26-28 September 2013
Union South, UW-Madison
US/Central timezone

Cosmic ray acceleration in the presence of super diffusion

27 Sep 2013, 10:45
30m
Northwoods (Union South, UW-Madison)

Northwoods

Union South, UW-Madison

1308 West Dayton Street, Madison, WI 53706

Description

Alfvenic turbulence that determines the magnetic field wandering exhibit the process of superdiffusion which results in the perpendicular displacement to change as y~x^3/2, where x is the distance measured along magnetic field is the distance perpendicular to the magnetic field, provided that y is less than the injection scale of the turbulence. This process changes substantially the acceleration of cosmic rays in perpendicular shocks, which were considered as the accelerating agent of anomalous cosmic rays. I shall discuss how the process of superdiffusion changes the acceleration in parallel and perpendicular shocks and show the analogies between the shock and reconnection acceleration.

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