Alcator C-Mod Run 1030711 Information

Miniproposals

Miniproposal: 343a

Date Filed: 6/24/2003

Title: Study of ICRF Mode Conversion Poloidal Flow Drive

First Author: Yijun Lin

Session Leader: Yijun Lin (shots 1-43)

Operators
Session leader(s):	Yijun Lin
Physics operator(s):	Bill Rowan
Engineering operator(s):	Gary Dekow,Bill Parkin,Bill Cochran

Engineering Operator Run Comment
Purpose: MP 343A, Study of ICRF Mode Confersion Poloidal Flow Drive/Lin/

Session Leader Plans

Physics Operators Plans

Session Leader Summaries

Entered: Jul 7 2004 03:49:34:023PM

Author: Yijun Lin

------------------------------------------------------
Run summary:

About 20 shots were dedicated to obtain a somewhat desired species mixture to get
mode conversion at the He3-H hybrid layer. After shot 22, hints of correlated flow
is seen, especially in shot 29, 30, 31, and 32. In these shots, the mode conversion
layer is at about R = 0.75 m (mapped to the lower field side) while the X-ray
spectrometer is also viewing at similar location. Later in the run, the flow seemed
to disappear, presumablly because of the variation of special mixture. A B field scan
is done in shot 40 and 41. Shot 41 possibly sees a flow shear when B field is
scanned. We tried to run the fields in shot 42 (5.5 T) and 43 (5.4 T)
at the points with max flow velocity as of shot 41, but the result is inconlusive.

Unfortunately, there is only one spectrometer (#4) working in this run.
If the correlation of the RF power and velocity is real, we won't know whether
it is poloidal flow or toroidal flow.

In general, the experimental result is encouraging.

Physics Operator Summaries

Entered: Jul 7 2004 04:37:18:787PM

Author: Bill Rowan

Physop Summary for Friday, July 11, 2003. 1030711.

Purpose: MP 343A, Study of ICRF Mode Confersion Poloidal Flow Drive

SL: Lin
PO: Rowan
EO: Cochran, Dekow, Parkin

ENGINEERING SETUP------------------------------------------------------

NOTE>> ECDC overnight in HYDRODGEN p = 2e-4 Torr <
60 C Bake Overnight

Run Starts at 8:00 AM and ends at 6:00 PM

Power Systems as for 1030710017

A coils in same configuration as on 1030710

Gas setup:

Fill B-Top with 6 psi of D2 hybrid enabled (PG4)
Fill B-side lower with 1 psi Argon Hybrid Disabled (PG1)
Fill B-side upper with 16 psi He3 Hybrid Disabled (PG2)
Fill C-side with 30 psi H2 Hybrid enabled (PG3)

ICRF: All transmitters in Run On by 7:30 AM

Enable the ECE, VUV and DNB gate-valves, assuming no vacuum problems

Z-Bolo shutter should be open for run

Results----------------------------------------------------------------
The machine ran reasonably well. There were some problems with
volt-second consumption during the first few shots. These were corrected
by changing the plasma parameters and increasing the limit on OH2L

The initial shots were inner wall limited. The latter part of the run
was conducted with an SNL equilibrium. There was one outer wall
limited shot during the transition to the SNL equilibrium.

Absence of the ratiomatic for this run may have caused some problems in
that some of the fizzles might have been avoided with shot by shot
monitoring of the pressure prior to breakdown.

He3 was used in this run. The He3 content of the plasma may have been
scanned although there was no diagnostic available for this other than
Zeff and plasma density

During the run, argon puffs were added in addition to the usual one at
0.3 s. By the end of the run, there were 3 puffs, each of 40 ms
duration with no deleterious effect on the plasma.

Score card-------------------------------------------------------------
plasmas 31
early disruptions 4
fizzles 8

total 43

Details----------------------------------------------------------------

To start, load shot 1030710026. This has the same equilibrium as the shot requested by the SL. Unlike 1030710017, this shot contains both the final settings from run 1030710 for He3 control as well as the H2 control. Also contains an attempt to remove the current divot that we have been seeing in the late part of the startup.

Make mods in this shot as requested by session leader
Bt = 5.0 T
Ip = 1.0 MA
nl04 = 1.0e+20
Leave argon disabled for the first shot. Then set for 35 to 40 ms as suggested by John.

Overnight ECDC in H2. Ending at 6am.

EO: Cochran
SL: Lin
PO: Rowan

001. Plasma. Disruption during rampdown. Just at the beginning

Next shot. Enable argon for the next shot. B-side lower. PG1. Approximately 40 ms

002. Plasma. Disruption at 0.4s
Large increase in the soft x-rays. Assume that something fell in. Will just go again.

Next shot. No pcs changes

003. Plasma. Disruption at the same time.

Next shot.
Reduced the rate of rise of IP
Reduced the rate of rise of nl_04
Disable B-side lower (Argon puff)

004. Plasma. Disruption at 1.3 s

Next shot. Increased the limits on OH2_L.
ZCUR changed to 0 from -=1.5 cm

005. Plasma. Disruption during the rampdown at 1.6s

Next shot:
Add the argon back in.
Reduced the current to 800 kA

006. Plasma. Rampdown okay.

Next shot.
Increased argon puff from 35 ms to 40 ms at request of SL
Increase the prepuff by 2 ms from 27 ms by 29 ms

007. Plasma. Rampdown okay

Next shot.
Increased the prepuff by 2 ms from 29 to 31 ms

008. Plasma.

EO: Gary Dekow

Next shot. No PCS changes

009. Plasma

Next shot. Increased Rcur by 2 cm

010. Plasma. Disruption at 0.5s

Next shot.
Rcur decreased by 1 cm
Cleanin increaed by 1 cm

011. Fizzle.

Next shot. No changes. Assume this is the post disruption fizzle.

012. Plasma. Full length

Next shot. Reloaded clearin, rcur, clearin from shot 1030710013

013. Plasma. Full length. SNL at last.

Next shot. Increased nl_04 to increase the He3

014. Fizzle.

Next shot.
Reduced prepuff by 2 ms to 29 ms

015. Plasma. Full length.

Next shot.
Added a maintenance level to PG2 for He3.
2ms pulse at 100V starting at 300 ms with a 35V back porch

016. Fizzle

Next shot.
Increased IC_EF4 from -1290 to -1280

017. Plasma.

Next shot.
Increased the He3

018. Fizzle
Seems to be in an alternating mode; plasma/fizzle

Next shot
Decrease IC_EF4 from -1280 to -1300
Reduce prefill by 2 ms to 27 ms

019. Plasma.

Next shot.
Increased the He3 again.

020. Plasma.

Next shot.
Increased the He3 again.
Increased the TF to 5.4T.

021. Plasma.

Next shot.
Increased the He3 again.

