We describe a novel method to use a scintillating fiber detector similar to the Fast Annihilation Cryogenic Tracking (FACT) used at the antimatter experiment AEg over bar IS to monitor the presence of ortho-positronium. A single scintillating fiber was coupled to a photomultiplier tube and irradiated by flashes of about 6 x 10(6) gamma quanta with 511 keV energy, produced by approximately 10 ns long positron pulses. The results were used to demonstrate the ability to track the creation and annihilation of ortho-positronium atoms over time in cryogenic and highly magnetic environments by using the FACT detector as a "digital calorimeter ".
A fiber detector to monitor ortho-Ps formation and decay / Rienaecker, B; Brusa, Rs; Caravita, R; Mariazzi, S; Penasa, L; Pino, F; Ranum, Oa; Nebbia, G. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 1027:(2022), p. 166275. [10.1016/j.nima.2021.166275]
A fiber detector to monitor ortho-Ps formation and decay
Brusa, RS;Caravita, R;Mariazzi, S;Penasa, L;
2022-01-01
Abstract
We describe a novel method to use a scintillating fiber detector similar to the Fast Annihilation Cryogenic Tracking (FACT) used at the antimatter experiment AEg over bar IS to monitor the presence of ortho-positronium. A single scintillating fiber was coupled to a photomultiplier tube and irradiated by flashes of about 6 x 10(6) gamma quanta with 511 keV energy, produced by approximately 10 ns long positron pulses. The results were used to demonstrate the ability to track the creation and annihilation of ortho-positronium atoms over time in cryogenic and highly magnetic environments by using the FACT detector as a "digital calorimeter ".I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
