interesting physop point noted today is that there seems
to be a slight discrepancy between the TCI feedback signal and the
NL04 value reported by the usual trace. This resulted in the gas turning
off on several shots with low target density (5e19) even when the
nominal nl04 value was as low as 2-3e19. Irby should investigate
this effect. It may be an offset problem on the auto-zeroing circuit,
or something about the way I'm doing the baseline subtraction in 
DPCS. 

Generally, the machine ran well today. We are still having funny
TC readings from various TF legs; today E-left seemed to back in 
the 'bad' reading barrel, but Irby ok'd bypassing it, so there were
only a few short delays for EF3 and OH cooling. There were
some disruptions, mostly in the upper null cases at high density.
Some of these were injections, and some may have been power supply
railing (current and/or voltage). Early in the day we were getting
locked modes on the low density high current cases, but then I 
realized that the C-integrator gate was not turning on until
after .5sec so the B21_PROJ feedback couldn't work until then. 
This was fixed at shot 14. When we went back to low density
later in the run we didn't seem to get locked modes anymore, so 
that may have worked. Two shots had early runaways and one low
density case (#7) developed runaways in flattop.  

There was one cell access to reseat a TC connector from the EF1L
coil, and a couple of power room accesses to check on a multiple
SCR not conducting error (spurious) and to reset things after a
crowbar following a disruption.  There were also a couple of cell
accesses early for camera resetting and to check on the F-side
probe, which failed early and could not be revived today.  

Scorecard:
----------

      Tests    0
      Duds     1
      Fizzles  4
      Plasmas 28
     ======== ==
      Shots   33

Session Leader Comments
Mar 24 2006 09:13:51:520AM1060324001Brian LabombardShot 1 USN, NL04 =0.54, 0.8MA, 5.4T, ASP,FSP,ISP scanning at .65, .85, 1.05 s
all probe signals look real clean today!

next: Repeat with probes at separatrix
Mar 24 2006 09:23:52:193AM1060324002Brian LabombardShot 2 USN, NL04 =0.61, 0.8MA, 5.4T, ASP,FSP,ISP scanning at .65, .85, 1.05 s
ASP - good
FSP - good
ISP - good

next: Go to LSN
Mar 24 2006 09:51:17:037AM1060324003Brian LabombardShot 3 LSN, NL04 =0.54, 0.8MA, 5.4T, ASP,FSP,ISP scanning at .65, .85, 1.05 s
ASP - a bit deep, problem with West probe card, looks like wrong load resistor! - I re-seated it.
FSP - could be deeper
ISP - good

next: repeat
Mar 24 2006 10:15:52:957AM1060324005Brian LabombardShot 5 LSN, NL04 =0.56, 0.8MA, 5.4T, ASP,FSP,ISP scanning at .65, .85, 1.05 s
ASP - excellent, probe card problem is fixed
FSP - excellent
ISP - good

next: go to 1.1MA USN
Mar 24 2006 11:07:32:613AM1060324007Brian LabombardShot 7 USN, NL04 =0.3, 1.1MA, 5.4T, ASP,FSP,ISP scanning at .65, .85, 1.05 s
ASP - could be deeper
FSP - not scanning. Looks like solenoid valve is not getting powered, although LED lights.
ISP - good

next: Repeat
Mar 24 2006 11:19:45:630AM1060324008Brian LabombardShot 8 USN, disrupts early, 1.1MA, 5.4T, ASP,FSP,ISP scanning at .65, .85, 1.05 s
ASP -
FSP - not scanning. Capacitor voltage is flat. Looks like solenoid drive transistor is dead.
ISP -

next: Repeat
Mar 24 2006 11:33:29:787AM1060324009Brian LabombardShot 9 USN, LN04=0.4, 1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - good
ISP - good

next: go to NL04=0.8
Mar 24 2006 11:56:24:817AM1060324010Brian LabombardShot 10 USN, LN04=0.7, 1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - could be deeper
ISP - good

