Alcator C-Mod Weekly Highlights May 17, 2010 FY2010 weeks of research operations Base Target: 13 weeks Base Completed: 9.7 weeks ARRA Target: 5 weeks ARRA Completed: 5.0 weeks Plasma Shots: 1630 Operations ---------- We continued fabrication, baking, and installation of new tiles for the outer divertor modules, and several inner wall locations. Three of the ten outer divertor modules have been reinstalled in-vessel. Refurbishment work on the flux loops on the inner wall has been completed to the point of calibration and testing. Calibration of the fast magnetics coils has been completed. Our vendors have nearly completed installation of the piping and electrical runs required for the Alternator Cooling Water Upgrade. Lower Hybrid System ------------------- The new lower hybrid launcher has been installed in-vessel, and both primary and secondary seals have been successfully leak-checked. Installation of waveguide and jungle gym components needed to drive the launcher is in progress. Tests of the drive system that will control the radial position of the launcher are underway. Klystrons needed for the remainder of the FY2010 campaign are being brought back into operation. ICRF Systems ------------ The FMIT transmitters are being prepared for plasma operation. Diagnostics ----------- The WideView CXRS system has been reinstalled in C-Mod. The position and intensity calibrations have been completed. All in-vessel work for this diagnostic is now complete. Component fabrication for, and installation of, the new MSE shutter continued over the weekend. Travel and Remote Participation ------------------------------- Tom Fredian and Josh Stillerman visited Cadarache to discuss potential use of MDSplus for ITER. Stillerman gave a seminar on MDSplus to the ITER CODAC group. They also attended an MDSplus development workshop in Padova, meeting with Gabriele Manduchi to plan MDSplus development. Jim Terry attended the ITPA Diagnostics Topical Group meeting at Oak Ridge National Laboratory, May 11-14. He presented C-Mod's recent work on and results from IR thermography. His talk was entitled "Divertor IR Thermography on C-Mod - Similarities to ITER". Jim is deputy coordinator for the US Group members. Phil Snyder, GA, visited MIT on May 13, 14. He presented a talk, "Developing and testing a predictive model for the H-mode pedestal in tokamaks", at the PSFC seminar and had discussions with a number of PSFC scientists. A major focus of discussions was planning for the FES FY11 joint research milestone in pedestal physics. Phil also worked closely with Jerry Hughes to examine data from C-Mod experiments designed to test the EPED class of pedestal models, and to plan follow-up experiments for the coming year. Soren Harrison visited PPPL last week to work with PPPL engineers on the Advanced Outer Divertor design. He presented the latest concepts and went over updated disruption force analysis calculations. Work is now concentrating on the EF1 pocket area of the machine where multiple layers of insulation may be required to thermally isolate the vacuum vessel from the hot outer divertor. Jay Kung, PPPL, was at MIT last week to work with Arturo Dominguez and Seung Gyou Baek on the C-Mod reflectometer systems. He took the correlation reflectometry system back to PPPL in order to install the new 115GHz fixed frequency channel which will replace the 110 GHz channel. He consulted with Seung Gyou and Arturo on what changes will be required of the intermediate frequency circuitry of the fixed frequency system (50, 60, 75 and 88GHz channels) in order to incorporate the new LH reflectometry system. _______________________________________________ Cmod_weekly mailing list Cmod_weekly@lists.psfc.mit.edu http://lists.psfc.mit.edu/mailman/listinfo/cmod_weekly