This is a multi-part message in MIME format. --===============1078814950518305533== Content-Type: multipart/alternative; boundary="------------080509070209020802040505" This is a multi-part message in MIME format. --------------080509070209020802040505 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Alcator C-Mod Weekly Highlights January 7, 2013 FY2013 weeks of research operations Target: tbd Completed: 0.53 weeks Plasma Shots: 61 Operations ---------- In-vessel work last week included removal of the polarimeter shutter which is now undergoing evaluation. The D-Port antenna current straps were also removed so that they can be polished and possibly re-plated, depending on what is found during inspection. Advanced Outer Divertor (AOD) ----------------------------- A 2D COMSOL structural analysis of the sheet shunt design is complete, and results look promising enough to proceed with a prototype. A 3D EM/Structural model is also being developed that will eventually be integrated into our full model of the outer divertor. An assembly fixture for the shunt is being designed. A COMSOL model has been used to predict loads on A-frames, gussets, and bearings from eddy currents during disruptions. All stresses are within allowables. Analysis of stresses on bolts securing these components is ongoing, as is the addition of halo currents to the model. The EF1 heat shield redesign continues. Components previously planned for installation on the vessel floor will either need to be removed or repositioned to provide room for the heat shield. Work needed to integrate probes, thermocouples, and surface temperature diagnostics into the AOD design continued last week. The design of the connector assemblies for the probes is complete. The design of the tiles that will accept these diagnostics is underway. ICRF Systems ------------ FMIT#4 is back in operation following a successful crowbar wire test. New bandpass filters have been installed to improve forward and reflected power measurements at 53 MHz. FMIT#3 tuning to 53 MHz has begun. Calculations of the J-Port antenna transmission line loop lengths for operation at 53 MHz have been completed. Work continued on installation of the new FFT systems. Interconnecting cables for the control system are being fabricated, and the control electronics are nearing completion. Rack locations in the cell have been finalized. Lower Hybrid Systems -------------------- Algorithms needed to control the LH FFT system continue to be developed as is the hardware needed to provide the control. Design work on the mezzanine extension required to support new racks for the 4th lh cart is well underway. Diagnostic Neutral Beams Systems -------------------------------- Electrical characterization of the DNB high voltage tank components was completed last week. This process is being carefully documented so that the status of the tank components can be compared to baselines in the future. We continued to prepare the DNB high voltage tank for an in-air 20 kV hi-pot test. The tank will be sealed and additional tests done in SF6 once in-air tests have been completed successfully. --------------080509070209020802040505 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit             Alcator C-Mod Weekly Highlights
                   January 7, 2013


FY2013 weeks of research operations
   Target: tbd
   Completed: 0.53 weeks
   Plasma Shots: 61

Operations
----------

In-vessel work last week included removal of the polarimeter shutter
which is now undergoing evaluation. The D-Port antenna current straps
were also removed so that they can be polished and possibly re-plated,
depending on what is found during inspection.

Advanced Outer Divertor (AOD)
-----------------------------

A 2D COMSOL structural analysis of the sheet shunt design is complete,
and results look promising enough to proceed with a prototype. A 3D
EM/Structural model is also being developed that will eventually be
integrated into our full model of the outer divertor. An assembly
fixture for the shunt is being designed.

A COMSOL model has been used to predict loads on A-frames, gussets, and
bearings from eddy currents during disruptions. All stresses are within
allowables. Analysis of stresses on bolts securing these components is
ongoing, as is the addition of halo currents to the model.

The EF1 heat shield redesign continues. Components previously planned
for installation on the vessel floor will either need to be removed or
repositioned to provide room for the heat shield.

Work needed to integrate probes, thermocouples, and surface temperature
diagnostics into the AOD design continued last week. The design of the
connector assemblies for the probes is complete. The design of the
tiles that will accept these diagnostics is underway.

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

FMIT#4 is back in operation following a successful crowbar wire test.
New bandpass filters have been installed to improve forward and
reflected power measurements at 53 MHz. FMIT#3 tuning to 53 MHz has
begun. Calculations of the J-Port antenna transmission line loop
lengths for operation at 53 MHz have been completed.

Work continued on installation of the new FFT systems. Interconnecting
cables for the control system are being fabricated, and the control
electronics are nearing completion. Rack locations in the cell have
been finalized.

Lower Hybrid Systems
--------------------

Algorithms needed to control the LH FFT system continue to be
developed as is the hardware needed to provide the control.

Design work on the mezzanine extension required to support new racks for
the 4th lh cart is well underway.

Diagnostic Neutral Beams Systems
--------------------------------

Electrical characterization of the DNB high voltage tank components was
completed last week. This process is being carefully documented so that
the status of the tank components can be compared to baselines in the
future. We continued to prepare the DNB high voltage tank for an in-air
20 kV hi-pot test. The tank will be sealed and additional tests done in
SF6 once in-air tests have been completed successfully.

--------------080509070209020802040505-- --===============1078814950518305533== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Cmod_weekly mailing list Cmod_weekly@lists.psfc.mit.edu http://lists.psfc.mit.edu/mailman/listinfo/cmod_weekly --===============1078814950518305533==--