Alcator C-Mod Run 1100903 Information

Miniproposals

Miniproposal: 564

Date Filed: 7/30/2009

Title: Power requirements for high confinement H-modes and the role of radiated power spatial distribution

First Author: Alberto Loarte

Session Leader: Jerry Hughes (shots 1-31)

Operators
Session leader(s):	Jerry Hughes
Physics operator(s):	Ron Parker
Engineering operator(s):	Bill Cochran,Bill Parkin,Gary Dekow

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

Session Leader Plans

Entered: Sep 2 2010 12:35:17:283PM

Author: Jerry Hughes

Session Leader plan for 1100903
MP564: "Power requirements for high confinement H-modes and the role
of radiated power spatial distribution"

Phys. Operator: R. Parker / S. Shiraiwa
Session Leader: J. Hughes / A. Loarte
Impurity maestro: M. Reinke

Special gas setup:

fill B-side lower with 3 psi Ne Hybrid DISABLED (PG1)
** Please purge B-side lower 3 times to ensure Ar is all out **
fill H-Bottom with 1 psi Ar Hybrid DISABLED (PG5)
fill NINJA with 10 psi D2 DISABLED

Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus, DNB

ICRF required, all transmitters. D(H) heating.

NO lower hybrid
NO cryopump

DIAGNOSTICS:
TCI,TS,ECE diags.
VUV/SXR spectroscopy.
DNB requested.
Reflectometry, PCI
Divertor IR imaging for heat-flux measurements
NINJA can puff for turbulence/CXRS near the end of the H-mode

Overnight boronization followed by ECDC in D2/He
Use sweep and dwell parameters from Aug 25.

The target discharge for this experiment will be 800kA, 5.4T, with
nl04=8e19 and with an equilibrium shape matching that on
1091019006. Due to recent issues with an inner wall tile that has
caused injections in the first 400ms of some of our discharges, I
would prefer that the PO did not simply load from 1091019006. It is
probably better to load from a more recent shot which is known to be
tolerant of the inner wall tile (1100831004 is one example), and then make
adjustments after the
divert time to make the discharge shape overlap 1091019006. (This
could be done entirely by changing the programming in Segment 2 of the
recent shot. Another option would be to copy Segment 2 of 1091019006
into Segment 3 of the model, then turn Segment 3 on at 0.4s.)

Key shape targets we are looking for in the flattop:
RIGHT gap = 1.3cm
LEFT gap = 1.5cm
ZXL = -37.3cm
RXL = 55.6cm
ZXU = 45cm
RXU = 52cm
SSEP = -3cm

Impurity seeding will be accomplished using DPCS piezo chopper control
during a 200ms window prior to the RF turn on, and optionally during
additional time periods later in the discharge. We will use
B-side-lower for seeding in order to remain consistent with prior
experiments. H-bottom will be used for the diagnostic Ar puff.

Note that for consistency with prior expeirments, this plan does not
call for strike point sweep. However, at any point if it looks like a
strike point sweep is necessary to protect divertor probes, we will
put one in.

Run Plan

Part 1:

Recover target discharge (see above). Set Ar puff from H-bot (PG5) to
be full on from 0.2 to 0.25s. Set Ne puff from B-side lower (PG1) to
be 50V from 0.4 to 0.6s.

Begin boronization recovery of ICRF during the period of 0.6 to
1.5s. We will need to get as much power as possible from D,E and J.

Part 2:

Once clean RF is established, find H-mode power threshold. Start with
a ramp from 0.5 to 2.5MW over 0.6--1.5s. Find the level of ICRF at
transition P_0. Then change to an ICRF staircase with power steps at
0.6s and 1.0s. Power levels will be, first, P_0 - 0.75MW, and second,
P_0 - 0.25MW. Adjust power levels in the staircase shot-to-shot until
P_th is well bracketed.

Part 3:

Execute ICRF power ramps from 3 to 5MW. Begin Ne scan by setting PG1
program to 100V, then step down shot to shot. Additional pulses may be
needed during the H-mode phases as well. Adjust ICRF power as needed
to fill in Pnet scan and obtain good data on divertor bolometry, IR
camera et al.

Part 4.

Fill B-side lower with 20psi N2 and enable. Set PG1 to 100V from 0.5
to 1.4s. Begin N2 seeding with ICRF power ramps from 3 to
5MW. Additional N2 pulses may be needed during the H-mode phases as
well. Adjust ICRF power and N2 input as needed to fill in Pnet scan
and obtain good data on divertor bolometry, IR camera et al.

Part 5.

If time remains, choose a good seeded case and modify the plasma
equilibrium to represent a more typical C-Mod case, now that we can
actually put power on the lower outer divertor.

Physics Operators Plans

Entered: Sep 2 2010 04:59:59:660PM

Author: Syunichi Shiraiwa

PO plan for 1100903

MP564: "Power requirements for high confinement H-modes and the role
of radiated power spatial distribution"

Phys. Operator: R. Parker / S. Shiraiwa
Session Leader: J. Hughes / A. Loarte
Impurity maestro: M. Reinke

Run will start at 09:00 and end at 17:00.

Boronization :
There will be overnight boronization, followed by morning ECDC.
SL's desired recipe (NOTE change in sweep parameters!):

dP=120 psi
** change in sweep **
rmin/rdwell/rmax: 44/75/80 cm
tdwell/tsweep: 60/120 s
Zero EF4 current
Pulser 0.7 on 0.3 off

Post boronization ECDC
----------------------------
1st Gas Setup:
Gas: He
sweep: 44/45/103 cm
scan: 20/120 s
Pressure: 5e-5 Torr
Duration: 2 hrs

2nd Gas Setup
Gas: D2
sweep: 44/45/103 cm
scan: 20/120 s
Pressure: 2e-4 Torr
Duration:1 hr

----------------------

Special gas setup:
Fill B-Top with 6 psi D2 Hybrid enabled (PG4)
Fill B-side lower with 3 psi Ne Hybrid ENABLED (PG1)
** Please purge B-side lower 3 times to ensure Ar is all out **
Fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3)
Fill H-Bottom with 1 psi Ar Hybrid ENABLED (PG5)
Fill NINJA with 10 psi D2 DISABLED
Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus, DNB

Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled
Power systems as on 1100831004 (5.4 T, 800 kA)

ICRF
All transmitters. D(H) heating
LH: no
DNB: yes
Cryopump: no

Diagnostics : See SL plan

1) Establish target plasma.
Load 1100831004 and modify the shape parameters to reach the same plasma
shape at 0.4s with 1091019006. See the suggested change in SL plan

Session Leader Summaries

Entered: Sep 4 2010 01:59:36:260PM

Author: Jerry Hughes

This run is dedicated to Alberto Loarte's third child, who came into this world
10 hours before the run started. Congratulations to Alberto!

