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Title: WHISTLER TURBULENCE FORWARD CASCADE VERSUS INVERSE CASCADE: THREE-DIMENSIONAL PARTICLE-IN-CELL SIMULATIONS

We present the results of the first fully three-dimensional particle-in-cell simulations of decaying whistler turbulence in a magnetized, homogeneous, collisionless plasma in which both forward cascades to shorter wavelengths, and inverse cascades to longer wavelengths are allowed to proceed. For the electron beta β {sub e} = 0.10 initial value considered here, the early-time rate of inverse cascade is very much smaller than the rate of forward cascade, so that at late times the fluctuation energy in the regime of the inverse cascade is much weaker than that in the forward cascade regime. Similarly, the wavevector anisotropy in the inverse cascade regime is much weaker than that in the forward cascade regime.
Authors:
 [1] ;  [2] ;  [3]
  1. Oracle Corporation, Redwood Shores, CA (United States)
  2. Space Science Institute, Boulder, CO (United States)
  3. University of Southern California, Los Angeles, CA (United States)
Publication Date:
OSTI Identifier:
22364167
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 800; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANISOTROPY; COLLISIONLESS PLASMA; COMPUTERIZED SIMULATION; FLUCTUATIONS; SOLAR ELECTRONS; SOLAR WIND; THREE-DIMENSIONAL CALCULATIONS; TURBULENCE; WAVELENGTHS; WHISTLER INSTABILITY; WHISTLERS