Alcator C-Mod Run 1050602 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):Sam Pierson,Bill Parkin

Engineering Operator Run Comment
MP#409 SOL Phase space study, EO Pierson PO Wolfe SL Lambombard

Session Leader Plans
Entered: Jun 1 2005 05:14:03:663PM
Author: Brian Labombard
Run Plan for 1050602

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
We will continue from the last time we attempted this MP (1050309), moving on to lower
densities, currents and fields: Ip=0.4 MA, Bt=4.0 tesla and Ip=0.4 MA, Bt=2.7 tesla.
If things go well, we will collect some high density data at the nominal
Ip=0.8 MA, Bt=5.4 tesla values in lower single null - something we were not able
to do last time.

Run Preparation Tasks (for probe diagnostics)
- Reconfigure A14 and A12 digitizer connections to outer divertor probe
array according to file: "put_new_fast_refs_2005_mar01.tcl"
- Execute TCL>@put_new_fast_refs_2005_mar01.tcl
- Configure ASP bias supplies: PA93 amplifiers ("DC supply") in standard sweep mode,
"Sweep A" and "Sweep B" set to -200 volts
- Use IDL code to switch ASP probe triggering and ASP/FMP power supply biases
between one of two modes:
"Scan" mode - ASP: N,S,E,W electrodes in current mode, "DC supply"
Probe scanning three times during shot, 256k samples/channel
FMP: OSD**.p0 probes in current mode, "Sweep B" supply
OSD**.p1 probes in current mode, "DC -" supply
OSD**.p2 probes in floating mode, "DC +" supply
"Dwell" mode - ASP: W & S electrodes in current mode, "Sweep A" & "Sweep B"
N & E electrodes in floating mode
Probe in dwell mode, with 512k samples/channel
FMP: OSD**.p0 probes in current mode, "DC -" supply
OSD**.p1 probes in current mode, "DC -" supply
OSD**.p2 probes in floating mode, "DC +" supply
IDL code: mp409_scan.pro
undwell_scan_asp.pro
set_asp_pa93_sweep.pro
set_fmp_sweep.pro
mp409_dwell.pro
dwell_scan_asp.pro
set_asp_fluctuation_mp409.pro
set_fmp_fluctuation_mp409.pro

Run Preparation Tasks (for optical diagnostics)
- 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
Start from shot#1050304024. This shot ran on segment#2. It was a LSN discharge
with Ip=0.8 MA, Bt= 5.4 tesla, NL04 = 0.9e20. Note: segment#3 has
a USN program that we will use (Segment#4 is double-null? will not be used today.)

NOTE: Reprogram: Field to 4 tesla (achieve as early as possible in discharge),
Current to 0.4 MA, density to NL04=0.5e20

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 B16-001. Plenum pressure of 10 PSI.

Shots

=> Ip=0.4 MA, Bt=4 tesla

1,2 LSN, NL04 = 0.5, Scan mode, optimize probe insertion
NINJA puff at 1.1 s, fast camera at 1.25 s
3,4 USN, NL04 = 0.5, Scan mode, optimize probe insertion
NINJA puff at 1.1 s, fast camera at 1.25 s

5 USN, NL04 = 0.4, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
6 LSN, NL04 = 0.4, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s

7 LSN, NL04 = 0.3, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
8 USN, NL04 = 0.3, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s

9 USN, NL04 = 0.2, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
10 LSN, NL04 = 0.2, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s

11 LSN, NL04 = 0.6, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
12 USN, NL04 = 0.6, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s

13 USN, NL04 = 0.7, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
14 LSN, NL04 = 0.7, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s

Change to Ip=0.4 MA, Bt=2.7 tesla

15 LSN, NL04 = 0.5, Scan mode, optimize probe insertion
NINJA puff at 1.1 s, fast camera at 1.25 s
16 USN, NL04 = 0.5, Scan mode, optimize probe insertion
NINJA puff at 1.1 s, fast camera at 1.25 s

17 USN, NL04 = 0.4, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
18 LSN, NL04 = 0.4, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s

19 LSN, NL04 = 0.3, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
20 USN, NL04 = 0.3, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s

21 USN, NL04 = 0.2, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
22 LSN, NL04 = 0.2, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s

23 LSN, NL04 = 0.6, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
24 USN, NL04 = 0.6, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s

25 USN, NL04 = 0.7, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
26 LSN, NL04 = 0.7, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s

Change to Ip=0.8 MA, Bt=5.4 tesla

27 LSN, NL04 = 1.2, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
28 USN, NL04 = 1.2, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
Note: If MARFES persist, then we will skip the USN discharges.

