33ND INTERNATIONAL COSMIC RAY CONFERENCE, RIO DE JANEIRO 2013 THE ASTROPARTICLE PHYSICS CONFERENCE Hybrid measurement of cosmic rays at the knee region with LHAASO

site is an ideal location for energy spectrum and composition measurements for cosmic rays above 50TeV because developing maxima of air showers are 1-2km above the ground. The LHAASO project consists of several large area detector arrays which own different detection methods: KM2A (one km2 Array) can measure charged particles and muons, WCDA(Water Cherencov Detector Array) can measure muons, WFCTA(Wide Field Cherenkov Telescopes Array) can measure Cherenkov lights, SCDA(Shower Core Detectors Array) can measure gamma family from pion0 at the shower cores, and PRISMA(PRImary Spectrum Measurement Array) can measure thermal neutron from pion+ and pion- at the shower cores. By advantage of these powerful hybrid detections, LHAASO is expected to offer measurement of cosmic ray spectrum and composition with high accuracy. In this presentation, a simulation of the hybrid shower detections is carried out for investigating the performance of the detection in the LHAASO array