标题： BABAR探测器 显示英文标题

标题： The BABAR Detector

摘要： BABAR 是为运行在 Υ(4S) 共振点的 SLAC PEP-II 不对称正负电子 B 工厂设计的探测器，旨在全面研究 B 介子衰变中的 CP 破坏现象。 带电粒子轨迹通过一个多层硅顶点探测器测量，该探测器被圆柱形漂移室包围。 电子和光子的电磁簇射在超导磁体的超导线圈内部排列的一组 CsI 晶体中检测到。 μ 子和中性强子由插入磁铁钢返流间隙中的电阻板室阵列识别。 带电强子通过跟踪探测器和环绕漂移室的环向辐射 Cerenkov 探测器中的 dE/dx 测量来鉴别。 触发、数据获取和数据监控系统基于 VME 和网络结构，由定制的在线软件控制。 介绍了探测器组件及其相关电子设备和软件的设计细节和性能。 显示英文摘要

摘要： BABAR, the detector for the SLAC PEP-II asymmetric e+e- B Factory operating at the upsilon 4S resonance, was designed to allow comprehensive studies of CP-violation in B-meson decays. Charged particle tracks are measured in a multi-layer silicon vertex tracker surrounded by a cylindrical wire drift chamber. Electromagentic showers from electrons and photons are detected in an array of CsI crystals located just inside the solenoidal coil of a superconducting magnet. Muons and neutral hadrons are identified by arrays of resistive plate chambers inserted into gaps in the steel flux return of the magnet. Charged hadrons are identified by dE/dx measurements in the tracking detectors and in a ring-imaging Cherenkov detector surrounding the drift chamber. The trigger, data acquisition and data-monitoring systems, VME- and network-based, are controlled by custom-designed online software. Details of the layout and performance of the detector components and their associated electronics and software are presented.