Performance of LACT SiPM camera front-end electronics

doi:10.1088/1748-0221/21/03/P03002

Performance of LACT SiPM camera front-end electronics

2026-03-01

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DOI：10.1088/1748-0221/21/03/P03002

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The Large Array of Imaging Atmospheric Cherenkov Telescope (LACT) will be constructed at the Large High Altitude Air Shower Observatory (LHAASO). It will collaborate with the LHAASO muon detector array to achieve observations of the fine structure of ultra-high energy gamma-ray sources. The camera employs an imaging technique to accurately measure and document the intensity and form of the atmospheric Cherenkov light as it reaches the telescope's focal plane. The LACT camera will utilize large-area silicon photomultiplier (SiPMs) as the photodetectors. The presence of quenching resistors and terminal capacitance lead to a longer recovery time for the avalanche discharge of SiPMs. As the area of the SiPM increases, the output pulse fall time becomes longer. This paper presents various design strategies for low-power, narrow pulse shaping circuits tailored for large-area SiPMs, and it offers a comprehensive comparative analysis of these circuit designs in relation to the LACT camera's design specifications.

Keywords:

Cherenkov detectors

Front-end electronics for detector readout

Large detector systems for particle and astroparticle physics

Performance of LACT SiPM camera front-end electronics

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