Alcator C-Mod Run 1070607 Information

Miniproposals

Miniproposal: 490

Date Filed: 5/24/2007

Title: Assessing LHCD in ICRF -Heated L and H-modes

First Author: Amanda Hubbard

Session Leader: Greg Wallace (shots 1-36)

Operators
Session leader(s):	Greg Wallace
Physics operator(s):	Bill Rowan
Engineering operator(s):	Ed Fitzgerald,Sam Pierson,Bill Byford

Engineering Operator Run Comment
MP#490 Assessing LHCD in ICRF-Heated L and H modes PO:Rowan SL:Hubbard,W

Session Leader Plans

Entered: Jun 6 2007 01:15:13:373PM

Author: Amanda Hubbard

Session leader plan for 1070607

MP 490: Assessing LHCD in ICRF-Heated L and H-modes
Session Leaders: Amanda Hubbard, Greg Wallace
Physics Operator: Bill Rowan

This first day of the MP will focus mainly on lower power LH coupling studies, using a LH waveform with multiple phases: 60 90 110 degrees and combining with various ICRH antennas. Mainly follow Day 1 of MP, but adjust due to newly commisioned cryopump, and current dipole configuration of J-port. Likely won't get to all steps today; aim is to understand and optimize coupling of LHCD into ICRF-heated plasmas, at least in L-mode, and hopefully begin the H-mode part.

1. Reestablish good LH coupling into ohmic, moderate density targets. Ip 800 kA, B 5.5T, nel 7e19 m-2. Start with equilibrium from 1070427008 (or a better shot from 1070606). Use short LHCD pulses of varied phase. Add ~ 1 MW J-port ICRF late in LH pulse. 1-2 shots.

2. Produce USN ohmic plasma with optimized shape for coupling, in order to enable L-modes with significant ICRF. ~3 shots to optimize shape, reduce LH reflections. nel =6e19 m-3

3. USN, L-modes. Add 1 MW J-port ICRF followed by 1 MW E-port. Vary Ip from 1.2 MA to 0.5 MA to assess sensitivity of ICRF density reduction from each ICRF antenna to this. 6 shots

4. USN. Determine most promising Ip from step 4 (expected to be higher currents since these map least to C-port). Increase J-port power to max available (1.5 MW?). 60, 90, 110 degree LH. Add moderate (0.5-1 MW) D or E-port ICRH towards end of J-port pulse to see effect on coupling. 2 shots.

5. USN. For a selected condition from steps 3 and 4 which gave difficulty coupling due to ICRH due to ne decrease, try puffing from NINJA to raise edge ne.

6. USN Repeat with CRYOPUMP COLD to see if ne rise is reduced, and whether LH (and/or J-port) couplings are improved.

7. Return to LSN, target nel=7e19 m-2. Determine optimum Ip and J-port power from preceding shots. Should give steady, moderate density, H-mode. Add LHCD, measure coupling, assess accessibility. 4-shots.

8. Puff D2 from NINJA into H-mode. Assess effects on coupling, and on plasma density and confinement (note that fuelling efficiency is generally lower into H-mode pedestal than L-mode, may be able to handle more gas without raising core ne). 2 shots.

9. Repeat with CRYOPUMP COLD. Reduce Ssep as needed for efficient pumping.

10. Time permitting, carry out limited scans of target density in L and/or H-mode plasmas, and current in H-mode plasmas, depending on prior results. Expect there will be tradeoffs between RF effects (lowest at higher Ip) and H-mode density (lowest at lower Ip).

Physics Operators Plans

Entered: Jun 6 2007 11:40:17:907AM

Author: Bill Rowan

Engineering Setup for Thursday, 7 June 2007; Run 1070607

MP#: 490 "Assessing LHCD in ICRF -Heated L and H-modes"

SL: Amanda Hubbard
PO: Bill Rowan

Engineering Setup
------------------
ECDC overnight in D2, pressure=2e-4 Torr. Rmin/Rdwell/Rmax = 44/45/103 cm.
Bake at 60 C.

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

Power systems as on 1070427008

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 then disable.

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

RF Systems:
----------
LH: Full power

ICRF: J-port at 2 MW essential; D and/or E desirable.
FMIT#1,2,3,4 in RUN-ON by 08:30

Diagnostics
----------
DNB: 50 kV, 6A by 09:00

Torvac setup
----------
Gate valves open

Session Leader Summaries

Entered: Jun 8 2007 12:11:12:940PM

Author: Greg Wallace

Session Leader Summary for 1070607: MP490 "Assessing LHCD in ICRF -Heated L and H-modes"

Started the run with LHRF+ICRF coupling studies. For coupling we used the standard 10ms on, 30ms off waveform at 100kW net power. This allows us to run with the CPS bypassed without the fear of persistent high-power arcs burning in the waveguides.

