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Title: Differential formulation of the gyrokinetic Landau operator

Subsequent to the recent rigorous derivation of an energetically consistent gyrokinetic collision operator in the so-called Landau representation, this work investigates the possibility of finding a differential formulation of the gyrokinetic Landau collision operator. It is observed that, while a differential formulation is possible in the gyrokinetic phase space, reduction of the resulting system of partial differential equations to five dimensions via gyroaveraging poses a challenge. Finally, based on the present work, it is likely that the gyrocentre analogues of the Rosenbluth–MacDonald–Judd potential functions must be kept gyroangle dependent.
Authors:
ORCiD logo [1] ;  [2] ; ORCiD logo [1]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Saint Michael's College, Colchester, VT (United States). Dept. of Physics
Publication Date:
Report Number(s):
PPPL-5340
Journal ID: ISSN 0022-3778; PII: S0022377816001203
Grant/Contract Number:
AC02-09CH11466; SC0014032
Type:
Accepted Manuscript
Journal Name:
Journal of Plasma Physics
Additional Journal Information:
Journal Volume: 83; Journal Issue: 1; Journal ID: ISSN 0022-3778
Publisher:
Cambridge University Press
Research Org:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Saint Michael's College, Colchester, VT (United States)
Sponsoring Org:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; fusion plasma; plasma nonlinear phenomena; plasma simulation
OSTI Identifier:
1351535