New simulation method in GZK region

Abstract

We present a new Monte Caro Simulation method of air showers in energy of the GZK region. A full and qusi-full Monte Caro simulation for ultira high energy cosmic ray has been developed in a frame of distributed-parallel processing technique. Various physical quantities in a shower are generated under the methods and stored as a database. To generating an air shower, quantities such as energy ,arrival time angular distribution of individual particles are sampled from the database.