Study of a magnetic alloy-loaded RF cavity for bunch compression at the CSR

• Published in: Chinese physics C Vol. 34; no. 12; pp. 1879 - 1882
• Main Author: 殷达钰 刘勇 夏佳文 李朋 赵永涛 杨磊 齐新
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.12.2010; Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China; Graduate University of Chinese Academy of Sciences,Beijing 100049,China%Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China
• Subjects: 企业社会责任; 兰州重离子加速器; 合金成分; 绝热压缩; 重离子束; 重离子研究装置; 高频腔; magnetic alloy; high permeability; bunch compression; high gradient; broadband cavity
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/34/12/016

The Heavy Ion Research Facility and Cooling Storage Ring（HIRFL-CSR）accelerator in Lanzhou offers a unique possibility for the generation of high density and short pulse heavy ion beams by non-adiabatic bunch compression longitudinally,which is implemented by a fast jump of the RF-voltage amplitude.For this purpose,an RF cavity with high electric field gradient loaded with Magnetic Alloy cores has been developed.The results show that the resonant frequency range of the single-gap RF cavity is from 1.13 MHz to 1.42 MHz,and a maximum RF voltage of 40 kV with a total length of 100 cm can be obtained,which can be used to compress heavy ion beams of 238U72＋ with 250 MeV/u from the initial bunch length of 200 ns to 50 ns with the coaction of the two single-gap RF cavity mentioned above.