Alcator C-Mod Run 1091118 Information

Miniproposals

Miniproposal: 583

Date Filed: 9/29/2009

Title: Optimization of mode conversion flow drive

First Author: Yijun Lin

Session Leader: Yijun Lin (shots 1-35)

Operators
Session leader(s):	Yijun Lin
Physics operator(s):	Steve Wolfe
Engineering operator(s):	Bill Parkin,Bill Cochran,Bill Byford

Engineering Operator Run Comment
automatically entered by signon - please replace with real comment

Session Leader Plans

Entered: Nov 17 2009 04:49:01:310PM

Author: Yijun Lin

SL-plan for Run: 1091118
MP583: Optimization of mode conversion flow drive (Day 2)
SL: Lin
PO: Wolfe

Boronization: no.
ECDC in D2 overnight.
ICRF: J at 50MHz and D/E at 80 MHz.
B side-top: 15 psi He3.
B side-lower: 1 psi Ar.

Argon puff enabled for spectroscopy measurement (125 ms sec puff)
He3 puff enabled starts at 0.2 sec, length specified below.

Plasma: start with 1091113036, B field @ 5.1 T, USN, 0.6 MA, nl = 0.8e20 m^-2, He3 puff 100 ms

Main diagnostics: He3 monitor, HIREX, FRC-ECE, and PCI.

*** Step 1: Ip dependence (6-15 shots)

Ip scan: 0.6, 0.8, 1.0, 1.2 MA, (If the rotation is very sensitive to current, add more Ip data points).

He3 puff 100 ms, from t= 0.2 sec. J antenna waveform: from 0.6 to 1.5 sec, 4 steps, 0.8 MW, 1.6 MW, 2.2 MW, 2.8 MW, 200 ms each.

Run 2 shots at each current. One in +90 degree phase, and the other one in -90 degree phase. If necessary, run one in dipole phase also.

(If the antenna phase dependence is different at different Ip, I will run phase scan within a shot, and keep RF power constant). this could help reconcile the C-Mod data and JET data.

*** Step 2: Plasma density dependence (5 shots)

Reload shot 1091113006, He3 puff 100 ms from t = 0.2 sec.
J +90 degree. J antenna waveform: from 0.6 to 1.5 sec, 4 steps, 0.8 MW, 1.6 MW, 2.2 MW, 2.8 MW, 200 ms each.

Vary nl04 shot by shot: 0.8, 0.6, 1.0, 1.2e20

*** Step 3: LSN and H-mode (10-15 shots)

reload shot 1091112031, 0.8 MA, LSN, nl04 = 0.8e20 m^-02, Change B field to 5.1 T.
He3 puff 100 ms.

D+E: 2 MW, 0.6-1.5 sec. To establish EDA H-mode.
J: 2.5 MW, 0.8-1.5 sec. +90 degree. Check the change in rotation.

Vary He3 shot by shot, and check the trend in rotation.

After flow drive effect is observed, use steps in J power and check out power dependence. Also check out antenna phase dependence, Ip dependence and density dependence.

**** Step 4: RF modulation for momentum transport study (2 shots)

Reload shot 1091113006, Modulate RF power, 200 ms on, 150 ms off. Vary modulation period.

**** Step 5: TBD. Options: inner-wall limited discharge, maximize rotation in H-mode, checking ITB, etc.

Physics Operators Plans

Entered: Nov 17 2009 01:45:52:200PM

Author: Steve Wolfe

Physop Plan and Engineering Setup for 18-Nov-2009
MP#583 "Optimization of MC flow drive" (part 2)
SL: Yijun Lin
PO: wolfe
------------------------------
ECDC Parameters (overnight)
------------------------------
gas and pressure: D2 at 2e-4 Torr
sweep: 44/45/103 cm
scan: 20/120 s
60C bake

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

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

Power systems as on: 1091113036

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 ENABLED (PG1)
leave B-side upper as is (15psi He3) Hybrid ENABLED (PG2)
fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3)
fill NINJA with 10 psi D2 DISABLED

Enable gatevalves and shutters: ECE, VUV, HIREX_SR, Z-bolo

Torvac gatevalve toggle (yes/no): No

Boronization(yes/no): no
Overnight ECDC (yes/no): YES
ICRF(yes/no): yes (all four xmtrs)
LH(yes/no): no
DNB(yes/no): no
Cryopump (yes/no): no

Vessel temperature: 35/35/35

-----------------------
Physics Operator plan:
-----------------------
Start from 1091113036, Bt=5.1T, USN, 0.6MA, nl04=8e19
Change duration of He3 puff from 75msec to 100msec
Drop pg4 from 36msec to something reasonable

Proceed as directed by SL (see SL_PLAN)

Session Leader Summaries

Entered: Nov 19 2009 12:15:32:423PM

Author: Yijun Lin

Sl_summary:

We have explored many parameters dependence of the mode conversion flow drive, and the run was very successful (except that we were not able to obtain good long EDAs).

Ip scan: shot 1-12. The higher Ip, the larger rotation (roughly linear dependence). Also the difference among different antenna phases becomes larger at larger Ip. At low Ip, both +90 and -90 antenna phases show little effect, while at high Ip the difference can be a factor of 2 (although still in co-Ip direction). The dipole and +90 phases are always close while dipole is slightly weaker. The dependence on Ip may be due to the 1/q dependence of mode conversion to the ion cyclotron wave branch, and possibly momentum confinement time difference.

Density scan: shot 14-21. The lower density, the larger rotation. The rotation scales with 1/ne. This would indicate a total momentum argument. That is, if the input momentum is fixed, the rotation would scale 1/ne.

Lower null (L-mode) vs. upper null: shot 22, 26. Very similar behavior. Apparently no dependence on the plasma topology.

Lower null H-modes (shot 27-30): we were not able to get good long EDA H-modes. Thus this part was inconclusive.

Momentum transport (shot 31-32): Good RF modulation and rotation modulation.
Preliminary analysis seems that the rotation goes up instantaneously from core and edge.

Physics Operator Summaries

Entered: Nov 18 2009 05:22:40:460PM

Author: Steve Wolfe

Physop Summary for Wed. 18-Nov-2009 MP#583 MC Flow drive optimization SL: Y. Lin PO: wolfe EO: The Bills (Parkin, Cochran, Byford) The machine ran pretty well today, and Yijun got through most of his run plan, although the LSN H-mode portion was pretty much a bust because the H-modes were so ratty. This part may also have been handicapped because we only had E-port for a bulk heater, as FMIT#1 breaker died this morning and needs repair. Most of the day was run in USN, with currents from 0.6 to 1.35MA (the latter around q95=2.8 at 5.1T). The highest current had some difficulties, though we got at least one shot to run through. It was necessary to raise the current limits on OH1, and I also raised them on the OH2's and EF3 for good measure. The whole day was at 5.1T in flattop (5.3T startup). The major problem from the Physop point of view today was runaways. These started showing up on shot #8 and were prevalent from then on. I raised pg4 from 25 to 40msec (.11mTorr), changed the RCUR program waveform, added voltage to EF3, reduced V_OH1, and moved IC_ef4 up and down by 15Amps. The only thing that seemed to help was raising the pg3 puff, although the increase in V_EF3 did seem to do some good for a while. There was one computer delay when pcdaqeng1 had to be rebooted, but we didn't need any no power shots. Power systems performed well all day. RF (J and E) ran pretty well, with a few faults from J, which was the workhorse today. One issue was that the J RF was sourcing a lot of density, which actually prevented us from getting the lowest requested density at high currents. This was most clearly demonstrated by the modulation experiments at the end of the day, where the rf modulation was clearly visible on D-alpha and nl04. Shots#23-25 were two short disruptions and a fizzle, for reasons I couldn't diagnose except that the disruptions were both heavily runaway dominated and looked very dirty (probably Mo). The fizzle was probably just due to the disruptions. The LSN cases seemed to have more Mo than the USN. The last shot, #35, was also a short runaway-dominated disruption, but this one seemed to have something fall in during startup. Scorecard: No Power/tests 0 Duds 0 Fizzles 2 Plasmas 33 (4 early disruptions, the rest mostly useable) ========== == Total shots 35

Session Leader Comments

Nov 18 2009 09:06:53:310AM 1091118001 Yijun Lin FMIT #1 will be down today. No D port. This may affect the late part of run which will needs power from D/E.

Shot 1: 0.6 MA, 100 ms He3 puff. +90 degree phase. J power 4 steps.

Got He monitor 0.1, several RF trips later.
Rotation DV ~ 0.1 (Matt's program) < 1/6 of that seen in 0.8 MA.
(Similar result as shot 1091113036).

Next: run -90 degree, and maybe there is counter-Ip rotation.

Nov 18 2009 09:21:03:570AM 1091118002 Yijun Lin Shot 2: 0.6 MA, 100 ms He3 puff. -90 degree phase. J power 4 steps.

OK. No counter-Ip rotation. Very similar to shot 1. Small change, but still in Co-Ip direction.

