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

宇宙线现象并行分布式模拟及数据分析系统

• 批准号: 06640414
• 负责人: KASAHARA Katsuaki
• 金额: $ 1.47万
• 依托单位: Kanagawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06640414/
• 关键词: cosmic ray; Monte-Carlo; Atmospheric Neutrino; air shower; GZK cutoff; GZKカットオフ; Cosmos; モンテ・カルロ・シミュレーション; 宇宙線現象; モンテカルロ・シミュレーション; 分散並列処理

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.

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的主页已经建立在http://cpsun4.b6.kanagawa-u.ac.jp/-kasahara/and，邮件列表也可用。

项目成果

K.Kasahara: "The LPM and geomagnetic effects on the development of air showers in the GZK cutoff region" Proceedings of Intevnational Symposium on Extromoly High Energy Cosmic Rays : Agtroplysrs and Future Onservatorles. 221-230 (1997)

K.Kasahara：“LPM 和地磁效应对 GZK 截止区域空气簇射的发展”，极高能宇宙线国际研讨会论文集：Agtroplysrs 和 Future Onservatorles。

K.kasahara: "Introduction to Cosmos and Some Kelevauce to Uitra High Energy Cosmic Ray Air Shauers" Proc.of 24th Iut.Cosmic Ray Conf. Romc. 1. 399-402 (1996)

K.kasahara：“宇宙简介和 Uitra 高能宇宙射线空气 Shauers 的一些 Kelevauce”Proc.of 24th Iut.Cosmic Ray Conf。

K.kasahara: "The LPH and geomaghetic effects on the dwelopmeut of air showers in the GZK autoff vegion" Proc.of Iut.Sympo. on Extremely High Euergg Cosuic Rays. 221-230 (1997)

K.kasahara：“LPH 和地磁效应对 GZK autoff vegion 空气簇射的影响”Proc.of Iut.Sympo。

K.Kasahara: "Introduction to Cosmos and Some Relevance to Ultra High Energy Cosmic Ray Air Showers" Proc.of 24th Int.Cosmic Ray Conf.Roma. vol.1. 399-402 (1996)

K.Kasahara：“宇宙简介以及超高能宇宙射线空气簇射的一些相关性”第 24 届罗马国际宇宙射线会议论文集。

K.Kasahara: "The LPM and geomagnetic effects on the development of air showers in the GZK cutoff region" Energy Cosmic Rays, Edited by Nagano. 221-230 (1997)

K.Kasahara：“LPM 和地磁效应对 GZK 截止区域空气簇射的发展”，能量宇宙射线，长野编辑。