29 USN, NL04 = 1.4, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s
30 LSN, NL04 = 1.4, Scan mode
NINJA puff at 1.1 s, fast camera at 1.25 s

31 Fill NINJA plenum with 40 PSI D2
Set Xybion gain for NL04=2.4
Puff through B16-001 (inner midplane capillary) trigger=0.5s, duration=0.9s
(see shot#1021107016 as an example with 0.1s earlier trigger)
LSN, program NL04=1.0 - flat, get: NL04=1.4 to 2.7, from 0.7 to 1.2 s
Dwell mode,trigger=0.95 (dwell from 0.7 to 1.2s)

32 repeat 31: in Scan mode, with only ASP and ISP scanning at 0.8, 1.0, 1.2s
NL04 ~ 1.6, 2.2, 2.7

33 repeat 32: in Scan mode, with deep ASP scan at 1.2 s
NL04 ~2.7

Physics Operators Plans
Entered: Jun 1 2005 06:16:55:833PM
Author: Steve Wolfe
Engineering setup for Friday, 02 June 2005

MP 409 (con't): SOL Phase Space (day 3)

Session leader: B. Labombard
Physics operator: wolfe

No Overnight ECDC in D2 (or anything else).

Run begins at 9:00 and ends at 17:00.

Power systems as on 1050304024, including A-coils

Gas Setup:
fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 2 psi Ar Hybrid enabled (PG1)
leave B-side upper with He3 Hybrid disabled
fill B-main with 30 psi D2 Hybrid enabled (PG3)
Disable NINJA, but fill the plenum with 10 psi D2.

Torvac setup: Gate valves open


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

RF Setup: NO RF TODAY

-------------------------------------------------------------------------------
Run plan:

This run calls for extremely low density, which may not be available given 
current state of the machine. If we are running into internal fueling
problems, we may want to stop and either switch to a different part of
MP#409, or else go back to the ICRF experiment that didn't get done on 
Wednesday. 

Start from 1050304024, with necessary PCS changes in all segments:
Basically the baseline subtraction needs to be taken into account by removing
the offsets in segs 2,3,4 and a recent startup needs to be used. 

Also, change seg2 (SNL) to 0.4MA, 4T, nl04=.5e20. 
Also, change seg3 (USN) to 0.4MA, 4T, nl04=.5e20

Shot sequence as in SL_PLAN:
1,2 LSN (seg2) nl04=.5
3,4 USN (seg3) nl04=.5
5 USN (seg3 )  nl04=.4
6 LSN (seg2) nl04 = .4
7 LSN (seg2) nl04 = .3  !! I don't believe we can do this
8 USN (seg3) nl04 = .3  !! I sure don't believe we can do this!
9 USN (seg3) nl04 = .2  !* You have got to be kidding!!
10 LSN (seg2) nl04 =.2  !   Ditto
11 LSN (seg2) nl04 =.6  ! That's more likely
12 USN (seg3) nl04 =.6
13 USN (seg3) nl04 =.7  ! Now you're talking!
14 LSN (seg2) nl04 =.7  

Next, reduce field to 2.7 T (seg 2,3)

15 LSN (seg2) nl04 = .5
16 USN (seg3) nl04 = .5
17 USN (seg3) nl04 = .4 ! Here we go (or don't go) again
... and so on, down the list through #26 (see SL_PLAN)

If we get this far (unlikely) change to 5.4T, 0.8MA and
27 LSN (seg2) nl04=1.2
28 USN (seg3) nl04=1.2
and raise density from here per SL_PLAN

Session Leader Summaries
Entered: Jun 2 2005 11:20:59:187PM
Author: Brian Labombard
Run Summary for 1050602

MP#409 "SOL Phase space studies" - Day 3
___________________________________________________________________________________
This was a very productive run, despite some initial concerns of attaining low
density plasmas with the titanium dust in the machine. We managed to finish a
careful scan of plasma density over the range of NL04= 0.15 to 0.6e20 in matched upper
and lower null topologies (Ip = 0.4 MA, Bt = 4.0 tesla). The run plan also called
for doing a density scan at Bt=2.7 tesla. We did manage to start the scan, setting up
a lower null (shot# 32) and upper null discharge (shot# 33) at NL04=0.5e19 - thanks
once again to Steve Wolfe's excellent job at the controls. I think the really good
news is that, based on our experience today, we should be able to bang out the rest of
the discharges in this density scan sometime during this campaign (despite Ti dust)
with the help of these starting shots.
The repaired ASP mach probe head worked well today. It appears to be reporting
similar flow data as the previous one we toasted during MP#410 (1050428). Turbulence
imaging data was also collected on a number of shots (after 1.2s), although the low
densities resulted in low signal levels on the cameras. Boron Doppler spectroscopy
on the inner wall was attempted today, but the low density plus low intrinsic boron
levels in the machine (covered with Ti films?) made the signal levels too low to be
useful.
The interesting bit of information that we hope to extract from the probe
data taken today is how the SOL profiles evolve as n/nG is raised at low
absolute densities. Does a similar 'shoulder' appear in the far SOL at these
densities compared to discharges with twice the current? This will require
loading the edge database and processing the profiles. Stay tuned.