Early results were very promising. First two shots (4&5) were LSN to establish baseline with and without ICRF from J-port during LH. Surprisingly, reflections at 90 and 110 (20%, 25%) phasing are lower than 60 (30%) despite density being 1.5-3e18 where 60 should be equal is not slightly lower reflections based on previous observations. Turning on J during second half of LH in shot 5 increased reflections to 40%, 30%, 30% for 60, 90, 110 phasing. It was not noticed at the time, but reflection level in WG17 bottom was high in these shots and remained so all day.

Starting with shot 6 we switched to upper null to investigate ICRF without going into H-mode. USN with 800kW from J showed increased noise on the LH refco, but not higher levels as compared to LH pulses without ICRF. Increased J power to 1.1MW over a few shots with no harmful effect on LH coupling. Field line mapping from these shots indicates no connection between J and C antennae at currents from 650-1200 kA.

A current scan did not show substantially increased reflections from 1MW of E-port power, even at 650kA. D-port does have a dramatic effect on reflections at 1MW, particularly on the bottom rows.

Shots 15-18 were attempts for higher power, long pulse LH operation with ICRF in USN. Reflections were higher (40% at 90 phasing) despite same plasma conditions as previous low power pulses. Going back to low power pulses saw reflections drop from 40%-30%. Additionally, persistant arcing in the launcher waveguides prevented long pulse operation. This is a substantial decrease in power handling over previous runs.

Shot 21 attemped to use the cryopump for density control while puffing with NINJA. The pump could not keep up with the puff until the density saturated at 8.5e19 on nl04. LH probe densities continued to rise even though the line averaged density was constant.

Switch to LSN on shot 22 with 1MW each from J and E. Reflections went up from 25% to 30% and got noisier for 90 degree phasing during the H-mode with ICRF. Shot 23 showed very noisy reflections during L->H transition which got quieter during steady H-mode. It should be noted that these H-modes were very low quality with H-factor near 1.

An attempt at the end of the day to induce an arc in WG23C to test the new optical arc detector proved more difficult than expected. Seems as though the only time it won't arc is when we want it to.

Despite frustrations with the CPS and power handling during long pulses, the results of this run are very promising for operation of LHRF with ICRF and H-modes. We didn't see the sudden, dramatic drop in density due to ICRF which we did before boronization. Perhaps the boronization helps keep the density at the LH grill higher during ICRF?

Physics Operator Summaries

Entered: Jun 7 2007 05:59:23:180PM

Author: Bill Rowan

The run started with an LSN discharge which was copied from a previous LHCD run. The shot was 1070606003. The outer gap for this discharge was set to improve LH coupling during previous runs. The outer gap was scanned later in this run. The larger gaps used during the scan did not yield better coupling. The LSN discharges were 004,005, 022-032

The run also included an USN discharge. The starting point for this was shot 1070601031. The SL requested that the upper x-point be moved outboard by approximately 0.01 m to improve the LH couping. That was the only modification to the configuration. There was a current scan during this portion of the run. The USN discharges were 006-021

Score card
-----------
03 data cycle tests
26 plasmas
03 fizzles
-----------
32 total

Entered: Jun 7 2007 06:00:25:417PM

Author: Bill Rowan

The run started with an LSN discharge which was copied from a previous LHCD run. The shot was 1070606003. The outer gap for this discharge was set to improve LH coupling during previous runs. The outer gap was scanned later in this run. The larger gaps used during the scan did not yield better coupling. The LSN discharges were 004,005, 022-032

The run also included an USN discharge. The starting point for this was shot 1070601031. The SL requested that the upper x-point be moved outboard by approximately 0.01 m to improve the LH couping. That was the only modification to the configuration. There was a current scan during this portion of the run. The USN discharges were 006-021

Score card
-----------
03 data cycle tests
26 plasmas
03 fizzles
-----------
32 total

Session Leader Comments

Jun 7 2007 09:28:35:767AM 1070607004 Greg Wallace LSN shot with ICRF after LH for baseline. 90deg had best coupling of ~20%. Edge density farily high at 1.3-5e18m^-3. Next shot will move ICRF forward to .93s to cover the final six LH pulses.

Jun 7 2007 09:49:51:613AM 1070607005 Greg Wallace ICRF was moved to .93 sec, right after first three LH pulses. Non-ICRF pulses looked good as before. During ICRF (850kW on J) density dropped at edge and plasma went into H-mode. Coupling was still OK at 90 and 110 (30-35% refco), but worse at 60 (45%).

Next shot will be USN with ICRF and LH set up the same.

Jun 7 2007 09:59:45:033AM 1070607006 Greg Wallace Upper null. Density was quite high at the edge 3-7e18. Next shot will decrease the density from 9-6e19 nl04 and move upper and lower x-points out by 1cm each.

Reflections were 30-35% on all phases, no change during ICRF from J-port. Field line mapping shows J not connected to C.

Jun 7 2007 10:15:52:033AM 1070607007 Greg Wallace Plasma looks much better this time. Density is similar on top/middle/bottom probes in the range of .7-3e18 m^-3. Again, ICRF doen't seem to have a big effect on the LH grill with 90 degree phasing ~30% refco. Next shot will increase J-port power and add 3 additional LH pulses.

