Alcator C-Mod Run 1070824 Information

Miniproposals

Miniproposal: 495a

Date Filed: 6/22/2007

Title: Alfvén Cascades studies with ICRH and LHCD

First Author: Eric Edlund

Session Leader: Eric Edlund (shots 33-35)

Miniproposal: 499a

Date Filed: 7/30/2007

Title: Parametric Decay and Density Limit for LHEH/LHCD

First Author: Yuichi Takase

Session Leader: Yuichi Takase (shots 1-32)

Operators
Session leader(s):	Yuichi Takase,Eric Edlund
Physics operator(s):	Joseph Snipes
Engineering operator(s):	Sam Pierson,Andy Pfeiffer,Gary Dekow

Engineering Operator Run Comment
MP499A Parameteric Decay and density Limit for LHEH/LHCD E/O Pierson P/O

Session Leader Plans

Entered: Aug 23 2007 11:36:58:690AM

Author: Yuichi Takase

MP499A Parametric Decay and Density Limit for LHEH/LHCD
SL: Yuichi Takase
PO: Joe Snipes

D, 5.4T (no 8T shots), 1MA
start with low density LSN shot
1070807005 with Ip changed from 0.9MA to 1MA

LH 90deg ideal phasing
start 0.95s stop 1.3s
7 segments (50ms/seg)
1: 50-75kW
2-3: 75
4-5: 30
6-7: 75

ICRF (J port) 2MW
1.15-1.3s

A-side reciprocating Langmuir probe
2 plunges up to the LCFS, with peak insertion times
at 1.05s and 1.25s

L-mode/H-mode comparison with sequentially increasing density
approximate range
nel_04 = (0.5 - 1.5) x 10^20 m^-2
(possibly a little lower and higher)

vary accessibility near the high end of density range
by changing LH phasing to 60 and 135 deg (nonideal)

compare with limiter plasma if time allows

Physics Operators Plans

Entered: Aug 23 2007 04:41:57:373PM

Author: Joseph Snipes

Engineering Setup for Friday, 24 August 2007; Run 1070824

MP499A Parametric Decay and Density Limit for LHEH/LHCD
SL: Yuichi Takase
PO: Joe Snipes

Engineering Setup
------------------
Overnight ECDC in Helium

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

Power systems as on 1070807005

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

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

Enable the following gate valves and shutters, assuming no vacuum problems:
ECE, VUV, DNB, Z-bolo shutters

Torvac setup: Gate valves open after the shot

ICRF Setup: E and J ready before the run

LH Setup: LHCD required for this run

DNB: DNB not required but can piggyback
Cryopump: No cryopump for this run

Run plan:
D, 5.4T, 1MA
start with low density LSN shot
1070807005 with Ip changed from 0.9MA to 1MA

LH 90deg ideal phasing
start 0.95s stop 1.3s
7 segments (50ms/seg)
1: 50-75kW
2-3: 75
4-5: 30
6-7: 75

ICRF (J port) 2MW
1.15-1.3s

A-side reciprocating Langmuir probe
2 plunges up to the LCFS, with peak insertion times
at 1.05s and 1.25s

L-mode/H-mode comparison with sequentially increasing density
approximate range
nel_04 = (0.5 - 1.5) x 1020 m-2
(possibly a little lower and higher)

vary accessibility near the high end of density range
by changing LH phasing to 60 and 135 deg (nonideal)

compare with limiter plasma if time allows

Session Leader Summaries

Entered: Aug 26 2007 02:11:22:947PM

Author: Eric Edlund

MP #495 a

Summary for shots 033 through 035.

The plan was for these remaining shots was to run a combination of LH and ICRH in the current ramp, this time with the LH preceding the ICRH. This was a follow-up on 1070823, where due to multiple cell accesses, we did not have time to complete this scan.

For these shots, LH was turned on at 0.100 seconds, and the ICRH at 0.150 seconds.

Shot 033 had 400 kW of LH power at 90 degree phasing. The PCI data system did not acquire data during the time window of interetest, so o observation could be made from this. Magnetics showed no signs of Alfven Cascades, though some TAEs were present following the ICRH. A disruption occured later in the shot.

Shot 034 was a fizzle.

Shot 035 had 400 kW of LH power at 105 degree phasing, an early trip cut the LH power from 0.10 to 0.12 seconds, and was then steady from 0.12 to 0.15 seconds. The PCI system (this time with the correct time window), saw no signs of Alfven cascades before or after the ICRH was turned on.

The case with LH at 105 degree phasing (shot 035) had a sawtooth entry time about 50 ms earlier than in the 90 degree case (shot 033). Direct comparison of the role of LH in this is not entirely clear due to the loss of power in the first 30 ms of the LH pulse on shot 035. Investigations with the hard x-ray system also show that the fast-electron density is not hollow, suggesting that the current is being driven on-axis.

Entered: Aug 26 2007 07:06:13:353PM

Author: Yuichi Takase

MP499A Parametric Decay and Density Limit for LHEH/LHCD
SL: Yuichi Takase
PO: Joe Snipes

The purpose of this experiment was to investigate the dependence of parametric decay instability on edge (inside/outside the LCFS) density and temperature under ITER relevant conditions, i.e., in diverted configuration at ITER magnetic field. Comparison was made between L-mode and H-mode conditions, and for different LH wavenumber spectra. These experimental results provide important information for determining the frequency for the ITER LHCD system.

Frequency spectra near the LH pump frequency (for lower and upper sidebands) and near zero frequency (for low frequency quasi-modes) were obtained by splitting the signal from a midplane RF electrostatic probe on the LH grill and sweeping two spectrum analyzers over 20ms. In addition, frequency integrated RF wave power was measured using the NE (northeast) tip of the A-side reciprocating Langmuir probe to obtain the radial profile of RF wave power (passband of the filter included both the pump and the sideband LH waves).

This was a very productive run. A number of interesting results were obtained. Two 100ms LH pulses, 1st without ICRF (L-mode) and 2nd with ICRF (H-mode), were used. A density scan with LH at 90 degree current drive phasing
(n_parallel = 2.3) indicated that interaction with electrons disappears around nel_04 = 0.6e20m-2. Intense parametric decay is not observed until the density is around nel_04 = 0.9e20m-2, substantially higher than where interaction with electrons disappears.

For the same density, parametric decay is weaker in H-mode, and the spectral shape indicates that the maximum growth rate occurs at a region where the local temperature is higher. A similar result was observed at 60 degree phasing. Unfortunately poor LH coupling prevented injection of LH power with high wavenumber (120 degree phasing) at low densities. At the same denisity, waves with smaller wavenumber (less accessible waves) tend to excite stronger parametric decay.

A-side reciprocating Langmuir probe detected large amplitude RF signal at low densities. The wave amplitude decreased rapidly at densities nel_04 > 0.9e20m-2. The radial profile of RF wave amplitude was not monotonic, but increased and decreased during a radial scan, indicating that the wave field is localized radially. The localization was very pronounced at densities around nel_04 = 1.0e20m-2 (shot 011, for example).

There were difficulties coupling LH power into low and high density discharges. Magnetic field scan and comparison between limiter and divertor discharges were not performed. Further analysis is in progress.

