Alcator C-Mod Run 1110325 Information

Miniproposals

Miniproposal: 636

Date Filed: 1/3/2011

Title: Study of ELMy H-mode: Toroidal field scan.

First Author: Jerry Hughes

Session Leader: Jerry Hughes (shots 1-34)

Session Leader: Phil Snyder (shots 5-34)

Operators
Session leader(s):	Jerry Hughes,Phil Snyder
Physics operator(s):	Steve Scott
Engineering operator(s):	Andy Pfeiffer

Engineering Operator Run Comment
MP636, "Study of ELMy H-mode: Toroidal field scan" SL: J. Hughes, P. Sny

Session Leader Plans

Entered: Mar 25 2011 05:42:04:547AM

Author: Jerry Hughes

SL Plan for 1110325

MP636, "Study of ELMy H-mode: Toroidal field scan"
SL: J. Hughes, P. Snyder
PO: S. Scott

Special Gas Request:
fill B-side lower with 1psi Ar Hybrid enabled (PG1)
fill H-bottom with 3psi Ne Hybrid disabled (PG5)
fill NINJA with 8 psi He DISABLED

Boronization: Done day before using the current preferred recipe
ECDC in He, ~2 hours previous evening, ~2hrs in morning

ICRF: J-port at 50MHz for fundamental D(H) heating at 3.5T. D,E available
for fundamental D(H) at 5.4T and possibly some 2nd harmonic at lower
fields.

LH: push launcher in for X-mode reflectometry measurements
Cryopump: no
DNB: yes, for CXRS

DIAGNOSTICS:
Core/edge TS
All ECE's.
Fast magnetics
X- and O-mode Reflectometry
PCI
Fast D-alpha
edge CXRS
Hirex Sr.

Run plan.

(1) Load 1101214029. This a 5.4T, 900kA ELMy H-mode shot.
nl04 demand is 4e19 before the H-mode, and is raised to 8e19 at 1s as a
safety net, in case the plasma drops out of H-mode at high power.
Enable diagnositc Ar puff: 25ms at 0.3s.
Operate D+E from 0.7 to 1.5s at 2--3MW. Establish a clean H-mode.
Seed if necessary with Ne.
3--4 shots

(2) Reduce flattop Bt to 3.4T. Set Ip to 700kA. Heat with J-port from 0.7 to
1.5s. Begin with power ramps from 1MW up to max available. Tailor the power
profile as needed to obtain good H-modes with ELMs. Several shots will likely
be needed to condition J and get the density down. Reduce Ip if q appears to be
too low.
5--6 shots

(3) Program 2 RF power steps from J: ~2MW from [0.7,1.1]s and maximum available
from [1.1,1.5]s. Run this discharge with initial nl04 of 5e19, first with
Ip~0.7MA and then with Ip=0.56MA. The second Ip point should match q95 on
1101214029. Repeat this sequence until the actual density is as low (or lower)
than demanded, or until we give up.
10--12 shots

(4) If it looks desirable, obtain some of the cases in (3) with higher
programed density, say 6.5e19 and 8.0e19.
3--5 shots

(5) If we are not too terribly plagued with prompt ion losses or other
limiter damaging phenomena at low current, then choose an interesting condition
obtained above and re-run the shot with Ip decreased to 0.4MA.
2--3 shots

(6) If interesting ELMy conditions are obtained at 3.4T, then attempt to run at
2.7T with 2nd harmonic D(H) heating using D+E at 80MHz. Repeat some low current
points from above.
3ā??-5 shots

(7) If there is time left over, set Bt to 5.5T and run some matched-q95
discharges with D+E.

Physics Operators Plans

Entered: Mar 25 2011 08:43:36:417AM

Author: Steve Scott

physOp plan for 1110325

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

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

Power systems as on: 1101214029

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

Gas setup:

B-side lower 1 psi Argon Hybrid ENABLED (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
B-main (C-side) 40 psi D2 Hybrid ENABLED (PG3)
B-Top 6 psi D2 Hybrid ENABLED (PG4)
fill H-bottom 3-psi Neon Hybrid DISABLED (PG5)
NINJA with 8 PSI HELIUM Hybrid DISABLED <-- note change

Enable gate-valves and shutters: ECE, VUV, HiREX Sr, Xeus
Leave z-bolo shutter as is (should be open)

Torvac gatevalve toggle (yes/no): no

Boronization(yes/no): yes (to be done afternoon on 3/24)
Overnight ECDC (yes/no): no
ICRF(yes/no): yes
LH(yes/no): no
Cryopump (yes/no): no
DNB (yes/no): yes

Vessel temperature: 35/35/35

------------------------------
ECDC Parameters (if requested)
------------------------------

Boronization on 3/24 should be followed by 3 hrs standard
helium ECDC

then 2 hours ECDC in helium in the morning prior to run:
use standard values of pressure and sweep for helium ECDC

Load segment-2 from 1101214029 (LSN, 5.4 T, 900 kA ELMy H-mode)
Load segment-1 from 1110323021

Changes:

1) reduce Argon puff at 0.30 sec from 50 ms to 25 ms.
2) Increase early NeL from 4.e19 to 5.e19

Take 2-3 shots to establish a clean H-mode with D+E at 2-3 MW. Seed with neon as needed to control impurity injections.

Then, reduce flattop BT to 3.5 Tesla in segment-2, and reduce Ip to 700 kA.
Heat with J-port. Begin with power ramps from 1 MW to maximum available power. Power will be adjusted by SL to obtain good H-modes with ELMs.

Once this condition is established, we will scan the density and current as per whims of the Session Leader.

Session Leader Summaries

Entered: Mar 25 2011 06:31:54:027PM

Author: Phil Snyder

A very productive run day for studying ELMs and pedestal physics at low magnetic field (3.5T). Many thanks to everyone involved.

It was surprisingly easy to achieve low density ELMing plasmas at 3.5T in the usual JFT-2M shape. The expected problems achieving sufficiently low collisionality (density) at 3.5T were not evident, as the first attempt at 3.5T (shot 8) achieved steady ELMing periods. A successful current scan produced ELMing discharges at three values of Ip, 700kA (eg shot 8, 12, 25, 31, 32), 560kA (shots 17-19), and 440kA (shot 34). Density and power scans were also conducted at 700kA and 560kA, with a good range of density achieved at 700kA. At higher densities, the ELMs go away as expected. There are several timeslices noted in the log that should be useful for analysis and comparison to models such as EPED.

It appeared early in the day that ELMs might be going away due to ramped up RF power (eg 24), but it was later found (shot 25) that starting at high power and then reducing it produced ELMs at high power. It appears that back transitions to L-mode, which sometimes occur at around 1-1.1s, cause a change in plasma conditions that tends to make steady ELMing conditions difficult to achieve afterward. However, cause and effect is not clear here, and requires further study. It is also not completely clear in all cases whether observed ELMs are Type I or Type III.

There are many interesting observations of a variety of moderate to high frequency fluctuations in these discharges. In some cases these fluctuations are observed to onset shortly before ELMs, and may potentially play a role in constraining the evolution of pedestal profiles. It would be interesting to study the fluctuation data from this day in detail.

The conditioning phase of the day ended with a very nice shot at 5.4T, 900kA (shot 6), with a very long steady ELMing period, that is also a good candidate for analysis. Combining with earlier days at 5.4T and 8T should provide a good scan of Bt in ELMing H-modes over a factor of more than 2, in plasmas with a range of current, density, and power.

