Alcator C-Mod Run 1091008 Information

Miniproposals

Miniproposal: 582

Date Filed: 9/29/2009

Title: An Edge Turbulence and Blob Formation Study with GPI Measurements

First Author: Istvan Cziegler

Session Leader: Istvan Cziegler (shots 1-31)

Operators
Session leader(s):	Istvan Cziegler
Physics operator(s):	Ron Parker,Steve Wolfe,Ron Parker
Engineering operator(s):	Andy Pfeiffer,Bill Parkin,Bill Byford

Engineering Operator Run Comment
MP582 - Edge turbulence and blob formation SL: Cziegler PO: Parker

Session Leader Plans

Entered: Oct 8 2009 12:03:32:447PM

Author: Istvan Cziegler

The purpose of this run is to generate a large enough number of blobs for statistical studies with the new 2D fast GPI of
a) the rapid changes of the poloidal propagation direction of edge turbulence and their correlation to blob ejection
b) the poloidal blob size - radial velocity relationship
c) the spectral properties of the edge turbulence leading up to an L-to-H-mode phase transition and comparing to the developed H-mode turbulence

The key diagnostic is the edge GPI system, therefore there will be
a NINJA puff of D2 for all of the shots to hit 20ms after the APD trigger.
The plenum pressure will be adjusted so as to give a good GPI contrast and introduce a minimal perturbation.

A shot will be considered successful
-if both the edge and the SOL plasma is sampled by the GPI APD's for at least 300ms,
-if the contrast from the background light on the GPI is strong enough to show the spectral features of both layers of turbulence,
-and (for the transition shots) if the radial location at which the turbulence character changes is possible to clearly determine from the spectra.

There are two sections to this run
I. L to H transition shots
II. density and toroidal field scans in Ohmic L-modes

For the whole run, the outer gap is requested to be ~1.5 cm
(to be fine adjusted during the run)

I.L to H transitions

1.Load shot 1080313007
in order to trigger an Ohmic L to EDA H-mode transition. Repeat until good data are obtained (5 shots)

2.Load shot 1091007022
in order to trigger L to EDA H-mode transition with ICRF at 5.4T, 0.8MA, target density will be determined based on the best GPI contrast from section 1. (3-4 shots)

II.Begin density and toroidal field scans, similar to shot 1090918004

1.Scans with constant q95
B=5.4T, Ip=0.8MA
NL04 le 0.3x10^20m-2
NL04 =0.4x10^20m-2
NL04 =0.5x10^20m-2
NL04 =0.6x10^20m-2
Or the highest density for which the GPI contrast is still good. (4 shots)
B=2.9T (ramped), Ip=0.4MA
NL04 le 0.2x10^20m-2
NL04 =0.3x10^20m-2
NL04 =0.4x10^20m-2
NL04 =0.6x10^20m-2
Or the highest density for which the GPI contrast is still good. (4 shots)
B=6.8T, Ip=1.0MA
NL04 le 0.4x10^20m-2
NL04 =0.6x10^20m-2
NL04 =0.8x10^20m-2
NL04 =1.0x10^20m-2
Or the highest density for which the GPI contrast is still good. (4 shots)

2.Scans to separate any Ip and Bt dependence (q is not constant)
B=6.8T, Ip=0.8MA, NL04 =0.4x10^20m-2
B=6.8T, Ip=0.6MA, NL04 =0.3x10^20m-2
B=6.8T, Ip=0.4MA, NL04 =0.2x10^20m-2
(4 shots)

3.If time permits, go back to the constant safety factor scan:
B=4.8T, Ip=0.6MA
NL04 le 0.2x10^20m-2
NL04 =0.4x10^20m-2
NL04 =0.5x10^20m-2
NL04 =0.6x10^20m-2

28 shots total

Physics Operators Plans

Entered: Oct 7 2009 05:15:43:833PM

Author: Ron Parker

Engineering Setup for Run 1091008
-----------------------------------
MP582 - Edge turbulence and blob formation

SL: Cziegler

PO: Parker

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

Power systems as on: 1091007022

**NOTE** Make sure that the Fizzle detect off time (2.1 s) and OH power supply inversion times (2.3 s) are properly set (to ensure that the OH coax joints are "reset" after each plasma pulse.

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)
fill B-side upper with 40 psi D2 Hybrid DISABLED (PG2)
fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3)
fill NINJA 10 psi D2, will enable during run

Enable gate valves and shutters: ECE, VUV, Z-bolo

Torvac gate valve toggle (yes/no): no

Boronization(yes/no): no
Overnight ECDC (yes/no): yes in **HELIUM**
ICRF(yes/no): yes, ready for run on at 8:30 -- may need only 2 MW
LH(yes/no): no
DNB(yes/no): no
Cryopump (yes/no): no

Vessel temperature: 35/35/35

------------------------------
ECDC Parameters (if requested)
------------------------------
gas and pressure: He at 5e-5 Torr
sweep: 44/45/103 cm
scan: 20/120 s

---------
Shot Plan
---------

Start with shot 1091007022 (Sequence 1), 1080313007 (sequence 2)

NOTE: Magnetic predictors need recal

See SL Plan

Session Leader Summaries

Entered: Oct 21 2009 03:42:55:693PM

Author: Istvan Cziegler

In this run we wanted to study the edge and scrape-off-layer turbulence and map
out the parameter space in terms of Bt, Ip, NL04 looking for any variation in the spectral characteristics, propagation velocities and spatial extent of the
turbulence of these two layers, using GPI measurements.
As a secondary goal, we wanted to reproduce the spectral deformation of the edge
layer turbulence, originally observed in 1080313007, and find the best time period
both in Ohmic and ICRF heated transitions in which to run the GPI views and fire
the illuminating gas puff.

The run was a success. Every point of the run plan was performed.

