Original Tuner Damage

  1. Operational Problems
        a. RF System Vacuum Trips
        b. Tuner Vacuum Leaks
        c. Overheated Tuner Flanges
    --
  2. Internal Evidence
        a. Arc Track Marks on Tuner Piston
        b. Arc Track Marks on Cavity Port
       c. Damaged Tuner Piston Braze Joints
    --
  3. Causes
        a. Poorly Aligned Tuner Piston
        b. Non-Uniform Piston-Housing Gap
    --
  4. Solutions
        a. Mechanically Align Tuner Piston
        b. Remachine Housing/Piston Gap
        c. Ti-Coat Tuner Piston to Reduce Multipactor
    --
  5. Modular Tuner Redesign Implementation
        a. No Welding in Final Assembly
        b. Align Tuner Piston Within Housing
        c. Continue Ti-Coating Tuner Piston
        d. Contact Fingers Under Development,
            (Presently Using Ag-Plated Be-Cu Fingers)
burntun.jpg
Original Damaged Tuner


cavport.jpg
Damaged RF Cavity Port


burnttitun2.jpg

Damaged Ti-Coated Tuner
(Piston not centered)

 
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