Alcator C-Mod Run 1070516 Information

Miniproposals

Miniproposal: 482

Date Filed: 4/27/2007

Title: CXRS Diagnostic Development

First Author: Rachael Mcdermott

Session Leader: Dennis Whyte (shots 1-29)

Operators
Session leader(s):	Dennis Whyte
Physics operator(s):	Jim Irby,Steve Wolfe,Jim Irby
Engineering operator(s):	Bill Cochran,Sam Pierson,Ed Fitzgerald

Engineering Operator Run Comment
mp482

Session Leader Plans

Entered: May 15 2007 08:06:49:120PM

Author: Rachael Mcdermott

Session Leader Plan for Wednesday, May 16 2007

MP # 482 Pedestal CXRS Diagnostic Development

Purpose:
The purpose of this mini-proposal is to develop better methods of background subtraction in order to improve our capability of making reliable temperature, density, and velocity meansurements via charge exchange recombination spectroscopy.

Preparation:

Recently boronized machine
enough RF power to produce sustainable H-mode 2-3MW
80MHz 0.5-1s pulses beginning at .75-1s

Diagnostics:
All CX diagnostics, Edge and Core TS, ECE, edge probes for early L-mode periods only, bolometry, Hirex and its various relations.

Enable the following gate valves and shutters:
ECE, VUV, Z-bolo shutters; DNB gatevalve
Allow low level Argon puff(1 psi 100ms) early in shot (0.3s) from shot 1

No Lower Hybrid
No pellet injection (sorry Brock)

T=5.4T (forward field)
I=800ka-1Ma
Working Gas D2
Density: nl_04 = 0.8-1.2 *10^20 m^-2
LSN plasmas, use 1050823002 as reference equilibria

Shot Sequence:
1) No DNB, nl04=0.8x1020 m-2, RF power ramp 1-3MW to find power threshold
2) No DNB, nl04=0.8x1020 m-2 with power at least 1MW above the threshold.
Long pulse DNB, 6-6.5A, extending 100ms before and after the RF pulse nl04=0.8x1020 m-2 (See Figure 2)
3) Chopped DNB 20ms on and off, nl04=0.8x1020 m-2 (See Figure 4.)
Phase Shifted chopped DNB 12ms on and off, nl04=0.8x1020 m-2
4) Third shot time allowing with chopped DNB timing to be decided possibly shifted to capture more of the LH transition

5-8) Repeat above procedure for nl_04-1.2*10^20 m^-2

Gap Scans:
9-10) No DNB, RF power at least 1MW above threshold power, Nl04=1.2*1020 m-2
Gap scan 1.5cm -0.5cm during H-mode, 2 shots

Physics Operators Plans

Entered: May 15 2007 09:32:56:007AM

Author: Jim Irby

Physics Operator Plan for Wednesday, May 16, 2007

MP#482 Pedestal CXRS Diagnostic Development

SL: R. McDermott
PO: Irby

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

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

Power systems as on 1050823002

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)
pump out NINJA and backfill with 8 PSI of D2, then disable.

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

Torvac setup: Pumpstack gatevalves OPEN
RGA's on

We need enough ICRF to produce a sustained H-Mode (approx 3 MW)
ICRF: FMIT#1,2 in RUN-ON by 06:45
ICRF: FMIT#3,4 in RUN-ON by 06:45

LH: None

Session Leader Summaries

Entered: May 16 2007 05:12:53:543PM

Author: Dennis Whyte

A successful day. We completed the MP for
CXRS background subtraction calibrations.

The boronization seems to have held since we were
able to get steady H-modes through most of the day, with
the exception of the USN H-modes at the end of the day.