Physics Operator Summaries

Entered: Aug 24 2007 05:24:22:763PM

Author: Joseph Snipes

It was a good run. The machine and both RF systems worked quite well. Startups were fairly reliable including a fizzle following each major disruption. Parametric decay instabilities were observed on a number of shots except at very low density, as expected. The last few shots were also devoted to current rise with combined LH+ICRF and a number of TAEs were observed, though no Alfven cascades were observed. There were 35 shots with 30 plasmas and 5 fizzles.

Shot,Duration(s),Ipmax(MA),Result Shot,Duration(s),Ipmax,Result
| 01 0.243 0.681 Plasma | 02 1.965 1.006 Plasma |
| 03 1.984 1.006 Plasma | 04 1.985 1.005 Plasma |
| 05 1.984 1.009 Plasma | 06 1.985 1.005 Plasma |
| 07 2.020 1.003 Plasma | 08 1.926 0.999 Plasma |
| 09 2.020 1.003 Plasma | 10 2.010 1.006 Plasma |
| 11 1.754 1.000 Plasma | 12 0.000 0.055 Fizzle |
| 13 1.737 1.000 Plasma | 14 1.863 1.001 Plasma |
| 15 1.305 1.024 Plasma | 16 0.000 0.049 Fizzle |
| 17 1.313 1.014 Plasma | 18 0.000 0.050 Fizzle |
| 19 1.892 1.000 Plasma | 20 0.000 0.050 Fizzle |
| 21 1.806 1.000 Plasma | 22 1.970 1.009 Plasma |
| 23 1.993 1.007 Plasma | 24 1.997 1.005 Plasma |
| 25 1.997 1.003 Plasma | 26 1.997 1.005 Plasma |
| 27 1.997 1.005 Plasma | 28 1.996 1.004 Plasma |
| 29 1.997 1.004 Plasma | 30 1.997 1.005 Plasma |
| 31 1.998 1.007 Plasma | 32 1.997 1.003 Plasma |
| 33 0.408 0.863 Plasma | 34 0.000 0.053 Fizzle |
| 35 0.906 0.857 Plasma
Date 1070824: 35 shots. 30 plasmas. 5 fizzles. 0 duds. 0 System Error.
(Plasma = Ip gt 60.0 kA Dud = H_alpha lt 0.40 V)
Total plasma duration: 53.04 s (exceeding -68 kA)

Session Leader Comments

Aug 24 2007 09:16:02:243AM 1070824001 Yuichi Takase D, 5.4T, 1MA, LSN
start with 1070807005 with Ip changed to 1MA
LH: start with 90 deg ideal phasing, two high-power pulses 1.0-1.1 and 1.2-1.3s.
ICRF: J-port 2MW 1.15-1.3s
LH probe spectrum analyzer sweep at 1.25s for 20ms

nl_04=0.37e20, disrupted @ 0.23s

Aug 24 2007 09:32:15:067AM 1070824002 Yuichi Takase Repeat

1MA, nl_04=0.5e20, ICRF OK (2MW), no LH (tripping: outer gap too large?)
ICRF induces H-mode and raises the density to over 0.7e20

Aug 24 2007 09:39:09:390AM 1070824003 Yuichi Takase Repeat with smaller outer gap, more gas

Better, but still no LH (tripping)
H-mode during ICRF

Aug 24 2007 10:15:39:710AM 1070824004 Yuichi Takase Repeat with smaller outer gap, more gas
moved LH probe spectrum sweep to 1.05s

Better, got 1st LH pulse (0.25MW)
no parametric decay

Aug 24 2007 10:33:49:783AM 1070824005 Yuichi Takase moved LH probe spectrum sweep to 1.25s
ad LH power ramp 1.2-1.25s (LH ends at 1.35s)

got partial 2nd LH pulse, partial freq. spectrum
firing A-side reciprocating probe (2 strokes during LH)

Aug 24 2007 10:39:16:637AM 1070824006 Yuichi Takase extend LH pulse to 1.35s
ad LH power ramp 1.2-1.25s (LH ends at 1.35s)

higher density, nel_04=0.75
spectrum at 1.05s, no parametric decay (1st LH pulse)
2nd LH two trips, two trips on ICRF too.

Aug 24 2007 10:48:18:260AM 1070824007 Yuichi Takase lower upper triangularity to reduce LH reflection on top row (did not help much)

higher density, nel_04=0.75 (1.0 during H-mode)
Only partial 2nd LH pulse
spectrum at 1.3s, some parametric decay (peak at 4.47GHz)

Aug 24 2007 11:07:14:430AM 1070824008 Yuichi Takase higher density, nel_04=1.0

good LH pulse, but no ICRF (tripping), so no H-mode
spectrum at 1.05s, parametric decay with about 3 IC sidebands
RLP shows RF power profile peaked part way in
not much electron response to LH (0.4MW)

Aug 24 2007 11:36:11:897AM 1070824009 Yuichi Takase nel_04=1.0
good LH pulse.
ICRF tripping, but got H-mode, and spectrum during H-mode (1.3s)
parametric decay with about 3 IC sidebands, similar to 1st LH pulse

Aug 24 2007 11:40:54:653AM 1070824010 Yuichi Takase repeat, but ICRF with J + E, instead of J only
nel_04=1.0
Both LH and ICRF good. spectrum similar to previous shot.

Aug 24 2007 11:53:48:097AM 1070824011 Yuichi Takase higher density, nel_04=1.25
spectrum still similar (1st LH pulse)
vey sharp peak on RLP (highly localized radially)

Aug 24 2007 11:57:14:943AM 1070824012 Yuichi Takase fizzle

Aug 24 2007 12:16:41:223PM 1070824013 Yuichi Takase Both LH and ICRF good.
spectrum during 2nd LH still look similar.
could be accessibility problem.

Aug 24 2007 12:30:07:247PM 1070824014 Yuichi Takase same density
only got partial spectrum during 1st LH pulse

Aug 24 2007 12:49:18:150PM 1070824015 Yuichi Takase higher density, nel=1.6
1st LH pulse (weaker parametric decay?)
no ICRF, no H-mode

Aug 24 2007 12:54:01:500PM 1070824016 Yuichi Takase fizzle

Aug 24 2007 01:22:19:340PM 1070824017 Yuichi Takase nel_04=1.5
LH phasing changed to 120 deg. to improve accessibility
good LH (0.38MW), ICRF (0.55MW), disrupt at 1.3s
spectrum during 1st LH

Aug 24 2007 01:22:38:390PM 1070824018 Yuichi Takase fizzle

Aug 24 2007 01:55:43:800PM 1070824019 Yuichi Takase nel_04=1.25
got spectrum during 1st LH pulse (0.37MW)

Aug 24 2007 02:01:33:590PM 1070824020 Yuichi Takase fizzle

Aug 24 2007 02:17:26:973PM 1070824021 Yuichi Takase nel_04=1.25 -> 2.0
spectrum during 2nd LH pulse (H-mode)

Aug 24 2007 02:21:03:963PM 1070824022 Yuichi Takase nel_04=1.0 -> 2.0
spectrum during 1st LH pulse (weaker parametric decay)

Aug 24 2007 02:32:08:463PM 1070824023 Yuichi Takase nel_04=0.8 -> 1.5
LH tripping
need to repeat

Aug 24 2007 03:12:46:277PM 1070824024 Yuichi Takase nel_04=0.8 reduced outer gap
LH still tripping