next: repeat with ASP deeper
Mar 24 2006 12:08:29:537PM1060324011Brian LabombardShot 11 USN, LN04=0.7, 1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - great
ISP - good

next: go to LSN at LN04=0.7
Mar 24 2006 12:29:44:957PM1060324012Brian LabombardShot 12 LSN, LN04=0.8, 1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - too deep!
ISP - good

next: Repeat
Mar 24 2006 12:35:49:207PM1060324013Brian LabombardShot 13 LSN, LN04=0.78, 1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - good
ISP - good

next: go to nl04=0.5
Mar 24 2006 12:53:55:257PM1060324014Brian LabombardShot 14 LSN, LN04=0.62, 1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - excellent data
ISP - good

next: try for lower density
Mar 24 2006 01:10:27:130PM1060324015Brian LabombardShot 15 LSN, LN04=0.66, 1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - excellent
ISP - good

next: go to NL04=1.1
Mar 24 2006 01:25:56:910PM1060324016Brian LabombardShot 16 LSN, LN04=1.05, 1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - excellent
ISP - good

next: go to USN at NL04=1.1
Mar 24 2006 01:38:56:990PM1060324017Brian LabombardShot 17 USN, LN04=1.0, 1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - excellent
ISP - good

next: go to NL04=1.4
Mar 24 2006 02:05:43:727PM1060324019Brian LabombardShot 19 USN, LN04=1.05-1.3, 1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - good
ISP - good

next: try to get NL04=1.4 early, ramping up to higher value, if necessary
Mar 24 2006 02:36:23:183PM1060324021Brian LabombardShot 21 USN, LN04=1.7(MARFE),1.2,1.4, Ip=1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - good
ISP - good

next: go to LSN, NL04=1.4
Mar 24 2006 03:01:15:387PM1060324023Brian LabombardShot 23 LSN, LN04=1.55- 1.68, Ip=1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - could be deeper
ISP - Marfe - plasma density drops on inner wall

next: try to hold NL04=1.4
Mar 24 2006 03:28:04:247PM1060324025Brian LabombardShot 25 LSN, LN04=1.1-1.35, Ip=1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - too deep
ISP -ok

next: repeat
Mar 24 2006 03:37:03:073PM1060324026Brian LabombardShot 26 LSN, LN04=1.2-1.35, Ip=1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP - good
ISP -ok

next: go to NL04=0.9
Mar 24 2006 04:03:44:310PM1060324028Brian LabombardShot 28 LSN, LN04=0.9, Ip=1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP -excellent data
ISP -ok

next: go to USN
Mar 24 2006 04:18:35:653PM1060324029Brian LabombardShot 29 USN, LN04=0.83-0.85, Ip=1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP -super
ISP -ok

next: go to NL04=0.5
Mar 24 2006 04:33:28:153PM1060324030Brian LabombardShot 30 USN, LN04=0.63, Ip=1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP -good
ISP -ok

next: repeat, looking for NL04=0.5
Mar 24 2006 04:45:13:760PM1060324031Brian LabombardShot 31 USN, LN04=0.63-0.58, Ip=1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP -good
ISP -ok

next: Go to LSN at NL04=0.5
Mar 24 2006 05:07:24:950PM1060324032Brian LabombardShot 32 LSN, LN04=0.54, Ip=1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP -too deep on first two scans
ISP -ok

next: repeat
Mar 24 2006 05:09:56:747PM1060324033Brian LabombardShot 33 LSN, LN04=0.62-0.66, Ip=1.1MA, 5.4T, ASP,ISP scanning at .65, .85, 1.05 s
ASP -excellent data
ISP -ok

