Alcator C-MOD Weekly Highlights
		        April 28, 1997



	The alternator is now running at full speed and was used for
power tests into the magnets on Friday.  After cooling down the
machine structure and the magnets, we exercised all power supplies and
coils except for EFC.  Several small problems were found and corrected.
A faulty breaker on the EFC chopper supply has been repaired and this
supply is ready for testing.  The power group has now turned its attention
to preparations for the EF4 reactor installation.
	Following four days of bake-out at temperatures up to 130C, the vessel
was cooled down and leak checked. A leak was found at the D horizontal
port, which is one of the two ICRF antenna ports. Some of the newly installed
RF coax had to be removed to reach the flange so that tests could be made
near the seal.  A smaller leak was also detected at a window at C-port. The
vessel will be brought up-to-air in order to remedy these leaks, following
which bake-out will resume.
	Work on the new RF transmitters and transmission lines is moving
rapidly now that people have been freed up from machine assembly.  The
Hi-yard work is complete and awaiting inspection.  The major work involved in
assembling, fitup, and building support structures is complete for the
new coax in the cell.  We are now working on installation of the transmission
line diagnostics and fault detectors.  The new ignitrons for the crowbar
circuits have been installed and the cooling water loop is operational.
Coax from the IPAs to the FPAs is being installed.  High voltage cables and
conduit is also being installed.
	As-built documentation of the DNB Mod/Reg was completed and we are
beginning the modifications required to use the new ACCEL supply.  We are
working up plans for the various conduits required to get the ACCEL
voltages and arc/filament current to the cell from the power room.  Ned Eisner
has joined the DNB group.  He did his PhD work at Columbia, and is now a
postdoc with the University of Texas.  Ned will be permanently on-site
to participate in DNB installation, operation, and diagnostic development.
	Raffi Nazikian and Mike McCarthy from PPPL visited last week to
work on software and hardware problems involving the reflectometry
collaboration.  Gerd Schilling, also from PPPL, continued working with the
RF group on the new transmitter installation.
	Steve Wolfe, Martin Greenwald, and Amanda Hubbard attended the
US-European Transport Task Force Workshop  in Madison, Wisconsin last week.
Martin Greenwald and Amanda Hubbard presented papers.  The title of Amanda's
talk was "Analysis of Edge Parameters in the H-mode Transition and Pedestal
on Alcator C-mod", and Martin's was  "Recent Observations in Alcator
C-mod H-modes".