Stable compression of a spherical tokamak plasma

Brennan, Dylan; Froese, Aaron; Reynolds, Meritt; Barsky, Sandra; Wang, Zhirui; Delage, Michael; Laberge, Michel

doi:10.1088/1741-4326/ab74a2

Title: Stable compression of a spherical tokamak plasma

Journal Article · 12 March 2020 · Nuclear Fusion

DOI: https://doi.org/10.1088/1741-4326/ab74a2 · OSTI ID:1650654

^[1];

^[2]; Reynolds, Meritt ^[2]; Barsky, Sandra ^[2];

^[1]; Delage, Michael ^[2]; Laberge, Michel ^[2]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
General Fusion Inc., Burnaby, BC (Canada)

In this study, an analysis of toroidal plasma compression by a collapsing flux conserver reveals linearly stable scenarios of operation to high compression ratios. The resistive and ideal MHD stability is calculated in full toroidal geometry using the asymptotic matching method in realistic conditions. A time dependent MHD simulation of the compression is conducted to confirm the conservation principles used to calculate the equilibrium states for the analysis. The near edge current profile, controlled by toroidal field ramping during compression, is shown to be critical to stability due to coupling between poloidal components of the least stable mode. Two cases with slight differences in edge current are examined, one with a stable corridor to high compression and one without.

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

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1650654

Journal Information:: Nuclear Fusion, Vol. 60, Issue 4; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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References (21)

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