Achieving high flux amplification in a gun-driven, flux-core spheromak

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Hooper_2007_Nucl._Fusion_47_1064.pdf (949.15 KB)

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https://iopscience.iop.org/article/10.1088/0029-5515/47/8/042

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http://hdl.handle.net/11603/31465

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UMBC Mechanical Engineering Department

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Author/Creator ORCID

https://orcid.org/0000-0002-6830-3126

Date

2007-08-03

Type of Work

journal articles
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Citation of Original Publication

Hooper, E. B., D. N. Hill, H. S. McLean, C. A. Romero-Talamás, and R. D. Wood. “Achieving High Flux Amplification in a Gun-Driven, Flux-Core Spheromak.” Nuclear Fusion 47, no. 8 (August 2007): 1064. https://doi.org/10.1088/0029-5515/47/8/042.

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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract

A new means of operating flux-core spheromaks with possibly increased stability, confinement and pulse length is analysed by a resistive magnetohydrodynamic (MHD) model. High amplification of the bias poloidal flux, required to minimize ohmic losses, is achieved by reducing the bias rapidly in a plasma formed at a lower amplification. The plasma separatrix is predicted to expand and incorporate the removed bias flux maintaining the total poloidal flux within the spheromak's flux-conserving wall. MHD energy on open magnetic field lines is reduced, reducing magnetic fluctuation levels. A means of experimental verification is suggested that may point the way to fusion-relevant spheromaks.