Journal article

Publication year: 2023

Journal: Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Volume number: 1056

ISSN: 0168-9002

eISSN: 1872-9576

DOI Link: https://doi.org/10.1016/j.nima.2023.168697

Publisher: Elsevier

Abstract: 

The High Acceptance Dielectron Spectrometer (HADES) situated at GSI Darmstadt, Germany, has recently upgraded its gaseous ring imaging Cherenkov (RICH) detector. Studying the properties of the hot and dense fireballs produced in heavy ion collisions the RICH is the key component to efficiently identify electrons and positrons emitted therein. The new photon detection plane is comprised of 428 multianode photo electron multipliers (MAPMT)(Hamamatsu H12700) partly coated with p-Terphenyl as a wavelength shifter. It is operated with a gaseous C4H10 (isobutane) radiator making it essentially hadron blind for particle momenta up to approximately 2.5 GeV/c. All 27392 MAPMT channels are read out by an FPGA based readout electronic scheme called DIRICH, which will also be used in other future Cherenkov detectors. The DIRICH readout allows to measure leading and trailing edges for each pixel pulse and hence time over threshold and hit arrival time down to sub-nanosecond precision.

This article will discuss the key features of the upgraded HADES RICH and its performance based on a Ag+Ag run at E = 1.58A GeV incident energy within the FAIR Phase-0 research program.

Harvard Citation style: Becker, M., Duerr, M., Faul, M., Foertsch, J., Friese, J., Hoehne, C., et al. (2023) Performance of the new hadron blind HADES RICH in heavy ion collisions, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1056, Article 168697. https://doi.org/10.1016/j.nima.2023.168697

APA Citation style: Becker, M., Duerr, M., Faul, M., Foertsch, J., Friese, J., Hoehne, C., Kampert, K., Lebedev, S., Michel, J., Otto, J., Patel, V., Pauly, C., Pfeifer, D., Schwab, E., Traxler, M., & Weber, A. (2023). Performance of the new hadron blind HADES RICH in heavy ion collisions. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 1056, Article 168697. https://doi.org/10.1016/j.nima.2023.168697