SRF2011 - List of Authors (Chang, W.)

Paper	Title	Page
MOPO031	Electro-Magnetic Optimization and Analyses of Etching for HIRFL Quarter-Wave Resonators	147
	C. Zhang, W. Chang, Y. He, S.H. Zhang, H.W. Zhao IMP, Lanzhou, People's Republic of China
	A superconducting accelerating section for SSC-linac system (injector into separated sector cyclotron) is under development at the HIRFL (heavy ion research facility of Lanzhou). Two types of superconducting quarter-wave resonators (81.25 MHz, optimum β = 0.041 and 0.085) will be used for acceleration to energies of up to 10 MeV per nucleon. The β=0.041 QWR works at the accelerating voltage of 0.75 MV and β=0.085 QWR works at 1.5 MV, in order to reach a record high performance, the EM design was carefully optimized for both cavities. A selected number of cavity geometry parameters were analyzed to see how they affect the electro-magnetic parameters of the cavity, and different influence levels of these geometry parameters are ranked. In this paper, we will also present how the etching thickness changes the frequency during the buffered chemical polishing processing, and the difference of the change for the two type cavities has been compared.

Paper

Title

Page

Electro-Magnetic Optimization and Analyses of Etching for HIRFL Quarter-Wave Resonators

147

C. Zhang, W. Chang, Y. He, S.H. Zhang, H.W. Zhao
IMP, Lanzhou, People's Republic of China

A superconducting accelerating section for SSC-linac system (injector into separated sector cyclotron) is under development at the HIRFL (heavy ion research facility of Lanzhou). Two types of superconducting quarter-wave resonators (81.25 MHz, optimum β = 0.041 and 0.085) will be used for acceleration to energies of up to 10 MeV per nucleon. The β=0.041 QWR works at the accelerating voltage of 0.75 MV and β=0.085 QWR works at 1.5 MV, in order to reach a record high performance, the EM design was carefully optimized for both cavities. A selected number of cavity geometry parameters were analyzed to see how they affect the electro-magnetic parameters of the cavity, and different influence levels of these geometry parameters are ranked. In this paper, we will also present how the etching thickness changes the frequency during the buffered chemical polishing processing, and the difference of the change for the two type cavities has been compared.