This was a fairly productive run in which we touched on every step of
the run plan, in spite of some data acquisition hang-ups mid-day and a couple
of EF1 commutation faults.

We recovered the equilibrium from prior executions of MP564 without much trouble
and implemented it without tickling the protrusion on the inner wall too badly.
Injections from there and other locations were fairly minimal, thanks largely
to the use of Ne and N2 seeding throughout the day. All plasma shots except for
002 made use of significant seeding puffs of either Ne (003--019) or N2 (20--31).
ICRF recovery from boronization was reasonably good, and by the afternoon,
3--4.5MW of ICRF power were coupled cleanly to plasma, with seeding.

The L-H power threshold was measured on shots 005--008 with active Ne seeding,
and was found to correspond to P_loss=1.5MW, which agrees with the ITER scaling
law within 20%.

Our attempts to lower the impurity puff rates of both Ne and N2 led to increased
Mo accumulation during ICRF. (Just as remarkable an observation now as it was
before) Therefore, most of our data were obtained with fairly high radiated power
fractions. Nonetheless, as in prior experiments we were able to demonstrate
H98~1 operation with very small heat loads to the outer divertor. Key diagnostic
enhancements this time around include improved coverage of kinetic profiles with
Thomson scattering, IR camera data on the outer divertor, and divertor bolometry.

On shots 013 and 014 we used strike point sweeping at constant ICRF power to help
the divertor team map out the heat flux footprint at low power. Sweeping the
strike above the fourth tile row led to deterioration in confinement and
enhanced Mo radiation, so we stopped that and removed all strike point sweeps
for the remainder of the run. Throughout the day we speculated that we should
break out of the old equilibrium and push the strike farther down. We did this
starting on shot 024 and by the end of the day had pushed it down to the 1st or
2nd tile row. There was no overwhelming improvement in confinement. In fact,
our highest performing shot of the day was probably 021, in the old shape.

A lot of analysis will be needed to put these results on a quantitative footing.

See the SL entries for more details, and also mlreinke's notes.

Physics Operator Summaries

Entered: Sep 7 2010 08:43:41:973AM

Author: Syunichi Shiraiwa

Successful run day.
24 plasma discharges are made from 31 attempts.
Requested equilibrium shape was obtained smoothly (See comparison in shot 20 log book entry)
Three segments in PCS are used in order to combine the requested plasma start-up and flat-top shape.
Switch from seg. 2 to seg. 3 was made at 0.4 s.
Voltage spikes were observed in coil power supplies particulary after we started changing the plasma shape in seg. 3. Please adjust seg. 2 to make the trasition smoother for future.
In the first half of run day, plasmas disrupted during current ramp-down period, which was apparently elimnated by Injection of N2 gas starting from shot 20.

Score card
24 Plasmas
3 No power shot due to DAQ system (shot 16, 17, 18)
2 Power supply commutation fault (shot 1, 4)
1 No TF (shot 27)
1 Disruption from current flat-top (shot 30)
No Fizzle

Session Leader Comments

Sep 3 2010 11:15:57:263AM Jerry Hughes P_loss at first L-H transition (not accounting for DNB power):
Shot 8: 1.5MW
Shot 7: 1.5MW
Shot 6: 1.5MW
Shot 5: 1.4MW (power ramp)

Sep 3 2010 09:09:21:887AM 1100903001 Jerry Hughes Shot 1:

Start part 1 of run plan.

Result: No plasma. EF1 commutation fault

Sep 3 2010 09:38:34:500AM 1100903002 Jerry Hughes Shot 2.

Result: Shot ran. Not much Ne, because of a programming oversight.
Got some power from D-port.
Lots of wall fueling.

Sep 3 2010 10:11:50:170AM 1100903003 Jerry Hughes Shot 3:

Shot ran, with D+E, J with some faults.
Shape match looks great, both at 0.6s (Ohmic) and at 1.0s (H-mode)
Matt is happy with Ne, Ar for now.
Steady EDA H-mode. Pedestal coverage is pretty good.

Sep 3 2010 10:09:20:813AM 1100903004 Jerry Hughes Shot 4:

Result: No plasma. Another commutation error.

Sep 3 2010 10:23:02:973AM 1100903005 Jerry Hughes Shot 5:

Had RF program changed to use only D+E until 1.2s, in a ramp to check L-H
threshold power.

Result: Got the power ramp from D+E, clear L-H at 0.885s with Picrf=0.97MW.

Next: change RF to a staircase. 250kW from [0.6,0.9]s and 750kW from [0.9,1.2]s,
with just D+E. After 1.2s exercse J.

Sep 3 2010 10:32:09:697AM 1100903006 Jerry Hughes Shot 6:

Continue RF conditioning, + L-H threshold assessment.

Result: Shot ran well. No H-modes with D+E at 250, 750kW.

Next: Raise RF power by 250kW in each step.

Sep 3 2010 10:42:20:553AM 1100903006 Jerry Hughes Brian says that surface TC 7 could be used to diagnose the heat flux profile
in low Pnet discharges if we put in a small strike point sweep across tile row
4. Maybe we can try this if we spend a lot of time in steady low-power H-mode.

Sep 3 2010 10:50:33:483AM 1100903007 Jerry Hughes Shot 7.

Result: L-H at 0.96s with 1.0MW from D+E. H-modes are marginally powered,
as one would expect.

Next: Change RF staircase levels to 0.9,1.1MW

Sep 3 2010 11:08:59:793AM 1100903008 Jerry Hughes Shot 8.

Result: Short H-mode at 0.78s with 920kW ICRF, then 3 more transitions with
1.1MW. The threshold scan would seem to bracket the threshold (ICRF) power to
between 750 and 900kW.

Next: Ramp D+E from 1 to 2.3MW by 1s, then add J-port.

Sep 3 2010 11:47:55:310AM 1100903009 Jerry Hughes Shot 9.

Start working on Step 3 of run plan (sort of)

Result: EDA H-mode. J-port is showing signs of running more cleanly.
Matt notes that a 2nd Ne pulse may be needed in the H-mode if we want to keep
the Prad up.

Sep 3 2010 11:50:49:200AM 1100903010 Jerry Hughes Shot 10.

Result: More RF early, but we get an H-L at 0.83s coincident with a D+E fault.
2nd H-mode looks ok.

Next:
Matt says we need to reduce Ar. Actually he's concerned we have residual Ar
in B-side lower, so we will turn off H-bottom for next shot and see what
happens

PO is also putting in a strike point sweep from 0.6 to 1.0s

Sep 3 2010 12:11:57:153PM 1100903011 Jerry Hughes Shot 11:

Result: Good shot. It turns out there's plenty of residual Ar in the Ne pulse to
do diagnosis. Also got the strike point sweep. Wmhd touched 138kJ.

