Alcator C-MOD Weekly Highlights Sept. 11, 1995 ALcator C-MOD is in a scheduled maintenance and upgrade period. Progress toward readying the machine for the fall operating campaign is continuing. The optics head for the edge Thomson scattering system has been repaired and is now leak-tight. The head is undergoing temperature cycling to test the integrity of the new welds prior to installation in the vessel. Work on the divertor hardware is proceeding. Sixteen of twenty lower inner divertor modules have been refurbished and installed in the machine. Eighteen of twenty upper inner divertor modules have been refurbished; installation of these modules will begin this week. Work on the divertor probe arrays is proceeding. All of the triax cables associated with these probes were removed from the machine to facilitate repair work. There are two sets of these cables, consisting of 18 cables for the inner divertor probes and 30 cables for the outer divertor probes. Adjustments and repairs to the inner cable set and interface boxes are complete, including replacement of three triax cables. Work on the outer cable set and boxes is proceeding. Work on the new EF4 supply is proceeding. The gate drive boards have been calibrated and are operating. New sin/cosine boards have been received from the vendor. Wiring between the control cabinet and supply is proceeding. The time-of-flight low energy neutral particle analyzer has arrived from Los Alamos. This instrument is part of a LANL-Alcator C-MOD collaboration, and will be used to investigate neutrals in the plasma edge and SOL. Ian Hutchinson attended the Fusion Power Associates meeting in Montreal, where he presented a paper on recent C-MOD results.