PCI saw much stronger ICW in than shot 001 (why?)

Next: 0.8 MA. -90 degree.

Nov 18 2009 09:34:28:633AM 1091118003 Yijun Lin 0.8 MA, 100 ms He3 puff. -90 degree phase. J power 4 steps.

Rotation going counter after 1.2 sec. (no apparent change in mode conversion. Is it plasma density changing?)

Next: repeat.

Nov 18 2009 09:48:20:553AM 1091118004 Yijun Lin 0.8 MA, 100 ms He3 puff. -90 degree phase. J power 4 steps.

Rotation was going up until 1.05 sec, then slow down and to counter at higher power. (2 shots in a row, this is likely real).

Next: Run modulated RF power (1.6 MW and 2.6 MW, and see whether this bizarre behavior can be repeated).

Nov 18 2009 10:00:49:727AM 1091118005 Yijun Lin 0.8 MA, 100 ms He3 puff. -90 degree phase. J power modulated.

Rotation was going up until 1.2 sec, then going down. Maybe it is the decrease of He3 in plasma.

Next: 4 step J power, +90 degree. Comparison to shot 4.

Nov 18 2009 10:13:21:790AM 1091118006 Yijun Lin 0.8 MA, 100 ms He3 puff. +90 degree phase. J power 4 steps (comparison vs. shot 4)

Rotation was going up until 1.34 sec, a MARFE killed the rotation.
(Peak DV about the same as shot 4, but rotation goes down in shot 4 after 1 sec).

Next: 4 step J power, +90 degree. 1 MA.

Nov 18 2009 10:25:07:820AM 1091118007 Yijun Lin 1.0 MA, 100 ms He3 puff. +90 degree phase. J power 4 steps

Rotation was going up until 1.4 sec. reasonable following RF power steps.
Peak dV ~ 52 km/s.

Next: 4 step J power, -90 degree, 1 MA.

Nov 18 2009 10:37:09:477AM 1091118008 Yijun Lin 1.0 MA, 100 ms He3 puff. -90 degree phase. J power 4 steps

Rotation was going up until 1.4 sec. reasonable following RF power steps, but clearly smaller than +90 phase.
Peak dV ~ 30 km/s.

Next: 4 step J power, -90 degree, 1.2 MA.

Nov 18 2009 10:52:35:103AM 1091118009 Yijun Lin 1.2 MA, 100 ms He3 puff. -90 degree phase. J power 4 steps

Rotation was going up, peak at 1.1 sec, then goes down. Similar to shot 4 (also at -90 degree phase). there must be something about -90 degree phase.

Peak dV ~ 34 km/s.

Next: 4 step J power, +90 degree, 1.2 MA.

Nov 18 2009 11:18:21:243AM 1091118011 Yijun Lin 1.2 MA, 100 ms He3 puff. 180 dipole degree phase. J power 4 steps

Good rotation.

Peak dV ~ 65 km/s. Similar to shot 10. Consistent to previous result.

Next: 1.35 MA. +90 phase.

Nov 18 2009 11:36:04:947AM 1091118012 Yijun Lin 1.35 MA, 100 ms He3 puff. +90 dipole degree phase. J power 4 steps

Good rotation.

Peak dV ~ 60 km/s. Slightly lower than in shot 10.

Next: repeat. 1.35 MA. -90 phase.

Nov 18 2009 11:53:08:447AM 1091118013 Yijun Lin early disruption.

Next: density scan.
1 MA, nl04 0.6, +90 phase

Nov 18 2009 12:28:52:227PM 1091118014 Yijun Lin 1 MA, 100 ms He3 puff. +90 dipole degree phase. J power 2.6 MW

nl04 = 0.6e20 m^-2.

No HIREX data. Gate valve was closed due to disruption.

Next: repeat. Increase He3 puff to 150 ms (the level seems to be decreasing shot by shot since shot 10).

Nov 18 2009 01:00:12:960PM 1091118015 Yijun Lin 1 MA, 150 ms He3 puff. +90 dipole degree phase. J power 2.6 MW

nl04 = 0.6e20 m^-2.

good rotation data. DV 60 km/s @ 0.8 sec, Peak DV 80 km/s @ 1.35 sec.
No PCI data this shot.

Next: nl04 -> 0.8e20 m^-2

Nov 18 2009 12:59:27:557PM 1091118016 Yijun Lin 1 MA, 150 ms He3 puff. +90 dipole degree phase. J power 2.6 MW

nl04 = 0.8e20 m^-2.

good rotation data.
Peak DV 60 km/s @ 0.8 sec. 62 km/s@ 1.3 sec

Next: nl04 -> 1.0e20 m^-2

Nov 18 2009 01:07:25:680PM 1091118017 Yijun Lin 1 MA, 150 ms He3 puff. +90 dipole degree phase. J power 2.6 MW

nl04 = 1.0e20 m^-2.

good rotation data.
Peak DV 37 km/s @ 0.8 sec. 34 km/s@ 1.3 sec, MARFE 0.8-1 sec, slowed rotation.
the rotation is definite slower this shot.

Next: nl04 -> 1.2e20 m^-2

Nov 18 2009 01:20:34:727PM 1091118018 Yijun Lin 1 MA, 150 ms He3 puff. +90 dipole degree phase. J power 2.6 MW

nl04 = 1.2e20 m^-2.

good rotation data.
Peak DV 20 km/s @ 0.8 sec. 11 km/s@ 1.3 sec,
the rotation is definite much slower this shot.

he3 signal is much higher, but PCI shows similar location of Mode conversion (~ R = 66 cm)

So the density dependence is real. Higher density, less efficient.

Next: nl04 -> 0.4e20 m^-2

Nov 18 2009 01:41:03:930PM 1091118019 Yijun Lin fizzle.

Nov 18 2009 01:44:17:710PM 1091118020 Yijun Lin 1 MA, 150 ms He3 puff. +90 dipole degree phase. J power 2.6 MW

nl04 = 0.52e20 m^-2 (asked for 0.4)

good rotation data.
Peak DV 74 km/s @ 0.8 sec. 126 km/s@ 1.3 sec,

Next: repeat, and the density will be lower.

Nov 18 2009 02:01:31:227PM 1091118021 Yijun Lin 1 MA, 150 ms He3 puff. +90 dipole degree phase. J power 2.6 MW

nl04 = 0.48e20 m^-2 (asked for 0.4)

good rotation data.
Peak DV 80 km/s @ 0.8 sec. 100 km/s@ 1.1 sec.

(density will not go lower due to degassing when the RF is on.)

Next: LSN. 1 MA, nl04 0.5, 5.1 T, 150 ms He3.

Nov 18 2009 02:20:12:790PM 1091118022 Yijun Lin 1 MA, 150 ms He3 puff. +90 dipole degree phase. J power ramp-up

nl04 = 0.5e20 m^-2

good rotation data.
Peak DV 65 km/s @ 0.8 sec.

Ti way up.

Next: repeat. with constant J power to compare with shot 21. Add 100 ms He3 at 1 sec.

Nov 18 2009 02:25:38:197PM 1091118023 Yijun Lin early disruption.

Nov 18 2009 02:38:45:993PM 1091118024 Yijun Lin early disruption. two in a row.

Nov 18 2009 02:57:56:197PM 1091118025 Yijun Lin fizzle.
Next: since we are losing shots, I will add E port power and see the effect in H-mode.

Nov 18 2009 03:15:23:663PM 1091118026 Yijun Lin 1 MA, 150 ms He3 puff at 0.2, 100 ms He3 puff at 1.0 sec.
+90 dipole degree phase. J power + E power.

nl04 = 0.5e20 m^-2

good rotation data. No H-mode.
No rotation change from E. Peak DV 60 km/s @ 1.2 sec with J on.

Next: repeat. raise density. Run J constant. plus E port to get H-mode.

Nov 18 2009 03:37:35:103PM 1091118028 Yijun Lin 1 MA, 150 ms He3 puff at 0.2, 100 ms He3 puff at 1.0 sec.
+90 dipole degree phase. J power + E power.

nl04 = 0.7e20 m^-2, short H-modes. Not good.

He3 too much? Not much in PCI either.

Next: Only puff He3 once, for 100 ms, from 0.2 sec

Nov 18 2009 03:47:57:070PM 1091118029 Yijun Lin 1 MA, 100 ms He3 puff at 0.2 s.
+90 dipole degree phase. J power + E power.

nl04 = 0.7e20 m^-2, still shorty H-modes.

DV ~ 40 km/s. Most likely just density effect.

Next: 0.8 MA, nl 0.8, try to see whether we can get nice long H-mode.

Nov 18 2009 04:04:31:960PM 1091118030 Yijun Lin 0.8 MA, 100 ms He3 puff at 0.2 s.
+90 dipole degree phase. J power + E power.

nl04 = 0.8e20 m^-2, many shorty H-modes.

DV ~ 40 km/s. close to the intrinsic scaling (or just density scaling?). Decide to punt H-mode part. It won't work.