Aug 24 2007 03:13:02:870PM 1070824025 Yuichi Takase nel_04=0.8 reduced outer gap some more
LH still tripping

Aug 24 2007 03:19:06:597PM 1070824026 Yuichi Takase nel_04=0.8 reduced outer gap and upper triangularity some more
LH still tripping
reduce LH power and change spectrum analyzer sweep time for next shot

Aug 24 2007 03:33:08:120PM 1070824027 Yuichi Takase nel_04=0.65 (lower density)
reduced LH power and changed spectrum analyzer sweep timing (1.13-1.15s)
LH still tripping
edge densty probably too low for this wavenumber
try 60 degrees for the next shot

Aug 24 2007 03:40:00:793PM 1070824028 Yuichi Takase LH phasing 60 degrees
nel_04=0.75
LH much better, but no spectrum
spectrum analyzer sweep (1.05-1.07s) was during LH trip

Aug 24 2007 04:38:14:723PM 1070824029 Yuichi Takase LH phasing 60 degrees
nel_04=0.75
Strong parametric decay (1st LH pulse), lower sideband comparable to pump

Aug 24 2007 04:39:30:507PM 1070824030 Yuichi Takase LH phasing 60 degrees
nel_04=0.65
Very weak parametric decay (1st LH pulse)
Large signal on RLP

Aug 24 2007 04:40:49:760PM 1070824031 Yuichi Takase LH phasing 60 degrees
nel_04=0.6 -> 0.9
Weak parametric decay (2nd LH pulse)

Aug 24 2007 04:43:11:903PM 1070824032 Yuichi Takase LH phasing 105 degrees
nel_04=0.9
Weak parametric decay (1st LH pulse)

========================================

End of this MP

Handing over to Miklos

Physics Operator Comments

Aug 24 2007 09:03:32:020AM 1070824001 Joseph Snipes Shot 1: Copied shot 1070807005 and reduced the prepuff to 19 ms duration and
increased Ip to 1 MA. Rotating MHD mode locks at 0.19 s leading to a disruption
at 0.23 s.

Aug 24 2007 09:34:19:240AM 1070824003 Joseph Snipes Shot 3: Increased prepuff by 3 ms to 22 ms duration. Increased RCUR by 3 mm to
reduce the outer gap to improve LH coupling. Runaways starting at 0.03 s. Need
more early gas.

Aug 24 2007 09:48:36:717AM 1070824004 Joseph Snipes Shot 4: Increased prepuff by 3 ms to 25 ms duration. Increased RCUR by 2.5 mm to
further reduce the outer gap to improve LH coupling. Good shot.

Aug 24 2007 10:03:01:613AM 1070824005 Joseph Snipes Shot 5: Increased prepuff by 2 ms to 27 ms duration. Good shot.

Aug 24 2007 10:16:52:150AM 1070824006 Joseph Snipes Shot 6: Raised nl04 to 7 x 10^19 m^-2. Good shot.

Aug 24 2007 10:33:36:283AM 1070824007 Joseph Snipes Shot 7: Increased RXU by 1 cm to better match the LH launcher. Increased the
flattop length by 0.1 s for Steve Scott for the DNB out to 1.6 s on Ip and 1.7 s
on TF. Good shot.

Aug 24 2007 10:50:11:967AM 1070824008 Joseph Snipes Shot 8: Increased nl04 to 1 x 10^20 m^-2. Lengthened the flattop out to 1.7 s
for Ip and all P's. Disrupted in rampdown at 1.91 s.

Aug 24 2007 11:11:06:700AM 1070824009 Joseph Snipes Shot 9: Changed rampdown slightly to attempt to avoid the late disruption.
Decreased prepuff to 20 ms duration. NINJA puff at 0.7 s. RCUR decreased by
2.0 mm as CLEARIN was decreased by 2 mm. Good shot.

Aug 24 2007 11:22:35:797AM 1070824010 Joseph Snipes Shot 10: Enabled argon gas with a 70 ms puff from 0.3 to 0.37 s. Extended nl04
to 1.5 s at 1 x 10^20 m^-2. Readjusted CLEARIN and RCUR to try to flatten out
the outer gap. Good shot.

Aug 24 2007 11:34:56:253AM 1070824011 Joseph Snipes Shot 11: Raised nl04 to 1.22 x 10^20 m^-2. Increased argon pulse length to
0.1 s. Reduced prepuff by 1 ms to 19 ms duration. Decreased RCUR by 2.5 mm to
increase the outer gap by 5 mm. Good shot though it disrupted in the rampdown
at 1.73 s.

Aug 24 2007 11:47:32:820AM 1070824012 Joseph Snipes Shot 12: Extended EF2_by_EF4 out to 1.7 s. Reduced RCUR by 2.5 mm to again
increase the outer gap by 5 mm. Fizzle!

Aug 24 2007 12:16:55:177PM 1070824013 Joseph Snipes Shot 13: Reduced prepuff to 17 ms duration. NINJA puff moved to 0.8 s. Good
shot but disrupted in rampdown again at 1.73 s. Railing the OH1 supply.

Aug 24 2007 12:35:14:737PM 1070824014 Joseph Snipes Shot 14: Increased current limit on OH1 to +/- 30 kA. Increased the ICRF pulse
out to 1.5 s. Disrupted a bit later at 1.86 s.

Aug 24 2007 12:38:47:417PM 1070824015 Joseph Snipes Shot 15: Reduced flattop on all P's to 1.5 s. Increased nl04 to 1.6 x 10^20 m^-2.
Disrupted at 1.3 s.

Aug 24 2007 12:50:57:387PM 1070824016 Joseph Snipes Shot 16: Reduced nl04 to 1.5 x 10^20 m^-2. Reduced prepuff by 2 ms to 15 ms
duration. Fizzle!

Aug 24 2007 01:05:31:567PM 1070824017 Joseph Snipes Shot 17: Repeat. Disrupted at 1.31 s.

Aug 24 2007 01:16:31:487PM 1070824018 Joseph Snipes Shot 18: Reduced nl04 to 1.22 x 10^20 m^-2. Fizzle!

Aug 24 2007 01:29:19:540PM 1070824019 Joseph Snipes Shot 19: Repeat. Good shot.

Aug 24 2007 01:42:20:670PM 1070824020 Joseph Snipes Shot 20: Increased prepuff by 2 ms to 17 ms duration. Fizzle!

Aug 24 2007 01:56:10:190PM 1070824021 Joseph Snipes Shot 21: Reduced prepuff by 2 ms to 15 ms duration. Good shot. Disrupted in
rampdown around 1.78 s.

Aug 24 2007 02:08:17:333PM 1070824022 Joseph Snipes Shot 22: Reduced nl04 to 1 x 10^20 m^-2. Reduced prepuff to 14 ms duration.
Good shot.

Aug 24 2007 02:27:57:457PM 1070824023 Joseph Snipes Shot 23: Reduced nl04 to 0.7 x 10^20 m^-2. Good shot.

Aug 24 2007 02:34:56:907PM 1070824024 Joseph Snipes Shot 24: Increased RCUR by 4 mm to reduce the outer gap. Good shot.

