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 · 11 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, Journal Name: Nuclear Fusion Journal Issue: 4 Vol. 60; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

References (21)

An Acoustically Driven Magnetized Target Fusion Reactor Laberge, Michel Journal of Fusion Energy, Vol. 27, Issue 1-2 https://doi.org/10.1007/s10894-007-9091-4	journal	July 2007
Magnetized Target Fusion with a Spherical Tokamak Laberge, Michel Journal of Fusion Energy, Vol. 38, Issue 1 https://doi.org/10.1007/s10894-018-0180-3	journal	August 2018
Hydromagnetic stability of a diffuse linear pinch Newcomb, William A. Annals of Physics, Vol. 10, Issue 2 https://doi.org/10.1016/0003-4916(60)90023-3	journal	June 1960
Existence of Electromagnetic-Hydrodynamic Waves AlfvÉN, H. Nature, Vol. 150, Issue 3805 https://doi.org/10.1038/150405d0	journal	October 1942
Linear and nonlinear thresholds of neoclassical tearing modes in tokamaks Lütjens, Hinrich; Luciani, Jean-François Physics of Plasmas, Vol. 9, Issue 12 https://doi.org/10.1063/1.1521717	journal	December 2002
Adiabatic Compression of Tokamak Discharges Furth, H. P. Physics of Fluids, Vol. 13, Issue 10 https://doi.org/10.1063/1.1692832	journal	January 1970
Tearing mode in the cylindrical tokamak Furth, H. P. Physics of Fluids, Vol. 16, Issue 7 https://doi.org/10.1063/1.1694467	journal	January 1973
Tearing mode stability in a low-beta plasma with sawteeth Brennan, D. P.; Sugiyama, L. E. Physics of Plasmas, Vol. 13, Issue 5 https://doi.org/10.1063/1.2202133	journal	May 2006
Resistive stability of 2∕1 modes near 1∕1 resonance Brennan, D. P.; Turnbull, A. D.; Chu, M. S. Physics of Plasmas, Vol. 14, Issue 5 https://doi.org/10.1063/1.2515224	journal	May 2007
An improved neoclassical drift-magnetohydrodynamical fluid model of helical magnetic island equilibria in tokamak plasmas Fitzpatrick, Richard Physics of Plasmas, Vol. 23, Issue 5 https://doi.org/10.1063/1.4948559	journal	May 2016
The direct criterion of Newcomb for the ideal MHD stability of an axisymmetric toroidal plasma Glasser, A. H. Physics of Plasmas, Vol. 23, Issue 7 https://doi.org/10.1063/1.4958328	journal	July 2016
Computation of resistive instabilities by matched asymptotic expansions Glasser, A. H.; Wang, Z. R.; Park, J. -K. Physics of Plasmas, Vol. 23, Issue 11 https://doi.org/10.1063/1.4967862	journal	November 2016
A model of energetic ion effects on pressure driven tearing modes in tokamaks Halfmoon, M. R.; Brennan, D. P. Physics of Plasmas, Vol. 24, Issue 6 https://doi.org/10.1063/1.4984772	journal	June 2017
Resistive instabilities in general toroidal plasma configurations Glasser, A. H.; Greene, J. M.; Johnson, J. L. Physics of Fluids, Vol. 18, Issue 7 https://doi.org/10.1063/1.861224	journal	January 1975
Dynamics of seed magnetic island formation due to geometrically coupled perturbations Hegna, C. C.; Callen, J. D.; LaHaye, R. J. Physics of Plasmas, Vol. 6, Issue 1 https://doi.org/10.1063/1.873265	journal	January 1999
Ten years of results from the TOSCA device Robinson, D. C. Nuclear Fusion, Vol. 25, Issue 9 https://doi.org/10.1088/0029-5515/25/9/020	journal	September 1985
Initial studies of confinement, adiabatic compression, and neutral-beam heating in TFTR Grove, D. J.; Meade, D. M. Nuclear Fusion, Vol. 25, Issue 9 https://doi.org/10.1088/0029-5515/25/9/029	journal	September 1985
Modelling and analytic studies of sheared flow effects on tearing modes Chandra, D.; Thyagaraja, A.; Sen, A. Nuclear Fusion, Vol. 55, Issue 5 https://doi.org/10.1088/0029-5515/55/5/053016	journal	April 2015
Resistive instabilities in a diffuse linear pinch Coppi, Bruno; Greene, John M.; Johnson, John L. Nuclear Fusion, Vol. 6, Issue 2 https://doi.org/10.1088/0029-5515/6/2/003	journal	June 1966
Adiabatic Compression of the Tokamak Discharge Bol, K.; Ellis, R. A.; Eubank, H. Physical Review Letters, Vol. 29, Issue 22 https://doi.org/10.1103/PhysRevLett.29.1495	journal	November 1972
Physics of magnetically confined plasmas Boozer, Allen H. Reviews of Modern Physics, Vol. 76, Issue 4 https://doi.org/10.1103/RevModPhys.76.1071	journal	January 2005

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