In particular, our shots were:
No. Description NL_04 Comments

-001 test shot 0.2e20 intrinsic light drops at 1.4s, digitized at 200kHz
-002 ohmic H-m 0.4e20 Bt ramped, gap 1.7-1.5cm - no e-feature in turbulence
-003 ohmic H-m 0.4e20 outer gap 1.2cm - e-feature shows up weakly
-004 ohmic H-m 0.4e20 outer gap 0.7cm - back transition after back-ramp, no EDA
-005 ohmic H-m 0.4e20 outer gap 0.7cm - dithering EDA

-006 ohmic L-m 0.4e20 Bt=5.4T, Ip=0.8MA from here
-007 ohmic L-m 0.35e20 lowering density
-008 ohmic L-m 0.31e20 good low density shot, increasing density from here
-009 ohmic L-m 0.52e20
-010 ohmic L-m 0.62e20 #24 connected backwards before (better data from here)
-011 ohmic L-m APD array was off
-012 ohmic L-m 0.71e20

-013 ohmic L-m 0.38e20 Bt=2.6T, Ip=0.4MA from here
-014 ohmic L-m 0.35e20
-015 ohmic L-m 0.50e20
-016 ohmic L-m 0.40e20
-017 ohmic L-m 0.40e20

-018 ohmic L-m 0.50e20 Bt=6.8T, Ip=1.0MA from here (0.8e20 with puff)
-019 ohmic L-m 0.40e20 0.76 with puff
-020 ohmic L-m 0.63e20 0.80 w/ puff
-021 ohmic L-m 0.78e20 0.85 w/ puff
-022 ohmic L-m 0.87e20 0.9 w/ puff

-023 fizzle

-024 ohmic L-m 0.55e20 Bt=6.74T, Ip=0.84MA

-025 fizzle

-026 ohmic L-m 0.4e20 Bt=6.75T, Ip=0.62MA
-027 ohmic L-m 0.3e20 Bt=6.75T, Ip=0.42MA

-028 ohmic L-m 0.3e20 Bt=4.84T, Ip=0.61MA from here
-029 ohmic L-m 0.4e20
-030 ohmic L-m 0.53e20
-031 ohmic L-m 0.59e20

The turbulent fluctuation feature localized to the edge (rho~0.98, ie ~1-1.5cm
inside the separatrix) propagates in the electron diamagnetic direction in all
of these shots. This behaviour is regularly seen in L-mode plasmas. We found a
variation of the propagation speed that is very similar to that found in
1070517 and 1070713, but now we were able to observe an accompanying variation
of the turbulence spectrum. The spectra of this edge feature shows a very
strong dependence on plasma density (Greenwald-fraction), occasionally
exhibiting a broad peak rather than a spectrum following a power law decay.
The trend against density is the opposite of that expected from the spectral
distortions one observes in the pre-transition L-mode edge.
Because of that, next week's transition and I-mode run has even more to promise.

Physics Operator Summaries

Session Leader Comments

Oct 8 2009 09:16:37:477AM 1091008001 Istvan Cziegler Good test shot.
NL04 = 0.2x10^20
Intrinsic light drops at 1.4s,
already tolerable at 0.9s.
Moving NINJA puff to 0.9s, APD trigger to 0.88s
Taking 0.5s of data at 2.MHz

Start plan with 1080313 Ohmic transitions.
We will move the puff about according to our needs for the GPI to see the transition.

Oct 8 2009 09:32:04:383AM 1091008002 Istvan Cziegler Good transition at 1.13s
Good puff.
The outer gap changes between 1.7cm and 1.5 cm.
No electron propagating feature on GPI - will need to decrease outer gap

Oct 8 2009 09:56:18:493AM 1091008003 Istvan Cziegler Good transition at 1.11s
Puff hits at 0.902s
The outer gap is 1.2cm
The edge turbulence barely shows up.
Decrease gap by another 5mm.

Oct 8 2009 10:16:34:243AM 1091008004 Istvan Cziegler Good transition at 1.106s
Puff hits at 0.902s, too little, will add another one at 1.1s
The outer gap is ~0.7cm
The edge turbulence shows up but the ion propagating feature is dominant.
Back transition occurs at 1.3s.
Raise Bt after ramp to access EDA

Oct 8 2009 10:30:21:680AM 1091008005 Istvan Cziegler Good transition at 1.14s
Puff hits at 0.902s, nice and flat!
The outer gap is ~0.7cm
The edge turbulence shows up but the ion propagating feature is dominant.
Back transition occurs at 1.2s.
We might not get any EDA's today.
Moving on to Stage II. Density scans in L-mode. Call back the first shot.

Oct 8 2009 10:48:23:413AM 1091008006 Istvan Cziegler Bt=5.4T
Ip=0.8MA
Ohmic L-mode
Puff hits at 0.902s, second puff at 1.04s.
Signal is flat.
The outer gap is ~0.8cm
NL04 = 0.4 10^20
Try lowering it.
Puff yields an increase of ~0.2 10^20 in density.

Oct 8 2009 10:56:11:260AM 1091008007 Istvan Cziegler Bt=5.4T
Ip=0.8MA
Puff hits at 0.902s, second puff at 1.04s.
Very good signal on the innermost channels
The outer gap is ~0.8cm
NL04 = 0.35 10^20
Try lowering it. (repeat shot)
Puff yields an increase of ~0.15 10^20 in density.

Oct 8 2009 11:16:11:290AM 1091008008 Istvan Cziegler Bt=5.4T
Ip=0.8MA
Puff hits at 0.902s, second puff at 1.04s.
Very good signal on the innermost channels (400mV sitting on top of essentially 0)
The outer gap is ~0.7cm
NL04 = 0.31 10^20
Puff yields an increase of ~0.2 10^20 in density.
The electron feature is regularly DETACHED from k=0/cm,
unlike what's expected (developed electron turbulence).

Oct 8 2009 11:25:39:210AM 1091008009 Istvan Cziegler Bt=5.4T
Ip=0.8MA
Puff hits at 0.902s, second puff at 1.04s.
Very good signal on the innermost channels (400mV sitting on top of essentially 0)
The outer gap shifts from 0.8cm to 0.6cm during puff 1-1.2s
NL04 = 0.52 10^20
Puff yields an increase of ~0.2 10^20 in density.
The electron feature is extending towards the origin.
This might be a density effect.
We need to go to higher densities.

Oct 8 2009 11:40:45:353AM 1091008010 Istvan Cziegler Bt=5.4T
Ip=0.8MA
Puff hits at 0.902s, second puff at 1.04s.
Very good signal on the innermost channels (400mV sitting on top of essentially 0)
The outer gap average is ~0.55cm
There is a fairly large excursion at 1s due to the puff (0.8cm)
NL04 = 0.62 10^20
Puff yields an increase of ~0.2 10^20 in density.
The electron feature is extending towards the origin.

Ferrule #24 was connected backwards until now. Changed it for the rest of the day starting from shot -011.

Oct 8 2009 11:52:38:620AM 1091008011 Istvan Cziegler The APD array was switched off. Repeat shot.

