Alcator C-Mod Run 1070807 Information

Miniproposals

Miniproposal: 503

Date Filed: 7/12/2007

Title: Scaling of the L-H transition at low density

First Author: Joseph Snipes

Session Leader: Joseph Snipes (shots 1-34)

Operators
Session leader(s):	Joseph Snipes
Physics operator(s):	Earl Marmar
Engineering operator(s):	Bill Cochran,Bill Byford,Gary Dekow

Engineering Operator Run Comment
MP503 Scaling of the L-H Transition at Low Density SL:J. Snipes PO: Marm

Session Leader Plans

Entered: Aug 6 2007 12:56:11:963PM

Author: Joseph Snipes

Session Leader Plan for Tuesday 1070807
MP503 Scaling of the L-H Transition at Low Density

This run requires high ICRF power and reproducible wall conditions. So, we would like an overnight ECDC in helium Monday night at the usual settings.

Load shot 1070803028 to use its startup segment 1 and then load segment 2 from 1070612025 and turn on segment 2 and turn off segment 4 and then recalculate all magnetics predictors for use without F19 in segment 2. Change Ip to 0.9 MA and nl04 to 6 x 10^19 m^-2. Ramp the ICRF power from 0.5 s to 1.5 s from 0.5 MW to 2.5 MW. Then, scan the density from shot to shot from 5 to 4 to 3 x 10^19 m^-2 taking two shots at each density if necessary. Then, reduce Ip to 0.6 MA and repeat the density scan. Then, increase Ip to 1.2 MA and repeat the density scan. At the lower densities, the ICRF ramp will probably need to go up to 3.5 MW to find the H-mode threshold. The idea is to map out the density dependence of the H-mode threshold for each plasma current, particularly at low and moderate densities. If time remains after all this is done, we will repeat each current at slightly higher densities of 7 and 8 x 10^19 m^-2.

Physics Operators Plans

Entered: Aug 7 2007 09:47:02:737AM

Author: Earl Marmar

Physop and Engineering Setup for Tuesday, 1070807

MP MP503 Scaling of the L-H Transition at Low Density
Session Leader: J. Snipes
Physop: E. Marmar

Overnight ECDC in HELIUM-4

Power systems as on 1070612025
A-coil configuration: normal [Dtop -Dbot -Jtop +Jbot] and enabled.

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

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

Torvac setup: Gate valves open during pulse.

ICRF: D E and J-port ready at the beginning of run
Ramp the ICRF power between 0.5 s to 1.5 s from 0.5 MW to 2.5 MW.
LH: Not needed
CRYOPUMP: Ready for operation on the first shot

Plan: Start with 900kA, LSN. Scan the density from shot to shot, starting at nl_04=6e19 m^-2, then go down to 4e19 and then 3e19, taking two shots at each density if necessary. Then, reduce Ip to 0.6 MA and repeat the density scan. Then, increase Ip to 1.2 MA and repeat the density scan. At the lower densities, the ICRF ramp will probably need to go up to 3.5 MW to find the H-mode threshold. The idea is to map out the density dependence of the H-mode threshold for each plasma current, particularly at low and moderate densities. If time remains after all this is done, we will repeat each current at slightly higher densities of 7 and 8 x 10^19 m^-2.

Session Leader Summaries

Entered: Aug 7 2007 05:48:08:730PM

Author: Joseph Snipes

The run started late because of software problems with the machine cooling so that we did not get the first shot until 10:00 am. There were a number of disruptions and 11 fizzles so that we ended up with only 11 good shots with clear L-H transitions. This meant that we had very little time to explore all of the densities and currents that we wanted to run and no time to check for reproducibility of any condition. Nonetheless, we did manage to get L-H threshold points for several densities at 0.6 MA, 0.9 MA, and 1.2 MA. This gave a fairly clear result that the minimum density for the threshold around nebar = 1 x 10^20 m^-3, which is somewhat higher than previous results that were around 8 x 10^19 m^-3. Because we did not boronize, there were certainly rather high moly radiation levels for all of the shots, so that might explain why the low density limit is somewhat higher than previously. There appears to be no current dependence to the low density limit in that all three currents more or less overlayed each other in (Ptot - dW/dt)/Pscaling vs nebar. Plotting the same relative threshold power vs n/n_G clearly separated out the low current points indicating that there was no clear dependence on the Greenwald density limit. The experiment should be repeated with a good boronization and perhaps with between-shot boronization to determine if reduced moly radiation would change the result at all.

