Alcator C-Mod Weekly Highlights October 19, 1998 Engineering: Re-assembly of Alcator C-Mod continued last week with the installation of all lower TF arms. Installation of the new spring plates is also nearly complete. Ultrasonic cleaning of the upper arms and feltmetal soldering of the TF legs continues. We continued development of the DNB for C-Mod. The F-port racetrack flange was inspected and sent out for final surface finishing. The high-resolution ECE mirror subassembly was successfully test fit to the flange. Stud templates for the CXRS invessel optics were completed, cleaned, and assembled. Progress continued on the high voltage power supply with the completion of the design of the analog conditioning board and construction of the last of the fiber optic links between the MCL and the HV supply. The Power Systems Group continued bringing C-Mod power supplies back online. The EF4 supply was completely checked out including all fuses, SCRs, gates, and fault indicators. We have begun the OH1 supply shakedown. Work on CAMAC systems for the new transmitters is progressing. Problems with the plating operations on the new PPPL antenna have delayed its arrival at MIT somewhat. We continue to focus as much manpower as can be spared from machine assembly to the completion of invessel work. The divertor bypass flap components are nearly complete. Bolometry, tangential interferometry, the VUV scanning mirror, new MHD coil upgrades, and modifications to the limiters, are all beginning to get more design and machine shop time. Visits and Travel: Prof. Jim Drake of U. Maryland visited and had discussions on several topics with members of the PSFC. He gave a seminar entitled "The L/H Transition and the Structure and Stability of the Edge Pedestal".