Jun 7 2007 10:28:18:800AM 1070607008 Greg Wallace LH looked good with reflections around 30% again for 90 and 110 and all 12 pulses went through. Repeat the same shot since J-port power trace seems not to have changed from shot 7.

Interestingly, LH probe density increased throughout the shot although line averaged density was decreasing for much of the shot.

Jun 7 2007 11:02:08:177AM 1070607009 Greg Wallace J-port and LH seemed to work well together and the data system problem went away. Next shot will add E-port at 1.22s. We expect to see some effect on coupling from E.

Jun 7 2007 11:14:03:707AM 1070607010 Greg Wallace At 1MA, 1MW from E-port does not seem to have a big effect on LH coupling! Next shot will be 850kA to try to get E to map more to C.

Jun 8 2007 11:36:30:827AM 1070607011 Greg Wallace As expected, LH refco went up, mostly on the lower rows while E is on at 850kA. Field line mapping shows more connection between C and E. Reflections still look good during J only.

Next shot will be 750kA.

Jun 7 2007 11:36:38:753AM 1070607012 Greg Wallace Reflections still look surprisingly good at 750kA. 60 phasing is high ~50%, but 90 and 110 are near 30%. Next shot will decrease current to 650kA.

Jun 7 2007 11:57:00:127AM 1070607013 Greg Wallace LH had good coupling even at 650kA with J and E. Next shot will add D at 1MW.

Jun 7 2007 12:26:47:690PM 1070607014 Greg Wallace D-port has clear negative effect on coupling. Next shot will be 1MA with long pulse LH at 100kW/klystron and J+E at 1MW each.

Jun 7 2007 12:25:40:410PM 1070607015 Greg Wallace Long pulse LH power with J and E. Arcing in WG9&10 caused the LH to trip out, although the effects of ICRF don't seem to be killing things. Next shot will decrease power on klystron 5 to mitigate arcing problem.

Jun 7 2007 12:59:09:817PM 1070607016 Greg Wallace Arcing in LH waveguide. More tripping from 17B. Will retry turning down power on arcing channels.

Jun 7 2007 12:59:29:643PM 1070607017 Greg Wallace Arcing in LH waveguide. More tripping from 17B. Will retry turning down power on arcing channels and adding cryopump.

Jun 7 2007 01:16:58:220PM 1070607018 Greg Wallace More tripping. Will try increasing the power on klystron 9, then go back to disabling the CPS if that doesn't work.

Jun 7 2007 01:34:43:317PM 1070607019 Greg Wallace No LH power. Next shot will go back to short, low power pulses.

Jun 7 2007 01:45:56:580PM 1070607020 Greg Wallace Next shot will add 20psi from NINJA for Puff'n'Pump.

This shot ran with lower reflections than high power shots. Seems to be some non-linearity.

Jun 7 2007 01:58:15:690PM 1070607021 Greg Wallace Next shot will be LSN without cryopump or NINJA.

This shot showed a big jump in nl04 when NINJA puffed, then held steady at 8e19 after 1s. Edge density continued to rise until 1.6s.

Jun 7 2007 02:19:16:207PM 1070607022 Greg Wallace Went into H-mode when ICRF came on (E+J).

Interestingly, density at grill increased during H-mode. Next shot will increase current to 1MA.

Jun 7 2007 02:31:40:597PM 1070607023 Greg Wallace Next shot will increase outer gap to ~1cm and increase ICRF power.

Coupling looked pretty good during H-mode, but very noisy during L->H transition.

Jun 7 2007 03:14:43:050PM 1070607024 Greg Wallace No LH power. Next shot will repeat.

Jun 7 2007 03:38:26:487PM 1070607025 Greg Wallace Larger outer gap dramatically decreased density at LH grill to < 5e17 m^-3. Reflections increased to 60-80%. Next shot will decrease outer gap to 2mm.

Jun 7 2007 04:02:06:550PM 1070607026 Greg Wallace High reflections again on top of grill due to low density. Next shot will be 600kA to avoid disruption and decrease confinement (thereby increasing edge density).

Jun 7 2007 04:02:25:880PM 1070607027 Greg Wallace Post disruption fizzle.

Jun 7 2007 04:13:10:330PM 1070607028 Greg Wallace Fizzle.

Jun 7 2007 04:38:34:017PM 1070607029 Greg Wallace 600kA LSN H-mode shot. Coupling didn't look so bad until the end of the pulse, when reflections grew to over 40%. Significant noise on the bottom row refco when ICRF turns on. Next shot will be to test the LH optical arc detection system.

Jun 7 2007 04:45:55:863PM 1070607030 Greg Wallace Tried for an arc in 23C, but tripping prevented power from getting high enough for an arc to occur. Will try again.

Jun 7 2007 05:05:16:847PM 1070607031 Greg Wallace Tried to get arcing in 23C at 150kW, but didn't arc! Will turn it up to 11 for the next shot.

