The Endcap Disc DIRC of PANDA

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2017-12, Vol.876, p.198-201
• Main Authors: Düren, M., Etzelmüller, E., Föhl, K., Hayrapetyan, A., Kröck, B., Merle, O., Rieke, J., Schmidt, M., Wasem, T., Britting, A., Eyrich, W., Lehmann, A., Pfaffinger, M., Uhlig, F., Belias, A., Dzhygadlo, R., Gerhardt, A., Götzen, K., Kalicy, G., Krebs, M., Lehmann, D., Nerling, F., Patsyuk, M., Peters, K., Schepers, G., Schmitt, L., Schwarz, C., Schwiening, J., Traxler, M., Zühlsdorf, M., Cowie, E., Keri, T., Achenbach, P., Cardinali, M., Hoek, M., Lauth, W., Schlimme, S., Sfienti, C., Thiel, M.
• Format: Article
• Language: English
• Subjects: Cherenkov detector; DIRC; MCP-PMT; Particle Identification
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2017.02.077

The Endcap Disc DIRC (EDD) for PANDA has been designed to identify traversing pions, kaons and protons in the future PANDA experiment. Its central part is a 2cm thick fused silica plate. Focussing optics are attached to the outer rim of the plate, outside of the acceptance of the experiment. Fast, high-resolution MCP-PMTs, designed to register single Cherenkov photons, have been tested in magnetic field. Filters limit the spectral acceptance of the sensors to reduce dispersion effects and to extend their lifetime. A compact and fast readout is realized with ASICs. Analytical reconstruction algorithms allow for fast particle identification. The angular resolution of a DIRC prototype has been simulated in Monte Carlo and confirmed in a test beam. The final detector will be able to provide a 4σπ/K separation up to a momentum of 4GeV/c. [Display omitted] •Design of a high performance Endcap Disc DIRC Cherenkov detector.•Spatial resolution of small pitch MCP-PMT measured in magnetic field.•Test beam results of a DISC DIRC prototype agree with Monte Carlo predictions.