Alcator C-Mod Run 1080222 Information

Miniproposals

Miniproposal: 429

Date Filed: 7/25/2005

Title: SOL turbulence in limited plasmas

First Author: Stewart Zweben

Session Leader: Jim Terry (shots 27-32)

Miniproposal: 495a

Date Filed: 6/22/2007

Title: Alfvén Cascades studies with ICRH and LHCD

First Author: Eric Edlund

Session Leader: Eric Edlund (shots 1-26)

Operators
Session leader(s):	Eric Edlund,Jim Terry
Physics operator(s):	Jim Irby
Engineering operator(s):	Bill Parkin,Bill Byford,Gary Dekow

Engineering Operator Run Comment
Alfven Cascade studies with ICRH and LHCD Eric Edlund Jim Irby

Session Leader Plans

Entered: Feb 21 2008 03:46:30:653PM

Author: Eric Edlund

MP #495a
Alfven Cascade studies with ICRH and LHCD

This is a continuation of experiments formerly run on 1070823.

We will be working within the revised goals of first establishing RSAE activity similar to that seen on 1040406 (the last really good set of results). Only once this has been accomplished will we begin to apply early LHCD to look for modifications of the early current density distribution.

To do this we will be looking at the variation of 3 main parameters:
1) initial ICRF timing
2) plasma position (inner wall vs. nose limited)
3) early dI/dt

A revised shot sequence plan is included below.

----------------------------
SETUP:

ECDC and bake at 60 C overnight.

equilibrium target: 1070823019

ICRF: all transmitters run-on by 8:30am
initial power waveform:
1)turn-on at 0.100 seconds
2)ramp to 1.5 MW by 0.125 seconds
3)flattop to 0.700 seconds
4)turn-off at 0.700 seconds

LH: 90 degree ideal phasing, normal field, current direction
initial power waveform:
no power initially, LH to be used later

Diagnostics:
1)PCI and magnetics digitized at 10 Mhz
2)Thomson and ECE required
3)cNPA requested

----------------------------
Shot Sequence:

001: Start with reproducing shot 1070823019 (without LH).

002-005: increase ICRF power to 3.0 MW. Move start time to 0.075 seconds.

006-009: move from inner-wall limited to nose-limited geometry

010-015: increase initial dI/dt as much as possible

016-022: Apply LHCD in optimized target plasma, starting with 90 degree phasing.

last part of run to be taken over by Jim Terry for

Entered: Feb 22 2008 10:27:33:940AM

Author: Jim Terry

MP#429 (...continued)
Session leaders: J. Terry
Physics operator: J. Irby

SOL turbulence w/ limited plasmas:
These few shots are being run to obtain turbulence data
from the outer midplane 2D view and the hi-shear view
simultaneously. The last half-run day given to this
experiment was 1070801, at which time the outer
midplane 2D view was not operational. Also, the GEM
turbulence code now has been run to simulate the previous
C-Mod run data, so there are specific predictions that
can be tested with data from the outer midplane view.

Setup:
NINJA filled with 10 PSI D2 for GPI ;
capillaries AB-lim and K-bolo will be used;
NINJA trigger at 0.85 so that gas hits at 1.0 s.

Load shot 1070801015, i.e. Bt=5.4T, Ip=0.8 MA,
NL_04=7x1019 m-2, inner wall limited,
kappa=1.2, outer gap=3.6 cm.
(NINJA puff will raise the density to ~9x1019 m-2.)
2-3 good shots

Load shot 1070801035, i.e. Bt ramped to 2.8 T at 1.0 sec,
Ip ramped to 0.4 MA, NL_04=4.3x1019 m-2, inner wall limited,
kappa=1.2, outer gap=3.6 cm.
2-3 good shots

Physics Operators Plans

Entered: Feb 21 2008 09:08:48:647AM

Author: Jim Irby

-----------------
Engineering Setup
-----------------

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

Power systems as on: update soon

Acoil: +Dtop -Dbot -Jtop +Jbot (standard) Hybrid Enabled

Gas setup:

Fill B-Top with 6 psi D2 Hybrid enabled (PG4)
fill B-side lower with 1 psi Ar Hybrid DISABLED (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3)
fill NINJA with 10 psi D2 DISABLED

Enable gatevalves and shutters: ECE, VUV, DNB, Z-bolo

Torvac gatevalve toggle (yes/no): no

Boronization(yes/no): no
Overnight ECDC (yes/no): yes
ICRF(yes/no): yes
LH(yes/no): yes
DNB(yes/no): no
Cryopump (yes/no): maybe

Vessel temperature: 35/35/35

------------------------------
ECDC Parameters (if requested)
------------------------------
gas and pressure: D2 at 2e-4 Torr
sweep: 44/45/103 cm
scan: 20/120 s

Session Leader Summaries

Entered: Feb 22 2008 05:09:35:563PM

Author: Eric Edlund

MP #495a - Alfven Cascades with early ICRF and LHCD

We had 26 shots devoted to development of discharges with RSAEs during the current ramp. Manny of the eariler shots resulted in disruptions, this seemed to be mitigated by increasing the flattop target density. We spent the entire day trying to excite RSAEs with ICRF alone and never got to the LHCD portion of the experiments.

We attempted to reproduce the strong RSAE activity last seen on 1040406 (also 1030709), especially shot 018 from 2004. The 2004 geometry was strongly shaped early to be nose-limited and pulled away from the inner wall. Multiple attempts to reproduce this configuration were made though with limited success. Shots 1080222010, 024 and 026 showed the greatest RSAE activity, though still far below that observed in 2004.

parameters that were well matched: Bt, Ip, nel, Prf
parameters not so well mathced: D_alpha, right gap, *left gap*

We tried numerous times to pull the plasma off the inner wall earlier, EFIT shows a gap forming around 140ms in 2004 compared to 240ms in today's runs. We are left puzzled as to what exactly is the key ingredient for the excitation of RSAEs. Perhaps it all depends on getting the plasma off the inner wall?? Impurity measurements from Zeff suggest cleaner plasmas today, though the radiated power can be somewhat higher in the ramp-up phase.

Entered: Feb 25 2008 11:20:51:340AM

Author: Jim Terry

We essentially achieved the discharges we
wanted, although the density was higher than
in the previous 5.4 T cases from 1070801 and
simulated by the GEM code, e.g. NL_04 was
~8.5e19 instead of 7.0e19 m-2. (We tried but
we couldn't get the density down.) The conditions for
the Bt=2.8 T case were as desired, i.e. the same as for the
shot simulated by the GEM code.

