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Cosmic Ray Modulation Studies Using Neutron Monitor and Spacecraft Detectors Near the Earth

使用地球附近的中子监测器和航天器探测器进行宇宙射线调制研究

基本信息

批准号：
0002744
负责人：
John Lockwood
金额：
$ 8.29万
依托单位：
University of New Hampshire
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2000
资助国家：
美国
起止时间：
2000-08-01 至 2003-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0002744&HistoricalAwards=false
关键词：
Cosmic Ray Modulation Studies Using

项目摘要

Abstract: ATM 00-02744Proposal Title: Cosmic Ray Modulation Studies Using Neutron Monitor and Spacecraft Detectors Near the EarthPrincipal Investigator: John A. Lockwood, University of New Hampshire The investigators will study cosmic ray solar modulation near the Earth during the coming solar maximum and consequent reversal of the solar magnetic field. The main effort is to continue operation of the Mount Washington neutron monitor, and to employ the data obtained, together with data from other neutron monitors and spacecraft to compare the onset of the current modulation cycle with previous cosmic ray modulation cycles. Galactic cosmic ray fluxes vary, or are "modulated" in response to changes in the interplanetary magnetic environment, which in turn derives from the magnetic activity on the surface of the Sun. This magnetic activity is most manifest in the cycle of sunspots and solar flares lasting approximately eleven years. However the polarity of the magnetic field reverses every sunspot cycle, so the true magnetic cycle spans 22 years. Only two magnetic cycles have been observed with high accuracy particle detectors like the neutron monitor on Mount Washington, which has operated continuously from 1954 to the present. The investigators will also study solar cosmic ray events in collaboration with colleagues at the University of Bern, Switzerland.

摘要：ATM 00- 02744提案标题：利用地球附近的中子监测器和航天器探测器进行宇宙射线调制研究。洛克伍德，新罕布什尔州大学研究人员将研究在即将到来的太阳极大期和随之而来的太阳磁场逆转期间地球附近的宇宙射线太阳调制。主要工作是继续运行华盛顿山中子监测器，并利用所获得的数据，连同其他中子监测器和航天器的数据，将当前调制周期的开始与以前的宇宙射线调制周期进行比较。银河系宇宙线的通量会随着行星际磁场环境的变化而变化，或者说是被“调制”，而行星际磁场环境又来自太阳表面的磁场活动。这种磁活动在持续约十一年的太阳黑子和太阳耀斑周期中最为明显。然而，磁场的极性在每个太阳黑子周期都会反转，因此真正的磁场周期跨越22年。从1954年到现在，只有两个磁周期被高精度的粒子探测器观测到，比如华盛顿山上的中子监测器。研究人员还将与瑞士伯尔尼大学的同事合作研究太阳宇宙射线事件。