Oct 8 2009 12:15:57:053PM 1091008012 Istvan Cziegler Bt=5.4T
Ip=0.8MA
Puff hits at 0.902s, second puff at 1.04s.
Poor contrast. Intrinsic light suddenly jumped up.
The outer gap average is ~0.6cm
NL04 = 0.71 10^20
Puff yields an increase of ~0.2 10^20 in density.
The electron feature now almost reaches the origin.
The propagation velocities show a big change.
Moving on to Bt=2.7T Ip=0.4MA shots.

Oct 8 2009 12:26:48:537PM 1091008013 Istvan Cziegler Good shot!
Bt=2.6T
Ip=0.4MA
Puff hits at 0.902s, second puff at 1.04s.
Poor contrast. Intrinsic light suddenly jumped up.
The outer gap average is ~1.5cm with large excursions.
Try lowering and regulating it.
NL04 = 0.38 10^20
Second puff yields an increase of ~0.15 10^20 in density.

Oct 8 2009 12:37:59:900PM 1091008014 Istvan Cziegler Shot disrupted at 1.423s
The data before that is good. Decent contrast but not great.
Bt=2.6T
Ip=0.4MA
Puff hits at 0.902s, second puff at 1.04s.
The outer gap average is ~0.7cm with minor excursions.
NL04 = 0.35 10^20
Second puff yields an increase of ~0.1 10^20 in density.
Very good spectra. Electron feature is continuously
connected to the low frequency sections.

Oct 8 2009 12:48:19:540PM 1091008015 Istvan Cziegler Good shot.
Poor contrast.
Bt=2.6T
Ip=0.4MA
Puff hits at 0.902s, second puff at 1.04s.
The outer gap average is ~0.7cm with minor excursions.
NL04 = 0.5 10^20
It is likely that the crossover is what causes the density increase
of ~0.1 10^20 at 1.07s.
Weak spectra.

Oct 8 2009 01:01:30:507PM 1091008016 Istvan Cziegler OK contrast (factor of 2.5)
Bt=2.6T
Ip=0.4MA
Puff hits at 0.902s, second puff at 1.04s.
The outer gap average is ~0.7cm with minor excursions.
NL04 = 0.4x10^20
Puff perturbs very little.
The crossover glitch still occurs at 1.1s causing an increase of 0.1x10^20
Very good spectra, strong electron feature.

Oct 8 2009 01:17:28:993PM 1091008017 Istvan Cziegler OK contrast (factor of 2)
Bt=2.6T
Ip=0.4MA
Puff hits at 0.902s, second puff at 1.04s.
The outer gap average is ~0.7cm with somewhat large excursions.
NL04 = 0.4x10^20
Puff perturbs very little.
The crossover glitch still occurs at 1.1s causing an increase of 0.2x10^20
Good spectra.

Oct 8 2009 01:30:51:977PM 1091008018 Istvan Cziegler Bt=6.8T
Ip=1.0MA
Puff hits at 0.902s, second puff at 1.04s.
Nice and flat.
The outer gap average is ~0.75cm with somewhat large excursions.
NL04 = 0.5x10^20
Puff brings it up to
0.8x10^20
Very good contrast (factor of 5)
Good spectra.
Electron feature is completely detached from the origin, starting at
f=150kHz,k=2/cm
Try a lower density shot.

Oct 8 2009 01:48:10:760PM 1091008019 Istvan Cziegler Bt=6.8T
Ip=1.0MA
Puff hits at 0.902s, second puff at 1.04s.
Nice and flat.
The outer gap average is ~0.7cm with some excursions.
NL04 = 0.4x10^20
Puff brings it up to
0.76x10^20
Very good contrast (factor of 5)
Good spectra.
Electron feature is far detached from the origin, starting at
f=170kHz,k=1.7/cm
Good low density shot.
Start increasing the density.

Oct 8 2009 02:02:22:570PM 1091008020 Istvan Cziegler Bt=6.8T
Ip=1.0MA
Puff hits at 0.902s, second puff at 1.04s.
Nice and flat.
The outer gap average is ~0.73cm with some excursions.
NL04 = 0.63x10^20
Puff brings it up to
0.8x10^20
Good contrast (factor of 3.5)
Good spectra.
Electron feature is far detached from the origin, starting at
f=170kHz,k=2/cm
and doesn't seem to come closer to a fully developed spectrum.
The velocity of the ion feature is spread out with a high average.

Oct 8 2009 02:16:58:883PM 1091008021 Istvan Cziegler Bt=6.8T
Ip=1.0MA
Puff hits at 0.902s, second puff at 1.04s.
Nice and flat.
The outer gap average is ~0.73cm with some excursions.
NL04 = 0.78x10^20
Puff brings it up to
0.85x10^20
Fair contrast (factor of 2.5)
Nice spectra.
Electron feature is still detached from the origin, starting at
f=100kHz,k=1.8/cm
The velocity of the ion feature is narrow with a break at ~15kHz.

Oct 8 2009 02:38:27:557PM 1091008022 Istvan Cziegler Bt=6.73T
Ip=1.0MA
Puff hits at 0.902s, second puff at 1.04s.
Only second puff is taken by the plasma.
The outer gap average is ~0.82cm with excursions.
NL04 = 0.87x10^20
Puff brings it up to
0.9x10^20
Poor contrast (factor of 1.3)
OK spectra.
Electron feature reaching the origin, starting at
Very high speed, ion at very low speed.
Both lobes are straight and narrow.

Oct 8 2009 02:50:58:663PM 1091008023 Istvan Cziegler Fizzle

Oct 8 2009 03:10:36:510PM 1091008024 Istvan Cziegler Bt=6.74T
Ip=0.84MA
Puff hits at 0.902s, second puff at 1.04s.
Nice, flat puff.
The outer gap average is ~0.75cm with minor excursions.
NL04 = 0.55x10^20
Puff brings it up to
0.7x10^20
Good contrast (factor of 4)
Nice spectra.
The electron feature is detached but has a finite lobe to the origin.
Both speeds are large. Ion feature remarkably straight with little spread.
Dropping current further.

Oct 8 2009 03:31:59:493PM 1091008025 Istvan Cziegler Fizzled

Oct 8 2009 03:52:21:400PM 1091008026 Istvan Cziegler Bt=6.75T
Ip=0.62MA
Puff hits at 0.902s, second puff at 1.04s.
The outer gap average is ~0.65cm with excursions.
NL04 = 0.4x10^20
Puff brings it up to
5.5x10^20
Good contrast (factor of 4)
Excellent spectra.
Electron feature nearly reaching the origin (plateau)
Both lobes are straight and narrow and have very high speeds.