Next: 1.2 MA, USN, nl = 0.5e20 m^-2, J 2.6 MW.

Nov 18 2009 04:15:52:837PM 1091118031 Yijun Lin 1.2 MA, 100 ms He3 puff at 0.2 s.
+90 dipole degree phase. J power

ask for nl 0.5e20, got 0.8

DV ~ 50 km/s. About what I expected.

Next: repeat. RF modulated 100 ms on, 100 ms off.

Nov 18 2009 04:31:16:727PM 1091118032 Yijun Lin 1.2 MA, 100 ms He3 puff at 0.2 s.
+90 dipole degree phase. J power

ask for nl 0.5e20, got 0.8e20 during RF.

DV ~ 50 km/s. Similar to 31. Good rotation modulation.

Next: repeat. -90 phase.

Nov 18 2009 04:40:52:773PM 1091118033 Yijun Lin J4 faulted out early.
Next: lower power to 2.4 MW, repeat -90 degree phase.

Nov 18 2009 04:53:31:853PM 1091118034 Yijun Lin 1.2 MA, 100 ms He3 puff at 0.2 s.
-90 dipole degree phase. J power

ask for nl 0.5e20, got 0.8e20 during RF.

DV ~ 30 km/s. small change. small modulation.

Next: 150 ms He3 puff. repeat +90 phase. 150 ms on/off modulation.

Nov 18 2009 05:07:01:383PM 1091118035 Yijun Lin Early disruption.

End of run.

Physics Operator Comments

Nov 18 2009 07:29:23:730AM Steve Wolfe
Beginning setup for Wednesday, 18-Nov-2009 MP#583 MC flow drive SL: Y. Lin PO: wolfe Load from 1091113036 According to the run plan we're going to do a current scan in USN; I thought we were supposed to do H-mode today, but that's later. Seg2: Change pg2 puff from 75 to 100msec (.2 to .3sec) Note Argon puff (pg1) is 125msec, as specified. Verify shot is setup for 600kA, 8e19, tf=-141667Amp->5.1T, fairly late divert Remove leftover pg5 waveform on wire 19, as well as amhd waveform Change title to "0.6MA, 5.1T Upper Null" Build Seg (just for fun) Seg1: PG4 from 36 to 25msec Note: rcur=2000 Br_0=.0005 ic_ef4u=-1300 pg3 short 80V puff, tailing off; leave for now. Load at 18-Nov-2009 07:29:09.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done

Nov 18 2009 09:07:45:497AM 1091118001 Steve Wolfe
Shot#1: Trying to start on run plan, without D-port for today; it's not called for until part 3 today, anyhow. 600kA,5.1T USN shot loaded. plasma to 1.7sec, marfing late. Looks like some kind of injection at 1.24sec takes a bite out of current. RF at 3MW Next: pg4 from 25 to 23msec

Nov 18 2009 09:19:29:527AM 1091118002 Steve Wolfe
Shot#2: pg4 from 25 to 23msec, no seg 2 changes. plasma to 1.3sec, looks like the injection got us this time, getting lots of hash on halpha earlier too. marfe at .4 to .5sec. I think the "hash" is the marfe moving up and down on inner wall. Ugly discharge. Next: drop pg4 again, otherwise?

Nov 18 2009 09:29:24:520AM 1091118003 Steve Wolfe
Shot#3: pg4 from 23 to 21msec,go to 800kA plasma full length, some runaways early, dropped pg4 too far? Still getting a big marfe at 1.2sec, I think inner gap is too small, but it may be an injection setting it off as rf steps in power. Next: raise pg4 back to 23msec

Nov 18 2009 09:42:28:227AM 1091118004 Steve Wolfe
Shot#4: pg4 from 21 to 23msec, still 800kA plasma full length, no runaways, marfe/injection a bit later around 1.4sec although dalpha does rise a little before that. Next: raise pg4 from 23 to 24msec, other?

Nov 18 2009 09:56:03:773AM 1091118005 Steve Wolfe
Shot#5: pg4 from 23 to 24msec, same current; they're seeing unexpected time history on the rotation, need to change rf around, get more data. plasma full length, no runaways, marfe at 1.37sec rf waveform 2:3:2:3:2, wmhd doesn't follow rf steps, but neuts sort of do, second half lower than first; HeII light is decreasing through pulse. Next: pg4 to 25msec

Nov 18 2009 10:11:07:350AM 1091118006 Steve Wolfe
Shot#6: pg4 from 24 to 25msec. Same seg2, change rf phasing. plasma full length, late marfe no runaways. next: raise current to 1MA

Nov 18 2009 10:20:39:197AM 1091118007 Steve Wolfe
Shot#7: raise current to 1MA, no seg1 change plasma full length, no runaways, no marfe next: pg4 up a smidge

Nov 18 2009 10:34:19:150AM 1091118008 Steve Wolfe
Shot#8: pg4 from 25 to 27msec, no seg2 changes plasma full length, some runaways early, no marfe (in flattop) Next: raise pg4 a bit more, on to 1.2MA?

Nov 18 2009 10:53:00:523AM 1091118009 Steve Wolfe
Shot#9: pg4 from 27 to 29msec, 1.2MA; no change to pf current limits yet. plasma disrupts at 1.51sec, just into rampdown. Some injections start at 1.2sec, possible current rail on oh1, ef3 density starts up at 1.45sec, looks like we're losing the inner gap. Next: raise oh1 to 30kA, ef3 to 15kA; drop pg4 to 27msec

Nov 18 2009 11:06:21:180AM 1091118010 Steve Wolfe
Shot#10: pg4 from 29 to 27msec, 1.2MA; raise limits on oh1 to 30kA, ef3 to 15kA; drop pg4 to 27msec plasma full length. No runaways, no marfe. EF1L is still railed at 5kA; can't raise that. Otherwise ok. next: No changes, rf will try dipole phasing

Nov 18 2009 11:17:07:273AM 1091118011 Steve Wolfe
Shot#11: No changes, rf will try dipole phasing plasma full length, runaways early, no marfe in flattop Next: pg4 back to 30msec Import seg3 from 1091113006 seg2, start setting up next shot pg3 from 75 to 100msec; shot seems to be 800kA, 8e19, which would be his first condition, I guess. remove bogus traces in v17-32. Not sure what's supposed to be different from the ones based on #36, but this is the one he asked for. Ready when he is

Nov 18 2009 11:37:33:477AM 1091118012 Steve Wolfe
Shot#12: pg4 from 27 to 30msec, current to 1.35MA, IC_EF4 from 2000 to 2500 current limits on all OH's to 35kA. plasma to 1.6sec, very small early runaways, nothing rails but the ef1's q95=2.8 in flattop, not sure why it disrupted. Next: play with clearin and rxu,rxl in rampdown, reduce pg4

Nov 18 2009 11:50:43:650AM 1091118013 Steve Wolfe
Shot#13: pg4 from 30 to 27msec, play with clearin ef4 in rampdown, reduce pg4 Raise second Ip gain step to make less of a jump at 0.5sec. Getting a granularity warning, tried moving the gain step but it's still there. Load anyway, we'll be going to a different seg next anyway, I think. Lot's of runaways, disrupted early, .527sec, Move on to 1MA, nl04=0.6e20 (not bothering with seg3)

Nov 18 2009 12:26:57:133PM 1091118014 Steve Wolfe
Shot#14: Import seg2 from 1091118008 (back to 1MA, old gains), change nl04 to 0.6e20 pg4 from 27msec to 29msec Delay for computer prob. pcdaqeng1 again plasma with runaways, disrupts in rampdown at 1.67sec, maybe a locked mode in rampdown. Next: increase pg4, maybe increase He3 puff some as well

Nov 18 2009 12:39:47:697PM 1091118015 Steve Wolfe
Shot#15: increase pg4 from 29 to 32msec, increase He3 puff to 150ms keep nl04 program up during rampdown plasma full length, still runaways; here we go on the runaway train. Next: raise seg1 pg3 puff, 0.8e20

Nov 18 2009 12:51:06:680PM 1091118016 Steve Wolfe
Shot#16: increase pg4 from 32 to 34msec, raise seg1 pg3 puff, nl04 from 0.6 to 0.8e20 plasma full length, with runaways, no marfe. next: ic_ef4U from -1300 to -1285

Nov 18 2009 01:19:07:493PM 1091118018 Steve Wolfe
Shot#18: delay nl04=1e20 to 0.4sec (from .29), raise flattop to 1.2e20 from 0.54sec ic_ef4u back to -1300, rcur at 0.02sec from .63 to .60m plasma to 1.4sec, no runaways, marfe after .6sec, Dalpha grows thoughout pulse Next: nl04 to 0.4e20 (or as low as it will get after that)

Nov 18 2009 01:28:26:150PM 1091118019 Steve Wolfe
Shot#19: nl04 to 0.4e20. No change to startup. fizzle. One disruption too many? Back off on pg4 and try again, leaving the rcur programming in place.

