Alcator C-MOD Weekly Highlights
			September 2, 1997


The Alcator C-Mod maintenance period continued last week with
work on the alternator, DNB, Power, and RF systems.  Analysis of data from
the last run period continues.

All alternator field coils have been cleaned and coil end connections
are being refurbished.  The rotor was bead blasted in preparation for
ultrasonic testing. Ultrasonic and mag-particle inspection of the rotor has
been completed successfully.  The stator has been thoroughtly cleaned and
inspected.  A hi-pot test of the stator was performed sucessfully.
Refurbishment of the rotor wedges continues.

Maintenance on FMIT#1 and #2 continues.  Testing of FMIT#1 into the detuned
dummy load has been completed.  FMIT#2 is now undergoing the same testing.
The demodulator calibration was completed.  Most of the modules were in good
condition; however, a few required some adjustment.  Work on FMIT#3 and #4's
PLC wiring is progressing.  Discussions have begun concerning the frequency to
which these transmitters should be tuned for the start of the 1998 campaign.
The frequency choice is required so resonant loops and associated coax system
can be designed.

The DNB vacuum system local control, the cryopump compressors, and
the magnet supply were installed in the DNB test area and provided with power.
The vacuum system, fueling system, and the manual controls for these
systems were fully tested.  The beamline has been roughed down and is ready
for a full pumpdown as soon as the turbo pump is operational.  Installation
of the vacuum system PLC has begun.
	
The chord-integrated data from the edge xray array has been inverted
to get edge emissivity profiles as a function of time.  Preliminary results
during ELMy H-modes show a very sharp pedestal width, which can be as narrow
as 3-4 mm.  The pedestal is located inside of the nominal separatrix by 7 mm
or more.  The xray pedestal is momentarily destroyed during ELM events, but
recovers quickly.  The heat pulse from the ELM's is observed well beyond the
limiter radius.
	
Boris Grek, Dave Johnson, and Ben LeBlanc visited from PPPL
last week to work on the X-point Thomson scattering system.