BESIII主漂移室性能的模拟计算  

Simulation calculation of the performance of BESIII main drift chamber

作　　者：张丙新[1] 刘怀民[1] 李卫国[1] 陈元柏[1] 

机构地区：[1]中国科学院高能物理研究所,北京100049

出　　处：《核电子学与探测技术》2005年第2期134-136,141,共4页Nuclear Electronics & Detection Technology

摘　　要：根据BESIII主漂移室(MDC)的设计方案,利用TRACKERR程序对主漂移室的带电径迹的5个参数ζ(Z轴方向的位移)、s(dip角的正切)、ξ(带电径迹在XY平面的投影位移)、φ(方位角)、Κ(横向动量的倒数)进行误差计算,得到了相应的误差矩阵。给出主漂移室对动量为1GeV/c的带电粒子的动量分辨率和空间分辨率。According to the scheme in design of main drift chamber (MDC) on BESIII, the error matrix of five parameters are calculated with TRACKERR. The five parameters are ζ(the displacement in Z), s(the tangent of the dip angle, the dip angle is λ(=π/2-θ),ξ the displacement in the x-y plane perpendicular to the projection of the track direction vector onto that plane), φthe azimuth of the particle's direction), and K (the inverse of the radius of curvature). At the same time , the responding momentum resolution and space resolution of charged track in 1 GeV/c are given .

关 键 词：BES 径迹 动量 矩阵 主漂移室 倒数 投影 模拟计算 空间分辨率 带电粒子 

分 类 号：TL594[核科学技术—核技术及应用] O572[理学—粒子物理与原子核物理]