Test Particle Acceleration in Three-dimensional Magnetohydrodynamic Turbulence | Zendy

P. Dmitruk | Zendy; W. H. Matthaeus | Zendy; N. Seenu | Zendy; M. R. Brown | Zendy

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Test Particle Acceleration in Three-dimensional Magnetohydrodynamic Turbulence

Author(s) -

P. Dmitruk,

W. H. Matthaeus,

N. Seenu,

M. R. Brown

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/379751

Subject(s) - physics , magnetohydrodynamic drive , particle acceleration , magnetohydrodynamics , magnetohydrodynamic turbulence , turbulence , acceleration , magnetic field , test particle , electric field , computational physics , compressibility , classical mechanics , shock (circulatory) , mechanics , scaling , quantum mechanics , medicine , geometry , mathematics

We perform numerical experiments of test particle acceleration on turbulent magnetic and electric fields obtained from pseudospectral direct numerical solutions of the compressible three-dimensional MHD equations. We find consistent acceleration of the particles to many times the plasma characteristic (Alfven) speed and extended power laws in the density distribution of energies. Scaling laws of maximum and mean energy of particles with the nominal gyrofrequency and the MHD electric field are observed and a simple estimate is presented.

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