Minutes RF structure meeting 20.02.2009

F.Gerigk, M. Schuh, G. DeMichele, F. Grespan

CCDTL

• green light from CERN management to go ahead with the ISTC contract,
• material order can now go ahead (FrankGerigk)

DTL

• Status of the circuit model (FrancescoGrespan)
  • latest results fit well with measurements at the prototype
  • at model with 4 small cells high second next neighbor influence was detected
  • estimation of capacitance in the same order of magnitude
  • run additional simulation to estimate capacitance as function of the post length
  • run additional simulation to estimate inductance as function of the distance of the post
  • try to fit calibration curves out of the simulation results
• Power coupler simulations (GiovanniDeMichele)
  • first results
  • resonance frequency decreases with coupler, take into account during tank design (increase frequency).

HOM

• Londitundinal beam dynamic (MarcelSchuh)
  • fast routine using linear fit of ET0 to do longitundinal beam dynamic simulation ready
  • error increases in comparison to exact field integration method at transition has to be checked
  • HOM loading in cavities and feedback to the beam implemented
• HFSS simulations (MarcelSchuh)
  • simulate new beta = 1 geometry
  • geometry has to be adopted to get a flat top field in HFSS

-- MarcelSchuh - 20 Feb 2009