Quick shot log:

Shots with Ip=0.4 MA, Bt=0.4 tesla

NL04=0.4 requested
1 - LSN, NL04=0.45, Ip=0.4, Bt=4 no probes scanning, disrupted at 0.75
2 - LSN, NL04=0.5, Ip=0.4, Bt=4 no probes scanning, disrupted at 0.96
3 - LSN, NL04=0.4, Ip=0.4, Bt=4 no probes scanning, disrupted at 0.76
4 - LSN, NL04=0.35, Ip=0.4, Bt=4 no probes scanning, disrupted at 0.77
5 - dud
6 - LSN, NL04=0.4, Ip=0.4, Bt=4 ASP scanning in far SOL, no NINJA, full length shot
7 - LSN, NL04=0.38, ASP(+8), FSP(+5), ISP at 0.65, 0.85, 1.05 ISP 0-90 only pulse length was 22 ms
8 - LSN, NL04=0.4, ASP(+9), FSP(+5), ISP(18ms) at 0.65, 0.85, 1.05 - good targeting
9 - LSN, NL04=0.4, ASP(+9), FSP(+5), ISP(18ms) at 0.65, 0.85, 1.05 - ASP a little deep, ISP great, FSP ok
10 - USN, NL04=0.37, ISP only
11 - USN, NL04=0.4, ASP(+7)- not scanning, FSP(+11)-not scanning, ISP(18ms) at 0.65, 0.85, 1.05
12 - fizzle
13 - USN, NL04=0.4, ASP(+7), FSP(+11), ISP(18ms) at 0.65, 0.85, 1.05 - good targeting

NL04=0.3 requested
14 - USN, NL04=0.28, ASP(+8), FSP(+12), ISP(18ms) at 0.65, 0.85, 1.05 - excellent targeting
15 - LSN, NL04=0.3, ASP(+8), FSP(+6), ISP(18ms) at 0.65, 0.85, 1.05 - good targeting

NL04=0.2 requested
16 - LSN, NL04=0.29,0.17,0.14, ASP(+8), FSP(+7), ISP(18ms) at 0.65, 0.85, 1.05
change in equilibrium, FSP goes deep, ISP way deep.
17 - LSN, NL04=0.15, ASP(+8), FSP(+7), ISP(18ms) at 0.65, 0.85, 1.05
18 - USN, NL04=0.14, ASP(+8), FSP(+12), ISP(18ms) at 0.65, 0.85, 1.05
serious runaway electrons. ASP gets toasted on last scan.
19 - USN, NL04=0.2, ASP(+8), FSP(+12), ISP(18ms) at 0.65, 0.85, 1.05 - good targeting

NL04=0.5 requested
20 - USN, NL04=0.45, ASP(+7), FSP(+11), ISP(18ms) at 0.65, 0.85, 1.05 - could be deeper
21 - USN, NL04=0.5, ASP(+9), FSP(+13), ISP(18ms) at 0.65, 0.85, 1.05 - better, could be deeper still
22 - fizzle
23 - LSN, NL04=0.52, ASP(+9), FSP(+5), ISP(18ms) at 0.65, 0.85, 1.05 - FSP could be deeper

NL04=0.6 requested
24 - LSN, NL04=0.63, ASP(+9), FSP(+6), ISP(18ms) at 0.65, 0.85, 1.05 - FSP could be deeper
25 - USN, NL04=0.61, ASP(+10), FSP(+15), ISP(18ms) at 0.65, 0.85, 1.05 - could be deeper
cross-over lurch at 0.8s causes divertor detachment(?) or something, leading to
no plasma observed on ISP for second and third scans.
26 - fizzle
27 - USN, NL04=0.6, ASP(+12), FSP(+18), ISP(18ms) at 0.65, 0.85, 1.05

NL04=0.7 requested
28 - LSN, NL04=0.7, ASP(+11), FSP(+10), ISP(18ms) at 0.65, 0.85, 1.05 - could be deeper
29 - fizzle
30 - LSN, NL04=0.69, ASP(+14), FSP(+15), ISP(18ms) at 0.65, 0.85, 1.05 - deeper, still cold

Change to Bt=2.7
NL04=0.5 requested
31 - LSN, NL04=0.5, ASP(+9), FSP(+8), ISP(14ms) at 0.75, 0.9, (1.1,1.15) -
32 - LSN, NL04=0.5, ASP(+10), FSP(+10), ISP(14ms) at 0.8, 1.0, 1.2 - targeting ok
33 - USN, NL04=0.48, ASP(+11), FSP(+14), ISP(14ms) at 0.8, 1.0, 1.2 - ok targeting, ISP could be deeper

Physics Operator Summaries
Entered: Jun 2 2005 05:32:26:983PM
Author: Steve Wolfe
Physop Summary for 1050602

Contrary to my expectation there was no problem running the low densities
called for in the run plan. The machine ran pretty reliably today, although I
lost a few shots to fizzles through inadequate chasing of the pre-puff as we
ran the density up and down. 

