Dissipation of Magnetohydrodynamic Waves on Energetic Particles: Impact on Interstellar Turbulence and Cosmic Ray Transport
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.
- Research Organization:
- Stanford Linear Accelerator Center (SLAC)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 876043
- Report Number(s):
- SLAC-PUB-11628; astro-ph/0510335
- Country of Publication:
- United States
- Language:
- English
Similar Records
DAMPING OF MAGNETOHYDRODYNAMIC TURBULENCE IN PARTIALLY IONIZED PLASMA: IMPLICATIONS FOR COSMIC RAY PROPAGATION
Intermittency, dissipation, and scaling in two-dimensional magnetohydrodynamic turbulence
Cosmic rays and the physics of interstellar turbulence
Journal Article
·
Mon Aug 01 00:00:00 EDT 2016
· Astrophysical Journal
·
OSTI ID:22679599
Intermittency, dissipation, and scaling in two-dimensional magnetohydrodynamic turbulence
Journal Article
·
Sun Jan 14 23:00:00 EST 2007
· Physics of Plasmas
·
OSTI ID:20960089
Cosmic rays and the physics of interstellar turbulence
Conference
·
Mon Oct 31 23:00:00 EST 1988
· AIP Conf. Proc.; (United States)
·
OSTI ID:6592422