Alcator C-Mod Run 1070503 Information

Miniproposals

Miniproposal: 468

Date Filed: 3/8/2007

Title: LH-driven fast electron diffusion time measurement

First Author: Andrea Schmidt

Session Leader: Andrea Schmidt (shots 26-37)

Miniproposal: 488

Date Filed: 4/27/2007

Title: Evaluation of the Fast Ferrite Tuning System on E-Port Antenna

First Author: Yijun Lin

Session Leader: Yijun Lin (shots 1-37)

Operators
Session leader(s):	Yijun Lin,Andrea Schmidt
Physics operator(s):	Earl Marmar
Engineering operator(s):	Bill Cochran,Andy Pfeiffer,Bill Byford

Engineering Operator Run Comment
MP 488: Evaluation of Fast Ferrite Tuning (1/2 day)MP 468: Fast electron

Session Leader Plans

Entered: May 3 2007 09:36:16:077AM

Author: Yijun Lin

MP 488: Evaluation of FFT operation to plasma

1. Evaluate the FFT operation to L-H-L transition. (fine tune FFT parameters
if necessary)
2. Evaluate the performance in different plasma parameter spaces, like density, and current.
3. Evaluate the power handling capabilities.

Physics Operators Plans

Entered: May 2 2007 06:02:46:643PM

Author: Earl Marmar

Engineering setup for Thursday 03 May 2007

MP 488: Evaluation of Fast Ferrite Tuning (1/2 day)
MP 468: Fast electron diffusion (1/2 day)

Session leaders: Y. Lin (MP 488) A. Schmidt (MP 468)
Physics operator: E. Marmar (with help from Steve Wolfe)

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

Due to the problem that occurred with flux loop F10 during Tuesday's run, plasma control programming has had to be changed. The current plan is to start testing this with plasma attempts (See Wolfe's logbook entries from 1070502 under MHD for details.)

Power systems as on 1070426013.

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 DISABLED (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3)
leave NINJA as is DISABLED

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

Torvac setup: Gate valves open during pulse.

-------------------------------------------------------------------------------
LH Setup: ready to operate by 1:00 pm at the latest, but can piggyback in the earlier part of the run if desired, to be coordinated with Yijun with regard to timing during the discharges.

ICRF Setup: ready to operate D, E and J for first plasma at 9:00 am

Run Plan:
Assuming all goes well getting and controlling plasmas in the absence of the F10 flux loop, start with FFT tests on E-port, using J and/or D to get H-Modes. It is likely that at least the first hour or so of the run will be consumed trying to get breakdown and current rise. At some point, if sufficient progress has been made, we will switch over to MP 468.

We plan to start the run at 9:00 am and finish at 5:00 pm.

Session Leader Summaries

Entered: May 4 2007 09:56:21:390AM

Author: Yijun Lin

The FFT system has successfully run in the following conditions
1. L-H-L transitions.
2. nl04 from 0.4 to 1.0e20 m^-2, and Ip from .5 to .8 MA
3. Forward power at <500 kW (circulating power < 1.7 MW).

The arc detected on FFT2 promptly shut off the transmitter power. The protection
system worked well.

Future work:
1. Fill in SF6 instead of N2. This should raise the power handling.
2. Install notch filters on the fft direction coupler signals to decouple noise
pickup from D port.

(Additional note on 1070504: Possible water leak into the tank(s) caused by
pumping out the gas in the line when fixing the leak on the elbow. The chilling water pump was running at 45 psi. With the gas pressure gone, the water pressure differential was 60 psi. We have to take out the tanks and open them to fix the problem).

Entered: May 6 2007 09:31:42:590AM

Author: Andrea Schmidt

MP: 468

Second 1/2 day run summary:

We square-wave modulated the LH power, 12.5 ms on, 12.5 ms off, for a variety of conditions. We scanned density from nl04=5e19 to 1e20 with Ip=800 kA. We also got data for nl04=1e20 and nl04=7.5e20 at Ip=500 kA. At the end of the day, we switched to 60 degree approximate phasing and repeated a single shot (800 kA, nl04=5e19) several times in order to boxcar bin average over several shots of data. From piggybacking off of the morning's run, we also had several shots with Ip=800, nl04=7.5e19, 90 degree ideal phasing. During the last few runs, the pellet injector was allowed to fire.

Physics Operator Summaries

Entered: May 3 2007 05:50:51:593PM

Author: Earl Marmar

Engineering setup for Thursday 03 May 2007

MP 488: Evaluation of Fast Ferrite Tuning (1/2 day)
MP 468: Fast electron diffusion (1/2 day)

Session leaders: Y. Lin (MP 488) A. Schmidt (MP 468)
Physics operator: E. Marmar (with help from Steve Wolfe)

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

Due to the problem that occurred with flux loop F10 during Tuesday's run, plasma control programming has had to be changed. The current plan is to start testing this with plasma attempts (See Wolfe's logbook entries from 1070502 under MHD for details.)

Power systems as on 1070426013.

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 DISABLED (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3)
leave NINJA as is DISABLED

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

Torvac setup: Gate valves open during pulse.

-------------------------------------------------------------------------------
LH Setup: ready to operate by 1:00 pm at the latest, but can piggyback in the earlier part of the run if desired, to be coordinated with Yijun with regard to timing during the discharges.

ICRF Setup: ready to operate D, E and J for first plasma at 9:00 am

Run Plan:
Assuming all goes well getting and controlling plasmas in the absence of the F10 flux loop, start with FFT tests on E-port, using J and/or D to get H-Modes. It is likely that at least the first hour or so of the run will be consumed trying to get breakdown and current rise. At some point, if sufficient progress has been made, we will switch over to MP 468.