THE STARTUPS IN SEG1 AFTER SHOT#2 SHOULD NOT BE USED FOR NORMAL CURRENT
RUNS. THE ENGINEERING SETUP WAS ALSO CHANGED AS OF SHOT 15 (EARLY CROWBAR) AND
ALSO SHOULD NOT BE USED FOR NORMAL CURRENT RUNS. 

Note also that segment 2 has lower null and segment 3 has upper 
null. 

The first 5 shots disrupted before 1sec, apparently because of an early onset
locked mode. This was pointed out by Amanda. The Acoil was on too strong for
the field and current, and was overcompensating the error field. On shot#6 I
decreased the acoil current from 2000A to 1000A (program), and we had no more
early disruptions. These shots may be of interest for the locked mode database
as threshold points in first quadrant. When we went down to 2.7 tesla, I made
an additional adjustment to the acoil, but this may not have been
necessary. There were some mid-rampdown disruptions which may have had locked
modes.

I spent a fair amount of time minimizing the current overshoot for these 400kA
plasmas. Ip control was turned on in segment 1, and the feedforward oh1
voltage was reduced in both segment 1 and segs 2 and 3. The oh crowbars were
moved from .12 sec to .08 sec. The gain was raised to 4 in segment 1 and early
in 2 and 3. I succeeded in getting the overshoot down to about 40ka, with the
extra rise coming in the second segment; the current at segment switch was
below 400kA. On shot#16, I reduced V_OH1 to 50V for the whole second segment
and for some reason the time of diverting was delayed to 0.5sec, with a big
clearin error. After that I put the second segment V_OH1 back to 100V to
.15sec and then 150V; dropping the early value would probably have gotten rid
of the overshoot completely, but I didn't want to risk losing more data for
the run, so I left it alone after that. 

Flat density down to 3e19 were obtained without a lot of runaways, and the
shots aimed at 2e19 ended up down to 1.4e19 or so, but had a LOT of
runaways. There was absolutely no problem with internal D2 fueling. In fact
even the 2e19 cases had finite gas puff under feedback. 

We got through Brian's program, somewhat out of order, through point#16 (Upper
null at 0.5e19, 400kA, 2.7tesla). The entire scan at 4T was completed except
for the upper null point at 0.7e19. 

Scorecard:

Date 1050602:  33 shots.  28 plasmas.   4 fizzles.   1 duds.   0 System Error.
        (Plasma = Ip gt 50.0 kA   Dud = H_alpha lt  0.40 V)
Total plasma duration: 49.42 s (exceeding  -56 kA)

Session Leader Comments
Jun 2 2005 09:14:30:450AM1050602001Brian LabombardShot 1 4 tesla, 0.4 MA, NL04=0.45e19
Disrupted at 0.75 s
No probes scanning, no NINJA puff.
Jun 2 2005 09:43:53:060AM1050602002Brian LabombardShot 2 4 tesla, 0.4 MA, NL04=0.5e19
Outer div. detaches at 0.71 s
Disrupted at 0.96
No probes, no NINJA.
Jun 2 2005 09:50:29:013AM1050602003Brian LabombardShot 3 4 tesla, 0.4 MA, NL04=0.5e19
Detaches at .71s, Disrupted at 0.76s
No probes, no NINJA.
Jun 2 2005 10:05:31:513AM1050602004Brian LabombardShot 4 4 tesla, 0.4 MA, NL04=0.35e19, with ramp up to disruption
Detaches at .7s, Disrupted at 0.77s
No probes, no NINJA.
Jun 2 2005 10:40:01:263AM1050602006Brian LabombardShot 6 4 tesla, 0.4 MA, NL04=0.4e19 - good shot
ASP scanning in far SOL

Next: repeat with NINJA puff and probes scanning
Jun 2 2005 11:09:13:590AM1050602007Brian LabombardShot 7 NL04=0.4, ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - cleans up on first scan
FSP - good targeting on first scan
ISP - did not swing past 90 degrees - go to 0.018s pulse length

Next: repeat with strike point on outer divertor
Jun 2 2005 11:22:29:170AM1050602008Brian LabombardShot 8 NL04=0.4, ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - ok
FSP - good targeting on first scan
ISP(18ms) - ok, swings 180
Jun 2 2005 11:44:15:060AM1050602009Brian LabombardShot 9 NL04=0.4, ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - a little deep
FSP - ok
ISP(18ms) - excellent targeting
Jun 2 2005 11:45:05:060AM1050602010Brian LabombardShot 10 USN, NL04=0.35, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ISP - could be deeper

Next: repeat with probes scanning.
Jun 2 2005 12:03:23:920PM1050602011Brian LabombardShot 11 USN, NL04=0.4, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ISP - again could be deeper

Next: repeat with ASP and FSP scanning this time
Jun 2 2005 12:52:51:467PM1050602014Brian LabombardShot 14 USN, NL04=0.28, ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - good
FSP - good
ISP - good

