We present the commissioning of the Fast Annihilation Cryogenic Tracker detector (FACT), installed around the antihydrogen production trap inside the 1 T superconducting magnet of the AEgIS experiment. FACT is designed to detect pions originating from the annihilation of antiprotons. Its 794 scintillating fibers operate at 4 K and are read out by silicon photomultipliers (MPPCs) at near room temperature. FACT provides the antiproton/antihydrogen annihilation position information with a few ns timing resolution. We present the hardware and software developments which led to the successful operation of the detector for antihydrogen detection and the results of an antiproton-loss based efficiency assessment. The main background to the antihydrogen signal is that of the positrons impinging onto the positronium conversion target and creating a large amount of gamma rays which produce a sizeable signal in the MPPCs shortly before the antihydrogen signal is expected. We detail the characterization of this background signal and its impact on the antihydrogen detection efficiency

A cryogenic tracking detector for antihydrogen detection in the AEgIS experiment

Prevedelli, M.;
2020

Abstract

We present the commissioning of the Fast Annihilation Cryogenic Tracker detector (FACT), installed around the antihydrogen production trap inside the 1 T superconducting magnet of the AEgIS experiment. FACT is designed to detect pions originating from the annihilation of antiprotons. Its 794 scintillating fibers operate at 4 K and are read out by silicon photomultipliers (MPPCs) at near room temperature. FACT provides the antiproton/antihydrogen annihilation position information with a few ns timing resolution. We present the hardware and software developments which led to the successful operation of the detector for antihydrogen detection and the results of an antiproton-loss based efficiency assessment. The main background to the antihydrogen signal is that of the positrons impinging onto the positronium conversion target and creating a large amount of gamma rays which produce a sizeable signal in the MPPCs shortly before the antihydrogen signal is expected. We detail the characterization of this background signal and its impact on the antihydrogen detection efficiency
Amsler, C.; Antonello, M.; Belov, A.; Bonomi, G.; Brusa, R.S.; Caccia, M.; Camper, A.; Caravita, R.; Castelli, F.; Comparat, D.; Consolati, G.; Demetrio, A.; Di Noto, L.; Doser, M.; Ekman, P.A.; Fanì, M.; Ferragut, R.; Gerber, S.; Giammarchi, M.; Gligorova, A.; Guatieri, F.; Hackstock, P.; Haider, D.; Haider, S.; Hinterberger, A.; Kellerbauer, A.; Khalidova, O.; Krasnický, D.; Lagomarsino, V.; Malbrunot, C.; Mariazzi, S.; Matveev, V.; Müller, S.R.; Nebbia, G.; Nedelec, P.; Nowak, L.; Oberthaler, M.; Oswald, E.; Pagano, D.; Penasa, L.; Petracek, V.; Prelz, F.; Prevedelli, M.; Rienaecker, B.; Robert, J.; Røhne, O.M.; Rotondi, A.; Sandaker, H.; Santoro, R.; Storey, J.; Testera, G.; Tietje, I.C.; Toso, V.; Wolz, T.; Wuethrich, J.; Yzombard, P.; Zimmer, C.; Zurlo, N.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/728844
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