Charge Dependence of Cosmic Ray Solar Modulation

宇宙线太阳调制的电荷依赖性

• 批准号: 8812945
• 负责人: Paul Evenson
• 金额: --
• 依托单位: Bartol Research Institute
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-06-01 至 1991-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8812945&HistoricalAwards=false
• 关键词: Charge; Dependence; Cosmic; Ray; Solar

The anti-correlation between cosmic ray fluxes and the level of solar activity (solar modulation) is caused by magnetic field irregularities carried by the solar wind which sweep the charged particles out of the solar system and/or decelerate them. Since electrons and nuclei have greatly different charge/mass ratios the relation of velocity and magnetic rigidity is significantly different for these two particle species. Recent observations have shown that the failure of the current modulation model simultaneously to reproduce electron and nucleon modulation is related to reversals of the solar magnetic field which occur every eleven years. If the heliospheric magnetic field has long range order the sign of the charge of the cosmic ray particles can affect their propagation. A detailed consideration of the symmetries involved shows that the charge dependence should change when the solar field reverses. This research program is designed to extend measurements of the charge dependence of cosmic ray solar modulation through comparison of electron data to be obtained under this grant with electron an proton data available from our instrument on the ICE spacecraft as well as other data from the literature. This investigation will determine the extent to which the large scale order of the heliospheric magnetic field is important in determining the trajectories of charged particles in the heliosphere.

宇宙线通量与能级的反相关 太阳活动（太阳调制）是由磁场引起的 太阳风携带的不规则物质， 太阳系外的粒子和/或使它们减速。 以来 电子和原子核的电荷/质量比有很大的不同 速度与磁刚度关系显著 这两种粒子是不同的。 最近的观察 已经表明，当前调制模型的失败 同时再现电子和核子调制， 与太阳磁场的逆转有关 每11年。 如果日球磁场长期存在 宇宙射线粒子电荷的符号 会影响它们的繁殖。 详细审议了 所涉及的对称性表明，电荷依赖性应该 当太阳场反转时会发生变化 这项研究计划是 旨在扩展测量的电荷依赖 通过比较电子数据的宇宙线太阳调制 在此授权下获得的电子和质子数据 从我们的ICE航天器上的仪器中可以获得， 来自文献的其他数据。 这次调查将 确定在多大程度上，大规模的秩序， 日光层磁场在确定 带电粒子在日球层的运动轨迹