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Dissipation of Magnetohydrodynamic Waves on Energetic Particles: Impact on Interstellar Turbulence and Cosmic Ray Transport.

DE2006876043

Publication Date	2006
Personal Author	Ptuskin, V. S.; Moskalenko, I. V.; Jones, F. C.; Strong, A. W.; Zirakashvili, V. N.
Page Count	38
Abstract	The physical processes involved in diffusion of Galactic cosmic rays in the interstellar medium are addressed. We study the possibility that the nonlinear MHD cascade sets the power-law spectrum of turbulence which scatters charged energetic particles. We find that the dissipation of waves due to the resonant interaction with cosmic ray particles may terminate the Kraichnan-type cascade below wavelengths 10(sup 13) cm. The effect of this wave dissipation has been incorporated in the GALPROP numerical propagation code in order to asses the impact on measurable astrophysical data. The energy-dependence of the cosmic-ray diffusion coefficient found in the resulting self-consistent model may explain the peaks in the secondary to primary nuclei ratios observed at about 1 GeV/nucleon.
Keywords	Cosmic rays Magnetohydrodynamics Turbulence Diffusion Intersellar space Cosmic radiation Plasma waves Nucleons Hydromagnetic waves Astrophysics Particles Energy dependence Wave propagation
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Stanford Linear Accelerator Center, CA.; Department of Energy, Washington, DC.; Akademiya Nauk SSSR, Troitsk (Russia). Inst. of Terrestrial Magnetism
Supplemental Notes	Prepared in cooperation with Akademiya Nauk SSSR, Troitsk (Russia). Inst. of Terrestrial Magnetism Ionosphereand Radio Wave Propagation. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200620

Dissipation of Magnetohydrodynamic Waves on Energetic Particles: Impact on Interstellar Turbulence and Cosmic Ray Transport.

Dissipation of Magnetohydrodynamic Waves on Energetic Particles: Impact on Interstellar Turbulence and Cosmic Ray Transport.
DE2006876043

Publication Date	2006
Personal Author	Ptuskin, V. S.; Moskalenko, I. V.; Jones, F. C.; Strong, A. W.; Zirakashvili, V. N.
Page Count	38
Abstract	The physical processes involved in diffusion of Galactic cosmic rays in the interstellar medium are addressed. We study the possibility that the nonlinear MHD cascade sets the power-law spectrum of turbulence which scatters charged energetic particles. We find that the dissipation of waves due to the resonant interaction with cosmic ray particles may terminate the Kraichnan-type cascade below wavelengths 10(sup 13) cm. The effect of this wave dissipation has been incorporated in the GALPROP numerical propagation code in order to asses the impact on measurable astrophysical data. The energy-dependence of the cosmic-ray diffusion coefficient found in the resulting self-consistent model may explain the peaks in the secondary to primary nuclei ratios observed at about 1 GeV/nucleon.
Keywords	Cosmic rays Magnetohydrodynamics Turbulence Diffusion Intersellar space Cosmic radiation Plasma waves Nucleons Hydromagnetic waves Astrophysics Particles Energy dependence Wave propagation
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Stanford Linear Accelerator Center, CA.; Department of Energy, Washington, DC.; Akademiya Nauk SSSR, Troitsk (Russia). Inst. of Terrestrial Magnetism
Supplemental Notes	Prepared in cooperation with Akademiya Nauk SSSR, Troitsk (Russia). Inst. of Terrestrial Magnetism Ionosphereand Radio Wave Propagation. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200620