Oct 8 2009 04:04:02:853PM 1091008027 Istvan Cziegler Bt=6.75T
Ip=0.42MA
Puff hits at 0.902s, second puff at 1.04s.
The outer gap average is ~0.7cm with somewhat large excursions.
NL04 = 0.27x10^20
Puff brings it up to
4.2x10^20
Good contrast (factor of 4)
Fair spectra.
Electron feature nearly reaching the origin (plateau), but is detached.
Both lobes are straight and narrow and have fairly high speeds.

Oct 8 2009 04:17:02:740PM 1091008028 Istvan Cziegler Bt=4.84T
Ip=0.61MA
Puff hits at 0.902s, second puff at 1.04s.
The outer gap average is ~0.7cm with somewhat large excursions.
NL04 = 0.3x10^20
Puff brings it up to
0.5x10^20
Good contrast (factor of 4.5)
Good spectra.
Electron feature is completely detached, starting at
f=120kHz, k=2/cm
Ion feature is fast.

Oct 8 2009 04:30:22:023PM 1091008029 Istvan Cziegler Bt=4.84T
Ip=0.61MA
Puff hits at 0.902s, second puff at 1.04s.
The outer gap average is ~0.7cm with slight shift.
NL04 = 0.4x10^20
Puff brings it up to
0.58x10^20
OK contrast (factor of 2.5)
Good spectra.
Electron feature is plateauing.
Both speeds are very high.

Oct 8 2009 04:44:20:757PM 1091008030 Istvan Cziegler Bt=4.84T
Ip=0.61MA
Puff hits at 0.902s, second puff at 1.04s.
The outer gap average is ~0.75cm with slight shift.
NL04 = 0.53x10^20
Puff brings it up to
0.63x10^20
OK contrast (factor of 2.3)
Good spectra.
Electron feature is connected, developed, slightly plateauing.
Both speeds are high.

Oct 8 2009 04:59:20:240PM 1091008031 Istvan Cziegler Bt=4.84T
Ip=0.61MA
Puff hits at 0.902s, second puff at 1.04s.
The outer gap average is ~0.78cm with slight shift.
NL04 = 0.59x10^20
Puff brings it up to
0.62x10^20
OK contrast (factor of 2.3)
Good spectra.
Electron feature is connected (slight dip).
Speeds are high and the lobes are very straight.
Good indication of the developing turbulence as the density rises.
Good last shot for today.

Physics Operator Comments

Oct 8 2009 09:05:16:587AM 1091008001 Ron Parker We are starting with shot 1090918004 in Seg 2. 1091007022 in Seg 1

Magnetic predictors have been recalculated

Oct 8 2009 09:20:42:587AM 1091008001 Ron Parker Shot 1 ran full length, very low density.

Oct 8 2009 09:27:00:977AM 1091008002 Ron Parker Shot 2 ran OK, disrupting on current rampdown.

Oct 8 2009 09:37:21:930AM 1091008002 Ron Parker Next shot: reduce outer gap to 1 cm

Oct 8 2009 10:09:36:180AM 1091008003 Ron Parker Shot 3 ran full length in flattop, but disrupted at beginning of FT.

Oct 8 2009 10:10:01:040AM 1091008004 Ron Parker Shot 4 ran full length

Oct 8 2009 10:36:48:727AM 1091008005 Ron Parker Shot 5 ran full length

Oct 8 2009 10:38:20:947AM 1091008006 Ron Parker Shot 6 ran full length.

Although it was programmed ot run at nl_04 at 2e19, it ran closer to 4e19.

Run again to try to pump out the walls.

Oct 8 2009 10:58:46:510AM 1091008007 Ron Parker Shot 7 ran full length.

Oct 8 2009 11:14:11:930AM 1091008008 Ron Parker Shot 8 ran full length, nl_04 just above 3e19.

Oct 8 2009 11:28:16:413AM 1091008009 Ron Parker Shot 9 ran full length

Oct 8 2009 11:35:26:837AM 1091008010 Ron Parker Shot 10 ran just fine. Better right gap, but still a slight jog in it.

Cell access

Oct 8 2009 11:56:53:460AM 1091008011 Ron Parker Shot 11 ran full length, stable right gap.

Oct 8 2009 12:00:01:947PM 1091008012 Ron Parker Another full length shot

Oct 8 2009 04:32:08:883PM 1091008013 Ron Parker Shot 13 ran with ~ 400kA, right gap too big by a cm.

Oct 8 2009 12:32:42:837PM 1091008014 Ron Parker Shot 14 ran, but disrupted just before 1.5 s.

Oct 8 2009 12:49:01:570PM 1091008015 Ron Parker Shot 15 ran full length, crossover routine implemented on next shot.

Oct 8 2009 01:00:39:790PM 1091008016 Ron Parker Shot 16 ran full length

Oct 8 2009 01:08:42:443PM 1091008017 Ron Parker For this shot, RXL was moved out 0.5cm

Shot 17 ran full length.

Oct 8 2009 01:29:23:180PM 1091008018 Steve Wolfe
Shot#18: Wolfe taking over as physop Moving on to 6.8T, 1.0MA, 4e19 TF to 189kA, IP to 1.0, extend nl04 program to 1.5sec at 4e19, oh1 crossover routine OFF. plasma full length, 1MA, 6.75T nl04=5.0e19 before the ninja, gas is completely off after 0.13sec. I can try reducing the pg3 in seg1 but may not get much lower.

Oct 8 2009 02:15:06:850PM 1091008018 Ron Parker Steve Wolfe is PO while Parker is in class.

Oct 8 2009 01:44:52:913PM 1091008019 Steve Wolfe
Shot#19: eliminate seg1 pg3 puff extend D gain in seg2 to 1.5sec at 3 (doesn't matter) reduce nl04 point at .104 to 2e19, try to get lower density at this current plasma full length, nl04 close to 4e19. RF fires in rampdown 0.5MW Next: 6e19

Oct 8 2009 01:58:34:760PM 1091008020 Steve Wolfe
Shot#20: 6e19 on nl04, leave pg3 off. Nathan will fire at 1.4sec Still at 1MA, 6.8T plasma full length, nl04=6e19 Next: 8e19

Oct 8 2009 02:09:23:103PM 1091008021 Steve Wolfe
Shot#21: 8e19 on nl04, just in case, recall the nl04 pred to check the calibration (last one ended high by 5%); leave D=3,P=9->8 Still at 1MA, 6.8T Note, I didn't load the pg3 change in seg1 on#19, so it's still present. plasma full length. Parker is back and taking over as physop again

Oct 8 2009 02:15:46:307PM 1091008021 Ron Parker Parker back and is PO for shot 22 on

Oct 8 2009 02:42:40:990PM 1091008022 Ron Parker Shot 22 ran full length.

