Alcator C-Mod Weekly Highlights
                 May 4, 2009


FY2009 weeks of research operations:
  Target: TBD
  Completed:  0 weeks


Operations
----------

Re-assembly of the alternator is proceeding.  The rotor bore copper has
been re-installed and Megger and Polarization Index tests on the rotor
windings have been successfully completed.  The rotor is being
positioned in the alternator housing and will soon be back on its
bearings.  Preparations are being made for stator Megger and Hi-Pot
tests.

Re-assembly of the C-Mod cryostat is complete, and work is proceeding on
installation of the vertical and horizontal port boots that seal the
cryostat against outside air.  Installation of horizontal flanges and
upper and lower Tees continued.  The vacuum pumping station has been
installed on the H-Port horizontal port.  Installation of the error
field correction coils continued, as did inspection and re-assembly of
the magnet bus system in the power room.


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

Successful braze tests of the vacuum window into the forward waveguide
have been completed.  Preparations for the production run in which the
sixty-four waveguide windows will be brazed, four at a time, are being
made.  Fabrication continued on other launcher components, including the
4-way splitters, bellows support plates, launcher positioning system,
right angle transmission line sections, and Inconel plates and rods
needed to clamp the forward structure together.

The 4-way splitter prototype has been installed in the high power test
stand.  Network analyzer measurements of the prototype agree with
predictions from the simulations.  Thermocouples and probes are being
installed in preparation for the high power tests.

The design of the new magic tee splitters has been completed.  The new
design minimizes the electric field in locations that could cause rf
breakdown at full power.  Fabrication drawings for the magic tees are
being prepared.

Design of the lower hybrid control system upgrade and the rf probe
electronics and protection system continued.


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

Work on the Master Fault Processor mezzanine board layout continued. The
design of the ethernet interface section of the board has been sent for
review to the maker of the peripheral interface controller (PIC) used in
the design.

The FMIT#3 driver has been operated at low to moderate power into a
dummy load.


Travel and Visits
-----------------

Igor Bespamyatnov, UT-FRC, was at MIT last week to prepare the wide view
CXRS diagnostic for the next campaign.

John Rice, Catherine Fiore, Martin Greenwald, Jerry Hughes, Miklos
Porkolab, Darin Ernst, Liang Lin (now at UCLA), and Bill Rowan, UT-FRC,
attended the TTF Workshop in San Diego, CA last week, and presented
C-Mod relevant material.  Their presentation titles may be found at

http://ttf2009.ucsd.edu/TTFMeetingProgram2009RR.pdf

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