022. Plasma

Next shot.
Increased the TF to 5.6 T

023. Fizzle.

Next shot.
Increase the prefill by 2 ms to 29 ms

024. Plasma.

Next shot.
Moved the He3 pulse to 0.5 s

025. Fizzle

Next shot.
Increase the prefill by 2 ms to 31 ms

026. Plasma.

EO: Parkin
Increase the prefill by 2 ms to 33 ms

027. Plasma

Next shot.
Increase Ar from 40 ms to 45 ms

028. Fizzle

Next shot.
Decrease prefill by 2 ms to 31 ms

029. Plasma

Next shot.
Added a second argon puff at 600 ms

030. Plasma

Next shot.
No pcs changes

031. Plasma

Next shot.
No pcs changes.

032. Plasma

Next shot.
No pcs changes

033. Plasma

Next shot.
No pcs changes

034. Plasma

Next shot.
No pcs changes.

035. Plasma

Next shot.
No pcs changes

036. Plasma

Next shot.
Reduced He3 pulse

037. Plasma

Next shot.
No pcs changes

038. Fizzle

Next shot.
Reduce the prefill by 2 ms to 29 ms

039. Plasma

Next shot.
Bfield ramp. 5.2 at 0.5 s to 5.8 at 1.5s

040. Plasma

Next shot.
Added another 40 ms argon puff at 1s

041. Plasma

Next shot.
Bt = 5.5T

042. Plasma.

Next shot.
Bt = 5.4 T

043. Plasma

Next shot.

Session Leader Comments

Jul 11 2003 06:14:12:533PM Yijun Lin ------------------------------------------------------
Run summary:

About 20 shots were dedicated to obtain a somewhat desired species mixture to get
mode conversion at the He3-H hybrid layer. After shot 22, hints of correlated flow
is seen, especially in shot 29, 30, 31, and 32. In these shots, the mode conversion
layer is at about R = 0.75 m (mapped to the lower field side) while the X-ray
spectrometer is also viewing at similar location. Later in the run, the flow seemed
to disappear, presumablly because of the variation of special mixture. A B field scan
is done in shot 40 and 41. Shot 41 possibly sees a flow shear when B field is
scanned. We tried to run the fields in shot 42 (5.5 T) and 43 (5.4 T)
at the points with max flow velocity as of shot 41, but the result is inconlusive.

Unfortunately, there is only one spectrometer (#4) working in this run.
If the correlation of the RF power and velocity is real, we won't know whether
it is poloidal flow or toroidal flow.

In general, the experimental result is encouraging.

Jul 11 2003 08:21:27:230AM 1030711002 Yijun Lin disrupted before RF.

Jul 11 2003 08:57:45:283AM 1030711002 Yijun Lin Shot 001:
Plasma: Bt = 5.0 T, Ip = 1.0 MA, nl04 = 1.0 e20 m^-2, inner wall limited.
Disrupted at 1.4 sec.
H/D ~ 2.3-1.7
RF: modulated at 3.4 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimate from FRCECE): unclear
PCI: No MC waves observed.
No argon. Operator error.

Next repeat.

Jul 11 2003 08:45:09:643AM 1030711003 Yijun Lin disrupted before RF.

Jul 11 2003 09:27:24:490AM 1030711004 Yijun Lin Plasma: Bt = 5.0 T, Ip = 1.0 MA, nl04 = 1.0 e20 m^-2, inner wall limited,
disrupted at 1.33 sec
H/D ~ 1.5
RF: modulated at 3.5 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimate from FRCECE): at flux surface R ~ 0.75 m (uncertain)

PCI: No MC wave(s) observed

No argon. Delibrately disabled to get plasma shot.

Jul 11 2003 09:40:01:837AM 1030711005 Yijun Lin Plasma: Bt = 5.0 T, Ip = 1.0 MA, nl04 = 1.0 e20 m^-2, inner wall limited,
H/D ~ 1.4
RF: modulated at 3.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimate from FRCECE): uncertain

PCI: No MC wave(s) observed.

No argon. Delibrately disabled to get plasma shot.

RF is ``cooling'' plasma by outgasing.

Next try 800 kA and enable Argon.
------

Jul 11 2003 09:53:23:690AM 1030711006 Yijun Lin Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, inner wall limited
H/D ~ 1.5
RF: modulated at 3. MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimate from FRCECE): unclear

Too little argon. Next: more argon.

Jul 11 2003 05:09:20:393PM 1030711007 Yijun Lin Shot 007
Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, inner wall limited
H/D ~ 1.5
RF: modulated at 3. MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimate from FRCECE): unclear

Jul 11 2003 01:34:30:200PM 1030711008 Yijun Lin Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, inner wall limited
H/D ~ 2
RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimate from FRCECE): ?
Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
No rf correlated flow observed.
No data from spectrometer #2.
Next shot: same density, Lower single null.

Want to do He3 scan to move the MC layer.

Jul 11 2003 01:34:37:153PM 1030711009 Yijun Lin Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, inner wall limited
H/D > 2
RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimate from FRCECE): ?
Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
No rf correlated flow observed).
No data from spectrometer #2 (?).

Next shot: Lower SN

Jul 11 2003 10:39:29:470AM 1030711010 Yijun Lin Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
disrupted at 0.55 sec.

Jul 11 2003 10:48:17:173AM 1030711011 Yijun Lin fizzle

Jul 11 2003 11:10:18:997AM 1030711012 Yijun Lin Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 3 ?
RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimate from FRCECE): unclear (R = 0.75 cm ??)
Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
No rf correlated flow observed).
No data from spectrometer #2 (?).

Jul 11 2003 05:09:56:160PM 1030711013 Yijun Lin ------
shot 013
Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 3
RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimate from FRCECE): unclear. Amanda saw a hint of MC heating
at R ~ 0.81 - 0.83 m.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
No rf correlated flow observed).
No data from spectrometer #2 (?).

Next Raise density requirement.

Jul 11 2003 11:30:50:030AM 1030711014 Yijun Lin fizzle

Jul 11 2003 01:34:50:090PM 1030711015 Yijun Lin Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 3
RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimate from FRCECE): unclear.
From GPC: the MC layer may be at R > 0.8 m.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
No rf correlated flow observed).
No data from spectrometer #2 (?).

Next raise the He3 maintenance level.

Jul 11 2003 05:10:21:880PM 1030711016 Yijun Lin fizzle

Jul 11 2003 01:34:55:780PM 1030711017 Yijun Lin Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimate from FRCECE): R ~ 0.8 m

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
No rf correlated flow observed).
No data from spectrometer #2 (?).

Estimated plasma mixture for this shot: 48% H, 12% D, 20% He3.

Add a little more argon for next shot. More He3 for next shot.

Jul 11 2003 12:26:02:513PM 1030711018 Yijun Lin fizzle

Jul 11 2003 05:10:49:427PM 1030711019 Yijun Lin Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

More MC heating seen.

MC layer (estimate from FRCECE): R >= 0.8 m

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
No rf correlated flow observed).
No data from spectrometer #2 (?).

More He3 next shot.

Jul 11 2003 01:35:08:780PM 1030711020 Yijun Lin Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

More MC heating seen.

MC layer (estimate from FRCECE): R >= 0.8 m

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
No rf correlated flow observed).
No data from spectrometer #2 (?).