Aug 24 2007 02:53:50:950PM 1070824025 Joseph Snipes Shot 25: Increased RCUR by 2 mm to reduce the outer gap some more. Also
increased RXU by 1 to 1.5 cm to better match the shape of the LH launcher.
Good shot.

Aug 24 2007 03:14:29:467PM 1070824026 Joseph Snipes Shot 26: Increased RCUR by 0.5 mm to reduce the outer gap a bit more. Also
increased RXU to 1.0 cm to better match the shape of the LH launcher. Good
shot.

Aug 24 2007 03:21:38:960PM 1070824027 Joseph Snipes Shot 27: Increased RCUR early to try to flatten the outer gap in the current
flattop to the lower value of outer gap. Reduced nl04 to 6 x 10^19 m^-2 to try
to get the desired 7 x 10^19 m^-2. Good shot.

Aug 24 2007 03:34:59:430PM 1070824028 Joseph Snipes Shot 28: Reloaded shot 26 but now with 60 degree phasing on the LH launcher.
Good shot.

Aug 24 2007 03:48:58:000PM 1070824029 Joseph Snipes Shot 29: Repeat. Good shot.

Aug 24 2007 04:06:00:223PM 1070824030 Joseph Snipes Shot 30: Reduced nl04 to 5 x 10^19 m^-2. Good shot.

Aug 24 2007 04:20:57:730PM 1070824031 Joseph Snipes Shot 31: Repeat. Good shot.

Aug 24 2007 04:33:36:360PM 1070824032 Joseph Snipes Shot 32: Increased nl04 to 8 x 10^19 m^-2. LH phase changed to 105 degrees.
Good shot.

Aug 24 2007 04:43:20:683PM 1070824033 Joseph Snipes Shot 33: Changing to Miklos/Eric's program from yesterday for the last two shots.
Loaded shot 1070823010. Turning on LH from 0.1 s and ICRF from 0.14 s. LH
phasing set to 90 degrees. Disrupted at 0.4 s.

Aug 24 2007 04:58:42:803PM 1070824034 Joseph Snipes Shot 34: Reduced prepuff to 14 ms duration. Fizzle.

Aug 24 2007 05:08:52:083PM 1070824035 Joseph Snipes Shot 35: LPI enabled with a pellet after 0.5 s. Increased prepuff to 15 ms
duration. Disrupted at 0.9 s. No pellet.