Next: More power demand.

Sep 3 2010 12:21:03:747PM 1100903012 Jerry Hughes Shot 12.

Result: Looking pretty good. Wmhd gets to 135kJ, H98~1.

Next: We are going to try to sweep the strike point over tile row 4 and back
from 0.6 to 1.0s with flat 3MW ICRF. Then after 1.0s RF will ramp from
1.0 to 1.5s. Also, Yijun will put in some D+E in ramp down to try to ameliorate
the ramp-down.

Sep 3 2010 12:38:43:380PM 1100903013 Jerry Hughes Shot 13.

Result: Flat ICRF @3MW from 0.6s to 1.0s, then a ramp up which survives until
D-port starts faulting at 1.25s. It's interesting how performance degrades
during the uppermost part of the strike point sweep, then more or less recovers
when the strike is returned to the 4th tile row after 1s. Matt reports that the
Mo comes up during 0.8 to 1.0s, leading to the pedestal and confinement
degradation.

Next: Increase early Ne pulse by 50% and add a second, shorter pulse at
1.000s.

Sep 3 2010 12:59:36:477PM 1100903014 Jerry Hughes Shot 14.

Result. Lower Wmhd than previously. Matt says that the Mo still comes up
during the strikepoint sweep, but the total level has been halved, and
this is attributable to the added Ne.

Next: We will remove the excess strikepoint sweep up and reach our target
strikepoint sometime before 1.0s.

Sep 3 2010 01:32:49:853PM 1100903015 Jerry Hughes Shot 15.

Result: H-L back-transition at 0.9s occurs after faults on J-port. E is not too
happy either.

Next shot: Remove all strike point sweeping and ramp up ICRF from 3 to 5MW.

Sep 3 2010 01:33:20:937PM 1100903016 Jerry Hughes Shot 16:

Result: No power shot.

Sep 3 2010 02:00:30:990PM 1100903017 Jerry Hughes Shot 17:

Result: No power shot.

Sep 3 2010 02:00:51:417PM 1100903018 Jerry Hughes Shot 18:

Result: No power shot

Sep 3 2010 02:19:24:677PM 1100903019 Jerry Hughes Shot 19:

Result: EDA H-mode with continuously degrading performance. Actually,
there is still some residual strike point sweeping going on between 0.6 and 1.0s. This could be confusing things a bit.

Next: PO will make the RXL and ZXL demands flat.
RF will ramp from 3 to 4MW only.
We are going to N2, per run plan.

Sep 3 2010 02:32:51:103PM 1100903020 Jerry Hughes Shot 20.

N2 is being injected now.
Result: Prf goes from 3 to 4MW, with a few faults sprinkled in.
2 distinct H-modes. Pretty dense. Peak Wmhd = 136kJ, H98~1.

Sep 3 2010 02:39:07:623PM 1100903021 Jerry Hughes Shot 21.

For this shot, reduce N2 from 100% to 80% duty cycle.

Result: Good. Peak Wmhd=150kJ, H98~1.

Next: Reduce PG1 from 80 to 60V. Less N2.

Sep 3 2010 02:50:17:883PM 1100903022 Jerry Hughes Shot 22:

Reduced N2 puff from previous shot.

Result: Poorer performance with nominally same RF. H98~0.85 in steady portion
of H-mode.

Sep 3 2010 03:14:57:003PM 1100903023 Jerry Hughes Shot 23:

This was an attempt at N2 seeding with the puff program intermediate between
that on shots 21 and 22.

Result: EDA H-mode. Steady density, Te and neutron rate climb with ICRF.
Great time traces. Performance was still better with the higher seeding
level.

We may not get much more information here, since there's not a lot of headroom
to increase ICRF and decreasing the seeding leads to higher Mo in the H-mode.

Next: Lower strike point. (Moving on to step 5)

Sep 3 2010 03:28:40:933PM 1100903024 Jerry Hughes Shot 24:

Result: Successfully ran with N2 seeding with the strike lower by about 3cm.
Good shot. H98~1. Peak Wmhd=147kJ

Next: Attempt to elongate, and get a more typical shape.

Sep 3 2010 03:44:46:823PM 1100903025 Jerry Hughes
Shot 25:

Result: Not as good. RF has more trouble. There are some injections.

Sep 3 2010 03:53:58:720PM 1100903026 Jerry Hughes Shot 26:

Result: A cleaner shot, but confinement is worse than on shot 24. H98~0.85
Prad,main shows a corresponding increase. . .
I am skeptical that this is due to upper x-point change, since it's having a
fairly small effect on kappa.

Sep 3 2010 04:13:31:620PM 1100903027 Jerry Hughes Shot 27:

Result: No plasma, no TF.

Sep 3 2010 04:30:45:650PM 1100903028 Jerry Hughes Shot 28.

This time with feeling.

Result: H-mode density drops around 1s.
Good RF, H98 gets to one.
We are seeing a consistent change in the QCM from 0.8 to 1.4s on
most of these shots -- a frequency upshift and broadening. This seems
to correlate with less impurity influx, but poorer thermal confinement.

Sep 3 2010 04:34:45:493PM 1100903029 Jerry Hughes Shot 29:

Lowered the N2.

Result: More Mo, just as before. So, the lower strike point is not helping
with keeping the Mo down. Wmhd gets close to 150kJ by the end of the last
H-mode, but H98<0.9. Also very dense by the end.

Next: Take PG1 to 90 for more N2.

Sep 3 2010 04:44:27:390PM 1100903030 Jerry Hughes Shot 30:

Result:
Okay so maybe more N2 wasn't the answer.
Disrupted ignominiously at 0.68s

Sep 4 2010 01:27:40:537PM 1100903031 Jerry Hughes Shot 31:

Last shot, unless it's a fizzle.

Result: and it's not. Full length, good ICRF with N2.
Unfortunately the McPherson wasn't on. But everything else looks pretty good.

Physics Operator Comments

Sep 3 2010 09:08:03:963AM 1100903001 Syunichi Shiraiwa Load 1091019006 to seg. 1 and seg.2
Load 1100831004 to seg. 3

Prefill Gas 21 ms
Gas 1 in seg.3 50 V from 0.4s to 0.6 s
Gas 5 in seg.2 100V from 0.2s to 0.25 s
Set Gas 2 in seg. 3 zero
Set Gas 1 in seg. 2 zero

For smooth transition from seg. 2 to seg. 3, ZXU 1.5 cm lower in Seg.2 at 0.4 s.