We got fast camera data from the outboard midplane
view on shots 1080222028-031. For shot 027 the
signal was too weak. In general the camera signals
were weak because the fiber bundles are browning,
so I had to do what I could to increase the signals,
e.g. increase the camera integration time to 8 usec for shots
028 and 029 and increase the puff plenum pressure
from ~490 Torr on shots 027-029 to 695 Torr on shots
030 and 031. Because of the increased puff, I turned the
puff at the lower Xpt OFF, so as not to increase the
density too much.

The best shots for 2D imaging at the outboard midplane
are:
*1080222029 - 5.4T, 0.8 MA, NL_04=8.7e19 -> 10.0e19 during data window; 8 usec integration time; 90.9 kHz frame rate; 6.3 T-l puffed
1080222030 - 5.4T, 0.8 MA, NL_04=8.6e19 -> 9.3e19 during data window; 4 usec integration time; 149 kHz frame rate; 6.3 T-l puffed
1080222031 - 2.9T, 0.4 MA, NL_04=4.1e19 -> 4.9e19 during data window; 4 usec integration time; 149 kHz frame rate; 6.3 T-l puffed
S. Zweben will have to evaluate whether these images are "good enough".

There is still the problem on the phantom camera (which in this run
was looking at the outboard midplane view) that a significant
brightness is needed to get a non-zero "count", i.e. a linear extension
of the brightness (x) vs counts (y) has a y-intercept that is significantly
less than 0.

A summary of the shots follows:
shot Bt pre-puff int. time frame rate max sig. AB lim puff
NL_04(e19) (usec) (kHz) (counts) (Torr-l)
1080222027 5.4 8.4 4 142 300 pix > 200 4.4
1080222028 5.4 8.7 8 90.9 ~600 pix > 1000 4.4
1080222029 5.4 8.7 8 90.9 215000 pix > 1000 6.3
1080222030 5.4 8.6 4 149 600 pix > 1000 6.3
1080222031 2.9 4.0 4 149 600 pix > 1000 6.3

Physics Operator Summaries

Entered: Feb 22 2008 05:24:33:783PM

Author: Jim Irby

MP495a Alfven cascade studies w/ICRF & LHCD -- Edlund
MP429 SOL turbulence in limited plasmas -- Terry

Most of the run today was devoted to mp495a. This run was very difficult from the standpoint of getting fast current rises, shaping, and disruptions related to the application of very early icrf at the 3 MW level. A lot of time was spent (with a great deal of help from Steve Wolfe) in getting the required plasma shape (1040406018). Since we could not simply load such an old shot, a lot of by hand tweaking was required. Prepuff gas was adjusted trying to get the early current rise as fast as possible.

Around 16:00 we switched over to mp429 without too much trouble. A tweak in rcur was required to increase the outer gap a couple of mm. However, the density rose considered more early in the discharge than it did on the reference shot (1070801015), I assume because of the strongly inner wall limited plasma.

The machine ran extremely well today from the standpoint of startup. We had two fizzles. One, shot 03, was caused by the physop forgetting to reduce the gas following a disruption. The last shot of the day, which was a DPCS repeat of the previous shot, fizzled around 20 ms when the plasma hit the wall (ciii injection).

tests 01
no pwr 19
fizzle 03,32
plasma 02,04,05,06,07,08,09,10,11,12,
13,14,15,16,17,18,19,20,21,22,
23,24,25,26,28,29,30,31

Session Leader Comments

Feb 22 2008 09:26:41:903AM 1080222002 Eric Edlund P_rf ~ 0.8 MW in ramp
disruption at about 0.45 seconds
no RSAE activity seen by PCI

Feb 22 2008 09:51:57:963AM 1080222003 Eric Edlund fizzle

Feb 22 2008 09:58:05:813AM 1080222004 Eric Edlund single TAE mode around 0.16s
no RSAEs
repeat, try for better RF matching

Feb 22 2008 10:11:54:097AM 1080222005 Eric Edlund beginning traces of RSAEs near 0.15s
lower triang. near 0.28, target 0.24

Feb 22 2008 10:33:02:260AM 1080222006 Eric Edlund nothing on PCI
no data from board 1

try no power from ICRF to test control systems

Feb 22 2008 11:02:40:937AM 1080222007 Eric Edlund no RF, no disruption
try to increase current ramp rate and try again with RF

Feb 22 2008 11:11:05:793AM 1080222008 Eric Edlund starting to see traces of RSAEs
current ramp rate similar to 2004
RF moved to start at 80ms

try to reconfigure to 2004 settings
turn off RF and test equilibrium on next shot

Feb 22 2008 11:49:50:993AM 1080222010 Eric Edlund few faint RSAEs
clean RF power from 100ms on
disruption at 0.45s

try to move towards nose limited geometry

Feb 22 2008 12:10:37:813PM 1080222011 Eric Edlund no RSAEs

increase flattop density to try to mitigate disruptions
try to increase clearin
increae ICRF to 4MW

Feb 22 2008 12:31:38:307PM 1080222013 Eric Edlund no RSAEs, 4MW ICRF
abrupt excitation of TAEs suggests absence of reversed shear

increase ramp rate and try again

Feb 22 2008 01:05:14:673PM 1080222014 Eric Edlund no RSAEs, weak TAEs

Feb 22 2008 01:04:47:203PM 1080222015 Eric Edlund no RSAEs, early ICRF trip, D&E only
stronger TAEs

ramp rate matching 2004 more closely

try to increase flattop current and try again

Feb 22 2008 01:25:38:883PM 1080222016 Eric Edlund no RSAEs, some TAEs

density higher now
faster current ramp, flattop current target of 1.1MA

try to lower density and try again

Feb 22 2008 01:28:52:263PM 1080222017 Eric Edlund injection during current rise
density came down

try again

Feb 22 2008 01:52:57:120PM 1080222018 Eric Edlund good RF, 4MW
density still a bit high, ~0.75 at 0.150s

move to 5.2T, put J near axis

Feb 22 2008 02:02:56:910PM 1080222019 Eric Edlund no power shot

Feb 22 2008 02:18:15:147PM 1080222020 Eric Edlund no RF
carbon injection near 0.1s

repeat

Feb 22 2008 02:39:53:297PM 1080222021 Eric Edlund early injection
back off to 5.3T
try again

Feb 22 2008 03:50:58:177PM 1080222022 Eric Edlund 5.6T
4MW ICRF
no RSAEs

Feb 22 2008 03:17:14:357PM 1080222024 Eric Edlund incrased clearin
fainter traces of RSAEs

push clearin again
try to lower density
keep ICRF at 3MW

Feb 22 2008 03:32:02:343PM 1080222025 Eric Edlund no RSAEs

repeat, back off on clearin

Feb 22 2008 03:42:56:840PM 1080222026 Eric Edlund one faint RSAE

density at the 2004 level
ran with J&E only

Feb 22 2008 05:09:02:423PM 1080222027 Jim Terry J. Terry took over as SL starting on this shot.