Physics Operator Comments

Jun 7 2007 07:54:08:867AM Bill Rowan Made a change in the ninja setup.
Now: Back fill NINJA with D2 to 20 PSI and disable.

Jun 7 2007 08:17:36:053AM 1070607001 Bill Rowan 001. data cycle test

Jun 7 2007 08:17:47:430AM 1070607002 Bill Rowan 002. data cycle test

Jun 7 2007 08:18:01:367AM 1070607003 Bill Rowan 003. data cycle test

Jun 7 2007 08:18:40:290AM 1070607003 Bill Rowan For the next shot.
Load from 1070606003
This is a shot from yesterday that is similar to 1070427008 and is substituted

Jun 7 2007 08:21:36:623AM 1070607003 Bill Rowan For the next shot.
Load from 1070606003
This is a shot from yesterday that is similar to 1070427008 and is substituted

Jun 7 2007 09:26:57:473AM 1070607004 Bill Rowan 004. Plasma, Full length
nl_04 increase at 1.25s. Correlates with ICRF

Next shot.
No PCS changes

Jun 7 2007 09:38:12:457AM 1070607005 Bill Rowan 005. Plasma.

Jun 7 2007 09:44:06:783AM 1070607005 Bill Rowan Next shot.
USN: load from 1070601031, segment 3
turn segment 2 off
turn segment 3 on

Jun 7 2007 09:59:06:613AM 1070607006 Bill Rowan Next shot.
move the upper x-point out by 1 cm
reduced the density to approx 6e19=nl_o4

Jun 7 2007 10:09:34:313AM 1070607007 Bill Rowan 007. Plasma

Next shot.
Enable PG1/B-side lower: 100 ms Ar

Jun 7 2007 10:13:00:753AM 1070607007 Bill Rowan No PCS changes

Jun 7 2007 10:18:30:643AM 1070607008 Bill Rowan 008. Plasma

Jun 7 2007 10:45:06:410AM 1070607008 Bill Rowan 008. Plasma
RF data acquisition problems on this shot.

Next shot.
Repeat.
SL is uncertain of the diagnostic traces for the J-port antenna
CPCI received attention from Mark London prior to this shot. He �??rebooted the boards�??

Jun 7 2007 11:01:25:457AM 1070607009 Bill Rowan 009. Plasma

Next shot. No DPCS changes.

Jun 7 2007 11:01:40:283AM 1070607010 Bill Rowan 010. Plasma.

Jun 7 2007 11:12:27:317AM 1070607010 Bill Rowan Next shot.
IP reduced to 0.85 MA

Jun 7 2007 11:21:35:283AM 1070607011 Bill Rowan 011. Plasma
IP = 0.86 MA

Next shot.
IP = 0.75 MA

Jun 7 2007 11:36:04:360AM 1070607012 Bill Rowan 012. Plasma
IP = 0.77 MA

Next shot.
IP = 0.65 MA

Jun 7 2007 11:51:06:940AM 1070607013 Bill Rowan 013. Plasma
IP=0.68 MA

Next shot.
No DPCS changes

Jun 7 2007 12:11:10:830PM 1070607014 Bill Rowan 014, Plasma

Next shot.
Reload shot 1070607010

Jun 7 2007 12:25:19:220PM 1070607015 Bill Rowan 015. Plasma

Next shot
No DPCS changes.

Jun 7 2007 12:35:12:720PM 1070607016 Bill Rowan 016. Plasma.

Next shot.
No DPCS changes.

Jun 7 2007 12:50:18:050PM 1070607017 Bill Rowan 017. Plasma

Next shot.
Increase PG3 before 100 ms to reduce hard x-rays

Jun 7 2007 12:55:20:987PM 1070607017 Bill Rowan 017. Plasma

Next shot.
Increase PG3 before 100 ms to reduce hard x-rays
Cryopump on for the next shot.
Increased prefill (PG1) from 18 ms to 38 ms

Jun 7 2007 01:20:20:970PM 1070607018 Bill Rowan 018. Plasma
prefill okay

Next shot.
No DPCS changes.

Jun 7 2007 01:27:42:003PM 1070607019 Bill Rowan 019. Plasmas

Next shot.
Dust puffing starting. Check the dust entry in the logbook
Leave GV1 and GV2 closed for 300 s after the shot

Jun 7 2007 01:30:39:363PM 1070607019 Bill Rowan ncreased the prefill by 4 ms to get rid of runaways.

Jun 7 2007 01:38:16:487PM 1070607020 Bill Rowan 020. Plasma

Next shot.
Increased PG3 again.
Increased PG1 by 2 ms. This brings it up to 44 ms

Jun 7 2007 01:43:58:800PM 1070607020 Bill Rowan Start ninja puffing on the next shot. 0.8 s

Jun 7 2007 01:50:53:660PM 1070607021 Bill Rowan 021. Plasma

Next shot.
Increased prefill by 2 ms to 46 ms. Still seeing runaways.

