Journal article

Publication year: 2020

Journal: International Journal of Modern Physics A

Volume number: 35

Issue number: 34-35

ISSN: 0217-751X

eISSN: 1793-656X

DOI Link: https://doi.org/10.1142/S0217751X20440200

Publisher: World Scientific Publishing

Abstract: 
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/c to 15 GeV/c. 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 22 degrees-140 degrees and performs /K separation with 3 sigma or more for momenta from 0.5 to 3.5 GeV/c. The novel Endcap Disc DIRC (EDD) detector will cover the forward polar angles between 5 degrees and 22 degrees and will provide a pi/K separation from 0.5 GeV/c up to 4 GeV/c with a separation power at least 3 sigma. 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.

Harvard Citation style: Koeseoglu, I. (2020) Design of the barrel and endcap DIRC detectors for particle identification in PANDA, International Journal of Modern Physics A, 35(34-35), Article 2044020. https://doi.org/10.1142/S0217751X20440200

APA Citation style: Koeseoglu, I. (2020). Design of the barrel and endcap DIRC detectors for particle identification in PANDA. International Journal of Modern Physics A. 35(34-35), Article 2044020. https://doi.org/10.1142/S0217751X20440200