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Accepted manuscript

Magnetohydrodynamic equilibrium and stability properties of the Infinity Two fusion pilot plant

Part of: Physics Basis of the Infinity Two Fusion Power Plant

Published online by Cambridge University Press:  24 March 2025

J.C. Schmitt Open the ORCID record for J.C. Schmitt [Opens in a new window] ,
D. T. Anderson Open the ORCID record for D. T. Anderson [Opens in a new window] ,
E. C. Andrew ,
A. Bader Open the ORCID record for A. Bader [Opens in a new window] ,
K. Camacho Mata Open the ORCID record for K. Camacho Mata [Opens in a new window] ,
J. M. Canik ,
L. Carbajal Open the ORCID record for L. Carbajal [Opens in a new window] ,
A. Cerfon Open the ORCID record for A. Cerfon [Opens in a new window] ,
W. A. Cooper  and
N. M. Davila Open the ORCID record for N. M. Davila [Opens in a new window]
...Show all authors
J.C. Schmitt*
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
D. T. Anderson
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
E. C. Andrew
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
A. Bader
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
K. Camacho Mata
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
J. M. Canik
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
L. Carbajal
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
A. Cerfon
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
W. A. Cooper
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA Swiss Alps Fusion Energy (SAFE), Vers l’Eglise, Switzerland
N. M. Davila
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
W. D. Dorland
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
J. M. Duff
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
W. Guttenfelder
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
C. C. Hegna
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
D. P. Huet
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
M. Landreman
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
G. Le Bars
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
A. Malkus
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
N. R. Mandell
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
B. Medasani
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
J. Morrissey
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
T. S. Pedersen
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
P. Sinha
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
L. Singh
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
Y. Suzuki
Affiliation:
Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, Japan
J. Varela
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
K. Willis
Affiliation:
Type One Energy Group, Knoxville, TN 37931, USA
*
†Email address for correspondence: [email protected]
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Abstract

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The magneto-hydrodynamic equilibrium and stability properties of the Infinity Two Fusion Pilot Plant baseline plasma physics design are presented. The configuration is a four field period, aspect ratio A = 10 quasi-isodynamic stellarator optimized for excellent confinement at elevated density and high magnetic field B = 9 T. Magnetic surfaces exist in the plasma core in vacuum and retain good equilibrium surface integrity from vacuum to an operational β = 1.6%, the ratio of the volume average of the plasma and magnetic pressures, corresponding to 800 MW Deuterium-Tritium fusion operation. Neoclassical calculations show that a selfconsistent bootstrap current on the order of ∼ 1 kA slightly increases the rotational transform profile by less than 0.001. The configuration has a magnetic well across its entire radius. From vacuum to the operating point, the configuration exhibits good ballooning stability characteristics, exhibits good Mercier stability across most of its minor radius, and it is stable against global low-n MHD instabilities up to β = 3.2%.

Type
Research Article
Information
Journal of Plasma Physics , Accepted manuscript , pp. 1 - 39
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2025. Published by Cambridge University Press