Alcator C-MOD Weekly Highlights Feb. 10, 1994 Progress continues to be made toward readying the machine for the Phase IIA operating campaign. Eleven of the fourteen EF1 upper modules mentioned last week have been assembled and installed in the machine. The remaining three modules are now being instrumented with flush-mount probes. In addition, one module is awaiting five tiles now being vacuum baked. All forty ceiling and floor modules have been cleaned and torqued to specification and are ready for installation. J and C port extensions were removed last week to fix leaks discovered in our final leak check before installing the upper cryostat. J port extension has now been replaced and is leak tight. C port extension has been polished, cleaned, inspected, installed, and is now being torqued to specification. The LN2 sump has been cleaned and installation of the pump, filters, and associated plumbing has begun. When the sump is back in place, the last of the LN2 feedline components can be installed. The primary LN2 supply line into the cryostat is already in place, and its phase separator has been installed in the cryostat drain line. The new interlock cables for the LN2 feedline valve and pressure switch are being installed. The cryo PLC is back up and running with some minor upgrades. Modifications to the cryo PLC will be staged in as the new interlocks, and LN2 backup control signals are added. All parts for the first ICRF dipole antenna have been plated and are now in-house. Dana Knoll from INEL is spending the week at MIT to continue work on comparing the results of his NEWEDGE edge modeling code with C-MOD data. New developments in this code include use of a non-orthogonal grid, which should improve modeling of the C-MOD divertor geometry.