Entered: Mar 26 2011 05:09:06:273PM

Author: Jerry Hughes

The purpose of this run was to expand the C-Mod data set in ELMy H-mode to
reduced values of magnetic field (3.5T in this case to utilize on-axis
fundamental D(H) heating with J-port at 50MHz). These data were needed to
complete a comparison of C-Mod results to the predictions of the EPED model for
pedestal width, and to provide information about whether pedestal width shows
any scaling with normalized machine gryroradius. This run contributes directly
to the FY11 FES JRT in Pedestal Physics, and Phil Snyder (GA) co-led the session
remotely. The run also had the participation of ITPA collaborators Tom
Osborne (GA), Marc Beurskens (CCFE) and Lorenzo Frassinetti (KTH-Stockholm).
The main goals of this experiment were accomplished.

We began by reproducing a low-elongation, high lower trangularity ELMy H-mode
case from a December experiment, using 80MHz ICRF from D and E-port for
central heating at 5.5T. Recovery from boronization was relatively quick,
although it was deemed advisable to seed with Ne after the initial shots
showed signs of severe hot spots in the divertor, and occasional injections.
An ELMy H-mode similar to the target shot was obtained on shot 006, after which
we lowered the field to 3.5T for the remainder of the day. We easily obtained
ELMy H-mode at the 5/8 field, as early as shot 008. Then we spent the remainder
of the day attempting to very power and density at Ip of 700kA (008--013,
023--031), 560kA (014, 015, 017--019, 032, 033) and 440kA (020--022, 034). Some
ELMs were obtained at all three of these currents, with QCM activity more
prevalent at the lower currents. Generally, pedestal profile data were very
good, and this data set should be very good for EPED analysis and stability
calculations.

Jim Terry got some good data with the GPI in He, showing some ELM precursors,
and filament propagation. Cornwall Lau got some reflectometry data which may be
good for looking at L-H transitions and/or ELM transients. Lots of interesting
stuff was reported on magnetics by David Pace, and Arturo Dominguez saw lots of
intriguing signatures in the O-mode reflectometry looking at the pedestal, including changes in the quasi-coherent modes around the time of ELMs. Thanks
to all these dedicated diagnosticians for making this a successful run.

On the last 3 shots, the DNB was operated in deuterium, so that the DNB/MSE
teams could use the excess neutrons to evaluate the neutral current in the
plasma.

See the SL_SUMMARY by Snyder for more info.

Physics Operator Summaries

Session Leader Comments

Mar 25 2011 09:16:11:940AM 1110325001 Jerry Hughes Shot 1.

Attempt: Load 1101214029 and fire up D+E.

Result: J-port was fired too. Need to turn that off for next shot.
Ohmic density looks reasonably low. Density screams up after RF come on.

Mar 25 2011 09:55:49:243AM 1110325002 Jerry Hughes
Shot 2.

Attempt: Retry without J.

Result: D and E run clean at ~1.5MW, L-mode
Nasty injections from the divertor slot, from the vicinity of H-J-K,
as we've seen in the past. Enable Ne seeding on next shot.

WIDE2 looks good again. Thanks, JT!

Mar 25 2011 09:56:28:463AM 1110325003 Jerry Hughes Shot 3.

Attempt: Retry with some Ne seeding.

Result: H-modes, No killer injections.
Ohmic target desnity looks good.
Relatively clean pedestal profiles. Not a lot of SOL coverage.
ne,ped is >2e20. Kind of high.
First ELM comes at 0.92s. There appear to be others in later H-mode
phases of the discharge.

Mar 25 2011 09:58:27:460AM 1110325004 Jerry Hughes Shot 4.

Retry with a little more power

Result: Early locked mode and high Prad. No good H-modes

Mar 25 2011 10:04:01:770AM 1110325005 Jerry Hughes Shot 5.

Attempt: Fix early density drop and repeat.

Result: Much improved. 5 H-modes.
MLR reports plenty of Ar, Ne in the H-modes.
ne,ped is touching 2.3e20.

Mar 25 2011 10:29:46:477AM 1110325006 Phil Snyder Very nice ELMing discharge at standard Bt. Some RF drop outs, but several good ELMing periods. Go to low Bt for next shot.

Mar 25 2011 10:32:30:907AM 1110325006 Jerry Hughes Shot 6.

Attempt: Reduced Ar, Ne.

Result: A great ELMy H-mode shot. Steady H-mode, plenty of ELMs.
Decent pedestal coverage.
ne,ped is still still above 2e20. Pedestal Te looks reasonably high.

Mar 25 2011 10:36:26:460AM 1110325007 Jerry Hughes Shot 7.

Attempt: First attempt at 3.4T, 700kA

Result: Early disruption, PF breaker pull. Power supply issue?

Mar 25 2011 10:50:54:300AM 1110325008 Phil Snyder Successful ELMing shot at 3.5T. Pedestal density appears to have come down slightly, and pedestal pressure is down, as expected.

Mar 25 2011 10:57:27:167AM 1110325008 Jerry Hughes Shot 8.

Attempt: Retry

Result: ELMs on the first 3.5 attempt!
J-port coming up, tolerating ELMs.
ne,ped slightly lower than in the higher-field case. Modest Te,ped in
evidence.
q95~3.1

Mar 25 2011 11:18:55:593AM 1110325009 Jerry Hughes Shot 9.

Attempt: Repeat with power steps

Result: 2 phases of either ELMy H-mode or very rapid dithers to L-mode
phases preceding H-L transitions.

Mar 25 2011 11:28:30:737AM 1110325009 Phil Snyder ELMs in bursts - some may be back-transitions. May not be an ideal shot for pedestal analysis.

Mar 25 2011 11:42:46:397AM 1110325010 Jerry Hughes Shot 10.

Attempt: Repeat with more ICRF demand, reduced Ne.

Result: Two H-mode phases at different density. ELMs are interspersed.
We continue to see the weakly coherent stuff at 200-300kHz prior to ELM
onset, as Arturo pointed out on shot 8.
Nothing regular in evidence.
A surprising locked mode shows up at 1.3s

Mar 25 2011 12:23:08:740PM 1110325011 Jerry Hughes Shot 11.

Attempt: Repeat

Result: H-modes, mostly ELM-free. A few ELM-like events are seen between
1.1s and 1.35s, but the input power is not very steady.

Mar 25 2011 11:59:08:923AM 1110325012 Phil Snyder Steady ELMing period from ~0.85-1.1s. Pedestal density stays low and fairly steady (~1.7e20).

Mar 25 2011 12:24:17:240PM 1110325012 Jerry Hughes Shot 12.

Attempt: Flat RF 1MW.

Result: A decent ELM-free phase, followed by ELMy phase in the first H-mode.
Low input power seems to be a key ingredient.

Mar 25 2011 12:28:10:360PM 1110325013 Jerry Hughes Shot 13.

Attempt: Lower power scan.

Result: ELMs and dithers. High Prad in the 2nd half of the flattop.

Mar 25 2011 12:29:44:780PM 1110325013 Phil Snyder Lower RF power to 600kW ramping up to 800kW. Initial ELMs followed by dithering period. No steady H-mode achieved at this power.

Very interesting mode seen on the reflectometry preceding the early ELMs. Possible candidate for K(R)BM.

Next shot: Move on to lower current, Ip=560kA.

Mar 25 2011 12:34:46:367PM 1110325014 Jerry Hughes Shot 14.

Attempt: Ip=560kA.

Result: Got the conditions we wanted. q95~3.7. H-mode triggered
after 1s. No clear ELMs. Should try for more power.

