Alcator C-Mod Weekly Highlights December 21, 2001 We continue to work on the new DNB, diagnostics, Lower Hybrid MIE Project and ICRF systems. The engineering group continues to perform upgrades and maintenance on many C-Mod systems. Operations ---------- The addition of new thermocouples to the divertor and a need for faster readouts from the TF scanner system has required the development of new faster systems for recording and transferring these data to our MDSplus data system. This work is proceeding well and is expected to allow faster C-Mod shot cycles during the next run campaign. A complete rework of the LN2 cooling tube system is also expected to improve our shot cycle. Work also continues on maintenance of alternator systems, magnet power supplies and bus, MOV protection equipment, and power system instrumentation. Lower Hybrid MIE Project ------------------------ The wiring for the transmitter control & protection cabinets is nearly complete. Wiring of the water system instrumentation junction box is also proceeding. Installation of the quick-disconnect fittings for the klystron collectors has begun. All four transmitter klystron filament power supplies and instrumentation have been successfully tested. One of the four transmitter solenoid power supplies has been successfully tested. The remaining three are being debugged. Work on the fiber optic communications circuits and PLC and PC based control systems continues. The water cooling pumps for the klystrons are nearly ready to be tested. Layout drawings of the master oscillator distribution chassis for the low power microwave system are proceeding. ICRF Systems ------------ The new demodulator circuit board is being fabricated by an outside vendor. Components to populate the board are being ordered. We are reworking the cell rf control racks to improve reliability. We continue the modeling effort of the full rf transmission line system. DNB and Related Diagnostics --------------------------- The F-port flange design is near completion. A number of changes have been made to facilitate a new rotation diagnostic and to provide additional fibers and shutter control for the high resolution CXRS diagnostic as well as taking advantage of the opportunity to remove the cowling. A task list for the installation of the new beam has been completed. Preparation work for the installation is now actively being pursued. Inner Divertor -------------- The inner divertor C-Plates were installed this week along with the associated thermocouples. This operation completed installation of the inner divertor girdle structure. A picture on the divertor installation can be found at http://www.psfc.mit.edu/cmod/operations/EngImages/Inspection_2001-2002/Disassembly_Assembly/Inner_Divertor_Installation/DCP_0017.JPG The components have not yet been torqued to spec. Some tiles are also shown in position. Checkout of the halo and thermocouple instrumentation is proceeding.