The PANDA experiment at the future Facility for Antiproton and Ion Research (FAIR) in Darmstadt/Germany aims to investigate fundamental questions of hadron physics. PANDA is designed as a fixed-target experiment for an antiproton beam with a momentum range of 1.5 GeV/[Formula: see text] to 15 GeV/[Formula: see text]. In order to obtain an excellent particle identification of pions and kaons, two independent DIRC detectors have been developed for two adjacent spatial regions. The Barrel DIRC covers polar angles from [Formula: see text]–[Formula: see text] and performs [Formula: see text] separation with [Formula: see text] or more for momenta from 0.5 to 3.5 GeV/[Formula: see text]. The novel Endcap Disc DIRC (EDD) detector will cover the forward polar angles between [Formula: see text] and [Formula: see text] and will provide a [Formula: see text] separation from 0.5 GeV/[Formula: see text] up to 4 GeV/[Formula: see text] with a separation power at least [Formula: see text]. The design of the Barrel DIRC is based on the successful BaBar DIRC and the SuperB FDIRC R&D with several improvements to optimize the performance for PANDA. Both PANDA DIRC detectors use synthetic fused silica as material for radiators and light guides and lifetime-enhance Microchannel Plate PMTs (MCP-PMTs) as sensors. The Barrel DIRC uses narrow bars as a radiator, a prism-shaped expansion volume and a complex multi-layer spherical lens as focusing system. The Cherenkov radiator for the EDD is a large, 2 cm thick fused silica plate that is divided into four identical quadrants. A combination of bars and cylindrical elements with aluminum coating focus the Cherenkov light on the MCP-PMTs with segmented anode plates.The technical design of the two DIRC detectors and the performance of prototypes, tested in a mixed hadron beam at CERN, will be discussed.

中文翻译：

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PANDA 中用于颗粒识别的筒体和端盖 DIRC 探测器的设计

在德国达姆施塔特未来的反质子和离子研究设施 (FAIR) 进行的 PANDA 实验旨在研究强子物理学的基本问题。PANDA 被设计为反质子束的固定目标实验，动量范围为 1.5 GeV/[公式：见正文] 到 15 GeV/[公式：见正文]。为了获得出色的介子和介子粒子识别，已经为两个相邻的空间区域开发了两个独立的 DIRC 检测器。Barrel DIRC 涵盖从 [公式：见文本]-[公式：见文本] 的极角，并执行 [公式：见文本] 分离 [公式：见文本] 或更多的动量从 0.5 到 3.5 GeV/[公式：见文本]。新颖的 Endcap Disc DIRC (EDD) 检测器将覆盖 [公式：见文本] 和 [公式：见文本] 之间的正向极角，并将提供 [公式：见正文] 分离从 0.5 GeV/[公式：见正文] 到 4 GeV/[公式：见正文]，分离能力至少为 [公式：见正文]。Barrel DIRC 的设计基于成功的 BaBar DIRC 和 SuperB FDIRC 研发，并进行了多项改进以优化 PANDA 的性能。两种 PANDA DIRC 探测器均使用合成熔融石英作为散热器和光导材料，并使用延长寿命的微通道板 PMT (MCP-PMT) 作为传感器。Barrel DIRC使用窄条作为辐射体，棱镜形膨胀体积和复杂的多层球面透镜作为聚焦系统。EDD 的切伦科夫辐射器是一块 2 厘米厚的大型熔融石英板，分为四个相同的象限。