Upgrading of a Heavy Ion 1MeV ISR RFQ Accelerator  

重离子整体分离环RFQ加速器的升级改造

作　　者：张萌[1] 陆元荣[1] 彭士香[1] 朱昆[1] 颜学庆[1] 高淑丽[1] 王智[1] 郭之虞[1] 赵捷[1] 方家驯[1] 李纬国[1] 郭菊芳[1] 袁忠喜[1] 宋执中[1] 于金祥[1] 于茂林[1] 陈佳洱[1] 

机构地区：[1]北京大学重离子物理研究所,核物理与核技术国家重点实验室,北京100871

出　　处：《Chinese Physics C》2008年第z1期262-264,共3页中国物理C（英文版）

基　　金：国家自然科学基金(10455001;10605003)资助~~

摘　　要：This paper presents new beam test results for O^+ beam on a high current Integral Split Ring Radio Frequency Quadruple(ISR RFQ)accelerator.After the upgrading,a new designed 2.45GHz O^+ ECR Ion Source can provide a beam with macro-puise peak current of 4mA at the injection point behind a 15ram diaphragm,whose O^+ factor is 60%—80% varied with gas flow rate and the normalized rms emittance is less than 0.15πmm·mrad.The accelerated O^+ beam current goes up to 2mA with the transmission of about 80% at 45kW RF power with duty factor 1/6(pulse duration of 1ms and repetition frequency of 166Hz).The upgraded RF power system includes low level RF pulse modulation amplifier,AGC,3W and 20W preamplifiers,1kW driver and 30kW final amplifier,which can output nearly 50kW in pulsed mode.The vacuum has been improved,too.The upgraded 1MeV ISR RFQ can be used as the beam injector of a new designed SFRFQ accelerating system,which is under the construction at Peking University.介绍了北京大学重离子整体分离环RFQ(ISR RFQ)加速器的升级改造工作,包括升级后RFQ加速系统的组成;强流永磁2.45GHz O^+ ECR离子源的台面测试结果;真空系统的改造:1MeV ISR RFQ加速器的高频控制系统改造;以及强流束流加速实验的结果.

关 键 词：integral split ring RFQ UPGRADE RF power system 

分 类 号：TL56[核科学技术—核技术及应用] TL505