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Selective acceleration in impulsive solar flares
Wang, DY
AbstractA plasma acceleration mechanism is proposed to explain the dramatic enhancement in the ratio of He-3/He-4, (enhancement factor 10(2)-10(3)) observed in solar He-3-rich Bares. Considering that coronal plasma is mainly composed of hydrogen and helium ions, the hydrogen ion-helium ion hybrid waves and quasi-perpendicular waves can be excited by energetic electron beam during the impulsive solar Bares. The frequencies of these waves are close to the He-3(++) ion gyrofrequency, but far from the He-4(++) ion gyrofrequency. Most of these waves are selectively absorbed by He-3 ions. These preheated 3He ions can be successively stochastic accelerated by Alfven turbulence, when their velocities are larger than the local Alfven velocity. It makes the ratio of He-3/He-4 dramatically enhanced and the acceleration energy spectrum of He-3 ions forms a power-law distribution during the impulsive solar Bares.
Subject AreaPhysics
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000171669500045
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Wang, DY. Selective acceleration in impulsive solar flares[J]. CHINESE PHYSICS LETTERS,2001,18(9):1291-1293.
APA Wang, DY.(2001).Selective acceleration in impulsive solar flares.CHINESE PHYSICS LETTERS,18(9),1291-1293.
MLA Wang, DY."Selective acceleration in impulsive solar flares".CHINESE PHYSICS LETTERS 18.9(2001):1291-1293.
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