Early commutation of EF1_Upper : Next repeat same setting

Sep 3 2010 09:28:39:527AM 1100903002 Syunichi Shiraiwa Ran well during the flat top. Disrupted at 1.8 s

Sep 3 2010 09:51:29:147AM 1100903003 Syunichi Shiraiwa Ne04 program starts decreasing at 1.2 s

Add DPCS_PIEZO_CHOPPER setting to control h-bot and gas1
Set output of DPCS_PIEZO_CHOPPER to ["pulse_gas3","h-bot ","pulse_gas1"]
Seg 2. H-Bot voltage request set back to 50V

Run well. Clean H-mode.
Ne and Ar are chopping now.
Still disrupt at 1.7 s.
Plasma contact to the inner wall at 0.4 s. Next clearin request will be changed

Sep 3 2010 10:04:49:200AM 1100903004 Syunichi Shiraiwa Modification to avoid early touching to the inner wall...
CLEARIN was modified to request >0 inner gap at 0.362 s when the proportional gain reaches 9
NE04 seg. 3 request was changed to be zero at 1.2 s

EF1U and EF1L commutation error due to the local inter-lock of power supply cabinet.
No change will be made on CPS for next shot

Sep 3 2010 10:21:49:210AM 1100903005 Syunichi Shiraiwa Run well.

Next : Clearin 0.4 cm at 0.4 s

Sep 3 2010 10:42:36:193AM 1100903006 Syunichi Shiraiwa Run well

Next: Clear in will be modified to avoid disruption

Sep 3 2010 10:41:50:197AM 1100903007 Syunichi Shiraiwa Clearin ramp-down was made faster by 1cm at 1.8s

Sep 3 2010 11:10:45:713AM 1100903008 Syunichi Shiraiwa ZXL changed

Run well. Disrupted at 1.7s

Sep 3 2010 11:09:45:280AM 1100903009 Syunichi Shiraiwa RCUR moves outward by 0.5cm at 1.7 s

Sep 3 2010 11:22:20:403AM 1100903010 Syunichi Shiraiwa Load seg.3 of 1100903008 in seg. 3

Sep 3 2010 11:52:56:760AM 1100903011 Syunichi Shiraiwa Seg.2 H-bot was made 30ms from 50ms
H-bot disabled
Strike point sweep from 0.6 s to 1.0 s by changing the lower X-point
ZXL by 1cm
RXL by 0.5cm

Ran Well

Sep 3 2010 12:16:30:100PM 1100903012 Syunichi Shiraiwa H-Bot Ar was filled to 1psi and disabled.
Ip ramp-down rate slowed down slightly

Ran well : next try even slower ramp-down rate

Sep 3 2010 12:33:45:473PM 1100903013 Syunichi Shiraiwa RXL and ZXL is modified to make 50% overshoot so that the diverter probe have wider scan.

Ran well. Disrupt 1.82 s. Might be vertically unstable at the last moment. Next clearin will be ramped down faster

Sep 3 2010 12:52:54:147PM 1100903014 Syunichi Shiraiwa Clearin at 1.8 s was made smaller by 0.5 cm.
Ne Puff is changed. First pulse was now 75V. The second puff was added. From 1s to 1.075s with 75V.

Ran well. Disrupted 1.72 s

Sep 3 2010 12:51:46:207PM 1100903015 Syunichi Shiraiwa Overshoot of RXL and ZXL was removed. They are set to the flattop value at 0.87s
Clearin at 1.8 s was changed in the opposite direction.

Sep 3 2010 01:53:35:700PM 1100903016 Syunichi Shiraiwa Strike point excursion was removed entirely.

No power shot.

Sep 3 2010 01:54:00:390PM 1100903017 Syunichi Shiraiwa No Power Shot

Sep 3 2010 01:54:10:900PM 1100903018 Syunichi Shiraiwa No Power Shot

Sep 3 2010 01:59:14:587PM 1100903019 Syunichi Shiraiwa Good shot.
TS data not available.

Next will enter the section 4 of SL plan.

Sep 3 2010 03:03:16:917PM 1100903020 Syunichi Shiraiwa Entering Section 4 of SL plan.
PG1 changed to 20PSI N2 and its program was set to 100V from 0.5 s to 1.4 s
RXL sweep was made all flat now.

Full length pulse

Sep 3 2010 02:35:30:200PM 1100903021 Syunichi Shiraiwa Fizzle detector changed 1.8s previously it was 2.1 s
PG1 voltage changed to 80V. (it was 100V)

Full length pulse.

Sep 3 2010 02:54:38:780PM 1100903022 Syunichi Shiraiwa PG1 voltage changed to 60V. (it was 80V)

Full length pulse

Sep 3 2010 02:54:09:500PM 1100903023 Syunichi Shiraiwa PG1 voltage changed to 70V. (it was 60V)

Sep 3 2010 03:28:11:497PM 1100903024 Syunichi Shiraiwa Entering Par5 5 of SL plan.

RXL moved inward by 5mm
ZXL lowered by 1cm

Good shot

Sep 3 2010 03:26:33:523PM 1100903025 Syunichi Shiraiwa ZXU lowed by 2cm during flat top

Sep 3 2010 03:46:12:000PM 1100903026 Syunichi Shiraiwa ZXU lowed by 2cm during flat top
Adjust clearin to eliminate the contact to the inner wall around t=0.38s

Run well. No contact.

Sep 3 2010 04:02:22:720PM 1100903027 Syunichi Shiraiwa Further move down of the strike point by 1cm
RXL moved inward by 5mm
ZXL lowered by 1cm

Adjust RCUR in Seg. 2 around t=0.35 - 0.4 s

No TF: Next shot will be repeat

Sep 3 2010 04:25:07:570PM 1100903028 Syunichi Shiraiwa Ran Well.

Sep 3 2010 04:21:13:593PM 1100903029 Syunichi Shiraiwa PG1 voltage changed to 50V. (it was 70V)

Sep 3 2010 04:41:50:923PM 1100903030 Syunichi Shiraiwa PG1 voltage changed to 90V. (it was 50V)
Disrupt at 0.7 s

Sep 3 2010 04:56:52:610PM 1100903031 Syunichi Shiraiwa Set PG1 back to shot 29.

Full length pulse. Last shot.