More He3 next shot.

Jul 11 2003 01:35:22:140PM 1030711021 Yijun Lin -----------------------------------
shot 021:
Plasma: Bt = 5.4 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

More MC heating seen.

MC layer (estimate from FRCECE): R ~ 0.79 m

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
No rf correlated flow observed).
No data from spectrometer #2 (?).

More He3 next shot.

Jul 11 2003 01:34:14:763PM 1030711022 Yijun Lin Plasma: Bt = 5.4 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

More MC heating seen.

MC layer (estimate from FRCECE): R ~ 0.79 m. SImilar location.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
No rf correlated flow observed).
No data from spectrometer #2 (?).

More He3 next shot. Move B field to 5.6 T.

Jul 11 2003 01:33:55:250PM 1030711023 Yijun Lin fizzle

Jul 11 2003 02:24:40:443PM 1030711024 Yijun Lin shot 024:
Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimated from FRCECE): R ~ 0.75 m.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)

Delay He3, to reduce MARFE.

Jul 11 2003 01:58:53:077PM 1030711025 Yijun Lin fizzle

Jul 11 2003 02:24:34:773PM 1030711026 Yijun Lin Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec)

MC layer (estimated from FRCECE): R ~ 0.75 m (?).

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
About twice big velocity than previous shots seen.
Possible correlation with RF power. (RF driven?)

Next Modulate RF at 200 ms on, 200 ms off to get more rotation data.

Jul 11 2003 02:48:51:913PM 1030711027 Yijun Lin Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 2.3 MW, 200 ms on, 200 ms off. (0.5 to 1.4 sec)

MC layer (estimated from FRCECE): R ~ 0.75 m.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
No clear correlation with RF.

Jul 11 2003 02:40:00:193PM 1030711028 Yijun Lin fizzle

Jul 11 2003 03:15:22:747PM 1030711029 Yijun Lin Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 2.3 MW, 200 ms on, 200 ms off. (0.5 to 1.4 sec)

MC layer (estimated from FRCECE): R ~ 0.75 m.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
Possible flow drive? (He3 puff at 0.5 sec) (Possible correlation between
0.7 to 1.0 sec).

Next do 2nd Ar puff at 0.6 sec.

Jul 11 2003 03:18:09:843PM 1030711030 Yijun Lin Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 2.3 MW, 200 ms on, 200 ms off. (0.5 to 1.4 sec)

MC layer (estimated from FRCECE): R ~ 0.75 m.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
data good up to 1.1 sec. (Hee puff at 0.5 sec)
Possible correlation of the rotation with RF power.
Next shot: raise RF power to see whether the rotation goes higher.

Jul 11 2003 05:08:46:410PM 1030711031 Yijun Lin shot 031:
Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 4 MW, (got similar level as 30). 200 ms on, 200 ms off. (0.5 to 1.4 sec)

MC layer (estimated from FRCECE): R ~ 0.75 m.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
He3 puff at 0.5 sec. The velocity is smaller. (Still a hint of
correlation).

Jul 11 2003 03:42:28:297PM 1030711032 Yijun Lin Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 4 MW, (got similar level as 30). 200 ms on, 200 ms off. (0.5 to 1.4 sec)

MC layer (estimated from FRCECE): R ~ 0.75 m.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
He3 puff at 0.5 sec. POssible correlation between 0.8 to 1.2 sec.

Next Move RF power earlier by 100 ms to see whether the rotation can follow.

Jul 11 2003 03:52:24:707PM 1030711033 Yijun Lin Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 3 MW (got less than 2 MW), 200 ms on, 200 ms off. (0.5 to 1.4 sec)

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
He3 puff at 0.5 sec. No clear indication of any RF related flow.

Jul 11 2003 04:11:47:167PM 1030711034 Yijun Lin Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 3 MW, 200 ms on, 200 ms off. (0.5 to 1.4 sec)

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
He3 puff at 0.5 sec. Possible correlation (0.8- 1.4 sec)
Next: Delay RF to start 0.7 sec to get long time background rotation
without RF.

Jul 11 2003 04:19:40:667PM 1030711035 Yijun Lin Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 3 MW (got less 2 MW), RF on 0.7-0.9 sec and 1.1 - 1.3 sec.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
He3 puff at 0.5 sec. No correlated flow seen. (Need higher power to see the flow?)

Jul 11 2003 04:36:26:253PM 1030711036 Yijun Lin Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 3 MW, RF on 0.7-0.9 sec and 1.1 - 1.3 sec.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
He3 puff at 0.5 sec. No clearindication. Suspect the He3 level too high. Next shot
try to reduce the He3 level.

Jul 11 2003 05:08:14:313PM 1030711037 Yijun Lin Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 3 MW (got about 2 MW), RF on 0.7-0.9 sec and 1.1 - 1.3 sec.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
He3 puff at 0.5 sec. No clear indication.
(somehow, I lost the possible flow).
Next shot: repeat. See if the RF goes better.

Jul 11 2003 04:56:13:523PM 1030711038 Yijun Lin fizzle

Jul 11 2003 05:19:14:083PM 1030711039 Yijun Lin shot 039:
Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: modulated at 3 MW, RF on 0.7-0.9 sec and 1.1 - 1.3 sec.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
He3 puff at 0.5 sec. No clear indication.

Next Ramp B field from 5.2 T to 5.8 T to see where the MC layer exactly.
-------

Jul 11 2003 05:49:53:520PM 1030711040 Yijun Lin Plasma: Bt = 5.2-5.8 T ramp, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: 2.5 MW, continuous, No modulation.
Check if there is any correlation of the rotation with the B field.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
A weak trend of the velocity with B field. Not yet know why.

Next repeat. One more argon puff at 1.0s. (0.3 s, 0.6 s). Hope the RF will stay on.
-------

Jul 11 2003 05:50:12:770PM 1030711041 Yijun Lin Plasma: Bt = 5.2-5.8 T ramp, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: 2.5 MW, continuous, No modulation.
Check if there is any correlation of the rotation with the B field.

Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
flow shear detected at t = 0.9 and 1.1 sec ? (B at 5.4 to 5.5 T) Possible.
Next run Bt at 5.5 T, to see whether we can see the velocity again
also ramp RF power.

Jul 11 2003 05:58:26:817PM 1030711042 Yijun Lin --------------------------------------
shot 042:
Plasma: Bt = 5.5 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: 1 MW -- 4 MW, continuous, No modulation. 0.7 - 1.4 sec.
Check if there is rotation in correlation with the RF power.
Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
Hard to say whether there is effect on the flow (if there is any).

Next: try 5.4 T.

Jul 11 2003 06:13:54:690PM 1030711043 Yijun Lin --------------------------------------------------
shot 043:
Plasma: Bt = 5.4 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null.
H/D ~ 4
RF: 1 MW -- 4 MW, continuous, No modulation. 0.7 - 1.4 sec.
Check if there is rotation in correlation with the RF power.
Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m)
Flow may be in different direction as shot 42, but it is inclusive.