Good shot, though density is too high, 8.2e19 instead of 7.0.
outer gap is 3.3 cm instead of 3.6 cm

nothing on either of the phantom cameras'
images

diode views 10 and 11 saturated for part of the puff, others are good.

NINJA setup
489 Torr D2 pressure
AB-Lim and K-bolo capillaries enabled
to fire at 0.88 s for 0.15 s duration
Gas hits at 1.008 s.
8.6 T-l puffed.

phantom setup:
phantom (slave) trigger set to 1.0 s; 4 usec integration time
phantom2 (master) trigger set to 1.0 s; 142 kHz frame rate;
5 usec integration time

fast-diode setup
for shot 1080222027 the fast-diode data window was from 1.000 to 1.524 sec
diode # trans fiber # view F/no
1 GPI #3 OUTER SOL 36 F/1.4
2 GPI #2 OUTER SOL 22 F/1.4
3 GPI #1 OUTER SOL 21 F/1.4
4 GPI #4 OUTER SOL 23 F/4.0
5 GPI #5 OUTER SOL 10 F/2.8
6 #39 OUTER SOL 9 F/4.0
7 #40 OUTER SOL 7 F/1.4
8 #41 OUTER SOL 11 F/4.0
9 #42 OUTER SOL 12 F/5.6
10 #43 OUTER SOL 13 F/5.6
11 #44 OUTER SOL 14 F/8.0
12 #45 OUTER SOL 6 F/1.4
13 #46 OUTER SOL 29 F/8.0
14 #47 OUTER SOL 31 F/1.4
15 #48 OUTER SOL 32 F/1.4
16 #49 OUTER SOL 33 F/2.0
17 #50 OUTER SOL 34 F/2.8
18 #51 OUTER SOL 35 F/2.8
19 #52 OUTER SOL 3 F/1.4
20 #20 OUTER SOL 37 F/4.0
21 #21 OUTER SOL 38 F/2.8
22 #22 OUTER SOL 39 F/2.8
23 #26 OUTER SOL 40 F/2.0

Feb 22 2008 05:10:21:457PM 1080222028 Jim Terry Good shot, though density is too high, 8.5e19 instead of 7.0.
outer gap is now 3.5 cm - OK

weak signal on the phantom (OUTER MIDPLANE)

diode views 10 and 11 saturated for part of the puff, others are good.

NINJA setup
489 Torr D2 pressure
AB-Lim and K-bolo capillaries enabled
to fire at 0.88 s for 0.15 s duration
Gas hits at 1.008 s
8.7 Torr-l puffed

phantom setup:
phantom (slave) trigger set to 1.0 s; 8 usec integration time
phantom2 (master) trigger set to 1.0 s; 90.9 kHz frame rate;
9 usec integration time

Oct 14 2008 02:55:08:603PM 1080222029 Jim Terry Good shot, though density is too high, 8.5e19 instead of 7.0.
outer gap is now 3.5 cm - OK

Increase NINJA pressure to 15 psi, but turn K-bolo capillary off

max signal on the phantom (OUTER MIDPLANE) is 1200 counts.

diode views 33,34,35,38, 39, 40 ,23, 9, 10 and 11 are
saturated for part of the puff, others are good.

NINJA setup
695 Torr D2 pressure
only AB-Lim capillary enabled
to fire at 0.88 s for 0.12 s duration
gas hits before 1.0 sec.

phantom setup:
phantom (slave) trigger set to 1.0 s; 8 usec integration time
phantom2 (master) trigger set to 1.0 s; 90.9 kHz frame rate;
9 usec integration time

ANALYSIS:
here is the average intensity assuming the phantom response is linear (which it isn't)

here is the average intensity assuming the phantom response is been made linear based on the bench calibration

here is the profile of the average intensity at Z=-3.75 assuming the phantom response
is linear (which it isn't). The dashed line is the sepx location; the solid line is the radius of the
nozzle.

here is the profile of the average intensity at Z=-3.75 removing the phantom's
non-linear response. The dashed line is the sepx location; the solid line is the radius of the
nozzle.

Here is the correlation between the diode signal from view 36 and the phantom pixels
(after removing the non-linearity and summing over a 3 mm sq spot) yielding
the large cross-correlation:

Here is the contour plot of the correlations between the diode signal from
FD view 36 and the phantom pixels (after removing the non-linearity and
summing over a 3 mm sq spot). Note that the contuors are "strectched along
the flux surfaces:

Here is the correlation between the diode signal from view 12 and the phantom pixels
(after removing the non-linearity and summing over a 3 mm sq spot) yielding
the large cross-correlation:

Here is the correlation between the diode signal from view 14 and the phantom pixels
(after removing the non-linearity and summing over a 3 mm sq spot) yielding
the large cross-correlation:

Feb 22 2008 04:50:20:870PM 1080222030 Jim Terry Good shot, though density is too high, 8.7e19 instead of 7.0e19.
outer gap is now 3.5 cm - OK

max signal on the phantom (OUTER MIDPLANE) is ~1000 counts.

diode views 33,34,35,38,39,40,23,9,10 and 11 are
saturated for part of the puff, others are good.

NINJA setup
695 Torr D2 pressure
only AB-Lim capillary enabled
to fire at 0.87 s for 0.12 s duration
gas hits before 1.0 sec.
6.2 Torr-l puffed.

phantom setup:
phantom trigger set to 1.0 s; 148 kHz; 4.5 usec integration time
phantom2 - not triggered

Feb 22 2008 05:04:14:650PM 1080222031 Jim Terry Now go to Bt=2.8 T (ramped); Ip=0.4 MA
Good shot

max signal on the phantom (OUTER MIDPLANE) is ~1000 counts.

diode views 33,34,35,38,39,40,23,9,10 and 11 are
saturated for part of the puff, others are good.

