Minutes RF structure meeting 11.07.2008

M. Schuh F. Gerigk, G. DeMichele, S. Ramberger, R. Wegner, F. Grespan

Buncher Cavity:

  • full job (construction, frequency tuning ...) will be done by Polish company (cheapest offer) within 6 month
  • company also interesting for assamble PIMS, if results of buncher cavity are good


  • Resolution problems in 6 cell simulation with MWS. G. DeMichele is going to talk with N. Alharbi about this problem. Also HFSS simualtion is set up by F. Grespan.
  • First Frequency measurements at DTL prototype are 359MHz. Frequency error probably due to endcup errors. Influence of errors in diamiter are much smaller (600kHz). Frequency error must be understood and is going to be investigated by G. DeMichele, S. Ramberger, F. Grespan
  • Superfish simulation without endcups to crosscheck the frequency measurements without endcup are done by S. Ramberger.
  • end cups should be measured before copper plating in future assemply
  • Beadpull measurements are going to be performed by G. DeMichele and F. Grespan. Therefor still parts missing for setup. Until parts are delivered try to use a rubber belt instead.


  • Planes are ready to start construction of prototype at CERN
  • construction starts in the next days
  • further results are presented next week by R. Wegner


  • Investigating influence of pulsed operation at power dissipation in cavity in comparising to cw operation. There are major differences as long as decay time is smaller than repetition time. Further calculations are done to estimate needed cryo power. (action M.Schuh)

-- MarcelSchuh - 07 Nov 2008

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