S. Ramberger, M. Schuh, G. DeMichele and P. Tirado


  • Commissioning structures with 10% more voltage than nominal


  • Circuit model amoust complete, losses still have to be included
  • Detailed presentation next meeting
  • Measurements on the CCDTL planed


  • High Power Test ongoing
    • Operating with 50Hz and 1.5ms pulses. Breakdowns observed (max PCAV=170kW)
    • X-ray measurments done with the detector on the side and on beam axis at different powers (waiting for data)
    • Operating with 30Hz and 1.5ms pulses. Breakdowns observed (max PCAV=180kW)
    • Until now the designed power (220kW, taking into account the 80% of the Q) has been reached up to 4% d.c. (20Hz, 2msec)
    • CW run with 24kW over weekend
      • Max temperature: 70C for the end-cones


  • High frequency chopping causes a significant emittance growth, if Qex exeeds 105. Only certain high frequency chopping patterns are foreseen in SPL operation and can be fixed. This would allow tuning the HOMs away from resonance lines with slight cavity design changes.

-- MarcelSchuh - 20-Nov-2009

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Topic revision: r2 - 2009-11-20 - GiovanniDeMichele
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