Alcator C-Mod Run 1100209 Information

Miniproposals

Miniproposal: 593

Date Filed: 1/10/2010

Title: Vertical Equilibrium Shifts for Triggering ELMs

First Author: Jerry Hughes

Session Leader: Jerry Hughes (shots 1-31)

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

Engineering Operator Run Comment
MP 593: Vertical equilibrium shifts for triggering ELMs Session leader:

Session Leader Plans

Entered: Feb 9 2010 06:01:11:870AM

Author: Jerry Hughes

Run plan for 1100209
MP 593: Vertical equilibrium shifts for triggering ELMs
SL: Jerry Hughes
PO: Ron Parker

Prep:

-- Overnight boronization followed by He, then D2, ECDC
-- Working Gas Species: Deuterium
-- ICRF at 80 MHz at 4--5 MW level.
-- Special gas puffing:
1psi Ar puff enabled, puff at 0.3s, 50ms in length
10psi D2 NINJA puff enabled for GPI, CXRS --- please consult SL before
triggering NINJA puff.
-- A-Coils: Standard configuration
-- LBO may piggyback near end of flattop --- please request SL permission
before actually firing.
-- Cryopump should be available for beginning of run

Required Diagnostics and their set up:
1.) Edge TS, no position changes.
2.) ECE. Optimize for pedestal top
3.) 0-D Fast D-alpha for ELM timing
4.) Fast magnetics. Digitize for full length of shot.
5.) Fast EFIT set up from 0.8 to 1.1s

Desired diagnostics:
1.) Passive and GP-assisted CXRS.
2.) PCI. Unmasked configuration, digitizing from 0.4 to 1.6s.
3.) Reflectometer. Set 0.5s digitization window to begin at 0.8s.
4.) Fast D-alpha GPI.
5.) Bolometry.
6.) Lyman alpha.
7.) HIREX Sr.

Run plan:

1. Reproduce 1100202017, keeping Ip, nl04 demand the same. Also leave ZCUR as
programmed, with a 40ms modulation period and 1ms rampup/rampdown from 0.9 to
1.4s. RF program should ramp from 1.5MW to 3.5MW from 0.6 to 0.8s, and stay
flat at 3.5MW until 1.5s. The difference now is that we will use the cryopump.

It will take a few shots to recover from boronization and to bring up the RF.
Once a full length H-mode is achieved, repeat with the ZCUR modulation removed.

If added pumping prevents us from achieving the same conditions achieved on
1100202017, then try a shot with the cryopump warm.

GOAL OF PART 1: Recover from boronization and establish a high power EDA
H-mode. Compare the jogged vs. unjogged case.
APPROX. # OF SHOTS: 5--7

2. Raise RF flattop to max. available power. Begin shot-by-shot density scan,
with ZCUR modulation. This should both reduce EDA access and give us hotter
pedestals. Try L-mode target nl04 of 8e19, 7e19 and 6e19. Look for ELMs.

GOAL OF PART 2: Try to promote ELM triggering by lowering collisionality.
APPROX. # OF SHOTS: 3--4

3. Test modulation scheme at higher Ip. Keep similar RF power trace.

a. Try 1.0MA with target nl04=1e20. Based on SMW's latest simulations, we should
reduce modulation amplitude demand to 0.004m in order to prevent overshoot.

b. If the 1.0MA case is stable, raise Ip to 1.1MA. Lower modulation amplitude
demand to 0.0025m.

c. If neither (a) nor (b) is stably modulated, lower Ip to 0.9MA. Set modulation
amplitude demand to 0.004m with target nl04=9e19.

GOAL OF PART 3: Try to use the scheme in higher confinement H-modes with more
ELM-free qualities. Document any changes in the plasma introduced by jogs.
APPROX. # OF SHOTS: 4--6

4. In the highest current case that was stable (if that was 0.9MA or more), try a
density scan down in increments of 2e19 until 6e19 is reached. Keep similar RF
power trace.

GOAL OF PART 4: Combining goals of 2 and 3.
APPROX. # OF SHOTS: 0--3

5. a. If ELMs have been triggered at any point, repeat the successful discharge
and see whether some degree of ELM pacing is possible by varying the drive
frequency shot-to-shot over the range of 20--100Hz.

b. If ELMs have not been triggered in 1--4, then find a suitably stationary
H-mode with modulation and raise the baseline ZCUR so that the upswing of the
modulation takes the discharge just through double null. Look for changes in
the H-mode, including ELMs.

GOAL OF PART 5:
APPROX. # OF SHOTS: 4--6

6. If we exhaust steps 1--5 with no ELMs, and there's time, try to make an I-mode
and see if we can trigger ELMs there. Keep similar RF power trace.

a. Load shot 1091203015 (1.2MA, 5.6T). Insert ZCUR modulation from 0.9 to 1.4s.
Parameters: ModMax= -.004m, ModMin=0.0m , trampup/down=.002 s

b. Load shot 1100204014 (1.35MA). Insert ZCUR modulation from 0.9 to 1.4s.
Parameters: ModMax= -.004m, ModMin=0.0m , trampup/down=.002 s

GOAL OF PART 6: Shake and bake.
APPROX. # OF SHOTS: whatever's left

Physics Operators Plans

Entered: Feb 8 2010 05:38:00:910PM

Author: Ron Parker

-----------------
Engineering Setup for Tuesday, 1100209
-----------------

MP 593: Vertical equilibrium shifts for triggering ELMs

Session leader: Hughes
Physics operator: Parker

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

Power systems as on: 1100202017

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 ENABLED for GPI

Enable gatevalves and shutters: ECE, VUV, HiREX Sr, Z-bolo

Torvac gatevalve toggle (yes/no): no

Boronization(yes/no): yes, overnight
Overnight ECDC (yes/no): He 2 hours then D2 1 hour following boronization, see below
ICRF(yes/no): yes, Prf = 4 -5 MW level
LH(yes/no): no
Cryopump (yes/no): yes, ready for the start of the run

Vessel temperature: 35/35/35

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

Post boronization ECDC
----------------------------
1st Gas Setup:
Gas: He
sweep: 44/45/103 cm
scan: 20/120 s
Pressure: 5.0e-5 Torr
Duration: 2 Hour

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

Session Leader Summaries

Entered: Feb 9 2010 05:23:32:617PM

Author: Jerry Hughes

Here is a short initial summary:

Despite some data system delays and a number of pesky fizzles, we got a lot
of interesting stuff today.