end of run

Physics Operator Comments
Mar 24 2006 07:10:34:770AMSteve Wolfe
Setting up for 1060324
Using development version of PCS
Import seg2 from 1060316006
Import seg3 from 1060316006
Seg2 off/Seg3 on
  In seg3:
   Load wire 9 from seg4 (B21_Proj). 
     And it failed? I may have found a bug in the new gui?
     No, I hit load_wave instead of load_wire and it did it, 
      I think. Now do what I wanted to do.
   Zero wires 10-12 (were zcur,strkin,strkpsi)
   Ref9-12 to '10'
   Build Segment - no errors
  In seg2: 
   Load wire 9 from seg3 (B21_PROJ)
   Build_segment
Checking seg1 (from 1060323034):
  Br0=0
  IC_Ef4=-1350
  Rcur offset=1600
  pg4=22ms
  Note: in seg1 set all diborane piezo points to zero (some tiny 
    non-zero values were left around from last week).
Load/Clean
 Load at 24-Mar-2006 07:09:51.00
Open tree /home/wolfe/pcs_scratch      -1
Open tree done

Mar 24 2006 08:48:15:363AM1060324001Steve Wolfe
For shot#1: Enable B-side lower (Ar/Ne 40msec puff)
as authorized by SL.

Mar 24 2006 09:11:22:397AM1060324001Steve Wolfe
Shot#1: Plasma full length. 
late breakdown, around 9msec; Bz a little negative
p0 is only .06mTorr. Plenum is only 6.0psi today, was 6.5yesterday
Density rises after 1sec due to NINJA puff
Brian says targeting is ok.

Next shot: EF4 5A more positive

Mar 24 2006 09:26:52:443AM1060324002Steve Wolfe
Shot#2:  EF4 from -1350 to -1345
IGT at check 9.5e-7
plasma to 1.8sec. 
breakdown even later, 11msec!
p0=.063, Bz still too negative

next shot: 10A more on EF4

Mar 24 2006 09:33:56:630AM1060324003Steve Wolfe
Shot#3:  EF4 from -1345 to -1335
Change to seg2 for LSN case. 
Notice that I had a waveform on the Acoil V, get rid of it
since I've loaded B21_PROJ feedback on wire9. 
This one has 50ms Ar puff; leave it. 
plasma full length. Looks lower null to me.
Still a late breakdown - 9msec
p0 is up to ~.065
Cell access for JT

next shot: Br0 0.2mT positive

Mar 24 2006 09:56:05:910AM1060324004Steve Wolfe
Shot#4:  Br0 from 0 to  +0.0002
dud. Fields look the same as on 3, can't tell that
I changed Br. p0 is .063. Looks like the late breakdown
finally got me. 

Try the static fill.

Mar 24 2006 10:08:08:863AM1060324005Steve Wolfe
Shot#5: Static fill: Disable B-top hybrid, enable B-top fill
set fill target=1.5e-5. No other changes. 
IGT before INIT=5.4e-7
IGT in CHECK=1.4e-5
plasma, runaways early. 
big bounce in startup, almost lost it,
but breakdown was earlier, 6.2msec
P0=.065 Torr.

Next shot: Go to 1.1MA shot.

Mar 24 2006 10:27:14:397AM1060324006Steve Wolfe
Shot#6:  Go to 1.1MA shot 
Import seg3 from 1060316016
Import seg2 from 1060316016
Seg 3 on seg2 off
In seg3: load wire 9 from seg4 (B21_PROJ)
ref to '10'
NL04 from 8.5e19 to 5e19
Zero Acoil, remove PG3 puff 
Haven't zero'd the wire 10-12 yet, but they're off.
No startup changes
IGT in CHECK=1.4e-5
Horrendous runaways, early disruption at 0.5sec
Big early injection at 33msec, looks a lot like Shot#34 yesterday.
I don't think the runaways start until after the injection (watch
out for the in-tree smoothing on \neuts_hards)
Breakdown was at 5.5msec, good current rise until it gets zapped.
p0=0.066mTorr

Gary needs a cell access to check a TC on an EFcoil

Mar 24 2006 10:58:07:113AM1060324007Steve Wolfe
Shot#7: Load PCS with wires10-12 zero'd, seg2 set up for 
B21_PROJ. No real changes from 6, still in seg3 trying for  1.1MA USN.
Time in recool=26minutes
ITG before INIT=5.0e-7
ITG at CHECK=1.4e-5
plasma to 1.65sec, runaways after 0.5sec
Got nl04=3e19 instead of 5e19, maybe it needs a little 
maintenance gas after all. 
Looks like a locked mode at 1.2sec, maybe earlier as well

fsp didn't fire. Brian is checking in the cell.