Mar 25 2011 12:44:15:677PM 1110325015 Phil Snyder Series of back-transitions, with no ELMing H-Mode. Try staying at the same RF power, but reducing neon & argon, to see if we can slow radiated power rise.

Mar 25 2011 12:51:14:717PM 1110325015 Jerry Hughes Shot 15.

Attempt: A little more ICRF power

Result: Multiple H-modes. Prad rise is fairly swift in each.
QCM is in evidence now, but is not giving rise to a steady H-mode.

Mar 25 2011 12:51:51:090PM 1110325016 Jerry Hughes Shot 16.

Attempt: Retry with no Ne, less Ar

Result: Dud.

Mar 25 2011 01:11:19:167PM 1110325017 Phil Snyder Nearly steady ELMing period from ~0.95-1.15s. Pedestal density and temperature are fairly low, as expected at this Ip and Bt.

Mar 25 2011 01:21:04:833PM 1110325017 Jerry Hughes Shot 17.

Attempt: Retry 15 with no Ne, less Ar

Result: Multiple H-modes with some big H-alpha spikes preceding the H-L
transition. Looks similar to shot 009, at the higher Ip.
These ELMs seem to onset when the Te,ped drops _below_ some criticla value.

Because we turned off the Ne, this shot has a lower radiated power fraction,
so higher net power. Seems like we should go up in power for next shot.

Mar 25 2011 01:26:27:543PM 1110325018 Phil Snyder Fairly steady ELMing period from ~0.88-1.05s. Pedestal density and temperature low as expected, pressure very roughly 8kPa.

Mar 25 2011 01:37:18:310PM 1110325018 Jerry Hughes Shot 18.

Attempt: Repeat with more power.

Result: Some ELMs intermixed with QCM, as on shot 017.

Mar 25 2011 01:47:31:703PM 1110325019 Jerry Hughes Shot 19.

Attempt: Increased power yet again.

Result: Long H-mode with slow density rise. Pedestal desnity doesn't come up
to the level of the previous shot until about 1s. Shortly after that,
there seems to be an ELM. . .
Increased RF power just doesn't seem to get us ELMs today.

Mar 25 2011 02:15:42:860PM 1110325020 Jerry Hughes Shot 20.

Attempt: Reduce Ip to 440kA, 1MW flat from J-port

Result: Somewhat steady EDA H-mode starting at 0.75s. Density pedestal is down
at the 1.5e20 level or below and seems wider at this low Ip.

Mar 25 2011 02:18:10:230PM 1110325021 Jerry Hughes Shot 21.

Attempt: Repeat 20 without the large programed increase in nl04 feedback at 1s.

Result: H-mode doesn't last any longer than on 020. J-port has a number of
faults. Will try for more power anyway.

Mar 25 2011 02:31:59:927PM 1110325022 Jerry Hughes Shot 22.

Attempt: More power.

Result: Yijun coaxes 1.75MW out of J. EDA H-mode, no ELMs. A dramatic
injection kills the discharge at 0.92s.

Mar 25 2011 02:39:37:980PM 1110325023 Phil Snyder Repeat of shot 8 with no neon. Steady ELMing period, as in shot 8, from ~0.8-1.1s.

Mar 25 2011 02:45:29:563PM 1110325023 Jerry Hughes Shot 23

Attempt: Repeat Shot 8, though with no Ne and 25ms Ar pulse.

Result: Ohmic density matches that on shot 008, but the pedestal density is
considerably lower. ELMs are higher frequency.

Density begins to rise concurrent with the disappearance of the rapid ELMs
around 1.1s. Cause/effect? This about the same time that the NINJA is
puffing and the RF is ramping. For next shot let's have the RF ramp 100ms sooner
and have NINJA puff 100ms later.

Mar 25 2011 02:58:35:693PM 1110325024 Jerry Hughes Shot 24

Attempt: Ramping power in the 700kA, 3.5T case.

Result: ELMs continue to disappear at the higher powers, and the ELM-free
periods show considerable rate of rise in density, Prad.
There seems to be a very narrow window in power for these ELMs.

Mar 25 2011 03:08:52:387PM 1110325025 Phil Snyder Interesting shot. The RF waveform is reversed, with high power first and then lower power. Steady ELM period from ~0.9-1s at 2MW, and then another steady ELM period from ~1.1-1.25s at the lower power ~1MW. Clearly indicates that low power is not a requirement for getting ELMs, but there do seem to be differences between the early and later phases of the discharge.

Mar 25 2011 03:12:57:563PM 1110325025 Jerry Hughes Shot 25.

Attempt: Start at high power and then reduce.

Result: Interesting shot. Putting 2MW in early seems to work just fine
at triggering ELMs. Confinement is good early on, and then
very regular ELMs onset at 0.88s. Confinement is poorer in the ELMy phase
Subsequent H-modes exhibit a similar pattern, with gradual confinement
degradation throughout the shot.

Mar 25 2011 03:17:55:460PM 1110325026 Phil Snyder Steady ELMing period from ~0.85-1.05s. Should be a good case for analysis.

After 1.05s there is an RF cutout and back-transition, and the 2nd H-mode is different from the 1st.

Mar 25 2011 03:19:20:890PM 1110325026 Jerry Hughes Shot 26

Attempt: Maintain flat RF and try to prolong the ELMy H-mode.
Initial H-mode looks great. Lots of ELMs after 0.845s., very regular.
RF trip at 1.07s seems to lead to a back-transition from which we do not
recover another good ELMy H-mode.

Mar 25 2011 03:29:09:503PM 1110325027 Jerry Hughes Shot 27.

Attempt: Raise nl04 demand from 5e19 to 6.5e19.

Result: ne,ped came up. ELMS went away. J-port at 2MW with a few faults.

Mar 25 2011 03:45:39:387PM 1110325028 Jerry Hughes Shot 28.

Attempt: lower density at fixed power

Results: Beautiful shot with low, steady H-mode density and lots of ELMs.
But no Thomson. Have to retake it.

Mar 25 2011 04:00:18:407PM 1110325029 Jerry Hughes Shot 29

Attempt: Repeat 28 with Thomson.

Result: Shot starts out the same, except for a small excess in Prad at 0.777s.
I think the first ELM knocks out the RF. Again, once the RF faults and
tries to recover into a new H-mode, there seems to be no getting back the nice
ELMs.

Mar 25 2011 04:00:59:277PM 1110325029 Phil Snyder Unfortunately, not a great repeat of shot 28. Get 3 back-transitions early on, and an ELMing period later, but presumably with conditions altered by the back transitions.

Mar 25 2011 04:11:09:303PM 1110325030 Phil Snyder Early steady ELM period from ~0.78-1.0s, but short-lived. Very low pedestal density during ELMing phase.

Mar 25 2011 04:14:36:667PM 1110325030 Jerry Hughes Shot 30.

Attempt: Repeat 28 with no RF trip, Thomson.

Result: There is an RF trip at 0.76, but it does not prevent the reformation
of ELMy H-mode. The density in the first H-mode ends up being lower than
on shot 28, and the ELMs are higher frequency.

Mar 25 2011 04:21:22:843PM 1110325031 Phil Snyder Good shot. Steady ELMing period at very low pedestal density (~1.2e20), from ~0.8-1.15s.

Mar 25 2011 04:31:27:690PM 1110325031 Jerry Hughes Shot 31.

Attempt: Repeat 28 with no RF trip, Thomson.

Result: More high frequency ELMs in a low density H-mode, followed by later
H-mode with lower frequency ELMs.

