The Integrated Science Investigation of the Sun (ISIS): Energetic Particle Me Mea- asurements for the Solar Probe Plus Mi surements Mission

摘要

One of the major goals of NASA’s Solar Probe Plus (SPP) mission is to determine the mechanisms that accelerate and transport high celerate high-energy particles from the solar atmosphere out into the heliosphere. Processes such as rocesses coronal mass ejections and solar flares ronal flares, which peak roughly every 11 years around solar maximum, , release huge quant quantities of energized matter ties matter, magnetic fields and electromagnetic radiation into space. The high , high-energy particles, known as solar energetic particles or SEPs, present a serious radiation threat to human explo explorers ers living and working outside low low-Earth orbit and to technological assets such as communications and scientific sate satel- llites in space. This talk describes the Integrated Science Investigation of the Sun (ISIS) lites - Energetic Particle Instr Instru- ument suite. ISIS measures key properties such as intensities, energy spectra, composition, and ment angular distributions of the low low-energy suprathermal source populations, as well as the more hazardous, higher energy pa par- rticles ejected from the Sun. By making the first ticles first-ever direct measurements of the near near-Sun regions where the acceler accelera- ation takes place, I tion ISIS will provide the critical measurements that, when integrated with other SPP instruments and SIS with solar and interplanetary observations, will lead to a revolutionary new understanding of the Sun and major dri driv- vers of solar system space weather.