End of run

Physics Operator Comments

Jul 11 2003 07:39:48:817AM Bill Rowan Engineering Setup for Friday, July 11, 2003. 1030711.

Purpose: MP 343A, Study of ICRF Mode Confersion Poloidal Flow Drive

SL: Lin
PO: Rowan

ENGINEERING SETUP

NOTE>> ECDC overnight in HYDRODGEN p = 2e-4 Torr <
60 C Bake Overnight

Run Starts at 8:00 AM and ends at 6:00 PM

Power Systems as for 1030710017

A coils in same configuration as on 1030710

Gas setup:

Fill B-Top with 6 psi of D2 hybrid enabled (PG4)
Fill B-side lower with 1 psi Argon Hybrid Disabled (PG1)
Fill B-side upper with 16 psi He3 Hybrid Disabled (PG2)
Fill C-side with 30 psi H2 Hybrid enabled (PG3)

ICRF: All transmitters in Run On by 7:30 AM

Enable the ECE, VUV and DNB gate-valves, assuming no vacuum problems

Z-Bolo shutter should be open for run

To start, load shot 1030710026. This has the same equilibrium as the shot requested by the SL. Unlike 1030710017, this shot contains both the final settings from run 1030710 for He3 control as well as the H2 control. Also contains an attempt to remove the current divot that we have been seeing in the late part of the startup.

Make mods in this shot as requested by session leader
Bt = 5.0 T
Ip = 1.0 MA
nl04 = 1.0e+20
Leave argon disabled for the first shot. Then set for 35 to 40 ms as suggested by John.

Overnight ECDC in H2. Ending at 6am.

EO: Cochran

Jul 11 2003 08:15:07:663AM 1030711001 Bill Rowan 001. Plasma. Disruption during rampdown. Just at the beginning

Jul 11 2003 08:15:21:540AM 1030711001 Bill Rowan

Next shot. Enable argon for the next shot. B-side lower. PG1. Approximately 40 ms

Jul 11 2003 08:22:01:043AM 1030711002 Bill Rowan
002. Plasma. Disruption at 0.4s

Jul 11 2003 08:29:56:317AM 1030711002 Bill Rowan
Large increase in the soft x-rays before the disruption. Assume that something fell in. Will just go again.

Next shot. No pcs changes

Jul 11 2003 08:49:50:917AM 1030711003 Bill Rowan 003. Plasma. Disruption at the same time.

Next shot.
Reduced the rate of rise of IP
Reduced the rate of rise of nl_04

Jul 11 2003 08:52:24:850AM 1030711003 Bill Rowan Disable B-side lower (Argon puff)

Jul 11 2003 09:23:48:403AM 1030711004 Bill Rowan 004. Plasma. Disruption at 1.3 s

Next shot. Increased the limits on OH2_L.
ZCUR changed to 0 from -1.5 cm

Jul 11 2003 09:35:32:940AM 1030711005 Bill Rowan
005. Plasma. Disruption during the rampdown at 1.6s

Next shot:
Add the argon back in.
Reduced the current to 800 kA

Jul 11 2003 09:48:07:923AM 1030711006 Bill Rowan 006. Plasma. Rampdown okay.

Next shot.
Increased argon puff from 35 ms to 40 ms at request of SL
Increase the prepuff by 2 ms from 27 ms by 29 ms

Jul 11 2003 09:59:10:957AM 1030711007 Bill Rowan 007. Plasma. Rampdown okay

Next shot.
Increased the prepuff by 2 ms from 29 to 31 ms

Jul 11 2003 10:22:32:940AM 1030711008 Bill Rowan 008. Plasma.

EO: Gary Dekow

Next shot. No PCS changes

Jul 11 2003 10:23:49:610AM 1030711009 Bill Rowan 009. Plasma

Next shot. Increased Rcur by 2 cm

Jul 11 2003 10:53:24:920AM 1030711010 Bill Rowan 010. Plasma. Disruption at 0.5s

Next shot.
Rcur decreased by 1 cm
Clearin increased by 1 cm

Jul 11 2003 10:48:35:237AM 1030711011 Bill Rowan 011. Fizzle.

Next shot. No changes. Assume this is the post disruption fizzle.

Jul 11 2003 11:13:19:090AM 1030711012 Bill Rowan 012. Plasma. Full length

Next shot. Reloaded clearin, rcur, clearin from shot 1030710013

Jul 11 2003 11:24:03:607AM 1030711013 Bill Rowan 013. Plasma. Full length. SNL at last.

Next shot. Increased nl_04 to increase the He3

Jul 11 2003 11:39:55:403AM 1030711014 Bill Rowan 014. Fizzle.

Next shot.
Reduced prepuff by 2 ms to 29 ms

Jul 11 2003 11:50:57:937AM 1030711015 Bill Rowan 015. Plasma. Full length.

Next shot.
Added a maintenance level to PG2 for He3.
2ms pulse at 100V starting at 300 ms with a 35V back porch

Jul 11 2003 11:59:49:390AM 1030711016 Bill Rowan 016. Fizzle

Next shot.
Increased IC_EF4 from -1290 to -1280

Jul 11 2003 12:19:13:513PM 1030711017 Bill Rowan 017. Plasma.

Next shot.
Increased the He3

Jul 11 2003 12:34:00:013PM 1030711018 Bill Rowan 18. Fizzle
Seems to be in an alternating mode; plasma/fizzle

Next shot
Decrease IC_EF4 from -1280 to -1300
Reduce prefill by 2 ms to 27 ms

Jul 11 2003 12:47:20:437PM 1030711019 Bill Rowan 019. Plasma.

Next shot.
Increased the He3 again.

Jul 11 2003 01:00:03:390PM 1030711020 Bill Rowan 020. Plasma.

Next shot.
Increased the He3 again.
Increased the TF to 5.4T.

Jul 11 2003 01:10:52:623PM 1030711021 Bill Rowan 021. Plasma.

Next shot.
Increased the He3 again.

Jul 11 2003 01:28:21:373PM 1030711022 Bill Rowan 022. Plasma

Next shot.
Increased the TF to 5.6 T

Jul 11 2003 01:36:34:920PM 1030711023 Bill Rowan 023. Fizzle.

Next shot.
Increase the prefill by 2 ms to 29 ms

Jul 11 2003 01:48:54:280PM 1030711024 Bill Rowan 024. Plasma.

Next shot.
Moved the He3 pulse to 0.5 s

Jul 11 2003 02:32:35:803PM 1030711027 Bill Rowan 027. Plasma

Next shot.
Increase Ar from 40 ms to 45 ms

Jul 11 2003 02:41:54:133PM 1030711028 Bill Rowan 028. Fizzle

Next shot.
Decrease prefill by 2 ms to 31 ms

Jul 11 2003 03:02:30:097PM 1030711029 Bill Rowan 029. Plasma

Next shot.
Added a second argon puff at 600 ms

Jul 11 2003 03:13:43:023PM 1030711030 Bill Rowan 030. Plasma

Next shot.
No pcs changes

Jul 11 2003 03:27:57:817PM 1030711031 Bill Rowan 031. Plasma

Next shot.
No pcs changes.