Nov 18 2009 01:44:06:493PM 1091118020 Steve Wolfe
Shot#20: pg4 from 34 to 30msec; back down pg3 in seg1 while I'm at it. nl04 at 0.4e20. plasma to 1.65sec, no runaway, no marfe. nl04 dropping to 5e19, no gas puff from pg3 after 0.18sec so this is running off the wall (and the He3 puff). Next: repeat, with Argon increased to 160msec

Nov 18 2009 01:58:26:477PM 1091118021 Steve Wolfe
Shot#21: pg1 (argon) increased from 125 to 160msec. reduce nl04 point at 0.1sec from .5 to .4e20; also rampdown point to .4e20. leave startup alone. Plasma with runaways. Disrupts at 1.63sec again. nl04 still between .45 and .6sec, with a small gas puff around .6sec, then nothing until rampdown. The increase in nl04 comes when the rf comes on. Probably needs more pg4 to quench the runways; nl04 at 0.02 is well below 5e18 Next: pg4 back to 33msec , go to LSN (finally!)

Nov 18 2009 02:14:06:307PM 1091118022 Steve Wolfe
Shot#22: pg4 back to 33msec , go to LSN import seg2 from seg3 of 1091112031. Change to 1MA, 5e19; tf to -141667. pg2 from 100 to 150msec argon from 50 to 100msec plasma full length with lots of runaways; can't kill 'em! some hesitation in current rise, stays inside as programmed, density still below the IHH value. No H-mode, maybe too low a target density. Got 5e19, pretty flat. Next: raise pg4 again, see what SL wants for plasma changes.

Nov 18 2009 02:31:00:900PM 1091118023 Steve Wolfe
Shot#23: pg4 from 33 to 36 msec add a second he3 puff at 1sec for 100msec runaway early disruption .16sec. Looks like something fell in, starting at .121 sec. The runaways were already saturating neuts/hards. Next: repeat, hope it goes away.

Nov 18 2009 02:46:39:680PM 1091118024 Steve Wolfe
Shot#24: pg4 at 36 msec second he3 puff at 1sec for 100msec Another early disruption, runaways not as bad, lasts to .27sec Looks like it's very dirty. Add a little more seg1 pg3 and try again.

Nov 18 2009 02:53:20:243PM 1091118025 Steve Wolfe
Shot#25: Add a little more seg1 pg3 and try again. fizzle. Next: ef4 to -1315A (and probably get more runaways)

Nov 18 2009 03:09:16:493PM 1091118026 Steve Wolfe
Shot#26:ef4 to -1315A Yijun will turn on E-port, in case we actually get a plasma. If this one fizzles I'll drop pg4, maybe put ef4 back to -1300. plasma full length with some runaways. No H-mode, up to 4MW. Probably target density is a little on the low side. It's still getting some early junk, but survives (this time). Next: raise nl04 to 7e19.

Nov 18 2009 03:19:38:680PM 1091118027 Steve Wolfe
Shot#27: raise nl04 to 7e19. Leave startup alone and cross fingers. plasma full length, with bad runaways. no h-mode, some dithering. maybe a short H-mode at 0.8sec? Looks like J faulted out. I expect he's going to want a repeat. Next: try putting ef4 back to -1300.

Nov 18 2009 03:36:01:900PM 1091118028 Steve Wolfe
Shot#28: ef4 from -1315 to -1300. V_ef3 at .02sec from 2550 to 2750V plasma full length,with h-modes. No runaways! Unfortunately, the H-modes are really ratty. Next: lose 2nd He3 puff, drop first to 100ms

Nov 18 2009 03:45:17:663PM 1091118029 Steve Wolfe
Shot#29: lose 2nd He3 puff, drop first to 100ms No startup change, try for two in a row. plasma full length, multiple (ratty) h-modes, small early runaways (< 5e12) If you don't stare too hard, the H-L's look like ELMs.

Nov 18 2009 03:56:45:977PM 1091118030 Steve Wolfe
Shot#30: Current to 800kA, nl04 to 8e19. No startup changes. plasma full length, H-modes (plural), runaways a little worse. At least these H-modes are long enough to see, but there are about ten of them, pretty ELM free looking.

Nov 18 2009 04:09:41:010PM 1091118031 Steve Wolfe
Shot#31: pg4 from 36 to 38msec Reload shot #10, 1.2MA USN, reduce nl04 from 0.8 to 0.5e20 plasma full length, no runaways, no h-modes, no marfes. However, the density was 8e19 instead of 5e19; no gas puff after 0.1sec, it's running that high off the walls and RF. Might come down next shot, might not.

Nov 18 2009 04:27:33:197PM 1091118032 Steve Wolfe
Shot#32: argon puff from 125 to 175msec. Otherwise repeat. Pg4 may be too high, but give it a try. plasma full length, some runaways. Modulated rf seen on dalpha, density, neuts, Wmhd, ... Between rf pulses the density gets down to the target 5e19. Next: change antenna phase. try decreasing V_OH1

Nov 18 2009 04:38:11:807PM 1091118033 Steve Wolfe
Shot#33: change antenna phase. decrease V_OH1 at .015,.020sec from 150 to 100V plasma full length, runaways a little worse than 32 Looks like only one pulse on rf and then faulted? Next: V_OH1 back where it was, raise pg4 again

Nov 18 2009 04:54:56:273PM 1091118034 Steve Wolfe
Shot#34: V_OH1 at .015,.020sec from 100 to 150V (as before). PG4 from 38 to 40msec! plasma full length, runaways down, still a few left. RF modulation still appearing on dalpha and nl04. Next: repeat plasma, rf will do something different.

Nov 18 2009 05:10:15:430PM 1091118035 Steve Wolfe
Shot#35: repeat plasma, raise He3 from 100 to 150msec short disruptive plasma, lots of runaways, big marfe. Ends at .4sec, but was in trouble all the way. Looks like something fell in during startup, between 30 and 40msec. END OF RUN.