Physics Operator Summaries

Entered: May 17 2007 07:33:53:647AM

Author: Jim Irby

I loaded the startup from 1070511036 and all was well until shot 14. We again began the afternoon fizzle sequence of a fizzle or two followed by a plasma. Before shot 24 we did 10 minutes of ECDC in helium at 5e-5 Torr. This process seemed to fix the problem and we then had 5 plasmas in a row. We have had good results using ECDC in D2 previously to end the fizzle cycle, but helium has the advantage of being pumped out quickly. The last shot was lost to a data system problem.

disruptions 07
fizzles 14,16,17,19,20,22,23
plasmas 01,02,03,04,05,06,07,08,09,10
11,12,13,15,18,21,24,25,26,27
28

data system problem on 29 --- no power shot

Session Leader Comments

May 16 2007 09:56:22:010AM 1070516001 Dennis Whyte No H-mode. RF (J-ant) had many trips.
Strange density pump out at onset of RF.
Huge Fe injection at 0.3 s.
Inner gap is 1 cm as compared to 1.5 in fiducial
shot 1050823002.

May 16 2007 10:24:25:240AM 1070516002 Dennis Whyte H-mode,at PRF ~ 1.5 MW.

but RF started to trip out just after
the transition. As a result the H-mode was not very constant.
Mo and Prad jump around a bit with the RF but
overall look steady.

Have decided we'll get likely get reliable and
repeatable H-mode with P_Rf = 2 MW steady.
Hopefully the lower power input will also lengthen
the utility of the BZN.

Chromex has views of top of outer divertor shelf.
Will monitor for Mo I. No Mo I present at this point.

May 16 2007 10:19:45:223AM 1070516003 Dennis Whyte 2 MW RF starting at 0.75 seconds.
L-H transition looks good, with
steady H-mode by ~ 1 s.

Looks like a good fiducial with
steady L-H transition and H-mode density
steady after ~250 ms. This will be adequate
for the CXRS background studies.

What looks liks an antennae injection of Ni/Mo simultnaeously
with the RF drop out and back transition
at 1.15 s. Mcpherson shows steady
Cu light during H-mode/RF phases.

May 16 2007 10:54:28:563AM 1070516004 Dennis Whyte Constant RF at 2 MW from 0.75 to 1.5 s
Good L-H transitions and steady H-mode with constant
Prad.
but a small impurity injection 1.09 s kicked
down stored energy.

The DNB was on at 5 A from 0.5 to 1.75, but
the intensity increment was very weak on CXRS.
This turns out to be consistent with post-BZN
results from last weak. So it appears there
is not enough signal strength to utilize the
constant beam on constant for analysis and we're
switching to the beam blips.

May 16 2007 11:07:03:320AM 1070516005 Dennis Whyte constant H-mode at 2 MW Rf, with a few
Rf drop outs. Reproducible L-H transition.

McPherson continues to show low Mo in H-mode, but
small injectionsin early phases of discharge.

DNB had 20 ms beam blips. CXRS shows good signal.
Will now phase DNB blips

May 16 2007 11:21:43:700AM 1070516006 Dennis Whyte constant H-mode at 2 MW Rf,
Reproducible L-H transition compares to
prevsious shots based on density evolution.

Prad has creeped up and core Mo too.
No signs of Mo I on Chromex (inner wall,
vertical target or upper shelf)

13 ms DNB blips. Good CXRS signals.

May 16 2007 11:44:12:863AM 1070516008 Dennis Whyte nl_04 at1.2e20
RF never really took hold due to matching problems.

Fewer injections with this long L-Mode.

May 16 2007 11:56:53:493AM 1070516009 Dennis Whyte nl_04 at1.2e20
RF still has matching problems.
RF gurus inform us that the edge pressure
is a bit too high.

We're going to lower nl04 to 1.1e20 to get
more reliable RF.

May 16 2007 12:23:06:850PM 1070516011 Dennis Whyte nl_04 = 1.0e20
H-mode at 1 MW RF
Steady H-mode at ~1.5 MW RF
J-ant had matching problems

so this looks like a good fiducial
at higher density. Will program
steady 1.5 MW RF for production shots.

May 16 2007 12:49:40:530PM 1070516012 Dennis Whyte H-mode, with 1.4 MW RF

Target nl = 1.0e20

Looks like good higher density fiducial

There are signs that the Prad is becoming
less stable in H-mode.

No sign of Mo I on Chromex

May 16 2007 12:52:52:750PM 1070516013 Dennis Whyte H-mode, with 1.4 MW RF
Target nl = 1.0e20

Had a few drop outs but steady
Prad.

