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.

宇宙射线通量与太阳活性水平（太阳调制）之间的抗相关性是由太阳风携带的磁场不规则性引起的，太阳风将带电的颗粒从太阳系中扫除并/或减速。 由于电子和核的电荷/质量比大大不同，因此这两个粒子物种的速度和磁性刚度的关系显着不同。 最近的观察结果表明，当前调制模型同时重现电子和核子调制的失败与每11年发生的太阳磁场的逆转有关。 如果Heliospheric磁场具有远距离顺序，则宇宙射线颗粒电荷的符号可能会影响它们的传播。 对所涉及的对称性的详细考虑表明，当太阳能场逆转时，电荷依赖性应改变。 该研究计划旨在通过比较该赠款中要获得的电子数据与电子数据获得的电子数据的质子数据，从我们的iCe航天器上获得的质子数据以及文献中的其他数据来扩展宇宙射线太阳能调制的电荷依赖性。 这项研究将确定在确定地球层中带电颗粒的轨迹的高度大规模阶段重要程度。