Oct 8 2009 02:52:44:570PM 1091008023 Ron Parker Shot 23 fizzled! Why?

Try it again.

Oct 8 2009 03:09:54:443PM 1091008024 Ron Parker Snot 24 ran full length as programmed.

Next: Reduce current to 600 kA, reduce density to 4e19 m-2.

Oct 8 2009 03:33:56:227PM 1091008025 Ron Parker Fizzle again. Still not clear why.

Oct 8 2009 03:58:29:680PM 1091008026 Ron Parker Shot 26 ran full length.

Next: 400 kA, nl_04 =3e19 m-3

Oct 8 2009 03:59:43:150PM 1091008027 Ron Parker Shot 27 ran well, 400 kA, nl_04 = 3e19

Oct 8 2009 04:19:00:210PM 1091008028 Ron Parker Shot 28 ran without a hitch, 4.8 T, nl_04 = 3e19, 600 kA.

Next, same shot with nl_04 = 4e19.

Oct 8 2009 04:28:32:257PM 1091008029 Ron Parker Shot 29 ran well, full length.

Next: Same shot, nl_04 =5e19

Oct 8 2009 04:41:36:523PM 1091008030 Ron Parker Shot 30 ran well, full length.

Oct 8 2009 04:56:04:227PM 1091008031 Ron Parker This run put the machine through its paces, with shots at fields ranging from 2.7 T to 6.8T, currents from 400 kA to 1 MA and densities, nl_04 from 2+e19 m-2 to 8e19. The machine ran flawlessly over this wide range of parameters. There were no engineering issues, no data system problems and even the PO managed not to screw up. Apparently excellent data were produced, as will be reported on in hte SL's summary.

Scorecard: 31 plasma attempts and 29 shots producing useful data.

26 were full length including rampdown,
3 disruptions in rampdown,
2 (unexplained) fizzles.

