Study on origins of cosmic rays with energies above 10^<16>eV

10^<16>eV以上宇宙线起源研究

• 批准号: 16340068
• 负责人: KAKIMOTO Fumio
• 金额: $ 10.31万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16340068/
• 关键词: Cosmic rays; air showers; acceleration sites; chemical composition; longitudinal development; propagation in the Galaxy; supernova remnant; neutron star; 宇宙線伝播

The purpose of this research is to determine the chemical composition of primary cosmic rays with energies above 10^<16>eV. The observation site is at the laboratory for cosmic ray physics at mount Chacaltaya in Bolivia. This laboratory is situated at 5,200m above the sea level, and then this is the world highest one among the cosmic ray observation sites. In this study we measure equi-intensity curves of cosmic ray air showers. A high altitude experiment enables us to get the curves in wider atmospheric depth. The primary composition reflects deeply on the features of these curves. So that the observed curves are compared with those obtained with a Monte Carlo simulations and then we derive the result.For this study we started to install a new air shower array and finished at the end of 2006. However it took about a half year more for us to reduce the induced noises through the recycled signal cables, which were used at the prior air shower array.From now we observe air showers at least for more five years, and then the final result is obtained.

这项研究的目的是确定能量在10^&lt；16&gt；ev以上的初级宇宙线的化学成分。观测地点位于玻利维亚查卡尔塔亚山的宇宙线物理实验室。这个实验室位于海拔5200米，是世界上最高的宇宙线观测点。在这项研究中，我们测量了宇宙线空气簇射的等强度曲线。高空实验使我们能够在更大的大气深度获得曲线。主要成分深刻地反映了这些曲线的特征。将观测到的曲线与蒙特卡罗模拟得到的曲线进行比较，得出结果。在本研究中，我们开始安装新的空气簇射阵列，并于2006年底完成。然而，我们花了大约半年的时间通过回收的信号电缆来减少诱导的噪音，这些电缆在以前的空气簇射阵列中使用。从现在开始，我们至少观察五年以上的空气簇射，然后得出最终结果。

项目成果

The Energy Spectrum and the Chemical Composition of Primary Cosmic Rays with Energies from 1014 to 1016 eV

能量1014~1016 eV的初级宇宙线的能谱和化学成分

• DOI: 10.1086/422510
• 发表时间: 2004
• 作者: S. Ogio;F. Kakimoto;Y. Kurashina;O. Burgoa;D. Harada;H. Tokuno;H. Yoshii;A. Morizawa;E. Gotoh;H. Nakatani;K. Nishi;S. Shimoda;N. Tajima;Y. Yamada;T. Kaneko;K. Murakami;Y. Toyoda;Y. Matsubara;Y. Mizumoto;Y. Shirasaki;Y. Tsunesada;P. Miranda;A. Velarde
• 通讯作者: A. Velarde

Extension of the BASJE air shower array V

BASJE 风淋室阵列 V 的扩展

• 发表时间: 2006
• 作者: F.;Kakimoto
• 通讯作者: Kakimoto

Measurement plan of the chemical composition of primary cosmic rays with energies above 10^<16> eV by BASJE group

BASJE组能量10^<16>eV以上初级宇宙线化学成分测量方案

• 发表时间: 2006
• 作者: Y.;Tsunesada
• 通讯作者: Tsunesada

高山での空気チェレンコフ光観測による10^<16>eV以上の宇宙線原子核組成測定

高山航空切伦科夫光观测测量10^16eV以上宇宙线核成分

• 发表时间: 2008
• 作者: Y.;Tsunesada;常定芳基;常定芳基
• 通讯作者: 常定芳基

Extension of the BASJE air shower array IV

BASJE 风淋室阵列 IV 的扩展

• 发表时间: 2006
• 作者: F.;Kakimoto
• 通讯作者: Kakimoto