Engineering Operator Comments

Shot Time Type Status Comment

1 09:00:02:797AM Plasma Ok

2 09:13:19:693AM Plasma Ok

3 09:27:01:590AM Plasma Ok

4 09:43:38:600AM Plasma Ok

5 10:01:11:330AM Plasma Ok

6 10:15:06:867AM Plasma Ok

7 10:31:48:470AM Plasma Ok

8 10:47:42:947AM Plasma Ok

9 11:06:14:397AM Plasma Ok

10 11:19:46:730AM Plasma Ok

11 11:32:41:517AM Plasma Ok

12 11:45:34:927AM Plasma Ok

13 11:58:42:510AM Plasma Ok

14 12:17:58:413PM Plasma Ok

15 12:35:49:177PM Plasma Ok

16 12:48:56:163PM Plasma Ok

17 01:01:59:450PM Plasma Ok

18 01:14:54:830PM Plasma Ok

19 01:27:20:050PM Plasma Ok

20 01:40:16:570PM Plasma Ok

21 01:53:49:733PM Plasma Ok

22 02:06:20:300PM Plasma Ok

23 02:19:21:930PM Plasma Ok

24 02:32:44:480PM Plasma Ok

25 02:50:50:650PM Plasma Ok

26 03:03:20:857PM Plasma Ok

27 03:20:01:367PM Plasma Ok

28 03:33:20:193PM Plasma Ok

29 03:47:19:970PM Plasma Ok

30 04:03:44:077PM Plasma Ok

31 04:16:18:253PM Plasma Ok

32 04:28:44:117PM Plasma Ok

33 04:41:11:527PM Plasma Ok

34 04:53:57:407PM Plasma Ok

35 05:06:11:143PM Plasma Ok

System Availability

Aug 24 2007 08:59:39:017AM

System Available Comment Availability
Changed Owner Description Who Can
Change
Active MHD yes Fully operational Mar 28 2007 09:19PM (sears) Joe Snipes Active MHD Antenna sears,snipes
BES yes vertical array of six views at R ~ 87.3 cm, radial array of three views out to R ~ 89 cm, both at outboard midplane. Three discrete fiber views of beam at R ~ 70.0, 76.5 and 82.5 cm. Feb 06 2007 10:00AM (bravenec) Ron Bravenec Beam Emission Spectroscopy bravenec
Bolometers yes 2Pi diode operational, 2Pi foil being upgrade for noise resistance. Midplane foils calibrated and operational, data in the tree. Outboard midplane AXUV calibrated and operational, data in the tree. Full midplane and divertor views being digitized. Jul 19 2007 04:48PM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization yes First Boronization 5/9/07 May 10 2007 04:55PM (irby) Jim Irby Boronization dekow,irby
CNPA no Jan 14 2007 02:06PM Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor yes The cryopump is operational in a manual mode. We will be working on interfacing its control system with the C-Mod state machine for semi-automatic operation. May 30 2007 07:58PM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard
CXRS yes The pedestal toroidal array was installed, spatially and absolutely calibrated. There are 10 chords intersect the beam at the major_R_range=[75,4:87.4]cm. Spatial resolution: 1.2 cm. The F-top poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[67.8:91.0]cm. Spatial resolution: 1.22 cm. Jun 20 2007 05:35PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,rachmcd,rowan
D Alpha yes \ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are available Mar 11 2007 10:28PM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe
Dalsa yes camera is re-installed, and view has been calibrated Feb 26 2007 03:28PM (marmar) Earl Marmar Visible Bremsstrahlung marmar
Disruption Mitigation no Jan 14 2007 02:02PM Bob 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,ldorf,terry
DNB yes All systems are operational, but as of 28 March 2007, the beam needs additional conditioning for full performance shots Mar 28 2007 09:36AM (beals) Bob Granetz Diagnostic Beam beals,granetz
FRC-ECE no Still problems with low freq. RF section. Upper 16 channel working Aug 16 2007 02:45PM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips
G-Side Ratiomatic yes The gauge is operational. Mar 30 2007 10:54AM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
GPC yes Chs 1-8 operational. May 24 2007 08:40AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPC2 yes Most channels (except 1,5,8,10,17) operational. Jun 08 2007 08:29AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPI yes New view just outside of the lower X-point is operational, but data is being archived locally , not to the tree. Midplane GPI is not operational. Mar 27 2007 01:59PM (terry) Jim Terry Gas Puff Imaging terry,zweben
H/D yes spectral calibration needs to be checked, but system should be ready for the run Feb 26 2007 03:28PM (marmar) Earl Marmar H/D Ratio marmar
Hirex Jr yes Mar 06 2007 08:59AM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr yes Storing Data, but profiles not yet available Apr 27 2007 01:20PM (ince) John Rice High Resolution X-Ray ince,rice
HXR yes Something might be wrong with channel 26; all others working fine. Mar 23 2007 10:43AM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt
ICRF D-Antenna yes 80.5 MHz. Max power is about 1.5 MW Jun 20 2007 09:23AM (ylin) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes 80 MHz. Maxc power is about 1.5 MW Jun 20 2007 09:23AM (ylin) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes 78 MHz. 4-strap configuration. Max ~ 3 MW. Jul 17 2007 03:52PM (ylin) Steve Wukitch J-port antenna wukitch,ylin
Lower Hybrid no 6B Pressure window failed. Arcing in 6B, 8B,9B & 23B. May 04 2007 03:44PM (dterry) Ron Parker Lower Hybrid dterry,parker
LPI yes Apr 26 2007 08:35PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha yes Midplane calibrated and operational, data being stored in tree. Divertor views showing significant noise, and not available. Upper view being digitized and analyzed. Jul 19 2007 04:49PM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke
McPherson yes Working normally. Apr 19 2007 09:52AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Operational. Mar 28 2007 08:33AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes E-Top, E-Bottom, F-top (cryo), G-side, and B-bottom are operational. F-top gauge has a 'sniffer tube' to measure pressures in cryopump gas box. Mar 20 2007 06:42PM (g) Brian LaBombard Baratron pressure gauges labombard
MLP no Initial tests on the A-port scanning probe went well. We need to take care of some control glitches that caused some component failures. May 30 2007 08:01PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard
MSE no (1) Bandpass filters replacement underway (2) Beam-into-gas spectrum measurement underway (3) Shutter mechanism currently unstable; remains open. (4) Expect beam-into-gas calibrations complete about 4/24. Apr 03 2007 12:05PM (sscott) Steve Scott Motional Stark Effect jinseok,sscott
Neutrons yes Both neutron systems are fully operational Apr 05 2007 11:19AM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes operational Mar 21 2007 04:29PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby
NINJA yes All capillaries displayed by the NINJA_CONTROL GUI have been tested. NINJA puffed on 1070329009 (A-B limiter). Mar 29 2007 11:47AM (terry) Brian LaBombard NINJA gas puff labombard,terry
PCI yes The system is to be optimized. May 30 2007 01:12PM (lianglin) Miklos Porkolab Phase Contrast Imaging edlund,lianglin,ntsujii,porkolab
Penning Gauges yes 8 in-situ Penning ionization gauges appear to be operational: CB_DivU, CB_OutL, CB_DivL, KA_OutU, KA_OutL, B_DivL, Cryo_1, Cryo_2. Cryo_1 and Cryo_2 are new and installed in the upper cryopump 'gas-box'. Mar 13 2007 10:01PM (labombard) Brian LaBombard Penning Ionization Gauges labombard
Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV (without an ND filter) are operational. Mar 27 2007 01:53PM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe
Polarimeter no Retro shutter closed Mar 15 2007 11:00AM (irby) Jim Irby C-Mod Polarimeter irby
Probe Array - ISD yes Probes at 15 of the 16 poloidal locations ('ramped' geometry) are operational. n,Te, particle flux reported every 10 ms. Mar 13 2007 09:47PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH yes All 6 probes on the lower hybrid launcher (tungsten, 1.5 mm projection) are operational. Mar 13 2007 09:46PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes Probes at 10 poloidal locations (one 'ramped' and one 'flush') are operational. n,Te, particle flux reported every 10 ms. Mar 13 2007 09:45PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard
Probe Array - UDIV yes 14 probes are operational ('ramped' geometry). n,Te, particle flux reported every 10 ms.Two high-gain channels are installed and operational for ECDC plasma diagnosis. Mar 13 2007 12:46PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes The 50, 60, 75 and 88 (u,l and center) are installed. The variable frequency channel is being tested. 110 is not functioning Aug 16 2007 01:45PM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Perpendicular Mach probe head is installed. The drive is operational. Mar 15 2007 09:09PM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes Perpendicular Mach probe head is installed. The probe drive is now operational. Mar 13 2007 09:51PM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP yes A-port WASP successfully collected data on 04/04. Some intermittent open circuit on SE Electrode. K-WASP took data on 04/11. Both ready to scan as needed. Apr 12 2007 04:18PM (nsmick) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
TCI yes NL_04 at 71.04 cm from 3/9/07 calibration May 23 2007 07:38AM (irby) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes 2 lasers, 8 spatial channels. Density is calibrated based on ECE cutoffs obtained on 4 May 2007. Old spectrometers have been removed. Additional spatial channels have been added, but are not yet calibrated. Aug 07 2007 10:08AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma
TS - Edge yes 2 lasers, 20 spatial channels. Fiber holder position is -121.0mm. Density is calibrated according to Raman scattering results from 26 May, supplemented with ECE cutoffs obtained on shot 1070531015. Aug 07 2007 10:08AM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma
Vispec yes 350 and 670 nm, 4 spatial channels May 04 2007 01:02PM (agraf) Alex Graf Visible Spectrometer agraf

