The Stereoscopic Analog Trigger of the MAGIC Telescopes

The current generation of ground-based imaging atmospheric Cherenkov telescopes (IACTs) operate in the very-high-energy (VHE) domain from ~100 GeV to TeV. They use electronic digital trigger systems discern light flashes emitted by extensive air showers (EASs), overwhelming night sky (LoNS) background. Near telescope energy threshold, number photons gamma-ray-induced EASs is comparable fluctuations LoNS and photon distribution at Cherenkov-imaging camera plane becomes patchy. This results a severe loss effectiveness triggers based on combinatorial logic thresholded signals. A stereoscopic analog system has been developed for improving detection capabilities Major Atmospheric Gamma-ray Imaging (MAGIC) lowest energies. It sum photosensor electrical In this article, architectural design, technical performances, configuration trigger, dubbed “Sum-Trigger-II,” are described.