Significant accomplishments included:

1.) Reestablishment of modulation scheme @25Hz in 800kA EDA H-modes. (Shot 012)
2.) Established modulation scheme @25Hz in 800kA ELM-free H-modes. (016)
3.) Established modulation scheme @25Hz in 1MA ELM-free H-modes. (023)
4.) Established modulation scheme @25Hz in 1MA EDA H-modes. (017,019,022)
5.) Established modulation scheme @70Hz, 100Hz and ~200Hz in 1MA EDA H-modes.
(024,025,028,030)
6.) Demonstrated some degree of triggering and/or synchronization of small
ELMs, and compared directly with a case with no modulation.
(017,019,022,024,025,028,029,030)

As an initial scoping study went, this was very successful. Small ELMs were
triggered in a number of cases, although they seemed to have very little
instantaneous effect on the edge pedestal and confinement. Future work should
concentrate on trying to find operational space and perhaps more aggressive
jog parameters where larger ELMs can be triggered.

Physics Operator Summaries

Entered: Feb 9 2010 04:47:56:027PM

Author: Ron Parker

Shot 27 fizzled

Entered: Feb 9 2010 05:11:18:130PM

Author: Ron Parker

This run followed an overnight boronization, after which followed 3 hours of discharge cleaning, 2 hrs in helium and 1 hour in deuterium.

The run proceeded with a few short delays in the morning due to hangups in the engineering action monitor and data systems.Fortunately the delays were fairly short and the problems were quickly resolved thanks to Josh.

The main problem today was the lack of a consistent startup, resulting in many fizzles or early disruptions. Nevertheless the good shots that were obtained with vertical position modulation were interesting and seemed to clearly demonstrate the use of the modulation technique to pace or cause ELM's, to the extent that they could be identified on the H alpha emission.

Scorecard: 29 attempts at plasma, 2 no power shots

16 full length shots
9 fizzles
3 disruptions >= 1 s

Session Leader Comments

Feb 9 2010 09:08:40:473AM 1100209001 Jerry Hughes No power shot.

Feb 9 2010 09:42:04:833AM 1100209002 Jerry Hughes Injection at 0.92s. Disrupts at about 1s. No obvious H-mode. You can see the
modulation on the H-alpha. Got through 2 modulation cycles and it disrupts on
the 3rd. Magnetics data is lost.

Feb 9 2010 09:53:20:900AM 1100209003 Jerry Hughes Fizzle.

Cell access for 3 grad students (see how they run . . .)
PO is a grumpy gus about it.

Feb 9 2010 10:08:25:233AM 1100209004 Jerry Hughes Turning off modulation for this shot.
Progress! 800kA. Long EDA H-mode. Density trace looks pretty good.
No RFNET data, but Wukitch says the transmitters look like they gave 1MW,
ramping to 3MW. One fault from J.
We are missing some additional data: Bolos, GPC, edge TS.
Peak Wp is close to 120kJ. 1100202017 had 125--130kJ.

Feb 9 2010 11:05:32:253AM 1100209005 Jerry Hughes Data came in. RF ramp is looking fairly good. Prad is low.
Long EDA H-mode.
WE are heating up the outer divertor tiles (4th and 3rd row, no sign of tungsten
yet.)
No TS data, due to a YAG problem.

Feb 9 2010 11:06:19:147AM 1100209006 Jerry Hughes More power early. Up to 4MW at 0.8s. Nice pedestal, but a big W injection
at 0.87s. Another H-mode at 1s .
For next shot, back off power demands.

Feb 9 2010 11:15:50:427AM 1100209007 Jerry Hughes Better. Long EDA H-mode. Peak Wp of 145kJ. beta_n=1.34. H98=1. Small-ELM-like
hash in the high confinement phase.
Small injection at 1s blows it away.
Great RF trace. Flat at 3MW. E faults starting after 1.1s, but no big deal.

Next shot: Time to modulate. Put the modulation back in from 0.9 to 1.4s

Feb 9 2010 11:20:39:500AM 1100209008 Jerry Hughes Fizzle.

Feb 9 2010 11:35:11:657AM 1100209009 Jerry Hughes Fizruption.

Time to crank out the Fiz Rev Letter.

Feb 9 2010 12:05:52:900PM 1100209010 Jerry Hughes EDA H-modes with modulation.

First H-mode is humming along quite nicely before the modulation begins at 0.9s.
Looks okay on the upswing, but on the downswing we start to raise the radiation.
Prad grows until there is an injection at about 1s.

2nd H-mode is better. Prad does not continuously increase, although there
is still an injection.

Speculation is that the strike is simply too low on the divertor. We still see
big dTs (>100C) on both the 3rd and 4th row of tiles. Matt has given me
the safe word.

NExt shot will try to raise strike by mean rise in Z position.
PO is raising ZCUR program by 3mm, and decreasing modulation demand to 5mm only.

Feb 9 2010 12:07:46:963PM 1100209011 Jerry Hughes Fizzzzzz

Feb 9 2010 01:03:52:517PM 1100209012 Jerry Hughes Long EDA H-mode with higher ZCUR than before, reduced modulation demand.
Upswings are ~7mm, and downswings are ~10mm.
Prad decreases during H-mode, as observed last week. The decrease continues
after the modulation ceases, though.
By the end of the shot, confinement has improved considerably. Hash on D-alpha, ICRF comes back.
Frequency of QCM is dhifted with the dz modulation on PCI and magnetics.

Feb 9 2010 12:44:13:103PM 1100209013 Jerry Hughes Fizruption

Feb 9 2010 12:55:08:060PM 1100209014 Jerry Hughes Fizzle.

Feb 9 2010 01:13:49:770PM 1100209015 Jerry Hughes We're back. We got the lower density. RF is less happy now, and they need to
retune.
Multiple H-modes, ELM-free. There is a hint of QCM at 0.97--1.0s.

Next shot: retry.

Feb 9 2010 01:37:46:203PM 1100209016 Jerry Hughes ELM-free H-modes. The 2nd one stays at a high level of confinement for 80ms,
before the Prad takes off. Maybe the modulation reduced the rate-of-rise? It's
not easy to judge.
There are hints of a weak QCM in the latter H-modes

Next: Move on the 3a. Higher Ip.