Mar 24 2006 11:20:07:333AM1060324008Steve Wolfe
Shot#8: Put some maint pg3 in seg3 
F-probe drive is apparently dead. Will continue without it.
ITG before INIT=7.1e-7
ITG in CHECK=1.5e-5
Early disruption at 0.6sec, density came way down again. 
Feedback thinks the density is too high, but it is less
than drawn waveform. Actually it isn't early.

Mar 24 2006 11:33:07:380AM1060324009Steve Wolfe
Shot#9: Redraw nl04 to 6e19
Increase maint level to 25V
Disruption, later this time 1.35sec
Gas is still getting turned off before .45 sec
Maybe the gain is too high?
Startup looks good (now I've jinxed it!)
No runaways this time. Not obvious why it disrupted. 

next: raise nl04 to 8e19

Mar 24 2006 11:49:15:723AM1060324010Steve Wolfe
Shot#10: Raise nl04 to 8e19, leave pg3 alone.
No startup changes. 
ITG into INIT=8.7e-7 
ITG in CHECK=1.5e-5
plasma to 1.68sec, nl04=0.7e20
no runaways. Ef1L rails late, probably not a problem
I think we're getting a locked mode at 0.45sec or so,
when the density does its early drop.

Mar 24 2006 12:04:07:550PM1060324011Steve Wolfe
Shot#11: Increase early seg3 PG3 program to try to prevent
the density drop. Decrease early nl04 gain. Maybe I shouldn't
have asked for 30psi instead of 40psi in the b-main plenum?

Increase Ar puff from 40->50ms 
ITG pre-INIT=7.9e-7
ITG in CHECK=1.5e-5
plasma full length, density is still only 7e19 before NINJA puff
but I don't think we had a locked mode this time.
P0=.07mTorr, startup looks good

Next: Go to lower null at this density

Mar 24 2006 12:28:50:897PM1060324012Steve Wolfe
Shot#12: Go to lower null at this density
Copy NL04 and PG3 waveforms to seg2, load gains for nl04 
from seg3 to seg2
Seg3 off/Seg2 on.
plasma full length, no runaways, startup ok, bd at 4.9ms may be 
getting too early
nl04=7.8e19 before NINJA puff. No locked mode, I don't think,
but the sawteeth get smaller around 1.1sec during the NINJA puff

next: re-do this one with NL04 program to 7e19

Mar 24 2006 12:33:27:177PM1060324013Steve Wolfe
Shot#13:re-do 12 but with NL04 program to 7e19
plasma full length (1.78sec), nl04 still around 7.5e19
and gas is off after .45sec; walls are loading up.
Injection at 0.92sec

Next: drop nl04 to 0.5e20

Mar 24 2006 12:52:00:130PM1060324014Steve Wolfe
Shot#14:drop nl04 to 0.5e20
Notice that the Integrator C gate isn't
on until 0.5sec; move the start to .21sec in seg2
so the B21_Proj control is effective earlier (was only
seeing the P gain until then)
Make the same change in seg3 for when we go back to it.
ITG pre-INIT=1.0e-6
plasma to 1.86sec
NL04=6e19 until NINJA; gas is off after 0.2sec. If Brian
wants it lower he should install the cryopump (or wait for
a couple of shots). 
Acoil turns on when it should.

