BEPCⅡ直线加速器相控系统的建立(英文)  

Construction of the Phasing System for BEPCⅡ Linac

作　　者：侯汨[1] 耿哲峤[1] 

机构地区：[1]中国科学院高能物理研究所,北京100049

出　　处：《高能物理与核物理》2007年第4期391-394,共4页High Energy Physics and Nuclear Physics

摘　　要：为了获得高品质束流,BEPCⅡ直线加速器采用相位系统来优化和控制16个速调管的RF相位．相控系统分布:低相位噪声射频信号源作为直线系统的主振荡器;加以恒温水系统控制的稳定相位参考线用以提供相控PAD装置Local输入;基于EPICS操作界面的控制软件用以连接16个控制环路的精确测量并对加在每个速调管前级输入的IΦA移相器加以调控;基于能量最大法相位分析测试方法的引入对系统的测试进行了优化从而提高了系统的测试精度．整个系统的建立最终控制了直线因温度缓慢变化引起束流相对加速微波相位偏移而造成的能散度变化．In order to get high beam quality, a RF distribution system is required, with minimal phase drifts and errors in the BEPC Ⅱ linac. The additional installation of phase reference cables and monitoring equipments and stable RF distribution for BEPC linac are finished. The master oscillator is chosen to offer RF signal with low phase noise and a stable phase distribution system is built to deliver RF signal to each klystron. A phase and amplitude detector is constructed to measure the phase precisely and an I^A unit is used for a phase shifter. Control software based on EPICS is used to connect all the units of the system, and a phasing method based on BPM is adopted to optimize the phase of each klystron. Now the phasing system is installed and tested in the klystron gallery of the BEPC Ⅱ linac.

关 键 词：直线加速器 相位幅度测试 I/Q解调器 测试精度 

分 类 号：O572.211[理学—粒子物理与原子核物理]