Detection of bifurcation in phase-space perturbative structures across transient wave-particle interaction in laboratory plasmas
成果类型：
Article
署名作者：
Kobayashi, T.; Yoshinuma, M.; Hu, W.; Ida, K.
署名单位：
National Institutes of Natural Sciences (NINS) - Japan; National Institute for Fusion Science (NIFS) - Japan; Graduate University for Advanced Studies - Japan; Kyushu University
刊物名称：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN/ISSBN：
0027-9715
DOI：
10.1073/pnas.2408112121
发表日期：
2024-11-12
关键词：
摘要：
A key ingredient for realizing a magnetically confined tritium-deuterium plasma fusion reactor is plasma heating by fusion-born high-energy helium ions, as a chained cycle of nuclear burning. Efficient collisionless plasma heating by high-energy particles is anticipated when their energy is directly transferred to the plasma through waves. Those processes often involve nonlinear structure formations in phase-space, spanned by real-space and velocity-space coordinates, that significantly influence heating efficiency. To date, experimental knowledge of phase-space structure formation physics is severely limited, due to lack of experimental diagnostic schemes. Here, state-of-theart hardware and software approaches for phase-space perturbative structure detection are introduced. A bifurcation in the phase-space structure formation is found, which affects the plasma heating efficiency. A confinement magnetic field structure is shown to be a potential knob for nuclear-burning control through phase-space manipulation.