Aug 24 2007 11:45:15:393AM

System Available Comment Availability
Changed Owner Description Who Can
Change
Active MHD yes Fully operational Mar 28 2007 09:19PM (sears) Joe Snipes Active MHD Antenna sears,snipes
BES yes vertical array of six views at R ~ 87.3 cm, radial array of three views out to R ~ 89 cm, both at outboard midplane. Three discrete fiber views of beam at R ~ 70.0, 76.5 and 82.5 cm. Feb 06 2007 10:00AM (bravenec) Ron Bravenec Beam Emission Spectroscopy bravenec
Bolometers yes 2Pi diode operational, 2Pi foil being upgrade for noise resistance. Midplane foils calibrated and operational, data in the tree. Outboard midplane AXUV calibrated and operational, data in the tree. Full midplane and divertor views being digitized. Jul 19 2007 04:48PM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization yes First Boronization 5/9/07 May 10 2007 04:55PM (irby) Jim Irby Boronization dekow,irby
CNPA no Jan 14 2007 02:06PM Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor yes The cryopump is operational in a manual mode. We will be working on interfacing its control system with the C-Mod state machine for semi-automatic operation. May 30 2007 07:58PM (labombard) Brian LaBombard Upper Divertor Cryopump irby,labombard
CXRS yes The pedestal toroidal array was installed, spatially and absolutely calibrated. There are 10 chords intersect the beam at the major_R_range=[75,4:87.4]cm. Spatial resolution: 1.2 cm. The F-top poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[67.8:91.0]cm. Spatial resolution: 1.22 cm. Jun 20 2007 05:35PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,rachmcd,rowan
D Alpha yes \ha2_bright and \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 are available Mar 11 2007 10:28PM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe
Dalsa yes camera is re-installed, and view has been calibrated Feb 26 2007 03:28PM (marmar) Earl Marmar Visible Bremsstrahlung marmar
Disruption Mitigation no Jan 14 2007 02:02PM Bob 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,ldorf,terry
DNB yes All systems are operational, but as of 28 March 2007, the beam needs additional conditioning for full performance shots Mar 28 2007 09:36AM (beals) Bob Granetz Diagnostic Beam beals,granetz
FRC-ECE no Still problems with low freq. RF section. Upper 16 channel working Aug 16 2007 02:45PM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips
G-Side Ratiomatic yes The gauge is operational. Mar 30 2007 10:54AM (labombard) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
GPC yes Chs 1-8 operational. May 24 2007 08:40AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPC2 yes Most channels (except 1,5,8,10,17) operational. Jun 08 2007 08:29AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPI yes New view just outside of the lower X-point is operational, but data is being archived locally , not to the tree. Midplane GPI is not operational. Mar 27 2007 01:59PM (terry) Jim Terry Gas Puff Imaging terry,zweben
H/D yes spectral calibration needs to be checked, but system should be ready for the run Feb 26 2007 03:28PM (marmar) Earl Marmar H/D Ratio marmar
Hirex Jr yes Mar 06 2007 08:59AM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr yes Storing Data, but profiles not yet available Apr 27 2007 01:20PM (ince) John Rice High Resolution X-Ray ince,rice
HXR yes Something might be wrong with channel 26; all others working fine. Mar 23 2007 10:43AM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt
ICRF D-Antenna yes 80.5 MHz. Max power is about 1.5 MW Jun 20 2007 09:23AM (ylin) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes 80 MHz. Maxc power is about 1.5 MW Jun 20 2007 09:23AM (ylin) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes 78 MHz. 4-strap configuration. Max ~ 3 MW. Jul 17 2007 03:52PM (ylin) Steve Wukitch J-port antenna wukitch,ylin
Lower Hybrid yes LH is available with transmitters 2-11 working. Aug 24 2007 11:36AM (dterry) Ron Parker Lower Hybrid dterry,parker
LPI yes Apr 26 2007 08:35PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha yes Midplane calibrated and operational, data being stored in tree. Divertor views showing significant noise, and not available. Upper view being digitized and analyzed. Jul 19 2007 04:49PM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke
McPherson yes Working normally. Apr 19 2007 09:52AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Operational. Mar 28 2007 08:33AM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes E-Top, E-Bottom, F-top (cryo), G-side, and B-bottom are operational. F-top gauge has a 'sniffer tube' to measure pressures in cryopump gas box. Mar 20 2007 06:42PM (g) Brian LaBombard Baratron pressure gauges labombard
MLP no Initial tests on the A-port scanning probe went well. We need to take care of some control glitches that caused some component failures. May 30 2007 08:01PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard
MSE no (1) Bandpass filters replacement underway (2) Beam-into-gas spectrum measurement underway (3) Shutter mechanism currently unstable; remains open. (4) Expect beam-into-gas calibrations complete about 4/24. Apr 03 2007 12:05PM (sscott) Steve Scott Motional Stark Effect jinseok,sscott
Neutrons yes Both neutron systems are fully operational Apr 05 2007 11:19AM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes operational Mar 21 2007 04:29PM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby
NINJA yes All capillaries displayed by the NINJA_CONTROL GUI have been tested. NINJA puffed on 1070329009 (A-B limiter). Mar 29 2007 11:47AM (terry) Brian LaBombard NINJA gas puff labombard,terry
PCI yes The system is to be optimized. May 30 2007 01:12PM (lianglin) Miklos Porkolab Phase Contrast Imaging edlund,lianglin,ntsujii,porkolab
Penning Gauges yes 8 in-situ Penning ionization gauges appear to be operational: CB_DivU, CB_OutL, CB_DivL, KA_OutU, KA_OutL, B_DivL, Cryo_1, Cryo_2. Cryo_1 and Cryo_2 are new and installed in the upper cryopump 'gas-box'. Mar 13 2007 10:01PM (labombard) Brian LaBombard Penning Ionization Gauges labombard
Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV (without an ND filter) are operational. Mar 27 2007 01:53PM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe
Polarimeter no Retro shutter closed Mar 15 2007 11:00AM (irby) Jim Irby C-Mod Polarimeter irby
Probe Array - ISD yes Probes at 15 of the 16 poloidal locations ('ramped' geometry) are operational. n,Te, particle flux reported every 10 ms. Mar 13 2007 09:47PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH yes All 6 probes on the lower hybrid launcher (tungsten, 1.5 mm projection) are operational. Mar 13 2007 09:46PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes Probes at 10 poloidal locations (one 'ramped' and one 'flush') are operational. n,Te, particle flux reported every 10 ms. Mar 13 2007 09:45PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard
Probe Array - UDIV yes 14 probes are operational ('ramped' geometry). n,Te, particle flux reported every 10 ms.Two high-gain channels are installed and operational for ECDC plasma diagnosis. Mar 13 2007 12:46PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes The 50, 60, 75 and 88 (u,l and center) are installed. The variable frequency channel is being tested. 110 is not functioning Aug 16 2007 01:45PM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Perpendicular Mach probe head is installed. The drive is operational. Mar 15 2007 09:09PM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes Perpendicular Mach probe head is installed. The probe drive is now operational. Mar 13 2007 09:51PM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP yes A-port WASP successfully collected data on 04/04. Some intermittent open circuit on SE Electrode. K-WASP took data on 04/11. Both ready to scan as needed. Apr 12 2007 04:18PM (nsmick) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
TCI yes NL_04 at 71.04 cm from 3/9/07 calibration May 23 2007 07:38AM (irby) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes 2 lasers, 8 spatial channels. Density is calibrated based on ECE cutoffs obtained on 4 May 2007. Old spectrometers have been removed. Additional spatial channels have been added, but are not yet calibrated. Aug 07 2007 10:08AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma
TS - Edge yes 2 lasers, 20 spatial channels. Fiber holder position is -121.0mm. Density is calibrated according to Raman scattering results from 26 May, supplemented with ECE cutoffs obtained on shot 1070531015. Aug 07 2007 10:08AM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma
Vispec yes 350 and 670 nm, 4 spatial channels May 04 2007 01:02PM (agraf) Alex Graf Visible Spectrometer agraf