Physics Operator Summaries

Entered: Aug 22 2007 01:53:05:323PM

Author: Earl Marmar

After a delayed start (RSView server problem delayed cooling), engineering systems worked well for most of the day.

We had significant problems with fizzles today. Playing with fill did not seem to help much. Shot 23 fizzled because the cryopump stopped pumping deuterium just before the shot.

We ended the day with 4 beam into gas (no fields) for MSE.

Summary:
plasmas 18
fizzles 12
beam into gas 4

total cycles 34

Session Leader Comments

Aug 7 2007 08:31:38:320AM 1070807001 Joseph Snipes Delay for cooling because the RSView software failed last night. We expect to start around 10:00 am.

Aug 7 2007 10:32:20:337AM 1070807001 Joseph Snipes Shot 1: Good shot. Lost core Thomson data due to a computer problem. Cell access to reboot the Thomson computer. First L-H transition right at 0.86 s.

Aug 7 2007 10:33:11:553AM 1070807002 Joseph Snipes Shot 2: Runaways early. Disrupted at 0.26 s.

Aug 7 2007 11:13:33:930AM 1070807004 Joseph Snipes Shot 4: Good shot. First H-mode transition at 0.836 s.

Aug 7 2007 11:24:03:247AM 1070807005 Joseph Snipes Shot 5: Reducing nl04 to 5 x 10^19 m^-2. Good shot. First L-H transition at 0.605 s.

Aug 7 2007 11:36:25:610AM 1070807006 Joseph Snipes Shot 6: Good shot. nl04 reduced to 4 x 10^19 m^-2. First L-H transition at 0.988 s.

Aug 7 2007 11:48:25:940AM 1070807007 Joseph Snipes Shot 7: nl04 reduced to 3 x 10^19 m^-2. Early runaways and disruption at 0.27 s.

Aug 7 2007 12:13:13:157PM 1070807008 Joseph Snipes Shot 8: Good shot. First L-H transition at 1.24 s. Gas evolving off of the RF
raised the density above the requested value.

Aug 7 2007 12:20:47:603PM 1070807009 Joseph Snipes Shot 9: Dithering very late nearly in H-mode at 3 MW. Need to repeat with higher power.

Aug 7 2007 12:30:11:897PM 1070807010 Joseph Snipes Shot 10: Fizzle!

Aug 7 2007 01:08:44:283PM 1070807012 Joseph Snipes Shot 12: Disrupted violently at 0.86 s with only 2 MW of ICRF.

Aug 7 2007 01:09:35:800PM 1070807013 Joseph Snipes Shot 13: Go to 0.6 MA and 0.6 x 10^20 m^-2. Fizzle!

Aug 7 2007 01:48:54:707PM 1070807015 Joseph Snipes Shot 15: Fizzle again.

Aug 7 2007 02:02:36:457PM 1070807016 Joseph Snipes Shot 16: Good shot. Brief H-mode with the L-H transition at 0.77 s

Aug 7 2007 02:20:19:040PM 1070807017 Joseph Snipes Shot 17: Reduce nl04 to 5 x 10^19 m^-2. Good shot. L-H transition at 1.15 s.

Aug 7 2007 03:38:56:113PM 1070807018 Joseph Snipes Shot 18: Reduce nl04 to 4 x 10^19 m^-2. Good shot. Marginal L-H transition at 0.99 s that does not really appear to be an L-H transition on the edge Te.

Aug 7 2007 02:48:32:557PM 1070807019 Joseph Snipes Shot 19: Disrupted at 0.94 s. No H-modes.

Aug 7 2007 03:07:29:467PM 1070807020 Joseph Snipes Shot 20: Go to 1.2 MA and nl04 of 7 x 10^19 m^-2. Disrupted at 0.44 s due to a programming error by the physop.

Aug 7 2007 03:12:03:113PM 1070807021 Joseph Snipes Shot 21: Try again at nl04 = 7 x 10^19 m^-2. Fizzle!

Aug 7 2007 03:55:42:070PM 1070807024 Joseph Snipes Shot 24: Finally got a plasma back. Ohmic H-mode after long dithering with up to 2 MW of ICRF. Ohmic L-H transition at 1.45 s.

Aug 7 2007 04:18:54:063PM 1070807025 Joseph Snipes Shot 25: nl04 set to 6 x 10^19 m^-2. Good shot. Disrupted after a Li pellet at 1.72 s. Dithering H-modes throughout the shot with the first transition at 0.54 s.