next shot: repeat, see if density is lower

Mar 24 2006 01:06:23:143PM1060324015Steve Wolfe
Shot#15:repeat, see if density is lower
plasma full length. nl04=6.5e19

next: nl04 to 1.1e20

Mar 24 2006 01:22:28:473PM1060324016Steve Wolfe
Shot#16: nl04 to 1.1e20, still lower null
plasma to 1.7sec, nl04=1.0 to 1.1e20

next: go to upper null at this density

Mar 24 2006 01:35:11:113PM1060324017Steve Wolfe
Shot#17:  go to upper null at this density
copy nl04 trace from seg2 to seg3.
seg2 off/seg3 on
Change segment titles to read "1.1MA ..." instead of "0.8MA..."
plasma to 1.75sec. nl04=1.0e20
breakdown a little later,5.6ms, and starting to get a little bit of
a lump in the burnout curve. CIII is growing some too, now up to 0.01
EF1L is railing at about 1.3sec

next: raise NL04 to 1.4e20

Mar 24 2006 01:44:05:100PM1060324018Steve Wolfe
Shot#18:  raise NL04 to 1.4e20 and raise pg3 to ~50V
Increase OH1, OH2 current limits to 30kA (from 26 and 27)
Leave startup alone, although it looks like it may be trending
toward a fizzle. 
Fizzle. I called it, now I have to figure out what to do about it.

Mar 24 2006 02:03:41:260PM1060324019Steve Wolfe
Shot#19: Let's pretend it's fields. Drop Br0 from .0002 to 0
and IC_EF4 from -1335 to -1345. I don't expect this to help,
but we'll give it a try before dropping the fill. 
raise NL04 to 1.4e20 and raise pg3 to ~50V
Increase OH1, OH2 current limits to 30kA (from 26 and 27)

Plasma to 1.52sec. Maybe it really was fields. Or waiting.
Breakdown is back before 5ms and lump is gone. 
Big marfe during the first half-second. nl04 not exactly flat,
but close to target. OH1 and EF1L are railing by the end of shot.
Could increase the OH1 limit if we're going to raise NL.

next shot: try to flatten out the density at 1.4-1.5

Mar 24 2006 02:14:34:700PM1060324020Steve Wolfe
Shot#20: Increase seg3 pg3 to 70V thru 1sec to try to 
get density up faster again, after marfe
Increase OH1 limit to 35kA to eliminate late rail. 
Another fizzle. Seems just like yesterday.
breakdown at 5.8msec, slow burnout. 
Could be the disruption too. 

Just go again, no startup changes.

Mar 24 2006 02:27:50:010PM1060324021Steve Wolfe
Shot#21:  no startup changes, still trying for 1.4e20 earlier
in pulse.
plasma to 1.52sec again, very similar to 19 except the marfe
lasts longer. 
breakdown at 5.8msec, no lump.

next shot: back to lower null 1.4e20

Mar 24 2006 02:45:09:433PM1060324022Steve Wolfe
Shot#22:  back to lower null 1.4e20
Copy nl04 and pg3 traces from seg3 to seg2
seg3 off/seg2 on
IC_ef4 from -1345 to -1350
IGT pre-INIT=1.3e-6
Fizzle. Bd at 5ms, CIII up to .012W/cm2/sr. Very little current.
Should go next time. If it doesn't, then drop the fill to 1.3e-5

Mar 24 2006 02:59:26:793PM1060324023Steve Wolfe
Shot#23: No changes 
looking for lower null 1.4e20
plasma disrupts at 1.25s; Marfing throughout
Ended up at 1.7e20, I don't need the extra pg3 with lower null.
Gas was mostly off after 0.48sec anyway. EF1U is already 
railed at 0.9sec. Also getting a big thrash at Ip gain switch 
at .65sec.
Breakdown was late 7.1ms

Mar 24 2006 03:13:34:560PM1060324024Steve Wolfe
Shot#24: Slow down nl04 rise, reduce early pg3 in seg2
No startup changes, expect a fizzle.
and got one. Breakdown's back at 5.9ms though; almost made it. 

next: try again. If we get another disruption, then drop 
the fill for the following shot. 

Neuts/hards signal is showing noise spikes at 2e12 level 
at late times, out to 1.3sec. Power supply pickup? I don't 
see it on the dpcs input_84; maybe it's just on the camac?

