Alcator C-MOD Weekly Highlights
				Feb. 3, 1994

The scheduled maintenance period preceding the 1994 operating campaign 
(Phase IIA) is continuing. 

The vacuum pumping station is now completely back together and ready to run. 
However, leaks on the C and J port inner seals are now being investigated. 
Fixing these leaks may delay somewhat reassembly of the upper cryostat and top
cover, which had been planned for the end of this week.  Work on the new
A-port flange is going well.  Machining of the flange is done, and some of the
welding operations will begin soon.

Six EF1 upper modules were made ready for installation this week. Three of
these modules have been installed in vessel, the last three are now being
installed. The remaining fourteen EF1 upper modules can be completed with the
addition of a few tiles now in the final stages	of vacuum baking.  All ceiling
and floor tile modules have been assembled and are now being cleaned and
torqued to specification. The divertor shunt elements (1 mOhm structures over
which the voltage drop due to halo currents is measured) are also now being
vacuum baked. Machining still continues on the shunt holders. 

Six of the twenty-four draw bars holding the machine top cover to the cylinder
were loosened so that the pins could be removed and inspections made.  Both
visual and dye penetrant tests indicated that the pins and draw bars were in
very good condition.  The draw bars are now being re-torqued.

A new version of the Brambilla ICRF code FELICE has been installed; this
version features an improved edge model. Calculations of antenna loading for 
the C-MOD monopole antenna are in very good agreement with the experimental
data. A preliminary fit-up in the vessel of one of the ICRF limiters, which
will protect the new dipole antennas, was performed.

The waveform database, a collection of data in the form of small MDSplus trees
designed to provide an index to the CMOD shots, has been completed.  It
contains 29 key signals from each shot sampled at low time resolutions.  The
intent of these trees is to provide a very fast picture of a shot or
collection of shots to determine suitability for further analysis.  The
waveform database complements the SUMMARY database, maintained using RDB,
which provides data from specific times during each shot. 

Dr. C. H. Ma of ORNL was onsite this week, continuing installation of the
Faraday rotation experiment he will be operating as part of the ORNL-CMOD
collaboration this year. The optics which allow the Faraday rotation
modulator to be inserted into the CO2 interferometer optical path was tested
and appears to be working well.  The lock-in amplifier used to demodulate the
Faraday rotation signal was installed in the TCI rack.  Installation was begun
on the RF-filter feedthroughs needed to get the new signals into the TCI rack.
In addition, Dr. Ma delivered and installed the first component of the CO2
scattering diagnostic that is being prepared by Dr. R. Richards, also of ORNL. 

Prof. M. Porkolab is in Japan this week where he will be attending the
JAERI-DOE Technical Planning Meeting on tokamak experiments and the US-JAPAN
Workshop on Profile Control. Dr. Earl Marmar is attending the US-Japan
Workshop on Polarization Spectroscopy in Los Alamos. Drs. Bob Granetz and  Bob
Pillsbury are attending the TPX Disruption Meeting at PPPL; Dr. Granetz will
be presenting the latest information on analysis of C-MOD disruption data.