Aug 7 2007 04:21:04:960PM 1070807026 Joseph Snipes Shot 26: nl04 set to 5 x 10^19 m^-2. Good shot. Disrupted at 1.45 s. Dithering H-modes throughout the shot with the first transition at 0.778 s.

Aug 7 2007 04:31:37:957PM 1070807027 Joseph Snipes Shot 27: Set nl04 = 0.7 x 10^20 m^-2 and Ip = 0.9 MA. Fizzle!

Aug 7 2007 04:57:36:953PM 1070807029 Joseph Snipes Shot 29: Fizzle again.

Aug 7 2007 05:10:35:673PM 1070807030 Joseph Snipes Shot 30: Try going to 0.6 MA and nl04 = 7 x 10^19 m^-2. Good shot. Several H-modes with the first L-H transition at 0.648 s.

Aug 7 2007 05:30:25:443PM 1070807031 Steve Scott New experiment: beam-into-gas, NO FIELDS. Measure spectrum from beam thru MSE optics, to determine
the Doppler shift and thereby infer the angle between the MSE sightline and the DNB.

This will be a repeat of shot 1070803032. torus pressure about 3.0 mTorr (D2).

First two shots will have the MSE linear polarizer left in situ (while we wait for oxygen to return
to the test cell).

Result: good dnb. got the same gas puff as 1070803032, except we got
a little extra gas (up to an additional 0.5 mTorr) starting at
0.7 sec.

Overall, this is an acceptable member of the scan.

next: repeat but withoout the extra Ninja puff ...

Note: we got a DNB pulse in excess of the nominal maximum of 1.50 sec.
Need to check with Dexter about why the controls allowed this. We had
defined a maximum 'on' time of 1400 ms, but the controls seemed to pay
more attention to the defined on/off time.

Aug 7 2007 05:36:00:420PM 1070807032 Steve Scott good gas but DNB faulted at 1.37 sec.

Aug 7 2007 05:42:36:367PM 1070807033 Steve Scott This is the last dnb-into-gas shot with the MSE linear polarizer left in place.
Result: DNB is correct duration, but suffered one fault. Overall, this is
acceptable. Good gas pulse.

Aug 7 2007 05:52:03:970PM 1070807034 Steve Scott Prior to this shot, we removed the linear polarizer from MSE. We expect the signal strength to the
spectrometer to increase by a factor 2 - 2.5

result: good dnb, good gas.

This is the final shot of this micro-expermient.

Physics Operator Comments

Aug 7 2007 10:24:04:577AM 1070807001 Earl Marmar computer problem (RSView server) delayed cooling 1 hour

set up for first shot
load from 1070803028
import segment 2 from 1070612025 into segment 2
turn on segment 2, turn off segment 4
recall all magnetics that used f19
Ip to 0.9 MA
nl_04 to 6e19
argon puff to 50 msec (from 100)

cryopump is cold (liquid He temp)
no DNB (conditioning)

plasma
early hards; small bounce
density looks good;
multiple h-modes

problem with TF bus Rogowski

Aug 7 2007 10:49:18:683AM 1070807002 Earl Marmar cell access before shot 2 for Thomson scattering computer problem

no pcs changes

plasma
lots of hards, early disruption
P_fill (ratiomatic) = 0.034 mTorr

TF bus rogowski integrator still having trouble

Aug 7 2007 10:48:20:523AM 1070807003 Earl Marmar prefill puff to 50 msec (from 37)

fizzle
P_fill (ratiomatic) = 0.047 mTorr

Aug 7 2007 11:15:42:353AM 1070807004 Earl Marmar prefill puff to 45 msec (from 50)

plasma
P_fill = 0.042 mTorr
early hards are reduced
multiple h-modes

TF rogowski looks ok

Aug 7 2007 11:26:12:440AM 1070807005 Earl Marmar nl_04 target to 5e19

plasma
some early hards
multiple h-modes

Aug 7 2007 11:38:49:640AM 1070807006 Earl Marmar prefill puff to 47 msec (from 45)
nl_04 target to 4e19

plasma
early hards about the same
h-modes

Aug 7 2007 11:50:45:037AM 1070807007 Earl Marmar nl_04 target to 3e19

plasma
more runaways
early disruption

Aug 7 2007 12:08:07:730PM 1070807008 Earl Marmar no pcs changes

plasma
early hards gone, then hards rising through the shot
late h-mode

Aug 7 2007 12:35:07:043PM 1070807009 Earl Marmar slight change to early nl_04 target, still trying for 3e19
TF flattop to 1.5