Good DNB beam blips and CXRS data.

May 16 2007 01:41:14:940PM 1070516015 Dennis Whyte Good repeat H-mode at 1.5 MW.

May 16 2007 01:57:43:417PM 1070516016 Dennis Whyte fizzle

May 16 2007 02:03:28:747PM 1070516017 Dennis Whyte fizzle

May 16 2007 02:28:41:107PM 1070516019 Dennis Whyte fizzle

May 16 2007 02:45:15:143PM 1070516020 Dennis Whyte fizzle

May 16 2007 03:11:03:013PM 1070516021 Dennis Whyte the first applicaiton of 2 MW RF did not
result in H-mode. It's not clear why since the
target looks identical to 18 which went into H-mode

the H-mode was delayed until 0.9 s
but CXRS got some right gap sweep data

May 16 2007 03:11:11:513PM 1070516022 Dennis Whyte fizzle

May 16 2007 04:34:38:437PM 1070516026 Dennis Whyte Transiet H-mode in USN at 2.5 MW RF at 1.1 s.

Radiated / Mo power is rising rapidly...what does
this tell us about the importance of divertor Mo sources?

May 16 2007 04:39:58:377PM 1070516027 Dennis Whyte Two transient H-modes in USN at 2.5 MW RF

No signs of Mo I on Chromex

Physics Operator Comments

May 16 2007 09:46:29:837AM 1070516001 Jim Irby Loaded shot 1050823002 --- SNL, 800kA
Loaded shot 1070511036 into seg 1
recalulated seg 2, 3, and 4

Set PG1 for argon from 300 to 400 ms is enabled for the first shot

No change in prepuff from Friday: 18 ms

ICRF from 0.75 to 1.5 s with ramp to determine h-mode threshold

nl_04 request 8e19/m^2

diag and DNB gatevalves enabled (but no DNB for first two shots)

loaded shot at 0859

Waiting for rf conditioning of J-Port --- looking much better than yesterday

BP 1.1e-7 Torr

start at 09:31

plasma into rampdown --- no h-mode

lots of iron according to Matt --- .33 s

May 16 2007 10:20:17:690AM 1070516002 Jim Irby Increased clearin by 2 mm

BP 8.3e-7 Torr

plasma into rampdown --- more rf and an h-mode

h-mode at about 1.5 MW

inner gap still 2 mm too small, outer gap okay

plasma into rampdown

May 16 2007 10:20:59:440AM 1070516003 Jim Irby no changes

plasma into rampdown -- 2 h-modes --- Rachael is happy with the shot

DNB on next shot

May 16 2007 10:52:02:923AM 1070516004 Jim Irby No DPCS changes

hope for a little better rf

plasma into rampdown --- steady h-mode

DNB into plasma

May 16 2007 10:54:16:110AM 1070516005 Jim Irby No DPCS changes

Good plasma.
Wolfe taking over as physop for an hour.

May 16 2007 11:08:57:960AM 1070516006 Steve Wolfe
Shot#6: After shot#5, tmp 2 seems to have faied. Gate valve closed, will operate with one pump for now. Base pressure before INIT is 3.2e-6, asking for trouble! plasma, 2 hmodes, possible injection trip at 1.24sec base pressure at breakdown up to .045 from 0.04, but startup looks ok.

May 16 2007 11:25:29:217AM 1070516007 Steve Wolfe
Shot#7: Go to 1.2e20 for this shot. No beam, RF ramp. Disrupted 1.36sec. Looks like an injection, No H-mode. Hardly any RF; everybody faults out. Next: drop pg4 after high demsity disruption.

