Alcator C-MOD Weekly Highlights
				March 31, 1994

The vacuum break which began in November 1993 has now been concluded. The main
in-vessel activities during this vent included installation of two new ICRF
dipole antennas and a pair of outboard protection limiters; removal and
re-installation of a number of tile modules with improved tile hold-down
techniques, and replacement of a few dozen damaged molybdenum tiles;
installation of new halo current diagnostics, including current shunts of
improved design on each of the ten outer divertor modules and new rogowskii
coils to measure poloidal currents in the vessel and protection limiters;
installation of new in-vessel diagnostics, particularly for study of the
divertor region; and installation of additional capillary gas-puff tubes at
different toroidal locations. Pump-down began on  Monday, March 28. 

The last in-vessel activities were completed on Friday, March 25 with 
installation of
in-vessel diagnostics, followed by clean-up and a thorough inspection, which
was recorded on videotape. An in situ calibration of the neutron detector
system using a source inside the vessel was carried out over the weekend.
Following this the last flanges were sealed and the pump-down began on Monday.
Leak checking is in progress.

The igloo has been completely assembled. The igloo top was installed for the
neutron calibration and has been removed to facilitate leak checking. Once
this operation is complete the top will be replaced, and diagnostic systems
mounted on it, including parts of the TCI interferometer and Thomson
Scattering.

The CRYO system has been checked out in preparation for baking. Testing
included a trial fill of the sump to test the LN2 pump operation. Coils and
cryostat are being purged with N2 gas. The HEAT system is being readied for
use, with final checkout of the vessel thermocouples and heaters.  A
low-temperature bake will begin as soon as leak checking is
complete.

The ECDC (Electron Cyclotron Discharge Cleaning) system has been checked out
into a dummy load and is ready for use.