Next: go to LSN at NL04=0.3
Jun 2 2005 01:08:50:840PM1050602015Brian LabombardShot 15 LSN, NL04=0.3, ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - good
FSP - good
ISP - good

Next: go to NL04=0.2
Jun 2 2005 01:26:09:153PM1050602016Brian LabombardShot 16 LSN, NL04=0.29, 0.17, 0.14, ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
- problem with equilibrium control. Gaps are not as programmed.
ASP - ok, then too far
FSP - over-inserted
ISP - way over-inserted on first scan

Next: try again
Jun 2 2005 01:48:55:937PM1050602017Brian LabombardShot 17 LSN, NL04=0.15 ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - ok, toasty
FSP - ok
ISP - ok

Next: got to USN at NL04=0.2
Jun 2 2005 01:51:47:357PM1050602018Brian LabombardShot 18 USN, NL04=0.14 ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
serious runaway electrons!
NINJA D2 puff
ASP - overheats on last scan
FSP - ok, toasty
ISP - ok

Next: repeat, without e- beam
Jun 2 2005 02:17:29:890PM1050602020Brian LabombardShot 20 USN, NL04=0.46 ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - could be deeper
FSP - could be deeper
ISP - also could be deeper

Next: repeat with deeper probes
Jun 2 2005 02:29:05:873PM1050602021Brian LabombardShot 21 USN, NL04=0.5 ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - better, could be deeper still
FSP - ""
ISP - ""

Next: go to LSN at NL04=0.5
Jun 2 2005 03:10:05:780PM1050602023Brian LabombardShot 23 LSN, NL04=0.52 ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - good targeting
FSP - could be deeper
ISP - ok

Next: go to NL04=0.6
Jun 2 2005 03:13:19:030PM1050602024Brian LabombardShot 24 LSN, NL04=0.6 ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - good targeting
FSP - could be deeper
ISP - ok

Next: go to USN, NL04=0.6
Jun 2 2005 03:24:16:170PM1050602025Brian LabombardShot 25 USN, NL04=0.6 ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - could be deeper
FSP - could be deeper
ISP - ok

Next: repeat with probes deeper
Jun 2 2005 03:49:26:577PM1050602027Brian LabombardShot 27 USN, NL04=0.6 ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - ok
FSP - ok
ISP - ok

Next: go to LSN with NL04=0.7
Jun 2 2005 04:08:38:983PM1050602028Brian LabombardShot 28 LSN, NL04=0.7 ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - could be deeper
FSP - could be deeper
ISP - ok

Next: repeat with probes poking deeper
Jun 2 2005 04:40:09:483PM1050602030Brian LabombardShot 30 LSN, NL04=0.7 ASP, FSP, ISP scanning at 0.65, 0.85, 1.05s
NINJA D2 puff
ASP - ok, cold
FSP - ok,cold
ISP - ok

Next: go to Bt=2.7 tesla, NL04=0.5
Jun 2 2005 04:41:20:513PM1050602031Brian LabombardShot 31 LSN, Bt=2.7, NL04=0.5 ASP, FSP, ISP scanning at 0.75, 0.9, (1.1 or 1.15)s
NINJA D2 puff
ASP - ok
FSP - ok
ISP - ok

Next: repeat with better probe timing
Jun 2 2005 04:53:13:077PM1050602032Brian LabombardShot 32 LSN, Bt=2.7, NL04=0.5 ASP, FSP, ISP scanning at 0.8, 1.0, 1.2s
NINJA D2 puff
ASP - ok
FSP - ok
ISP - ok

Next: go to USN, NL04=0.5
Jun 2 2005 05:32:03:280PM1050602033Brian LabombardShot 33 USN, Bt=2.7, NL04=0.48 ASP, FSP, ISP scanning at 0.8, 1.0, 1.2s
NINJA D2 puff
ASP - ok
FSP - ok
ISP - ok, could be deeper

Physics Operator Comments
Jun 2 2005 07:27:44:843AMSteve Wolfe
Load from 1050304024
Import seg1 from 1050601021
Seg2: zero offsets on clearin, ip
Seg3: zero offsets on clearin, ip
Seg4: zero offsets on clearin, ip
Now change field, current, nl04 to starting values for this run:
Seg2: ALL_Vs
   TF from -150000 to -111000
   PG3 to zero
   Acoil cur from 2000 to 1500
 ALL_Ps:
   Ip from -800000 to -400000
   nl04 from 1e20 to 5e19
Seg3: All_Ps copy Ip, Nl04 from seg2
      All_Vs copy Acoil, TF, Pg3, pg1 from seg2
Load/clean; timestamp ack on p13, seg1; touch and reload
Load at  2-Jun-2005 07:27:24.00
Open tree /home/wolfe/pcs_scratch      -1
Open tree done

Jun 2 2005 07:28:56:327AMSteve Wolfe
Change segment titles from 0.8MA to 0.4MA and reload
Load at  2-Jun-2005 07:28:34.00
Open tree /home/wolfe/pcs_scratch      -1
Open tree done