We plan to start the run at 9:00 am and finish at 5:00 pm.

___________________________________________________________________

After a rather frustrating start, the run went well for the afternoon. Not unexpectedly, we got fizzles on the first 2 shots, and then had 2 full length plasmas in a row after fiddling slightly with gas, BR0 offset and RCUR offset. Then we got 14 fizzles in a row, changing fill and fields. Finally, reducing the BR0 offset to -.002 from -.001 for shot 19, gave us plasma. After 1 more fizzle on shot 24, we settled with BR0 offset of -.003 and all subsequent shots went to full current.

Both MPs got useful shots.

Scorecard:
Plasmas 20
Fizzles 17
______________
Total cycles 37

Session Leader Comments

May 3 2007 09:43:30:127AM Yijun Lin Work done yesterday on FFT preparation:
1. Adjusted l_stub1_init, and l_stub2_init. (to get better match)
2. Raised PID feedback gain. (to get faster feedback)
3. Adjusted the current overload threshold and tested. (not to be overloaded in normal operation)
4. Adjusted the scale factor of the current measurement.(so the feedback loop is consistent).
5. Included a dc offset in the digitizer on the current measurement.

May 3 2007 09:08:29:237AM 1070503001 Yijun Lin fizzle

May 3 2007 09:36:39:903AM 1070503003 Yijun Lin Plasma. Full length. Wow!
All transmitters ran on. 9:26 AM.
We will be ready 9:56 AM.

When the transmitters are ready,
E: 0.7-1.0 sec. 200 kW.
D: 0.8-1.5 sec, .8 MW
J: 0.8-1.5 sec, 1.6 MW

May 3 2007 09:44:18:597AM 1070503004 Yijun Lin Plasma. Full length.

ICRF not ready.
Will be ready for next shot.

E: 0.7-1.0 sec. 200 kW.
D: 0.8-1.5 sec, .8 MW
J: 0.8-1.5 sec, 1.6 MW

May 3 2007 09:58:22:787AM 1070503005 Yijun Lin fizzle

May 3 2007 10:10:18:870AM 1070503006 Yijun Lin fizzle

May 3 2007 10:22:51:563AM 1070503007 Yijun Lin fizzle

May 3 2007 10:35:28:370AM 1070503008 Yijun Lin fizzle

May 3 2007 10:47:51:773AM 1070503009 Yijun Lin fizzle

May 3 2007 11:00:50:780AM 1070503010 Yijun Lin Fizzle

May 3 2007 11:20:54:850AM 1070503011 Yijun Lin fizzle

May 3 2007 11:46:30:063AM 1070503012 Yijun Lin Fizzle

May 3 2007 11:46:24:940AM 1070503013 Yijun Lin Fizzle

May 3 2007 11:59:07:367AM 1070503014 Yijun Lin Fizzle

May 3 2007 12:17:29:997PM 1070503015 Yijun Lin Fizzle

May 3 2007 12:24:53:360PM 1070503016 Yijun Lin Fizzle

May 3 2007 12:59:21:110PM 1070503018 Yijun Lin Fizzle

May 3 2007 01:17:04:817PM 1070503019 Yijun Lin FFT successfully matched through L-H transition. Power reflection was kept below 10% at the transition, and below 1% other times

There was an arc detected by FFT2 at 0.85 sec.
This arc shut off the transmitters. Note: circulated power went up significantly in H-mode.

FMIT #4 got xbar fired after the pulse.

Next: Add 0.005 m fudge on L_DC1_STUB1 and L_STUB2_DC2 length, and see whether this can move the matched point closer to zero reflection.

May 3 2007 01:28:13:637PM 1070503020 Yijun Lin FFT got zero reflection before L-mode.
However, it oscillating in H-mode.

(The oscillation may be caused by interference from D port. We need
a notch filter on the FFT directional couplers to avoid it. )

There was an arc detected by FFT2 at 0.92 sec.
This arc shut off the transmitters. It seems that the N2 cannot sustain this much power. (We will have to fill SF6 in the future)

Next:
1. Reduce the feedback gain back to previous level. gain_st to -0.1, gain_cur to -0.25.
2. Also loose the threshold of good match (from 0.25% to 1%)
repeat.
3. No D port for a shot.

May 3 2007 01:38:01:187PM 1070503021 Yijun Lin FFT worked very well.
No arc this time (circulating power is lower).
Plasma in and out of H-mode, but the power reflection stayed within 5%.

Next: raise power to 400 kW.
(Raise the feedback gains to gain_st to -0.2 and gain_cur -0.5. We don't run
D together with E. There should not be oscillation).

May 3 2007 01:53:32:380PM 1070503022 Yijun Lin Arc on FFT #2 at 1.08 sec.
Power reflection was mostly kept below 5%.

Raising the feedback gain did not do much. The speed of the control
is mostly determined by the power supply capability (rate of current change).

Next: Ramping E power from .2 to .6 MW.

Making notch filters to filter out D port 80.5 MHz power, so that we
can run together with D port.

May 3 2007 02:08:22:447PM 1070503023 Yijun Lin Request
E port ramping up from .2 to .6 MW, 0.95 to 1.2 sec.
J port starts from 1.0 sec at 2.3 MW demand.

result:
Arc detected on FFT2 at 1.12 sec at 500 kW Pforw.
[Circulation power sqrt(dc2forw^2 + dc2refl^2) ~ 1.7 MW]
Power reflection was mostly kept below 5%.

(a false start cause from J port noise at 1.4 sec)

The power handling is getting better shot by shot.
Next: Raise power and see if it is getting better.