Session Leader Comments
Aug 24 2007 09:16:02:243AM	1070824001	Yuichi Takase	D, 5.4T, 1MA, LSN start with 1070807005 with Ip changed to 1MA LH: start with 90 deg ideal phasing, two high-power pulses 1.0-1.1 and 1.2-1.3s. ICRF: J-port 2MW 1.15-1.3s LH probe spectrum analyzer sweep at 1.25s for 20ms nl_04=0.37e20, disrupted @ 0.23s
Aug 24 2007 09:32:15:067AM	1070824002	Yuichi Takase	Repeat 1MA, nl_04=0.5e20, ICRF OK (2MW), no LH (tripping: outer gap too large?) ICRF induces H-mode and raises the density to over 0.7e20
Aug 24 2007 09:39:09:390AM	1070824003	Yuichi Takase	Repeat with smaller outer gap, more gas Better, but still no LH (tripping) H-mode during ICRF
Aug 24 2007 10:15:39:710AM	1070824004	Yuichi Takase	Repeat with smaller outer gap, more gas moved LH probe spectrum sweep to 1.05s Better, got 1st LH pulse (0.25MW) no parametric decay
Aug 24 2007 10:33:49:783AM	1070824005	Yuichi Takase	moved LH probe spectrum sweep to 1.25s ad LH power ramp 1.2-1.25s (LH ends at 1.35s) got partial 2nd LH pulse, partial freq. spectrum firing A-side reciprocating probe (2 strokes during LH)
Aug 24 2007 10:39:16:637AM	1070824006	Yuichi Takase	extend LH pulse to 1.35s ad LH power ramp 1.2-1.25s (LH ends at 1.35s) higher density, nel_04=0.75 spectrum at 1.05s, no parametric decay (1st LH pulse) 2nd LH two trips, two trips on ICRF too.
Aug 24 2007 10:48:18:260AM	1070824007	Yuichi Takase	lower upper triangularity to reduce LH reflection on top row (did not help much) higher density, nel_04=0.75 (1.0 during H-mode) Only partial 2nd LH pulse spectrum at 1.3s, some parametric decay (peak at 4.47GHz)
Aug 24 2007 11:07:14:430AM	1070824008	Yuichi Takase	higher density, nel_04=1.0 good LH pulse, but no ICRF (tripping), so no H-mode spectrum at 1.05s, parametric decay with about 3 IC sidebands RLP shows RF power profile peaked part way in not much electron response to LH (0.4MW)
Aug 24 2007 11:36:11:897AM	1070824009	Yuichi Takase	nel_04=1.0 good LH pulse. ICRF tripping, but got H-mode, and spectrum during H-mode (1.3s) parametric decay with about 3 IC sidebands, similar to 1st LH pulse
Aug 24 2007 11:40:54:653AM	1070824010	Yuichi Takase	repeat, but ICRF with J + E, instead of J only nel_04=1.0 Both LH and ICRF good. spectrum similar to previous shot.
Aug 24 2007 11:53:48:097AM	1070824011	Yuichi Takase	higher density, nel_04=1.25 spectrum still similar (1st LH pulse) vey sharp peak on RLP (highly localized radially)
Aug 24 2007 11:57:14:943AM	1070824012	Yuichi Takase	fizzle
Aug 24 2007 12:16:41:223PM	1070824013	Yuichi Takase	Both LH and ICRF good. spectrum during 2nd LH still look similar. could be accessibility problem.
Aug 24 2007 12:30:07:247PM	1070824014	Yuichi Takase	same density only got partial spectrum during 1st LH pulse
Aug 24 2007 12:49:18:150PM	1070824015	Yuichi Takase	higher density, nel=1.6 1st LH pulse (weaker parametric decay?) no ICRF, no H-mode
Aug 24 2007 12:54:01:500PM	1070824016	Yuichi Takase	fizzle
Aug 24 2007 01:22:19:340PM	1070824017	Yuichi Takase	nel_04=1.5 LH phasing changed to 120 deg. to improve accessibility good LH (0.38MW), ICRF (0.55MW), disrupt at 1.3s spectrum during 1st LH
Aug 24 2007 01:22:38:390PM	1070824018	Yuichi Takase	fizzle
Aug 24 2007 01:55:43:800PM	1070824019	Yuichi Takase	nel_04=1.25 got spectrum during 1st LH pulse (0.37MW)
Aug 24 2007 02:01:33:590PM	1070824020	Yuichi Takase	fizzle
Aug 24 2007 02:17:26:973PM	1070824021	Yuichi Takase	nel_04=1.25 -> 2.0 spectrum during 2nd LH pulse (H-mode)
Aug 24 2007 02:21:03:963PM	1070824022	Yuichi Takase	nel_04=1.0 -> 2.0 spectrum during 1st LH pulse (weaker parametric decay)
Aug 24 2007 02:32:08:463PM	1070824023	Yuichi Takase	nel_04=0.8 -> 1.5 LH tripping need to repeat
Aug 24 2007 03:12:46:277PM	1070824024	Yuichi Takase	nel_04=0.8 reduced outer gap LH still tripping
Aug 24 2007 03:13:02:870PM	1070824025	Yuichi Takase	nel_04=0.8 reduced outer gap some more LH still tripping
Aug 24 2007 03:19:06:597PM	1070824026	Yuichi Takase	nel_04=0.8 reduced outer gap and upper triangularity some more LH still tripping reduce LH power and change spectrum analyzer sweep time for next shot
Aug 24 2007 03:33:08:120PM	1070824027	Yuichi Takase	nel_04=0.65 (lower density) reduced LH power and changed spectrum analyzer sweep timing (1.13-1.15s) LH still tripping edge densty probably too low for this wavenumber try 60 degrees for the next shot
Aug 24 2007 03:40:00:793PM	1070824028	Yuichi Takase	LH phasing 60 degrees nel_04=0.75 LH much better, but no spectrum spectrum analyzer sweep (1.05-1.07s) was during LH trip
Aug 24 2007 04:38:14:723PM	1070824029	Yuichi Takase	LH phasing 60 degrees nel_04=0.75 Strong parametric decay (1st LH pulse), lower sideband comparable to pump
Aug 24 2007 04:39:30:507PM	1070824030	Yuichi Takase	LH phasing 60 degrees nel_04=0.65 Very weak parametric decay (1st LH pulse) Large signal on RLP
Aug 24 2007 04:40:49:760PM	1070824031	Yuichi Takase	LH phasing 60 degrees nel_04=0.6 -> 0.9 Weak parametric decay (2nd LH pulse)
Aug 24 2007 04:43:11:903PM	1070824032	Yuichi Takase	LH phasing 105 degrees nel_04=0.9 Weak parametric decay (1st LH pulse) ======================================== End of this MP Handing over to Miklos

