Analysis of Particle Flux and Calculations of Radiation Dose during Solar Proton Events in 2012 from ARTEMIS Observations

• Main Authors: Guan-JieLin, 林冠傑
• Other Authors: Wing-Yee Tam
• Format: Others
• Language: en_US
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/97095555910704040281

碩士 === 國立成功大學 === 太空與電漿科學研究所 === 104 === The year 2012 has been a year which is active in solar-activity due to the approaching of the solar maximum year. The solar proton event (SPE) occurred on March 7^th, 2012 is the strongest SPE for the past twelve years. Although solar proton events are usually referred to a substantial increase of protons flux measured by Geostationary Operational Environmental Satellite (GOES) at an energy level larger than 10 MeV, the observations from the Acceleration, Reconnection, Turbulence, and Electrodynamics of the Moon's Interaction with the Sun (ARTEMIS) mission show that the differential energy fluxes increase at all energy channels of Electrostatic Analyzers (ESA) and Solid State Telescopes (SST), which cover a wide range below MeV. This probably means that the solar proton events can affect to the Earth's deep magnetotail and produce the secondary particles as the primary particles passing through the spacecraft. The pitch-angle distributions associated with the increase of differential energy fluxes are also explored to learn their coming directions. Furthermore, the risks of radiation doses that astronauts and satellites would take from particles are calculated from the measured flux during the solar proton events.