May 3 2007 02:10:54:527PM 1070503024 Yijun Lin Fizzle

May 3 2007 02:27:56:267PM 1070503025 Yijun Lin Request
E port ramping up from .4 to .8 MW, 0.95 to 1.2 sec.
J port starts from 1.0 sec at 2.3 MW demand.

result:
Arc detected on FFT2 at 1.03 sec at 500 kW Pforw.
[Circulation power sqrt(dc2forw^2 + dc2refl^2) ~ 1.6 MW]
Power reflection was mostly kept below 5%.

The power handling is the slightly worse than shot 23.

I think we cannot go higher power with N2 in. Hopefully, SF6 will help in the future.

next: Just run it at lower power and see how it performs at different plasma parameters.

May 3 2007 02:45:12:790PM 1070503026 Yijun Lin Request
E port ramping up from .4 to .8 MW, 1.3 to 1.5 sec.
J from 1 sec, D from 1.4 sec.

result:

E ran. (D and J max faults because density changed from nl 04 from .8 to 1.0).
Both FFT power currents to max. The load is outside the design region, but the match is mostly below 10%.

The FFT was all right dealing with dc1 arcs (rf retry, not matching to arcs, etc)

Next: repeat.

May 3 2007 03:06:47:720PM 1070503027 Yijun Lin Request: nl 0.75
E port ramping up from .4 to .8 MW, 1.3 to 1.5 sec.
J port starts from 1.0 sec at 2.3 MW demand.

result:
E ran. arc detected on FFT2 at 1.36 sec (500 kW in H-mode).

Got a mismatch in the start.
The power threshold (50 kW) to start FFT is too high. I would try 10 kW for next shot. (The FFTs would run with noises from D/J, but this seems to not a concern).

Next: repeat.

May 3 2007 03:05:16:047PM 1070503028 Yijun Lin Request: nl 0.65
E port ramping up from .4 to .8 MW, 1.3 to 1.5 sec.

result:
E ran. arc detected on FFT2 at 1.36 sec (500 kW in H-mode).
(same as last shot).

Start-up all-right after lowering the power threshold to 10 kW.

Next: Lower E port demand to 0.3 MW flat. There is no point to run it with arc all the time.

May 3 2007 03:35:11:433PM 1070503030 Yijun Lin Request: nl 0.6, 0.8 MA
E port 0.3 MW, 1.3 to 1.5 sec
D and J run at 3 MW total.

result:
E ran. Noise from D port made the feedback crazy.
Next: no D port until the notch filters are installed.

May 3 2007 03:46:46:470PM 1070503031 Yijun Lin Request: nl 0.45, 0.8 MA
E port 0.3 MW, 1.3 to 1.5 sec
J run at 2.2 MW total.

result:
E ran. nice.

May 3 2007 04:01:34:727PM 1070503032 Yijun Lin Request: nl 0.5, 0.5 MA
E port 0.3 MW, 1.3 to 1.5 sec
J run at 2.2 MW total.

result:
E ran. Multiple L-H-L transitions. But it kept the power reflection below 5%.
J: 4 faults.

May 3 2007 04:18:43:513PM 1070503033 Yijun Lin Request: nl 0.5, 0.5 MA
E port 0.3 MW, 1.3 to 1.5 sec
J run at 2.2 MW total.

result:
E ran. Multiple L-H-L transitions. But it kept the power reflection below 5%.
(Note: these H-modes are out of the design parameters).
Same as last shot

May 3 2007 04:28:32:750PM 1070503034 Yijun Lin Request: nl 0.6, 0.8 MA
E port 0.3 MW, 1.3 to 1.5 sec
J run at 2.2 MW total.

result:
E ran. good match.

May 4 2007 09:52:30:433AM 1070503037 Yijun Lin Request: nl 0.6, 0.8 MA
E port 0.3 MW, 1.3 to 1.5 sec
J run at 2.2 MW total.

result:
E got better match during pellet injection.

Physics Operator Comments

May 2 2007 06:44:58:410PM Steve Wolfe
The following measures have been taken to deal with the loss of flux loop F10 and the continuing loss of flux loop F11 in preparation for operation on Thursday, 1070503: 1) The F10 input has been turned off in the \hybrid::top.config.inputs and \hybrid::top.dpcs_config.inputs branches, and the \hybrid::top.config:config_id has been updated to warn Physics Operators to recalculate all magnetics predictors. 2) The fluxihh predictors have been modified to ignore the F10 and F11 loops. Changes were made to the routines fluxihh.pro and ianup.pro, and a new ian tree pulse file (ian_005.*) was created; the tree was generated using /home/wolfe/idl/ian/filaments/wtdfil_new.pro 3) The coefficients in the \analysis::top:fluxihh branch have been updated to match the behavior of the fluxihh predictors, using /usr/local/cmod/codes/mhd/fluxihh/load_predictors_procedure.sh 4) The vacuum predictors (Br_0) was updated by creating a new mhd_static_2012 pulse file and changing \analysis::top:recon_vac:static_shot to point to 2012. The static tree was populated using /home/wolfe/idl/RECON_VAC/fix_recon_vac.pro with a tolerance =0.01 and specifying F10,F11,F17,F18A as bad. This change also updates the RECON_VAC signals. 5) The filament predictors (ZCUR) are updated automatically by calling them with the hybrid f10 input turned off. No additional action was required. 6) The weights on Flux_09 (F10) in \analysis::efit_efitin:fwtsi and \efit::efit_efitin:fwtsi model files were modified to return 0. on shots after 1070501010. 7) An expression synthesizing a bogus signal based on full flux loops f09, f19 and f18a, under the assumption of up-down symmetry, was substituted into \mag_fluxes:flux_09 in the magnetics model tree. This will be picked up by MFLUX and the VacBrBz nodes. 8) Ian has imported the new versions of ianup.pro and the ian_005 pulse files into his directory, which will probably cause MFIL to use these values for future shots.

