摘要
Solar energetic particles(SEPs)are accelerated in corona at an early phase of solar energetic particle events(SEPE).The acceleration mechanism of SEPs in corona can only be inferred from an analysis of multi-band observational data,as the observation of SEPs is usually made around 1AU.In this context,people have investigated spectrums,charge state,solar release time(SRT),and multi-band data of SEPEs,in an attempt to judge the acceleration mechanism of SEPs.The SRT computation of SEPs is an important and commonly used approach to study the acceleration mechanism of SEPs in corona.This paper reviews some important findings concerning the SRT computation of SEPs,and analyzes different merits of each approach for such calculation,based on a range of SEPE case studies.This paper also analyzes and discusses both possible and actual acceleration mechanisms of a number of SEPEs,by calculating the SRT of the SEPEs.Finally,the paper summarizes the possible problems in studying an acceleration mechanism of SEPEs inferred from the SRT of SEP.
基金
the National Natural Science Foundation of China(Grant Nos.50677020,10333040 and 10373017)
the Science and Technology Diffusion Program of China Meteorological Administration(Grant No.CMATG2007M03)