plasma
density is rising during RF
no h-mode
disrupt early in rampdown

Aug 7 2007 12:34:26:527PM 1070807010 Earl Marmar no pcs changes

fizzle

Aug 7 2007 12:52:29:233PM 1070807011 Earl Marmar prefill puff to 45 msec (from 47)

fizzle

Aug 7 2007 01:08:18:500PM 1070807012 Earl Marmar EF4 15 A more negative prior to t=0

plasma
got the low density
hot L-mode (>5 keV at tops of sawteeth)
h_89 ~ 1.5
h_98 ~ 1.4
possible locked mode
disrupt at 0.88 seconds

Aug 7 2007 01:10:28:863PM 1070807013 Earl Marmar Ip to .6 MA
nl_04 to 6e19

fizzle

Aug 7 2007 01:26:35:290PM 1070807014 Earl Marmar prefill puff to 44 msec (from 45)

fizzle

Aug 7 2007 01:56:42:807PM 1070807015 Earl Marmar no pcs changes

cycle problems
no-power cycle, shot # did not increment.

Plasma attempt
fizzle

Aug 7 2007 02:14:13:110PM 1070807016 Earl Marmar EF4 back to -1335A
BR_0 offset to -.004 (from -.0035)

prefill puff to 42 msec (from 44 msec)

plasma
short h-mode

Aug 7 2007 02:22:17:430PM 1070807017 Earl Marmar nl_04 to 5e19
extend TF flattop to 2.0 s(for OH double swing)
change OH and TF invert times to 2.4 s
fizzle off to 2.1 seconds

plasma
one h-mode

Aug 7 2007 02:37:51:120PM 1070807018 Earl Marmar nl_04 to 4e19

plasma
might be a brief h-mode just before it disrupts at 1.05 s)

Aug 7 2007 02:49:45:760PM 1070807019 Earl Marmar prefill puff to 41 msec (from 42)

plasma
disrupt 0.94 seconds
no obvious h-mode

Aug 7 2007 03:02:00:290PM 1070807020 Earl Marmar Ip to 1.2 MA
intended nl_04 target to 7e19
but it was actually 4e19

plasma

early disruption (1 MA)

Aug 7 2007 03:16:08:180PM 1070807021 Earl Marmar nl_04 target to 7e19 (really)

fizzle

Aug 7 2007 03:28:43:163PM 1070807022 Earl Marmar prefill puff to 39 msec (from 41)

fizzle

Aug 7 2007 03:43:25:370PM 1070807023 Earl Marmar prefill puff to 38 msec (from 39)

fizzle
fill pressure was 0.07 mTorr; looks like the cryopump stopped pumping just before the shot

Aug 7 2007 03:59:07:183PM 1070807024 Earl Marmar prefill puff to 38 msec (from 39)

plasma
ohmic h-mode near end of flattop

Aug 7 2007 04:07:45:240PM 1070807025 Earl Marmar prefill puff to 39 msec (from 38)
nl_04 target to 6e19

plasma
no obvious h-mode
Li pellet then disrupt (in ramp-down)

Aug 7 2007 05:01:14:753PM 1070807026 Earl Marmar nl_04 target to 5e19

plasma
disrupt at 1.45 s

Aug 7 2007 04:38:47:680PM 1070807027 Earl Marmar prefill puff to 36 msec (from 39)

nl_04 target to 7e19
Ip to 0.9 MA

fizzle

Aug 7 2007 04:48:51:727PM 1070807028 Earl Marmar prefill puff to 34 msec (from 36)

fizzle

Aug 7 2007 05:03:47:180PM 1070807029 Earl Marmar BR_0 offset to -.0035 (from -.004)

fizzle

Aug 7 2007 05:12:26:877PM 1070807030 Earl Marmar prefill puff to 32 msec (from 34)
Ip to 600 kA
nl_04 still set to 7e19

