Alcator C-MOD Weekly Highlights November 27, 1995 The Alcator C-MOD operating campaign will continue this week with ICRF conditioning runs, discharge development, and re-commissioning of the hydrogen pellet injector. Since we did not run last week, the time was devoted primarily to diagnostic calibration and commissioning, installation of new engineering systems, and machine cleanup. Preparation for boronization continues. We now have all hardware in place, and are beginning PLC programming for this new system. The diborane (deuterated) has been ordered. Hybrid control of the toroidal field is being implemented. This addition will allow us to decouple machine startup from the flat-top toroidal field value. Calibrations of the main chamber and divertor pressure gauges verified the high compression ratios reported here last week. Compression ratios of up to 200 were in fact seen. New conductance limiting valves have been installed on the hydrogen pellet injector guide tubes. Greater than a factor of ten improvement in gas load from the injection into the torus has been observed. As much time as possible was devoted last week to an ECDC campaign needed to further clean up the machine for this week's run. In addition, we have begun to implement the access control and machine interlocks required to run the ECDC system 24 hour per day, unattended. Laurie Porte from JET visited last week. On 11/14 several visitors from Japan including Tsugio Tokuta from the Ministry of Education, and Yasuyuki Matsumoto, Fumio Sumi, Tatsugo Kawamoto, and Kohnosuke Sato from NIFS visited. Yuichi Takase gave a seminar at Columbia University on 11/20 on C-MOD results. Bob Granetz and John Rice are in Japan this week.