HERD is a future experiment for the direct detection of high energy cosmic rays. The instrument is based on a calorimeter optimized not only for a good energy resolution but also for a large acceptance. Each crystal composing the calorimeter is equipped with two read-out systems: one based on wavelength-shifting fibers and the other based on two photodiodes with different active areas assembled in a monolithic package. In this paper, we describe the photodiode read-out system, focusing on experimental requirements, design and estimated performances. Finally, we show how these features lead to the flight model project of the photodiode read-out system.
Photodiode Read-Out System for the Calorimeter of the Herd Experiment / Betti P., Adriani O., Antonelli M., Bai Y., Bai X., Bao T., Berti E., Bonechi L., Bongi M., Bonvicini V., Bottai S., Cao W., Casaus J., Chen Z., Cui X., D'Alessandro R., Detti S., Dong Y., Finetti N., Formato V., et al.. - In: INSTRUMENTS. - ISSN 2410-390X. - ELETTRONICO. - 6:(2022), pp. 33.1-33.7. [10.3390/instruments6030033]
Photodiode Read-Out System for the Calorimeter of the Herd Experiment
Betti P.;Adriani O.;Berti E.;Bongi M.;Bottai S.;D'Alessandro R.;Mori N.;Pacini L.;Starodubtsev O.;Tiberio A.;Vannuccini E.;
2022
Abstract
HERD is a future experiment for the direct detection of high energy cosmic rays. The instrument is based on a calorimeter optimized not only for a good energy resolution but also for a large acceptance. Each crystal composing the calorimeter is equipped with two read-out systems: one based on wavelength-shifting fibers and the other based on two photodiodes with different active areas assembled in a monolithic package. In this paper, we describe the photodiode read-out system, focusing on experimental requirements, design and estimated performances. Finally, we show how these features lead to the flight model project of the photodiode read-out system.
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