Mar 25 2011 04:37:14:543PM 1110325032 Phil Snyder Current back down to 0.56MA. Early injection at ~.78s, followed by a fairly steady ELMing period from ~0.86-1.04s. Low pedestal density ~1.1e20.

Mar 25 2011 04:40:38:453PM 1110325032 Jerry Hughes Shot 32

Attempt: 560kA, nl04~3e19

Result: Low density ELMy H-mode followed by a moderate density H-mode.
Last H-mode appears solidly EDA. . . He puff assisted?

Mar 25 2011 04:50:22:457PM 1110325033 Jerry Hughes Shot 33

Attempt: Repeat shot 32 with no He NINJA puff, and no injection early in
H-mode, and with Thomson, and with steady RF . . .

Result: Decent ELMy period from 0.92 to 1.06, with ELM frequency changing
as other plasma parameters like density change.

Mar 25 2011 05:10:42:530PM 1110325034 Phil Snyder Good shot with ELMs at very low current, Ip~0.44MA. Steady ELM period from t~0.8-1.02s.

Interesting fluctuations on the magnetics and reflectomer.
Appears between ELMs and then transitions smoothly into QC mode.

Mar 25 2011 05:22:29:580PM 1110325034 Jerry Hughes Shot 34

Attempt: Ip to 440kA, density reduced from shots 20--22. 1MW from J.

Result: This worked well. Nice regular ELMing period between 0.8s and 1.05s.
Profiles look great. Arturo has nice stuff. Everybody's got a warm buzz.

Physics Operator Comments

Mar 25 2011 09:12:04:473AM 1110325001 Steve Scott Changes from reference shot 1101214029:
1) increase early NeL demand from 4.0e19 to 5.0e19
2) decrease argon puff to 25 ms

result: PRF = 1-2 MW, ratty waveforms. plasma disrupts at 1.08 sec
We got some power from J antenna, despite lack of He3 puffing.

Got quite a large density increase (to 1.4e20) during RF.

Mar 25 2011 09:29:59:600AM 1110325002 Steve Scott physOp changes from previous shot: increase Argon puff from 25 ms to 80 ms.

result: disrupted at 1.18 sec. interferometer seems to have had a problem
at about 0.2 sec.

clean RF waveform. Power ramps from 1.0 to 2.0 MW.

Mar 25 2011 09:35:32:940AM 1110325003 Steve Scott change from previous shot: enable H-bottom. puff neon at 40% from 0.4 to 0.6 sec.
note: pressure in H-bottom is 3.8 psi.

result: better. plasma disrupts in rampdown at 1.7 sec. RF = flat at 2.0 MW with some faults.

several ELM-free periods.

Mar 25 2011 09:54:38:620AM 1110325004 Steve Scott result: disrupts in rampdown at about 1.6 sec. No H-modes.
locked mode from 0.58 to 0.84 sec.
lost D-antenna at 1.13 sec.

Mar 25 2011 10:00:51:477AM 1110325005 Steve Scott change from previous shot: increase early NeL demand. Demand is still 5.e19, but will reach that density at t=0.23 sec.

result: 5 nice H-modes. plasma survives into rampdown, t=1.7 sec. RF power to 2 MW.

Mar 25 2011 10:17:04:053AM 1110325006 Steve Scott changes from previous shot:
1) decrease argon puff to 40 ms
2) decrease neon puff to 30%

result: nice shot. full length.

Mar 25 2011 10:43:49:640AM 1110325007 Steve Scott changes from previous shot: BT to 3.4 Tesla. Ip = 0.70 MA.

result: disrupts at t=0.59 sec.

there was a spike on OH1-voltage

Mar 25 2011 10:48:29:690AM 1110325008 Steve Scott no physOp changes from previous shot.
result: full length shot. SL is happy.
TF = 3.503 Tesla

Mar 25 2011 11:11:25:597AM 1110325009 Steve Scott physOp changes from previous shot: none

result: full length shot. nice shot. similar to shot 8.

Mar 25 2011 11:35:29:517AM 1110325010 Steve Scott Requested fill pressure in H-bottom (neon) to be reduced from 3.8 to 2.5.
Will leave gas programming on PG5 unchanged.

result: disrupts at t=1.37 sec.
possible locked mode? Disruption doesn't appear to have been caused by an injection.

Mar 25 2011 11:45:33:723AM 1110325011 Steve Scott physOp changes from previous shot: no changes.

result: full length shot. PRF to 2.4 MW. RF waveform is a little ratty.

Mar 25 2011 11:57:24:820AM 1110325012 Steve Scott physOp changes from previous shot: none.
RF will try to get power constant in time.

result: full length shot. Nice shot. PRF = 1.0 MW.

Mar 25 2011 12:10:05:540PM 1110325013 Steve Scott physOp changes from previous shot: none.
Will ask for a stepped RF waveform, 0.5 --> 0.7 MW

result: plasma survives into rampdown.

Mar 25 2011 12:26:24:950PM 1110325014 Steve Scott physOp change from previous shot: decrease Ip to 0.56 MA

result: plasma survives into rampdown. RF = 0.5 --> 0.7 MW

Mar 25 2011 12:40:13:313PM 1110325015 Steve Scott physOp changes from previous shot: none
Will increase RF power.

result: plasma survives into rampdown. 5 nice H-modes.
PRF = 1.1 - 1.4 MW

Mar 25 2011 12:51:27:907PM 1110325016 Steve Scott physOp changes:
1) disable h-bottom (neon)
2) reduce argon puff from 40 to 25 ms

result: dud. problem with EF1-upper

Mar 25 2011 01:06:47:987PM 1110325017 Steve Scott no physOp changes.

result: full-length shot.

Mar 25 2011 01:23:40:260PM 1110325018 Steve Scott no physOp changes this shot. raise RF power.

result: full length shot.

Mar 25 2011 01:37:04:710PM 1110325019 Steve Scott no physOp changes.

result: full-length shot.

Mar 25 2011 01:45:22:990PM 1110325020 Steve Scott physOp change: Ip --> 440 kW PRF=1.0 MW

result:

Mar 25 2011 02:02:56:843PM 1110325021 Steve Scott physOp change: decrease 'failsafe' density programming from 8.0e19 to 6.0e19

result: full length shot.

Mar 25 2011 02:22:36:973PM 1110325022 Steve Scott phyOp changes: none. Will try to increase PRF.

result: hard disruption at t=0.92 sec. Video shows glowing things flying thru the vacuum vessel.

Mar 25 2011 02:27:01:083PM 1110325023 Steve Scott Reload shot 8 from today. But note that we currently have disabled H-bottom (neon) . also reduce argon puff to 25 ms.

Mar 25 2011 02:28:25:100PM 1110325023 Steve Scott Reload shot 8 from today. But note that we currently have disabled H-bottom (neon) . also reduce argon puff to 25 ms.

result:

Mar 25 2011 02:48:08:197PM 1110325024 Steve Scott no physOp changes.
NINJA will move its puff 100 ms later in time.
small adjustment to PRF request: move forward 100 ms.

result: full length shot.

Mar 25 2011 03:00:21:040PM 1110325025 Steve Scott no physOp changes.
RF waveform will be reversed: high power initially followed by lower power

result: full length shot. nice shot.

Mar 25 2011 03:13:26:760PM 1110325026 Steve Scott No physOp changes. try to get constant RF power waveform.

result: full length shot.

Mar 25 2011 03:17:56:537PM 1110325027 Steve Scott physOp change: increase target NeL from 5.0e19 to 6.5e19.

