Alcator C-MOD Weekly Highlights
				Feb. 17, 1994

Progress continues in preparing the facility for the upcoming Phase IIA
operating campaign. 

Test fit-ups of the new divertor shunts were made this week.  Only one
machining operation remains for the shunts before they will be sent out for
plating. All outer divertor modules are now in-vessel.  The inconel hold-down
bolts are installed, but have not yet been torqued to specification.  Two of
the twenty ceiling modules have been installed.  Repair work was begun on the
divertor gas puff tubes and thermocouples, and installation was begun on new
gas tubes.

The B-bottom cross is now back on the machine, awaiting final torquing.  This
cross was modified so that, among other things, better pressure measurements
could be made in the divertor. It was welded, cleaned, and leak checked this
week.

A-horizontal flange work is progressing well. Most of the  welding operations
are now complete.  The cowl that will allow the flange to be sealed to the
cryostat is now being fitted up to the flange.  With the installation of the
cowl, the flange can be sent out for its final grinding operation. 

The Thomson scattering alignment fixtures are now being cycle tested in the
vacuum test chamber after a successful bake-out.  Binding of these fixtures
caused a run to be delayed during the last operating period.  They have been
re-worked by the supplier, and should now be more reliable.  The 10-inch
gate-valves for the CO2 scattering experiment being done in collaboration with
Oak Ridge arrived this week.  Roger Richards will visit next week from Oak
Ridge to prep the valves for installation on E-port top and bottom.

The upper  half of the  cryostat was installed early this week.  We were then
able to seal the horizontal flange boots to the cryostat, and begin running
the TF tap and inner seal pressure gauge cables that run in cable trays around
the cryostat.  We have also begun installation of the igloo blocks. The
installation of the LN2 pump, filters, and associated plumbing is now complete
and a final inspection has been made.  The inspection indicated that a change
to the differential pressure measurement of LN2 level should be made, after
which the sump can be closed up.  Only the LN2 feed line from the pump to the
LN2 control valve manifold remains to be installed. 

The fixturing for installing the ICRF dipole antennas has been installed in
the machine.  All plated parts for the first ICRF dipole antenna, which were
received last week, have now been baked. The plated parts for the second
antenna have now been received and are awaiting bake-out.

Prof. Porkolab attended the ISCUS meeting last week. Dr. Earl Marmar presented
a seminar at the University of Maryland on Wednesday. Steve Fulghum and Pete
Rossler from Science Research Laboratory visited to discuss plans for a novel
fluctuation diagnostic employing visible light to characterize edge
turbulence.  As part of this collaboration, we plan to install a  prototype
detector during the upcoming run period.