plasma
several h-modes

Aug 7 2007 05:16:38:787PM 1070807031 Earl Marmar load from 1070803032

deuterium gas puff for DNB into gas MSE tests

Aug 7 2007 05:34:49:217PM 1070807032 Earl Marmar repeat

deuterium gas puff for DNB into gas MSE tests

Aug 7 2007 05:41:25:740PM 1070807033 Earl Marmar repeat

deuterium gas puff for DNB into gas MSE tests

Aug 7 2007 05:51:40:657PM 1070807034 Earl Marmar repeat

deuterium gas puff for DNB into gas MSE tests

Engineering Operator Comments

Shot Time Type Status Comment

1 10:00:33:063AM Plasma Ok

2 10:31:04:443AM Plasma Ok

3 10:44:14:553AM Plasma Ok

4 11:04:19:543AM Plasma Ok

5 11:17:45:980AM Plasma Ok

6 11:30:58:830AM Plasma Ok

7 11:46:11:237AM Plasma Ok

8 12:01:40:643PM Plasma Ok

9 12:14:57:223PM Plasma Ok

10 12:27:52:627PM Plasma Ok

11 12:41:50:160PM Plasma Ok

12 12:55:10:817PM Plasma Ok

13 01:07:44:533PM Plasma Ok

14 01:20:43:563PM Plasma Ok

15 01:47:03:687PM Plasma Ok

16 01:59:56:577PM Plasma Ok

17 02:14:05:267PM Plasma Ok

18 02:26:38:357PM Plasma Ok

19 02:42:35:970PM Plasma Ok

20 02:56:45:347PM Plasma Ok

21 03:10:06:487PM Plasma Ok

22 03:23:31:360PM Plasma Ok

23 03:36:02:190PM Plasma Ok

24 03:49:14:907PM Plasma Ok

25 04:01:58:263PM Plasma Ok

26 04:16:11:127PM Plasma Ok

27 04:29:24:720PM Plasma Ok

28 04:42:08:373PM Plasma Ok

29 04:54:38:107PM Plasma Ok

30 05:07:16:903PM Plasma Ok

31 05:20:09:057PM Test Ok MSE Calibration

32 05:30:25:943PM Test Ok MSE Calibration

33 05:39:34:847PM Test Ok MSE Calibration

34 05:48:27:153PM Test Ok MSE Calibration

System Availability

Aug 7 2007 10:00:08:703AM

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 Only high frequency channels now working (17 to 32). Ch 22 has bad video amp. LO is OK. Problem looks to be in mixer amp unit. Jul 11 2007 10:52AM (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 50, 60, 75 88, 88l and 88u are operational. 60GHz is a little noisy. Variable frequency channel has just been modified (on 1070731) and is being tested. 110GHz is not working. Aug 07 2007 08:34AM (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, 10 spatial channels. Density is calibrated based on ECE cutoffs obtained on 4 May 2007. Additional spatial channels will be added over the next several weeks. Jul 11 2007 09:18AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes,yma
TS - Edge yes 2 lasers, 20 spatial channels. Fiber holder position is -110.0mm. Density is calibrated according to Raman scattering results from 26 May, supplemented with ECE cutoffs obtained on shot 1070531015. Aug 02 2007 05:52PM (yma) 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 7 2007 10:30:45:363AM

