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Particle drift, diffusion, and acceleration at shocksThe gradient and curvature drifts implicit in change of the ambient magnetic field at a hydromagnetic shock wave are incorporated into the diffusive theory of shock acceleration of charged particles. The conventional jump condition at the shock is modified by a term incorporating the large drift along the shock plane. This term vanished identically for one-dimensional systems, but must be included in general for shocks which are finite in transverse extent or which have transverse structure. It is found that the effect of the drift is such that the transverse drift rate is proportional to the acceleration rate, and for perpendicular shocks is exactly equal to the rate of change of energy in the V x B electric field observed in the shock frame. This establishes a connection with the 'shock drift' models which neglect diffusion.
Document ID
19820047376
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Jokipii, J. R.
(Arizona, University Tucson, AZ, United States)
Date Acquired
August 10, 2013
Publication Date
April 15, 1982
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Accession Number
82A30911
Funding Number(s)
CONTRACT_GRANT: NSG-7101
CONTRACT_GRANT: NSF ATM-79-22018
Distribution Limits
Public
Copyright
Other

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