Engineering Operator Comments

Shot Time Type Status Comment

1 09:03:49:763AM Plasma Bad EF1U failed to commutate

2 09:16:54:880AM Plasma Ok

3 09:36:23:593AM Plasma Ok

4 09:54:45:927AM Plasma Bad EF1U&L did not commutate

5 10:10:41:750AM Plasma Ok

6 10:25:20:390AM Plasma Ok

7 10:41:05:357AM Plasma Ok

8 10:59:05:053AM Plasma Ok

9 11:14:31:183AM Plasma Ok

10 11:31:03:137AM Plasma Ok

11 11:48:42:230AM Plasma Ok

12 12:06:21:887PM Plasma Ok

13 12:23:46:777PM Plasma Ok

14 12:41:31:433PM Plasma Ok

15 12:56:53:890PM Plasma Ok

19 01:50:09:580PM Plasma Ok

20 02:16:07:293PM Plasma Ok

21 02:29:58:940PM Plasma Ok

22 02:43:06:173PM Plasma Ok

23 02:57:39:760PM Plasma Ok

24 03:12:25:843PM Plasma Ok

25 03:27:26:130PM Plasma Ok

26 03:41:09:693PM Plasma Ok

27 03:58:48:570PM Plasma Bad No TF

28 04:11:58:970PM Plasma Ok

29 04:25:08:627PM Plasma Ok

30 04:38:50:490PM Plasma Ok

31 04:52:04:373PM Plasma Ok

System Availability

Sep 3 2010 09:03:29:100AM

System Available Comment Availability
Changed Owner Description Who Can
Change
Active MHD no secured - tagged out Jun 02 2008 11:03AM (sears) Joe Snipes Active MHD Antenna sears,snipes
BES no BES system is ready for Up-to-air (Apr, 2010) Mar 31 2010 10:36AM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan
Bolometers yes 2pi (D+F) working. All midplane and off-midplane diode arrays working except WB1AX. Midplane foils calibrated and PRAD_MAIN is being filled. Divertor/Ledge foils not yet ready. Jul 15 2010 08:27AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization no 3/26/10 Bottle Removed From Cell, monitors powered down, Autodialer function bypassed Mar 26 2010 05:29PM (dekow) Jim Irby Boronization dekow,irby
CNPA no Single channel CNPA available as of 12/1707 Jun 10 2009 10:22AM (twf) Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor no Shut down. Helium dewar removed. LN2 manual valve and solenoid valves are closed and tagged. Apr 06 2010 10:51AM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard
CXRS no Wide-view CXRS system is power down and ready for up-to-air (Apr, 2010) Mar 31 2010 10:36AM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan
D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 01 2009 09:45AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe
Dalsa yes system is aligned; new calibrations (relative brightness and position) not yet implemented Jun 29 2010 10:27AM (marmar) Earl Marmar Visible Bremsstrahlung marmar
Disruption Mitigation yes operational, but turned off Nov 03 2009 04:59PM (granetz) Robert Granetz Gas Jet granetz,whyte
Divertor IR no Mar 06 2007 10:50AM Glen Wurden Divertor IR Digital Video gwurden,terry
Divertor IR Spectroscopy no Mar 06 2007 10:51AM Glen Wurden Divertor IR Spectroscopy gwurden,terry
DNB no in test mode only Nov 03 2009 05:01PM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,gung
ECDC yes Operational Jun 26 2010 09:28PM (irby) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer
FRC-ECE yes All channels working and calibrated. Jul 30 2010 08:13AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips
G-Side Ratiomatic yes Gauges are operational. Jun 28 2010 08:02PM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
Glow Discharge no Plugs for Power Supply and Controls have been unplugged and red tagged making system safe for In-Vessel Access. Apr 05 2010 11:18AM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby
GPC yes Operational. Jul 28 2009 04:23PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPC2 yes Most channels operational. Ch 5 preamp replaced 6/18. Jun 22 2010 03:03PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 01 2009 09:45AM (terry) Jim Terry Gas Puff Imaging terry,zweben
H/D yes operating normally Jun 29 2010 10:26AM (marmar) Earl Marmar H/D Ratio marmar
HEAT yes Jun 26 2010 11:19PM (dekow) Gary Dekow - Machine Heaters - burke,dekow
Hirex Jr yes Hirex-Jr has been installed Jun 28 2010 03:36PM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr yes System installed and aligned. Inverted profiles are still not available. Jul 22 2010 08:41AM (ypodpaly) John Rice High Resolution X-Ray ince,rice,ypodpaly
HXR yes Jun 28 2010 12:12PM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt
ICRF D-Antenna yes system checked out ok on 11006728. Jun 28 2010 04:57PM (ylin) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes system checked out ok on 1100628 Jun 28 2010 04:57PM (ylin) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes system checked out ok. conditioned to vacuum. Jun 28 2010 04:58PM (ylin) Steve Wukitch J-port antenna wukitch,ylin
Laser Blow-Off yes operational and tested Jul 20 2010 04:42PM (g) Martin Greenwald Impurity Injection System g,nthoward
Lower Hybrid yes LH was tested into dummy loads synced to shot. Shorts have been removed. Probe Cal. 6/29/10 evening. Jun 29 2010 03:51PM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg
Lower Hybrid Reflectometer yes 60 GHz system to detect upshifted signal Jul 28 2010 01:39PM (sgbaek) Arturo Dominguez Lower Hybrid Reflectometer dominguez,marmar,parker,sgbaek
LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha no WB4LY and LLY working but not during ICRF. WB1LY not attached due to pickup problems. LYMID attached but have profile problems. Aug 24 2010 09:17AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke
McPherson yes Spectra being collected and tree filled. Wavelength scan is broken so fixed on the Mo XXXI and XXXII lines. Jul 15 2010 08:28AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Operational. Start at reduced speed. Jun 22 2010 03:02PM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes Gauges are operational Jun 28 2010 08:02PM (labombard) Brian LaBombard Baratron pressure gauges labombard
MLP no System is in edge lab. Version 2 drivers ready to test. Needs a student to help work on it. Jul 14 2009 09:20PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard
MSE no As of 6/10/09, MSE is calibrated & ready to go. Awaiting DNB. Jun 10 2009 10:34AM (sscott) Steve Scott Motional Stark Effect jinseok,sscott
Neutrons yes All systems are on and functional Jun 29 2010 12:56PM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes PMT Neuts_hards, ssd_x01, ssd_x02, ssd_x03 Jun 26 2010 09:21PM (irby) Jim Irby X-Ray/Neutron Detectors at K-Hor irby
NINJA no Capillaries tested in-vessel. Jun 28 2010 08:08PM (labombard) Brian LaBombard NINJA gas puff labombard,terry
PCI yes Operational. AM (2 * 39.51) MHz. Jul 19 2010 05:54PM (ntsujii) Miklos Porkolab Phase Contrast Imaging arai,ennever,ntsujii,porkolab
Penning Gauges no High voltage power supplies are turned off, waiting for work at A-port horizontal to be finished. Jun 28 2010 08:07PM (labombard) Brian LaBombard Penning Ionization Gauges labombard
Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Jul 01 2009 09:46AM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe
Polarimeter no Safe for Machine Entry Sep 14 2007 12:17PM (irby) Jim Irby C-Mod Polarimeter irby
Power - Alternator Air Switch yes Jun 26 2010 11:19PM (dekow) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby
Power - PEI yes Jun 26 2010 11:19PM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby
Power - TMX yes Jun 26 2010 11:19PM (dekow) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby
Power Systems yes Jun 26 2010 11:20PM (dekow) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby
Probe Array - ISD yes Operational. Jun 28 2010 08:03PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH yes Operational. Jun 28 2010 08:03PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes F and J outer divertor probes are operational. Jun 28 2010 08:04PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard
Probe Array - UDIV yes Operational, except probe#13 Jun 28 2010 08:04PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes On 1100817xxx the system is fully connected. These are still some noise issues but the system should be in better shape than the previous week. Aug 17 2010 08:53AM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Operational. New Langmuir-Mach probe head installed. Jun 28 2010 08:05PM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes Operational. Jun 28 2010 08:05PM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP yes Both A and K units are operational. Coil polarity needs to be checked. Jun 28 2010 08:06PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
Sparker yes HV supply on, cable run to sparker at k-hor Jun 23 2010 02:41PM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin
Surface Science Station no SSS installed and leak tested, individual probes not installed Jun 28 2010 01:28PM (ochoukov) Bruce Lipschultz Radially scanning probe located on K-port blip,ochoukov
TCI yes No new CO2 detector, so still missing edge channels Jun 23 2010 02:40PM (irby) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes Operating with 2 lasers, but density is **uncalibrated** Jul 14 2010 11:54AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma
TS - Edge yes Operational Jul 14 2010 11:54AM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma
Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf
XEUS yes Operational. Raw spectra stored but not line brightness time histories are going into the tree yet. Aug 24 2010 09:17AM (mlreinke) Matt Reinke X-ray Extended Ultraviolet Spectrometer mlreinke
XTOMO yes Core system working. Edge system waiting for H-modes. Jul 01 2010 11:55AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke

Session Leader Comments
Sep 3 2010 11:15:57:263AM		Jerry Hughes	P_loss at first L-H transition (not accounting for DNB power): Shot 8: 1.5MW Shot 7: 1.5MW Shot 6: 1.5MW Shot 5: 1.4MW (power ramp)
Sep 3 2010 09:09:21:887AM	1100903001	Jerry Hughes	Shot 1: Start part 1 of run plan. Result: No plasma. EF1 commutation fault
Sep 3 2010 09:38:34:500AM	1100903002	Jerry Hughes	Shot 2. Result: Shot ran. Not much Ne, because of a programming oversight. Got some power from D-port. Lots of wall fueling.
Sep 3 2010 10:11:50:170AM	1100903003	Jerry Hughes	Shot 3: Shot ran, with D+E, J with some faults. Shape match looks great, both at 0.6s (Ohmic) and at 1.0s (H-mode) Matt is happy with Ne, Ar for now. Steady EDA H-mode. Pedestal coverage is pretty good.
Sep 3 2010 10:09:20:813AM	1100903004	Jerry Hughes	Shot 4: Result: No plasma. Another commutation error.
Sep 3 2010 10:23:02:973AM	1100903005	Jerry Hughes	Shot 5: Had RF program changed to use only D+E until 1.2s, in a ramp to check L-H threshold power. Result: Got the power ramp from D+E, clear L-H at 0.885s with Picrf=0.97MW. Next: change RF to a staircase. 250kW from [0.6,0.9]s and 750kW from [0.9,1.2]s, with just D+E. After 1.2s exercse J.
Sep 3 2010 10:32:09:697AM	1100903006	Jerry Hughes	Shot 6: Continue RF conditioning, + L-H threshold assessment. Result: Shot ran well. No H-modes with D+E at 250, 750kW. Next: Raise RF power by 250kW in each step.
Sep 3 2010 10:42:20:553AM	1100903006	Jerry Hughes	Brian says that surface TC 7 could be used to diagnose the heat flux profile in low Pnet discharges if we put in a small strike point sweep across tile row 4. Maybe we can try this if we spend a lot of time in steady low-power H-mode.
Sep 3 2010 10:50:33:483AM	1100903007	Jerry Hughes	Shot 7. Result: L-H at 0.96s with 1.0MW from D+E. H-modes are marginally powered, as one would expect. Next: Change RF staircase levels to 0.9,1.1MW
Sep 3 2010 11:08:59:793AM	1100903008	Jerry Hughes	Shot 8. Result: Short H-mode at 0.78s with 920kW ICRF, then 3 more transitions with 1.1MW. The threshold scan would seem to bracket the threshold (ICRF) power to between 750 and 900kW. Next: Ramp D+E from 1 to 2.3MW by 1s, then add J-port.
Sep 3 2010 11:47:55:310AM	1100903009	Jerry Hughes	Shot 9. Start working on Step 3 of run plan (sort of) Result: EDA H-mode. J-port is showing signs of running more cleanly. Matt notes that a 2nd Ne pulse may be needed in the H-mode if we want to keep the Prad up.
Sep 3 2010 11:50:49:200AM	1100903010	Jerry Hughes	Shot 10. Result: More RF early, but we get an H-L at 0.83s coincident with a D+E fault. 2nd H-mode looks ok. Next: Matt says we need to reduce Ar. Actually he's concerned we have residual Ar in B-side lower, so we will turn off H-bottom for next shot and see what happens PO is also putting in a strike point sweep from 0.6 to 1.0s
Sep 3 2010 12:11:57:153PM	1100903011	Jerry Hughes	Shot 11: Result: Good shot. It turns out there's plenty of residual Ar in the Ne pulse to do diagnosis. Also got the strike point sweep. Wmhd touched 138kJ. Next: More power demand.
Sep 3 2010 12:21:03:747PM	1100903012	Jerry Hughes	Shot 12. Result: Looking pretty good. Wmhd gets to 135kJ, H98~1. Next: We are going to try to sweep the strike point over tile row 4 and back from 0.6 to 1.0s with flat 3MW ICRF. Then after 1.0s RF will ramp from 1.0 to 1.5s. Also, Yijun will put in some D+E in ramp down to try to ameliorate the ramp-down.
Sep 3 2010 12:38:43:380PM	1100903013	Jerry Hughes	Shot 13. Result: Flat ICRF @3MW from 0.6s to 1.0s, then a ramp up which survives until D-port starts faulting at 1.25s. It's interesting how performance degrades during the uppermost part of the strike point sweep, then more or less recovers when the strike is returned to the 4th tile row after 1s. Matt reports that the Mo comes up during 0.8 to 1.0s, leading to the pedestal and confinement degradation. Next: Increase early Ne pulse by 50% and add a second, shorter pulse at 1.000s.