Feb 9 2010 01:49:14:533PM 1100209017 Jerry Hughes RF tune needs work.
2 H-modes, pretty cold. It's hard to make anything out of the hash on H-alpha,
but there does seem to be a tendency for it spike whenever there's a
downward stroke on the vertical modulation. Are we pacing Type III ELMs?

Feb 9 2010 02:03:58:900PM 1100209018 Jerry Hughes Fizzle.

Feb 9 2010 02:23:22:910PM 1100209019 Jerry Hughes Long steady EDA H-mode, ~2.5MW of RF. Fairly dense. Teped,max~400eV.
Seems to be a lot of variation in the reported pedestal parameters from TS, even
though the confinement seems to be monotonically decreasing throughout the
H-mode. Perhaps aliasing with the modulation?

There still tend to be blips at regular intervals in the H-alpha. They seem
to be correlated with both the upswings and the downswings this time. There
are plenty of blips that are uncorrelated with the programmed jogs as well.

Feb 9 2010 02:24:02:140PM 1100209020 Jerry Hughes This is a magical shot with no actual plasma, but a lot data traces which
are identical to those on shot 19.

Feb 9 2010 02:39:45:773PM 1100209021 Jerry Hughes Rough shot. Bad ramp-up.Moly brick. No ICRF. Modulation goes unstable.

Feb 9 2010 03:00:39:953PM 1100209022 Jerry Hughes Radiative, pretty early. RF is clean, but the core radiation leads us to be
underpowered. There are blips in D-alpha between 0.9 and 1.1 are correlated with
the rises and the falls.

There's probably not much I can do about the high core radiation here, so let's
proceed to lower the density at this Ip. (I don't want to go to 1.1MA.)

Feb 9 2010 03:19:22:507PM 1100209023 Jerry Hughes Several ELM-free H-modes. Looks like there are some paced blips. If they are ELMs
they don't seem to be relaxing the pedestal at all.

Next: Go back to 22 and increase rate of modulation. Period will be 14ms.

Feb 9 2010 03:35:10:140PM 1100209024 Jerry Hughes 1.0MA, target nl04=1e20
Long, nominally EDA H-mode. It looks like we trigger again on the rises and
falls. But, now we are at ~70Hz.
Amanda reports some interesting crash-like behavior on several edge ECE channels
---maybe a density effect.

Feb 9 2010 03:53:06:287PM 1100209025 Jerry Hughes Trying a 10ms period on the modulation.
Result is pretty cool. Spikes on the D-alpha are very fast now, peaking in
activity between 1.1 and 1.4s. Radiation is fairly under control.

Next: Be aggressive and try for 200Hz modulation.

Feb 9 2010 03:59:32:053PM 1100209026 Jerry Hughes Fishizzle.

Feb 9 2010 04:22:28:563PM 1100209027 Jerry Hughes Fizzle.

Feb 9 2010 04:32:00:490PM 1100209028 Jerry Hughes A most excellent shot. Very distinct spikes on the D-alpha (and RF) coinciding
with the modulation period. Radiation is nearly flat, decreasing toward the end
of the shot. The ELMs are not exactly regular.

Feb 9 2010 04:44:50:103PM 1100209029 Jerry Hughes Turned off modulation. ELMs go away, but the global behavior of the shot
is otherwise the same!
So the ELMs are triggerable, but they do nothing. Welcome to C-Mod.

Feb 9 2010 04:59:47:890PM 1100209030 Jerry Hughes Reload the 200Hz modulation and attempt to bring the RF power up.
The step up in RF wasn't entirely successful. Yijun will try to improve
for next shot.
Otherwise pretty similar to 28.

Feb 9 2010 05:05:09:720PM 1100209031 Jerry Hughes This was the finest fizzle so far today.

Physics Operator Comments

Feb 9 2010 08:53:22:140AM 1100209001 Ron Parker All systems are functioning and run should start promptly at 9:00

Feb 9 2010 09:08:28:490AM 1100209001 Ron Parker Shot 1 coming up, keep in mind the machine was boronized, the gas valve control status is unknown, and the cryo is on. It may take several shots to recover a discharge.

Action monitor misfunctioned (engineering), no power shot.

Feb 9 2010 09:11:36:883AM 1100209001 Ron Parker Josh is looking into the action monitor problem.

Feb 9 2010 09:18:11:150AM 1100209001 Ron Parker Try again

Feb 9 2010 09:26:21:340AM 1100209002 Ron Parker Shot started up, but disrupted at ~ 1 s.

Data system hungup. Josh is looking into it.

Meanwhile, Willy confirms that the chopper board is installed in the gas control circuit.

Feb 9 2010 09:39:10:067AM 1100209002 Ron Parker Diagnostic gate valves are not closing at overpressure trip.

Maybe related to a mod put in by Joe -- Andy is trying to find him.

Feb 9 2010 09:43:05:880AM 1100209002 Ron Parker Action monitor hung up again. Josh is on it.

Shot 1 magnetics data are lost.

Feb 9 2010 09:43:58:973AM 1100209002 Ron Parker Trying again.

Feb 9 2010 09:50:03:650AM 1100209003 Ron Parker Well after all that, the shot fizzled. Perhaps a little too much gas, but maybe not. We'll shoot it again and see. Meanwhile, the first cell access of the day.

Feb 9 2010 09:57:22:713AM 1100209003 Ron Parker Just to make things simpler during the tuneup phase, we have removed the Zcur modulation for the next shot.

Feb 9 2010 10:09:46:467AM 1100209004 Ron Parker So finally a decent shot.

Looks like we'll have to add a bit more prefill, breakdown gas pressure ~ 0.05 mTorr. Increase PG pulse from 50 to 55 ms.

RF data system problems

Feb 9 2010 10:11:14:220AM 1100209004 Ron Parker Trying to recover RF data

Feb 9 2010 10:19:41:673AM 1100209004 Ron Parker Holding for Josh

Feb 9 2010 10:51:17:453AM 1100209005 Ron Parker Shot 5 ran full length. No Zcur modulation.

Next: Bring RF up earlier to 4 MW power

Feb 9 2010 11:02:07:033AM 1100209006 Ron Parker Shot 6 ran full length, RF still tuning up.