Jun 7 2007 01:57:57:753PM 1070607021 Bill Rowan 021. Plasma

Next shot.
Increased prefill by 2 ms to 46 ms. Still seeing runaways.
Reload shot 1070607005, LSN
Cryopump off
Turning off NINJA
Reduce the prefill to 18 ms
Open GV1 and GV2 in normal time.

Jun 7 2007 02:13:19:567PM 1070607022 Bill Rowan 022. Plasma
Small hesitation on current rise.

Next shot.
Increase IP to 1 MA

Jun 7 2007 02:30:43:207PM 1070607023 Bill Rowan 023. Plasma

Next shot.
Increase the right gap by approximately 1 cm

Jun 7 2007 03:04:58:987PM 1070607024 Bill Rowan 024. Plasma

Next shot.
No DPCS changes.

Jun 7 2007 03:51:32:313PM 1070607026 Bill Rowan 026. Plasma. Disruption at ramp down.

Next shot
IP reduced to 0.6 MA

Jun 7 2007 04:07:55:673PM 1070607027 Bill Rowan 027, Fizzle. Post disruption fizzle.

Next shot.
Removed 1 ms form the prefill

Jun 7 2007 04:19:38:817PM 1070607028 Bill Rowan Reduce IP to 0.6 MA

Jun 7 2007 04:21:57:097PM 1070607028 Bill Rowan 028, Fizzle.
very high carbon

Next shot. Reload 1070607005

Jun 7 2007 04:36:36:190PM 1070607029 Bill Rowan 029. Plasma

Next shot.
Return to IP=800 kA

Jun 7 2007 04:47:15:973PM 1070607030 Bill Rowan 030. Plasma

Next shot.
Increase the outer gap by approximately 4 mm

Jun 7 2007 05:00:22:737PM 1070607031 Bill Rowan 031. Plasma

Next shot.
Repeat.

Jun 7 2007 05:10:52:190PM 1070607032 Bill Rowan 032. fizzle.

last shot.