Mar 25 2011 03:41:01:013PM 1110325028 Steve Scott decrease target NeL to 4.0e19

result: very nice shot. good ELMs. full length

alas, it looks like we got no Thomson data. So we need to take this shot again.

Mar 25 2011 04:07:09:077PM 1110325030 Steve Scott sscott DNB Mar 25 2011 03:54PM Edit Delete
no physOp changes. Hope to get a good plasma and Thomson data on the same shot.
small injection at t=0.15 sec

Mar 25 2011 04:16:49:747PM 1110325031 Steve Scott IMPORTANT NOTICE: the DNB will attempt to change over into deuterium for the last 1-2 shots today.

no physOP changes this shot.

result: full length shot.

Mar 25 2011 04:31:29:030PM 1110325032 Steve Scott set IP to 0.56 MA

result: full length shot.

NOTE: this shot has the DNB in deuterium. So neutron emission is not an indicator of Ti in this shot.

Mar 25 2011 04:42:59:407PM 1110325033 Steve Scott no physOp changes. NINJA puffing has been turned off.

DNB is still in deuterium.

Mar 25 2011 04:56:53:520PM 1110325034 Steve Scott no PhysOp changes. good shot.

End of run.

Engineering Operator Comments

Shot Time Type Status Comment

1 09:04:33:630AM Plasma Ok

2 09:17:06:643AM Plasma Ok

3 09:30:40:360AM Plasma Ok

4 09:43:18:043AM Plasma Ok

5 09:56:35:563AM Plasma Ok

6 10:11:35:453AM Plasma Ok

7 10:29:00:857AM Plasma Bad OH1 spowered ciruit

8 10:44:01:080AM Plasma Ok

9 11:07:30:493AM Plasma Ok

10 11:24:31:967AM Plasma Ok

11 11:39:54:343AM Plasma Ok

12 11:53:21:163AM Plasma Ok

13 12:07:33:000PM Plasma Ok

14 12:21:50:117PM Plasma Ok

15 12:35:46:540PM Plasma Ok

16 12:49:00:113PM Plasma Bad EF1 Upper power supply fail

17 01:04:43:120PM Plasma Ok

18 01:18:38:383PM Plasma Ok

19 01:33:41:240PM Plasma Ok

20 01:46:07:493PM Plasma Ok

21 01:58:42:077PM Plasma Ok

22 02:18:27:560PM Plasma Ok

23 02:30:52:297PM Plasma Ok

24 02:43:59:700PM Plasma Ok

25 02:56:38:270PM Plasma Ok

26 03:09:46:163PM Plasma Ok

27 03:22:18:463PM Plasma Ok

28 03:34:39:903PM Plasma Ok

29 03:46:55:507PM Plasma Ok

30 03:59:21:517PM Plasma Ok

31 04:13:11:737PM Plasma Ok

32 04:27:25:903PM Plasma Ok

33 04:39:45:177PM Plasma Ok

34 04:52:11:607PM Plasma Ok

System Availability

Mar 25 2011 09:04:18:640AM

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 yes BES system is online Oct 21 2010 11:33AM (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 yes Nov 16 2010 02:36PM (dekow) Jim Irby Boronization dekow,irby
CNPA yes Multiple channel CNPA available Oct 21 2010 07:11PM (parker) 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 yes Wide-view CXRS system is online Oct 21 2010 11:33AM (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. Oct 27 2010 03:41PM (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. Oct 22 2010 11:46AM (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 for Ti are available upon request. Vtor profiles still under revision. Dec 17 2010 09:25AM (ypodpaly) John Rice High Resolution X-Ray ince,rice,ypodpaly
HXR yes 32 Channels operational Oct 23 2010 01:41PM (parker) Ron Parker Hard X-Ray Array faust,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 working. New directional couplers installed at input to each klystron. Oct 21 2010 11:42AM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg
Lower Hybrid Reflectometer yes 50GHz: up-, 60 GHz up- and down- Oct 21 2010 11:31AM (sgbaek) Arturo Dominguez Lower Hybrid Reflectometer dominguez,marmar,parker,sgbaek
Lower Hybrid SOL reflectometer yes profiles and fluctuations both working. If requested, please request LH launcher to be moved in. Jan 18 2011 03:07PM (cornwall) Cornwall Lau Lower Hybrid SOL reflectometer cornwall,wukitch,ylin
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 vacuum problems fixed, still no wavelength scan - just used as a Mo/Cu/Ni/Fe/Ti monitor. Mar 25 2011 08:25AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Operational. Oct 22 2010 11:46AM (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 no Down due to chiller problem. Mar 25 2011 08:37AM (ntsujii) Miklos Porkolab Phase Contrast Imaging emd,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 no 1110216000 all waveguides disconnected to protect mixers Feb 16 2011 08:21AM (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 yes SSS installed and leak tested. Oct 21 2010 11:31AM (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 Oct 22 2010 01:06PM (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 Raw spectra stored but not line brightness time histories are going into the tree yet. Jan 20 2011 10:45AM (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