Engineering Operator Comments

Shot Time Type Status Comment

1 09:05:01:337AM Plasma Ok

2 09:20:55:197AM Plasma Ok

3 09:38:17:053AM Plasma Ok

4 09:56:18:430AM Plasma Ok

5 10:15:01:087AM Plasma Ok

6 10:32:55:150AM Plasma Ok

7 10:45:52:353AM Plasma Ok

8 10:59:06:743AM Plasma Ok

9 11:14:16:850AM Plasma Ok

10 11:27:04:587AM Plasma Ok

11 11:41:22:290AM Plasma Ok

12 11:56:31:493AM Plasma Ok

13 12:15:10:067PM Plasma Ok

14 12:27:56:803PM Plasma Ok

15 12:40:46:790PM Plasma Ok

16 12:53:38:850PM Plasma Ok

17 01:06:30:367PM Plasma Ok

18 01:23:59:693PM Plasma Ok

19 01:39:43:867PM Plasma Ok

20 01:54:11:150PM Plasma Ok

21 02:07:26:163PM Plasma Ok

22 02:30:11:133PM Plasma Ok

23 02:48:45:460PM Plasma Ok

24 03:01:34:587PM Plasma Ok

25 03:28:30:740PM Plasma Ok

26 03:42:21:007PM Plasma Ok

27 03:55:10:053PM Plasma Ok

28 04:10:17:307PM Plasma Ok

29 04:24:21:650PM Plasma Ok

30 04:38:08:430PM Plasma Ok

31 04:52:28:117PM Plasma Ok

System Availability

Oct 8 2009 09:04:31:930AM

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 no Bottle Removed from the Cell, Piezo box on Igloo Removed. System in safe mode for In-Vessel Access May 30 2008 02:25PM (dekow) Jim Irby Boronization dekow,irby
CNPA no Single channel CNPA available as of 12/1707 Jun 10 2009 10:22AM (twf) Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor no Cyopump hardware is not yet reinstalled in the cell. Jul 14 2009 09:21PM (labombard) 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 no safely disabled; ready to be dismantled May 28 2008 10:22AM (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 power locked & tagged out; gate valve disabled May 28 2008 10:03AM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,gung
ECDC no 6/10/09 Magnetron relocated to west wall in cell at H-port. All controls and hardware have been installed but need to be tested prior to full operation. Magnetron Unplugged and Red tagged, PEI breaker red tagged, Safe for In-Vessel Activity Jun 10 2009 02:35PM (dekow) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer
FRC-ECE yes All 32 channels working and calibrated. Oct 06 2009 11:17AM (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 no Disconnect switch is open, reg tagged and locked. Shunt Trip Breaker is opened. Safe for in-vessel work. Jun 04 2008 12:24PM (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
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 Operational --- Uncalibrated and needs to be positioned at port Jun 25 2009 05:08PM (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 no Down. Will not be fixed until vent. Sep 24 2009 09:10AM (ntsujii) Miklos Porkolab Phase Contrast Imaging arai,edlund,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 Operational ---- ECDC running as required Jun 19 2009 08:06AM (irby) 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 1090824xxx, all channels are operational. Aug 25 2009 09:31AM (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 now at K-Hor. Set for 100 uA of current. Will up to 200 uA before first plasma Jun 18 2009 01:01PM (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. Initial (NOT final) Te calibration applied. ***No ne calibration yet*** Aug 05 2009 08:44AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma,zhang
TS - Edge yes Operational, Te calibration is thought to be good. Density is ***uncalibrated*** Aug 11 2009 02:31PM (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
Oct 8 2009 09:16:37:477AM	1091008001	Istvan Cziegler	Good test shot. NL04 = 0.2x10^20 Intrinsic light drops at 1.4s, already tolerable at 0.9s. Moving NINJA puff to 0.9s, APD trigger to 0.88s Taking 0.5s of data at 2.MHz Start plan with 1080313 Ohmic transitions. We will move the puff about according to our needs for the GPI to see the transition.
Oct 8 2009 09:32:04:383AM	1091008002	Istvan Cziegler	Good transition at 1.13s Good puff. The outer gap changes between 1.7cm and 1.5 cm. No electron propagating feature on GPI - will need to decrease outer gap
Oct 8 2009 09:56:18:493AM	1091008003	Istvan Cziegler	Good transition at 1.11s Puff hits at 0.902s The outer gap is 1.2cm The edge turbulence barely shows up. Decrease gap by another 5mm.
Oct 8 2009 10:16:34:243AM	1091008004	Istvan Cziegler	Good transition at 1.106s Puff hits at 0.902s, too little, will add another one at 1.1s The outer gap is ~0.7cm The edge turbulence shows up but the ion propagating feature is dominant. Back transition occurs at 1.3s. Raise Bt after ramp to access EDA
Oct 8 2009 10:30:21:680AM	1091008005	Istvan Cziegler	Good transition at 1.14s Puff hits at 0.902s, nice and flat! The outer gap is ~0.7cm The edge turbulence shows up but the ion propagating feature is dominant. Back transition occurs at 1.2s. We might not get any EDA's today. Moving on to Stage II. Density scans in L-mode. Call back the first shot.
Oct 8 2009 10:48:23:413AM	1091008006	Istvan Cziegler	Bt=5.4T Ip=0.8MA Ohmic L-mode Puff hits at 0.902s, second puff at 1.04s. Signal is flat. The outer gap is ~0.8cm NL04 = 0.4 10^20 Try lowering it. Puff yields an increase of ~0.2 10^20 in density.
Oct 8 2009 10:56:11:260AM	1091008007	Istvan Cziegler	Bt=5.4T Ip=0.8MA Puff hits at 0.902s, second puff at 1.04s. Very good signal on the innermost channels The outer gap is ~0.8cm NL04 = 0.35 10^20 Try lowering it. (repeat shot) Puff yields an increase of ~0.15 10^20 in density.
Oct 8 2009 11:16:11:290AM	1091008008	Istvan Cziegler	Bt=5.4T Ip=0.8MA Puff hits at 0.902s, second puff at 1.04s. Very good signal on the innermost channels (400mV sitting on top of essentially 0) The outer gap is ~0.7cm NL04 = 0.31 10^20 Puff yields an increase of ~0.2 10^20 in density. The electron feature is regularly DETACHED from k=0/cm, unlike what's expected (developed electron turbulence).
Oct 8 2009 11:25:39:210AM	1091008009	Istvan Cziegler	Bt=5.4T Ip=0.8MA Puff hits at 0.902s, second puff at 1.04s. Very good signal on the innermost channels (400mV sitting on top of essentially 0) The outer gap shifts from 0.8cm to 0.6cm during puff 1-1.2s NL04 = 0.52 10^20 Puff yields an increase of ~0.2 10^20 in density. The electron feature is extending towards the origin. This might be a density effect. We need to go to higher densities.
Oct 8 2009 11:40:45:353AM	1091008010	Istvan Cziegler	Bt=5.4T Ip=0.8MA Puff hits at 0.902s, second puff at 1.04s. Very good signal on the innermost channels (400mV sitting on top of essentially 0) The outer gap average is ~0.55cm There is a fairly large excursion at 1s due to the puff (0.8cm) NL04 = 0.62 10^20 Puff yields an increase of ~0.2 10^20 in density. The electron feature is extending towards the origin. Ferrule #24 was connected backwards until now. Changed it for the rest of the day starting from shot -011.
Oct 8 2009 11:52:38:620AM	1091008011	Istvan Cziegler	The APD array was switched off. Repeat shot.