NINJA setup
694 Torr D2 pressure
only AB-Lim capillary enabled
to fire at 0.89 s for 0.12 s duration
gas hits at 0.977 s
6.2 Torr-l puffed.

phantom setup:
phantom trigger set to 1.0 s; 148 kHz; 4.5 usec integration time
phantom2 - not triggered

Feb 22 2008 05:08:32:420PM 1080222032 Jim Terry Increase NINJA pressure to 18 PSI
fizzle

NINJA setup
846 Torr D2 pressure
only AB-Lim capillary enabled
to fire at 0.89 s for 0.12 s duration

phantom setup:
phantom trigger set to 1.0 s; 148 kHz; 4.5 usec integration time
phantom2 - not triggered

Physics Operator Comments

Feb 22 2008 09:03:24:673AM Jim Irby loaded seg2 of 1070823019 into seg2 per sl --- 800 kA SNL, 8e19/m^2
recalculated all magnetics predictors for seg 2.
loaded

noticed that yesterday's startup was not acceptable at all for today.

loaded seg1 from 1080215020 into seg1 --- good startup from last Friday
loaded

prepuff to 25 ms

Feb 22 2008 09:27:00:277AM 1080222002 Jim Irby plasma for 0.467 s

found engineering setup was for the wrong shot --- a-coils didn't turn on until 0.3 s instead of 0.2 s. ---- 1070823019 has now been loaded

Feb 22 2008 09:36:00:180AM 1080222003 Jim Irby fizzle --- should have changed the prepuff

Feb 22 2008 09:54:51:013AM 1080222004 Jim Irby prepuff from 25 to 23 ms
loaded

plasma for 0.385 s

Feb 22 2008 10:15:37:897AM 1080222005 Jim Irby recalculated rcur in seg 2 --- probably not the problem
loaded

plasma for 0.384 s

Feb 22 2008 10:28:05:350AM 1080222006 Jim Irby clearin from 0.01 to 0.005 m
loaded

plasma for 0.544 s --- better match to 1070823019 in inner gap

vertical stability better

Feb 22 2008 11:00:30:020AM 1080222007 Jim Irby no ICRF this time to see if we can get a full shot
prepuff from 23 to 21 ms
loaded

plasma into rampdown

Feb 22 2008 11:13:23:513AM 1080222008 Jim Irby prepuff from 21 to 20 ms --- may get a little faster Ip ramprate

Steve Wolfe is trying to figure out how to run shot for 1040406

short plasma --- rf I assume

Ip ramp rate was a little faster

Feb 22 2008 11:37:59:290AM 1080222009 Jim Irby Per Steve's direction we have modified all of the following:
ZCUR
Clearin timing
RXL
ZXL
ZXU
loaded

plasma --- disruption

Feb 22 2008 11:49:19:523AM 1080222010 Jim Irby changed clearin and RXL to get closer to 1040406018
loaded

short plasma, 460 ms --- vertically unstable --- pulled PF breaker

Feb 22 2008 12:09:17:827PM 1080222011 Jim Irby Ip dropped to 600 kA after 200 ms
loaded

RXL and ZXL tweaked again
CLEARIN ramp started earlier
loaded

plasma for 0.36 s ---

Feb 22 2008 12:21:17:840PM 1080222012 Jim Irby clearin up to 0.015 from 0.010 early
nl_04 to 1.2e20/m^2 after 0.3 ms
loaded

plasma for 1.02 s

Feb 22 2008 12:35:59:420PM 1080222013 Jim Irby nl_04 request to 1.5e20 after 0.3 s

plasma for 0.44 s

Feb 22 2008 12:53:14:673PM 1080222014 Jim Irby prepuff from 20 to 18 ms
reduced clearin late back down to 0.01
dropped density request after 0.3 s

plasma into rampdown

Feb 22 2008 01:04:28:843PM 1080222015 Jim Irby Ip ramp rate increased slightly at 0.1 s --- 600 to 650 request
Just D&E antennas

plasma into rampdown -- dIp/dt a little better

Feb 22 2008 01:21:41:083PM 1080222016 Jim Irby Ip request increased to 1.1 MA from 100 ms to 200 ms (still back down after 200)

plasma to 0.376 s ---- got the Ip rise

density rising before 100 ms

Feb 22 2008 01:35:03:253PM 1080222017 Jim Irby nl_04 request between 100 and 200 ms reduced
programmed gas before 100 ms reduced
Ip drop after 200 ms slowed down
loaded

plasma into rampdown --- injection killed fast current rise by 0.1 s
density is down but more gas injected w/o the icrf
rf faulted before 0.1 s

Feb 22 2008 01:44:54:733PM 1080222018 Jim Irby repeat with a little more icrf

plasma for 0.348 s --- injection/marfe does us in

Feb 22 2008 01:59:16:733PM 1080222019 Jim Irby Bt to 5.2 T by t=0 (144 kA)

action monitor problem -- no power shot

Feb 22 2008 02:27:54:470PM 1080222020 Jim Irby try again with power

plasma into rampdown --- no icrf?

Bt was about 5.22 T

injection from inner wall stopped current rise around 88 ms

Feb 22 2008 02:36:45:030PM 1080222021 Jim Irby repeat with some icrf

plasma to 0.425 s --- still more injections

Feb 22 2008 02:49:25:323PM 1080222022 Jim Irby Bt up to 5.3 T from 5.2 T

plasma into rampdown --- current rise looks good

Feb 22 2008 03:07:22:547PM 1080222023 Jim Irby Bt to 5.6 T (155 kA)

plasma into rampdown --- current rise okay

Feb 22 2008 03:16:42:027PM 1080222024 Jim Irby increased clearin from 100 ms on to 0.015

plasma into rampdown

Feb 22 2008 03:28:54:277PM 1080222025 Jim Irby clearin to .02 before 270 ms
dropped programmed gas again trying to keep down early density rise

plasma for 0.318 s --- pulled pf breaker
injection begins at 0.30 s

Feb 22 2008 03:40:00:727PM 1080222026 Jim Irby clearin back to 0.01
icrf reduced

plasma into rampdown

Feb 22 2008 04:07:11:430PM 1080222027 Jim Irby loaded from 1070801015
loaded seg 1 from 1080222026 into seg 1
recalculated predictors for seg 2
loaded
removed backporch from TF
loaded

argon enabled from 0.3 to 0.4 s

plasma into rampdown

Feb 22 2008 04:22:30:370PM 1080222028 Jim Irby rcur from 0.640 to 0.6395 m
programmed gas reduced early
loaded

plasma into rampdown

got a little more outer gap
density still rising w/o gas input

Feb 22 2008 04:31:08:287PM 1080222029 Jim Irby no dpcs changes

plasma into rampdown --- current rise too fast?