Mar 25 2011 09:30:26:447AM

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 yes BES system is online Oct 21 2010 11:33AM (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 yes Nov 16 2010 02:36PM (dekow) Jim Irby Boronization dekow,irby
CNPA yes Multiple channel CNPA available Oct 21 2010 07:11PM (parker) 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 yes Wide-view CXRS system is online Oct 21 2010 11:33AM (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. Oct 27 2010 03:41PM (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. Oct 22 2010 11:46AM (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 for Ti are available upon request. Vtor profiles still under revision. Dec 17 2010 09:25AM (ypodpaly) John Rice High Resolution X-Ray ince,rice,ypodpaly
HXR yes 32 Channels operational Oct 23 2010 01:41PM (parker) Ron Parker Hard X-Ray Array faust,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 working. New directional couplers installed at input to each klystron. Oct 21 2010 11:42AM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg
Lower Hybrid Reflectometer yes 50GHz: up-, 60 GHz up- and down- Oct 21 2010 11:31AM (sgbaek) Arturo Dominguez Lower Hybrid Reflectometer dominguez,marmar,parker,sgbaek
Lower Hybrid SOL reflectometer yes profiles and fluctuations both working. If requested, please request LH launcher to be moved in. Jan 18 2011 03:07PM (cornwall) Cornwall Lau Lower Hybrid SOL reflectometer cornwall,wukitch,ylin
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 vacuum problems fixed, still no wavelength scan - just used as a Mo/Cu/Ni/Fe/Ti monitor. Mar 25 2011 08:25AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Operational. Oct 22 2010 11:46AM (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 no Down due to chiller problem. Mar 25 2011 08:37AM (ntsujii) Miklos Porkolab Phase Contrast Imaging emd,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 no Starting 1110309xxx all channels were operational. On 1110323018 the 75 RCVR was lost. Mar 25 2011 09:19AM (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 yes SSS installed and leak tested. Oct 21 2010 11:31AM (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 Oct 22 2010 01:06PM (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 Raw spectra stored but not line brightness time histories are going into the tree yet. Jan 20 2011 10:45AM (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
Mar 25 2011 09:16:11:940AM	1110325001	Jerry Hughes	Shot 1. Attempt: Load 1101214029 and fire up D+E. Result: J-port was fired too. Need to turn that off for next shot. Ohmic density looks reasonably low. Density screams up after RF come on.
Mar 25 2011 09:55:49:243AM	1110325002	Jerry Hughes	Shot 2. Attempt: Retry without J. Result: D and E run clean at ~1.5MW, L-mode Nasty injections from the divertor slot, from the vicinity of H-J-K, as we've seen in the past. Enable Ne seeding on next shot. WIDE2 looks good again. Thanks, JT!
Mar 25 2011 09:56:28:463AM	1110325003	Jerry Hughes	Shot 3. Attempt: Retry with some Ne seeding. Result: H-modes, No killer injections. Ohmic target desnity looks good. Relatively clean pedestal profiles. Not a lot of SOL coverage. ne,ped is >2e20. Kind of high. First ELM comes at 0.92s. There appear to be others in later H-mode phases of the discharge.
Mar 25 2011 09:58:27:460AM	1110325004	Jerry Hughes	Shot 4. Retry with a little more power Result: Early locked mode and high Prad. No good H-modes
Mar 25 2011 10:04:01:770AM	1110325005	Jerry Hughes	Shot 5. Attempt: Fix early density drop and repeat. Result: Much improved. 5 H-modes. MLR reports plenty of Ar, Ne in the H-modes. ne,ped is touching 2.3e20.
Mar 25 2011 10:29:46:477AM	1110325006	Phil Snyder	Very nice ELMing discharge at standard Bt. Some RF drop outs, but several good ELMing periods. Go to low Bt for next shot.
Mar 25 2011 10:32:30:907AM	1110325006	Jerry Hughes	Shot 6. Attempt: Reduced Ar, Ne. Result: A great ELMy H-mode shot. Steady H-mode, plenty of ELMs. Decent pedestal coverage. ne,ped is still still above 2e20. Pedestal Te looks reasonably high.
Mar 25 2011 10:36:26:460AM	1110325007	Jerry Hughes	Shot 7. Attempt: First attempt at 3.4T, 700kA Result: Early disruption, PF breaker pull. Power supply issue?
Mar 25 2011 10:50:54:300AM	1110325008	Phil Snyder	Successful ELMing shot at 3.5T. Pedestal density appears to have come down slightly, and pedestal pressure is down, as expected.
Mar 25 2011 10:57:27:167AM	1110325008	Jerry Hughes	Shot 8. Attempt: Retry Result: ELMs on the first 3.5 attempt! J-port coming up, tolerating ELMs. ne,ped slightly lower than in the higher-field case. Modest Te,ped in evidence. q95~3.1
Mar 25 2011 11:18:55:593AM	1110325009	Jerry Hughes	Shot 9. Attempt: Repeat with power steps Result: 2 phases of either ELMy H-mode or very rapid dithers to L-mode phases preceding H-L transitions.
Mar 25 2011 11:28:30:737AM	1110325009	Phil Snyder	ELMs in bursts - some may be back-transitions. May not be an ideal shot for pedestal analysis.
Mar 25 2011 11:42:46:397AM	1110325010	Jerry Hughes	Shot 10. Attempt: Repeat with more ICRF demand, reduced Ne. Result: Two H-mode phases at different density. ELMs are interspersed. We continue to see the weakly coherent stuff at 200-300kHz prior to ELM onset, as Arturo pointed out on shot 8. Nothing regular in evidence. A surprising locked mode shows up at 1.3s
Mar 25 2011 12:23:08:740PM	1110325011	Jerry Hughes	Shot 11. Attempt: Repeat Result: H-modes, mostly ELM-free. A few ELM-like events are seen between 1.1s and 1.35s, but the input power is not very steady.
Mar 25 2011 11:59:08:923AM	1110325012	Phil Snyder	Steady ELMing period from ~0.85-1.1s. Pedestal density stays low and fairly steady (~1.7e20).
Mar 25 2011 12:24:17:240PM	1110325012	Jerry Hughes	Shot 12. Attempt: Flat RF 1MW. Result: A decent ELM-free phase, followed by ELMy phase in the first H-mode. Low input power seems to be a key ingredient.
Mar 25 2011 12:28:10:360PM	1110325013	Jerry Hughes	Shot 13. Attempt: Lower power scan. Result: ELMs and dithers. High Prad in the 2nd half of the flattop.
Mar 25 2011 12:29:44:780PM	1110325013	Phil Snyder	Lower RF power to 600kW ramping up to 800kW. Initial ELMs followed by dithering period. No steady H-mode achieved at this power. Very interesting mode seen on the reflectometry preceding the early ELMs. Possible candidate for K(R)BM. Next shot: Move on to lower current, Ip=560kA.
Mar 25 2011 12:34:46:367PM	1110325014	Jerry Hughes	Shot 14. Attempt: Ip=560kA. Result: Got the conditions we wanted. q95~3.7. H-mode triggered after 1s. No clear ELMs. Should try for more power.
Mar 25 2011 12:44:15:677PM	1110325015	Phil Snyder	Series of back-transitions, with no ELMing H-Mode. Try staying at the same RF power, but reducing neon & argon, to see if we can slow radiated power rise.
Mar 25 2011 12:51:14:717PM	1110325015	Jerry Hughes	Shot 15. Attempt: A little more ICRF power Result: Multiple H-modes. Prad rise is fairly swift in each. QCM is in evidence now, but is not giving rise to a steady H-mode.
Mar 25 2011 12:51:51:090PM	1110325016	Jerry Hughes	Shot 16. Attempt: Retry with no Ne, less Ar Result: Dud.