Jul 11 2003 03:44:09:597PM 1030711033 Bill Rowan 032. Plasma

Next shot.
No pcs changes

Jul 11 2003 03:54:12:930PM 1030711033 Bill Rowan 033. Plasma

Next shot.
No pcs changes

Jul 11 2003 04:08:03:923PM 1030711034 Bill Rowan 034. Plasma

Next shot.
No pcs changes.

Jul 11 2003 04:24:34:863PM 1030711035 Bill Rowan 035. Plasma

Next shot.
No pcs changes

Jul 11 2003 04:36:14:220PM 1030711036 Bill Rowan 036. Plasma

Next shot.
Reduced He3 pulse

Jul 11 2003 04:51:40:953PM 1030711037 Bill Rowan 037. Plasma

Next shot.
No pcs changes

Jul 11 2003 04:57:36:400PM 1030711038 Bill Rowan 038. Fizzle

Next shot.
Reduce the prefill by 2 ms to 29 ms

Jul 11 2003 05:03:44:023PM 1030711038 Bill Rowan 038. Fizzle

Next shot.
Reduce the prefill by 2 ms to 29 ms

Jul 11 2003 05:20:36:587PM 1030711039 Bill Rowan 039. Plasma

Next shot.
Bfield ramp. 5.2 at 0.5 s to 5.8 at 1.5s

Jul 11 2003 05:33:19:660PM 1030711040 Bill Rowan 040. Plasma

Next shot.
Added another 40 ms argon puff at 1s

Jul 11 2003 05:46:00:667PM 1030711041 Bill Rowan 041. Plasma

Next shot.
Bt = 5.5T

Jul 11 2003 05:58:20:067PM 1030711042 Bill Rowan 042. Plasma.