Jun 2 2005 09:37:43:450AM1050602001Steve Wolfe
Shot#1: Supposed to be 4T lower null at 5e19
Short plasma. Disrupts at .76sec. Density starts very low
gets UP to 5e19 before end of shot. Looks like a big injection 
at .69sec. No hards
breakdown is a little late 6.3sec on Halpha, later on Zmeter?
Bz looks a little negative, Br0 near zero

next shot: no changes, try again

Jun 2 2005 09:28:07:933AM1050602002Steve Wolfe
Shot#2: Disrupts at .95sec, similar behavior.
breakdown around 7msec.
next shot: ef4 10Amps postive,start Ip control in seg1

Jun 2 2005 09:45:50:950AM1050602003Steve Wolfe
Shot#3: ef4 from -1320 to -1310
Turn on Ip control in seg1 (gain 1 from 70ms)
and lower initial point in seg2
Still disrupting early. Brian says it was detaching
on the previous shot. This one makes it to .76 again
Current still overshoots, either I don't have enough
gain or I missed something.
breakdown earlier, around 5ms

next shot: raise Ip gain to 2 at .085sec
Drop nl04 to 4e19

Jun 2 2005 10:03:34:000AM1050602004Steve Wolfe
Shot#4:raise Ip gain to 2 at .085sec
Drop nl04 to 4e19, lower zxl from 0 to -.01
Still short, around .79sec, still overshooting on current
It got 4e19, then rises starting at .72sec 
Could move rxl in a bit if there is a problem on the divertor

Possible locked mode around 0.5sec, shortly after Acoil comes on
OH1 is still before crossover, I may be causing it.

next shot: Disable Bside lower
Decrease acoil current to 1000A, rxl from 0 to -.01

Jun 2 2005 10:13:13:810AM1050602005Steve Wolfe
Shot#5:raise Ip gain to 4 at .085sec
 Disable Bside lower
Decrease acoil current to 1000A, rxl from 0 to -.01
Dud. Long delay in INIT and then in CHECK, but it didn't
timeout. Fields look fine. 

next shot: raise PG4

Jun 2 2005 10:31:21:140AM1050602006Steve Wolfe
Shot#6:PG4 from 29 to 33msec
Ip gain at 4 at .085sec
 Disable Bside lower
 acoil current to 1000A, rxl from 0 to -.01
Plasma full length, finally! Nl04 holding at 0.4e20
Current still overshooting, like it isn't paying
attention to the feedback in seg1?
No sign of a locked mode, model b21<1G
Breakdown still a little late 6.8msec

Next shot: repeat with NINJA on

Jun 2 2005 10:52:03:170AM1050602007Steve Wolfe
Shot#7:Extend Acoil into rampdown,Br0 from .00025 to 0.0000
 Otherwise, repeat with NINJA on

Some delay before this shot because Granetz managed to raise
machine pressure to 100mTorr range by purging the gas jet.

Plasma full length, looked like some runaways this time.
Bouncy startup. Breakdown still at 6.6ms
Only a small rise in nl04 after 1sec.

Next shot: Raise pg4 some more

Jun 2 2005 11:08:05:890AM1050602008Steve Wolfe
Shot#8:: Raise pg4 from 33 to 36msec
Move rxl, zxl back to zero from -.01
plasma full length, got rid of the runaways
bd a little earlier

next shot: Decrease v_oh1 between .05 and .1sec

Jun 2 2005 11:26:18:200AM1050602009Steve Wolfe
Shot#9::  Decrease v_oh1 to 100V between .071sec and .1sec
SL wants 2mm smaller gap on inside
CLEARIN from .004 to .002
RCUR smaller by .001

Plasma full length. Poke, poke, poke.
Ip is still overshooting, doesn't seem to be paying attention
to anything in seg1?
bd even a little earlier, no bounce, no runaways.

next shot: upper null

Jun 2 2005 11:37:02:733AM1050602010Steve Wolfe
Shot#10:go to upper null
Copy Acoil program from seg2 to seg3
Copy nl04, Ip from seg2 to seg3
seg2 off, seg3 on
Plasma full length. It looked upper.

next shot: drop voh1 in first 200ms of seg3
I may need to move crowbar earlier, but hold off for now

Jun 2 2005 11:54:48:280AM1050602011Steve Wolfe
Shot#11: drop voh1 in first 50ms of seg3 from 250 to 100V
I may need to move crowbar earlier, but hold off for now
SL wants inner gap smaller by 2mm
clearin from .004 to .002
rcur smaller by 1mm

Plasma full length. Smaller overshoot on Ip this time,
just touches 500kA. 
next shot: raise early Ip gain in seg3 from 1.8 to 4.0

Jun 2 2005 12:04:56:653PM1050602012Steve Wolfe
Shot#12: raise early Ip gain in seg3 from 1.8 to 4.0
  (if that works I have to remember to copy this all to seg2)
Drop the voh1 point at .052sec from 250V to 150V in seg1
SL wants another 2mm smaller inner gap
CLEARIN from .002 to 0., rcur smaller by .001
fizzle. slower current rise, previous one also showed signs
next: drop pg4