Mar 25 2011 01:11:19:167PM	1110325017	Phil Snyder	Nearly steady ELMing period from ~0.95-1.15s. Pedestal density and temperature are fairly low, as expected at this Ip and Bt.
Mar 25 2011 01:21:04:833PM	1110325017	Jerry Hughes	Shot 17. Attempt: Retry 15 with no Ne, less Ar Result: Multiple H-modes with some big H-alpha spikes preceding the H-L transition. Looks similar to shot 009, at the higher Ip. These ELMs seem to onset when the Te,ped drops _below_ some criticla value. Because we turned off the Ne, this shot has a lower radiated power fraction, so higher net power. Seems like we should go up in power for next shot.
Mar 25 2011 01:26:27:543PM	1110325018	Phil Snyder	Fairly steady ELMing period from ~0.88-1.05s. Pedestal density and temperature low as expected, pressure very roughly 8kPa.
Mar 25 2011 01:37:18:310PM	1110325018	Jerry Hughes	Shot 18. Attempt: Repeat with more power. Result: Some ELMs intermixed with QCM, as on shot 017.
Mar 25 2011 01:47:31:703PM	1110325019	Jerry Hughes	Shot 19. Attempt: Increased power yet again. Result: Long H-mode with slow density rise. Pedestal desnity doesn't come up to the level of the previous shot until about 1s. Shortly after that, there seems to be an ELM. . . Increased RF power just doesn't seem to get us ELMs today.
Mar 25 2011 02:15:42:860PM	1110325020	Jerry Hughes	Shot 20. Attempt: Reduce Ip to 440kA, 1MW flat from J-port Result: Somewhat steady EDA H-mode starting at 0.75s. Density pedestal is down at the 1.5e20 level or below and seems wider at this low Ip.
Mar 25 2011 02:18:10:230PM	1110325021	Jerry Hughes	Shot 21. Attempt: Repeat 20 without the large programed increase in nl04 feedback at 1s. Result: H-mode doesn't last any longer than on 020. J-port has a number of faults. Will try for more power anyway.
Mar 25 2011 02:31:59:927PM	1110325022	Jerry Hughes	Shot 22. Attempt: More power. Result: Yijun coaxes 1.75MW out of J. EDA H-mode, no ELMs. A dramatic injection kills the discharge at 0.92s.
Mar 25 2011 02:39:37:980PM	1110325023	Phil Snyder	Repeat of shot 8 with no neon. Steady ELMing period, as in shot 8, from ~0.8-1.1s.
Mar 25 2011 02:45:29:563PM	1110325023	Jerry Hughes	Shot 23 Attempt: Repeat Shot 8, though with no Ne and 25ms Ar pulse. Result: Ohmic density matches that on shot 008, but the pedestal density is considerably lower. ELMs are higher frequency. Density begins to rise concurrent with the disappearance of the rapid ELMs around 1.1s. Cause/effect? This about the same time that the NINJA is puffing and the RF is ramping. For next shot let's have the RF ramp 100ms sooner and have NINJA puff 100ms later.
Mar 25 2011 02:58:35:693PM	1110325024	Jerry Hughes	Shot 24 Attempt: Ramping power in the 700kA, 3.5T case. Result: ELMs continue to disappear at the higher powers, and the ELM-free periods show considerable rate of rise in density, Prad. There seems to be a very narrow window in power for these ELMs.
Mar 25 2011 03:08:52:387PM	1110325025	Phil Snyder	Interesting shot. The RF waveform is reversed, with high power first and then lower power. Steady ELM period from ~0.9-1s at 2MW, and then another steady ELM period from ~1.1-1.25s at the lower power ~1MW. Clearly indicates that low power is not a requirement for getting ELMs, but there do seem to be differences between the early and later phases of the discharge.
Mar 25 2011 03:12:57:563PM	1110325025	Jerry Hughes	Shot 25. Attempt: Start at high power and then reduce. Result: Interesting shot. Putting 2MW in early seems to work just fine at triggering ELMs. Confinement is good early on, and then very regular ELMs onset at 0.88s. Confinement is poorer in the ELMy phase Subsequent H-modes exhibit a similar pattern, with gradual confinement degradation throughout the shot.
Mar 25 2011 03:17:55:460PM	1110325026	Phil Snyder	Steady ELMing period from ~0.85-1.05s. Should be a good case for analysis. After 1.05s there is an RF cutout and back-transition, and the 2nd H-mode is different from the 1st.
Mar 25 2011 03:19:20:890PM	1110325026	Jerry Hughes	Shot 26 Attempt: Maintain flat RF and try to prolong the ELMy H-mode. Initial H-mode looks great. Lots of ELMs after 0.845s., very regular. RF trip at 1.07s seems to lead to a back-transition from which we do not recover another good ELMy H-mode.
Mar 25 2011 03:29:09:503PM	1110325027	Jerry Hughes	Shot 27. Attempt: Raise nl04 demand from 5e19 to 6.5e19. Result: ne,ped came up. ELMS went away. J-port at 2MW with a few faults.
Mar 25 2011 03:45:39:387PM	1110325028	Jerry Hughes	Shot 28. Attempt: lower density at fixed power Results: Beautiful shot with low, steady H-mode density and lots of ELMs. But no Thomson. Have to retake it.
Mar 25 2011 04:00:18:407PM	1110325029	Jerry Hughes	Shot 29 Attempt: Repeat 28 with Thomson. Result: Shot starts out the same, except for a small excess in Prad at 0.777s. I think the first ELM knocks out the RF. Again, once the RF faults and tries to recover into a new H-mode, there seems to be no getting back the nice ELMs.
Mar 25 2011 04:00:59:277PM	1110325029	Phil Snyder	Unfortunately, not a great repeat of shot 28. Get 3 back-transitions early on, and an ELMing period later, but presumably with conditions altered by the back transitions.
Mar 25 2011 04:11:09:303PM	1110325030	Phil Snyder	Early steady ELM period from ~0.78-1.0s, but short-lived. Very low pedestal density during ELMing phase.
Mar 25 2011 04:14:36:667PM	1110325030	Jerry Hughes	Shot 30. Attempt: Repeat 28 with no RF trip, Thomson. Result: There is an RF trip at 0.76, but it does not prevent the reformation of ELMy H-mode. The density in the first H-mode ends up being lower than on shot 28, and the ELMs are higher frequency.
Mar 25 2011 04:21:22:843PM	1110325031	Phil Snyder	Good shot. Steady ELMing period at very low pedestal density (~1.2e20), from ~0.8-1.15s.
Mar 25 2011 04:31:27:690PM	1110325031	Jerry Hughes	Shot 31. Attempt: Repeat 28 with no RF trip, Thomson. Result: More high frequency ELMs in a low density H-mode, followed by later H-mode with lower frequency ELMs.
Mar 25 2011 04:37:14:543PM	1110325032	Phil Snyder	Current back down to 0.56MA. Early injection at ~.78s, followed by a fairly steady ELMing period from ~0.86-1.04s. Low pedestal density ~1.1e20.
Mar 25 2011 04:40:38:453PM	1110325032	Jerry Hughes	Shot 32 Attempt: 560kA, nl04~3e19 Result: Low density ELMy H-mode followed by a moderate density H-mode. Last H-mode appears solidly EDA. . . He puff assisted?
Mar 25 2011 04:50:22:457PM	1110325033	Jerry Hughes	Shot 33 Attempt: Repeat shot 32 with no He NINJA puff, and no injection early in H-mode, and with Thomson, and with steady RF . . . Result: Decent ELMy period from 0.92 to 1.06, with ELM frequency changing as other plasma parameters like density change.
Mar 25 2011 05:10:42:530PM	1110325034	Phil Snyder	Good shot with ELMs at very low current, Ip~0.44MA. Steady ELM period from t~0.8-1.02s. Interesting fluctuations on the magnetics and reflectomer. Appears between ELMs and then transitions smoothly into QC mode.
Mar 25 2011 05:22:29:580PM	1110325034	Jerry Hughes	Shot 34 Attempt: Ip to 440kA, density reduced from shots 20--22. 1MW from J. Result: This worked well. Nice regular ELMing period between 0.8s and 1.05s. Profiles look great. Arturo has nice stuff. Everybody's got a warm buzz.

