Observation of Solar Neutron at Mt.Chacaltaya on the equator

赤道查卡尔塔亚山太阳中子观测

• 批准号: 05045020
• 负责人: MATSUBARA Yutaka
• 金额: $ 2.56万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05045020/
• 关键词: Solar neutron; Chacaltaya; Charge discrimination; Energy mesurement; Simulation; Accelerator experiment; Maintenace; Next solar cycle; ワークステーション; 8mmテープ; 電子メール; 宇宙線国際会議; 赤道高山; 新方式; 中性子エネルギー; 世界最高感度; 24時間ネットワーク

Observation of neutrons from solar flares can provide unique information on the acceleration of particles to high energies in flares.A new experiment has been in operation since March 1994 at Mt.Chacaltaya, 5200m above sea level and near the equator (16ﾟ21'S and 68ﾟ08'W) in Bolivia. The height and the location of Chacaltaya provide excellent conditions for detecting solar neutrons. In fact the Chacaltaya telescope is 8 times more sensitive than the #2 telescope at Mt.Norikura, which was built in 1992 by Solar-Terrestrial Environment Laboratory. Furthermore, the Chacaltaya telescope observes the Sun when the Norikura detectors enter the night side. More telescopes are planed to cover the earth with a new network system.There are two distinguishable characteristics of the Chacaltaya experiment. One is that the energy of the incident neutrons is measured. This allows to determine the energy spectrum of the neutrons at the Sun as a function of time. Another is that neutrons are discriminat … More ed from charged particles, which is not possible by conventional neutron monitors.In this project, the telescope was constructed and the experiment started in fiscal year of 1993. The day to day operation of the Chacaltaya experiment is carried out by the Bolivian scientists. In fiscal year of 1994, it was realized to copy data obtained at Chacaltaya to the hard disk of the workstation, which belongs to Universidad Mayor de San Andres. And the maintenance of an operation and an analysis became more sophisticated. In fiscal year of 1995, the operation at Chacaltaya was checked twice by two Japanese staffs. It is now confirmed again that the operation of the telescope at Chacaltaya is maintained by the Bolivian scientists and technicians and data are sent to Japan every month after being copied at Universidad Mayor de San Andres. The performances of the Chacaltaya detector was also calibrated by an accelerator in fiscal year of 1995.More than fruitful results are expected in the next solar cycle which is estimated to begin at the end of 1997. Less

观测太阳耀斑中的中子可以提供关于耀斑中粒子加速到高能的独特信息。一项新的实验自1994年3月以来一直在玻利维亚的查卡尔塔亚山上进行，该山海拔5200米，赤道附近(16ﾟ21‘S和68ﾟ08’W)。恰卡尔塔亚的高度和位置为探测太阳中子提供了极好的条件。事实上，Chacaltaya望远镜的灵敏度比Norikura的2号望远镜高8倍，后者是由日地环境实验室于1992年建造的。此外，当Norikura探测器进入黑夜一侧时，Chacaltaya望远镜可以观测太阳。更多的望远镜计划用一个新的网络系统覆盖地球。Chacaltaya实验有两个明显的特点。一种是测量入射中子的能量。这使得可以确定太阳上中子的能谱作为时间的函数。另一种是中子在…上受到歧视更多的来自带电粒子，这是传统的中子监测器不可能做到的。在这个项目中，望远镜被建造起来，实验于1993财政年度开始。查卡尔塔亚实验的日常操作是由玻利维亚科学家进行的。在1994财政年度，实现了将查卡尔塔亚获得的数据复制到属于圣安德烈斯大学市长的工作站的硬盘上。操作和分析的维护变得更加复杂。在1995财政年度，两名日本工作人员对恰卡尔塔亚的业务进行了两次检查。现在再次证实，查卡尔塔亚的望远镜由玻利维亚科学家和技术人员维护，数据在圣安德烈斯大学市长复制后每月发送到日本。Chacaltaya探测器的性能也在1995财政年度由加速器进行了校准。在预计于1997年底开始的下一个太阳周期中，预计会有更多的成果。较少

项目成果

Muraki,Y.,et al.: "Solar Neutron Events of June 4th and 6th,1991-20sec acceleration or 5 min acceleration?-" Proceedings of Kofu Symposium (1993),edited by S.Enoma and T.Hirayama,NRO Reports. 360. 267-270 (1994)

Muraki,Y.,et al.：“1991 年 6 月 4 日和 6 日的太阳中子事件 - 20 秒加速还是 5 分钟加速？-”甲府研讨会论文集（1993 年），由 S.Enoma 和 T.Hirayama 编辑，NRO 报告

Muraki,Y.,et al.: "The Properties of Norikura Solar Neutron Telescope #2" Proc.23rd Int.Cosmic Ray Conf.,Calgary (1993). 3. 171-174 (1993)

Muraki,Y.,et al.：“Norikura 太阳中子望远镜的特性

Muraki, Y., et al.: "Solar Neutron Events of June 4th and 6th, 1991 -20 sec acceleration or 5 min acceleration? -" Proceedings of Kofu Symposium (1993), edited by S.Enome and T.Hirayama, NRO Reports. 360. 267-270 (1994)

Muraki, Y., 等人：“1991 年 6 月 4 日和 6 日的太阳中子事件 -20 秒加速还是 5 分钟加速？ -” 甲府研讨会论文集 (1993)，由 S.Enome 和 T.Hirayama 编辑，NRO

Matsubara,Y.,et al.: "New Bolivia Solar Neutron Telescope" Conference Papers 23rd International Cosmic Ray Conference,Calgary,Canada(1993). 3. 139-142 (1993)

Matsubara,Y.,et al.：“新玻利维亚太阳中子望远镜”会议论文第 23 届国际宇宙射线会议，加拿大卡尔加里（1993 年）。

松原豊: "太陽中性子" 宇宙線研究所研究会 超高エネルギー天文学-viewgraph集-. (発表予定).

Yutaka Matsubara：“太阳中子”宇宙线研究所研究组超高能天文学 - Viewgraph Collection - （待展示）。