Jun 2 2005 12:19:17:890PM1050602013Steve Wolfe
Shot#13:pg4 from 36ms to 33ms
early Ip gain in seg3 at 4.0
  (if that works I have to remember to copy this all to seg2)
 voh1 point at .052sec at 150V in seg1
CLEARIN at 0., rcur smaller than shot 11 by .001
plasma full length, overshoot down to 470kA. 

next: drop voh1 in seg1 some more

Jun 2 2005 12:37:33:950PM1050602014Steve Wolfe
Shot#14: voh1 point at .052sec from 150 to 100V,later points to 50V in seg1
Drop nl04 from 4e19 to 3e19
This will be point#8 in the SL plan (with 7 to follow)
plasma full length
Slight density overshoot (to 4, then back down to 3e19)
Ip still overshooting to 470. 
Camac gas puff data missing, but we were puffing to maintain 3e19.

next shot: drop pg3 puff in seg1, OH crowbars to .08sec

Jun 2 2005 01:04:55:467PM1050602015Steve Wolfe
Shot#15:  drop pg3 puff in seg1 to 20V,
 OH crowbars to .08sec from .120sec
Copy seg3 Voh1 to seg2, also change ip gain to 4 in seg2
Copy seg3 nl04 to seg2
Turn seg3 off, seg2 on
Going to lower null again, this is point#7 on SL_PLAN
There was a 25minute delay while SZ&JT fixed cameras in cell

Plasma full length, Ip still overshooting to 450kA,in seg 2.
nl04 3e19, with a drop to 2e19 between .29 and .5sec,
no overshoot

Next shot:Voh1 in seg 2 down to 50V, and lower nl04 to 0.2

Jun 2 2005 01:21:19:763PM1050602016Steve Wolfe
Shot#16:  Voh1 in seg 2 down to 50V, all the way across
nl04 down to 0.2e19 in seg2
This is point#10 in SL_PLAN
Breakdown on 15 was late(7.2ms), probably should have tweaked startup
plasma full length. Current still overshooting, 430kA
density overshoots to 3.5 and then drops to 2e19
bd back earlier again
But this one seems to be limited through 0.5sec?

next: turn off pg3 in seg1

Jun 2 2005 01:35:50:857PM1050602017Steve Wolfe
Shot#17:   turn off pg3 in seg1
Put voh1 back the way it was on 15.
plasma full length, but runaways building during the shot.
nl04=1.4e19 and flat once it diverts (which it does at .24 this time)
I could program 10V pg3 puff, I don't have any headroom on nl04
gain (the error is all of 6e18!)

next move to upper null

Jun 2 2005 01:44:55:013PM1050602018Steve Wolfe
Shot#18: copy nl04 from seg2 to seg3,
turn off seg2, on seg3
This is point#9 in SL_PLAN
plasma but full runaway shot from .45sec on.
Nl04 not as flat, but below 2e19

Next: try to get a shot at 2e19 that has more than one electron

Jun 2 2005 01:56:03:140PM1050602019Steve Wolfe
Shot#19:  try to get a shot at 2e19 that doesn't runaway
pg3 to 20V in seg1, to 10V from .3sec through 1sec in seg3
increase pg4 33ms to 35ms
Still has runaways, not as bad as 18 (but close)
nl04 still lower than 2e19
startup bounced, I guess I didn't raise pg4 enough.

Next: try for 2.5e19 programmed

Jun 2 2005 02:12:33:187PM1050602020Steve Wolfe
Shot#20: Change of plans:
try for 5e19 programmed (point#3 in SL_PLAN),
Also raise pg4 from 35 to 38ms to try to stop bounce
Plasma, still some runaways. Startup still bounces.
density pretty close, not perfect.

next: repeat for probes

Jun 2 2005 02:21:49:250PM1050602021Steve Wolfe
Shot#21: Copy nl04 and pg3 from seg3 to seg2 but don't turn on.
Leave pg4 alone after higher density shot
Leave seg3 pg3 alone, see if wall loads up a little
plasma full length, no runaways, no bounce
nl04 up a bit, pretty close.

next shot: drop pg4 3msec, probably go to lower null

Jun 2 2005 02:34:15:297PM1050602022Steve Wolfe
Shot#22:  drop pg4 38 to 35msec, 
go to lower null: Seg3 off, seg2 on
I suppose this is point#2 of plan

fizzle. Either dropped pg4 too much or too little
Looks like too little.
next: pg4 down to 30msec

Jun 2 2005 02:51:34:293PM1050602023Steve Wolfe
Shot#23:  drop pg4 35msec to 30msec, 
going for lower null: Seg3 off, seg2 on
plasma full length
bouncy startup, small early runaway population
nl04=5e19 (until NINJA)

next: 6e19

Jun 2 2005 03:00:29:327PM1050602024Steve Wolfe
Shot#24:nl04 to 6e19. No change in pg4; see if gas comes up
on its own.

plasma full length, still bouncy, need to raise the gas a bit
density looks good.

