Parallel and Distributed Simulation of Cosmic Ray Phenomena and Data Analysis System

该项目的目标之一是将在主框架上开发的Cosmos代码移植到UNIX环境中，以提高可靠性并促进其在广泛领域的研究人员的使用。利用矢量处理器对级联现象进行蒙特卡罗模拟，通常难以获得较高的性能。我们的目标是不使用专用的并行处理器，而是使用普通工作站的分布式处理来执行高速计算。Cosmos是一个多功能代码，用于模拟和研究宇宙射线在大气中的传播，例如神冈小组在大气中微子中观察到的异常现象，以及Greisen-Zatsepin-Kuzmin截止区域的空气簇射。为了能够在如此高的能量下得到可靠的结果，我们精确地结合了朗多-波美兰楚克-米格达尔效应、磁轫致和对产生。宇宙密码已被许多研究人员接受，包括日本、中国、美国、加拿大、巴西、印度和欧罗巴的一些国家。Cosmos已应用于上述中微子观测、反质子观测、初级电子观测、西藏等山区的空气阵雨观测、切伦科夫光、望远镜阵列工程等。Cosmos的主页已建立在http://cpsun4.b6.kanagawa-u.ac.jp/-kasahara/and，邮件列表也已提供。

One of the aims of the project is to port a code, Cosmos, developed on a main frame to the UNIX environment, to enhance the reliability and to facilitate its use to researchers in a wide area.It is generally difficult to get high performance of Monte-Carlo simulations of cascade phenomena by using vector processors. It is also our aim to perform high speed computation not with a dedicated parallel processor but with distributed processing by ordinary workstations.Cosmos is a versatile code for simulating and investigating the propagation of cosmic rays in the atmosphere such as the anomaly observed in atmospheric neutrinos by the Kamioka group as well as air showers in the Greisen-Zatsepin-Kuzmin cutoff region. To be able to get reliable results in such high energies, we incorporated the Landau-Pomeranchuk-Migdal effect, magnetic bremstrahlung and pair creation accurately.The Cosmos code has been accepted by many researchers including Japan, China, USA,Canada, Brazil, India, a few countries in Europa. Cosmos has been applied to the above mentioned neutrino observation, observation of anti-protons, primary electrons, air showers at mountains such as in Tibet, Cerenkov light, Telescope Array project, etc.Cosmos home page has been established inhttp : //cpsun4.b6.kanagawa-u.ac.jp/-kasahara/and the mailing list is aslo available.