Alcator C-Mod Weekly Highlights
                       January 11, 2010


FY2010 weeks of research operations
  Base Target: tbd
  Base Completed: 1.7 weeks
  ARRA Target: 5 weeks
  ARRA Completed: 5.0 weeks
  Plasma Shots: 807


Operations
----------

Routine maintenance of C-Mod systems continued last week.  Refurbishment
and upgrades are being performed on liquid nitrogen systems, the cell
water cooling unit, C-Mod gas system, and vessel heater and thermocouple
electronics.  Work also continued on the lower hybrid launcher and
protection and control systems.


Lower Hybrid System
--------------------

Phase and amplitude measurements of the new lower hybrid launcher
indicated low power transmission through many of the launcher vacuum
windows.  The attenuation was found to be caused by metal deposition
that occurred during an e-beam welding process.  We are in the process
of determining the best method by which to clean the windows.

Testing of the Coupler Protection System (CPS) for the new launcher
continued.  Software is being modified to allow calibration of the new
rf probes to be performed as part of the overall launcher calibration
process.  Development of the rf hardware needed for the rf probe
measurements is proceeding.


ICRF Systems
------------

We continued routine maintenance of the transmitters last week.  The
FMIT#4 Final Power Amplifier (FPA) anode current monitor, FPA anode
overload, driver anode DC voltage and DC overload circuits were checked
and re-calibrated.  Inspection of FMIT#4 crowbar also continued.
Repairs were made to the dummy load used to test FMIT#3 and FMIT#4.


Alternator
----------

Two seal oil differential pressure regulating valves are back in-house
following refurbishment last month.  The alternator main vacuum pump was
shipped out for refurbishment last week and is expected back in-house
next week.


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