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 Only high frequency channels now working (17 to 32). Ch 22 has bad video amp. LO is OK. Problem looks to be in mixer amp unit. Jul 11 2007 10:52AM (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 50, 60, 75 88, 88l and 88u are operational. 60GHz is a little noisy. Variable frequency channel has just been modified (on 1070731) and is being tested. 110GHz is not working. Aug 07 2007 08:34AM (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 7 2007 08:31:38:320AM	1070807001	Joseph Snipes	Delay for cooling because the RSView software failed last night. We expect to start around 10:00 am.
Aug 7 2007 10:32:20:337AM	1070807001	Joseph Snipes	Shot 1: Good shot. Lost core Thomson data due to a computer problem. Cell access to reboot the Thomson computer. First L-H transition right at 0.86 s.
Aug 7 2007 10:33:11:553AM	1070807002	Joseph Snipes	Shot 2: Runaways early. Disrupted at 0.26 s.
Aug 7 2007 11:13:33:930AM	1070807004	Joseph Snipes	Shot 4: Good shot. First H-mode transition at 0.836 s.
Aug 7 2007 11:24:03:247AM	1070807005	Joseph Snipes	Shot 5: Reducing nl04 to 5 x 10^19 m^-2. Good shot. First L-H transition at 0.605 s.
Aug 7 2007 11:36:25:610AM	1070807006	Joseph Snipes	Shot 6: Good shot. nl04 reduced to 4 x 10^19 m^-2. First L-H transition at 0.988 s.
Aug 7 2007 11:48:25:940AM	1070807007	Joseph Snipes	Shot 7: nl04 reduced to 3 x 10^19 m^-2. Early runaways and disruption at 0.27 s.
Aug 7 2007 12:13:13:157PM	1070807008	Joseph Snipes	Shot 8: Good shot. First L-H transition at 1.24 s. Gas evolving off of the RF raised the density above the requested value.
Aug 7 2007 12:20:47:603PM	1070807009	Joseph Snipes	Shot 9: Dithering very late nearly in H-mode at 3 MW. Need to repeat with higher power.
Aug 7 2007 12:30:11:897PM	1070807010	Joseph Snipes	Shot 10: Fizzle!
Aug 7 2007 01:08:44:283PM	1070807012	Joseph Snipes	Shot 12: Disrupted violently at 0.86 s with only 2 MW of ICRF.
Aug 7 2007 01:09:35:800PM	1070807013	Joseph Snipes	Shot 13: Go to 0.6 MA and 0.6 x 10^20 m^-2. Fizzle!
Aug 7 2007 01:48:54:707PM	1070807015	Joseph Snipes	Shot 15: Fizzle again.
Aug 7 2007 02:02:36:457PM	1070807016	Joseph Snipes	Shot 16: Good shot. Brief H-mode with the L-H transition at 0.77 s
Aug 7 2007 02:20:19:040PM	1070807017	Joseph Snipes	Shot 17: Reduce nl04 to 5 x 10^19 m^-2. Good shot. L-H transition at 1.15 s.
Aug 7 2007 03:38:56:113PM	1070807018	Joseph Snipes	Shot 18: Reduce nl04 to 4 x 10^19 m^-2. Good shot. Marginal L-H transition at 0.99 s that does not really appear to be an L-H transition on the edge Te.
Aug 7 2007 02:48:32:557PM	1070807019	Joseph Snipes	Shot 19: Disrupted at 0.94 s. No H-modes.
Aug 7 2007 03:07:29:467PM	1070807020	Joseph Snipes	Shot 20: Go to 1.2 MA and nl04 of 7 x 10^19 m^-2. Disrupted at 0.44 s due to a programming error by the physop.
Aug 7 2007 03:12:03:113PM	1070807021	Joseph Snipes	Shot 21: Try again at nl04 = 7 x 10^19 m^-2. Fizzle!
Aug 7 2007 03:55:42:070PM	1070807024	Joseph Snipes	Shot 24: Finally got a plasma back. Ohmic H-mode after long dithering with up to 2 MW of ICRF. Ohmic L-H transition at 1.45 s.
Aug 7 2007 04:18:54:063PM	1070807025	Joseph Snipes	Shot 25: nl04 set to 6 x 10^19 m^-2. Good shot. Disrupted after a Li pellet at 1.72 s. Dithering H-modes throughout the shot with the first transition at 0.54 s.
Aug 7 2007 04:21:04:960PM	1070807026	Joseph Snipes	Shot 26: nl04 set to 5 x 10^19 m^-2. Good shot. Disrupted at 1.45 s. Dithering H-modes throughout the shot with the first transition at 0.778 s.
Aug 7 2007 04:31:37:957PM	1070807027	Joseph Snipes	Shot 27: Set nl04 = 0.7 x 10^20 m^-2 and Ip = 0.9 MA. Fizzle!
Aug 7 2007 04:57:36:953PM	1070807029	Joseph Snipes	Shot 29: Fizzle again.
Aug 7 2007 05:10:35:673PM	1070807030	Joseph Snipes	Shot 30: Try going to 0.6 MA and nl04 = 7 x 10^19 m^-2. Good shot. Several H-modes with the first L-H transition at 0.648 s.
Aug 7 2007 05:30:25:443PM	1070807031	Steve Scott	New experiment: beam-into-gas, NO FIELDS. Measure spectrum from beam thru MSE optics, to determine the Doppler shift and thereby infer the angle between the MSE sightline and the DNB. This will be a repeat of shot 1070803032. torus pressure about 3.0 mTorr (D2). First two shots will have the MSE linear polarizer left in situ (while we wait for oxygen to return to the test cell). Result: good dnb. got the same gas puff as 1070803032, except we got a little extra gas (up to an additional 0.5 mTorr) starting at 0.7 sec. Overall, this is an acceptable member of the scan. next: repeat but withoout the extra Ninja puff ... Note: we got a DNB pulse in excess of the nominal maximum of 1.50 sec. Need to check with Dexter about why the controls allowed this. We had defined a maximum 'on' time of 1400 ms, but the controls seemed to pay more attention to the defined on/off time.
Aug 7 2007 05:36:00:420PM	1070807032	Steve Scott	good gas but DNB faulted at 1.37 sec.
Aug 7 2007 05:42:36:367PM	1070807033	Steve Scott	This is the last dnb-into-gas shot with the MSE linear polarizer left in place. Result: DNB is correct duration, but suffered one fault. Overall, this is acceptable. Good gas pulse.
Aug 7 2007 05:52:03:970PM	1070807034	Steve Scott	Prior to this shot, we removed the linear polarizer from MSE. We expect the signal strength to the spectrometer to increase by a factor 2 - 2.5 result: good dnb, good gas. This is the final shot of this micro-expermient.