May 3 2007 09:09:45:067AM 1070503001 Earl Marmar bring up PCS
This has all the changes that Steve Wolfe put in to account for the F10 flux loop problem.
Load; no obvious problems.

fizzle
fields don't look terrible; BR might be a bit high
breakdown at about the right time; current rise looks slow

when in doubt, change the prefill puff

May 3 2007 09:21:16:100AM 1070503002 Earl Marmar prefill to 21 msec (from 27 msec)

fizzle
similar to shot 1
high and inside, ball 2

May 3 2007 09:44:20:627AM 1070503003 Earl Marmar RCUR offset to 1300 (from 1800)
BR0 offset to -.0015 (from -.001)

plasma; doesn't look horrible; some early runaways
ohmic H-mode late in the flattop

May 3 2007 10:08:28:010AM 1070503004 Earl Marmar no pcs changes

LH should inject on this one (starting at .7 seconds)
plasma
modulated LH
another late flattop ohmic H-mode

May 3 2007 10:02:51:680AM 1070503005 Earl Marmar no pcs changes

fizzle
Ip might be rising slightly too quickly

May 3 2007 10:10:12:967AM 1070503006 Earl Marmar add 1 msec to prefill puff (now 22 msec)
enable DNB gatevalve
enable Argon puff, 50 msec starting at 0.3

fizzle

May 3 2007 10:30:51:817AM 1070503007 Earl Marmar add 2 msec to prefill puff (now 24 msec)
BR_0 offset to -.0018 (from -.0015)

fizzle

May 3 2007 10:58:46:640AM 1070503008 Earl Marmar subtract 1 msec from prefill puff (now 23 msec)
RCUR offset to 900 (from 1300)

fizzle

May 3 2007 10:57:21:860AM 1070503009 Earl Marmar subtract 2 msec from prefill puff (now 21 msec)
BR_0 offset to -.0015
RCUR offset to 1300

fizzle

May 3 2007 11:12:34:973AM 1070503010 Earl Marmar add 3 msec to prefill puff (now 24 msec)

fizzle

May 3 2007 11:27:26:713AM 1070503011 Earl Marmar no pcs changes
disable DNB gatevalve (should give higher fill pressure)

fizzle
second lump on H-alpha looks smaller

May 3 2007 11:38:36:717AM 1070503012 Earl Marmar add 2msec to prefill puff, now 26 msec
if this doesn't go, we'll go the other way

fizzle

May 3 2007 11:53:40:770AM 1070503013 Earl Marmar reduce prefill puff to 19 msec

fizzle

May 3 2007 12:06:05:167PM 1070503014 Earl Marmar reduce prefill puff to 17 msec

fizzle

May 3 2007 12:15:22:327PM 1070503015 Earl Marmar EF4 current 15 amp more negative before t=0 (now -1350A)

fizzle
looks like almost no plasma current at all

May 3 2007 12:34:05:363PM 1070503016 Earl Marmar prefill puff to 20 msec

fizzle

May 3 2007 12:47:33:823PM 1070503017 Earl Marmar reload segment 1 from shot 3 today (1070503003)

fizzle

May 3 2007 12:55:18:153PM 1070503018 Earl Marmar BR_0 offset to -.001 from -.0015

fizzle

May 3 2007 01:15:26:940PM 1070503019 Earl Marmar BR_0 offset to -.002 from -.001

plasma

got ICRF H-modes on this one.

May 3 2007 01:24:34:570PM 1070503020 Earl Marmar BR_0 offset to -.0025 from -.002

plasma

May 3 2007 01:37:22:123PM 1070503021 Earl Marmar increase argon puff to 100 msec, starting at 0.3 seconds

plasma

May 3 2007 02:02:37:087PM 1070503022 Earl Marmar enable DNB gate valve

plasma

May 3 2007 02:02:53:553PM 1070503023 Earl Marmar no pcs changes

plasma

May 3 2007 02:13:18:370PM 1070503024 Earl Marmar argon puff to 125 msec (from 100 msec)

fizzle

May 3 2007 02:30:22:270PM 1070503025 Earl Marmar BR0 offset to -.003 from -.0025

plasma

May 3 2007 02:42:56:820PM 1070503026 Earl Marmar Switching to MP 468, fast electron diffusion with LHCD

nl_04 target to 1e20

plasma

May 3 2007 02:53:10:200PM 1070503027 Earl Marmar nl_04 target to 7.5e19

plasma

desity was a bit higher than the target

May 3 2007 03:09:22:860PM 1070503028 Earl Marmar nl_04 target to 6.5e19

plasma

May 3 2007 03:09:12:313PM 1070503029 Earl Marmar Ip to 500kA

May 3 2007 03:39:20:030PM 1070503030 Earl Marmar Ip to 800kA
nl_04 target to 5e19
Reduce outer gap 4 mm (increase RCUR 2 mm)

plasma

May 3 2007 03:51:28:160PM 1070503031 Earl Marmar nl_04 target to 4.5e19

plasma

May 3 2007 04:03:20:587PM 1070503032 Earl Marmar tweak the early PG3 gas pre-programming (segments 1 and 2)
Ip to 500 kA
increase outer gap 2 mm (reduce RCUR 1 mm)