Engineering Operator Comments

Shot Time Type Status Comment

1 07:41:37:790AM Test Ok No power test

2 07:54:03:180AM Test Ok No power test cycle

3 08:08:46:123AM Test Ok No power test cycle

4 09:18:01:190AM Plasma Ok

5 09:31:30:643AM Plasma Ok

6 09:47:19:533AM Plasma Ok

7 10:00:30:910AM Plasma Ok

8 10:14:53:847AM Plasma Ok

9 10:46:16:300AM Plasma Ok

10 10:58:54:360AM Plasma Ok

11 11:13:40:393AM Plasma Ok

12 11:26:16:033AM Plasma Ok

13 11:41:09:220AM Plasma Ok

14 11:55:53:550AM Plasma Ok

15 12:14:51:770PM Plasma Ok

16 12:28:06:237PM Plasma Ok

17 12:43:53:817PM Plasma Ok

18 12:59:49:940PM Plasma Ok

19 01:17:46:550PM Plasma Ok

20 01:32:40:067PM Plasma Ok

21 01:48:01:550PM Plasma Ok

22 02:01:02:143PM Plasma Ok

23 02:17:50:223PM Plasma Ok

24 02:54:21:550PM Plasma Ok

25 03:23:59:377PM Plasma Ok

26 03:41:56:283PM Plasma Ok

27 03:58:30:300PM Plasma Ok

28 04:11:34:567PM Plasma Ok

29 04:25:21:393PM Plasma Ok

30 04:38:39:783PM Plasma Ok

31 04:53:27:360PM Plasma Ok

32 05:08:12:550PM Plasma Ok

33 06:07:17:180PM Test Ok TF scanner Test

34 06:43:24:087PM Test Ok tf scanner test

35 07:15:04:167PM Test Ok tf scanner test

36 08:21:57:993PM Test Ok tf scanner test

System Availability

Jun 7 2007 07:53:44:447AM

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 for senstivity, still need better time constants. Midplane and divertor AXUV being digitized, processing calibration data. May 29 2007 11:22AM (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. 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. May 24 2007 08:40AM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPC2 yes Most channels (except 1,8,10,17) operational. Set to lower freqs for LHCD. May 24 2007 08:40AM (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, processing calibration data. Divertor views showing significant noise, and not available. Upper view being debugged. May 29 2007 11:23AM (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 60, 110, 88LSB, 88USB and 88 are connected but still being tested. The Swept frequency channel is running DC voltages from 5V-7V, also in the testing stage. Jun 01 2007 09:11AM (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, 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 2 lasers, 20 spatial channels. Fiber holder position is -125mm (standard). Density is cross-calibrated to the core system, based on shots 1070504014, 016, and 019. May 21 2007 02:39PM (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
Jun 7 2007 09:28:35:767AM	1070607004	Greg Wallace	LSN shot with ICRF after LH for baseline. 90deg had best coupling of ~20%. Edge density farily high at 1.3-5e18m^-3. Next shot will move ICRF forward to .93s to cover the final six LH pulses.
Jun 7 2007 09:49:51:613AM	1070607005	Greg Wallace	ICRF was moved to .93 sec, right after first three LH pulses. Non-ICRF pulses looked good as before. During ICRF (850kW on J) density dropped at edge and plasma went into H-mode. Coupling was still OK at 90 and 110 (30-35% refco), but worse at 60 (45%). Next shot will be USN with ICRF and LH set up the same.
Jun 7 2007 09:59:45:033AM	1070607006	Greg Wallace	Upper null. Density was quite high at the edge 3-7e18. Next shot will decrease the density from 9-6e19 nl04 and move upper and lower x-points out by 1cm each. Reflections were 30-35% on all phases, no change during ICRF from J-port. Field line mapping shows J not connected to C.
Jun 7 2007 10:15:52:033AM	1070607007	Greg Wallace	Plasma looks much better this time. Density is similar on top/middle/bottom probes in the range of .7-3e18 m^-3. Again, ICRF doen't seem to have a big effect on the LH grill with 90 degree phasing ~30% refco. Next shot will increase J-port power and add 3 additional LH pulses.
Jun 7 2007 10:28:18:800AM	1070607008	Greg Wallace	LH looked good with reflections around 30% again for 90 and 110 and all 12 pulses went through. Repeat the same shot since J-port power trace seems not to have changed from shot 7. Interestingly, LH probe density increased throughout the shot although line averaged density was decreasing for much of the shot.
