Minimizing separatrix crossings through isoprominence

Burby, J. W.; Duignan, N.; Meiss, J. D.

doi:10.1088/1361-6587/acb968

Title: Minimizing separatrix crossings through isoprominence

Journal Article · 21 February 2023 · Plasma Physics and Controlled Fusion

DOI: https://doi.org/10.1088/1361-6587/acb968 · OSTI ID:1958236

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Abstract A simple property of magnetic fields that minimizes bouncing to passing type transitions of guiding center orbits is defined and discussed. This property, called isoprominence, is explored through the framework of a near-axis expansion. It is shown that isoprominent magnetic fields for a toroidal configuration exist to all orders in a formal expansion about a magnetic axis. Some key geometric features of these fields are described.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: Simons Foundation; USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1958236

Report Number(s):: LA-UR-22-30857

Journal Information:: Plasma Physics and Controlled Fusion, Journal Name: Plasma Physics and Controlled Fusion Journal Issue: 4 Vol. 65; ISSN 0741-3335

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Related Subjects

confinement
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
bouncing
type-transitions
guiding center
near-axis expansion
separatrix crossing

Title: Minimizing separatrix crossings through isoprominence

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