Feb 22 2008 04:42:58:360PM 1080222030 Jim Irby prepuff from 18 to 20 ms
loaded

plasma into rampdown

Feb 22 2008 05:09:59:643PM 1080222031 Jim Irby imported seg 2 of 1070801035 into seg 2
did recals
loaded
rcur from 0.64 to 0.6395 m
loaded

plasma into rampdown --- compares well to 1070801035

Feb 22 2008 05:10:36:847PM 1080222032 Jim Irby repeat

fizzle --- hit something at 20 ms --- big ciii spike

EOT

Engineering Operator Comments

Shot Time Type Status Comment

1 08:48:20:577AM Test Ok No Power-Data System Test

2 09:10:09:337AM Plasma Ok PF breaker pulled after the disruption

3 09:33:23:940AM Plasma Ok

4 09:45:58:300AM Plasma Ok PF breaker pulled after the disruption

5 10:01:28:800AM Plasma Ok PF breaker pulled after the disruption

6 10:19:16:980AM Plasma Ok PF breaker pulled after the disruption

7 10:31:59:993AM Plasma Ok

8 11:01:37:733AM Plasma Ok PF breaker pulled after the disruption

9 11:14:15:200AM Plasma Ok

10 11:39:48:027AM Plasma Ok

11 11:57:04:547AM Plasma Ok

12 12:11:18:313PM Plasma Ok

13 12:23:53:593PM Plasma Ok

14 12:38:24:063PM Plasma Ok

15 12:55:26:003PM Plasma Ok

16 01:08:10:677PM Plasma Ok

17 01:24:08:647PM Plasma Ok

18 01:37:01:130PM Plasma Ok

19 01:53:25:917PM Plasma Bad No Power shot data problems

20 02:11:39:827PM Plasma Ok

21 02:26:15:343PM Plasma Ok

22 02:38:46:170PM Plasma Ok

23 02:55:11:830PM Plasma Ok

24 03:07:57:267PM Plasma Ok

25 03:20:24:470PM Plasma Ok Plasma Disrupt generated a voltage spike on OH1 (Type 1 fault generated)

26 03:37:51:850PM Plasma Ok

27 03:54:03:040PM Plasma Ok

28 04:11:54:827PM Plasma Ok

29 04:24:38:730PM Plasma Ok

30 04:38:41:980PM Plasma Ok

31 04:52:57:653PM Plasma Ok

32 05:05:29:217PM Plasma Ok

System Availability

Feb 22 2008 08:48:14:047AM

System Available Comment Availability
Changed Owner Description Who Can
Change
Active MHD yes Fully operational Mar 28 2007 09:19PM (sears) Joe Snipes Active MHD Antenna sears,snipes
BES yes vertical array of six views at R ~ 87.3 cm, radial array of three views out to R ~ 89 cm, both at outboard midplane. Three discrete fiber views of beam at R ~ 70.0, 76.5 and 82.5 cm. Feb 06 2007 10:00AM (bravenec) Ron Bravenec Beam Emission Spectroscopy bravenec,rowan
Bolometers yes Diode 2pi working fine, foil 2pi being low-pass filtered to remove noise. Outboard miidplane AXUV fine. Midplane foils working fine, but need to fill tree with calibrations. 2D AXUV arrays are being digitized but need further debugging and calibration. Dec 19 2007 07:16PM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization no First Boronization 5/9/07 Bottle has been removed from the cell Sep 14 2007 12:42PM (dekow) Jim Irby Boronization dekow,irby
CNPA yes Single channel CNPA available as of 12/1707 Dec 17 2007 05:48PM (parker) Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor yes Cryopump is operational Dec 11 2007 10:13AM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard
CXRS yes The pedestal toroidal array was installed, spatially and absolutely calibrated. There are 10 chords intersect the beam at the major_R_range=[74.2:86.3]cm. Spatial resolution: 1.2 cm. The F-top poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[67.8:91.0]cm. Spatial resolution: 1.22 cm. Nov 27 2007 10:21AM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,rachmcd,rowan
D Alpha yes \ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are available Nov 26 2007 04:23PM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe
Dalsa yes optics repaired, camera re-installed, and view has been re-calibrated Nov 27 2007 09:54AM (marmar) Earl Marmar Visible Bremsstrahlung marmar
Disruption Mitigation no Nov 20 2007 10:47PM (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 Nov 20 2007 10:47PM (granetz) Robert Granetz Diagnostic Neutral Beam beals,granetz
FRC-ECE yes 16 Channels now working - low freq. side - outer Rmids Feb 19 2008 09:56AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips
G-Side Ratiomatic yes Gauge is operational and calibrated against G-side MKS on shot#1071127002 Nov 27 2007 01:25PM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
GPC yes All 9 channels operational as of new year. Jan 03 2008 09:31AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPC2 yes Most channels operational. Jan 02 2008 12:22PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPI no Neither the Xpt-view nor the midplane-view camera is operational. Nov 26 2007 04:25PM (terry) Jim Terry Gas Puff Imaging terry,zweben
H/D yes Should be operational for the FY08 campaign Nov 27 2007 09:54AM (marmar) Earl Marmar H/D Ratio marmar
Hirex Jr yes Mar 06 2007 08:59AM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr no Be Window has a leak and so the gate valve is closed Nov 23 2007 12:50PM (ince) John Rice High Resolution X-Ray ince,rice
HXR yes Something might be wrong with channel 26; all others working fine. Mar 23 2007 10:43AM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt
ICRF D-Antenna yes available (quarter-wave transformer for pre-matching) Dec 11 2007 09:01AM (ylin) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes available (with FFT for automatical matching) Dec 11 2007 09:01AM (ylin) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes normally in [0,pi,pi,0] phase for heating. current drive phase available if requested. Dec 11 2007 09:03AM (ylin) Steve Wukitch J-port antenna wukitch,ylin
Lower Hybrid yes Body I Fault Circuits Repaired and tested. High power tests completed Dec 05 2007 06:40PM (dterry) Ron Parker Lower Hybrid dterry,parker
LPI yes 1/9/08 Jan 09 2008 03:23PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha yes Midplane working fine, emissivity profiles being stored in tree, but still need to apply in-vessel calibrations to data. WB1-LY being digitized, but not processed in tree. Dec 09 2007 06:53PM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke
McPherson no Problems with detector. No quantitative line brightnesses possible. Qualitative tasks like impurity identification possible. Feb 15 2008 02:07PM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Working, moderate speed for now. Jan 02 2008 01:19PM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes E-Top, E-Bottom, F-top (cryo), G-side, and B-bottom are operational. F-top gauge has a 'sniffer tube' to measure pressures in cryopump gas box. Mar 20 2007 06:42PM (g) Brian LaBombard Baratron pressure gauges labombard
MLP no Initial tests on the A-port scanning probe went well. We need to take care of some control glitches that caused some component failures. May 30 2007 08:01PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard
MSE no We are basically awaiting the DNB & its new aperture. MSE itself is OK. Feb 21 2008 08:51AM (jinseok) Steve Scott Motional Stark Effect jinseok,sscott
Neutrons yes Voltage is on for the He3 bank. Voltage will be turned on for the global system at the first plasma attempts. Nov 26 2007 08:31AM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes calibration unchanged from 2007 campaign Dec 04 2007 08:56PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby
NINJA yes All capillaries displayed by the NINJA_CONTROL GUI have been tested. Nov 26 2007 04:26PM (terry) Brian LaBombard NINJA gas puff labombard,terry
PCI no Both CO2 and HeNe Lasers are disabled----- safe for machine entry. Sep 14 2007 03:21PM (lianglin) Miklos Porkolab Phase Contrast Imaging edlund,lianglin,ntsujii,porkolab
Penning Gauges yes All gauges except B_DivL are operating Nov 27 2007 01:31PM (labombard) Brian LaBombard Penning Ionization Gauges labombard
Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Nov 26 2007 04:27PM (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
Probe Array - ISD yes Operational Nov 27 2007 01:40PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH yes Operational Nov 27 2007 01:40PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes Operational Nov 27 2007 01:41PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard
Probe Array - UDIV yes Operational Nov 27 2007 01:41PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes 50, 60, 75 and 88GHz channels are connected and being tested for the campaign Dec 18 2007 10:28AM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Operational, but needs to be checked with plasma. Nov 27 2007 01:45PM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes FSP is operational Dec 11 2007 10:13AM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP yes A- and K-port WASP electrodes have been replaced/tested. Nov 27 2007 01:44PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
TCI yes CO2 Laser is on --- initial alignment complete Nov 16 2007 01:23PM (irby) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes 12 polychromators (#1~8,9,11,13,15), 1 laser. Density is calibrated for YAG2 on polychromator 1~8. YAG1 is not calibrated yet. Density calibration hasn't been performed on ploychromator 9~16. Feb 21 2008 11:19AM (yma) Jerry Hughes Core Thomson scattering jwhughes,yma
TS - Edge yes System is working. Density is derived with last year's calibration, and should be good to within ~20%. Jan 18 2008 07:27AM (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
XTOMO yes system operational Jan 10 2008 11:41AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke

Session Leader Comments
Feb 22 2008 09:26:41:903AM	1080222002	Eric Edlund	P_rf ~ 0.8 MW in ramp disruption at about 0.45 seconds no RSAE activity seen by PCI
Feb 22 2008 09:51:57:963AM	1080222003	Eric Edlund	fizzle
Feb 22 2008 09:58:05:813AM	1080222004	Eric Edlund	single TAE mode around 0.16s no RSAEs repeat, try for better RF matching
Feb 22 2008 10:11:54:097AM	1080222005	Eric Edlund	beginning traces of RSAEs near 0.15s lower triang. near 0.28, target 0.24
Feb 22 2008 10:33:02:260AM	1080222006	Eric Edlund	nothing on PCI no data from board 1 try no power from ICRF to test control systems
Feb 22 2008 11:02:40:937AM	1080222007	Eric Edlund	no RF, no disruption try to increase current ramp rate and try again with RF
Feb 22 2008 11:11:05:793AM	1080222008	Eric Edlund	starting to see traces of RSAEs current ramp rate similar to 2004 RF moved to start at 80ms try to reconfigure to 2004 settings turn off RF and test equilibrium on next shot
Feb 22 2008 11:49:50:993AM	1080222010	Eric Edlund	few faint RSAEs clean RF power from 100ms on disruption at 0.45s try to move towards nose limited geometry
Feb 22 2008 12:10:37:813PM	1080222011	Eric Edlund	no RSAEs increase flattop density to try to mitigate disruptions try to increase clearin increae ICRF to 4MW
Feb 22 2008 12:31:38:307PM	1080222013	Eric Edlund	no RSAEs, 4MW ICRF abrupt excitation of TAEs suggests absence of reversed shear increase ramp rate and try again
Feb 22 2008 01:05:14:673PM	1080222014	Eric Edlund	no RSAEs, weak TAEs
Feb 22 2008 01:04:47:203PM	1080222015	Eric Edlund	no RSAEs, early ICRF trip, D&E only stronger TAEs ramp rate matching 2004 more closely try to increase flattop current and try again
Feb 22 2008 01:25:38:883PM	1080222016	Eric Edlund	no RSAEs, some TAEs density higher now faster current ramp, flattop current target of 1.1MA try to lower density and try again
Feb 22 2008 01:28:52:263PM	1080222017	Eric Edlund	injection during current rise density came down try again
Feb 22 2008 01:52:57:120PM	1080222018	Eric Edlund	good RF, 4MW density still a bit high, ~0.75 at 0.150s move to 5.2T, put J near axis
Feb 22 2008 02:02:56:910PM	1080222019	Eric Edlund	no power shot
Feb 22 2008 02:18:15:147PM	1080222020	Eric Edlund	no RF carbon injection near 0.1s repeat
Feb 22 2008 02:39:53:297PM	1080222021	Eric Edlund	early injection back off to 5.3T try again
Feb 22 2008 03:50:58:177PM	1080222022	Eric Edlund	5.6T 4MW ICRF no RSAEs
Feb 22 2008 03:17:14:357PM	1080222024	Eric Edlund	incrased clearin fainter traces of RSAEs push clearin again try to lower density keep ICRF at 3MW
Feb 22 2008 03:32:02:343PM	1080222025	Eric Edlund	no RSAEs repeat, back off on clearin
Feb 22 2008 03:42:56:840PM	1080222026	Eric Edlund	one faint RSAE density at the 2004 level ran with J&E only
Feb 22 2008 05:09:02:423PM	1080222027	Jim Terry	J. Terry took over as SL starting on this shot. Good shot, though density is too high, 8.2e19 instead of 7.0. outer gap is 3.3 cm instead of 3.6 cm nothing on either of the phantom cameras' images diode views 10 and 11 saturated for part of the puff, others are good. NINJA setup 489 Torr D2 pressure AB-Lim and K-bolo capillaries enabled to fire at 0.88 s for 0.15 s duration Gas hits at 1.008 s. 8.6 T-l puffed. phantom setup: phantom (slave) trigger set to 1.0 s; 4 usec integration time phantom2 (master) trigger set to 1.0 s; 142 kHz frame rate; 5 usec integration time fast-diode setup for shot 1080222027 the fast-diode data window was from 1.000 to 1.524 sec diode # trans fiber # view F/no 1 GPI #3 OUTER SOL 36 F/1.4 2 GPI #2 OUTER SOL 22 F/1.4 3 GPI #1 OUTER SOL 21 F/1.4 4 GPI #4 OUTER SOL 23 F/4.0 5 GPI #5 OUTER SOL 10 F/2.8 6 #39 OUTER SOL 9 F/4.0 7 #40 OUTER SOL 7 F/1.4 8 #41 OUTER SOL 11 F/4.0 9 #42 OUTER SOL 12 F/5.6 10 #43 OUTER SOL 13 F/5.6 11 #44 OUTER SOL 14 F/8.0 12 #45 OUTER SOL 6 F/1.4 13 #46 OUTER SOL 29 F/8.0 14 #47 OUTER SOL 31 F/1.4 15 #48 OUTER SOL 32 F/1.4 16 #49 OUTER SOL 33 F/2.0 17 #50 OUTER SOL 34 F/2.8 18 #51 OUTER SOL 35 F/2.8 19 #52 OUTER SOL 3 F/1.4 20 #20 OUTER SOL 37 F/4.0 21 #21 OUTER SOL 38 F/2.8 22 #22 OUTER SOL 39 F/2.8 23 #26 OUTER SOL 40 F/2.0
Feb 22 2008 05:10:21:457PM	1080222028	Jim Terry	Good shot, though density is too high, 8.5e19 instead of 7.0. outer gap is now 3.5 cm - OK weak signal on the phantom (OUTER MIDPLANE) diode views 10 and 11 saturated for part of the puff, others are good. NINJA setup 489 Torr D2 pressure AB-Lim and K-bolo capillaries enabled to fire at 0.88 s for 0.15 s duration Gas hits at 1.008 s 8.7 Torr-l puffed phantom setup: phantom (slave) trigger set to 1.0 s; 8 usec integration time phantom2 (master) trigger set to 1.0 s; 90.9 kHz frame rate; 9 usec integration time
Oct 14 2008 02:55:08:603PM	1080222029	Jim Terry	Good shot, though density is too high, 8.5e19 instead of 7.0. outer gap is now 3.5 cm - OK Increase NINJA pressure to 15 psi, but turn K-bolo capillary off max signal on the phantom (OUTER MIDPLANE) is 1200 counts. diode views 33,34,35,38, 39, 40 ,23, 9, 10 and 11 are saturated for part of the puff, others are good. NINJA setup 695 Torr D2 pressure only AB-Lim capillary enabled to fire at 0.88 s for 0.12 s duration gas hits before 1.0 sec. phantom setup: phantom (slave) trigger set to 1.0 s; 8 usec integration time phantom2 (master) trigger set to 1.0 s; 90.9 kHz frame rate; 9 usec integration time ANALYSIS: here is the average intensity assuming the phantom response is linear (which it isn't) here is the average intensity assuming the phantom response is been made linear based on the bench calibration here is the profile of the average intensity at Z=-3.75 assuming the phantom response is linear (which it isn't). The dashed line is the sepx location; the solid line is the radius of the nozzle. here is the profile of the average intensity at Z=-3.75 removing the phantom's non-linear response. The dashed line is the sepx location; the solid line is the radius of the nozzle. Here is the correlation between the diode signal from view 36 and the phantom pixels (after removing the non-linearity and summing over a 3 mm sq spot) yielding the large cross-correlation: Here is the contour plot of the correlations between the diode signal from FD view 36 and the phantom pixels (after removing the non-linearity and summing over a 3 mm sq spot). Note that the contuors are "strectched along the flux surfaces: Here is the correlation between the diode signal from view 12 and the phantom pixels (after removing the non-linearity and summing over a 3 mm sq spot) yielding the large cross-correlation: Here is the correlation between the diode signal from view 14 and the phantom pixels (after removing the non-linearity and summing over a 3 mm sq spot) yielding the large cross-correlation:
Feb 22 2008 04:50:20:870PM	1080222030	Jim Terry	Good shot, though density is too high, 8.7e19 instead of 7.0e19. outer gap is now 3.5 cm - OK max signal on the phantom (OUTER MIDPLANE) is ~1000 counts. diode views 33,34,35,38,39,40,23,9,10 and 11 are saturated for part of the puff, others are good. NINJA setup 695 Torr D2 pressure only AB-Lim capillary enabled to fire at 0.87 s for 0.12 s duration gas hits before 1.0 sec. 6.2 Torr-l puffed. phantom setup: phantom trigger set to 1.0 s; 148 kHz; 4.5 usec integration time phantom2 - not triggered
Feb 22 2008 05:04:14:650PM	1080222031	Jim Terry	Now go to Bt=2.8 T (ramped); Ip=0.4 MA Good shot max signal on the phantom (OUTER MIDPLANE) is ~1000 counts. diode views 33,34,35,38,39,40,23,9,10 and 11 are saturated for part of the puff, others are good. NINJA setup 694 Torr D2 pressure only AB-Lim capillary enabled to fire at 0.89 s for 0.12 s duration gas hits at 0.977 s 6.2 Torr-l puffed. phantom setup: phantom trigger set to 1.0 s; 148 kHz; 4.5 usec integration time phantom2 - not triggered
Feb 22 2008 05:08:32:420PM	1080222032	Jim Terry	Increase NINJA pressure to 18 PSI fizzle NINJA setup 846 Torr D2 pressure only AB-Lim capillary enabled to fire at 0.89 s for 0.12 s duration phantom setup: phantom trigger set to 1.0 s; 148 kHz; 4.5 usec integration time phantom2 - not triggered