Jun 7 2007 11:02:08:177AM	1070607009	Greg Wallace	J-port and LH seemed to work well together and the data system problem went away. Next shot will add E-port at 1.22s. We expect to see some effect on coupling from E.
Jun 7 2007 11:14:03:707AM	1070607010	Greg Wallace	At 1MA, 1MW from E-port does not seem to have a big effect on LH coupling! Next shot will be 850kA to try to get E to map more to C.
Jun 8 2007 11:36:30:827AM	1070607011	Greg Wallace	As expected, LH refco went up, mostly on the lower rows while E is on at 850kA. Field line mapping shows more connection between C and E. Reflections still look good during J only. Next shot will be 750kA.
Jun 7 2007 11:36:38:753AM	1070607012	Greg Wallace	Reflections still look surprisingly good at 750kA. 60 phasing is high ~50%, but 90 and 110 are near 30%. Next shot will decrease current to 650kA.
Jun 7 2007 11:57:00:127AM	1070607013	Greg Wallace	LH had good coupling even at 650kA with J and E. Next shot will add D at 1MW.
Jun 7 2007 12:26:47:690PM	1070607014	Greg Wallace	D-port has clear negative effect on coupling. Next shot will be 1MA with long pulse LH at 100kW/klystron and J+E at 1MW each.
Jun 7 2007 12:25:40:410PM	1070607015	Greg Wallace	Long pulse LH power with J and E. Arcing in WG9&10 caused the LH to trip out, although the effects of ICRF don't seem to be killing things. Next shot will decrease power on klystron 5 to mitigate arcing problem.
Jun 7 2007 12:59:09:817PM	1070607016	Greg Wallace	Arcing in LH waveguide. More tripping from 17B. Will retry turning down power on arcing channels.
Jun 7 2007 12:59:29:643PM	1070607017	Greg Wallace	Arcing in LH waveguide. More tripping from 17B. Will retry turning down power on arcing channels and adding cryopump.
Jun 7 2007 01:16:58:220PM	1070607018	Greg Wallace	More tripping. Will try increasing the power on klystron 9, then go back to disabling the CPS if that doesn't work.
Jun 7 2007 01:34:43:317PM	1070607019	Greg Wallace	No LH power. Next shot will go back to short, low power pulses.
Jun 7 2007 01:45:56:580PM	1070607020	Greg Wallace	Next shot will add 20psi from NINJA for Puff'n'Pump. This shot ran with lower reflections than high power shots. Seems to be some non-linearity.
Jun 7 2007 01:58:15:690PM	1070607021	Greg Wallace	Next shot will be LSN without cryopump or NINJA. This shot showed a big jump in nl04 when NINJA puffed, then held steady at 8e19 after 1s. Edge density continued to rise until 1.6s.
Jun 7 2007 02:19:16:207PM	1070607022	Greg Wallace	Went into H-mode when ICRF came on (E+J). Interestingly, density at grill increased during H-mode. Next shot will increase current to 1MA.
Jun 7 2007 02:31:40:597PM	1070607023	Greg Wallace	Next shot will increase outer gap to ~1cm and increase ICRF power. Coupling looked pretty good during H-mode, but very noisy during L->H transition.
Jun 7 2007 03:14:43:050PM	1070607024	Greg Wallace	No LH power. Next shot will repeat.
Jun 7 2007 03:38:26:487PM	1070607025	Greg Wallace	Larger outer gap dramatically decreased density at LH grill to < 5e17 m^-3. Reflections increased to 60-80%. Next shot will decrease outer gap to 2mm.
Jun 7 2007 04:02:06:550PM	1070607026	Greg Wallace	High reflections again on top of grill due to low density. Next shot will be 600kA to avoid disruption and decrease confinement (thereby increasing edge density).
Jun 7 2007 04:02:25:880PM	1070607027	Greg Wallace	Post disruption fizzle.
Jun 7 2007 04:13:10:330PM	1070607028	Greg Wallace	Fizzle.
Jun 7 2007 04:38:34:017PM	1070607029	Greg Wallace	600kA LSN H-mode shot. Coupling didn't look so bad until the end of the pulse, when reflections grew to over 40%. Significant noise on the bottom row refco when ICRF turns on. Next shot will be to test the LH optical arc detection system.
Jun 7 2007 04:45:55:863PM	1070607030	Greg Wallace	Tried for an arc in 23C, but tripping prevented power from getting high enough for an arc to occur. Will try again.
Jun 7 2007 05:05:16:847PM	1070607031	Greg Wallace	Tried to get arcing in 23C at 150kW, but didn't arc! Will turn it up to 11 for the next shot.