Feb 9 2010 11:13:20:773AM 1100209007 Ron Parker Shot 7 ran full length.

Next: Zcur modulation on, loaded segment 2 from 1100209002

Feb 9 2010 11:27:49:967AM 1100209008 Ron Parker Shot 8 fizzled. Looks like a poor startup

Try again

Feb 9 2010 11:44:32:097AM 1100209009 Ron Parker Shot 9 disrupted very early, ~ 100 kA.

RGA died at 11:03

Feb 9 2010 12:05:50:450PM 1100209010 Ron Parker Shot 10 ran with modulation.

Next Raise Zcur 3 mm, and reduced modulation from 7mm to 5mm

Feb 9 2010 12:10:21:200PM 1100209011 Ron Parker Shot fizzled/disrupted. Try again, hoping new Zcur position and modulation will put the strike point in a better location.

Feb 9 2010 12:33:38:380PM 1100209012 Ron Parker Shot 12 ran full length with Zcur modulation.

Feb 9 2010 12:39:45:977PM 1100209013 Ron Parker Disruption/fizzle.

At Steve's suggestion, raise EF4 to -1300 from -1315

Feb 9 2010 01:02:29:313PM 1100209014 Ron Parker Shot fizzled.

Reset EF4 to -1315, add 5 ms more gas -- pulse = 60 ms

Josh wants a hold

Feb 9 2010 01:45:34:753PM 1100209015 Ron Parker Shot 15 disrupted at ~ 1.2 s

Feb 9 2010 01:46:28:830PM 1100209016 Ron Parker Shot 16 ran full length, in and out of H-modes

Feb 9 2010 01:49:42:800PM 1100209017 Ron Parker Shot 17 went full length.

Current was raised to 1 MA, density to 1e20 m-2 and Zcur modulation was changed.

RF was ragged.

Feb 9 2010 01:52:35:880PM 1100209018 Ron Parker Fizzle

Feb 9 2010 02:19:50:220PM 1100209019 Ron Parker Shot 19 ran full length.

Errors showing up on Init prior to shot 20. No power shot coming up.

Feb 9 2010 02:30:12:050PM 1100209020 Ron Parker Shot 20 was a no power shot.

Feb 9 2010 02:45:41:510PM 1100209021 Ron Parker Shot 21 disrupted at ~ 1 s

Feb 9 2010 02:54:47:030PM 1100209022 Ron Parker Shot 22 ran full length

Feb 9 2010 03:16:57:210PM 1100209023 Ron Parker Shot 23 ran full length. Density target @ 0.8e20 m-2.

Next 70 Hz modulation

Feb 9 2010 03:35:02:263PM 1100209024 Ron Parker Shot 24 ran full length

Feb 9 2010 03:38:43:890PM 1100209025 Ron Parker Shot 25 ran full length, a fairly nice shot

Feb 9 2010 04:01:17:210PM 1100209026 Ron Parker Fizzle

Feb 9 2010 04:48:16:823PM 1100209028 Ron Parker Shot 28 ran full length

Feb 9 2010 04:45:43:667PM 1100209029 Ron Parker Shot 29 ran full length -- no Zcur modulation.

Feb 9 2010 04:50:14:073PM 1100209030 Ron Parker Shot 30 ran full length, with modulation and higher (than shot 28) RF power.

Feb 9 2010 05:05:59:517PM 1100209031 Ron Parker Fizzle

Engineering Operator Comments

Shot Time Type Status Comment

2 09:18:39:510AM Plasma Ok

3 09:44:25:740AM Plasma Ok

4 09:58:16:120AM Plasma Ok

5 10:38:23:947AM Plasma Ok

6 10:51:30:470AM Plasma Ok

7 11:05:27:350AM Plasma Ok

8 11:18:27:623AM Plasma Ok

9 11:31:24:747AM Plasma Ok

10 11:45:18:580AM Plasma Ok

11 12:05:03:370PM Plasma Ok

12 12:18:21:767PM Plasma Ok

13 12:33:36:223PM Plasma Ok

14 12:49:53:077PM Plasma Ok

15 01:04:53:877PM Plasma Ok

16 01:18:41:837PM Plasma Ok

17 01:34:38:297PM Plasma Ok

18 01:49:30:130PM Plasma Ok

19 02:02:52:713PM Plasma Ok

20 02:16:56:030PM Plasma Bad No power shot. Critical failure during init

21 02:31:56:393PM Plasma Ok

22 02:45:11:480PM Plasma Ok

23 02:59:32:593PM Plasma Ok

24 03:17:10:600PM Plasma Ok

25 03:35:12:310PM Plasma Ok

26 03:51:56:317PM Plasma Ok

27 04:04:58:697PM Plasma Ok

28 04:19:30:203PM Plasma Ok

29 04:34:35:693PM Plasma Ok

30 04:47:39:433PM Plasma Ok

31 05:00:46:453PM Plasma Ok

System Availability

Feb 9 2010 08:09:38:187AM

GPC and GPC2 morning test shots OK.