Physics Operator Comments
Aug 7 2007 10:24:04:577AM	1070807001	Earl Marmar	computer problem (RSView server) delayed cooling 1 hour set up for first shot load from 1070803028 import segment 2 from 1070612025 into segment 2 turn on segment 2, turn off segment 4 recall all magnetics that used f19 Ip to 0.9 MA nl_04 to 6e19 argon puff to 50 msec (from 100) cryopump is cold (liquid He temp) no DNB (conditioning) plasma early hards; small bounce density looks good; multiple h-modes problem with TF bus Rogowski
Aug 7 2007 10:49:18:683AM	1070807002	Earl Marmar	cell access before shot 2 for Thomson scattering computer problem no pcs changes plasma lots of hards, early disruption P_fill (ratiomatic) = 0.034 mTorr TF bus rogowski integrator still having trouble
Aug 7 2007 10:48:20:523AM	1070807003	Earl Marmar	prefill puff to 50 msec (from 37) fizzle P_fill (ratiomatic) = 0.047 mTorr
Aug 7 2007 11:15:42:353AM	1070807004	Earl Marmar	prefill puff to 45 msec (from 50) plasma P_fill = 0.042 mTorr early hards are reduced multiple h-modes TF rogowski looks ok
Aug 7 2007 11:26:12:440AM	1070807005	Earl Marmar	nl_04 target to 5e19 plasma some early hards multiple h-modes
Aug 7 2007 11:38:49:640AM	1070807006	Earl Marmar	prefill puff to 47 msec (from 45) nl_04 target to 4e19 plasma early hards about the same h-modes
Aug 7 2007 11:50:45:037AM	1070807007	Earl Marmar	nl_04 target to 3e19 plasma more runaways early disruption
Aug 7 2007 12:08:07:730PM	1070807008	Earl Marmar	no pcs changes plasma early hards gone, then hards rising through the shot late h-mode
Aug 7 2007 12:35:07:043PM	1070807009	Earl Marmar	slight change to early nl_04 target, still trying for 3e19 TF flattop to 1.5 plasma density is rising during RF no h-mode disrupt early in rampdown
Aug 7 2007 12:34:26:527PM	1070807010	Earl Marmar	no pcs changes fizzle
Aug 7 2007 12:52:29:233PM	1070807011	Earl Marmar	prefill puff to 45 msec (from 47) fizzle
Aug 7 2007 01:08:18:500PM	1070807012	Earl Marmar	EF4 15 A more negative prior to t=0 plasma got the low density hot L-mode (>5 keV at tops of sawteeth) h_89 ~ 1.5 h_98 ~ 1.4 possible locked mode disrupt at 0.88 seconds
Aug 7 2007 01:10:28:863PM	1070807013	Earl Marmar	Ip to .6 MA nl_04 to 6e19 fizzle
Aug 7 2007 01:26:35:290PM	1070807014	Earl Marmar	prefill puff to 44 msec (from 45) fizzle
Aug 7 2007 01:56:42:807PM	1070807015	Earl Marmar	no pcs changes cycle problems no-power cycle, shot # did not increment. Plasma attempt fizzle
Aug 7 2007 02:14:13:110PM	1070807016	Earl Marmar	EF4 back to -1335A BR_0 offset to -.004 (from -.0035) prefill puff to 42 msec (from 44 msec) plasma short h-mode
Aug 7 2007 02:22:17:430PM	1070807017	Earl Marmar	nl_04 to 5e19 extend TF flattop to 2.0 s(for OH double swing) change OH and TF invert times to 2.4 s fizzle off to 2.1 seconds plasma one h-mode
Aug 7 2007 02:37:51:120PM	1070807018	Earl Marmar	nl_04 to 4e19 plasma might be a brief h-mode just before it disrupts at 1.05 s)
Aug 7 2007 02:49:45:760PM	1070807019	Earl Marmar	prefill puff to 41 msec (from 42) plasma disrupt 0.94 seconds no obvious h-mode
Aug 7 2007 03:02:00:290PM	1070807020	Earl Marmar	Ip to 1.2 MA intended nl_04 target to 7e19 but it was actually 4e19 plasma early disruption (1 MA)
Aug 7 2007 03:16:08:180PM	1070807021	Earl Marmar	nl_04 target to 7e19 (really) fizzle
Aug 7 2007 03:28:43:163PM	1070807022	Earl Marmar	prefill puff to 39 msec (from 41) fizzle
Aug 7 2007 03:43:25:370PM	1070807023	Earl Marmar	prefill puff to 38 msec (from 39) fizzle fill pressure was 0.07 mTorr; looks like the cryopump stopped pumping just before the shot
Aug 7 2007 03:59:07:183PM	1070807024	Earl Marmar	prefill puff to 38 msec (from 39) plasma ohmic h-mode near end of flattop
Aug 7 2007 04:07:45:240PM	1070807025	Earl Marmar	prefill puff to 39 msec (from 38) nl_04 target to 6e19 plasma no obvious h-mode Li pellet then disrupt (in ramp-down)
Aug 7 2007 05:01:14:753PM	1070807026	Earl Marmar	nl_04 target to 5e19 plasma disrupt at 1.45 s
Aug 7 2007 04:38:47:680PM	1070807027	Earl Marmar	prefill puff to 36 msec (from 39) nl_04 target to 7e19 Ip to 0.9 MA fizzle
Aug 7 2007 04:48:51:727PM	1070807028	Earl Marmar	prefill puff to 34 msec (from 36) fizzle
Aug 7 2007 05:03:47:180PM	1070807029	Earl Marmar	BR_0 offset to -.0035 (from -.004) fizzle
Aug 7 2007 05:12:26:877PM	1070807030	Earl Marmar	prefill puff to 32 msec (from 34) Ip to 600 kA nl_04 still set to 7e19 plasma several h-modes
Aug 7 2007 05:16:38:787PM	1070807031	Earl Marmar	load from 1070803032 deuterium gas puff for DNB into gas MSE tests
Aug 7 2007 05:34:49:217PM	1070807032	Earl Marmar	repeat deuterium gas puff for DNB into gas MSE tests
Aug 7 2007 05:41:25:740PM	1070807033	Earl Marmar	repeat deuterium gas puff for DNB into gas MSE tests
Aug 7 2007 05:51:40:657PM	1070807034	Earl Marmar	repeat deuterium gas puff for DNB into gas MSE tests

