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《Chinese Journal of Geophysics》 1999-S1
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ELECTROSTATIC INSTABILITY EXCITED BY SOLAR FLARE ELECTRON BEAMS IN SOLAR CORONA

WANG XUE-YI HUANG YONG-NIAN ZHOU Gou-CHENG CAO JIN-BIN (Center for Space Science and Applied Research, P. O. Bax 8701, 100080. Beijing, China)  
In this paper, a model is presented for the interaction between solar flare electron beams which consist of a faster cold beam and a slower thermal beam, and coronal plasma. The calculation shows that a electrostatic instability can be excited in this situation. The growth rate of the instability becomes large when the themal beam density with lower velocity and the cold beam density with relativistic velocity increase. The real frequency of the instability is near the plasma frequency of the thermal beam electrons. Thus, a electrostatic emissions with frequencies larger than 1 GHz can be generated. These results show effects of the motion of solar flare particles in the corona. We may also apply this model to the generation mechanism for the solar Type- Ⅲ radio emission.
【Fund】: 国家自然科学青年基金资助项目(49804010)
【CateGory Index】: P182.52
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