Sep 3 2010 12:59:36:477PM	1100903014	Jerry Hughes	Shot 14. Result. Lower Wmhd than previously. Matt says that the Mo still comes up during the strikepoint sweep, but the total level has been halved, and this is attributable to the added Ne. Next: We will remove the excess strikepoint sweep up and reach our target strikepoint sometime before 1.0s.
Sep 3 2010 01:32:49:853PM	1100903015	Jerry Hughes	Shot 15. Result: H-L back-transition at 0.9s occurs after faults on J-port. E is not too happy either. Next shot: Remove all strike point sweeping and ramp up ICRF from 3 to 5MW.
Sep 3 2010 01:33:20:937PM	1100903016	Jerry Hughes	Shot 16: Result: No power shot.
Sep 3 2010 02:00:30:990PM	1100903017	Jerry Hughes	Shot 17: Result: No power shot.
Sep 3 2010 02:00:51:417PM	1100903018	Jerry Hughes	Shot 18: Result: No power shot
Sep 3 2010 02:19:24:677PM	1100903019	Jerry Hughes	Shot 19: Result: EDA H-mode with continuously degrading performance. Actually, there is still some residual strike point sweeping going on between 0.6 and 1.0s. This could be confusing things a bit. Next: PO will make the RXL and ZXL demands flat. RF will ramp from 3 to 4MW only. We are going to N2, per run plan.
Sep 3 2010 02:32:51:103PM	1100903020	Jerry Hughes	Shot 20. N2 is being injected now. Result: Prf goes from 3 to 4MW, with a few faults sprinkled in. 2 distinct H-modes. Pretty dense. Peak Wmhd = 136kJ, H98~1.
Sep 3 2010 02:39:07:623PM	1100903021	Jerry Hughes	Shot 21. For this shot, reduce N2 from 100% to 80% duty cycle. Result: Good. Peak Wmhd=150kJ, H98~1. Next: Reduce PG1 from 80 to 60V. Less N2.
Sep 3 2010 02:50:17:883PM	1100903022	Jerry Hughes	Shot 22: Reduced N2 puff from previous shot. Result: Poorer performance with nominally same RF. H98~0.85 in steady portion of H-mode.
Sep 3 2010 03:14:57:003PM	1100903023	Jerry Hughes	Shot 23: This was an attempt at N2 seeding with the puff program intermediate between that on shots 21 and 22. Result: EDA H-mode. Steady density, Te and neutron rate climb with ICRF. Great time traces. Performance was still better with the higher seeding level. We may not get much more information here, since there's not a lot of headroom to increase ICRF and decreasing the seeding leads to higher Mo in the H-mode. Next: Lower strike point. (Moving on to step 5)
Sep 3 2010 03:28:40:933PM	1100903024	Jerry Hughes	Shot 24: Result: Successfully ran with N2 seeding with the strike lower by about 3cm. Good shot. H98~1. Peak Wmhd=147kJ Next: Attempt to elongate, and get a more typical shape.
Sep 3 2010 03:44:46:823PM	1100903025	Jerry Hughes	Shot 25: Result: Not as good. RF has more trouble. There are some injections.
Sep 3 2010 03:53:58:720PM	1100903026	Jerry Hughes	Shot 26: Result: A cleaner shot, but confinement is worse than on shot 24. H98~0.85 Prad,main shows a corresponding increase. . . I am skeptical that this is due to upper x-point change, since it's having a fairly small effect on kappa.
Sep 3 2010 04:13:31:620PM	1100903027	Jerry Hughes	Shot 27: Result: No plasma, no TF.
Sep 3 2010 04:30:45:650PM	1100903028	Jerry Hughes	Shot 28. This time with feeling. Result: H-mode density drops around 1s. Good RF, H98 gets to one. We are seeing a consistent change in the QCM from 0.8 to 1.4s on most of these shots -- a frequency upshift and broadening. This seems to correlate with less impurity influx, but poorer thermal confinement.
Sep 3 2010 04:34:45:493PM	1100903029	Jerry Hughes	Shot 29: Lowered the N2. Result: More Mo, just as before. So, the lower strike point is not helping with keeping the Mo down. Wmhd gets close to 150kJ by the end of the last H-mode, but H98<0.9. Also very dense by the end. Next: Take PG1 to 90 for more N2.
Sep 3 2010 04:44:27:390PM	1100903030	Jerry Hughes	Shot 30: Result: Okay so maybe more N2 wasn't the answer. Disrupted ignominiously at 0.68s
Sep 4 2010 01:27:40:537PM	1100903031	Jerry Hughes	Shot 31: Last shot, unless it's a fizzle. Result: and it's not. Full length, good ICRF with N2. Unfortunately the McPherson wasn't on. But everything else looks pretty good.

