Alcator C-Mod Run 1060330 Information

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Entered: Mar 28 2006 02:53:45:630PM
Author: Joseph Snipes
Engineering setup for Thursday 30-Mar-2006

MP466 Intra_Shot Diborane Injection in Alctor C-Mod

Session leader: Irby
Physics operator: Snipes

Overnight ECDC in D2, and bake at 60 C.

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

Power systems as on 1060328010 (1.0 MA fiducial, 5.4 T, LSN)

A-coil configuration: normal [+Dtop -Dbot -Jtop +Jbot] and enabled.

Gas Setup:

fill B-Top with 6 psi D2 Fill select enabled (PG4)
fill B-side lower with 1 psi Ar + 2 psi Ne Hybrid DISABLED (PG1)
leave B-side upper as is Hybrid DISABLED (PG2)
fill B-main (C-side) with 40 psi D2 Hybrid enabled (PG3)
fill NINJA with 12 psi D2 Enabled

Enable the following gate valves and shutters: TCI and YAG

Torvac setup: GV1 closed with bypass at 180 clicks
GV2 set to toggle closed at pulse for 300 s

Startup should use static fill.


Shot Sequence:

1-3 Produce LSN, rf fiducial shot with at least 2 MW of ICRF
power. Demonstrate that the discharges are reproducible (fiducial:
1060328010)

4-8 Begin diborane injection with 500 ms pulse at t=450 ms and ICRF at
650 ms. Modify gas puff as required to eliminate disruptions.

9-17 Assuming stable conditions have been found, monitor plasma
performance over several constant discharges.

If an improvement in performance is seen, stop He/ B2D6 puff for two
shots and judge how long the effects last.

18-21 Double null operation (1050303024 --- seg 4)

22-23 Return to LSN to observer any changes

23-30 USN operation if no improvements noted otherwise continue DN or
return to LSN.

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