English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

A quasilinear plasma transport theory that incorporates Fokker-Planckdynamical friction (drag) and pitch angle scattering is self-consistentlyderived from first principles for an isolated, marginally-unstable moderesonating with an energetic minority species. It is found that dragfundamentally changes the structure of the wave-particle resonance, breakingits symmetry and leading to the shifting and splitting of resonance lines. Incontrast, scattering broadens the resonance in a symmetric fashion. Comparisonwith fully nonlinear simulations shows that the proposed quasilinear systempreserves the exact instability saturation amplitude and the correspondingparticle redistribution of the fully nonlinear theory. Even in situations inwhich drag leads to a relatively small resonance shift, it still underpinsmajor changes in the redistribution of resonant particles. This novel influenceof drag is equally important in plasmas and gravitational systems. In fusionplasmas, the effects are especially pronounced for fast-ion-driveninstabilities in tokamaks with low aspect ratio or negative triangularity, asevidenced by past observations. The same theory directly maps to the resonantdynamics of the rotating galactic bar and massive bodies in its orbit,providing new techniques for analyzing galactic dynamics.

Shifting and splitting of resonance lines due to dynamical friction in plasmas