Feb 9 2010 09:18:14:090AM

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 7 horizontal views spread out R_maj=[0.72-0.9m], 3 cm over the tokamak midplane (beam) Jul 09 2009 05:12PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan
Bolometers yes 2pi (diode+foil), AXA, AXJ, WB3AX, WB4AX, LEDGE-AX working fine. MID-FOILS working fine. The LEDGE/DIV foils still need calibrations applied Aug 27 2009 09:09AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization yes Nov 13 2009 06:37AM (dekow) Jim Irby Boronization dekow,irby
CNPA no Single channel CNPA available as of 12/1707 Jun 10 2009 10:22AM (twf) Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor yes Operational Nov 09 2009 09:12AM (irby) Brian LaBombard Upper Divertor Cryopump irby,labombard
CXRS yes The wide-view toroidal array was installed, spatially and absolutely calibrated. There are 7 toroidal chords intersect the beam at the major_R_range=[74.2:83.6]cm. Spatial resolution: 1.2 cm. The F-top wide-view poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[0.65:0.9.]m. Spatial resolution: 1.22 cm. Jul 09 2009 05:16PM (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 and operating; not yet calibrated Jul 14 2009 02:22PM (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 Nov 09 2009 09:13AM (irby) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer
FRC-ECE yes All channels working and calibrated. Feb 02 2010 09:56AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips
G-Side Ratiomatic yes Gauge installed. Controller repaired. Aug 23 2009 10:36PM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
Glow Discharge no 6/10/09: Paddles meggered at 1000 v to machine ground (>300 Mohm) prior to closing the vacuum chamber. Plugs for Power Supply and Controls Unplugged and Red Tagged, Safe for In-Vessel Access Jun 10 2009 01:47PM (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. Jul 28 2009 04:23PM (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 poses no safety hazard for people working around the machine Jun 18 2009 01:04PM (marmar) Earl Marmar H/D Ratio marmar
HEAT yes Oct 27 2009 10:39AM (dekow) Gary Dekow - Machine Heaters - burke,dekow
Hirex Jr yes Hirex-Jr has been installed and tested Jun 17 2009 11:54AM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr yes currently only one detector is operational, off-axis He-like argon emission Jul 14 2009 10:01AM (rice) John Rice High Resolution X-Ray ince,rice
HXR no In safe mode (high voltage turned off) May 27 2008 09:19PM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt
ICRF D-Antenna yes operational at 80 MHz Jul 21 2009 04:49PM (wukitch) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes antenna and FFT operational Jul 21 2009 04:49PM (wukitch) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes available at 80 MHz and [0,pi,0,pi] phasing Sep 04 2009 10:01AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin
Laser Blow-Off yes Requires some advance notice for laser start-up Oct 16 2009 12:46PM (g) Martin Greenwald Impurity Injection System g,nthoward
Lower Hybrid no Breaker locked and tagged out. Waveguide disassembly started. Open Waveguides have been shorted. May 28 2008 09:47AM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg
LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha yes Midplane, WB4-LY, LEDGE-LY all collecting data. WB1-LY not attached. Aug 27 2009 09:10AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke
McPherson yes Operating normally Aug 27 2009 09:10AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Operational. Recalibrated 7/27/09. Jul 28 2009 04:22PM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes Gauges are on. B-bottom is not operating - bad sensor head? Jul 14 2009 09:12PM (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 Neutron detectors are calibrated and ready to go. Voltages will be turned on prior to first plasma. Jun 10 2009 10:35AM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes Power back on morning of 11/09 before run Nov 09 2009 09:10AM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby
NINJA no Capillaries were tested in-vessel. Plenum has a leak and needs fixing. Jul 14 2009 09:14PM (labombard) Brian LaBombard NINJA gas puff labombard,terry
PCI yes Operational. Nov 12 2009 02:36PM (ntsujii) Miklos Porkolab Phase Contrast Imaging arai,ennever,ntsujii,porkolab
Penning Gauges yes High voltage is enabled (on during INIT, off during RECOOL). Jun 30 2009 09:42PM (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 Checked and Operational as of 06/18/09 Jun 19 2009 08:04AM (irby) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby
Power - PEI yes Nov 13 2009 06:38AM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby
Power - TMX yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby
Power Systems yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby
Probe Array - ISD yes Array is operational with new cPCI data system. Probe 14 has open circuit. Jul 14 2009 09:17PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH no LH launcher not installed. Cables are unplugged at the A-port rack. Jul 14 2009 09:16PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes Array is operational with new cPCI data system. Jul 14 2009 09:16PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard
Probe Array - UDIV yes Array is operational with new cPCI data system. Probe 13 has a bad cable (open). Jul 14 2009 09:17PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes Since 1100120000 the system is operational except for channel 110 which is not installed Jan 20 2010 09:17AM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP yes System connected to A-port WASP. Needs plasma testing. Jul 14 2009 09:19PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
Sparker yes Sparker back in operation before 11/09 run Nov 09 2009 09:11AM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin
TCI yes System restarted and aligned. Several chords available including NL04. Density Feedback available. Ready for plasma. Jun 18 2009 09:15AM (murray) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes 2 lasers working. 15 spatial channels operational. Calibrated Oct 13 2009 07:49PM (yma) Jerry Hughes Core Thomson scattering jwhughes,yma,zhang
TS - Edge yes Operational, and calibrated. Oct 11 2009 03:01PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma,zhang
Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf
XTOMO yes Operating normally Aug 27 2009 09:10AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke

Feb 9 2010 09:44:01:397AM

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 7 horizontal views spread out R_maj=[0.72-0.9m], 3 cm over the tokamak midplane (beam) Jul 09 2009 05:12PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan
Bolometers yes 2pi (diode+foil), AXA, AXJ, WB3AX, WB4AX, LEDGE-AX working fine. MID-FOILS working fine. The LEDGE/DIV foils still need calibrations applied Aug 27 2009 09:09AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization yes Nov 13 2009 06:37AM (dekow) Jim Irby Boronization dekow,irby
CNPA no Single channel CNPA available as of 12/1707 Jun 10 2009 10:22AM (twf) Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor yes Operational Nov 09 2009 09:12AM (irby) Brian LaBombard Upper Divertor Cryopump irby,labombard
CXRS yes The wide-view toroidal array was installed, spatially and absolutely calibrated. There are 7 toroidal chords intersect the beam at the major_R_range=[74.2:83.6]cm. Spatial resolution: 1.2 cm. The F-top wide-view poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[0.65:0.9.]m. Spatial resolution: 1.22 cm. Jul 09 2009 05:16PM (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 and operating; not yet calibrated Jul 14 2009 02:22PM (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 Nov 09 2009 09:13AM (irby) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer
FRC-ECE yes All channels working and calibrated. Feb 02 2010 09:56AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips
G-Side Ratiomatic yes Gauge installed. Controller repaired. Aug 23 2009 10:36PM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
Glow Discharge no 6/10/09: Paddles meggered at 1000 v to machine ground (>300 Mohm) prior to closing the vacuum chamber. Plugs for Power Supply and Controls Unplugged and Red Tagged, Safe for In-Vessel Access Jun 10 2009 01:47PM (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. Jul 28 2009 04:23PM (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 poses no safety hazard for people working around the machine Jun 18 2009 01:04PM (marmar) Earl Marmar H/D Ratio marmar
HEAT yes Oct 27 2009 10:39AM (dekow) Gary Dekow - Machine Heaters - burke,dekow
Hirex Jr yes Hirex-Jr has been installed and tested Jun 17 2009 11:54AM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr yes currently only one detector is operational, off-axis He-like argon emission Jul 14 2009 10:01AM (rice) John Rice High Resolution X-Ray ince,rice
HXR no In safe mode (high voltage turned off) May 27 2008 09:19PM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt
ICRF D-Antenna yes operational at 80 MHz Jul 21 2009 04:49PM (wukitch) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes antenna and FFT operational Jul 21 2009 04:49PM (wukitch) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes available at 80 MHz and [0,pi,0,pi] phasing Sep 04 2009 10:01AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin
Laser Blow-Off yes Requires some advance notice for laser start-up Oct 16 2009 12:46PM (g) Martin Greenwald Impurity Injection System g,nthoward
Lower Hybrid no Breaker locked and tagged out. Waveguide disassembly started. Open Waveguides have been shorted. May 28 2008 09:47AM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg
LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha yes Midplane, WB4-LY, LEDGE-LY all collecting data. WB1-LY not attached. Aug 27 2009 09:10AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke
McPherson yes Operating normally Aug 27 2009 09:10AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Operational. Recalibrated 7/27/09. Jul 28 2009 04:22PM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes Gauges are on. B-bottom is not operating - bad sensor head? Jul 14 2009 09:12PM (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 Neutron detectors are calibrated and ready to go. Voltages will be turned on prior to first plasma. Jun 10 2009 10:35AM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes Power back on morning of 11/09 before run Nov 09 2009 09:10AM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby
NINJA no Capillaries were tested in-vessel. Plenum has a leak and needs fixing. Jul 14 2009 09:14PM (labombard) Brian LaBombard NINJA gas puff labombard,terry
PCI yes Operational. Nov 12 2009 02:36PM (ntsujii) Miklos Porkolab Phase Contrast Imaging arai,ennever,ntsujii,porkolab
Penning Gauges yes High voltage is enabled (on during INIT, off during RECOOL). Jun 30 2009 09:42PM (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 Checked and Operational as of 06/18/09 Jun 19 2009 08:04AM (irby) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby
Power - PEI yes Nov 13 2009 06:38AM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby
Power - TMX yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby
Power Systems yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby
Probe Array - ISD yes Array is operational with new cPCI data system. Probe 14 has open circuit. Jul 14 2009 09:17PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH no LH launcher not installed. Cables are unplugged at the A-port rack. Jul 14 2009 09:16PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes Array is operational with new cPCI data system. Jul 14 2009 09:16PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard
Probe Array - UDIV yes Array is operational with new cPCI data system. Probe 13 has a bad cable (open). Jul 14 2009 09:17PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes Since 1100120000 the system is operational except for channel 110 which is not installed Jan 20 2010 09:17AM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP yes System connected to A-port WASP. Needs plasma testing. Jul 14 2009 09:19PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
Sparker yes Sparker back in operation before 11/09 run Nov 09 2009 09:11AM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin
TCI yes System restarted and aligned. Several chords available including NL04. Density Feedback available. Ready for plasma. Jun 18 2009 09:15AM (murray) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes 2 lasers working. 15 spatial channels operational. Calibrated Oct 13 2009 07:49PM (yma) Jerry Hughes Core Thomson scattering jwhughes,yma,zhang
TS - Edge yes Operational, and calibrated. Oct 11 2009 03:01PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma,zhang
Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf
XTOMO yes Operating normally Aug 27 2009 09:10AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke

Session Leader Comments
Feb 9 2010 09:08:40:473AM	1100209001	Jerry Hughes	No power shot.
Feb 9 2010 09:42:04:833AM	1100209002	Jerry Hughes	Injection at 0.92s. Disrupts at about 1s. No obvious H-mode. You can see the modulation on the H-alpha. Got through 2 modulation cycles and it disrupts on the 3rd. Magnetics data is lost.
Feb 9 2010 09:53:20:900AM	1100209003	Jerry Hughes	Fizzle. Cell access for 3 grad students (see how they run . . .) PO is a grumpy gus about it.
Feb 9 2010 10:08:25:233AM	1100209004	Jerry Hughes	Turning off modulation for this shot. Progress! 800kA. Long EDA H-mode. Density trace looks pretty good. No RFNET data, but Wukitch says the transmitters look like they gave 1MW, ramping to 3MW. One fault from J. We are missing some additional data: Bolos, GPC, edge TS. Peak Wp is close to 120kJ. 1100202017 had 125--130kJ.
Feb 9 2010 11:05:32:253AM	1100209005	Jerry Hughes	Data came in. RF ramp is looking fairly good. Prad is low. Long EDA H-mode. WE are heating up the outer divertor tiles (4th and 3rd row, no sign of tungsten yet.) No TS data, due to a YAG problem.
Feb 9 2010 11:06:19:147AM	1100209006	Jerry Hughes	More power early. Up to 4MW at 0.8s. Nice pedestal, but a big W injection at 0.87s. Another H-mode at 1s . For next shot, back off power demands.
Feb 9 2010 11:15:50:427AM	1100209007	Jerry Hughes	Better. Long EDA H-mode. Peak Wp of 145kJ. beta_n=1.34. H98=1. Small-ELM-like hash in the high confinement phase. Small injection at 1s blows it away. Great RF trace. Flat at 3MW. E faults starting after 1.1s, but no big deal. Next shot: Time to modulate. Put the modulation back in from 0.9 to 1.4s
Feb 9 2010 11:20:39:500AM	1100209008	Jerry Hughes	Fizzle.
Feb 9 2010 11:35:11:657AM	1100209009	Jerry Hughes	Fizruption. Time to crank out the Fiz Rev Letter.
Feb 9 2010 12:05:52:900PM	1100209010	Jerry Hughes	EDA H-modes with modulation. First H-mode is humming along quite nicely before the modulation begins at 0.9s. Looks okay on the upswing, but on the downswing we start to raise the radiation. Prad grows until there is an injection at about 1s. 2nd H-mode is better. Prad does not continuously increase, although there is still an injection. Speculation is that the strike is simply too low on the divertor. We still see big dTs (>100C) on both the 3rd and 4th row of tiles. Matt has given me the safe word. NExt shot will try to raise strike by mean rise in Z position. PO is raising ZCUR program by 3mm, and decreasing modulation demand to 5mm only.
Feb 9 2010 12:07:46:963PM	1100209011	Jerry Hughes	Fizzzzzz
Feb 9 2010 01:03:52:517PM	1100209012	Jerry Hughes	Long EDA H-mode with higher ZCUR than before, reduced modulation demand. Upswings are ~7mm, and downswings are ~10mm. Prad decreases during H-mode, as observed last week. The decrease continues after the modulation ceases, though. By the end of the shot, confinement has improved considerably. Hash on D-alpha, ICRF comes back. Frequency of QCM is dhifted with the dz modulation on PCI and magnetics.
Feb 9 2010 12:44:13:103PM	1100209013	Jerry Hughes	Fizruption
Feb 9 2010 12:55:08:060PM	1100209014	Jerry Hughes	Fizzle.
Feb 9 2010 01:13:49:770PM	1100209015	Jerry Hughes	We're back. We got the lower density. RF is less happy now, and they need to retune. Multiple H-modes, ELM-free. There is a hint of QCM at 0.97--1.0s. Next shot: retry.
Feb 9 2010 01:37:46:203PM	1100209016	Jerry Hughes	ELM-free H-modes. The 2nd one stays at a high level of confinement for 80ms, before the Prad takes off. Maybe the modulation reduced the rate-of-rise? It's not easy to judge. There are hints of a weak QCM in the latter H-modes Next: Move on the 3a. Higher Ip.
Feb 9 2010 01:49:14:533PM	1100209017	Jerry Hughes	RF tune needs work. 2 H-modes, pretty cold. It's hard to make anything out of the hash on H-alpha, but there does seem to be a tendency for it spike whenever there's a downward stroke on the vertical modulation. Are we pacing Type III ELMs?
Feb 9 2010 02:03:58:900PM	1100209018	Jerry Hughes	Fizzle.
Feb 9 2010 02:23:22:910PM	1100209019	Jerry Hughes	Long steady EDA H-mode, ~2.5MW of RF. Fairly dense. Teped,max~400eV. Seems to be a lot of variation in the reported pedestal parameters from TS, even though the confinement seems to be monotonically decreasing throughout the H-mode. Perhaps aliasing with the modulation? There still tend to be blips at regular intervals in the H-alpha. They seem to be correlated with both the upswings and the downswings this time. There are plenty of blips that are uncorrelated with the programmed jogs as well.
Feb 9 2010 02:24:02:140PM	1100209020	Jerry Hughes	This is a magical shot with no actual plasma, but a lot data traces which are identical to those on shot 19.
Feb 9 2010 02:39:45:773PM	1100209021	Jerry Hughes	Rough shot. Bad ramp-up.Moly brick. No ICRF. Modulation goes unstable.
Feb 9 2010 03:00:39:953PM	1100209022	Jerry Hughes	Radiative, pretty early. RF is clean, but the core radiation leads us to be underpowered. There are blips in D-alpha between 0.9 and 1.1 are correlated with the rises and the falls. There's probably not much I can do about the high core radiation here, so let's proceed to lower the density at this Ip. (I don't want to go to 1.1MA.)
Feb 9 2010 03:19:22:507PM	1100209023	Jerry Hughes	Several ELM-free H-modes. Looks like there are some paced blips. If they are ELMs they don't seem to be relaxing the pedestal at all. Next: Go back to 22 and increase rate of modulation. Period will be 14ms.
Feb 9 2010 03:35:10:140PM	1100209024	Jerry Hughes	1.0MA, target nl04=1e20 Long, nominally EDA H-mode. It looks like we trigger again on the rises and falls. But, now we are at ~70Hz. Amanda reports some interesting crash-like behavior on several edge ECE channels ---maybe a density effect.
Feb 9 2010 03:53:06:287PM	1100209025	Jerry Hughes	Trying a 10ms period on the modulation. Result is pretty cool. Spikes on the D-alpha are very fast now, peaking in activity between 1.1 and 1.4s. Radiation is fairly under control. Next: Be aggressive and try for 200Hz modulation.
Feb 9 2010 03:59:32:053PM	1100209026	Jerry Hughes	Fishizzle.
Feb 9 2010 04:22:28:563PM	1100209027	Jerry Hughes	Fizzle.
Feb 9 2010 04:32:00:490PM	1100209028	Jerry Hughes	A most excellent shot. Very distinct spikes on the D-alpha (and RF) coinciding with the modulation period. Radiation is nearly flat, decreasing toward the end of the shot. The ELMs are not exactly regular.
Feb 9 2010 04:44:50:103PM	1100209029	Jerry Hughes	Turned off modulation. ELMs go away, but the global behavior of the shot is otherwise the same! So the ELMs are triggerable, but they do nothing. Welcome to C-Mod.
Feb 9 2010 04:59:47:890PM	1100209030	Jerry Hughes	Reload the 200Hz modulation and attempt to bring the RF power up. The step up in RF wasn't entirely successful. Yijun will try to improve for next shot. Otherwise pretty similar to 28.
Feb 9 2010 05:05:09:720PM	1100209031	Jerry Hughes	This was the finest fizzle so far today.