plasma

May 3 2007 04:24:57:703PM 1070503033 Earl Marmar nl_04 target to 5e19

plasma

May 3 2007 04:33:18:893PM 1070503034 Earl Marmar increase RCUR 1mm
Ip to 800 kA
enable LPI gate valve

plasma

May 3 2007 05:02:53:937PM 1070503035 Earl Marmar no pcs changes

plasma

May 3 2007 05:02:37:280PM 1070503036 Earl Marmar no pcs changes

plasma

May 3 2007 05:23:42:990PM 1070503037 Earl Marmar no pcs changes

plasma
disrupts shortly after Li pellet injection at 1.51 s

Engineering Operator Comments

Shot Time Type Status Comment

1 08:59:13:920AM Plasma Ok

2 09:11:50:160AM Plasma Ok

3 09:24:08:823AM Plasma Ok

4 09:39:24:170AM Plasma Ok

5 09:55:56:943AM Plasma Ok

6 10:08:27:747AM Plasma Ok

7 10:20:57:063AM Plasma Ok

8 10:33:36:693AM Plasma Ok

9 10:46:00:847AM Plasma Ok

10 10:58:51:343AM Plasma Ok

11 11:19:05:397AM Plasma Ok

12 11:32:01:543AM Plasma Ok

13 11:44:38:190AM Plasma Ok

14 11:57:26:803AM Plasma Ok

15 12:10:25:683PM Plasma Ok

16 12:23:12:360PM Plasma Ok

17 12:35:46:100PM Plasma Ok

18 12:48:21:963PM Plasma Ok

19 01:01:04:110PM Plasma Ok

20 01:15:32:740PM Plasma Ok

21 01:28:35:730PM Plasma Ok

22 01:41:11:327PM Plasma Ok

23 01:55:02:223PM Plasma Ok

24 02:09:01:900PM Plasma Ok

25 02:21:42:263PM Plasma Ok

26 02:34:10:427PM Plasma Ok

27 02:46:44:493PM Plasma Ok

28 02:59:38:623PM Plasma Ok

29 03:14:32:990PM Plasma Ok

30 03:28:19:730PM Plasma Ok

31 03:42:44:200PM Plasma Ok

32 03:56:33:113PM Plasma Ok

33 04:11:48:697PM Plasma Ok

34 04:25:34:563PM Plasma Ok

35 04:39:41:990PM Plasma Ok

36 04:55:36:310PM Plasma Ok

37 05:09:20:313PM Plasma Ok

System Availability

May 3 2007 08:58:48:030AM

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 no Jan 14 2007 01:47PM 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 Dewar recooled 5/2. Expect Chs 1-8 operational. May 02 2007 09:03AM (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 yes Tested 1.8MW to IDC, 5/1/07. Problems with 8B and 23. May 01 2007 10:59AM (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 The swept frequency channel is connected, bypassing the 110GHz board. The waveform generator voltage is 6.57V (129GHz). All other channels are disconnected. May 01 2007 10:02AM (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 not calibrated yet. Temperatures should be fairly reliable. Additional spatial channels will be added over the next several weeks. May 01 2007 08:27AM (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 no visible spectrometer between 350 and 670 nm, 4 spatial channels May 01 2007 08:58AM (agraf) Alex Graf Visible Spectrometer agraf

May 3 2007 10:33:17:037AM

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 no Jan 14 2007 01:47PM 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. May 03 2007 10:22AM (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 yes Tested 1.8MW to IDC, 5/1/07. Problems with 8B and 23. May 01 2007 10:59AM (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 The swept frequency channel is connected, bypassing the 110GHz board. The waveform generator voltage is 6.57V (129GHz). All other channels are disconnected. May 01 2007 10:02AM (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 not calibrated yet. Temperatures should be fairly reliable. Additional spatial channels will be added over the next several weeks. May 01 2007 08:27AM (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 no visible spectrometer between 350 and 670 nm, 4 spatial channels May 01 2007 08:58AM (agraf) Alex Graf Visible Spectrometer agraf

