北京正负电子对撞机(BEPC)储存环B-A规测量抗干扰的实验研究  

Experiment Study on Jamproof of B A Gauge for Storage Ring in BEPC

作　　者：林绍鸾[1] 郝玉英[1] 

机构地区：[1]中国科学院高能物理研究所

出　　处：《真空》1997年第1期20-23,共4页Vacuum

摘　　要：ＢＥＰＣ运行７年来，储存环超高真空系统平均本底真空一直优于６．７×１０－８Ｐａ，环真空测量采用Ｂ－Ａ规通过１００ｍ长电缆线输入信号到真空计，观察真空计的测量读数来监视真空。在运行中，环上有１／４的真空测量点受干扰，造成测量读数为０，严重影响环超高真空系统的监测，也无法求环平均动态真空的准确度。本文介绍一种采用新型收集极电缆线和在系统内加金属网抗干扰措施的实验研究。结果表明，干扰来自两方面：其一是冲击磁铁（Ｋ铁）的脉冲磁场，以及Ｋ铁高压引出线周围的电磁波辐射；其二是束流在Ｋ铁内激发的高次模式电磁波。在实验中，分析研究了干扰的来源。The BEPC has been operated 7 years since 1988. The mean base pressure<6.7×10 8 Pa in vacuum system of storage ring. The vacuum is monitored by nude B A gauge, it's collector signal through 100m long cable input to control unit. When the machine is operating, pressure monitor points for 1/4 ring, they are interfered and result pressure reading are zero, can't accurately give dynamical mean pressure. Experiment study a new cable of collector and a method is the add metalic screen mech in necan't of gauge head for jamproof, they are introduced in this paper. Result showed interference from two aspects; One is from pulse magnetic field of kicker. The another is from the beam induced RF field and high order mode in kicker. In this experiment, source of interference was analysed, based on it by best way for anti interference.

关 键 词：BEPC 真空测量 正负电子对撞机 储存环 

分 类 号：O572.214[理学—粒子物理与原子核物理]