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Cavity tuning etc

Cavity tuning etc. Cryogenics Cavity tuning Tuner Input couplers. 6 th October 2009 video meeting K.Nakanishi. Crab Cavity & Coaxial Coupler in Cryo -module. KEKB review 2007 K.Hosoyama. Support Rod. Jacket Type Main He vessel SUS316L.

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Cavity tuning etc

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  1. Cavity tuning etc Cryogenics Cavity tuning Tuner Input couplers 6th October 2009 video meeting K.Nakanishi

  2. Crab Cavity & Coaxial Coupler in Cryo-module KEKB review 2007 K.Hosoyama Support Rod Jacket Type Main He vessel SUS316L Jacket Type Sub He vessel Support Pipe Tuning Rod Input Coupler Notch Filter Crab Cavity Cell RF Absorber Coaxial Coupler (Nb) Extract TM010, TE111 Mode Frequency Tuning Stub Support Bellows

  3. Cooling He Gas & Cooling Water Cooling Water Input Coupler Main He Vessel Sub He Vessel Cooling Water Liq. He In RF Absorber Coaxial Coupler RF Absorber Notch Filter Bellows Beam Stub Support Gas He RF Monitor Gas He Cooling Water Cooling Water Control Valve KEKB review 2007 K.Hosoyama Flow Meter

  4. Ice balls

  5. Pretuning f0 Expanded length

  6. Pretuning • The cavity must be expanded about 5mm. • Length of Support lodes should be adjusted. Support lod He vessel

  7. by A. Kabe Frequency Tuning by Main Tuner Resonance Frequency Main Tuner Position (mm) Main Tuner Position (mm) Load [kg]

  8. Tuner • In KEKB, the tuner stroke is set as 5mm (~100kHz). • The tuner stroke is limited 10mm(200kHz) by bellows. • The tuner speed that is limited by motor is about 1kHz/s

  9. Tip of input couplers prototype HER LER Some of purple stains were found. It looks good. It’s not shiny.

  10. Horizontal testing Q0 values at design kick voltage were higher than 1x109.

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