KEK Structure fabrication status

1
KEK Structure fabrication status

• May 30, 2008
• T. Higo

2
TD18_VG2.4_Disk

• No practical advancement.
• Riccardo calculated the frequency change of 3MHz
  in case of closed damping waveguide at 32mm from
  beam axis. We think it within the tuning range.
• In this case, the diameter becomes probably 70mm.
  Do you accept the diameter for diffusion bonding
  usually done at SLAC? Do you have any preference
  on the diameter from SLAC?
• Related to this, I want to discuss on flatness
  recovery technique.

3
TD18_VG2.4_Quad

• Ueno has started actual detailed schedule
  management.
• Inspection of two bars from two vendors were
  almost done by KEK.
• Will start in a week or so the discussion with
  the vendors, assuming to go ahead and make a full
  structure with four rods.
• I feel that the one with better shape (U-corp)
  may be almost within a tuning range. The
  confirmation will be done and seriously discuss
  the next step in June.

4
TD18_VG2.4_Quad

• Chamber design has started.
• Cylindrical chamber is assumed.
• We need to be educated through many discussions
  on how to connect waveguides and how to realize
  the cooling etc.
• Alignment
• Still discussion stage.
• We do some reasonable compromise for our first
  one, because it is only for high gradient test.
• Fine alignment test will be done in a separate
  simple test stand.