Physics Operator Comments
Feb 22 2008 09:03:24:673AM		Jim Irby	loaded seg2 of 1070823019 into seg2 per sl --- 800 kA SNL, 8e19/m^2 recalculated all magnetics predictors for seg 2. loaded noticed that yesterday's startup was not acceptable at all for today. loaded seg1 from 1080215020 into seg1 --- good startup from last Friday loaded prepuff to 25 ms
Feb 22 2008 09:27:00:277AM	1080222002	Jim Irby	plasma for 0.467 s found engineering setup was for the wrong shot --- a-coils didn't turn on until 0.3 s instead of 0.2 s. ---- 1070823019 has now been loaded
Feb 22 2008 09:36:00:180AM	1080222003	Jim Irby	fizzle --- should have changed the prepuff
Feb 22 2008 09:54:51:013AM	1080222004	Jim Irby	prepuff from 25 to 23 ms loaded plasma for 0.385 s
Feb 22 2008 10:15:37:897AM	1080222005	Jim Irby	recalculated rcur in seg 2 --- probably not the problem loaded plasma for 0.384 s
Feb 22 2008 10:28:05:350AM	1080222006	Jim Irby	clearin from 0.01 to 0.005 m loaded plasma for 0.544 s --- better match to 1070823019 in inner gap vertical stability better
Feb 22 2008 11:00:30:020AM	1080222007	Jim Irby	no ICRF this time to see if we can get a full shot prepuff from 23 to 21 ms loaded plasma into rampdown
Feb 22 2008 11:13:23:513AM	1080222008	Jim Irby	prepuff from 21 to 20 ms --- may get a little faster Ip ramprate Steve Wolfe is trying to figure out how to run shot for 1040406 short plasma --- rf I assume Ip ramp rate was a little faster
Feb 22 2008 11:37:59:290AM	1080222009	Jim Irby	Per Steve's direction we have modified all of the following: ZCUR Clearin timing RXL ZXL ZXU loaded plasma --- disruption
Feb 22 2008 11:49:19:523AM	1080222010	Jim Irby	changed clearin and RXL to get closer to 1040406018 loaded short plasma, 460 ms --- vertically unstable --- pulled PF breaker
Feb 22 2008 12:09:17:827PM	1080222011	Jim Irby	Ip dropped to 600 kA after 200 ms loaded RXL and ZXL tweaked again CLEARIN ramp started earlier loaded plasma for 0.36 s ---
Feb 22 2008 12:21:17:840PM	1080222012	Jim Irby	clearin up to 0.015 from 0.010 early nl_04 to 1.2e20/m^2 after 0.3 ms loaded plasma for 1.02 s
Feb 22 2008 12:35:59:420PM	1080222013	Jim Irby	nl_04 request to 1.5e20 after 0.3 s plasma for 0.44 s
Feb 22 2008 12:53:14:673PM	1080222014	Jim Irby	prepuff from 20 to 18 ms reduced clearin late back down to 0.01 dropped density request after 0.3 s plasma into rampdown
Feb 22 2008 01:04:28:843PM	1080222015	Jim Irby	Ip ramp rate increased slightly at 0.1 s --- 600 to 650 request Just D&E antennas plasma into rampdown -- dIp/dt a little better
Feb 22 2008 01:21:41:083PM	1080222016	Jim Irby	Ip request increased to 1.1 MA from 100 ms to 200 ms (still back down after 200) plasma to 0.376 s ---- got the Ip rise density rising before 100 ms
Feb 22 2008 01:35:03:253PM	1080222017	Jim Irby	nl_04 request between 100 and 200 ms reduced programmed gas before 100 ms reduced Ip drop after 200 ms slowed down loaded plasma into rampdown --- injection killed fast current rise by 0.1 s density is down but more gas injected w/o the icrf rf faulted before 0.1 s
Feb 22 2008 01:44:54:733PM	1080222018	Jim Irby	repeat with a little more icrf plasma for 0.348 s --- injection/marfe does us in
Feb 22 2008 01:59:16:733PM	1080222019	Jim Irby	Bt to 5.2 T by t=0 (144 kA) action monitor problem -- no power shot
Feb 22 2008 02:27:54:470PM	1080222020	Jim Irby	try again with power plasma into rampdown --- no icrf? Bt was about 5.22 T injection from inner wall stopped current rise around 88 ms
Feb 22 2008 02:36:45:030PM	1080222021	Jim Irby	repeat with some icrf plasma to 0.425 s --- still more injections
Feb 22 2008 02:49:25:323PM	1080222022	Jim Irby	Bt up to 5.3 T from 5.2 T plasma into rampdown --- current rise looks good
Feb 22 2008 03:07:22:547PM	1080222023	Jim Irby	Bt to 5.6 T (155 kA) plasma into rampdown --- current rise okay
Feb 22 2008 03:16:42:027PM	1080222024	Jim Irby	increased clearin from 100 ms on to 0.015 plasma into rampdown
Feb 22 2008 03:28:54:277PM	1080222025	Jim Irby	clearin to .02 before 270 ms dropped programmed gas again trying to keep down early density rise plasma for 0.318 s --- pulled pf breaker injection begins at 0.30 s
Feb 22 2008 03:40:00:727PM	1080222026	Jim Irby	clearin back to 0.01 icrf reduced plasma into rampdown
Feb 22 2008 04:07:11:430PM	1080222027	Jim Irby	loaded from 1070801015 loaded seg 1 from 1080222026 into seg 1 recalculated predictors for seg 2 loaded removed backporch from TF loaded argon enabled from 0.3 to 0.4 s plasma into rampdown
Feb 22 2008 04:22:30:370PM	1080222028	Jim Irby	rcur from 0.640 to 0.6395 m programmed gas reduced early loaded plasma into rampdown got a little more outer gap density still rising w/o gas input
Feb 22 2008 04:31:08:287PM	1080222029	Jim Irby	no dpcs changes plasma into rampdown --- current rise too fast?
Feb 22 2008 04:42:58:360PM	1080222030	Jim Irby	prepuff from 18 to 20 ms loaded plasma into rampdown
Feb 22 2008 05:09:59:643PM	1080222031	Jim Irby	imported seg 2 of 1070801035 into seg 2 did recals loaded rcur from 0.64 to 0.6395 m loaded plasma into rampdown --- compares well to 1070801035
Feb 22 2008 05:10:36:847PM	1080222032	Jim Irby	repeat fizzle --- hit something at 20 ms --- big ciii spike EOT

