Does the orbit-averaged theory require a scale separation between periodic orbit size and perturbation correlation length?
Using the canonical perturbation theory, we show that the orbit-averaged theory only requires a time-scale separation between equilibrium and perturbed motions and verifies the widely accepted notion that orbit averaging effects greatly reduce the microturbulent transport of energetic particles in a tokamak. Therefore, a recent claim [Hauff and Jenko, Phys. Rev. Lett. 102, 075004 (2009); Jenko et al., ibid. 107, 239502 (2011)] stating that the orbit-averaged theory requires a scale separation between equilibrium orbit size and perturbation correlation length is erroneous.
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
- (United States)
- Department of Physics and Astronomy, University of California, Irvine, California 92697 (United States)
- Publication Date:
- OSTI Identifier:
- Resource Type:
- Journal Article
- Resource Relation:
- Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 10; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
- Country of Publication:
- United States
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CHARGED-PARTICLE TRANSPORT; CORRELATIONS; LENGTH; ORBITS; PERIODICITY; PERTURBATION THEORY; PLASMA; PLASMA CONFINEMENT; TOKAMAK DEVICES; TURBULENCE