Physics Operator Comments
Sep 3 2010 09:08:03:963AM	1100903001	Syunichi Shiraiwa	Load 1091019006 to seg. 1 and seg.2 Load 1100831004 to seg. 3 Prefill Gas 21 ms Gas 1 in seg.3 50 V from 0.4s to 0.6 s Gas 5 in seg.2 100V from 0.2s to 0.25 s Set Gas 2 in seg. 3 zero Set Gas 1 in seg. 2 zero For smooth transition from seg. 2 to seg. 3, ZXU 1.5 cm lower in Seg.2 at 0.4 s. Early commutation of EF1_Upper : Next repeat same setting
Sep 3 2010 09:28:39:527AM	1100903002	Syunichi Shiraiwa	Ran well during the flat top. Disrupted at 1.8 s
Sep 3 2010 09:51:29:147AM	1100903003	Syunichi Shiraiwa	Ne04 program starts decreasing at 1.2 s Add DPCS_PIEZO_CHOPPER setting to control h-bot and gas1 Set output of DPCS_PIEZO_CHOPPER to ["pulse_gas3","h-bot ","pulse_gas1"] Seg 2. H-Bot voltage request set back to 50V Run well. Clean H-mode. Ne and Ar are chopping now. Still disrupt at 1.7 s. Plasma contact to the inner wall at 0.4 s. Next clearin request will be changed
Sep 3 2010 10:04:49:200AM	1100903004	Syunichi Shiraiwa	Modification to avoid early touching to the inner wall... CLEARIN was modified to request >0 inner gap at 0.362 s when the proportional gain reaches 9 NE04 seg. 3 request was changed to be zero at 1.2 s EF1U and EF1L commutation error due to the local inter-lock of power supply cabinet. No change will be made on CPS for next shot
Sep 3 2010 10:21:49:210AM	1100903005	Syunichi Shiraiwa	Run well. Next : Clearin 0.4 cm at 0.4 s
Sep 3 2010 10:42:36:193AM	1100903006	Syunichi Shiraiwa	Run well Next: Clear in will be modified to avoid disruption
Sep 3 2010 10:41:50:197AM	1100903007	Syunichi Shiraiwa	Clearin ramp-down was made faster by 1cm at 1.8s
Sep 3 2010 11:10:45:713AM	1100903008	Syunichi Shiraiwa	ZXL changed Run well. Disrupted at 1.7s
Sep 3 2010 11:09:45:280AM	1100903009	Syunichi Shiraiwa	RCUR moves outward by 0.5cm at 1.7 s
Sep 3 2010 11:22:20:403AM	1100903010	Syunichi Shiraiwa	Load seg.3 of 1100903008 in seg. 3
Sep 3 2010 11:52:56:760AM	1100903011	Syunichi Shiraiwa	Seg.2 H-bot was made 30ms from 50ms H-bot disabled Strike point sweep from 0.6 s to 1.0 s by changing the lower X-point ZXL by 1cm RXL by 0.5cm Ran Well
Sep 3 2010 12:16:30:100PM	1100903012	Syunichi Shiraiwa	H-Bot Ar was filled to 1psi and disabled. Ip ramp-down rate slowed down slightly Ran well : next try even slower ramp-down rate
Sep 3 2010 12:33:45:473PM	1100903013	Syunichi Shiraiwa	RXL and ZXL is modified to make 50% overshoot so that the diverter probe have wider scan. Ran well. Disrupt 1.82 s. Might be vertically unstable at the last moment. Next clearin will be ramped down faster
Sep 3 2010 12:52:54:147PM	1100903014	Syunichi Shiraiwa	Clearin at 1.8 s was made smaller by 0.5 cm. Ne Puff is changed. First pulse was now 75V. The second puff was added. From 1s to 1.075s with 75V. Ran well. Disrupted 1.72 s
Sep 3 2010 12:51:46:207PM	1100903015	Syunichi Shiraiwa	Overshoot of RXL and ZXL was removed. They are set to the flattop value at 0.87s Clearin at 1.8 s was changed in the opposite direction.
Sep 3 2010 01:53:35:700PM	1100903016	Syunichi Shiraiwa	Strike point excursion was removed entirely. No power shot.
Sep 3 2010 01:54:00:390PM	1100903017	Syunichi Shiraiwa	No Power Shot
Sep 3 2010 01:54:10:900PM	1100903018	Syunichi Shiraiwa	No Power Shot
Sep 3 2010 01:59:14:587PM	1100903019	Syunichi Shiraiwa	Good shot. TS data not available. Next will enter the section 4 of SL plan.
Sep 3 2010 03:03:16:917PM	1100903020	Syunichi Shiraiwa	Entering Section 4 of SL plan. PG1 changed to 20PSI N2 and its program was set to 100V from 0.5 s to 1.4 s RXL sweep was made all flat now. Full length pulse
Sep 3 2010 02:35:30:200PM	1100903021	Syunichi Shiraiwa	Fizzle detector changed 1.8s previously it was 2.1 s PG1 voltage changed to 80V. (it was 100V) Full length pulse.
Sep 3 2010 02:54:38:780PM	1100903022	Syunichi Shiraiwa	PG1 voltage changed to 60V. (it was 80V) Full length pulse
Sep 3 2010 02:54:09:500PM	1100903023	Syunichi Shiraiwa	PG1 voltage changed to 70V. (it was 60V)
Sep 3 2010 03:28:11:497PM	1100903024	Syunichi Shiraiwa	Entering Par5 5 of SL plan. RXL moved inward by 5mm ZXL lowered by 1cm Good shot
Sep 3 2010 03:26:33:523PM	1100903025	Syunichi Shiraiwa	ZXU lowed by 2cm during flat top
Sep 3 2010 03:46:12:000PM	1100903026	Syunichi Shiraiwa	ZXU lowed by 2cm during flat top Adjust clearin to eliminate the contact to the inner wall around t=0.38s Run well. No contact.
Sep 3 2010 04:02:22:720PM	1100903027	Syunichi Shiraiwa	Further move down of the strike point by 1cm RXL moved inward by 5mm ZXL lowered by 1cm Adjust RCUR in Seg. 2 around t=0.35 - 0.4 s No TF: Next shot will be repeat
Sep 3 2010 04:25:07:570PM	1100903028	Syunichi Shiraiwa	Ran Well.
Sep 3 2010 04:21:13:593PM	1100903029	Syunichi Shiraiwa	PG1 voltage changed to 50V. (it was 70V)
Sep 3 2010 04:41:50:923PM	1100903030	Syunichi Shiraiwa	PG1 voltage changed to 90V. (it was 50V) Disrupt at 0.7 s
Sep 3 2010 04:56:52:610PM	1100903031	Syunichi Shiraiwa	Set PG1 back to shot 29. Full length pulse. Last shot.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:03:49:763AM	Plasma	Bad	EF1U failed to commutate
2	09:16:54:880AM	Plasma	Ok
3	09:36:23:593AM	Plasma	Ok
4	09:54:45:927AM	Plasma	Bad	EF1U&L did not commutate
5	10:10:41:750AM	Plasma	Ok
6	10:25:20:390AM	Plasma	Ok
7	10:41:05:357AM	Plasma	Ok
8	10:59:05:053AM	Plasma	Ok
9	11:14:31:183AM	Plasma	Ok
10	11:31:03:137AM	Plasma	Ok
11	11:48:42:230AM	Plasma	Ok
12	12:06:21:887PM	Plasma	Ok
13	12:23:46:777PM	Plasma	Ok
14	12:41:31:433PM	Plasma	Ok
15	12:56:53:890PM	Plasma	Ok
19	01:50:09:580PM	Plasma	Ok
20	02:16:07:293PM	Plasma	Ok
21	02:29:58:940PM	Plasma	Ok
22	02:43:06:173PM	Plasma	Ok
23	02:57:39:760PM	Plasma	Ok
24	03:12:25:843PM	Plasma	Ok
25	03:27:26:130PM	Plasma	Ok
26	03:41:09:693PM	Plasma	Ok
27	03:58:48:570PM	Plasma	Bad	No TF
28	04:11:58:970PM	Plasma	Ok
29	04:25:08:627PM	Plasma	Ok
30	04:38:50:490PM	Plasma	Ok
31	04:52:04:373PM	Plasma	Ok