Physics Operator Comments
Feb 9 2010 08:53:22:140AM	1100209001	Ron Parker	All systems are functioning and run should start promptly at 9:00
Feb 9 2010 09:08:28:490AM	1100209001	Ron Parker	Shot 1 coming up, keep in mind the machine was boronized, the gas valve control status is unknown, and the cryo is on. It may take several shots to recover a discharge. Action monitor misfunctioned (engineering), no power shot.
Feb 9 2010 09:11:36:883AM	1100209001	Ron Parker	Josh is looking into the action monitor problem.
Feb 9 2010 09:18:11:150AM	1100209001	Ron Parker	Try again
Feb 9 2010 09:26:21:340AM	1100209002	Ron Parker	Shot started up, but disrupted at ~ 1 s. Data system hungup. Josh is looking into it. Meanwhile, Willy confirms that the chopper board is installed in the gas control circuit.
Feb 9 2010 09:39:10:067AM	1100209002	Ron Parker	Diagnostic gate valves are not closing at overpressure trip. Maybe related to a mod put in by Joe -- Andy is trying to find him.
Feb 9 2010 09:43:05:880AM	1100209002	Ron Parker	Action monitor hung up again. Josh is on it. Shot 1 magnetics data are lost.
Feb 9 2010 09:43:58:973AM	1100209002	Ron Parker	Trying again.
Feb 9 2010 09:50:03:650AM	1100209003	Ron Parker	Well after all that, the shot fizzled. Perhaps a little too much gas, but maybe not. We'll shoot it again and see. Meanwhile, the first cell access of the day.
Feb 9 2010 09:57:22:713AM	1100209003	Ron Parker	Just to make things simpler during the tuneup phase, we have removed the Zcur modulation for the next shot.
Feb 9 2010 10:09:46:467AM	1100209004	Ron Parker	So finally a decent shot. Looks like we'll have to add a bit more prefill, breakdown gas pressure ~ 0.05 mTorr. Increase PG pulse from 50 to 55 ms. RF data system problems
Feb 9 2010 10:11:14:220AM	1100209004	Ron Parker	Trying to recover RF data
Feb 9 2010 10:19:41:673AM	1100209004	Ron Parker	Holding for Josh
Feb 9 2010 10:51:17:453AM	1100209005	Ron Parker	Shot 5 ran full length. No Zcur modulation. Next: Bring RF up earlier to 4 MW power
Feb 9 2010 11:02:07:033AM	1100209006	Ron Parker	Shot 6 ran full length, RF still tuning up.
Feb 9 2010 11:13:20:773AM	1100209007	Ron Parker	Shot 7 ran full length. Next: Zcur modulation on, loaded segment 2 from 1100209002
Feb 9 2010 11:27:49:967AM	1100209008	Ron Parker	Shot 8 fizzled. Looks like a poor startup Try again
Feb 9 2010 11:44:32:097AM	1100209009	Ron Parker	Shot 9 disrupted very early, ~ 100 kA. RGA died at 11:03
Feb 9 2010 12:05:50:450PM	1100209010	Ron Parker	Shot 10 ran with modulation. Next Raise Zcur 3 mm, and reduced modulation from 7mm to 5mm
Feb 9 2010 12:10:21:200PM	1100209011	Ron Parker	Shot fizzled/disrupted. Try again, hoping new Zcur position and modulation will put the strike point in a better location.
Feb 9 2010 12:33:38:380PM	1100209012	Ron Parker	Shot 12 ran full length with Zcur modulation.
Feb 9 2010 12:39:45:977PM	1100209013	Ron Parker	Disruption/fizzle. At Steve's suggestion, raise EF4 to -1300 from -1315
Feb 9 2010 01:02:29:313PM	1100209014	Ron Parker	Shot fizzled. Reset EF4 to -1315, add 5 ms more gas -- pulse = 60 ms Josh wants a hold
Feb 9 2010 01:45:34:753PM	1100209015	Ron Parker	Shot 15 disrupted at ~ 1.2 s
Feb 9 2010 01:46:28:830PM	1100209016	Ron Parker	Shot 16 ran full length, in and out of H-modes
Feb 9 2010 01:49:42:800PM	1100209017	Ron Parker	Shot 17 went full length. Current was raised to 1 MA, density to 1e20 m-2 and Zcur modulation was changed. RF was ragged.
Feb 9 2010 01:52:35:880PM	1100209018	Ron Parker	Fizzle
Feb 9 2010 02:19:50:220PM	1100209019	Ron Parker	Shot 19 ran full length. Errors showing up on Init prior to shot 20. No power shot coming up.
Feb 9 2010 02:30:12:050PM	1100209020	Ron Parker	Shot 20 was a no power shot.
Feb 9 2010 02:45:41:510PM	1100209021	Ron Parker	Shot 21 disrupted at ~ 1 s
Feb 9 2010 02:54:47:030PM	1100209022	Ron Parker	Shot 22 ran full length
Feb 9 2010 03:16:57:210PM	1100209023	Ron Parker	Shot 23 ran full length. Density target @ 0.8e20 m-2. Next 70 Hz modulation
Feb 9 2010 03:35:02:263PM	1100209024	Ron Parker	Shot 24 ran full length
Feb 9 2010 03:38:43:890PM	1100209025	Ron Parker	Shot 25 ran full length, a fairly nice shot
Feb 9 2010 04:01:17:210PM	1100209026	Ron Parker	Fizzle
Feb 9 2010 04:48:16:823PM	1100209028	Ron Parker	Shot 28 ran full length
Feb 9 2010 04:45:43:667PM	1100209029	Ron Parker	Shot 29 ran full length -- no Zcur modulation.
Feb 9 2010 04:50:14:073PM	1100209030	Ron Parker	Shot 30 ran full length, with modulation and higher (than shot 28) RF power.
Feb 9 2010 05:05:59:517PM	1100209031	Ron Parker	Fizzle

Engineering Operator Comments
Shot	Time	Type	Status	Comment
2	09:18:39:510AM	Plasma	Ok
3	09:44:25:740AM	Plasma	Ok
4	09:58:16:120AM	Plasma	Ok
5	10:38:23:947AM	Plasma	Ok
6	10:51:30:470AM	Plasma	Ok
7	11:05:27:350AM	Plasma	Ok
8	11:18:27:623AM	Plasma	Ok
9	11:31:24:747AM	Plasma	Ok
10	11:45:18:580AM	Plasma	Ok
11	12:05:03:370PM	Plasma	Ok
12	12:18:21:767PM	Plasma	Ok
13	12:33:36:223PM	Plasma	Ok
14	12:49:53:077PM	Plasma	Ok
15	01:04:53:877PM	Plasma	Ok
16	01:18:41:837PM	Plasma	Ok
17	01:34:38:297PM	Plasma	Ok
18	01:49:30:130PM	Plasma	Ok
19	02:02:52:713PM	Plasma	Ok
20	02:16:56:030PM	Plasma	Bad	No power shot. Critical failure during init
21	02:31:56:393PM	Plasma	Ok
22	02:45:11:480PM	Plasma	Ok
23	02:59:32:593PM	Plasma	Ok
24	03:17:10:600PM	Plasma	Ok
25	03:35:12:310PM	Plasma	Ok
26	03:51:56:317PM	Plasma	Ok
27	04:04:58:697PM	Plasma	Ok
28	04:19:30:203PM	Plasma	Ok
29	04:34:35:693PM	Plasma	Ok
30	04:47:39:433PM	Plasma	Ok
31	05:00:46:453PM	Plasma	Ok