Engineering Operator Comments

Shot Time Type Status Comment

1 08:58:14:450AM Plasma Ok

2 09:11:12:403AM Plasma Ok

3 09:24:01:773AM Plasma Ok

4 09:36:46:053AM Plasma Ok

5 09:49:27:337AM Plasma Ok

6 10:03:15:367AM Plasma Ok

7 10:17:39:447AM Plasma Ok

8 10:31:03:307AM Plasma Ok

9 10:45:26:417AM Plasma Ok

10 10:58:39:460AM Plasma Ok

11 11:13:22:023AM Plasma Ok

12 11:28:08:773AM Plasma Ok

13 11:45:10:587AM Plasma Ok

14 12:21:44:570PM Plasma Ok

15 12:34:23:493PM Plasma Ok

16 12:46:59:400PM Plasma Ok

17 12:59:41:337PM Plasma Ok

18 01:12:35:257PM Plasma Ok

19 01:25:19:650PM Plasma Ok

20 01:38:13:523PM Plasma Ok

21 01:50:52:680PM Plasma Ok

22 02:09:13:400PM Plasma Ok

23 02:23:16:243PM Plasma Ok

24 02:36:04:850PM Plasma Ok

25 02:48:55:057PM Plasma Ok

26 03:01:35:633PM Plasma Ok

27 03:14:30:460PM Plasma Ok

28 03:27:22:930PM Plasma Ok

29 03:40:10:400PM Plasma Ok

30 03:52:45:400PM Plasma Ok

31 04:05:25:117PM Plasma Ok

32 04:20:56:540PM Plasma Ok

33 04:33:42:243PM Plasma Ok

34 04:48:48:460PM Plasma Ok

35 05:04:38:837PM Plasma Ok

System Availability

Nov 18 2009 08:57:46:700AM

System Available Comment Availability
Changed Owner Description Who Can
Change
Active MHD no secured - tagged out Jun 02 2008 11:03AM (sears) Joe Snipes Active MHD Antenna sears,snipes
BES yes 7 horizontal views spread out R_maj=[0.72-0.9m], 3 cm over the tokamak midplane (beam) Jul 09 2009 05:12PM (bespam) Bill Rowan Beam Emission Spectroscopy bespam,liao,rowan
Bolometers yes 2pi (diode+foil), AXA, AXJ, WB3AX, WB4AX, LEDGE-AX working fine. MID-FOILS working fine. The LEDGE/DIV foils still need calibrations applied Aug 27 2009 09:09AM (mlreinke) Matt Reinke Bolometers hutch,mlreinke
Boronization yes Nov 13 2009 06:37AM (dekow) Jim Irby Boronization dekow,irby
CNPA no Single channel CNPA available as of 12/1707 Jun 10 2009 10:22AM (twf) Ron Parker Compact Neutral Analyzer parker
Cryopump - Upper Divertor yes Operational Nov 09 2009 09:12AM (irby) Brian LaBombard Upper Divertor Cryopump irby,labombard
CXRS yes The wide-view toroidal array was installed, spatially and absolutely calibrated. There are 7 toroidal chords intersect the beam at the major_R_range=[74.2:83.6]cm. Spatial resolution: 1.2 cm. The F-top wide-view poloidal array was installed and spatially calibrated. There are 19 chords intersect the beam at the major_R_range=[0.65:0.9.]m. Spatial resolution: 1.22 cm. Jul 09 2009 05:16PM (bespam) Bill Rowan Charge Exchange Spectroscopy bespam,blip,liao,rachmcd,rowan
D Alpha yes \ha2_bright is available; \SPECTROSCOPY::TOP.VUV.VIS_SIGNALS:MCP_VIS_SIG1 is not available Jul 01 2009 09:45AM (terry) Jim Terry Balmer Alpha Monitor irby,terry,wolfe
Dalsa yes system is aligned and operating; not yet calibrated Jul 14 2009 02:22PM (marmar) Earl Marmar Visible Bremsstrahlung marmar
Disruption Mitigation yes operational, but turned off Nov 03 2009 04:59PM (granetz) Robert 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,terry
DNB no in test mode only Nov 03 2009 05:01PM (granetz) Robert Granetz Diagnostic Neutral Beam dterry,granetz,gung
ECDC yes Nov 09 2009 09:13AM (irby) Jim Irby 2.45 GHz, 3 kW, discharge cleaning system dekow,irby,pfeiffer
FRC-ECE yes All 32 channels working and calibrated. Oct 06 2009 11:17AM (phillips) Perry Phillips Heterodyne ECE-32 channels phillips
G-Side Ratiomatic yes Gauge installed. Controller repaired. Aug 23 2009 10:36PM (toland) Brian LaBombard G-side ratiomatic ionization gauge labombard,toland
Glow Discharge no 6/10/09: Paddles meggered at 1000 v to machine ground (>300 Mohm) prior to closing the vacuum chamber. Plugs for Power Supply and Controls Unplugged and Red Tagged, Safe for In-Vessel Access Jun 10 2009 01:47PM (dekow) Jim Irby 1 kV, 5 A, glow discharge system dekow,dterry,irby
GPC yes Operational. Jul 28 2009 04:23PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPC2 yes Most channels operational. Jul 28 2009 04:23PM (hubbard) Amanda Hubbard ECE Polychromater hubbard,schmidt
GPI yes The Xpt-view, the midplane-view cameras are operational. The innerwall GPI (coupled to the fast-diodes) is available. Jul 01 2009 09:45AM (terry) Jim Terry Gas Puff Imaging terry,zweben
H/D yes poses no safety hazard for people working around the machine Jun 18 2009 01:04PM (marmar) Earl Marmar H/D Ratio marmar
HEAT yes Oct 27 2009 10:39AM (dekow) Gary Dekow - Machine Heaters - burke,dekow
Hirex Jr yes Hirex-Jr has been installed and tested Jun 17 2009 11:54AM (rice) John Rice High Resolution X-Ray ince,rice
Hirex Sr yes currently only one detector is operational, off-axis He-like argon emission Jul 14 2009 10:01AM (rice) John Rice High Resolution X-Ray ince,rice
HXR no In safe mode (high voltage turned off) May 27 2008 09:19PM (schmidt) Ron Parker Hard X-Ray Array parker,schmidt
ICRF D-Antenna yes operational at 80 MHz Jul 21 2009 04:49PM (wukitch) Steve Wukitch D-port antenna wukitch,ylin
ICRF E-Antenna yes antenna and FFT operational Jul 21 2009 04:49PM (wukitch) Steve Wukitch E-port antenna wukitch,ylin
ICRF J-Antenna yes available at 80 MHz and [0,pi,0,pi] phasing Sep 04 2009 10:01AM (wukitch) Steve Wukitch J-port antenna wukitch,ylin
Laser Blow-Off yes Requires some advance notice for laser start-up Oct 16 2009 12:46PM (g) Martin Greenwald Impurity Injection System g,nthoward
Lower Hybrid no Breaker locked and tagged out. Waveguide disassembly started. Open Waveguides have been shorted. May 28 2008 09:47AM (dterry) Ron Parker Lower Hybrid dterry,parker,wallaceg
LPI no Beam line removed May 30 2008 02:09PM (bose) Earl Marmar Lithium Pellet Injector bose,marmar
Ly-alpha yes Midplane, WB4-LY, LEDGE-LY all collecting data. WB1-LY not attached. Aug 27 2009 09:10AM (mlreinke) Matt Reinke Lyman alpha cameras labombard,mlreinke
McPherson yes Operating normally Aug 27 2009 09:10AM (mlreinke) Jim Terry VUV Spectrometer mlreinke,terry
Michelson yes Operational. Recalibrated 7/27/09. Jul 28 2009 04:22PM (hubbard) Amanda Hubbard ECE Te Profiles hubbard,schmidt
MKS yes Gauges are on. B-bottom is not operating - bad sensor head? Jul 14 2009 09:12PM (labombard) Brian LaBombard Baratron pressure gauges labombard
MLP no System is in edge lab. Version 2 drivers ready to test. Needs a student to help work on it. Jul 14 2009 09:20PM (labombard) Brian LaBombard Mirror Langmuir Probe Electronics System labombard
MSE no As of 6/10/09, MSE is calibrated & ready to go. Awaiting DNB. Jun 10 2009 10:34AM (sscott) Steve Scott Motional Stark Effect jinseok,sscott
Neutrons yes Neutron detectors are calibrated and ready to go. Voltages will be turned on prior to first plasma. Jun 10 2009 10:35AM (fiore) Catherine Fiore Neutron Detectors fiore
Neuts and Hards yes Power back on morning of 11/09 before run Nov 09 2009 09:10AM (irby) Jim Irby X-Ray/Neutron Detector at K-Hor irby
NINJA no Capillaries were tested in-vessel. Plenum has a leak and needs fixing. Jul 14 2009 09:14PM (labombard) Brian LaBombard NINJA gas puff labombard,terry
PCI yes Operational. Nov 12 2009 02:36PM (ntsujii) Miklos Porkolab Phase Contrast Imaging arai,edlund,ennever,ntsujii,porkolab
Penning Gauges yes High voltage is enabled (on during INIT, off during RECOOL). Jun 30 2009 09:42PM (labombard) Brian LaBombard Penning Ionization Gauges labombard
Plasma TV yes WIDE1, WIDE2 (chan 33), DANT, JANT and DIV are operational. Jul 01 2009 09:46AM (terry) Jim Terry Video of plasma via several cameras dekow,irby,terry,wolfe
Polarimeter no Safe for Machine Entry Sep 14 2007 12:17PM (irby) Jim Irby C-Mod Polarimeter irby
Power - Alternator Air Switch yes Checked and Operational as of 06/18/09 Jun 19 2009 08:04AM (irby) Gary Dekow feeds all the other supplies cochran,dekow,dterry,irby
Power - PEI yes Nov 13 2009 06:38AM (dekow) Gary Dekow PEI System cochran,dekow,dterry,irby
Power - TMX yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Gary Dekow Ef2s,. EFCs and A-Coils byford,cochran,dekow,dterry,irby
Power Systems yes Checked out and ready for Magnet Tests as of 06/18/09 Jun 19 2009 08:07AM (irby) Jim Irby C-Mod Magnet Supplies byford,cochran,dekow,dterry,irby
Probe Array - ISD yes Array is operational with new cPCI data system. Probe 14 has open circuit. Jul 14 2009 09:17PM (labombard) Brian Labombard Inner Lower Divertor Probe Array labombard
Probe Array - LH no LH launcher not installed. Cables are unplugged at the A-port rack. Jul 14 2009 09:16PM (labombard) Brian LaBombard Lower Hybrid Probe Array labombard
Probe Array - OSD yes Array is operational with new cPCI data system. Jul 14 2009 09:16PM (labombard) Brian LaBombard Outer Lower Divertor Probe Array labombard
Probe Array - UDIV yes Array is operational with new cPCI data system. Probe 13 has a bad cable (open). Jul 14 2009 09:17PM (labombard) Brian LaBombard Upper Divertor Probe Array labombard
Reflectometer yes Since 1091112000, 110 channel has been reinstalled. All channels are operational. Nov 12 2009 09:19AM (dominguez) Earl Marmar Reflectometer dominguez,marmar
Scanning Probe - ASP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard A-Port Scanning Probe labombard
Scanning Probe - FSP yes Probe is operational. Needs plasma conditioning. Jul 14 2009 09:18PM (labombard) Brian LaBombard F-Port Scanning Probe labombard
Scanning Probe - WASP yes System connected to A-port WASP. Needs plasma testing. Jul 14 2009 09:19PM (labombard) Brian LaBombard Inner Wall Scanning Probe labombard,nsmick
Sparker yes Sparker back in operation before 11/09 run Nov 09 2009 09:11AM (irby) Jim Irby Field Emission Preionization for C-Mod dekow,irby,parkin
TCI yes System restarted and aligned. Several chords available including NL04. Density Feedback available. Ready for plasma. Jun 18 2009 09:15AM (murray) Jim Irby Two-Color Interferometer irby,murray
TS - Core yes 2 lasers working. 15 spatial channels operational. Calibrated Oct 13 2009 07:49PM (yma) Jerry Hughes Core Thomson scattering jwhughes,yma,zhang
TS - Edge yes Operational, and calibrated. Oct 11 2009 03:01PM (jwhughes) Jerry Hughes Millimeter resolution edge Thomson scattering jwhughes,yma,zhang
Vispec no 350 and 670 nm, 4 spatial channels Nov 28 2007 09:58AM (agraf) Alex Graf Visible Spectrometer agraf
XTOMO yes Operating normally Aug 27 2009 09:10AM (mlreinke) Bob Granetz X-Ray Tomography granetz,mlreinke

