title: Achieving a long-lived high-beta plasma state by energetic beam injection.
abstract: Developing a stable plasma state with high-beta (ratio of plasma to magnetic pressures) is of critical importance for an economic magnetic fusion reactor. At the forefront of this endeavour is the field-reversed configuration. Here we demonstrate the kinetic stabilizing effect of fast ions on a disruptive magneto-hydrodynamic instability, known as a tilt mode, which poses a central obstacle to further field-reversed configuration development, by energetic beam injection. This technique, combined with the synergistic effect of active plasma boundary control, enables a fully stable ultra-high-beta (approaching 100%) plasma with a long lifetime.
authors.affiliation: Tri Alpha Energy, California 92688, USA.
authors.forename: H Y
authors.initials: HY
authors.lastname: Guo
authors.affiliation: Tri Alpha Energy, California 92688, USA.
authors.forename: M W
authors.initials: MW
authors.lastname: Binderbauer
authors.affiliation: Tri Alpha Energy, California 92688, USA.
authors.forename: T
authors.initials: T
authors.lastname: Tajima
authors.affiliation: 1] Tri Alpha Energy, California 92688, USA [2] PSI-Center, University of Washington, Seattle, Washington 98195, USA.
authors.forename: R D
authors.initials: RD
authors.lastname: Milroy
authors.affiliation: Tri Alpha Energy, California 92688, USA.
authors.forename: L C
authors.initials: LC
authors.lastname: Steinhauer
authors.affiliation: Tri Alpha Energy, California 92688, USA.
authors.forename: X
authors.initials: X
authors.lastname: Yang
authors.affiliation: Tri Alpha Energy, California 92688, USA.
authors.forename: E G
authors.initials: EG
authors.lastname: Garate
authors.affiliation: Tri Alpha Energy, California 92688, USA.
authors.forename: H
authors.initials: H
authors.lastname: Gota
authors.affiliation: Tri Alpha Energy, California 92688, USA.
authors.forename: S
authors.initials: S
authors.lastname: Korepanov
authors.affiliation: Tri Alpha Energy, California 92688, USA.
authors.forename: A
authors.initials: A
authors.lastname: Necas
authors.affiliation: Tri Alpha Energy, California 92688, USA.
authors.forename: T
authors.initials: T
authors.lastname: Roche
authors.affiliation: Tri Alpha Energy, California 92688, USA.
authors.forename: A
authors.initials: A
authors.lastname: Smirnov
authors.affiliation: Tri Alpha Energy, California 92688, USA.
authors.forename: E
authors.initials: E
authors.lastname: Trask