Particle identification with DIRCs at PANDA

Düren M, Ali A, Belias A, Dzhygadlo R, Gerhardt A, Krebs M, Lehmann D, Peters K, Schepers G, Schwarz C, Schwiening J, Traxler M, Schmitt L, Böhm M, Lehmann A, Pfaffinger M, Stelter S, Uhlig F, Etzelmüller E, Föhl K, Hayrapetyan A, Kreutzfeld K, Rieke J, Schmidt M, Wasem T, Sfienti C (2019)

Publication Type: Journal article

Publication year: 2019

Journal

DOI: 10.1016/j.nima.2019.04.068

Abstract

The DIRC technology (Detection of Internally Reflected Cherenkov light) offers an excellent possibility to minimize the form factor of Cherenkov detectors in hermetic high energy detectors. The PANDA experiment at FAIR in Germany will combine a barrel-shaped DIRC with a disc-shaped DIRC to cover an angular range of 5 to 140 degrees. Particle identification for pions and kaons with a separation power of 3 standard deviations or more will be provided for momenta between 0.5 GeV/c and 3.5 GeV in the barrel region and up to 4 GeV/c in the forward region. Even though the concept is simple, the design and construction of a DIRC is challenging. High precision optics and mechanics are required to maintain the angular information of the Cherenkov photons during multiple internal reflections and to focus the individual photons onto position sensitive photon detectors. These sensors must combine high efficiencies for single photons with low dark count rates and good timing resolution at high rates. The choice of radiation hard fused silica for the optical material and of MCP-PMT photon sensors is essential for DIRC detectors to survive in an environment of radiation and strong magnetic field. The two DIRC detectors differ in the focusing optics, in the treatment of chromatic dispersion and in the electronic readout systems. The technical design of the two DIRC detectors and their validation by testing prototypes in a mixed particle beam at CERN are presented.

Authors with CRIS profile

Involved external institutions

Justus-Liebig-Universität Gießen Germany (DE) GSI Helmholtzzentrum für Schwerionenforschung GmbH Germany (DE) Facility for Antiproton and Ion Research in Europe GmbH (FAIR GmbH) Germany (DE) Johannes Gutenberg-Universität Mainz (JGU) Germany (DE)

How to cite

APA:

Düren, M., Ali, A., Belias, A., Dzhygadlo, R., Gerhardt, A., Krebs, M.,... Sfienti, C. (2019). Particle identification with DIRCs at PANDA. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. https://doi.org/10.1016/j.nima.2019.04.068

MLA:

Düren, M., et al. "Particle identification with DIRCs at PANDA." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (2019).

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