Alcator C-MOD Weekly Highlights
			Nov 5, 1996



	Disassembly of Alcator C-Mod is now complete.  Before
reassembly can begin we must finish the inspection of all the TF
arms, make a small modification to the OH coaxes, cleanup and inspect
all EF coil connections, replace several EF1 pocket heaters, and provide added
protection for these heaters so that they will not have to be replaced again.
	A great deal of progress was made this week in diagnosing the
OH coaxes.  Force deflection tests on all three coaxes have been completed.
These tests indicated that more clamping force will be required on the center
coax foot.  To increase the clamping force will require only a small
modification to the current design, and no new coaxes will have to be
fabricated.  This design change is being tested on a spare coax foot before
being implemented on the machine components.  Other tests confirming the
deflection measurements included pressure sensitive film measurements.
	Invessel work continues.  Tile modules are being removed so that
the divertor probe arrays can be refurbished and the inner wall strain
gauges can be tested and recalibrated.  Several inner wall modules will be
removed so that a new set of RF probes can be installed.  Ultrasonic
testing of the tiles is also underway.
	Modifications to the FMIT drivers for transmitters #3 and #4
moved forward.  We are now ready for installation of the tubes and
cavities.  Drive units for the cavities have been tested and control wiring
for the new crowbar units continues. The internal plumbing for the new dummy
load for the new transmitters is underway.  The dummy load for
the #1 and #2 transmitters has been disassembled for cleaning and inspection.
	A new shutter design to protect the tangential interferometer turning
mirror has been completed and is now being fabricated.  The shutter will
protect the mirror during boronization and glow discharge cleaning.
	Specifications for power and water for the diagnostic neutral
beam are being developed.  Preparations are being made to move the
beam supplies into their final locations in the power room.  The beamline
has arrived at MIT and we are arranging for delivery to the power room.
	Personnel at UT-FRC continued planning for installation of the
diagnostic neutral beam (DNB) and several new diagnostics on C-Mod.  The
effects of high density on beam penetration into C-Mod plasmas and on the
signal levels expected for the BES diagnostic were investigated.  At high
densities, excited states of the neutral beam atoms will play a role in
determining local beam density, and hence, diagnostic signal levels.
These most recent results provide a much clearer description of
the beam-plasma interaction and will allow improved estimates of diagnostic
signal levels to be made.  The results of this work will be reported at the
APS meeting next week.
	The design of a Langmuir probe drive to be used for turbulence
measurements on C-Mod has progressed nearly to the point of fabrication
at UT-FRC.  Analysis of Langmuir probe data from TEXT-U continued as evidence
for long-lived features was sought using higher frequency resolution than
attempted previously.  The analysis tools now being developed for this work
will also be applied to existing C-Mod data.
	A page has been setup on the FRC web site to improve access to the
working documents of the collaboration.  A major asset to this page is the
link to the FTP site for C-Mod drawings that was setup by the PFC to
benefit collaborations.
	A great deal of work over the last week has gone into preparations
for the annual APS meeting.  Four invited, nine oral, and twenty-seven
poster presentations will be given by Alcator staff and collaborators.