Session Leader Comments
Nov 18 2009 09:06:53:310AM	1091118001	Yijun Lin	FMIT #1 will be down today. No D port. This may affect the late part of run which will needs power from D/E. Shot 1: 0.6 MA, 100 ms He3 puff. +90 degree phase. J power 4 steps. Got He monitor 0.1, several RF trips later. Rotation DV ~ 0.1 (Matt's program) < 1/6 of that seen in 0.8 MA. (Similar result as shot 1091113036). Next: run -90 degree, and maybe there is counter-Ip rotation.
Nov 18 2009 09:21:03:570AM	1091118002	Yijun Lin	Shot 2: 0.6 MA, 100 ms He3 puff. -90 degree phase. J power 4 steps. OK. No counter-Ip rotation. Very similar to shot 1. Small change, but still in Co-Ip direction. PCI saw much stronger ICW in than shot 001 (why?) Next: 0.8 MA. -90 degree.
Nov 18 2009 09:34:28:633AM	1091118003	Yijun Lin	0.8 MA, 100 ms He3 puff. -90 degree phase. J power 4 steps. Rotation going counter after 1.2 sec. (no apparent change in mode conversion. Is it plasma density changing?) Next: repeat.
Nov 18 2009 09:48:20:553AM	1091118004	Yijun Lin	0.8 MA, 100 ms He3 puff. -90 degree phase. J power 4 steps. Rotation was going up until 1.05 sec, then slow down and to counter at higher power. (2 shots in a row, this is likely real). Next: Run modulated RF power (1.6 MW and 2.6 MW, and see whether this bizarre behavior can be repeated).
Nov 18 2009 10:00:49:727AM	1091118005	Yijun Lin	0.8 MA, 100 ms He3 puff. -90 degree phase. J power modulated. Rotation was going up until 1.2 sec, then going down. Maybe it is the decrease of He3 in plasma. Next: 4 step J power, +90 degree. Comparison to shot 4.
Nov 18 2009 10:13:21:790AM	1091118006	Yijun Lin	0.8 MA, 100 ms He3 puff. +90 degree phase. J power 4 steps (comparison vs. shot 4) Rotation was going up until 1.34 sec, a MARFE killed the rotation. (Peak DV about the same as shot 4, but rotation goes down in shot 4 after 1 sec). Next: 4 step J power, +90 degree. 1 MA.
Nov 18 2009 10:25:07:820AM	1091118007	Yijun Lin	1.0 MA, 100 ms He3 puff. +90 degree phase. J power 4 steps Rotation was going up until 1.4 sec. reasonable following RF power steps. Peak dV ~ 52 km/s. Next: 4 step J power, -90 degree, 1 MA.
Nov 18 2009 10:37:09:477AM	1091118008	Yijun Lin	1.0 MA, 100 ms He3 puff. -90 degree phase. J power 4 steps Rotation was going up until 1.4 sec. reasonable following RF power steps, but clearly smaller than +90 phase. Peak dV ~ 30 km/s. Next: 4 step J power, -90 degree, 1.2 MA.
Nov 18 2009 10:52:35:103AM	1091118009	Yijun Lin	1.2 MA, 100 ms He3 puff. -90 degree phase. J power 4 steps Rotation was going up, peak at 1.1 sec, then goes down. Similar to shot 4 (also at -90 degree phase). there must be something about -90 degree phase. Peak dV ~ 34 km/s. Next: 4 step J power, +90 degree, 1.2 MA.
Nov 18 2009 11:18:21:243AM	1091118011	Yijun Lin	1.2 MA, 100 ms He3 puff. 180 dipole degree phase. J power 4 steps Good rotation. Peak dV ~ 65 km/s. Similar to shot 10. Consistent to previous result. Next: 1.35 MA. +90 phase.
Nov 18 2009 11:36:04:947AM	1091118012	Yijun Lin	1.35 MA, 100 ms He3 puff. +90 dipole degree phase. J power 4 steps Good rotation. Peak dV ~ 60 km/s. Slightly lower than in shot 10. Next: repeat. 1.35 MA. -90 phase.
Nov 18 2009 11:53:08:447AM	1091118013	Yijun Lin	early disruption. Next: density scan. 1 MA, nl04 0.6, +90 phase
Nov 18 2009 12:28:52:227PM	1091118014	Yijun Lin	1 MA, 100 ms He3 puff. +90 dipole degree phase. J power 2.6 MW nl04 = 0.6e20 m^-2. No HIREX data. Gate valve was closed due to disruption. Next: repeat. Increase He3 puff to 150 ms (the level seems to be decreasing shot by shot since shot 10).
Nov 18 2009 01:00:12:960PM	1091118015	Yijun Lin	1 MA, 150 ms He3 puff. +90 dipole degree phase. J power 2.6 MW nl04 = 0.6e20 m^-2. good rotation data. DV 60 km/s @ 0.8 sec, Peak DV 80 km/s @ 1.35 sec. No PCI data this shot. Next: nl04 -> 0.8e20 m^-2
Nov 18 2009 12:59:27:557PM	1091118016	Yijun Lin	1 MA, 150 ms He3 puff. +90 dipole degree phase. J power 2.6 MW nl04 = 0.8e20 m^-2. good rotation data. Peak DV 60 km/s @ 0.8 sec. 62 km/s@ 1.3 sec Next: nl04 -> 1.0e20 m^-2
Nov 18 2009 01:07:25:680PM	1091118017	Yijun Lin	1 MA, 150 ms He3 puff. +90 dipole degree phase. J power 2.6 MW nl04 = 1.0e20 m^-2. good rotation data. Peak DV 37 km/s @ 0.8 sec. 34 km/s@ 1.3 sec, MARFE 0.8-1 sec, slowed rotation. the rotation is definite slower this shot. Next: nl04 -> 1.2e20 m^-2
Nov 18 2009 01:20:34:727PM	1091118018	Yijun Lin	1 MA, 150 ms He3 puff. +90 dipole degree phase. J power 2.6 MW nl04 = 1.2e20 m^-2. good rotation data. Peak DV 20 km/s @ 0.8 sec. 11 km/s@ 1.3 sec, the rotation is definite much slower this shot. he3 signal is much higher, but PCI shows similar location of Mode conversion (~ R = 66 cm) So the density dependence is real. Higher density, less efficient. Next: nl04 -> 0.4e20 m^-2
Nov 18 2009 01:41:03:930PM	1091118019	Yijun Lin	fizzle.
Nov 18 2009 01:44:17:710PM	1091118020	Yijun Lin	1 MA, 150 ms He3 puff. +90 dipole degree phase. J power 2.6 MW nl04 = 0.52e20 m^-2 (asked for 0.4) good rotation data. Peak DV 74 km/s @ 0.8 sec. 126 km/s@ 1.3 sec, Next: repeat, and the density will be lower.
Nov 18 2009 02:01:31:227PM	1091118021	Yijun Lin	1 MA, 150 ms He3 puff. +90 dipole degree phase. J power 2.6 MW nl04 = 0.48e20 m^-2 (asked for 0.4) good rotation data. Peak DV 80 km/s @ 0.8 sec. 100 km/s@ 1.1 sec. (density will not go lower due to degassing when the RF is on.) Next: LSN. 1 MA, nl04 0.5, 5.1 T, 150 ms He3.
Nov 18 2009 02:20:12:790PM	1091118022	Yijun Lin	1 MA, 150 ms He3 puff. +90 dipole degree phase. J power ramp-up nl04 = 0.5e20 m^-2 good rotation data. Peak DV 65 km/s @ 0.8 sec. Ti way up. Next: repeat. with constant J power to compare with shot 21. Add 100 ms He3 at 1 sec.
Nov 18 2009 02:25:38:197PM	1091118023	Yijun Lin	early disruption.
Nov 18 2009 02:38:45:993PM	1091118024	Yijun Lin	early disruption. two in a row.
Nov 18 2009 02:57:56:197PM	1091118025	Yijun Lin	fizzle. Next: since we are losing shots, I will add E port power and see the effect in H-mode.
Nov 18 2009 03:15:23:663PM	1091118026	Yijun Lin	1 MA, 150 ms He3 puff at 0.2, 100 ms He3 puff at 1.0 sec. +90 dipole degree phase. J power + E power. nl04 = 0.5e20 m^-2 good rotation data. No H-mode. No rotation change from E. Peak DV 60 km/s @ 1.2 sec with J on. Next: repeat. raise density. Run J constant. plus E port to get H-mode.
Nov 18 2009 03:37:35:103PM	1091118028	Yijun Lin	1 MA, 150 ms He3 puff at 0.2, 100 ms He3 puff at 1.0 sec. +90 dipole degree phase. J power + E power. nl04 = 0.7e20 m^-2, short H-modes. Not good. He3 too much? Not much in PCI either. Next: Only puff He3 once, for 100 ms, from 0.2 sec
Nov 18 2009 03:47:57:070PM	1091118029	Yijun Lin	1 MA, 100 ms He3 puff at 0.2 s. +90 dipole degree phase. J power + E power. nl04 = 0.7e20 m^-2, still shorty H-modes. DV ~ 40 km/s. Most likely just density effect. Next: 0.8 MA, nl 0.8, try to see whether we can get nice long H-mode.
Nov 18 2009 04:04:31:960PM	1091118030	Yijun Lin	0.8 MA, 100 ms He3 puff at 0.2 s. +90 dipole degree phase. J power + E power. nl04 = 0.8e20 m^-2, many shorty H-modes. DV ~ 40 km/s. close to the intrinsic scaling (or just density scaling?). Decide to punt H-mode part. It won't work. Next: 1.2 MA, USN, nl = 0.5e20 m^-2, J 2.6 MW.
Nov 18 2009 04:15:52:837PM	1091118031	Yijun Lin	1.2 MA, 100 ms He3 puff at 0.2 s. +90 dipole degree phase. J power ask for nl 0.5e20, got 0.8 DV ~ 50 km/s. About what I expected. Next: repeat. RF modulated 100 ms on, 100 ms off.
Nov 18 2009 04:31:16:727PM	1091118032	Yijun Lin	1.2 MA, 100 ms He3 puff at 0.2 s. +90 dipole degree phase. J power ask for nl 0.5e20, got 0.8e20 during RF. DV ~ 50 km/s. Similar to 31. Good rotation modulation. Next: repeat. -90 phase.
Nov 18 2009 04:40:52:773PM	1091118033	Yijun Lin	J4 faulted out early. Next: lower power to 2.4 MW, repeat -90 degree phase.
Nov 18 2009 04:53:31:853PM	1091118034	Yijun Lin	1.2 MA, 100 ms He3 puff at 0.2 s. -90 dipole degree phase. J power ask for nl 0.5e20, got 0.8e20 during RF. DV ~ 30 km/s. small change. small modulation. Next: 150 ms He3 puff. repeat +90 phase. 150 ms on/off modulation.
Nov 18 2009 05:07:01:383PM	1091118035	Yijun Lin	Early disruption. End of run.