May 16 2007 11:33:57:580AM 1070516008 Steve Wolfe
Shot#8: drop pg4 from 18 to 16 msec after high density disruption. Irby's back and will take over from here

May 16 2007 11:49:23:650AM 1070516008 Jim Irby plasma for 1.8 s

some injections starting abour 1.75 s

May 16 2007 11:55:52:057AM 1070516009 Jim Irby No DPCS changes

RF tune should be better this shot

plasma into rampdown --- 1.86 s

rf still tripping out

May 16 2007 12:13:39:440PM 1070516010 Jim Irby nl_04 request to 1.1e20 /m^2 from 1.2e20/m^2

plasma into rampdown but still no rf

May 16 2007 12:28:09:943PM 1070516011 Jim Irby nl_04 request to 1.0e20/m^2

density into rampdown --- sustained h-mode at abt 1.5 MW

j-port in trouble at this density

May 16 2007 12:46:39:530PM 1070516012 Jim Irby no DPCS changes --- try to repeat shot 11

plasma into rampdown --- h-mode --- only 1.37 MW, d-port great, e-port trips

May 16 2007 01:02:38:880PM 1070516013 Jim Irby no DPCS changes

plasma into rampdown --- rf power constant at 1.45 MW
good h-mode

May 16 2007 01:15:00:523PM 1070516014 Jim Irby no DPCS changes

fizzle --- 2 mT jump in Bz0 at 6 to 8 ms??

May 16 2007 01:21:11:807PM 1070516015 Jim Irby ef4 from -1335 to -1340 A --- just to say I did something

plasma into rampdown

Bz0 back to normal

May 16 2007 01:47:01:740PM 1070516016 Jim Irby increased prepuff by 1 ms to 17 ms

put in outer gap sweep from 1.5 cm to 0.5 cm from 0.9 s to 1.3 s
rcur: 0.658 to 0.663

fizzle ---

Bz0 and Br0 okay, gas okay

May 16 2007 02:04:42:467PM 1070516017 Jim Irby no changes

fizzle ---

fields and gas still look okay

May 16 2007 02:21:54:697PM 1070516018 Jim Irby prepuff from 17 to 18 ms

plasma into rampdown

got the outer gap scan, but I forgot to drop density to 8e19/m^2

May 16 2007 02:28:26:653PM 1070516019 Jim Irby no DPCS changes

fizzle ---

May 16 2007 02:46:49:020PM 1070516020 Jim Irby try less gas --- 18 to 16 ms

gv2 open again for this shot

fizzle

May 16 2007 03:03:38:930PM 1070516021 Jim Irby added 1 ms of gas

plasma into rampdown --- late l to h transition

May 16 2007 03:11:06:683PM 1070516022 Jim Irby no changes

fizzle

May 16 2007 03:26:38:063PM 1070516023 Jim Irby loaded 1070511024 --- usn
loaded 1070516022 into seg 1
nl_04 request to 8e19/m^2

running seg 3

added 1 mm to rcur (reduce outer gap by 2 mm)

BP 7.6e-7 Torr

beautiful upper null fizzle

May 16 2007 04:08:21:223PM 1070516024 Jim Irby 10 minutes of ecdc in Helium at 5e-5 Torr; 44/45/103

BP 7.9e-7 Torr

plasma into rampdown but very little rf

May 16 2007 04:18:19:337PM 1070516025 Jim Irby repeat with rf we hope

plasma into rampdown --- no h-modes, rf

May 16 2007 04:26:53:870PM 1070516026 Jim Irby repeat

plasma into rampdown --- brief h-mode; elm-free

May 16 2007 04:38:37:407PM 1070516027 Jim Irby repeat with more rf if possible

plasma into rampdown

TCI CO2 demod for nl_05 failed, but stored data anyway. Same as last week, but
HeNe channel 3.

May 16 2007 04:56:05:693PM 1070516028 Jim Irby repeat

plasma into rampdown --- 3 h-modes

May 16 2007 05:11:14:230PM 1070516029 Jim Irby loaded seg 2 of shot 1070516018 into seg 2
turned of seg 3, turned on seg 2
dropped nl_04 request to 8e19/m^2

