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Visualization of Fa...
Visualization of Fast Ion Phase-Space Flow Driven by Alfven Instabilities
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- Du, X. D. (author)
- General Atomics
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- Van Zeeland, M. A. (author)
- General Atomics
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- Heidbrink, W. W. (author)
- University of California at Irvine (UCI)
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- Gonzalez-Martin, J. (author)
- University of California at Irvine (UCI)
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- Särkimäki, Konsta, 1990 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Snicker, A. (author)
- Aalto-Yliopisto,Aalto University
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- Lin, D. (author)
- University of California at Irvine (UCI)
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- Collins, C. S. (author)
- General Atomics
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- Austin, M. E. (author)
- The University of Texas at Austin, USA
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- McKee, G. R. (author)
- University of Wisconsin Madison
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- Yan, Z. (author)
- University of Wisconsin Madison
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- Todo, Y. (author)
- National Institutes of Natural Sciences (NINS)
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- Wu, W. (author)
- General Atomics
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(creator_code:org_t)
- 2021
- 2021
- English.
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In: Physical Review Letters. - 1079-7114 .- 0031-9007. ; 127:23
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Abstract
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- Fast ion phase-space flow, driven by Alfven eigenmodes (AEs), is measured by an imaging neutral particle analyzer in the DIII-D tokamak. The flow firstly appears near the minimum safety factor at the injection energy of neutral beams, and then moves radially inward and outward by gaining and losing energy, respectively. The flow trajectories in phase space align well with the intersection lines of the constant magnetic moment surfaces and constant E - (omega / n)P-zeta surfaces, where E, P-zeta are the energy and canonical toroidal momentum of ions; omega and n are angular frequencies and toroidal mode numbers of AEs. It is found that the flow is so destructive that the thermalization of fast ions is no longer observed in regions of strong interaction. The measured phase-space flow is consistent with nonlinear hybrid kinetic-magnetohydrodynamics simulation. Calculations of the relatively narrow phase-space islands reveal that fast ions must transition between different flow trajectories to experience large-scale phase-space transport.
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
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- art (subject category)
- ref (subject category)
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- By the author/editor
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Du, X. D.
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Van Zeeland, M. ...
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Heidbrink, W. W.
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Gonzalez-Martin, ...
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Särkimäki, Konst ...
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Snicker, A.
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show more...
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Lin, D.
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Collins, C. S.
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Austin, M. E.
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McKee, G. R.
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Yan, Z.
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Todo, Y.
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Wu, W.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Other Physics To ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Mechanical Engin ...
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and Fluid Mechanics ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
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Physical Review ...
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Chalmers University of Technology