Jun 2 2005 03:20:02:857PM1050602025Steve Wolfe
Shot#25:Pg4 to 32msec 
get rid of ramping rcur after 1.1sec for JT (seg2)
Also in seg3 (upper null).
Program nl04 to rise to 1.0e20 after 1.3sec for SZ
seg2 off , seg3 on (Upper null point 12)
plasma disrupted in ramdown
nl04 .6e20 early, then 1.2e20
no runaways, hint of hesitation in startup
SZ says now it's too bright, he wants less gas late

next: drop second plateau to 0.7e19

Jun 2 2005 03:26:43:200PM1050602026Steve Wolfe
Shot#26:drop second plateau to 0.7e19, otherwise repeat
fizzle, should have dropped the gas
next pg4 from 32 to 29ms

Jun 2 2005 03:41:26:013PM1050602027Steve Wolfe
Shot#27:pg4 from 32 to 29m
second density plateau to 7e19
Still trying to get upper null, 6e19 for Brian
plasma to 1.7sec, still disrupting in rampdown
and this one had early runaways (bouncer, too big 
a drop on pg4). nl04 doing what we asked, but still
seems to get a big marfe late. 

next shot: second plateau off, probably going to .7e20

Jun 2 2005 03:54:07:857PM1050602028Steve Wolfe
Shot#28:Lower null and 0.7e20 
seg2 program 7e19.
Seg3 off, seg2 on
pg4 from 29 to 30msec
plasma to 1.8sec, nl04=0.7e20
I seem to have the pg3 in seg1 coming on too early. 

next shot: fix pg3 in seg1, see what SL wants

Jun 2 2005 04:05:36:100PM1050602029Steve Wolfe
Shot#29: delay pg3 in seg1 to 30msec
Otherwise, repeat for a deeper probe plunge
fizzle, slightly later bd, moves in

next: pg4 to 28msec, ef4 10A negative

Jun 2 2005 04:26:23:813PM1050602030Steve Wolfe
Shot#30:pg4 from 30 to 28msec, 
ic_ef4 from -1310 to -1320
plasma to 1.8sec
Bouncy startup, there is no range in pressure
next shot: nl05=5e19, B=2.7T

Jun 2 2005 04:31:29:313PM1050602031Steve Wolfe
Shot#31: nl05=5e19, B=2.7T
acoil current down to 800A prog. from 1000A
ITF to -75kA
No change to startup, let it bounce
plasma to 1.8 sec, got 2.9T instead of 2.7,
otherwise ok. 

next shot: drop I_tf to -70ka

Jun 2 2005 04:42:31:310PM1050602032Steve Wolfe
Shot#32: drop I_tf to -70ka
and start the drop at .05 in seg1
ramp acoil from 800 to 1000
plasma to 1.8sec

next shot: upper null like this one

Jun 2 2005 04:56:59:140PM1050602033Steve Wolfe
Shot#33:  upper null like 32:
Copy seg2 to seg3:tf, acoil ; nl04
seg2 off, seg3 on
change acoil program to ramp to 1200,
increase pg4 from 28 to 30msec
This is point#16 in the plan.
plasma to 1.8, Brian has good data.
That's it for today.

Engineering Operator Comments
ShotTimeTypeStatusComment
109:04:06:500AMPlasmaOk
209:21:34:903AMPlasmaOk
309:37:11:560AMPlasmaOk
409:51:27:920AMPlasmaOk
510:06:06:653AMPlasmaOk
610:24:37:437AMPlasmaOk
710:47:42:403AMPlasmaOk
811:04:04:217AMPlasmaOk
911:20:15:577AMPlasmaOk
1011:33:09:700AMPlasmaOk
1111:45:39:653AMPlasmaOk
1212:02:30:043PMPlasmaOk
1312:15:01:310PMPlasmaOk
1412:28:27:530PMPlasmaOk
1512:57:19:403PMPlasmaOk
1601:09:59:543PMPlasmaOk
1701:26:19:717PMPlasmaOk
1801:39:16:077PMPlasmaOk
1901:51:56:093PMPlasmaOk
2002:05:16:747PMPlasmaOk
2102:18:25:450PMPlasmaOk
2202:31:25:390PMPlasmaOk
2302:44:04:013PMPlasmaOk
2402:57:01:230PMPlasmaOk
2503:11:43:373PMPlasmaOk
2603:24:16:560PMPlasmaOk
2703:37:02:950PMPlasmaOk
2803:49:54:297PMPlasmaOk
2904:02:35:967PMPlasmaOk
3004:15:11:210PMPlasmaOk
3104:27:52:657PMPlasmaOk
3204:40:32:860PMPlasmaOk
3304:53:02:343PMPlasmaOk