no power shot --- data system problems

Engineering Operator Comments

Shot Time Type Status Comment

1 09:32:00:800AM Plasma Ok

2 09:51:11:320AM Plasma Ok

3 10:07:57:907AM Plasma Ok

4 10:23:52:037AM Plasma Ok

5 10:51:29:313AM Plasma Ok

6 11:05:24:320AM Plasma Ok

7 11:19:47:823AM Plasma Ok

8 11:34:27:877AM Plasma Ok

9 11:49:35:227AM Plasma Ok

10 12:02:38:340PM Plasma Ok

11 12:15:24:813PM Plasma Ok

12 12:31:14:773PM Plasma Ok

13 12:45:18:450PM Plasma Ok

14 01:04:46:177PM Plasma Ok

15 01:17:17:430PM Plasma Ok

16 01:43:10:330PM Plasma Ok

17 01:56:18:040PM Plasma Ok

18 02:09:22:400PM Plasma Ok

19 02:22:07:417PM Plasma Ok

20 02:34:54:000PM Plasma Ok

21 02:47:17:737PM Plasma Ok

22 03:00:34:413PM Plasma Ok

23 03:21:16:093PM Plasma Ok

24 03:54:31:390PM Plasma Ok

25 04:07:11:220PM Plasma Ok

26 04:19:40:180PM Plasma Ok

27 04:32:21:637PM Plasma Ok

28 04:47:59:660PM Plasma Ok

29 05:00:58:227PM Test Bad

System Availability

May 16 2007 09:31:42:097AM

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 being digitized but not calibrated, still ICRF pickup. Midplane AXUV and divertor being digitized but analyzed data not ready. Apr 26 2007 10:27AM (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 no In-vessel hardware is installed; in-vessel cryogenic systems are leak-tight and have passed LN2 cool-down tests. Work is proceeding on external LHe and LN2 transfer lines as well as PLC control system. Mar 30 2007 10:53AM (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. May 01 2007 12:31PM (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 yes All channels now working. Apr 04 2007 11:04AM (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. But, low and noisy signals on SOME shots, others OK. May 10 2007 10:01AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPC2 yes Most slow channels (except 1,8,10,17) operational. Set to lower freqs for LHCD. Apr 11 2007 09:34AM (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. ready Mar 28 2007 08:50AM (ylin) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna no 80 MHz. FFT installation/coaxial line needs more work Mar 16 2007 09:32AM (ylin) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes 78 MHz Apr 04 2007 08:56AM (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 data being digitized, but analyzed data not ready. 2D arrays being debugged. Apr 26 2007 10:28AM (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 Bench tests are proceeding on a prototype MLP system. We hope to roll the system into the cell for testing in a few weeks, powering up a single electrode on the A-port scanning probe. Mar 13 2007 09:57PM (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 no System unavailable. The laser is under repair. Apr 04 2007 11:16PM (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 Starting on shot 1070510019, the 60, 110, 88, 88lsb, 88usb are connected but still being tested. The Swept frequency channel is sweeping at 1Hz (I'll check the frequency when there is cell access), also in the testing stage. May 10 2007 02:50PM (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 NL04 at 71.04 cm from 3/9/07 calibration Mar 09 2007 05:47PM (irby) Jim Irby Two-Color Interferometer (TCI) irby,murray
TS - Core yes 2 lasers, 11 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. May 10 2007 10:37AM (jwhughes) Jerry Hughes Core Thomson scattering jwhughes
TS - Edge yes Temperature calibration is complete. Density is uncalibrated. Apr 24 2007 08:20PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes
Vispec yes 350 and 670 nm, 4 spatial channels May 04 2007 01:02PM (agraf) Alex Graf Visible Spectrometer agraf

