BESⅢ漂移室边界场丝层补偿电压的研究  

Study of the Compensation Voltage on the Boundary Field Layer of the BESⅢ Drift Chamber

作　　者：伍灵慧[1] 刘建北[1] 秦中华[1] 陈昌[1] 庄保安[1] 陈元柏[1] 王贻芳[1] 金艳[1] 刘荣光[1] 马骁妍[1] 马媛媛[1] 唐晓[1] 王岚[1] 徐美杭[1] 张桂芳[1] 朱旻萱[1] 朱启明[1] 

机构地区：[1]中国科学院高能物理研究所

出　　处：《高能物理与核物理》2006年第7期665-669,共5页High Energy Physics and Nuclear Physics

摘　　要：BESⅢ漂移室边界丝层单元存在着严重的X-T关系左右不对称问题,模拟研究表明在边界场丝层上设置适当的补偿电压能很有效地减小这种不对称．通过BESⅢ漂移室模型的束流测试验证了边界场丝层补偿电压方案对减小X-T关系左右不对称的有效性,同时还研究了补偿电压对边界丝层单元空间分辨及dE／dx测量的影响．There exists strong left-right asymmetry of the X-T relation in the boundary cell of the BESⅢ drift chamber. The simulation indicates that this kind of asymmetry can be reduced by applying compensation voltage on the boundary field layer, which is confirmed in a beam test for a prototype chamber. The impact of the compensation voltage of the boundary cell on the spacial resolution and the dE/dx measurement is reported in this paper.

关 键 词：漂移室 X-T关系 边界丝层 BESⅢ 

分 类 号：O572.21[理学—粒子物理与原子核物理]