| Original Articles |
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Simulation of Resonant Interaction between Energetic Electrons and Whistler-Mode Chorus in the Outer Radiation Belt |
| SU Zhen-Peng, ZHENG Hui-Nan |
| CAS Key Lab for Basic Plasma Science, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026 |
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| Cite this article: |
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SU Zhen-Peng, ZHENG Hui-Nan 2008 Chin. Phys. Lett. 25 4493-4496 |
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Abstract We construct a realistic model to evaluate the chorus wave--particle interaction in the outer radiation belt L=4.5. This model incorporates a plasmatrough number density model, a field-aligned density model and a realistic wave power and frequency model. We solve the 2D bounce-averaged momentum-pitch-angle Fokker--Planck equation and show that the Whistler-mode chorus can be effective in the acceleration of electrons, and enhance the phase space density for energies of ~1 MeV by a factor from 10 to 103 in about two days, consistent with the observation. We also demonstrate that ignorance of the electron number density variation along field line and magnetic local time in the previous work yields an overestimate of energetic electron phase space density by a factor 5~10 at large pitch-angle after two days, suggesting that a realistic plasma density model is very important to evaluate the evolution of energetic electrons in the outer radiation belt.
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| Keywords:
94.20.Wj
52.35.Hr
94.30.Lr
94.30.Hn
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Received: 21 September 2008
Published: 27 November 2008
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| PACS: |
94.20.wj
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(Wave/particle interactions)
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52.35.Hr
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(Electromagnetic waves (e.g., electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid))
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94.30.Lr
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(Magnetic storms, substorms)
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94.30.Hn
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(Energetic trapped particles)
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[1] Baker D N, Blake J B, Klebesadel R W and Higbie P R 1986 J. Geophys. Res. 91 4265
[2] Baker D N 2002 Science 297 1486
[3] Summers D, Thorne R M and Xiao F L 1998 J. Geophys.Res. 103 20487
[4] Li L, Cao J and Zhou G 2005 J. Geophys. Res. 110 A03203
[5] Xiao F L, Thorne R M and Summers D 2007 Planet. SpaceSci. 55 1257
[6] Xiao F L, Chen L X, Zhou Q H, He H Y and Wen Y J 2007 Chin. Phys. Lett. 24 294
[7] Xiao F L, Chen L X, He H Y and Zhou Q H 2008 Chin.Phys. Lett. 25 336
[8] Xiao F L, He H Y, Zhou Q H, Wu G H and Shi X H 2008 Plasma Sci. Tech. 10 27
[9] Elkington S R, Hudson M K and Chan A A 1999 Geophys. Res. Lett. 26 3273
[10] Zong Q-G, Zhou X-Z, Li X, Song P, Fu S Y, Baker D N,Pu Z Y, Fritz T A, Daly P, Balogh A and Re\'me H 2007 Geophys. Res. Lett. 34 L12105
[11] {Zheng H N, {Su Z P and {Xiong M 2008 Chin.Phys. Lett. 25 3515
[12] Summers D 2005 J. Geophys. Res. 110 A08213
[13] {Shprits Y Y, {Thorne R M, {Horne R B and {Summers D2006 J. Geophys. Res. 111 10225
[14] {Horne R B and {Thorne R M 2003 Geophys. Res.Lett. 30 1527
[15] {Meredith N P, {Horne R B, {Thorne R M and {AndersonR R, 2003 Geophys. Res. Lett. 30 1871
[16] Xiao F L, Zhao H and He H Y 2005 Chin. Phys. Lett. {22 2451
[17] Xiao F L and Thorne R M 2006 Planet. Space Sci. 54 405
[18] Xiao F L and He H Y 2006 Chin. Phys. Lett. 23 267
[19] Xiao F L and Feng X S 2006 Plasma Sci. Tech. 8 279
[20] {Glauert S A and {Horne R B 2005 J. Geophys. Res. 110 4206
[21] {Hamlin D A, {Karplus R, {Vik R C and {Watson K M1961 J. Geophys. Res. 66 1
[22] {Stix T H 1992 Waves in Plasmas (New York:Springer)
[23] {Li W, {Shprits Y Y and {Thorne R M 2007 J.Geophys. Res. 112 A10220
[24] {Sheeley B W, {Moldwin M B, {Rassoul H K and{Anderson R R 2001 J. Geophys. Res. 106 25631
[25] {Denton R E, {Goldstein J, {Menietti J D and {Young SL 2002 J. Geophys. Res. 107 1386
[26] {Albert J M and {Young S L 2005 Geophys. Res.Lett. 32 14110
[27] {Horne R B, {Thorne R M, {Glauert S A, {Albert J M,{Meredith N P and {Anderson R R 2005 J. Geophys. Res. 110 3225
[28] Xiao F L 2006 Plasma Phys. Control. Fusion 48 203
[29] Xiao F L, Zhou Q H, He H Y and Tang L J 2006 Plasma Phys. Control. Fusion 48 1437
[30] Xiao F L, Zhou Q H and He H Y 2007 Chin. Phys.Lett. 24 2006
[31] Xiao F L, Zhou Q H, Li C X and Cai A J 2008 Plasma Phys. Control. Fusion 50 062001
[32] Xiao F L, Chen L X and Li J F 2008 Plasma Phys.Control. Fusion 50 105002 |
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