Verification of Electromagnetic Calorimeter Concept for the HADES spectrometer

• Published in: Journal of physics. Conference series 2015-04, Vol.599 (1), p.12026
• Main Authors: Svoboda, O, Blume, C, Czy ycki, W, Epple, E, Fabbietti, L, Galatyuk, T, Golubeva, M, Guber, F, Hlavá, S, Ivashkin, A, Kajetanowic, M, Kardan, B, Koenig, W, Kugler, A, Lapidus, K, Linev, S, Lisowski, E, Ott, P, Otte, P, Petukhov, Pietraszko, J, Reshetin, A, Rodríguez-Ramos, P, Rost, A, Salabura, P, Skott, P, Sobolev, Y G, Steffen, O, Thomas, A, Tlustý, P, Traxler, M
• Format: Article
• Language: English
• Subjects: Electronics; Energy resolution; Heavy ions; Ionic collisions; Lead glass; Modules; Particle production; Photomultiplier tubes; Physics
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/599/1/012026

The HADES spectrometer currently operating on the beam of SIS18 accelerator in GSI will be moved to a new position in the CBM cave of the future FAIR complex. Electromagnetic calorimeter (ECAL) will enable the HADES@FAIR experiment to measure data on neutral meson production in heavy ion collisions at the energy range of 2-10 A GeVon the beam of the new accelerator SIS100. Calorimeter will be based on 978 massive lead glass modules read out by photomultipliers and a novel front-end electronics. Secondary gamma beam with energies ranging from 81 MeV up to 1399 MeV from MAMI-C Mainz facility was used to verify selected technical solutions. Relative energy resolution was measured using modules with three different types of photomultipliers. Two types of developed front-end electronics as well as energy leakage between neighbouring modules under parallel and declined gamma beams were studied in detail.