标题： PANDA 笔筒 DIRC 显示英文标题

标题： The PANDA Barrel DIRC

摘要： PANDA实验在欧洲反质子和离子研究国际加速器设施（FAIR），德国达姆施塔特，将使用$\bar{p}p$湮灭来解决强子物理的基本问题。 在大范围的立体角和粒子动量下，优秀的粒子识别（PID）对于实现丰富的物理计划目标至关重要。 靶区的带电粒子PID将由圆柱形DIRC（内部反射切连科夫光探测）计数器提供。 圆柱形DIRC覆盖极角范围为22-140度，将为最高3.5 GeV/c的带电粒子动量提供至少3个标准偏差的$\pi/K$分离能力。 圆柱形DIRC的设计包括由合成熔融石英制成的窄辐射条、创新的多层球面透镜聚焦系统、棱镜形状的合成熔融石英膨胀体积，以及用于检测切连科夫光子的击中位置和到达时间的寿命增强型微通道板光电倍增管（MCP-PMT）阵列。 进行了详细的蒙特卡洛模拟，并开发了重建方法以研究系统性能。 在CERN PS的混合强子束中，通过系统原型验证了设计和性能的所有关键方面。 2020年，PANDA圆柱形DIRC项目从设计阶段进入组件制造阶段。 2021年，熔融石英条的系列生产成功完成，MCP-PMT的交付工作于2022年5月开始。 显示英文摘要

摘要： The PANDA experiment at the international accelerator Facility for Antiproton and Ion Research in Europe (FAIR), Darmstadt, Germany, will address fundamental questions of hadron physics using $\bar{p}p$ annihilations. Excellent Particle Identification (PID) over a large range of solid angles and particle momenta will be essential to meet the objectives of the rich physics program. Charged PID in the target region will be provided by a Barrel DIRC (Detection of Internally Reflected Cherenkov light) counter. The Barrel DIRC, covering the polar angle range of 22-140 degrees, will provide a $\pi/K$ separation power of at least 3 standard deviations for charged particle momenta up to 3.5 GeV/c. The design of the Barrel DIRC features narrow radiator bars made from synthetic fused silica, an innovative multi-layer spherical lens focusing system, a prism-shaped synthetic fused silica expansion volume, and an array of lifetime-enhanced Microchannel Plate PMTs (MCP-PMTs) to detect the hit location and arrival time of the Cherenkov photons. Detailed Monte-Carlo simulations were performed, and reconstruction methods were developed to study the performance of the system. All critical aspects of the design and the performance were validated with system prototypes in a mixed hadron beam at the CERN PS. In 2020 the PANDA Barrel DIRC project advanced from the design stage to component fabrication. The series production of the fused silica bars was successfully completed in 2021 and delivery of the MCP-PMTs started in May 2022.