Session Leader Comments
May 16 2007 09:56:22:010AM	1070516001	Dennis Whyte	No H-mode. RF (J-ant) had many trips. Strange density pump out at onset of RF. Huge Fe injection at 0.3 s. Inner gap is 1 cm as compared to 1.5 in fiducial shot 1050823002.
May 16 2007 10:24:25:240AM	1070516002	Dennis Whyte	H-mode,at PRF ~ 1.5 MW. but RF started to trip out just after the transition. As a result the H-mode was not very constant. Mo and Prad jump around a bit with the RF but overall look steady. Have decided we'll get likely get reliable and repeatable H-mode with P_Rf = 2 MW steady. Hopefully the lower power input will also lengthen the utility of the BZN. Chromex has views of top of outer divertor shelf. Will monitor for Mo I. No Mo I present at this point.
May 16 2007 10:19:45:223AM	1070516003	Dennis Whyte	2 MW RF starting at 0.75 seconds. L-H transition looks good, with steady H-mode by ~ 1 s. Looks like a good fiducial with steady L-H transition and H-mode density steady after ~250 ms. This will be adequate for the CXRS background studies. What looks liks an antennae injection of Ni/Mo simultnaeously with the RF drop out and back transition at 1.15 s. Mcpherson shows steady Cu light during H-mode/RF phases.
May 16 2007 10:54:28:563AM	1070516004	Dennis Whyte	Constant RF at 2 MW from 0.75 to 1.5 s Good L-H transitions and steady H-mode with constant Prad. but a small impurity injection 1.09 s kicked down stored energy. The DNB was on at 5 A from 0.5 to 1.75, but the intensity increment was very weak on CXRS. This turns out to be consistent with post-BZN results from last weak. So it appears there is not enough signal strength to utilize the constant beam on constant for analysis and we're switching to the beam blips.
May 16 2007 11:07:03:320AM	1070516005	Dennis Whyte	constant H-mode at 2 MW Rf, with a few Rf drop outs. Reproducible L-H transition. McPherson continues to show low Mo in H-mode, but small injectionsin early phases of discharge. DNB had 20 ms beam blips. CXRS shows good signal. Will now phase DNB blips
May 16 2007 11:21:43:700AM	1070516006	Dennis Whyte	constant H-mode at 2 MW Rf, Reproducible L-H transition compares to prevsious shots based on density evolution. Prad has creeped up and core Mo too. No signs of Mo I on Chromex (inner wall, vertical target or upper shelf) 13 ms DNB blips. Good CXRS signals.
May 16 2007 11:44:12:863AM	1070516008	Dennis Whyte	nl_04 at1.2e20 RF never really took hold due to matching problems. Fewer injections with this long L-Mode.
May 16 2007 11:56:53:493AM	1070516009	Dennis Whyte	nl_04 at1.2e20 RF still has matching problems. RF gurus inform us that the edge pressure is a bit too high. We're going to lower nl04 to 1.1e20 to get more reliable RF.
May 16 2007 12:23:06:850PM	1070516011	Dennis Whyte	nl_04 = 1.0e20 H-mode at 1 MW RF Steady H-mode at ~1.5 MW RF J-ant had matching problems so this looks like a good fiducial at higher density. Will program steady 1.5 MW RF for production shots.
May 16 2007 12:49:40:530PM	1070516012	Dennis Whyte	H-mode, with 1.4 MW RF Target nl = 1.0e20 Looks like good higher density fiducial There are signs that the Prad is becoming less stable in H-mode. No sign of Mo I on Chromex
May 16 2007 12:52:52:750PM	1070516013	Dennis Whyte	H-mode, with 1.4 MW RF Target nl = 1.0e20 Had a few drop outs but steady Prad. Good DNB beam blips and CXRS data.
May 16 2007 01:41:14:940PM	1070516015	Dennis Whyte	Good repeat H-mode at 1.5 MW.
May 16 2007 01:57:43:417PM	1070516016	Dennis Whyte	fizzle
May 16 2007 02:03:28:747PM	1070516017	Dennis Whyte	fizzle
May 16 2007 02:28:41:107PM	1070516019	Dennis Whyte	fizzle
May 16 2007 02:45:15:143PM	1070516020	Dennis Whyte	fizzle
May 16 2007 03:11:03:013PM	1070516021	Dennis Whyte	the first applicaiton of 2 MW RF did not result in H-mode. It's not clear why since the target looks identical to 18 which went into H-mode the H-mode was delayed until 0.9 s but CXRS got some right gap sweep data
May 16 2007 03:11:11:513PM	1070516022	Dennis Whyte	fizzle
May 16 2007 04:34:38:437PM	1070516026	Dennis Whyte	Transiet H-mode in USN at 2.5 MW RF at 1.1 s. Radiated / Mo power is rising rapidly...what does this tell us about the importance of divertor Mo sources?
May 16 2007 04:39:58:377PM	1070516027	Dennis Whyte	Two transient H-modes in USN at 2.5 MW RF No signs of Mo I on Chromex