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:48:20:577AM	Test	Ok	No Power-Data System Test
2	09:10:09:337AM	Plasma	Ok	PF breaker pulled after the disruption
3	09:33:23:940AM	Plasma	Ok
4	09:45:58:300AM	Plasma	Ok	PF breaker pulled after the disruption
5	10:01:28:800AM	Plasma	Ok	PF breaker pulled after the disruption
6	10:19:16:980AM	Plasma	Ok	PF breaker pulled after the disruption
7	10:31:59:993AM	Plasma	Ok
8	11:01:37:733AM	Plasma	Ok	PF breaker pulled after the disruption
9	11:14:15:200AM	Plasma	Ok
10	11:39:48:027AM	Plasma	Ok
11	11:57:04:547AM	Plasma	Ok
12	12:11:18:313PM	Plasma	Ok
13	12:23:53:593PM	Plasma	Ok
14	12:38:24:063PM	Plasma	Ok
15	12:55:26:003PM	Plasma	Ok
16	01:08:10:677PM	Plasma	Ok
17	01:24:08:647PM	Plasma	Ok
18	01:37:01:130PM	Plasma	Ok
19	01:53:25:917PM	Plasma	Bad	No Power shot data problems
20	02:11:39:827PM	Plasma	Ok
21	02:26:15:343PM	Plasma	Ok
22	02:38:46:170PM	Plasma	Ok
23	02:55:11:830PM	Plasma	Ok
24	03:07:57:267PM	Plasma	Ok
25	03:20:24:470PM	Plasma	Ok	Plasma Disrupt generated a voltage spike on OH1 (Type 1 fault generated)
26	03:37:51:850PM	Plasma	Ok
27	03:54:03:040PM	Plasma	Ok
28	04:11:54:827PM	Plasma	Ok
29	04:24:38:730PM	Plasma	Ok
30	04:38:41:980PM	Plasma	Ok
31	04:52:57:653PM	Plasma	Ok
32	05:05:29:217PM	Plasma	Ok