Mar 24 2006 03:25:57:730PM1060324025Steve Wolfe
Shot#25: No change to previous setup-
Slow down nl04 rise, reduce early pg3 in seg2
plasma to 1.42sec. marfe much reduced, 1.35e20
lumpy startup, hesitated and almost fizzled again. 

next shot: repeat

Mar 24 2006 03:35:05:637PM1060324026Steve Wolfe
Shot#26: Drop fill to 1.3e-5 from 1.5e-5 try to avoid the post-
disruption fizzle.
Otherwise, repeat.
plasma to 1.68sec. nl04=1.35e20
breakdown at 5.0msec, maybe still a little slower
P0=.061mTorr, no lumps. 

next: nl04=0.9e20 lower null

Mar 24 2006 03:49:54:073PM1060324027Steve Wolfe
Shot#27:nl04=0.9e20 lower null. No startup changes.
plasma to 0.35sec. Breaker pulled after the disruption.
Looks like an injection starting at 0.337sec, shortly after crossover.

next: try again.

Mar 24 2006 03:59:13:713PM1060324028Steve Wolfe
Shot#28:nl04=0.9e20 lower null. No startup changes.
plasma to 1.75sec. NL04=0.9e20 as requested.

next: same density, upper null

Mar 24 2006 04:15:28:027PM1060324029Steve Wolfe
Shot#29: Copy nl04, pg3 from seg2 to seg3
seg2 off/seg3 on
plasma to 1.84sec. nl04=.85e20 until injection at 1.25sec

next shot: try again to get 0.5e20 in USN

Mar 24 2006 04:31:25:543PM1060324030Steve Wolfe
Shot#30:try again to get 0.5e20 in USN
plasma full length, density down to 5.7e19 at last
scan. 
next shot: repeat and see if it drops on down

Mar 24 2006 04:41:16:903PM1060324031Steve Wolfe
Shot#31:repeat and see if it drops on down
plasma full length, nl04 down to 3e19. 

next shot: lower null aim for 0.5e20

Mar 24 2006 04:55:48:777PM1060324032Steve Wolfe
Shot#32: lower null aim for 0.5e20
seg3 off/seg2 on
plasma full length. nl04 = 5.5e19.

next: repeat and re-target probe

Mar 24 2006 05:12:15:857PM1060324033Steve Wolfe
Shot#33: raise target nl04 to 7e19; there seems to be a
discrepancy between the feedback signal and the nl04 analyzed
value, and the feedback is claiming density is too high and
turning off the valve. That's why it dropped below
the program on shot 31, I think. 
plasma to 1.8sec. nl04=6.2e19. Feedback still think's the
density is too high by up to 1e19. There is something funny with the
tci feedback signal, possibly an offset or non-linearity.

Engineering Operator Comments
ShotTimeTypeStatusComment
109:01:39:303AMPlasmaOk
209:14:25:050AMPlasmaOk
309:28:43:893AMPlasmaOk
409:50:17:690AMPlasmaOk
510:03:23:460AMPlasmaOk
610:18:35:567AMPlasmaOk
710:47:13:113AMPlasmaOk
811:08:21:393AMPlasmaOk
911:25:09:833AMPlasmaOk
1011:42:16:207AMPlasmaOk
1111:59:56:287AMPlasmaOk
1212:12:48:690PMPlasmaOk
1312:29:04:787PMPlasmaOk
1412:44:46:677PMPlasmaOk
1501:02:01:943PMPlasmaOk
1601:15:05:630PMPlasmaOk
1701:27:41:850PMPlasmaOk
1801:42:15:787PMPlasmaOk
1901:56:42:533PMPlasmaOk
2002:09:35:167PMPlasmaOk
2102:22:20:043PMPlasmaOk
2202:36:18:293PMPlasmaOk
2302:48:57:293PMPlasmaOk
2403:04:36:683PMPlasmaOk
2503:17:22:887PMPlasmaOk
2603:30:06:433PMPlasmaOk
2703:43:46:527PMPlasmaOk
2803:56:31:073PMPlasmaOk
2904:10:52:823PMPlasmaOk
3004:24:43:213PMPlasmaOk
3104:37:19:213PMPlasmaOk
3204:49:54:120PMPlasmaOk
3305:02:40:510PMPlasmaOk