Physics Operator Comments
May 16 2007 09:46:29:837AM	1070516001	Jim Irby	Loaded shot 1050823002 --- SNL, 800kA Loaded shot 1070511036 into seg 1 recalulated seg 2, 3, and 4 Set PG1 for argon from 300 to 400 ms is enabled for the first shot No change in prepuff from Friday: 18 ms ICRF from 0.75 to 1.5 s with ramp to determine h-mode threshold nl_04 request 8e19/m^2 diag and DNB gatevalves enabled (but no DNB for first two shots) loaded shot at 0859 Waiting for rf conditioning of J-Port --- looking much better than yesterday BP 1.1e-7 Torr start at 09:31 plasma into rampdown --- no h-mode lots of iron according to Matt --- .33 s
May 16 2007 10:20:17:690AM	1070516002	Jim Irby	Increased clearin by 2 mm BP 8.3e-7 Torr plasma into rampdown --- more rf and an h-mode h-mode at about 1.5 MW inner gap still 2 mm too small, outer gap okay plasma into rampdown
May 16 2007 10:20:59:440AM	1070516003	Jim Irby	no changes plasma into rampdown -- 2 h-modes --- Rachael is happy with the shot DNB on next shot
May 16 2007 10:52:02:923AM	1070516004	Jim Irby	No DPCS changes hope for a little better rf plasma into rampdown --- steady h-mode DNB into plasma
May 16 2007 10:54:16:110AM	1070516005	Jim Irby	No DPCS changes Good plasma. Wolfe taking over as physop for an hour.
May 16 2007 11:08:57:960AM	1070516006	Steve Wolfe	Shot#6: After shot#5, tmp 2 seems to have faied. Gate valve closed, will operate with one pump for now. Base pressure before INIT is 3.2e-6, asking for trouble! plasma, 2 hmodes, possible injection trip at 1.24sec base pressure at breakdown up to .045 from 0.04, but startup looks ok.
May 16 2007 11:25:29:217AM	1070516007	Steve Wolfe	Shot#7: Go to 1.2e20 for this shot. No beam, RF ramp. Disrupted 1.36sec. Looks like an injection, No H-mode. Hardly any RF; everybody faults out. Next: drop pg4 after high demsity disruption.
May 16 2007 11:33:57:580AM	1070516008	Steve Wolfe	Shot#8: drop pg4 from 18 to 16 msec after high density disruption. Irby's back and will take over from here
May 16 2007 11:49:23:650AM	1070516008	Jim Irby	plasma for 1.8 s some injections starting abour 1.75 s
May 16 2007 11:55:52:057AM	1070516009	Jim Irby	No DPCS changes RF tune should be better this shot plasma into rampdown --- 1.86 s rf still tripping out
May 16 2007 12:13:39:440PM	1070516010	Jim Irby	nl_04 request to 1.1e20 /m^2 from 1.2e20/m^2 plasma into rampdown but still no rf
May 16 2007 12:28:09:943PM	1070516011	Jim Irby	nl_04 request to 1.0e20/m^2 density into rampdown --- sustained h-mode at abt 1.5 MW j-port in trouble at this density
May 16 2007 12:46:39:530PM	1070516012	Jim Irby	no DPCS changes --- try to repeat shot 11 plasma into rampdown --- h-mode --- only 1.37 MW, d-port great, e-port trips
May 16 2007 01:02:38:880PM	1070516013	Jim Irby	no DPCS changes plasma into rampdown --- rf power constant at 1.45 MW good h-mode
May 16 2007 01:15:00:523PM	1070516014	Jim Irby	no DPCS changes fizzle --- 2 mT jump in Bz0 at 6 to 8 ms??
May 16 2007 01:21:11:807PM	1070516015	Jim Irby	ef4 from -1335 to -1340 A --- just to say I did something plasma into rampdown Bz0 back to normal
May 16 2007 01:47:01:740PM	1070516016	Jim Irby	increased prepuff by 1 ms to 17 ms put in outer gap sweep from 1.5 cm to 0.5 cm from 0.9 s to 1.3 s rcur: 0.658 to 0.663 fizzle --- Bz0 and Br0 okay, gas okay
May 16 2007 02:04:42:467PM	1070516017	Jim Irby	no changes fizzle --- fields and gas still look okay
May 16 2007 02:21:54:697PM	1070516018	Jim Irby	prepuff from 17 to 18 ms plasma into rampdown got the outer gap scan, but I forgot to drop density to 8e19/m^2
May 16 2007 02:28:26:653PM	1070516019	Jim Irby	no DPCS changes fizzle ---
May 16 2007 02:46:49:020PM	1070516020	Jim Irby	try less gas --- 18 to 16 ms gv2 open again for this shot fizzle
May 16 2007 03:03:38:930PM	1070516021	Jim Irby	added 1 ms of gas plasma into rampdown --- late l to h transition
May 16 2007 03:11:06:683PM	1070516022	Jim Irby	no changes fizzle
May 16 2007 03:26:38:063PM	1070516023	Jim Irby	loaded 1070511024 --- usn loaded 1070516022 into seg 1 nl_04 request to 8e19/m^2 running seg 3 added 1 mm to rcur (reduce outer gap by 2 mm) BP 7.6e-7 Torr beautiful upper null fizzle
May 16 2007 04:08:21:223PM	1070516024	Jim Irby	10 minutes of ecdc in Helium at 5e-5 Torr; 44/45/103 BP 7.9e-7 Torr plasma into rampdown but very little rf
May 16 2007 04:18:19:337PM	1070516025	Jim Irby	repeat with rf we hope plasma into rampdown --- no h-modes, rf
May 16 2007 04:26:53:870PM	1070516026	Jim Irby	repeat plasma into rampdown --- brief h-mode; elm-free
May 16 2007 04:38:37:407PM	1070516027	Jim Irby	repeat with more rf if possible plasma into rampdown TCI CO2 demod for nl_05 failed, but stored data anyway. Same as last week, but HeNe channel 3.
May 16 2007 04:56:05:693PM	1070516028	Jim Irby	repeat plasma into rampdown --- 3 h-modes
May 16 2007 05:11:14:230PM	1070516029	Jim Irby	loaded seg 2 of shot 1070516018 into seg 2 turned of seg 3, turned on seg 2 dropped nl_04 request to 8e19/m^2 no power shot --- data system problems

