• Rapid Communication

Nonlinear instabilities driven by coherent phase-space structures

M. Lesur and P. H. Diamond
Phys. Rev. E 87, 031101(R) – Published 12 March 2013

Abstract

In the presence of wave dissipation, phase-space structures emerge in nonlinear Vlasov dynamics. Our theory gives a simple relation between the growth of these coherent structures and that of the wave energy. The structures can drive the wave by direct momentum exchange, which explains the existence of nonlinear instabilities in both barely unstable and linearly stable (subcritical) regimes. When dissipation is modeled by a linear term in the field equation, simple expressions of a single-hole growth rate and of the initial perturbation threshold are in agreement with numerical simulations.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 20 February 2012

DOI:https://doi.org/10.1103/PhysRevE.87.031101

©2013 American Physical Society

Authors & Affiliations

M. Lesur1,2 and P. H. Diamond1,3

  • 1WCI Center for Fusion Theory, NFRI, Gwahangno 113, Yusung-gu, Daejeon 305-333, Korea
  • 2Itoh Research Center for Plasma Turbulence, Kasuga, Kasuga Koen 6-1, 816-8580, Kyushu University, Japan
  • 3CMTFO and CASS, University of California, San Diego, La Jolla, California 92093, USA

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 87, Iss. 3 — March 2013

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review E

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×