Progress Report from the Mechanical/Shield Group Feb 5, 2003


* We started regular meetings this morning.  The next is Feb. 19th
  at 9:00 AM in Tech. Div. Trailer 157 Meeting Room.


* Goal: Investigating Deliverables:

    Multifunction particle/thermal/stray-light shield
   
    Mechanical supports and anchors for the optical bench


* Shield and Cold Plate Engineering and Integration

    Plans: 
        Import the SNAP satellite integration model
           Clark Reid is doing it.  A simple 3D model has been imported 
           from LBL.  In order to import a more detailed model LBL
           has to remake their computer files. He has produced 2D drawings 
           of some shielding components. 

        Investigate technical specifications to make a preliminary look
        at constraints for the shielding model. Start a CAD model.
      
        Investigate options for the Dewar (the space enclosed by the 
        conical shield and cold plate) and begin hte thermal model.


  
* Shielding Simulation

    Plans:
        Simulate charged particle transport using MARS and Geant so as to 
        determine options for shielding.
           Fritz Dejongh is leading this subgroup.  Nikolai Mokhov is now
           on a NASA commitee of experts in radiation shielding. Igor
           Rakhno is starting a MARS model based on the information
           provided by Clark.  

        Develop concepts for the mechanical design/shape of the 
        radiation shield, including shielding from the direction of the
        cold plate.

        Investigate the effect of the particle radiation on the cold 
        plate images.