Statistical properties of the radiation belt seed population

被引：48

作者：

Boyd, A. J. ^{[1
,2
]}

Spence, H. E. ^{[1
]}

Huang, C. -L. ^{[1
]}

Reeves, G. D. ^{[2
,3
]}

Baker, D. N. ^{[4
]}

Turner, D. L. ^{[5
]}

Claudepierre, S. G. ^{[5
]}

Fennell, J. F. ^{[5
]}

Blake, J. B. ^{[5
]}

Shprits, Y. Y. ^{[6
,7
,8
,9
]}

机构：

[1] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA

[2] New Mexico Consortium, Los Alamos, NM USA

[3] Los Alamos Natl Lab, Space Sci & Applicat, Los Alamos, NM USA

[4] Univ Colorado, Atmospher & Space Phys Lab, Campus Box 392, Boulder, CO 80309 USA

[5] Aerosp Corp, Dept Space Sci, El Segundo, CA 90245 USA

[6] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA

[7] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA

[8] German Res Ctr Geosci GFZ, Helmholtz Ctr Potsdam, Potsdam, Germany

[9] Univ Potsdam, Potsdam, Germany

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2016年 / 121卷 / 08期

关键词：

WHISTLER-MODE CHORUS; RELATIVISTIC ELECTRONS; GEOMAGNETIC STORMS; LOCAL ACCELERATION; MAGNETOSPHERE; LOSSES; WAVES; ENHANCEMENT; PARTICLE;

D O I：

10.1002/2016JA022652

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a statistical analysis of phase space density data from the first 26 months of the Van Allen Probes mission. In particular, we investigate the relationship between the tens and hundreds of keV seed electrons and >1 MeV core radiation belt electron population. Using a cross-correlation analysis, we find that the seed and core populations are well correlated with a coefficient of approximate to 0.73 with a time lag of 10-15 h. We present evidence of a seed population threshold that is necessary for subsequent acceleration. The depth of penetration of the seed population determines the inner boundary of the acceleration process. However, we show that an enhanced seed population alone is not enough to produce acceleration in the higher energies, implying that the seed population of hundreds of keV electrons is only one of several conditions required for MeV electron radiation belt acceleration.

引用

页码：7636 / 7646

页数：11

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