All-in-one probe for exploring self-organized two-fluid equilibria in toroidal plasmas

This paper presents the development of an all-in-one probe to simultaneously measure all components of the generalized Ohm's law in reversed-field pinch plasmas and tokamaks. The polyhedral configuration of the Mach probe is achieved through the specific arrangement, angle, and depth of the collimator channel apertures drilled into the surface of a hollow boron nitride cylinder encasing it. This probe includes a central Mach probe to assess the ion velocity field in three dimensions. Initial tests at the RELAX and Madison Symmetric Torus machines have confirmed the probe's effectiveness, revealing an octahedron form similar to a tetrahedron. The probe seems to function correctly and is expected to facilitate the empirical validation of two-fluid equilibria at the periphery of toroidal plasmas.

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Publication Details

Journal
Review of Scientific Instruments
Published
2024-08-01
DOI
https://doi.org/10.1063/5.0215750
Citations
2
Primary Topic
Magnetic confinement fusion research
Type
article
Field-Weighted Citation Impact
1.32

Funders

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article

All-in-one probe for exploring self-organized two-fluid equilibria in toroidal plasmas

K. J. McCollam, Haruhiko HIMURA, Jens von der Linden, N. C. Hurst et al.
2 citations
Review of Scientific Instruments
Magnetic confinement fusion research
1.32
article

All-in-one probe for exploring self-organized two-fluid equilibria in toroidal plasmas

K. J. McCollam, Haruhiko HIMURA, Jens von der Linden, N. C. Hurst, A. F. Almagri, Akio Sanpei, H. Fujiwara, J. S. Sarff, C. B. Forest, Shinichiro INAGAKI, Takeru INOUE, Y. Ashida
article en
2 citations

Abstract

This paper presents the development of an all-in-one probe to simultaneously measure all components of the generalized Ohm's law in reversed-field pinch plasmas and tokamaks. The polyhedral configuration of the Mach probe is achieved through the specific arrangement, angle, and depth of the collimator channel apertures drilled into the surface of a hollow boron nitride cylinder encasing it. This probe includes a central Mach probe to assess the ion velocity field in three dimensions. Initial tests at the RELAX and Madison Symmetric Torus machines have confirmed the probe's effectiveness, revealing an octahedron form similar to a tetrahedron. The probe seems to function correctly and is expected to facilitate the empirical validation of two-fluid equilibria at the periphery of toroidal plasmas.

Review of Scientific InstrumentsVol. 95(8)
University of Wisconsin–Madison (US), Kyoto Institute of Technology (JP), Max Planck Institute for Plasma Physics (DE)
U.S. Department of Energy, Office of Science, Japan Society for the Promotion of Science, Fusion Energy Sciences
Peace, Justice and strong institutions
Openalex Percentile: Top 11%
Magnetic confinement fusion research
1.32
DOIOpen Access PDFOpenAlex
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All-in-one probe for exploring self-organized two-fluid equilibria in toroidal plasmas — K. J. McCollam, Haruhiko HIMURA, et al. · Review of Scientific Instruments (2024) | TGRS Research Map | TGRS