{"paper":{"title":"Gyrokinetic theory of slab universal modes and the non-existence of the Gradient Drift Coupling (GDC) instability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"Barrett N. Rogers, Ben Zhu, Manaure Francisquez","submitted_at":"2018-04-03T18:00:16Z","abstract_excerpt":"A gyrokinetic linear stability analysis of a collisionless slab geometry in the local approximation is presented. We focus on $k_\\parallel=0$ universal (or entropy) modes driven by plasma gradients at small and large plasma $\\beta$. These are small scale non-MHD instabilities with growth rates that typically peak near $k_\\perp\\rho_i\\sim 1$ and vanish in the long wavelength $k_\\perp\\to 0$ limit. This work also discusses a mode known as the Gradient Drift Coupling (GDC) instability previously reported in the gyrokinetic literature, which has a finite growth rate $\\gamma= \\sqrt{\\beta/[2(1+\\beta)]"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.01105","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}