Session Leader Comments
May 3 2007 09:43:30:127AM		Yijun Lin	Work done yesterday on FFT preparation: 1. Adjusted l_stub1_init, and l_stub2_init. (to get better match) 2. Raised PID feedback gain. (to get faster feedback) 3. Adjusted the current overload threshold and tested. (not to be overloaded in normal operation) 4. Adjusted the scale factor of the current measurement.(so the feedback loop is consistent). 5. Included a dc offset in the digitizer on the current measurement.
May 3 2007 09:08:29:237AM	1070503001	Yijun Lin	fizzle
May 3 2007 09:36:39:903AM	1070503003	Yijun Lin	Plasma. Full length. Wow! All transmitters ran on. 9:26 AM. We will be ready 9:56 AM. When the transmitters are ready, E: 0.7-1.0 sec. 200 kW. D: 0.8-1.5 sec, .8 MW J: 0.8-1.5 sec, 1.6 MW
May 3 2007 09:44:18:597AM	1070503004	Yijun Lin	Plasma. Full length. ICRF not ready. Will be ready for next shot. E: 0.7-1.0 sec. 200 kW. D: 0.8-1.5 sec, .8 MW J: 0.8-1.5 sec, 1.6 MW
May 3 2007 09:58:22:787AM	1070503005	Yijun Lin	fizzle
May 3 2007 10:10:18:870AM	1070503006	Yijun Lin	fizzle
May 3 2007 10:22:51:563AM	1070503007	Yijun Lin	fizzle
May 3 2007 10:35:28:370AM	1070503008	Yijun Lin	fizzle
May 3 2007 10:47:51:773AM	1070503009	Yijun Lin	fizzle
May 3 2007 11:00:50:780AM	1070503010	Yijun Lin	Fizzle
May 3 2007 11:20:54:850AM	1070503011	Yijun Lin	fizzle
May 3 2007 11:46:30:063AM	1070503012	Yijun Lin	Fizzle
May 3 2007 11:46:24:940AM	1070503013	Yijun Lin	Fizzle
May 3 2007 11:59:07:367AM	1070503014	Yijun Lin	Fizzle
May 3 2007 12:17:29:997PM	1070503015	Yijun Lin	Fizzle
May 3 2007 12:24:53:360PM	1070503016	Yijun Lin	Fizzle
May 3 2007 12:59:21:110PM	1070503018	Yijun Lin	Fizzle
May 3 2007 01:17:04:817PM	1070503019	Yijun Lin	FFT successfully matched through L-H transition. Power reflection was kept below 10% at the transition, and below 1% other times There was an arc detected by FFT2 at 0.85 sec. This arc shut off the transmitters. Note: circulated power went up significantly in H-mode. FMIT #4 got xbar fired after the pulse. Next: Add 0.005 m fudge on L_DC1_STUB1 and L_STUB2_DC2 length, and see whether this can move the matched point closer to zero reflection.
May 3 2007 01:28:13:637PM	1070503020	Yijun Lin	FFT got zero reflection before L-mode. However, it oscillating in H-mode. (The oscillation may be caused by interference from D port. We need a notch filter on the FFT directional couplers to avoid it. ) There was an arc detected by FFT2 at 0.92 sec. This arc shut off the transmitters. It seems that the N2 cannot sustain this much power. (We will have to fill SF6 in the future) Next: 1. Reduce the feedback gain back to previous level. gain_st to -0.1, gain_cur to -0.25. 2. Also loose the threshold of good match (from 0.25% to 1%) repeat. 3. No D port for a shot.
May 3 2007 01:38:01:187PM	1070503021	Yijun Lin	FFT worked very well. No arc this time (circulating power is lower). Plasma in and out of H-mode, but the power reflection stayed within 5%. Next: raise power to 400 kW. (Raise the feedback gains to gain_st to -0.2 and gain_cur -0.5. We don't run D together with E. There should not be oscillation).
May 3 2007 01:53:32:380PM	1070503022	Yijun Lin	Arc on FFT #2 at 1.08 sec. Power reflection was mostly kept below 5%. Raising the feedback gain did not do much. The speed of the control is mostly determined by the power supply capability (rate of current change). Next: Ramping E power from .2 to .6 MW. Making notch filters to filter out D port 80.5 MHz power, so that we can run together with D port.
May 3 2007 02:08:22:447PM	1070503023	Yijun Lin	Request E port ramping up from .2 to .6 MW, 0.95 to 1.2 sec. J port starts from 1.0 sec at 2.3 MW demand. result: Arc detected on FFT2 at 1.12 sec at 500 kW Pforw. [Circulation power sqrt(dc2forw^2 + dc2refl^2) ~ 1.7 MW] Power reflection was mostly kept below 5%. (a false start cause from J port noise at 1.4 sec) The power handling is getting better shot by shot. Next: Raise power and see if it is getting better.
May 3 2007 02:10:54:527PM	1070503024	Yijun Lin	Fizzle
May 3 2007 02:27:56:267PM	1070503025	Yijun Lin	Request E port ramping up from .4 to .8 MW, 0.95 to 1.2 sec. J port starts from 1.0 sec at 2.3 MW demand. result: Arc detected on FFT2 at 1.03 sec at 500 kW Pforw. [Circulation power sqrt(dc2forw^2 + dc2refl^2) ~ 1.6 MW] Power reflection was mostly kept below 5%. The power handling is the slightly worse than shot 23. I think we cannot go higher power with N2 in. Hopefully, SF6 will help in the future. next: Just run it at lower power and see how it performs at different plasma parameters.
May 3 2007 02:45:12:790PM	1070503026	Yijun Lin	Request E port ramping up from .4 to .8 MW, 1.3 to 1.5 sec. J from 1 sec, D from 1.4 sec. result: E ran. (D and J max faults because density changed from nl 04 from .8 to 1.0). Both FFT power currents to max. The load is outside the design region, but the match is mostly below 10%. The FFT was all right dealing with dc1 arcs (rf retry, not matching to arcs, etc) Next: repeat.
May 3 2007 03:06:47:720PM	1070503027	Yijun Lin	Request: nl 0.75 E port ramping up from .4 to .8 MW, 1.3 to 1.5 sec. J port starts from 1.0 sec at 2.3 MW demand. result: E ran. arc detected on FFT2 at 1.36 sec (500 kW in H-mode). Got a mismatch in the start. The power threshold (50 kW) to start FFT is too high. I would try 10 kW for next shot. (The FFTs would run with noises from D/J, but this seems to not a concern). Next: repeat.
May 3 2007 03:05:16:047PM	1070503028	Yijun Lin	Request: nl 0.65 E port ramping up from .4 to .8 MW, 1.3 to 1.5 sec. result: E ran. arc detected on FFT2 at 1.36 sec (500 kW in H-mode). (same as last shot). Start-up all-right after lowering the power threshold to 10 kW. Next: Lower E port demand to 0.3 MW flat. There is no point to run it with arc all the time.
May 3 2007 03:35:11:433PM	1070503030	Yijun Lin	Request: nl 0.6, 0.8 MA E port 0.3 MW, 1.3 to 1.5 sec D and J run at 3 MW total. result: E ran. Noise from D port made the feedback crazy. Next: no D port until the notch filters are installed.
May 3 2007 03:46:46:470PM	1070503031	Yijun Lin	Request: nl 0.45, 0.8 MA E port 0.3 MW, 1.3 to 1.5 sec J run at 2.2 MW total. result: E ran. nice.
May 3 2007 04:01:34:727PM	1070503032	Yijun Lin	Request: nl 0.5, 0.5 MA E port 0.3 MW, 1.3 to 1.5 sec J run at 2.2 MW total. result: E ran. Multiple L-H-L transitions. But it kept the power reflection below 5%. J: 4 faults.
May 3 2007 04:18:43:513PM	1070503033	Yijun Lin	Request: nl 0.5, 0.5 MA E port 0.3 MW, 1.3 to 1.5 sec J run at 2.2 MW total. result: E ran. Multiple L-H-L transitions. But it kept the power reflection below 5%. (Note: these H-modes are out of the design parameters). Same as last shot
May 3 2007 04:28:32:750PM	1070503034	Yijun Lin	Request: nl 0.6, 0.8 MA E port 0.3 MW, 1.3 to 1.5 sec J run at 2.2 MW total. result: E ran. good match.
May 4 2007 09:52:30:433AM	1070503037	Yijun Lin	Request: nl 0.6, 0.8 MA E port 0.3 MW, 1.3 to 1.5 sec J run at 2.2 MW total. result: E got better match during pellet injection.