Physics Operator Comments
Nov 18 2009 07:29:23:730AM		Steve Wolfe	Beginning setup for Wednesday, 18-Nov-2009 MP#583 MC flow drive SL: Y. Lin PO: wolfe Load from 1091113036 According to the run plan we're going to do a current scan in USN; I thought we were supposed to do H-mode today, but that's later. Seg2: Change pg2 puff from 75 to 100msec (.2 to .3sec) Note Argon puff (pg1) is 125msec, as specified. Verify shot is setup for 600kA, 8e19, tf=-141667Amp->5.1T, fairly late divert Remove leftover pg5 waveform on wire 19, as well as amhd waveform Change title to "0.6MA, 5.1T Upper Null" Build Seg (just for fun) Seg1: PG4 from 36 to 25msec Note: rcur=2000 Br_0=.0005 ic_ef4u=-1300 pg3 short 80V puff, tailing off; leave for now. Load at 18-Nov-2009 07:29:09.00 Open tree /home/wolfe/pcs_scratch -1 Open tree done
Nov 18 2009 09:07:45:497AM	1091118001	Steve Wolfe	Shot#1: Trying to start on run plan, without D-port for today; it's not called for until part 3 today, anyhow. 600kA,5.1T USN shot loaded. plasma to 1.7sec, marfing late. Looks like some kind of injection at 1.24sec takes a bite out of current. RF at 3MW Next: pg4 from 25 to 23msec
Nov 18 2009 09:19:29:527AM	1091118002	Steve Wolfe	Shot#2: pg4 from 25 to 23msec, no seg 2 changes. plasma to 1.3sec, looks like the injection got us this time, getting lots of hash on halpha earlier too. marfe at .4 to .5sec. I think the "hash" is the marfe moving up and down on inner wall. Ugly discharge. Next: drop pg4 again, otherwise?
Nov 18 2009 09:29:24:520AM	1091118003	Steve Wolfe	Shot#3: pg4 from 23 to 21msec,go to 800kA plasma full length, some runaways early, dropped pg4 too far? Still getting a big marfe at 1.2sec, I think inner gap is too small, but it may be an injection setting it off as rf steps in power. Next: raise pg4 back to 23msec
Nov 18 2009 09:42:28:227AM	1091118004	Steve Wolfe	Shot#4: pg4 from 21 to 23msec, still 800kA plasma full length, no runaways, marfe/injection a bit later around 1.4sec although dalpha does rise a little before that. Next: raise pg4 from 23 to 24msec, other?
Nov 18 2009 09:56:03:773AM	1091118005	Steve Wolfe	Shot#5: pg4 from 23 to 24msec, same current; they're seeing unexpected time history on the rotation, need to change rf around, get more data. plasma full length, no runaways, marfe at 1.37sec rf waveform 2:3:2:3:2, wmhd doesn't follow rf steps, but neuts sort of do, second half lower than first; HeII light is decreasing through pulse. Next: pg4 to 25msec
Nov 18 2009 10:11:07:350AM	1091118006	Steve Wolfe	Shot#6: pg4 from 24 to 25msec. Same seg2, change rf phasing. plasma full length, late marfe no runaways. next: raise current to 1MA
Nov 18 2009 10:20:39:197AM	1091118007	Steve Wolfe	Shot#7: raise current to 1MA, no seg1 change plasma full length, no runaways, no marfe next: pg4 up a smidge
Nov 18 2009 10:34:19:150AM	1091118008	Steve Wolfe	Shot#8: pg4 from 25 to 27msec, no seg2 changes plasma full length, some runaways early, no marfe (in flattop) Next: raise pg4 a bit more, on to 1.2MA?
Nov 18 2009 10:53:00:523AM	1091118009	Steve Wolfe	Shot#9: pg4 from 27 to 29msec, 1.2MA; no change to pf current limits yet. plasma disrupts at 1.51sec, just into rampdown. Some injections start at 1.2sec, possible current rail on oh1, ef3 density starts up at 1.45sec, looks like we're losing the inner gap. Next: raise oh1 to 30kA, ef3 to 15kA; drop pg4 to 27msec
Nov 18 2009 11:06:21:180AM	1091118010	Steve Wolfe	Shot#10: pg4 from 29 to 27msec, 1.2MA; raise limits on oh1 to 30kA, ef3 to 15kA; drop pg4 to 27msec plasma full length. No runaways, no marfe. EF1L is still railed at 5kA; can't raise that. Otherwise ok. next: No changes, rf will try dipole phasing
Nov 18 2009 11:17:07:273AM	1091118011	Steve Wolfe	Shot#11: No changes, rf will try dipole phasing plasma full length, runaways early, no marfe in flattop Next: pg4 back to 30msec Import seg3 from 1091113006 seg2, start setting up next shot pg3 from 75 to 100msec; shot seems to be 800kA, 8e19, which would be his first condition, I guess. remove bogus traces in v17-32. Not sure what's supposed to be different from the ones based on #36, but this is the one he asked for. Ready when he is
Nov 18 2009 11:37:33:477AM	1091118012	Steve Wolfe	Shot#12: pg4 from 27 to 30msec, current to 1.35MA, IC_EF4 from 2000 to 2500 current limits on all OH's to 35kA. plasma to 1.6sec, very small early runaways, nothing rails but the ef1's q95=2.8 in flattop, not sure why it disrupted. Next: play with clearin and rxu,rxl in rampdown, reduce pg4
Nov 18 2009 11:50:43:650AM	1091118013	Steve Wolfe	Shot#13: pg4 from 30 to 27msec, play with clearin ef4 in rampdown, reduce pg4 Raise second Ip gain step to make less of a jump at 0.5sec. Getting a granularity warning, tried moving the gain step but it's still there. Load anyway, we'll be going to a different seg next anyway, I think. Lot's of runaways, disrupted early, .527sec, Move on to 1MA, nl04=0.6e20 (not bothering with seg3)
Nov 18 2009 12:26:57:133PM	1091118014	Steve Wolfe	Shot#14: Import seg2 from 1091118008 (back to 1MA, old gains), change nl04 to 0.6e20 pg4 from 27msec to 29msec Delay for computer prob. pcdaqeng1 again plasma with runaways, disrupts in rampdown at 1.67sec, maybe a locked mode in rampdown. Next: increase pg4, maybe increase He3 puff some as well
Nov 18 2009 12:39:47:697PM	1091118015	Steve Wolfe	Shot#15: increase pg4 from 29 to 32msec, increase He3 puff to 150ms keep nl04 program up during rampdown plasma full length, still runaways; here we go on the runaway train. Next: raise seg1 pg3 puff, 0.8e20
Nov 18 2009 12:51:06:680PM	1091118016	Steve Wolfe	Shot#16: increase pg4 from 32 to 34msec, raise seg1 pg3 puff, nl04 from 0.6 to 0.8e20 plasma full length, with runaways, no marfe. next: ic_ef4U from -1300 to -1285
Nov 18 2009 01:19:07:493PM	1091118018	Steve Wolfe	Shot#18: delay nl04=1e20 to 0.4sec (from .29), raise flattop to 1.2e20 from 0.54sec ic_ef4u back to -1300, rcur at 0.02sec from .63 to .60m plasma to 1.4sec, no runaways, marfe after .6sec, Dalpha grows thoughout pulse Next: nl04 to 0.4e20 (or as low as it will get after that)
Nov 18 2009 01:28:26:150PM	1091118019	Steve Wolfe	Shot#19: nl04 to 0.4e20. No change to startup. fizzle. One disruption too many? Back off on pg4 and try again, leaving the rcur programming in place.
Nov 18 2009 01:44:06:493PM	1091118020	Steve Wolfe	Shot#20: pg4 from 34 to 30msec; back down pg3 in seg1 while I'm at it. nl04 at 0.4e20. plasma to 1.65sec, no runaway, no marfe. nl04 dropping to 5e19, no gas puff from pg3 after 0.18sec so this is running off the wall (and the He3 puff). Next: repeat, with Argon increased to 160msec
Nov 18 2009 01:58:26:477PM	1091118021	Steve Wolfe	Shot#21: pg1 (argon) increased from 125 to 160msec. reduce nl04 point at 0.1sec from .5 to .4e20; also rampdown point to .4e20. leave startup alone. Plasma with runaways. Disrupts at 1.63sec again. nl04 still between .45 and .6sec, with a small gas puff around .6sec, then nothing until rampdown. The increase in nl04 comes when the rf comes on. Probably needs more pg4 to quench the runways; nl04 at 0.02 is well below 5e18 Next: pg4 back to 33msec , go to LSN (finally!)
Nov 18 2009 02:14:06:307PM	1091118022	Steve Wolfe	Shot#22: pg4 back to 33msec , go to LSN import seg2 from seg3 of 1091112031. Change to 1MA, 5e19; tf to -141667. pg2 from 100 to 150msec argon from 50 to 100msec plasma full length with lots of runaways; can't kill 'em! some hesitation in current rise, stays inside as programmed, density still below the IHH value. No H-mode, maybe too low a target density. Got 5e19, pretty flat. Next: raise pg4 again, see what SL wants for plasma changes.
Nov 18 2009 02:31:00:900PM	1091118023	Steve Wolfe	Shot#23: pg4 from 33 to 36 msec add a second he3 puff at 1sec for 100msec runaway early disruption .16sec. Looks like something fell in, starting at .121 sec. The runaways were already saturating neuts/hards. Next: repeat, hope it goes away.
Nov 18 2009 02:46:39:680PM	1091118024	Steve Wolfe	Shot#24: pg4 at 36 msec second he3 puff at 1sec for 100msec Another early disruption, runaways not as bad, lasts to .27sec Looks like it's very dirty. Add a little more seg1 pg3 and try again.
Nov 18 2009 02:53:20:243PM	1091118025	Steve Wolfe	Shot#25: Add a little more seg1 pg3 and try again. fizzle. Next: ef4 to -1315A (and probably get more runaways)
Nov 18 2009 03:09:16:493PM	1091118026	Steve Wolfe	Shot#26:ef4 to -1315A Yijun will turn on E-port, in case we actually get a plasma. If this one fizzles I'll drop pg4, maybe put ef4 back to -1300. plasma full length with some runaways. No H-mode, up to 4MW. Probably target density is a little on the low side. It's still getting some early junk, but survives (this time). Next: raise nl04 to 7e19.
Nov 18 2009 03:19:38:680PM	1091118027	Steve Wolfe	Shot#27: raise nl04 to 7e19. Leave startup alone and cross fingers. plasma full length, with bad runaways. no h-mode, some dithering. maybe a short H-mode at 0.8sec? Looks like J faulted out. I expect he's going to want a repeat. Next: try putting ef4 back to -1300.
Nov 18 2009 03:36:01:900PM	1091118028	Steve Wolfe	Shot#28: ef4 from -1315 to -1300. V_ef3 at .02sec from 2550 to 2750V plasma full length,with h-modes. No runaways! Unfortunately, the H-modes are really ratty. Next: lose 2nd He3 puff, drop first to 100ms
Nov 18 2009 03:45:17:663PM	1091118029	Steve Wolfe	Shot#29: lose 2nd He3 puff, drop first to 100ms No startup change, try for two in a row. plasma full length, multiple (ratty) h-modes, small early runaways (< 5e12) If you don't stare too hard, the H-L's look like ELMs.
Nov 18 2009 03:56:45:977PM	1091118030	Steve Wolfe	Shot#30: Current to 800kA, nl04 to 8e19. No startup changes. plasma full length, H-modes (plural), runaways a little worse. At least these H-modes are long enough to see, but there are about ten of them, pretty ELM free looking.
Nov 18 2009 04:09:41:010PM	1091118031	Steve Wolfe	Shot#31: pg4 from 36 to 38msec Reload shot #10, 1.2MA USN, reduce nl04 from 0.8 to 0.5e20 plasma full length, no runaways, no h-modes, no marfes. However, the density was 8e19 instead of 5e19; no gas puff after 0.1sec, it's running that high off the walls and RF. Might come down next shot, might not.
Nov 18 2009 04:27:33:197PM	1091118032	Steve Wolfe	Shot#32: argon puff from 125 to 175msec. Otherwise repeat. Pg4 may be too high, but give it a try. plasma full length, some runaways. Modulated rf seen on dalpha, density, neuts, Wmhd, ... Between rf pulses the density gets down to the target 5e19. Next: change antenna phase. try decreasing V_OH1
Nov 18 2009 04:38:11:807PM	1091118033	Steve Wolfe	Shot#33: change antenna phase. decrease V_OH1 at .015,.020sec from 150 to 100V plasma full length, runaways a little worse than 32 Looks like only one pulse on rf and then faulted? Next: V_OH1 back where it was, raise pg4 again
Nov 18 2009 04:54:56:273PM	1091118034	Steve Wolfe	Shot#34: V_OH1 at .015,.020sec from 100 to 150V (as before). PG4 from 38 to 40msec! plasma full length, runaways down, still a few left. RF modulation still appearing on dalpha and nl04. Next: repeat plasma, rf will do something different.
Nov 18 2009 05:10:15:430PM	1091118035	Steve Wolfe	Shot#35: repeat plasma, raise He3 from 100 to 150msec short disruptive plasma, lots of runaways, big marfe. Ends at .4sec, but was in trouble all the way. Looks like something fell in during startup, between 30 and 40msec. END OF RUN.