Next shot.
Bt = 5.4 T

Jul 11 2003 06:11:20:590PM 1030711043 Bill Rowan

Engineering Operator Comments

Shot Time Type Status Comment

1 08:00:54:970AM Plasma Ok

2 08:15:54:530AM Plasma Bad OH1 Self powered circuit fired

3 08:42:26:160AM Plasma Ok

4 09:09:51:133AM Plasma Ok

5 09:26:04:283AM Plasma Ok

6 09:39:29:083AM Plasma Ok

7 09:53:10:143AM Plasma Ok

8 10:05:56:707AM Plasma Ok

9 10:19:35:707AM Plasma Ok

10 10:32:44:080AM Plasma Ok

11 10:46:04:923AM Plasma Ok

12 10:59:39:123AM Plasma Ok

13 11:13:39:670AM Plasma Ok

14 11:27:00:950AM Plasma Ok

15 11:40:46:077AM Plasma Ok

16 11:53:57:403AM Plasma Ok

17 12:06:49:030PM Plasma Ok

18 12:23:59:153PM Plasma Ok

19 12:37:07:827PM Plasma Ok

20 12:50:00:700PM Plasma Ok

21 01:03:10:043PM Plasma Ok

22 01:16:27:607PM Plasma Ok

23 01:29:38:280PM Plasma Ok

24 01:42:27:280PM Plasma Ok

25 01:55:18:170PM Plasma Ok

26 02:08:28:170PM Plasma Ok

27 02:22:17:097PM Plasma Ok

28 02:35:24:183PM Plasma Ok

29 02:48:26:320PM Plasma Ok

30 03:03:34:330PM Plasma Ok

31 03:16:54:437PM Plasma Ok

32 03:29:58:867PM Plasma Ok

33 03:43:22:893PM Plasma Ok

34 03:57:15:717PM Plasma Ok

35 04:12:40:293PM Plasma Ok

36 04:25:38:287PM Plasma Ok

37 04:39:16:353PM Plasma Ok

38 04:53:15:783PM Plasma Ok

39 05:08:19:250PM Plasma Ok

40 05:24:49:783PM Plasma Ok

41 05:37:52:933PM Plasma Ok

42 05:51:21:350PM Plasma Ok

43 06:06:35:427PM Plasma Ok

Session Leader Comments
Jul 11 2003 06:14:12:533PM		Yijun Lin	------------------------------------------------------ Run summary: About 20 shots were dedicated to obtain a somewhat desired species mixture to get mode conversion at the He3-H hybrid layer. After shot 22, hints of correlated flow is seen, especially in shot 29, 30, 31, and 32. In these shots, the mode conversion layer is at about R = 0.75 m (mapped to the lower field side) while the X-ray spectrometer is also viewing at similar location. Later in the run, the flow seemed to disappear, presumablly because of the variation of special mixture. A B field scan is done in shot 40 and 41. Shot 41 possibly sees a flow shear when B field is scanned. We tried to run the fields in shot 42 (5.5 T) and 43 (5.4 T) at the points with max flow velocity as of shot 41, but the result is inconlusive. Unfortunately, there is only one spectrometer (#4) working in this run. If the correlation of the RF power and velocity is real, we won't know whether it is poloidal flow or toroidal flow. In general, the experimental result is encouraging.
Jul 11 2003 08:21:27:230AM	1030711002	Yijun Lin	disrupted before RF.
Jul 11 2003 08:57:45:283AM	1030711002	Yijun Lin	Shot 001: Plasma: Bt = 5.0 T, Ip = 1.0 MA, nl04 = 1.0 e20 m^-2, inner wall limited. Disrupted at 1.4 sec. H/D ~ 2.3-1.7 RF: modulated at 3.4 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimate from FRCECE): unclear PCI: No MC waves observed. No argon. Operator error. Next repeat.
Jul 11 2003 08:45:09:643AM	1030711003	Yijun Lin	disrupted before RF.
Jul 11 2003 09:27:24:490AM	1030711004	Yijun Lin	Plasma: Bt = 5.0 T, Ip = 1.0 MA, nl04 = 1.0 e20 m^-2, inner wall limited, disrupted at 1.33 sec H/D ~ 1.5 RF: modulated at 3.5 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimate from FRCECE): at flux surface R ~ 0.75 m (uncertain) PCI: No MC wave(s) observed No argon. Delibrately disabled to get plasma shot.
Jul 11 2003 09:40:01:837AM	1030711005	Yijun Lin	Plasma: Bt = 5.0 T, Ip = 1.0 MA, nl04 = 1.0 e20 m^-2, inner wall limited, H/D ~ 1.4 RF: modulated at 3.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimate from FRCECE): uncertain PCI: No MC wave(s) observed. No argon. Delibrately disabled to get plasma shot. RF is ``cooling'' plasma by outgasing. Next try 800 kA and enable Argon. ------
Jul 11 2003 09:53:23:690AM	1030711006	Yijun Lin	Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, inner wall limited H/D ~ 1.5 RF: modulated at 3. MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimate from FRCECE): unclear Too little argon. Next: more argon.
Jul 11 2003 05:09:20:393PM	1030711007	Yijun Lin	Shot 007 Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, inner wall limited H/D ~ 1.5 RF: modulated at 3. MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimate from FRCECE): unclear
Jul 11 2003 01:34:30:200PM	1030711008	Yijun Lin	Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, inner wall limited H/D ~ 2 RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimate from FRCECE): ? Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) No rf correlated flow observed. No data from spectrometer #2. Next shot: same density, Lower single null. Want to do He3 scan to move the MC layer.
Jul 11 2003 01:34:37:153PM	1030711009	Yijun Lin	Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, inner wall limited H/D > 2 RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimate from FRCECE): ? Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) No rf correlated flow observed). No data from spectrometer #2 (?). Next shot: Lower SN
Jul 11 2003 10:39:29:470AM	1030711010	Yijun Lin	Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. disrupted at 0.55 sec.
Jul 11 2003 10:48:17:173AM	1030711011	Yijun Lin	fizzle
Jul 11 2003 11:10:18:997AM	1030711012	Yijun Lin	Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 3 ? RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimate from FRCECE): unclear (R = 0.75 cm ??) Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) No rf correlated flow observed). No data from spectrometer #2 (?).
Jul 11 2003 05:09:56:160PM	1030711013	Yijun Lin	------ shot 013 Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 3 RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimate from FRCECE): unclear. Amanda saw a hint of MC heating at R ~ 0.81 - 0.83 m. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) No rf correlated flow observed). No data from spectrometer #2 (?). Next Raise density requirement.
Jul 11 2003 11:30:50:030AM	1030711014	Yijun Lin	fizzle
Jul 11 2003 01:34:50:090PM	1030711015	Yijun Lin	Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 3 RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimate from FRCECE): unclear. From GPC: the MC layer may be at R > 0.8 m. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) No rf correlated flow observed). No data from spectrometer #2 (?). Next raise the He3 maintenance level.
Jul 11 2003 05:10:21:880PM	1030711016	Yijun Lin	fizzle
Jul 11 2003 01:34:55:780PM	1030711017	Yijun Lin	Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimate from FRCECE): R ~ 0.8 m Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) No rf correlated flow observed). No data from spectrometer #2 (?). Estimated plasma mixture for this shot: 48% H, 12% D, 20% He3. Add a little more argon for next shot. More He3 for next shot.
Jul 11 2003 12:26:02:513PM	1030711018	Yijun Lin	fizzle
Jul 11 2003 05:10:49:427PM	1030711019	Yijun Lin	Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) More MC heating seen. MC layer (estimate from FRCECE): R >= 0.8 m Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) No rf correlated flow observed). No data from spectrometer #2 (?). More He3 next shot.
Jul 11 2003 01:35:08:780PM	1030711020	Yijun Lin	Plasma: Bt = 5.0 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) More MC heating seen. MC layer (estimate from FRCECE): R >= 0.8 m Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) No rf correlated flow observed). No data from spectrometer #2 (?). More He3 next shot.
Jul 11 2003 01:35:22:140PM	1030711021	Yijun Lin	----------------------------------- shot 021: Plasma: Bt = 5.4 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) More MC heating seen. MC layer (estimate from FRCECE): R ~ 0.79 m Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) No rf correlated flow observed). No data from spectrometer #2 (?). More He3 next shot.
Jul 11 2003 01:34:14:763PM	1030711022	Yijun Lin	Plasma: Bt = 5.4 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) More MC heating seen. MC layer (estimate from FRCECE): R ~ 0.79 m. SImilar location. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) No rf correlated flow observed). No data from spectrometer #2 (?). More He3 next shot. Move B field to 5.6 T.
Jul 11 2003 01:33:55:250PM	1030711023	Yijun Lin	fizzle
Jul 11 2003 02:24:40:443PM	1030711024	Yijun Lin	shot 024: Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimated from FRCECE): R ~ 0.75 m. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) Delay He3, to reduce MARFE.
Jul 11 2003 01:58:53:077PM	1030711025	Yijun Lin	fizzle
Jul 11 2003 02:24:34:773PM	1030711026	Yijun Lin	Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 2.3 MW, 100 ms on, 100 ms off. (0.5 to 1.4 sec) MC layer (estimated from FRCECE): R ~ 0.75 m (?). Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) About twice big velocity than previous shots seen. Possible correlation with RF power. (RF driven?) Next Modulate RF at 200 ms on, 200 ms off to get more rotation data.
Jul 11 2003 02:48:51:913PM	1030711027	Yijun Lin	Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 2.3 MW, 200 ms on, 200 ms off. (0.5 to 1.4 sec) MC layer (estimated from FRCECE): R ~ 0.75 m. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) No clear correlation with RF.
Jul 11 2003 02:40:00:193PM	1030711028	Yijun Lin	fizzle
Jul 11 2003 03:15:22:747PM	1030711029	Yijun Lin	Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 2.3 MW, 200 ms on, 200 ms off. (0.5 to 1.4 sec) MC layer (estimated from FRCECE): R ~ 0.75 m. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) Possible flow drive? (He3 puff at 0.5 sec) (Possible correlation between 0.7 to 1.0 sec). Next do 2nd Ar puff at 0.6 sec.
Jul 11 2003 03:18:09:843PM	1030711030	Yijun Lin	Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 2.3 MW, 200 ms on, 200 ms off. (0.5 to 1.4 sec) MC layer (estimated from FRCECE): R ~ 0.75 m. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) data good up to 1.1 sec. (Hee puff at 0.5 sec) Possible correlation of the rotation with RF power. Next shot: raise RF power to see whether the rotation goes higher.
Jul 11 2003 05:08:46:410PM	1030711031	Yijun Lin	shot 031: Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 4 MW, (got similar level as 30). 200 ms on, 200 ms off. (0.5 to 1.4 sec) MC layer (estimated from FRCECE): R ~ 0.75 m. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) He3 puff at 0.5 sec. The velocity is smaller. (Still a hint of correlation).
Jul 11 2003 03:42:28:297PM	1030711032	Yijun Lin	Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 4 MW, (got similar level as 30). 200 ms on, 200 ms off. (0.5 to 1.4 sec) MC layer (estimated from FRCECE): R ~ 0.75 m. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) He3 puff at 0.5 sec. POssible correlation between 0.8 to 1.2 sec. Next Move RF power earlier by 100 ms to see whether the rotation can follow.
Jul 11 2003 03:52:24:707PM	1030711033	Yijun Lin	Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 3 MW (got less than 2 MW), 200 ms on, 200 ms off. (0.5 to 1.4 sec) Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) He3 puff at 0.5 sec. No clear indication of any RF related flow.
Jul 11 2003 04:11:47:167PM	1030711034	Yijun Lin	Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 3 MW, 200 ms on, 200 ms off. (0.5 to 1.4 sec) Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) He3 puff at 0.5 sec. Possible correlation (0.8- 1.4 sec) Next: Delay RF to start 0.7 sec to get long time background rotation without RF.
Jul 11 2003 04:19:40:667PM	1030711035	Yijun Lin	Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 3 MW (got less 2 MW), RF on 0.7-0.9 sec and 1.1 - 1.3 sec. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) He3 puff at 0.5 sec. No correlated flow seen. (Need higher power to see the flow?)
Jul 11 2003 04:36:26:253PM	1030711036	Yijun Lin	Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 3 MW, RF on 0.7-0.9 sec and 1.1 - 1.3 sec. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) He3 puff at 0.5 sec. No clearindication. Suspect the He3 level too high. Next shot try to reduce the He3 level.
Jul 11 2003 05:08:14:313PM	1030711037	Yijun Lin	Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 3 MW (got about 2 MW), RF on 0.7-0.9 sec and 1.1 - 1.3 sec. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) He3 puff at 0.5 sec. No clear indication. (somehow, I lost the possible flow). Next shot: repeat. See if the RF goes better.
Jul 11 2003 04:56:13:523PM	1030711038	Yijun Lin	fizzle
Jul 11 2003 05:19:14:083PM	1030711039	Yijun Lin	shot 039: Plasma: Bt = 5.6 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: modulated at 3 MW, RF on 0.7-0.9 sec and 1.1 - 1.3 sec. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) He3 puff at 0.5 sec. No clear indication. Next Ramp B field from 5.2 T to 5.8 T to see where the MC layer exactly. -------
Jul 11 2003 05:49:53:520PM	1030711040	Yijun Lin	Plasma: Bt = 5.2-5.8 T ramp, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: 2.5 MW, continuous, No modulation. Check if there is any correlation of the rotation with the B field. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) A weak trend of the velocity with B field. Not yet know why. Next repeat. One more argon puff at 1.0s. (0.3 s, 0.6 s). Hope the RF will stay on. -------
Jul 11 2003 05:50:12:770PM	1030711041	Yijun Lin	Plasma: Bt = 5.2-5.8 T ramp, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: 2.5 MW, continuous, No modulation. Check if there is any correlation of the rotation with the B field. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) flow shear detected at t = 0.9 and 1.1 sec ? (B at 5.4 to 5.5 T) Possible. Next run Bt at 5.5 T, to see whether we can see the velocity again also ramp RF power.
Jul 11 2003 05:58:26:817PM	1030711042	Yijun Lin	-------------------------------------- shot 042: Plasma: Bt = 5.5 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: 1 MW -- 4 MW, continuous, No modulation. 0.7 - 1.4 sec. Check if there is rotation in correlation with the RF power. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) Hard to say whether there is effect on the flow (if there is any). Next: try 5.4 T.
Jul 11 2003 06:13:54:690PM	1030711043	Yijun Lin	-------------------------------------------------- shot 043: Plasma: Bt = 5.4 T, Ip = 0.8 MA, nl04 = 1.0 e20 m^-2, lower single null. H/D ~ 4 RF: 1 MW -- 4 MW, continuous, No modulation. 0.7 - 1.4 sec. Check if there is rotation in correlation with the RF power. Rotation: Spectrometer #4 (R = 0.747 m, Z = 0.079 m) Flow may be in different direction as shot 42, but it is inclusive. End of run