Physics Operator Comments
May 2 2007 06:44:58:410PM		Steve Wolfe	The following measures have been taken to deal with the loss of flux loop F10 and the continuing loss of flux loop F11 in preparation for operation on Thursday, 1070503: 1) The F10 input has been turned off in the \hybrid::top.config.inputs and \hybrid::top.dpcs_config.inputs branches, and the \hybrid::top.config:config_id has been updated to warn Physics Operators to recalculate all magnetics predictors. 2) The fluxihh predictors have been modified to ignore the F10 and F11 loops. Changes were made to the routines fluxihh.pro and ianup.pro, and a new ian tree pulse file (ian_005.*) was created; the tree was generated using /home/wolfe/idl/ian/filaments/wtdfil_new.pro 3) The coefficients in the \analysis::top:fluxihh branch have been updated to match the behavior of the fluxihh predictors, using /usr/local/cmod/codes/mhd/fluxihh/load_predictors_procedure.sh 4) The vacuum predictors (Br_0) was updated by creating a new mhd_static_2012 pulse file and changing \analysis::top:recon_vac:static_shot to point to 2012. The static tree was populated using /home/wolfe/idl/RECON_VAC/fix_recon_vac.pro with a tolerance =0.01 and specifying F10,F11,F17,F18A as bad. This change also updates the RECON_VAC signals. 5) The filament predictors (ZCUR) are updated automatically by calling them with the hybrid f10 input turned off. No additional action was required. 6) The weights on Flux_09 (F10) in \analysis::efit_efitin:fwtsi and \efit::efit_efitin:fwtsi model files were modified to return 0. on shots after 1070501010. 7) An expression synthesizing a bogus signal based on full flux loops f09, f19 and f18a, under the assumption of up-down symmetry, was substituted into \mag_fluxes:flux_09 in the magnetics model tree. This will be picked up by MFLUX and the VacBrBz nodes. 8) Ian has imported the new versions of ianup.pro and the ian_005 pulse files into his directory, which will probably cause MFIL to use these values for future shots.
May 3 2007 09:09:45:067AM	1070503001	Earl Marmar	bring up PCS This has all the changes that Steve Wolfe put in to account for the F10 flux loop problem. Load; no obvious problems. fizzle fields don't look terrible; BR might be a bit high breakdown at about the right time; current rise looks slow when in doubt, change the prefill puff
May 3 2007 09:21:16:100AM	1070503002	Earl Marmar	prefill to 21 msec (from 27 msec) fizzle similar to shot 1 high and inside, ball 2
May 3 2007 09:44:20:627AM	1070503003	Earl Marmar	RCUR offset to 1300 (from 1800) BR0 offset to -.0015 (from -.001) plasma; doesn't look horrible; some early runaways ohmic H-mode late in the flattop
May 3 2007 10:08:28:010AM	1070503004	Earl Marmar	no pcs changes LH should inject on this one (starting at .7 seconds) plasma modulated LH another late flattop ohmic H-mode
May 3 2007 10:02:51:680AM	1070503005	Earl Marmar	no pcs changes fizzle Ip might be rising slightly too quickly
May 3 2007 10:10:12:967AM	1070503006	Earl Marmar	add 1 msec to prefill puff (now 22 msec) enable DNB gatevalve enable Argon puff, 50 msec starting at 0.3 fizzle
May 3 2007 10:30:51:817AM	1070503007	Earl Marmar	add 2 msec to prefill puff (now 24 msec) BR_0 offset to -.0018 (from -.0015) fizzle
May 3 2007 10:58:46:640AM	1070503008	Earl Marmar	subtract 1 msec from prefill puff (now 23 msec) RCUR offset to 900 (from 1300) fizzle
May 3 2007 10:57:21:860AM	1070503009	Earl Marmar	subtract 2 msec from prefill puff (now 21 msec) BR_0 offset to -.0015 RCUR offset to 1300 fizzle
May 3 2007 11:12:34:973AM	1070503010	Earl Marmar	add 3 msec to prefill puff (now 24 msec) fizzle
May 3 2007 11:27:26:713AM	1070503011	Earl Marmar	no pcs changes disable DNB gatevalve (should give higher fill pressure) fizzle second lump on H-alpha looks smaller
May 3 2007 11:38:36:717AM	1070503012	Earl Marmar	add 2msec to prefill puff, now 26 msec if this doesn't go, we'll go the other way fizzle
May 3 2007 11:53:40:770AM	1070503013	Earl Marmar	reduce prefill puff to 19 msec fizzle
May 3 2007 12:06:05:167PM	1070503014	Earl Marmar	reduce prefill puff to 17 msec fizzle
May 3 2007 12:15:22:327PM	1070503015	Earl Marmar	EF4 current 15 amp more negative before t=0 (now -1350A) fizzle looks like almost no plasma current at all
May 3 2007 12:34:05:363PM	1070503016	Earl Marmar	prefill puff to 20 msec fizzle
May 3 2007 12:47:33:823PM	1070503017	Earl Marmar	reload segment 1 from shot 3 today (1070503003) fizzle
May 3 2007 12:55:18:153PM	1070503018	Earl Marmar	BR_0 offset to -.001 from -.0015 fizzle
May 3 2007 01:15:26:940PM	1070503019	Earl Marmar	BR_0 offset to -.002 from -.001 plasma got ICRF H-modes on this one.
May 3 2007 01:24:34:570PM	1070503020	Earl Marmar	BR_0 offset to -.0025 from -.002 plasma
May 3 2007 01:37:22:123PM	1070503021	Earl Marmar	increase argon puff to 100 msec, starting at 0.3 seconds plasma
May 3 2007 02:02:37:087PM	1070503022	Earl Marmar	enable DNB gate valve plasma
May 3 2007 02:02:53:553PM	1070503023	Earl Marmar	no pcs changes plasma
May 3 2007 02:13:18:370PM	1070503024	Earl Marmar	argon puff to 125 msec (from 100 msec) fizzle
May 3 2007 02:30:22:270PM	1070503025	Earl Marmar	BR0 offset to -.003 from -.0025 plasma
May 3 2007 02:42:56:820PM	1070503026	Earl Marmar	Switching to MP 468, fast electron diffusion with LHCD nl_04 target to 1e20 plasma
May 3 2007 02:53:10:200PM	1070503027	Earl Marmar	nl_04 target to 7.5e19 plasma desity was a bit higher than the target
May 3 2007 03:09:22:860PM	1070503028	Earl Marmar	nl_04 target to 6.5e19 plasma
May 3 2007 03:09:12:313PM	1070503029	Earl Marmar	Ip to 500kA
May 3 2007 03:39:20:030PM	1070503030	Earl Marmar	Ip to 800kA nl_04 target to 5e19 Reduce outer gap 4 mm (increase RCUR 2 mm) plasma
May 3 2007 03:51:28:160PM	1070503031	Earl Marmar	nl_04 target to 4.5e19 plasma
May 3 2007 04:03:20:587PM	1070503032	Earl Marmar	tweak the early PG3 gas pre-programming (segments 1 and 2) Ip to 500 kA increase outer gap 2 mm (reduce RCUR 1 mm) plasma
May 3 2007 04:24:57:703PM	1070503033	Earl Marmar	nl_04 target to 5e19 plasma
May 3 2007 04:33:18:893PM	1070503034	Earl Marmar	increase RCUR 1mm Ip to 800 kA enable LPI gate valve plasma
May 3 2007 05:02:53:937PM	1070503035	Earl Marmar	no pcs changes plasma
May 3 2007 05:02:37:280PM	1070503036	Earl Marmar	no pcs changes plasma
May 3 2007 05:23:42:990PM	1070503037	Earl Marmar	no pcs changes plasma disrupts shortly after Li pellet injection at 1.51 s