Physics Operator Comments
Mar 25 2011 09:12:04:473AM	1110325001	Steve Scott	Changes from reference shot 1101214029: 1) increase early NeL demand from 4.0e19 to 5.0e19 2) decrease argon puff to 25 ms result: PRF = 1-2 MW, ratty waveforms. plasma disrupts at 1.08 sec We got some power from J antenna, despite lack of He3 puffing. Got quite a large density increase (to 1.4e20) during RF.
Mar 25 2011 09:29:59:600AM	1110325002	Steve Scott	physOp changes from previous shot: increase Argon puff from 25 ms to 80 ms. result: disrupted at 1.18 sec. interferometer seems to have had a problem at about 0.2 sec. clean RF waveform. Power ramps from 1.0 to 2.0 MW.
Mar 25 2011 09:35:32:940AM	1110325003	Steve Scott	change from previous shot: enable H-bottom. puff neon at 40% from 0.4 to 0.6 sec. note: pressure in H-bottom is 3.8 psi. result: better. plasma disrupts in rampdown at 1.7 sec. RF = flat at 2.0 MW with some faults. several ELM-free periods.
Mar 25 2011 09:54:38:620AM	1110325004	Steve Scott	result: disrupts in rampdown at about 1.6 sec. No H-modes. locked mode from 0.58 to 0.84 sec. lost D-antenna at 1.13 sec.
Mar 25 2011 10:00:51:477AM	1110325005	Steve Scott	change from previous shot: increase early NeL demand. Demand is still 5.e19, but will reach that density at t=0.23 sec. result: 5 nice H-modes. plasma survives into rampdown, t=1.7 sec. RF power to 2 MW.
Mar 25 2011 10:17:04:053AM	1110325006	Steve Scott	changes from previous shot: 1) decrease argon puff to 40 ms 2) decrease neon puff to 30% result: nice shot. full length.
Mar 25 2011 10:43:49:640AM	1110325007	Steve Scott	changes from previous shot: BT to 3.4 Tesla. Ip = 0.70 MA. result: disrupts at t=0.59 sec. there was a spike on OH1-voltage
Mar 25 2011 10:48:29:690AM	1110325008	Steve Scott	no physOp changes from previous shot. result: full length shot. SL is happy. TF = 3.503 Tesla
Mar 25 2011 11:11:25:597AM	1110325009	Steve Scott	physOp changes from previous shot: none result: full length shot. nice shot. similar to shot 8.
Mar 25 2011 11:35:29:517AM	1110325010	Steve Scott	Requested fill pressure in H-bottom (neon) to be reduced from 3.8 to 2.5. Will leave gas programming on PG5 unchanged. result: disrupts at t=1.37 sec. possible locked mode? Disruption doesn't appear to have been caused by an injection.
Mar 25 2011 11:45:33:723AM	1110325011	Steve Scott	physOp changes from previous shot: no changes. result: full length shot. PRF to 2.4 MW. RF waveform is a little ratty.
Mar 25 2011 11:57:24:820AM	1110325012	Steve Scott	physOp changes from previous shot: none. RF will try to get power constant in time. result: full length shot. Nice shot. PRF = 1.0 MW.
Mar 25 2011 12:10:05:540PM	1110325013	Steve Scott	physOp changes from previous shot: none. Will ask for a stepped RF waveform, 0.5 --> 0.7 MW result: plasma survives into rampdown.
Mar 25 2011 12:26:24:950PM	1110325014	Steve Scott	physOp change from previous shot: decrease Ip to 0.56 MA result: plasma survives into rampdown. RF = 0.5 --> 0.7 MW
Mar 25 2011 12:40:13:313PM	1110325015	Steve Scott	physOp changes from previous shot: none Will increase RF power. result: plasma survives into rampdown. 5 nice H-modes. PRF = 1.1 - 1.4 MW
Mar 25 2011 12:51:27:907PM	1110325016	Steve Scott	physOp changes: 1) disable h-bottom (neon) 2) reduce argon puff from 40 to 25 ms result: dud. problem with EF1-upper
Mar 25 2011 01:06:47:987PM	1110325017	Steve Scott	no physOp changes. result: full-length shot.
Mar 25 2011 01:23:40:260PM	1110325018	Steve Scott	no physOp changes this shot. raise RF power. result: full length shot.
Mar 25 2011 01:37:04:710PM	1110325019	Steve Scott	no physOp changes. result: full-length shot.
Mar 25 2011 01:45:22:990PM	1110325020	Steve Scott	physOp change: Ip --> 440 kW PRF=1.0 MW result:
Mar 25 2011 02:02:56:843PM	1110325021	Steve Scott	physOp change: decrease 'failsafe' density programming from 8.0e19 to 6.0e19 result: full length shot.
Mar 25 2011 02:22:36:973PM	1110325022	Steve Scott	phyOp changes: none. Will try to increase PRF. result: hard disruption at t=0.92 sec. Video shows glowing things flying thru the vacuum vessel.
Mar 25 2011 02:27:01:083PM	1110325023	Steve Scott	Reload shot 8 from today. But note that we currently have disabled H-bottom (neon) . also reduce argon puff to 25 ms.
Mar 25 2011 02:28:25:100PM	1110325023	Steve Scott	Reload shot 8 from today. But note that we currently have disabled H-bottom (neon) . also reduce argon puff to 25 ms. result:
Mar 25 2011 02:48:08:197PM	1110325024	Steve Scott	no physOp changes. NINJA will move its puff 100 ms later in time. small adjustment to PRF request: move forward 100 ms. result: full length shot.
Mar 25 2011 03:00:21:040PM	1110325025	Steve Scott	no physOp changes. RF waveform will be reversed: high power initially followed by lower power result: full length shot. nice shot.
Mar 25 2011 03:13:26:760PM	1110325026	Steve Scott	No physOp changes. try to get constant RF power waveform. result: full length shot.
Mar 25 2011 03:17:56:537PM	1110325027	Steve Scott	physOp change: increase target NeL from 5.0e19 to 6.5e19.
Mar 25 2011 03:41:01:013PM	1110325028	Steve Scott	decrease target NeL to 4.0e19 result: very nice shot. good ELMs. full length alas, it looks like we got no Thomson data. So we need to take this shot again.
Mar 25 2011 04:07:09:077PM	1110325030	Steve Scott	sscott DNB Mar 25 2011 03:54PM Edit Delete no physOp changes. Hope to get a good plasma and Thomson data on the same shot. small injection at t=0.15 sec
Mar 25 2011 04:16:49:747PM	1110325031	Steve Scott	IMPORTANT NOTICE: the DNB will attempt to change over into deuterium for the last 1-2 shots today. no physOP changes this shot. result: full length shot.
Mar 25 2011 04:31:29:030PM	1110325032	Steve Scott	set IP to 0.56 MA result: full length shot. NOTE: this shot has the DNB in deuterium. So neutron emission is not an indicator of Ti in this shot.
Mar 25 2011 04:42:59:407PM	1110325033	Steve Scott	no physOp changes. NINJA puffing has been turned off. DNB is still in deuterium.
Mar 25 2011 04:56:53:520PM	1110325034	Steve Scott	no PhysOp changes. good shot. End of run.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:04:33:630AM	Plasma	Ok
2	09:17:06:643AM	Plasma	Ok
3	09:30:40:360AM	Plasma	Ok
4	09:43:18:043AM	Plasma	Ok
5	09:56:35:563AM	Plasma	Ok
6	10:11:35:453AM	Plasma	Ok
7	10:29:00:857AM	Plasma	Bad	OH1 spowered ciruit
8	10:44:01:080AM	Plasma	Ok
9	11:07:30:493AM	Plasma	Ok
10	11:24:31:967AM	Plasma	Ok
11	11:39:54:343AM	Plasma	Ok
12	11:53:21:163AM	Plasma	Ok
13	12:07:33:000PM	Plasma	Ok
14	12:21:50:117PM	Plasma	Ok
15	12:35:46:540PM	Plasma	Ok
16	12:49:00:113PM	Plasma	Bad	EF1 Upper power supply fail
17	01:04:43:120PM	Plasma	Ok
18	01:18:38:383PM	Plasma	Ok
19	01:33:41:240PM	Plasma	Ok
20	01:46:07:493PM	Plasma	Ok
21	01:58:42:077PM	Plasma	Ok
22	02:18:27:560PM	Plasma	Ok
23	02:30:52:297PM	Plasma	Ok
24	02:43:59:700PM	Plasma	Ok
25	02:56:38:270PM	Plasma	Ok
26	03:09:46:163PM	Plasma	Ok
27	03:22:18:463PM	Plasma	Ok
28	03:34:39:903PM	Plasma	Ok
29	03:46:55:507PM	Plasma	Ok
30	03:59:21:517PM	Plasma	Ok
31	04:13:11:737PM	Plasma	Ok
32	04:27:25:903PM	Plasma	Ok
33	04:39:45:177PM	Plasma	Ok
34	04:52:11:607PM	Plasma	Ok