Physics Operator Comments
Jun 7 2007 07:54:08:867AM		Bill Rowan	Made a change in the ninja setup. Now: Back fill NINJA with D2 to 20 PSI and disable.
Jun 7 2007 08:17:36:053AM	1070607001	Bill Rowan	001. data cycle test
Jun 7 2007 08:17:47:430AM	1070607002	Bill Rowan	002. data cycle test
Jun 7 2007 08:18:01:367AM	1070607003	Bill Rowan	003. data cycle test
Jun 7 2007 08:18:40:290AM	1070607003	Bill Rowan	For the next shot. Load from 1070606003 This is a shot from yesterday that is similar to 1070427008 and is substituted
Jun 7 2007 08:21:36:623AM	1070607003	Bill Rowan	For the next shot. Load from 1070606003 This is a shot from yesterday that is similar to 1070427008 and is substituted
Jun 7 2007 09:26:57:473AM	1070607004	Bill Rowan	004. Plasma, Full length nl_04 increase at 1.25s. Correlates with ICRF Next shot. No PCS changes
Jun 7 2007 09:38:12:457AM	1070607005	Bill Rowan	005. Plasma.
Jun 7 2007 09:44:06:783AM	1070607005	Bill Rowan	Next shot. USN: load from 1070601031, segment 3 turn segment 2 off turn segment 3 on
Jun 7 2007 09:59:06:613AM	1070607006	Bill Rowan	Next shot. move the upper x-point out by 1 cm reduced the density to approx 6e19=nl_o4
Jun 7 2007 10:09:34:313AM	1070607007	Bill Rowan	007. Plasma Next shot. Enable PG1/B-side lower: 100 ms Ar
Jun 7 2007 10:13:00:753AM	1070607007	Bill Rowan	No PCS changes
Jun 7 2007 10:18:30:643AM	1070607008	Bill Rowan	008. Plasma
Jun 7 2007 10:45:06:410AM	1070607008	Bill Rowan	008. Plasma RF data acquisition problems on this shot. Next shot. Repeat. SL is uncertain of the diagnostic traces for the J-port antenna CPCI received attention from Mark London prior to this shot. He �??rebooted the boards�??
Jun 7 2007 11:01:25:457AM	1070607009	Bill Rowan	009. Plasma Next shot. No DPCS changes.
Jun 7 2007 11:01:40:283AM	1070607010	Bill Rowan	010. Plasma.
Jun 7 2007 11:12:27:317AM	1070607010	Bill Rowan	Next shot. IP reduced to 0.85 MA
Jun 7 2007 11:21:35:283AM	1070607011	Bill Rowan	011. Plasma IP = 0.86 MA Next shot. IP = 0.75 MA
Jun 7 2007 11:36:04:360AM	1070607012	Bill Rowan	012. Plasma IP = 0.77 MA Next shot. IP = 0.65 MA
Jun 7 2007 11:51:06:940AM	1070607013	Bill Rowan	013. Plasma IP=0.68 MA Next shot. No DPCS changes
Jun 7 2007 12:11:10:830PM	1070607014	Bill Rowan	014, Plasma Next shot. Reload shot 1070607010
Jun 7 2007 12:25:19:220PM	1070607015	Bill Rowan	015. Plasma Next shot No DPCS changes.
Jun 7 2007 12:35:12:720PM	1070607016	Bill Rowan	016. Plasma. Next shot. No DPCS changes.
Jun 7 2007 12:50:18:050PM	1070607017	Bill Rowan	017. Plasma Next shot. Increase PG3 before 100 ms to reduce hard x-rays
Jun 7 2007 12:55:20:987PM	1070607017	Bill Rowan	017. Plasma Next shot. Increase PG3 before 100 ms to reduce hard x-rays Cryopump on for the next shot. Increased prefill (PG1) from 18 ms to 38 ms
Jun 7 2007 01:20:20:970PM	1070607018	Bill Rowan	018. Plasma prefill okay Next shot. No DPCS changes.
Jun 7 2007 01:27:42:003PM	1070607019	Bill Rowan	019. Plasmas Next shot. Dust puffing starting. Check the dust entry in the logbook Leave GV1 and GV2 closed for 300 s after the shot
Jun 7 2007 01:30:39:363PM	1070607019	Bill Rowan	ncreased the prefill by 4 ms to get rid of runaways.
Jun 7 2007 01:38:16:487PM	1070607020	Bill Rowan	020. Plasma Next shot. Increased PG3 again. Increased PG1 by 2 ms. This brings it up to 44 ms
Jun 7 2007 01:43:58:800PM	1070607020	Bill Rowan	Start ninja puffing on the next shot. 0.8 s
Jun 7 2007 01:50:53:660PM	1070607021	Bill Rowan	021. Plasma Next shot. Increased prefill by 2 ms to 46 ms. Still seeing runaways.
Jun 7 2007 01:57:57:753PM	1070607021	Bill Rowan	021. Plasma Next shot. Increased prefill by 2 ms to 46 ms. Still seeing runaways. Reload shot 1070607005, LSN Cryopump off Turning off NINJA Reduce the prefill to 18 ms Open GV1 and GV2 in normal time.
Jun 7 2007 02:13:19:567PM	1070607022	Bill Rowan	022. Plasma Small hesitation on current rise. Next shot. Increase IP to 1 MA
Jun 7 2007 02:30:43:207PM	1070607023	Bill Rowan	023. Plasma Next shot. Increase the right gap by approximately 1 cm
Jun 7 2007 03:04:58:987PM	1070607024	Bill Rowan	024. Plasma Next shot. No DPCS changes.
Jun 7 2007 03:51:32:313PM	1070607026	Bill Rowan	026. Plasma. Disruption at ramp down. Next shot IP reduced to 0.6 MA
Jun 7 2007 04:07:55:673PM	1070607027	Bill Rowan	027, Fizzle. Post disruption fizzle. Next shot. Removed 1 ms form the prefill
Jun 7 2007 04:19:38:817PM	1070607028	Bill Rowan	Reduce IP to 0.6 MA
Jun 7 2007 04:21:57:097PM	1070607028	Bill Rowan	028, Fizzle. very high carbon Next shot. Reload 1070607005
Jun 7 2007 04:36:36:190PM	1070607029	Bill Rowan	029. Plasma Next shot. Return to IP=800 kA
Jun 7 2007 04:47:15:973PM	1070607030	Bill Rowan	030. Plasma Next shot. Increase the outer gap by approximately 4 mm
Jun 7 2007 05:00:22:737PM	1070607031	Bill Rowan	031. Plasma Next shot. Repeat.
Jun 7 2007 05:10:52:190PM	1070607032	Bill Rowan	032. fizzle. last shot.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	07:41:37:790AM	Test	Ok	No power test
2	07:54:03:180AM	Test	Ok	No power test cycle
3	08:08:46:123AM	Test	Ok	No power test cycle
4	09:18:01:190AM	Plasma	Ok
5	09:31:30:643AM	Plasma	Ok
6	09:47:19:533AM	Plasma	Ok
7	10:00:30:910AM	Plasma	Ok
8	10:14:53:847AM	Plasma	Ok
9	10:46:16:300AM	Plasma	Ok
10	10:58:54:360AM	Plasma	Ok
11	11:13:40:393AM	Plasma	Ok
12	11:26:16:033AM	Plasma	Ok
13	11:41:09:220AM	Plasma	Ok
14	11:55:53:550AM	Plasma	Ok
15	12:14:51:770PM	Plasma	Ok
16	12:28:06:237PM	Plasma	Ok
17	12:43:53:817PM	Plasma	Ok
18	12:59:49:940PM	Plasma	Ok
19	01:17:46:550PM	Plasma	Ok
20	01:32:40:067PM	Plasma	Ok
21	01:48:01:550PM	Plasma	Ok
22	02:01:02:143PM	Plasma	Ok
23	02:17:50:223PM	Plasma	Ok
24	02:54:21:550PM	Plasma	Ok
25	03:23:59:377PM	Plasma	Ok
26	03:41:56:283PM	Plasma	Ok
27	03:58:30:300PM	Plasma	Ok
28	04:11:34:567PM	Plasma	Ok
29	04:25:21:393PM	Plasma	Ok
30	04:38:39:783PM	Plasma	Ok
31	04:53:27:360PM	Plasma	Ok
32	05:08:12:550PM	Plasma	Ok
33	06:07:17:180PM	Test	Ok	TF scanner Test
34	06:43:24:087PM	Test	Ok	tf scanner test
35	07:15:04:167PM	Test	Ok	tf scanner test
36	08:21:57:993PM	Test	Ok	tf scanner test