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	09:32:00:800AM	Plasma	Ok
2	09:51:11:320AM	Plasma	Ok
3	10:07:57:907AM	Plasma	Ok
4	10:23:52:037AM	Plasma	Ok
5	10:51:29:313AM	Plasma	Ok
6	11:05:24:320AM	Plasma	Ok
7	11:19:47:823AM	Plasma	Ok
8	11:34:27:877AM	Plasma	Ok
9	11:49:35:227AM	Plasma	Ok
10	12:02:38:340PM	Plasma	Ok
11	12:15:24:813PM	Plasma	Ok
12	12:31:14:773PM	Plasma	Ok
13	12:45:18:450PM	Plasma	Ok
14	01:04:46:177PM	Plasma	Ok
15	01:17:17:430PM	Plasma	Ok
16	01:43:10:330PM	Plasma	Ok
17	01:56:18:040PM	Plasma	Ok
18	02:09:22:400PM	Plasma	Ok
19	02:22:07:417PM	Plasma	Ok
20	02:34:54:000PM	Plasma	Ok
21	02:47:17:737PM	Plasma	Ok
22	03:00:34:413PM	Plasma	Ok
23	03:21:16:093PM	Plasma	Ok
24	03:54:31:390PM	Plasma	Ok
25	04:07:11:220PM	Plasma	Ok
26	04:19:40:180PM	Plasma	Ok
27	04:32:21:637PM	Plasma	Ok
28	04:47:59:660PM	Plasma	Ok
29	05:00:58:227PM	Test	Bad