The Measurement Principle of RF Superconducting Nb Cavity

  • This paper describes the measurement principle and methods of RF superconducting Nb cavity according to the energy conservation. It suggests that there are differences in measuring methods between high power and low power cavities due to electron field emission(FE) existing in superconducting Nb cavities. A set of exact formulae and equations on physics parameters of superconducting Nb cavities has been systematically derived, such as quality factor Q0 without loads, the maximum of the surface electrical field intensity Esp, the maximum of the accelerating gradient Eacc, etc.
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  • [1] John C Slater,Microwave Electronics,p44(1950).[2]俎栋林,超导铌腔低温实验中的射频控制,北大重离子所内部报告,IHIP/91021991.10.[3]A.F.Harvey,Microwave Engineering,p204.[4]Chen Chia-erh et al.,“Superconducting RF Activitiesat Peking University”PAC,San Fracisco,1991.[5]杨祥林等,微波器件原理,电子工业出版社,第28页,1985.[6]张肃文,高频电子线路,下册第一分册第92页,1992.[7]T.Weiland,DESY 82-015 and DESYM-82-24,Germany.[8]U.Laustroer,U.vanRienen, T.Weilnad,DESYM-87-03(February1987),Germany.[9]K.Halbach,R.F.Holsinger,Part.Acc.,7(1976)213.[10]S.Ramo,J.R.Whinnerry,T.Van Duzer,Fielded Waves in Comuncation Electronics,p567(1957).[11]Q.S.Shu et al.,Reducing Field Emission in Supercoducting RF Cavities for the Next Generation of Particle Accerators, CLNS 90/1020.
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Zu Donglin and Chen Jiaer. The Measurement Principle of RF Superconducting Nb Cavity[J]. Chinese Physics C, 1996, 20(7): 663-672.
Zu Donglin and Chen Jiaer. The Measurement Principle of RF Superconducting Nb Cavity[J]. Chinese Physics C, 1996, 20(7): 663-672. shu
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Received: 1900-01-01
Revised: 1900-01-01
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The Measurement Principle of RF Superconducting Nb Cavity

    Corresponding author: Zu Donglin,
  • Institute of Heavy Ion Physics, Peking Unviversity, Beijing 100871

Abstract: This paper describes the measurement principle and methods of RF superconducting Nb cavity according to the energy conservation. It suggests that there are differences in measuring methods between high power and low power cavities due to electron field emission(FE) existing in superconducting Nb cavities. A set of exact formulae and equations on physics parameters of superconducting Nb cavities has been systematically derived, such as quality factor Q0 without loads, the maximum of the surface electrical field intensity Esp, the maximum of the accelerating gradient Eacc, etc.

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