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	10:00:33:063AM	Plasma	Ok
2	10:31:04:443AM	Plasma	Ok
3	10:44:14:553AM	Plasma	Ok
4	11:04:19:543AM	Plasma	Ok
5	11:17:45:980AM	Plasma	Ok
6	11:30:58:830AM	Plasma	Ok
7	11:46:11:237AM	Plasma	Ok
8	12:01:40:643PM	Plasma	Ok
9	12:14:57:223PM	Plasma	Ok
10	12:27:52:627PM	Plasma	Ok
11	12:41:50:160PM	Plasma	Ok
12	12:55:10:817PM	Plasma	Ok
13	01:07:44:533PM	Plasma	Ok
14	01:20:43:563PM	Plasma	Ok
15	01:47:03:687PM	Plasma	Ok
16	01:59:56:577PM	Plasma	Ok
17	02:14:05:267PM	Plasma	Ok
18	02:26:38:357PM	Plasma	Ok
19	02:42:35:970PM	Plasma	Ok
20	02:56:45:347PM	Plasma	Ok
21	03:10:06:487PM	Plasma	Ok
22	03:23:31:360PM	Plasma	Ok
23	03:36:02:190PM	Plasma	Ok
24	03:49:14:907PM	Plasma	Ok
25	04:01:58:263PM	Plasma	Ok
26	04:16:11:127PM	Plasma	Ok
27	04:29:24:720PM	Plasma	Ok
28	04:42:08:373PM	Plasma	Ok
29	04:54:38:107PM	Plasma	Ok
30	05:07:16:903PM	Plasma	Ok
31	05:20:09:057PM	Test	Ok	MSE Calibration
32	05:30:25:943PM	Test	Ok	MSE Calibration
33	05:39:34:847PM	Test	Ok	MSE Calibration
34	05:48:27:153PM	Test	Ok	MSE Calibration