Title :
RF cavity design for high current operation of the Cornell Electron Storage Ring
Author :
Greenwald, S. ; Greenwald, Z. ; Hartill, D. ; Morse, D. ; Kirchgessner, J. ; Rice, D.
Author_Institution :
Lab. of Nucl. Studies, Cornell Univ., Ithaca, NY, USA
Abstract :
Redesign of the 500-MHz RF cavities used in the Cornell Electron Storage Ring (CESR) has been carried out to improve their reliability and to optimize them for a 600-mA total current. The factor-of-four-higher beam current compared to the present operation levels requires redesign of the quarter wave input coupling transformer and the 50-Ω coaxial ceramic high power window, and improvement of the power handling capability of the higher-order mode load on each cell to 20 kW. To lower the higher-order mode impedance of the cavities and to simplify their mechanical construction, the number of cells in each cavity has been decreased from 14 to 5 cells and the number of cavities has been increased from 2 to 4 cavities. Design details, modeling, and computer simulation of the expected performance are presented
Keywords :
beam handling equipment; electron accelerators; storage rings; 50 ohm; 500 MHz; CESR; Cornell Electron Storage Ring; RF cavities; coaxial ceramic high power window; computer simulation; design; high current operation; higher-order mode impedance; higher-order mode load; quarter wave input coupling transformer; Ceramics; Coaxial components; Copper; Electrons; Feeds; Laboratories; Positrons; Radio frequency; Storage rings; Welding;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73133