Physics Operator Comments
Jul 11 2003 07:39:48:817AM		Bill Rowan	Engineering Setup for Friday, July 11, 2003. 1030711. Purpose: MP 343A, Study of ICRF Mode Confersion Poloidal Flow Drive SL: Lin PO: Rowan ENGINEERING SETUP NOTE>> ECDC overnight in HYDRODGEN p = 2e-4 Torr < 60 C Bake Overnight Run Starts at 8:00 AM and ends at 6:00 PM Power Systems as for 1030710017 A coils in same configuration as on 1030710 Gas setup: Fill B-Top with 6 psi of D2 hybrid enabled (PG4) Fill B-side lower with 1 psi Argon Hybrid Disabled (PG1) Fill B-side upper with 16 psi He3 Hybrid Disabled (PG2) Fill C-side with 30 psi H2 Hybrid enabled (PG3) ICRF: All transmitters in Run On by 7:30 AM Enable the ECE, VUV and DNB gate-valves, assuming no vacuum problems Z-Bolo shutter should be open for run To start, load shot 1030710026. This has the same equilibrium as the shot requested by the SL. Unlike 1030710017, this shot contains both the final settings from run 1030710 for He3 control as well as the H2 control. Also contains an attempt to remove the current divot that we have been seeing in the late part of the startup. Make mods in this shot as requested by session leader Bt = 5.0 T Ip = 1.0 MA nl04 = 1.0e+20 Leave argon disabled for the first shot. Then set for 35 to 40 ms as suggested by John. Overnight ECDC in H2. Ending at 6am. EO: Cochran
Jul 11 2003 08:15:07:663AM	1030711001	Bill Rowan	001. Plasma. Disruption during rampdown. Just at the beginning
Jul 11 2003 08:15:21:540AM	1030711001	Bill Rowan	Next shot. Enable argon for the next shot. B-side lower. PG1. Approximately 40 ms
Jul 11 2003 08:22:01:043AM	1030711002	Bill Rowan	002. Plasma. Disruption at 0.4s
Jul 11 2003 08:29:56:317AM	1030711002	Bill Rowan	Large increase in the soft x-rays before the disruption. Assume that something fell in. Will just go again. Next shot. No pcs changes
Jul 11 2003 08:49:50:917AM	1030711003	Bill Rowan	003. Plasma. Disruption at the same time. Next shot. Reduced the rate of rise of IP Reduced the rate of rise of nl_04
Jul 11 2003 08:52:24:850AM	1030711003	Bill Rowan	Disable B-side lower (Argon puff)
Jul 11 2003 09:23:48:403AM	1030711004	Bill Rowan	004. Plasma. Disruption at 1.3 s Next shot. Increased the limits on OH2_L. ZCUR changed to 0 from -1.5 cm
Jul 11 2003 09:35:32:940AM	1030711005	Bill Rowan	005. Plasma. Disruption during the rampdown at 1.6s Next shot: Add the argon back in. Reduced the current to 800 kA
Jul 11 2003 09:48:07:923AM	1030711006	Bill Rowan	006. Plasma. Rampdown okay. Next shot. Increased argon puff from 35 ms to 40 ms at request of SL Increase the prepuff by 2 ms from 27 ms by 29 ms
Jul 11 2003 09:59:10:957AM	1030711007	Bill Rowan	007. Plasma. Rampdown okay Next shot. Increased the prepuff by 2 ms from 29 to 31 ms
Jul 11 2003 10:22:32:940AM	1030711008	Bill Rowan	008. Plasma. EO: Gary Dekow Next shot. No PCS changes
Jul 11 2003 10:23:49:610AM	1030711009	Bill Rowan	009. Plasma Next shot. Increased Rcur by 2 cm
Jul 11 2003 10:53:24:920AM	1030711010	Bill Rowan	010. Plasma. Disruption at 0.5s Next shot. Rcur decreased by 1 cm Clearin increased by 1 cm
Jul 11 2003 10:48:35:237AM	1030711011	Bill Rowan	011. Fizzle. Next shot. No changes. Assume this is the post disruption fizzle.
Jul 11 2003 11:13:19:090AM	1030711012	Bill Rowan	012. Plasma. Full length Next shot. Reloaded clearin, rcur, clearin from shot 1030710013
Jul 11 2003 11:24:03:607AM	1030711013	Bill Rowan	013. Plasma. Full length. SNL at last. Next shot. Increased nl_04 to increase the He3
Jul 11 2003 11:39:55:403AM	1030711014	Bill Rowan	014. Fizzle. Next shot. Reduced prepuff by 2 ms to 29 ms
Jul 11 2003 11:50:57:937AM	1030711015	Bill Rowan	015. Plasma. Full length. Next shot. Added a maintenance level to PG2 for He3. 2ms pulse at 100V starting at 300 ms with a 35V back porch
Jul 11 2003 11:59:49:390AM	1030711016	Bill Rowan	016. Fizzle Next shot. Increased IC_EF4 from -1290 to -1280
Jul 11 2003 12:19:13:513PM	1030711017	Bill Rowan	017. Plasma. Next shot. Increased the He3
Jul 11 2003 12:34:00:013PM	1030711018	Bill Rowan	18. Fizzle Seems to be in an alternating mode; plasma/fizzle Next shot Decrease IC_EF4 from -1280 to -1300 Reduce prefill by 2 ms to 27 ms
Jul 11 2003 12:47:20:437PM	1030711019	Bill Rowan	019. Plasma. Next shot. Increased the He3 again.
Jul 11 2003 01:00:03:390PM	1030711020	Bill Rowan	020. Plasma. Next shot. Increased the He3 again. Increased the TF to 5.4T.
Jul 11 2003 01:10:52:623PM	1030711021	Bill Rowan	021. Plasma. Next shot. Increased the He3 again.
Jul 11 2003 01:28:21:373PM	1030711022	Bill Rowan	022. Plasma Next shot. Increased the TF to 5.6 T
Jul 11 2003 01:36:34:920PM	1030711023	Bill Rowan	023. Fizzle. Next shot. Increase the prefill by 2 ms to 29 ms
Jul 11 2003 01:48:54:280PM	1030711024	Bill Rowan	024. Plasma. Next shot. Moved the He3 pulse to 0.5 s
Jul 11 2003 02:32:35:803PM	1030711027	Bill Rowan	027. Plasma Next shot. Increase Ar from 40 ms to 45 ms
Jul 11 2003 02:41:54:133PM	1030711028	Bill Rowan	028. Fizzle Next shot. Decrease prefill by 2 ms to 31 ms
Jul 11 2003 03:02:30:097PM	1030711029	Bill Rowan	029. Plasma Next shot. Added a second argon puff at 600 ms
Jul 11 2003 03:13:43:023PM	1030711030	Bill Rowan	030. Plasma Next shot. No pcs changes
Jul 11 2003 03:27:57:817PM	1030711031	Bill Rowan	031. Plasma Next shot. No pcs changes.
Jul 11 2003 03:44:09:597PM	1030711033	Bill Rowan	032. Plasma Next shot. No pcs changes
Jul 11 2003 03:54:12:930PM	1030711033	Bill Rowan	033. Plasma Next shot. No pcs changes
Jul 11 2003 04:08:03:923PM	1030711034	Bill Rowan	034. Plasma Next shot. No pcs changes.
Jul 11 2003 04:24:34:863PM	1030711035	Bill Rowan	035. Plasma Next shot. No pcs changes
Jul 11 2003 04:36:14:220PM	1030711036	Bill Rowan	036. Plasma Next shot. Reduced He3 pulse
Jul 11 2003 04:51:40:953PM	1030711037	Bill Rowan	037. Plasma Next shot. No pcs changes
Jul 11 2003 04:57:36:400PM	1030711038	Bill Rowan	038. Fizzle Next shot. Reduce the prefill by 2 ms to 29 ms
Jul 11 2003 05:03:44:023PM	1030711038	Bill Rowan	038. Fizzle Next shot. Reduce the prefill by 2 ms to 29 ms
Jul 11 2003 05:20:36:587PM	1030711039	Bill Rowan	039. Plasma Next shot. Bfield ramp. 5.2 at 0.5 s to 5.8 at 1.5s
Jul 11 2003 05:33:19:660PM	1030711040	Bill Rowan	040. Plasma Next shot. Added another 40 ms argon puff at 1s
Jul 11 2003 05:46:00:667PM	1030711041	Bill Rowan	041. Plasma Next shot. Bt = 5.5T
Jul 11 2003 05:58:20:067PM	1030711042	Bill Rowan	042. Plasma. Next shot. Bt = 5.4 T
Jul 11 2003 06:11:20:590PM	1030711043	Bill Rowan

