Disc DIRC endcap detector for PANDA@FAIR

• DOI: 10.1016/j.nima.2008.07.096
• Publication Date: 2008-07-21T08:02:06Z
• Authors: Peter Schönmeier; Derek Branford; Michael Düren; Markus Ehrenfried; Wolfgang Eyrich; Klaus Föhl; Matthias Hoek; Ralf Kaiser; Albert Lehmann; Shaojun Lu; Oliver Merle; Björn Seitz; Georg Schepers; Roland Schmidt; Carsten Schwarz
• Keywords: 0103 physical sciences; 01 natural sciences; 7. Clean energy

In the PANDA experiment at FAIR, a Disc DIRC detector is foreseen to realize particle identification in the endcap region of the detector. Two different designs are proposed. One is based on a two-dimensional readout of space coordinates, the other one is based on one space coordinate and the readout of the Time-of-Propagation (ToP). The ToP-DIRC design uses dichroic mirrors to split the spectral range of the Cherenkov photons into two ranges. This allows to reduce dispersion effects and increases the travel path of the photons inside the radiator. A larger ToP helps in discriminating different particle species at large momenta.