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:58:14:450AM	Plasma	Ok
2	09:11:12:403AM	Plasma	Ok
3	09:24:01:773AM	Plasma	Ok
4	09:36:46:053AM	Plasma	Ok
5	09:49:27:337AM	Plasma	Ok
6	10:03:15:367AM	Plasma	Ok
7	10:17:39:447AM	Plasma	Ok
8	10:31:03:307AM	Plasma	Ok
9	10:45:26:417AM	Plasma	Ok
10	10:58:39:460AM	Plasma	Ok
11	11:13:22:023AM	Plasma	Ok
12	11:28:08:773AM	Plasma	Ok
13	11:45:10:587AM	Plasma	Ok
14	12:21:44:570PM	Plasma	Ok
15	12:34:23:493PM	Plasma	Ok
16	12:46:59:400PM	Plasma	Ok
17	12:59:41:337PM	Plasma	Ok
18	01:12:35:257PM	Plasma	Ok
19	01:25:19:650PM	Plasma	Ok
20	01:38:13:523PM	Plasma	Ok
21	01:50:52:680PM	Plasma	Ok
22	02:09:13:400PM	Plasma	Ok
23	02:23:16:243PM	Plasma	Ok
24	02:36:04:850PM	Plasma	Ok
25	02:48:55:057PM	Plasma	Ok
26	03:01:35:633PM	Plasma	Ok
27	03:14:30:460PM	Plasma	Ok
28	03:27:22:930PM	Plasma	Ok
29	03:40:10:400PM	Plasma	Ok
30	03:52:45:400PM	Plasma	Ok
31	04:05:25:117PM	Plasma	Ok
32	04:20:56:540PM	Plasma	Ok
33	04:33:42:243PM	Plasma	Ok
34	04:48:48:460PM	Plasma	Ok
35	05:04:38:837PM	Plasma	Ok