Engineering Operator Comments
Shot	Time	Type	Status	Comment
1	08:00:54:970AM	Plasma	Ok
2	08:15:54:530AM	Plasma	Bad	OH1 Self powered circuit fired
3	08:42:26:160AM	Plasma	Ok
4	09:09:51:133AM	Plasma	Ok
5	09:26:04:283AM	Plasma	Ok
6	09:39:29:083AM	Plasma	Ok
7	09:53:10:143AM	Plasma	Ok
8	10:05:56:707AM	Plasma	Ok
9	10:19:35:707AM	Plasma	Ok
10	10:32:44:080AM	Plasma	Ok
11	10:46:04:923AM	Plasma	Ok
12	10:59:39:123AM	Plasma	Ok
13	11:13:39:670AM	Plasma	Ok
14	11:27:00:950AM	Plasma	Ok
15	11:40:46:077AM	Plasma	Ok
16	11:53:57:403AM	Plasma	Ok
17	12:06:49:030PM	Plasma	Ok
18	12:23:59:153PM	Plasma	Ok
19	12:37:07:827PM	Plasma	Ok
20	12:50:00:700PM	Plasma	Ok
21	01:03:10:043PM	Plasma	Ok
22	01:16:27:607PM	Plasma	Ok
23	01:29:38:280PM	Plasma	Ok
24	01:42:27:280PM	Plasma	Ok
25	01:55:18:170PM	Plasma	Ok
26	02:08:28:170PM	Plasma	Ok
27	02:22:17:097PM	Plasma	Ok
28	02:35:24:183PM	Plasma	Ok
29	02:48:26:320PM	Plasma	Ok
30	03:03:34:330PM	Plasma	Ok
31	03:16:54:437PM	Plasma	Ok
32	03:29:58:867PM	Plasma	Ok
33	03:43:22:893PM	Plasma	Ok
34	03:57:15:717PM	Plasma	Ok
35	04:12:40:293PM	Plasma	Ok
36	04:25:38:287PM	Plasma	Ok
37	04:39:16:353PM	Plasma	Ok
38	04:53:15:783PM	Plasma	Ok
39	05:08:19:250PM	Plasma	Ok
40	05:24:49:783PM	Plasma	Ok
41	05:37:52:933PM	Plasma	Ok
42	05:51:21:350PM	Plasma	Ok
43	06:06:35:427PM	Plasma	Ok