The all particle energy spectrum at energies > 50 TeV is measured using the lateral distributions of electrons, muons and Cherenkov photons. The data are from the HEGRA airshower array at ORM, La Palma. The energy spectrum is obtained using a regularised unfolding of the data on the basis of the Monte Carlo code CORSIKA. Different model inputs allow an estimate of systematic uncertainties. The ...

The ASTRI (Astrofisica con Specchi a Tecnologia Replicante Italiana) Project led by the Italian National Institute for Astrophysics (INAF) is developing and will deploy at Observatorio del Teide mini-array (ASTRI Mini-Array) composed of nine telescopes similar to small-size dual-mirror Schwarzschild-Couder telescope (ASTRI-Horn) currently operating on slopes Mt. Etna in Sicily. Mini-Array surpa...

The surface detector of the Pierre Auger Observatory is a 1600 water Cherenkov tank array on a triangular 1.5 km grid. The signals from each tank are read out using three 9” photomultipliers and processed at a sampling frequency of 40 MHz, from which a local digital trigger efficiently selects shower candidates. GPS signals are used for time synchronization and a wireless communication system c...

The Antarctic Muon And Neutrino Detector Array (AMANDA) is a high-energy neutrino telescope. It is a lattice of optical modules (OM) installed in the clear ice below the South Pole Station. Each OM contains a photomultiplier tube (PMT) that detects photons of Cherenkov light generated in the ice by muons and electrons. ICECUBE is a cubickilometer-sized expansion of AMANDA currently being built ...

This paper describes two fully programmable systolic processors for second level trigger processing in high energy physics experiments at CERN, Geneva, Switzerland. One of them has been used successfully since spring 1991 at the CERES/NA45 experiment for the recognition of Cherenkov rings in a ring image Cherenkov (RICH) detector. The processor consists of a 1m 2 systolic array of 176160, i.e. ...