Oct 8 2009 12:15:57:053PM	1091008012	Istvan Cziegler	Bt=5.4T Ip=0.8MA Puff hits at 0.902s, second puff at 1.04s. Poor contrast. Intrinsic light suddenly jumped up. The outer gap average is ~0.6cm NL04 = 0.71 10^20 Puff yields an increase of ~0.2 10^20 in density. The electron feature now almost reaches the origin. The propagation velocities show a big change. Moving on to Bt=2.7T Ip=0.4MA shots.
Oct 8 2009 12:26:48:537PM	1091008013	Istvan Cziegler	Good shot! Bt=2.6T Ip=0.4MA Puff hits at 0.902s, second puff at 1.04s. Poor contrast. Intrinsic light suddenly jumped up. The outer gap average is ~1.5cm with large excursions. Try lowering and regulating it. NL04 = 0.38 10^20 Second puff yields an increase of ~0.15 10^20 in density.
Oct 8 2009 12:37:59:900PM	1091008014	Istvan Cziegler	Shot disrupted at 1.423s The data before that is good. Decent contrast but not great. Bt=2.6T Ip=0.4MA Puff hits at 0.902s, second puff at 1.04s. The outer gap average is ~0.7cm with minor excursions. NL04 = 0.35 10^20 Second puff yields an increase of ~0.1 10^20 in density. Very good spectra. Electron feature is continuously connected to the low frequency sections.
Oct 8 2009 12:48:19:540PM	1091008015	Istvan Cziegler	Good shot. Poor contrast. Bt=2.6T Ip=0.4MA Puff hits at 0.902s, second puff at 1.04s. The outer gap average is ~0.7cm with minor excursions. NL04 = 0.5 10^20 It is likely that the crossover is what causes the density increase of ~0.1 10^20 at 1.07s. Weak spectra.
Oct 8 2009 01:01:30:507PM	1091008016	Istvan Cziegler	OK contrast (factor of 2.5) Bt=2.6T Ip=0.4MA Puff hits at 0.902s, second puff at 1.04s. The outer gap average is ~0.7cm with minor excursions. NL04 = 0.4x10^20 Puff perturbs very little. The crossover glitch still occurs at 1.1s causing an increase of 0.1x10^20 Very good spectra, strong electron feature.
Oct 8 2009 01:17:28:993PM	1091008017	Istvan Cziegler	OK contrast (factor of 2) Bt=2.6T Ip=0.4MA Puff hits at 0.902s, second puff at 1.04s. The outer gap average is ~0.7cm with somewhat large excursions. NL04 = 0.4x10^20 Puff perturbs very little. The crossover glitch still occurs at 1.1s causing an increase of 0.2x10^20 Good spectra.
Oct 8 2009 01:30:51:977PM	1091008018	Istvan Cziegler	Bt=6.8T Ip=1.0MA Puff hits at 0.902s, second puff at 1.04s. Nice and flat. The outer gap average is ~0.75cm with somewhat large excursions. NL04 = 0.5x10^20 Puff brings it up to 0.8x10^20 Very good contrast (factor of 5) Good spectra. Electron feature is completely detached from the origin, starting at f=150kHz,k=2/cm Try a lower density shot.
Oct 8 2009 01:48:10:760PM	1091008019	Istvan Cziegler	Bt=6.8T Ip=1.0MA Puff hits at 0.902s, second puff at 1.04s. Nice and flat. The outer gap average is ~0.7cm with some excursions. NL04 = 0.4x10^20 Puff brings it up to 0.76x10^20 Very good contrast (factor of 5) Good spectra. Electron feature is far detached from the origin, starting at f=170kHz,k=1.7/cm Good low density shot. Start increasing the density.
Oct 8 2009 02:02:22:570PM	1091008020	Istvan Cziegler	Bt=6.8T Ip=1.0MA Puff hits at 0.902s, second puff at 1.04s. Nice and flat. The outer gap average is ~0.73cm with some excursions. NL04 = 0.63x10^20 Puff brings it up to 0.8x10^20 Good contrast (factor of 3.5) Good spectra. Electron feature is far detached from the origin, starting at f=170kHz,k=2/cm and doesn't seem to come closer to a fully developed spectrum. The velocity of the ion feature is spread out with a high average.
Oct 8 2009 02:16:58:883PM	1091008021	Istvan Cziegler	Bt=6.8T Ip=1.0MA Puff hits at 0.902s, second puff at 1.04s. Nice and flat. The outer gap average is ~0.73cm with some excursions. NL04 = 0.78x10^20 Puff brings it up to 0.85x10^20 Fair contrast (factor of 2.5) Nice spectra. Electron feature is still detached from the origin, starting at f=100kHz,k=1.8/cm The velocity of the ion feature is narrow with a break at ~15kHz.
Oct 8 2009 02:38:27:557PM	1091008022	Istvan Cziegler	Bt=6.73T Ip=1.0MA Puff hits at 0.902s, second puff at 1.04s. Only second puff is taken by the plasma. The outer gap average is ~0.82cm with excursions. NL04 = 0.87x10^20 Puff brings it up to 0.9x10^20 Poor contrast (factor of 1.3) OK spectra. Electron feature reaching the origin, starting at Very high speed, ion at very low speed. Both lobes are straight and narrow.
Oct 8 2009 02:50:58:663PM	1091008023	Istvan Cziegler	Fizzle
Oct 8 2009 03:10:36:510PM	1091008024	Istvan Cziegler	Bt=6.74T Ip=0.84MA Puff hits at 0.902s, second puff at 1.04s. Nice, flat puff. The outer gap average is ~0.75cm with minor excursions. NL04 = 0.55x10^20 Puff brings it up to 0.7x10^20 Good contrast (factor of 4) Nice spectra. The electron feature is detached but has a finite lobe to the origin. Both speeds are large. Ion feature remarkably straight with little spread. Dropping current further.
Oct 8 2009 03:31:59:493PM	1091008025	Istvan Cziegler	Fizzled
Oct 8 2009 03:52:21:400PM	1091008026	Istvan Cziegler	Bt=6.75T Ip=0.62MA Puff hits at 0.902s, second puff at 1.04s. The outer gap average is ~0.65cm with excursions. NL04 = 0.4x10^20 Puff brings it up to 5.5x10^20 Good contrast (factor of 4) Excellent spectra. Electron feature nearly reaching the origin (plateau) Both lobes are straight and narrow and have very high speeds.
Oct 8 2009 04:04:02:853PM	1091008027	Istvan Cziegler	Bt=6.75T Ip=0.42MA Puff hits at 0.902s, second puff at 1.04s. The outer gap average is ~0.7cm with somewhat large excursions. NL04 = 0.27x10^20 Puff brings it up to 4.2x10^20 Good contrast (factor of 4) Fair spectra. Electron feature nearly reaching the origin (plateau), but is detached. Both lobes are straight and narrow and have fairly high speeds.
Oct 8 2009 04:17:02:740PM	1091008028	Istvan Cziegler	Bt=4.84T Ip=0.61MA Puff hits at 0.902s, second puff at 1.04s. The outer gap average is ~0.7cm with somewhat large excursions. NL04 = 0.3x10^20 Puff brings it up to 0.5x10^20 Good contrast (factor of 4.5) Good spectra. Electron feature is completely detached, starting at f=120kHz, k=2/cm Ion feature is fast.
Oct 8 2009 04:30:22:023PM	1091008029	Istvan Cziegler	Bt=4.84T Ip=0.61MA Puff hits at 0.902s, second puff at 1.04s. The outer gap average is ~0.7cm with slight shift. NL04 = 0.4x10^20 Puff brings it up to 0.58x10^20 OK contrast (factor of 2.5) Good spectra. Electron feature is plateauing. Both speeds are very high.
Oct 8 2009 04:44:20:757PM	1091008030	Istvan Cziegler	Bt=4.84T Ip=0.61MA Puff hits at 0.902s, second puff at 1.04s. The outer gap average is ~0.75cm with slight shift. NL04 = 0.53x10^20 Puff brings it up to 0.63x10^20 OK contrast (factor of 2.3) Good spectra. Electron feature is connected, developed, slightly plateauing. Both speeds are high.
Oct 8 2009 04:59:20:240PM	1091008031	Istvan Cziegler	Bt=4.84T Ip=0.61MA Puff hits at 0.902s, second puff at 1.04s. The outer gap average is ~0.78cm with slight shift. NL04 = 0.59x10^20 Puff brings it up to 0.62x10^20 OK contrast (factor of 2.3) Good spectra. Electron feature is connected (slight dip). Speeds are high and the lobes are very straight. Good indication of the developing turbulence as the density rises. Good last shot for today.

