From: IRBY@CMOD.PFC.MIT.EDU
Subject: Alcator C-MOD Weekly Highlights
Newsgroups: sci.physics.plasma
Organization: M.I.T.

Alcator C-MOD Weekly Highlights
January 21, 1997



Reassembly of Alcator C-Mod continues. The lower PF
coil package is in place and aligned, and the mounting plates are being
installed. The OH2L coax has also been installed and resistance checks are
underway. All upper PF coils are in place, and alignment of the coils
is proceeding. Hi-Pot and ringing tests are being performed on each coil
as they are positioned, as are flow rate tests of coil cooling passages
and fittings. Many of these tests will be repeated as major components are
added to the assembly.
Work on power systems last week began to concentrate of improvements
to the EF4 supplies to provide more reliable operation with the magnets
in the parallel configuration. The EF4 PLC software was upgraded, new reactors
for the supply were ordered, and work has begun on improving the response time
of the EF4 fault detection circuits.
Work on the crowbar circuits and associated trigger units for the
new RF transmitters is moving rapidly. The new high voltage trigger
transformers are complete and ready for testing. Fitup of coax between the
drivers and finals and the finals and the couplers is nearly complete. High
yard maintenance continues as we checkout and adjust Ross bottles, breakers,
and control circuitry that will supply both the old and new transmitters.
We have begun to work on layouts, schematics, and design details of
the DNB regulator/modulator and capacitor bank. Power distribution work
continues.
Our machine shop is working at full capacity producing components
needed for the new invessel diagnostics discussed last week.
Brian LaBombard visited the University of Texas in Austin last
week, and presented a talk on C-Mod SOL studies. He also discussed
possible probe experiments for the upcoming run campaign with
Roger Bengtson and Dave Winslow.