Particle orbits in a force-balanced, wave-driven, rotating torus

Ochs, I. E.; Fisch, N. J.

doi:10.1063/1.4991510

Title: Particle orbits in a force-balanced, wave-driven, rotating torus

Journal Article · Fri Sep 01 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4991510· OSTI ID:1430519

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Princeton Univ., NJ (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

A wave-driven rotating torus is a recently proposed fusion concept where the rotational transform is provided by the E × B drift resulting from a minor radial electric field. This field can be produced, for instance, by the RF-wave-mediated extraction of fusion-born alpha particles. In this paper, we discuss how macroscopic force balance, i.e., balance of the thermal hoop force, can be achieved in such a device. We show that this requires the inclusion of a small plasma current and vertical magnetic field and identify the desirable reactor regime through free energy considerations. We then analyze particle orbits in this desirable regime, identifying velocity-space anisotropies in trapped (banana) orbits, resulting from the cancellation of rotational transforms due to the radial electric and poloidal magnetic fields. The potential neoclassical effects of these orbits on the perpendicular conductivity, current drive, and transport are discussed.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-97ER25308; SC0016072

OSTI ID:: 1430519

Alternate ID(s):: OSTI ID: 1389120

Journal Information:: Physics of Plasmas, Vol. 24, Issue 9; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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References (17)

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Cited By (5)

Strategies for advantageous differential transport of ions in magnetic fusion devices Kolmes, E. J.; Ochs, I. E.; Fisch, N. J. Physics of Plasmas, Vol. 25, Issue 3 https://doi.org/10.1063/1.5023931	journal	March 2018
H-mode access and the role of spectral shift with electrode biasing in the TCABR tokamak Grenfell, G. G.; Nascimento, I. C.; Oliveira, D. S. Physics of Plasmas, Vol. 25, Issue 7 https://doi.org/10.1063/1.5029561	journal	July 2018
E × B configurations for high-throughput plasma mass separation: An outlook on possibilities and challenges Gueroult, Renaud; Zweben, Stewart J.; Fisch, Nathaniel J. Physics of Plasmas, Vol. 26, Issue 4 https://doi.org/10.1063/1.5083229	journal	April 2019
A necessary condition for perpendicular electric field control in magnetized plasmas Gueroult, Renaud; Rax, Jean-Marcel; Fisch, Nathaniel J. Physics of Plasmas, Vol. 26, Issue 12 https://doi.org/10.1063/1.5126083	journal	December 2019
Strategies for Advantageous Differential Transport of Ions in Magnetic Fusion Devices Kolmes, E. J.; Ochs, I. E.; Fisch, N. J. arXiv https://doi.org/10.48550/arxiv.1801.06591	text	January 2018

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