Physics Operator Comments
Oct 8 2009 09:05:16:587AM	1091008001	Ron Parker	We are starting with shot 1090918004 in Seg 2. 1091007022 in Seg 1 Magnetic predictors have been recalculated
Oct 8 2009 09:20:42:587AM	1091008001	Ron Parker	Shot 1 ran full length, very low density.
Oct 8 2009 09:27:00:977AM	1091008002	Ron Parker	Shot 2 ran OK, disrupting on current rampdown.
Oct 8 2009 09:37:21:930AM	1091008002	Ron Parker	Next shot: reduce outer gap to 1 cm
Oct 8 2009 10:09:36:180AM	1091008003	Ron Parker	Shot 3 ran full length in flattop, but disrupted at beginning of FT.
Oct 8 2009 10:10:01:040AM	1091008004	Ron Parker	Shot 4 ran full length
Oct 8 2009 10:36:48:727AM	1091008005	Ron Parker	Shot 5 ran full length
Oct 8 2009 10:38:20:947AM	1091008006	Ron Parker	Shot 6 ran full length. Although it was programmed ot run at nl_04 at 2e19, it ran closer to 4e19. Run again to try to pump out the walls.
Oct 8 2009 10:58:46:510AM	1091008007	Ron Parker	Shot 7 ran full length.
Oct 8 2009 11:14:11:930AM	1091008008	Ron Parker	Shot 8 ran full length, nl_04 just above 3e19.
Oct 8 2009 11:28:16:413AM	1091008009	Ron Parker	Shot 9 ran full length
Oct 8 2009 11:35:26:837AM	1091008010	Ron Parker	Shot 10 ran just fine. Better right gap, but still a slight jog in it. Cell access
Oct 8 2009 11:56:53:460AM	1091008011	Ron Parker	Shot 11 ran full length, stable right gap.
Oct 8 2009 12:00:01:947PM	1091008012	Ron Parker	Another full length shot
Oct 8 2009 04:32:08:883PM	1091008013	Ron Parker	Shot 13 ran with ~ 400kA, right gap too big by a cm.
Oct 8 2009 12:32:42:837PM	1091008014	Ron Parker	Shot 14 ran, but disrupted just before 1.5 s.
Oct 8 2009 12:49:01:570PM	1091008015	Ron Parker	Shot 15 ran full length, crossover routine implemented on next shot.
Oct 8 2009 01:00:39:790PM	1091008016	Ron Parker	Shot 16 ran full length
Oct 8 2009 01:08:42:443PM	1091008017	Ron Parker	For this shot, RXL was moved out 0.5cm Shot 17 ran full length.
Oct 8 2009 01:29:23:180PM	1091008018	Steve Wolfe	Shot#18: Wolfe taking over as physop Moving on to 6.8T, 1.0MA, 4e19 TF to 189kA, IP to 1.0, extend nl04 program to 1.5sec at 4e19, oh1 crossover routine OFF. plasma full length, 1MA, 6.75T nl04=5.0e19 before the ninja, gas is completely off after 0.13sec. I can try reducing the pg3 in seg1 but may not get much lower.
Oct 8 2009 02:15:06:850PM	1091008018	Ron Parker	Steve Wolfe is PO while Parker is in class.
Oct 8 2009 01:44:52:913PM	1091008019	Steve Wolfe	Shot#19: eliminate seg1 pg3 puff extend D gain in seg2 to 1.5sec at 3 (doesn't matter) reduce nl04 point at .104 to 2e19, try to get lower density at this current plasma full length, nl04 close to 4e19. RF fires in rampdown 0.5MW Next: 6e19
Oct 8 2009 01:58:34:760PM	1091008020	Steve Wolfe	Shot#20: 6e19 on nl04, leave pg3 off. Nathan will fire at 1.4sec Still at 1MA, 6.8T plasma full length, nl04=6e19 Next: 8e19
Oct 8 2009 02:09:23:103PM	1091008021	Steve Wolfe	Shot#21: 8e19 on nl04, just in case, recall the nl04 pred to check the calibration (last one ended high by 5%); leave D=3,P=9->8 Still at 1MA, 6.8T Note, I didn't load the pg3 change in seg1 on#19, so it's still present. plasma full length. Parker is back and taking over as physop again
Oct 8 2009 02:15:46:307PM	1091008021	Ron Parker	Parker back and is PO for shot 22 on
Oct 8 2009 02:42:40:990PM	1091008022	Ron Parker	Shot 22 ran full length.
Oct 8 2009 02:52:44:570PM	1091008023	Ron Parker	Shot 23 fizzled! Why? Try it again.
Oct 8 2009 03:09:54:443PM	1091008024	Ron Parker	Snot 24 ran full length as programmed. Next: Reduce current to 600 kA, reduce density to 4e19 m-2.
Oct 8 2009 03:33:56:227PM	1091008025	Ron Parker	Fizzle again. Still not clear why.
Oct 8 2009 03:58:29:680PM	1091008026	Ron Parker	Shot 26 ran full length. Next: 400 kA, nl_04 =3e19 m-3
Oct 8 2009 03:59:43:150PM	1091008027	Ron Parker	Shot 27 ran well, 400 kA, nl_04 = 3e19
Oct 8 2009 04:19:00:210PM	1091008028	Ron Parker	Shot 28 ran without a hitch, 4.8 T, nl_04 = 3e19, 600 kA. Next, same shot with nl_04 = 4e19.
Oct 8 2009 04:28:32:257PM	1091008029	Ron Parker	Shot 29 ran well, full length. Next: Same shot, nl_04 =5e19
Oct 8 2009 04:41:36:523PM	1091008030	Ron Parker	Shot 30 ran well, full length.
Oct 8 2009 04:56:04:227PM	1091008031	Ron Parker	This run put the machine through its paces, with shots at fields ranging from 2.7 T to 6.8T, currents from 400 kA to 1 MA and densities, nl_04 from 2+e19 m-2 to 8e19. The machine ran flawlessly over this wide range of parameters. There were no engineering issues, no data system problems and even the PO managed not to screw up. Apparently excellent data were produced, as will be reported on in hte SL's summary. Scorecard: 31 plasma attempts and 29 shots producing useful data. 26 were full length including rampdown, 3 disruptions in rampdown, 2 (unexplained) fizzles.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:05:01:337AM	Plasma	Ok
2	09:20:55:197AM	Plasma	Ok
3	09:38:17:053AM	Plasma	Ok
4	09:56:18:430AM	Plasma	Ok
5	10:15:01:087AM	Plasma	Ok
6	10:32:55:150AM	Plasma	Ok
7	10:45:52:353AM	Plasma	Ok
8	10:59:06:743AM	Plasma	Ok
9	11:14:16:850AM	Plasma	Ok
10	11:27:04:587AM	Plasma	Ok
11	11:41:22:290AM	Plasma	Ok
12	11:56:31:493AM	Plasma	Ok
13	12:15:10:067PM	Plasma	Ok
14	12:27:56:803PM	Plasma	Ok
15	12:40:46:790PM	Plasma	Ok
16	12:53:38:850PM	Plasma	Ok
17	01:06:30:367PM	Plasma	Ok
18	01:23:59:693PM	Plasma	Ok
19	01:39:43:867PM	Plasma	Ok
20	01:54:11:150PM	Plasma	Ok
21	02:07:26:163PM	Plasma	Ok
22	02:30:11:133PM	Plasma	Ok
23	02:48:45:460PM	Plasma	Ok
24	03:01:34:587PM	Plasma	Ok
25	03:28:30:740PM	Plasma	Ok
26	03:42:21:007PM	Plasma	Ok
27	03:55:10:053PM	Plasma	Ok
28	04:10:17:307PM	Plasma	Ok
29	04:24:21:650PM	Plasma	Ok
30	04:38:08:430PM	Plasma	Ok
31	04:52:28:117PM	Plasma	Ok