Alcator C-MOD Weekly Highlights
				July 21, 1994

The maintenance/repair period is continuing.  The partial disassembly is now
complete. This procedure took a total of 26 calendar days, slightly less than
the initial projection. The OH2L coax buss has now been removed, and the
central column, comprising the three OH coils and the TF centerpost, has been
extracted and re-positioned on the lower dome. 

As anticipated, the problem with the OH2L buss was in the vicinity of the
bolt-up connection between the buss and the terminal block on the coil,
specifically, with the center conductor of the coax. Detailed examinations
of the OH2L and OH2U coaxes, as well as tests on a dummy (prototype) coax, are
being conducted to identify the cause of the problem and qualify the solution. 

Some minor damage is present on the mating surface of the OH2L terminal block.
This will be repaired by resurfacing in situ. The integrity of the coil does
not appear to have been compromised, based on electrical measurements, and
initial xray inspection. The effects of the coax problem are localized to the
immediate vicinity of the bolted connection, and no other coils were affected. 

Dr. Roger Richards of ORNL is onsite to install his CO2 laser scattering
experiment. The main shipment of equipment from Oak Ridge arrived on Tuesday,
and the apparatus is being set up in one of the three experimental bays
adjacent to the C-MOD cell. This experiment will measure ion tails produced
during ICRF heating on C-MOD. The diagnostic is prototypical of an alpha
particle diagnostic proposed for ITER. 

Dr. Yuichi Takase has begun a three-week visit to JT-60U in Japan.  He will be
participating in their ICRF experiments. Dr. Earl Marmar attended the first
meeting of the ITER International Experts Group on Diagnostics at the San
Diego Co-center this week. From there he is proceeding to Austin, where he
will be working on the APS DPP program committee. Dr. Bruce Lipschultz is
attending the TPX PAC meeting in Tennessee.