Physics Operator Comments
Aug 24 2007 09:03:32:020AM	1070824001	Joseph Snipes	Shot 1: Copied shot 1070807005 and reduced the prepuff to 19 ms duration and increased Ip to 1 MA. Rotating MHD mode locks at 0.19 s leading to a disruption at 0.23 s.
Aug 24 2007 09:34:19:240AM	1070824003	Joseph Snipes	Shot 3: Increased prepuff by 3 ms to 22 ms duration. Increased RCUR by 3 mm to reduce the outer gap to improve LH coupling. Runaways starting at 0.03 s. Need more early gas.
Aug 24 2007 09:48:36:717AM	1070824004	Joseph Snipes	Shot 4: Increased prepuff by 3 ms to 25 ms duration. Increased RCUR by 2.5 mm to further reduce the outer gap to improve LH coupling. Good shot.
Aug 24 2007 10:03:01:613AM	1070824005	Joseph Snipes	Shot 5: Increased prepuff by 2 ms to 27 ms duration. Good shot.
Aug 24 2007 10:16:52:150AM	1070824006	Joseph Snipes	Shot 6: Raised nl04 to 7 x 10^19 m^-2. Good shot.
Aug 24 2007 10:33:36:283AM	1070824007	Joseph Snipes	Shot 7: Increased RXU by 1 cm to better match the LH launcher. Increased the flattop length by 0.1 s for Steve Scott for the DNB out to 1.6 s on Ip and 1.7 s on TF. Good shot.
Aug 24 2007 10:50:11:967AM	1070824008	Joseph Snipes	Shot 8: Increased nl04 to 1 x 10^20 m^-2. Lengthened the flattop out to 1.7 s for Ip and all P's. Disrupted in rampdown at 1.91 s.
Aug 24 2007 11:11:06:700AM	1070824009	Joseph Snipes	Shot 9: Changed rampdown slightly to attempt to avoid the late disruption. Decreased prepuff to 20 ms duration. NINJA puff at 0.7 s. RCUR decreased by 2.0 mm as CLEARIN was decreased by 2 mm. Good shot.
Aug 24 2007 11:22:35:797AM	1070824010	Joseph Snipes	Shot 10: Enabled argon gas with a 70 ms puff from 0.3 to 0.37 s. Extended nl04 to 1.5 s at 1 x 10^20 m^-2. Readjusted CLEARIN and RCUR to try to flatten out the outer gap. Good shot.
Aug 24 2007 11:34:56:253AM	1070824011	Joseph Snipes	Shot 11: Raised nl04 to 1.22 x 10^20 m^-2. Increased argon pulse length to 0.1 s. Reduced prepuff by 1 ms to 19 ms duration. Decreased RCUR by 2.5 mm to increase the outer gap by 5 mm. Good shot though it disrupted in the rampdown at 1.73 s.
Aug 24 2007 11:47:32:820AM	1070824012	Joseph Snipes	Shot 12: Extended EF2_by_EF4 out to 1.7 s. Reduced RCUR by 2.5 mm to again increase the outer gap by 5 mm. Fizzle!
Aug 24 2007 12:16:55:177PM	1070824013	Joseph Snipes	Shot 13: Reduced prepuff to 17 ms duration. NINJA puff moved to 0.8 s. Good shot but disrupted in rampdown again at 1.73 s. Railing the OH1 supply.
Aug 24 2007 12:35:14:737PM	1070824014	Joseph Snipes	Shot 14: Increased current limit on OH1 to +/- 30 kA. Increased the ICRF pulse out to 1.5 s. Disrupted a bit later at 1.86 s.
Aug 24 2007 12:38:47:417PM	1070824015	Joseph Snipes	Shot 15: Reduced flattop on all P's to 1.5 s. Increased nl04 to 1.6 x 10^20 m^-2. Disrupted at 1.3 s.
Aug 24 2007 12:50:57:387PM	1070824016	Joseph Snipes	Shot 16: Reduced nl04 to 1.5 x 10^20 m^-2. Reduced prepuff by 2 ms to 15 ms duration. Fizzle!
Aug 24 2007 01:05:31:567PM	1070824017	Joseph Snipes	Shot 17: Repeat. Disrupted at 1.31 s.
Aug 24 2007 01:16:31:487PM	1070824018	Joseph Snipes	Shot 18: Reduced nl04 to 1.22 x 10^20 m^-2. Fizzle!
Aug 24 2007 01:29:19:540PM	1070824019	Joseph Snipes	Shot 19: Repeat. Good shot.
Aug 24 2007 01:42:20:670PM	1070824020	Joseph Snipes	Shot 20: Increased prepuff by 2 ms to 17 ms duration. Fizzle!
Aug 24 2007 01:56:10:190PM	1070824021	Joseph Snipes	Shot 21: Reduced prepuff by 2 ms to 15 ms duration. Good shot. Disrupted in rampdown around 1.78 s.
Aug 24 2007 02:08:17:333PM	1070824022	Joseph Snipes	Shot 22: Reduced nl04 to 1 x 10^20 m^-2. Reduced prepuff to 14 ms duration. Good shot.
Aug 24 2007 02:27:57:457PM	1070824023	Joseph Snipes	Shot 23: Reduced nl04 to 0.7 x 10^20 m^-2. Good shot.
Aug 24 2007 02:34:56:907PM	1070824024	Joseph Snipes	Shot 24: Increased RCUR by 4 mm to reduce the outer gap. Good shot.
Aug 24 2007 02:53:50:950PM	1070824025	Joseph Snipes	Shot 25: Increased RCUR by 2 mm to reduce the outer gap some more. Also increased RXU by 1 to 1.5 cm to better match the shape of the LH launcher. Good shot.
Aug 24 2007 03:14:29:467PM	1070824026	Joseph Snipes	Shot 26: Increased RCUR by 0.5 mm to reduce the outer gap a bit more. Also increased RXU to 1.0 cm to better match the shape of the LH launcher. Good shot.
Aug 24 2007 03:21:38:960PM	1070824027	Joseph Snipes	Shot 27: Increased RCUR early to try to flatten the outer gap in the current flattop to the lower value of outer gap. Reduced nl04 to 6 x 10^19 m^-2 to try to get the desired 7 x 10^19 m^-2. Good shot.
Aug 24 2007 03:34:59:430PM	1070824028	Joseph Snipes	Shot 28: Reloaded shot 26 but now with 60 degree phasing on the LH launcher. Good shot.
Aug 24 2007 03:48:58:000PM	1070824029	Joseph Snipes	Shot 29: Repeat. Good shot.
Aug 24 2007 04:06:00:223PM	1070824030	Joseph Snipes	Shot 30: Reduced nl04 to 5 x 10^19 m^-2. Good shot.
Aug 24 2007 04:20:57:730PM	1070824031	Joseph Snipes	Shot 31: Repeat. Good shot.
Aug 24 2007 04:33:36:360PM	1070824032	Joseph Snipes	Shot 32: Increased nl04 to 8 x 10^19 m^-2. LH phase changed to 105 degrees. Good shot.
Aug 24 2007 04:43:20:683PM	1070824033	Joseph Snipes	Shot 33: Changing to Miklos/Eric's program from yesterday for the last two shots. Loaded shot 1070823010. Turning on LH from 0.1 s and ICRF from 0.14 s. LH phasing set to 90 degrees. Disrupted at 0.4 s.
Aug 24 2007 04:58:42:803PM	1070824034	Joseph Snipes	Shot 34: Reduced prepuff to 14 ms duration. Fizzle.
Aug 24 2007 05:08:52:083PM	1070824035	Joseph Snipes	Shot 35: LPI enabled with a pellet after 0.5 s. Increased prepuff to 15 ms duration. Disrupted at 0.9 s. No pellet.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:00:02:797AM	Plasma	Ok
2	09:13:19:693AM	Plasma	Ok
3	09:27:01:590AM	Plasma	Ok
4	09:43:38:600AM	Plasma	Ok
5	10:01:11:330AM	Plasma	Ok
6	10:15:06:867AM	Plasma	Ok
7	10:31:48:470AM	Plasma	Ok
8	10:47:42:947AM	Plasma	Ok
9	11:06:14:397AM	Plasma	Ok
10	11:19:46:730AM	Plasma	Ok
11	11:32:41:517AM	Plasma	Ok
12	11:45:34:927AM	Plasma	Ok
13	11:58:42:510AM	Plasma	Ok
14	12:17:58:413PM	Plasma	Ok
15	12:35:49:177PM	Plasma	Ok
16	12:48:56:163PM	Plasma	Ok
17	01:01:59:450PM	Plasma	Ok
18	01:14:54:830PM	Plasma	Ok
19	01:27:20:050PM	Plasma	Ok
20	01:40:16:570PM	Plasma	Ok
21	01:53:49:733PM	Plasma	Ok
22	02:06:20:300PM	Plasma	Ok
23	02:19:21:930PM	Plasma	Ok
24	02:32:44:480PM	Plasma	Ok
25	02:50:50:650PM	Plasma	Ok
26	03:03:20:857PM	Plasma	Ok
27	03:20:01:367PM	Plasma	Ok
28	03:33:20:193PM	Plasma	Ok
29	03:47:19:970PM	Plasma	Ok
30	04:03:44:077PM	Plasma	Ok
31	04:16:18:253PM	Plasma	Ok
32	04:28:44:117PM	Plasma	Ok
33	04:41:11:527PM	Plasma	Ok
34	04:53:57:407PM	Plasma	Ok
35	05:06:11:143PM	Plasma	Ok