Observation of solar neutrons at high altitudes near the equator

赤道附近高海拔地区太阳中子的观测

• 批准号: 16540242
• 负责人: MATSUBARA Yutaka
• 金额: $ 2.3万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16540242/
• 关键词: network of solar neutron detector; high altitude near the equator; particle acceleration; Chacaltaya; Sierra Negra; automatic data taking; solar flare; 2005 September 7; 太陽表面粒子加速; 大陽中性子; 24時間観測網; 赤道付近の高山; 次期太陽活動期の拠点; Linux; メキシコの装置

This research aims to clarify the acceleration mechanism of high energy particles at the solar surface, by observing on the ground high energy solar neutrons (>100MeV) produced by the interaction between accelerated protons and the solar atmosphere. It is more preferable to use neutrons than protons to study solar acceleration, because neutrons are not reflected by the interplanetary magnetic field. In order to detect solar neutrons effectively, the group which mainly includes Solar-Terrestrial Environment Laboratory, Nagoya University, has completed a network of solar neutron detectors in the world to observe the Sun for a whole day. These detectors are located at high mountains near the equator, because solar neutrons are attenuated while propagating in the air. According to the Grant-in-Aid for Scientific Research, the data taking system of the solar neutron detector at Chacaltaya in Bolivia, which was designed more than 15 years ago, has been replaced by a quite a new system, by wh … More ich a data taking starts automatically after a power cut of the electricity. Chacaltaya (altitude : 5250m, latitude : 16 degrees S) is the best place to observe solar neutrons in our network. This experience was useful to adopt the same system to the detector at Sierra Negra in Mexico, where nobody stays permanently. Sierra Negra (altitude : 4600m, latitude : 19 degrees N) the second best place to observe solar neutrons. These new systems are believed to work properly during the next solar cycle, which will start in 2007, and, we bacame to detect solar neutrons much more efficiently than before. While we were improving both systems, a large solar flare occurred on September 7, 2005. The solar neutron detectors both at Chacaltaya and Sierra Negra have succeeded in detecting solar neutron signals, which are the most significant ones so far obtained by our detectors. Moreover, neutron monitors at Chacaltaya and Mexico City also detected clear signals. The analysis on this events is now in progress, but obtaing this kind of event is what we have aimed by this Grant-in-Aid for Scientific Research. Less

这项研究旨在通过观察地面高能太阳中子（> 100mev）在加速质子和太阳大气之间的相互作用产生的地面高能太阳中子（> 100mEV）来阐明高能颗粒的加速机制。比质子比质子更喜欢使用中性元来研究太阳加速度，因为星际磁场不会反射中性。为了有效地检测太阳中子，主要包括太阳能环境实验室，名古屋大学已经完成了世界上太阳中子探测器网络，以观察太阳一整天。这些探测器位于等等器附近的高山，因为太阳中子在空中传播时会衰减。根据科学研究的赠款，在15年前设计的玻利维亚Chacaltaya太阳能中子探测器的数据系统已被一个相当新的系统取代，该系统已被一个相当新的系统所取代。 chacaltaya（高度：5250m，纬度：16度）是观察我们网络中太阳中子的最佳场所。这种经验对于在墨西哥塞拉内格拉（Sierra Negra）的探测器中采用相同的系统很有用，那里没有人永久保留。塞拉内格拉（Sierra Negra）（高度：4600m，纬度：19度N）观察太阳中子的第二好处。人们认为，这些新系统将在下一个太阳周期中正常工作，该太阳能周期将于2007年开始，并且我们比以前更有效地检测太阳中子。虽然我们在改进了这两个系统，但2005年9月7日发生了大型太阳耀斑。查卡尔塔亚（Chacaltaya）和塞拉内格拉（Sierra Negra）的太阳能中子探测器都成功地检测了太阳中性信号，这是我们探测器迄今为止最重要的信号。此外，Chacaltaya和墨西哥城的中子监视器也检测到了明显的信号。对此事件的分析现在正在进行中，但是获得此类事件是我们为科学研究提供的赠款所针对的。较少的

项目成果

Solar neutron events that have been observed in solar cycle 23

太阳周期23中观测到的太阳中子事件

• 发表时间: 2005
• 期刊: Int.J.Mod.Phys.A 20
• 作者: E.Flueckiger;R.Buetikofer;Y.Muraki;Y.Matsubara 他
• 通讯作者: Y.Matsubara 他

Solar neutron events that have been found in solar cycle 23

太阳周期23中发现的太阳中子事件

• 发表时间: 2005
• 期刊: International Journal of Modern Physics A 20・29
• 作者: D.Zhang;Y.Iwasaka;A.Matsuki;et al.;Atsushi Matsuki;Atsushi Matsuki;Atsushi Matsuki;松木 篤;松木 篤;岩坂泰信;Kyoko Watanabe;渡邉 恭子;Toshio Terasawa;Kyoko Watanabe;E.O.Fluckiger
• 通讯作者: E.O.Fluckiger

Possible >10 GeV particle detection in association with the 28 May 2003 solar flare

可能检测到与 2003 年 5 月 28 日太阳耀斑相关的 >10 GeV 粒子

• 发表时间: 2006
• 期刊: Proc.29th Int.Cosmic Ray Conf. (印刷中)
• 作者: T.Sako;Y.Muraki;Y.Matsubara;K.Watanabe 他
• 通讯作者: K.Watanabe 他

Solar Neutron Events of October-November 2003

2003年10月至11月太阳中子事件

• 发表时间: 2006
• 期刊: Astrophysical Journal 636
• 作者: D.Zhang;Y.Iwasaka;A.Matsuki;et al.;Atsushi Matsuki;Atsushi Matsuki;Atsushi Matsuki;松木 篤;松木 篤;岩坂泰信;Kyoko Watanabe
• 通讯作者: Kyoko Watanabe

The giant Forbush decrease in October/November 2003 : Data analysis for the solar neutron detector at Gornergrat

2003 年 10 月/11 月福布什的巨大下降：戈尔内格拉特太阳中子探测器的数据分析

• 发表时间: 2005
• 期刊: Int.J.Mod.Phys.A 20
• 作者: E.O.Flueckiger;R.Buetikofer;A.L.Desorgher;M.R.Moser;Y.Muraki;Y.Matsubara;T Sako;H.Tsuchiya;T.Sakai
• 通讯作者: T.Sakai