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:59:13:920AM	Plasma	Ok
2	09:11:50:160AM	Plasma	Ok
3	09:24:08:823AM	Plasma	Ok
4	09:39:24:170AM	Plasma	Ok
5	09:55:56:943AM	Plasma	Ok
6	10:08:27:747AM	Plasma	Ok
7	10:20:57:063AM	Plasma	Ok
8	10:33:36:693AM	Plasma	Ok
9	10:46:00:847AM	Plasma	Ok
10	10:58:51:343AM	Plasma	Ok
11	11:19:05:397AM	Plasma	Ok
12	11:32:01:543AM	Plasma	Ok
13	11:44:38:190AM	Plasma	Ok
14	11:57:26:803AM	Plasma	Ok
15	12:10:25:683PM	Plasma	Ok
16	12:23:12:360PM	Plasma	Ok
17	12:35:46:100PM	Plasma	Ok
18	12:48:21:963PM	Plasma	Ok
19	01:01:04:110PM	Plasma	Ok
20	01:15:32:740PM	Plasma	Ok
21	01:28:35:730PM	Plasma	Ok
22	01:41:11:327PM	Plasma	Ok
23	01:55:02:223PM	Plasma	Ok
24	02:09:01:900PM	Plasma	Ok
25	02:21:42:263PM	Plasma	Ok
26	02:34:10:427PM	Plasma	Ok
27	02:46:44:493PM	Plasma	Ok
28	02:59:38:623PM	Plasma	Ok
29	03:14:32:990PM	Plasma	Ok
30	03:28:19:730PM	Plasma	Ok
31	03:42:44:200PM	Plasma	Ok
32	03:56:33:113PM	Plasma	Ok
33	04:11:48:697PM	Plasma	Ok
34	04:25:34:563PM	Plasma	Ok
35	04:39:41:990PM	Plasma	Ok
36	04:55:36:310PM	Plasma	Ok
37	05:09:20:313PM	Plasma	Ok