论文标题
BESIII实验的CGEM内部跟踪器的开发和操作
Development and operation of the CGEM Inner Tracker for the BESIII experiment
论文作者
论文摘要
直到至少2030年，北京光谱仪（BESIII）实验的数据采集扩展已导致加速器和检测器升级。正在建造一种创新的圆柱体气体电子乘数（CGEM），以升级患有衰老的内部跟踪器。 CGEM内部跟踪器（CGEM -IT）旨在恢复效率并增强次级顶点位置的重建。 1 T的磁场中的重建需要模拟读数，并且对时间分辨率的电子贡献优于5 ns。整个系统由约10,000个电子通道组成，必须在CGEM-IT的最内层维持14 kHz/带的信号命中率。 CGEM读数系统基于使用110 nm CMOS技术制造的创新虎皮。开发了一个由GEM读取卡（GEMROC）组成的特殊读数链，以供数据获取。自2020年1月以来，配备最终电子设备的三层中有两层一直在北京运营，由于大流行状况，在意大利集团远程控制的测试设施中收集了宇宙射线数据。由于无法对圆柱探测器进行进一步的测试，因此在2021年7月，在CERN进行了测试束，并在最终电子配置的小型原型上进行了由四个三轮平面检测器组成的小型原型。在本演讲中，将介绍该项目的一般状态，并特别强调了测试光束数据收集的结果。
The extension of data acquisition for the BEijing Spectrometer (BESIII) experiment until at least 2030 has resulted in upgrades to both the accelerator and the detector. An innovative Cylindrical Gas Electron Multiplier (CGEM) is under construction to upgrade the inner tracker, which is suffering from aging. The CGEM Inner Tracker (CGEM -IT) was designed to restore efficiency and enhance the reconstruction of the secondary vertexes position. Reconstruction in the magnetic field of 1 T requires an analog readout and an electronic contribution to the time resolution better than 5 ns. The entire system consists of about 10,000 electronic channels and must maintain a peak rate of 14 kHz/strip of signal hits for the innermost layer of the CGEM-IT. The CGEM readout system is based on the innovative TIGER ASIC, which is manufactured using 110 nm CMOS technology. A special readout chain consisting of GEM Read Out Cards (GEMROC) was developed for data acquisition. Two of three layers, equipped with the final electronics, have been operating in Beijing since January 2020 collecting cosmic ray data in a test facility, remotely controlled by the Italian group due to the pandemic situation. Since it was not possible to perform further tests on the cylindrical detector, in July 2021, a test beam was conducted at CERN with the final electronics configuration on a small prototype consisting of four triple-GEM planar detectors. In this presentation, the general status of the project CGEM-IT will be presented, with particular emphasis on the results of the test beam data collection.
