Electron Acceleration in the Heart of the Van Allen Radiation Belts

被引：495

作者：

Reeves, G. D. ^{[1
]}

Spence, H. E. ^{[2
]}

Henderson, M. G. ^{[1
]}

Morley, S. K. ^{[1
]}

Friedel, R. H. W. ^{[1
]}

Funsten, H. O. ^{[1
]}

Baker, D. N. ^{[3
]}

Kanekal, S. G. ^{[4
]}

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

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

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

Thorne, R. M. ^{[6
]}

Turner, D. L. ^{[7
]}

Kletzing, C. A. ^{[8
]}

Kurth, W. S. ^{[8
]}

Larsen, B. A. ^{[1
]}

Niehof, J. T. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Space Sci & Applicat Grp, Los Alamos, NM 87545 USA

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

[3] Univ Colorado, Lab Atmospher & Space Res, Boulder, CO 80309 USA

[4] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[5] Aerosp Corp, El Segundo, CA 90245 USA

[6] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA 90095 USA

[7] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA

[8] Univ Iowa, Dept Phys, Iowa City, IA 52242 USA

来源：

SCIENCE | 2013年 / 341卷 / 6149期

关键词：

RELATIVISTIC ELECTRONS; ULF; ENERGIZATION; STORM; CHORUS; POWER;

D O I：

10.1126/science.1237743

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The Van Allen radiation belts contain ultrarelativistic electrons trapped in Earth's magnetic field. Since their discovery in 1958, a fundamental unanswered question has been how electrons can be accelerated to such high energies. Two classes of processes have been proposed: transport and acceleration of electrons from a source population located outside the radiation belts (radial acceleration) or acceleration of lower-energy electrons to relativistic energies in situ in the heart of the radiation belts (local acceleration). We report measurements from NASA's Van Allen Radiation Belt Storm Probes that clearly distinguish between the two types of acceleration. The observed radial profiles of phase space density are characteristic of local acceleration in the heart of the radiation belts and are inconsistent with a predominantly radial acceleration process.

引用

页码：991 / 994

页数：4

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