2025-05-05 テキサス大学オースティン校 (UT Austin)
Predicted motions of hundreds of particles in a fusion reactor. The motions predicted with the new method (orange, red) agree very closely with those predicted by Newton’s laws (blue, green), but can be calculated 10 times faster. Image credit: University of Texas at Austin.
＜関連情報＞
- https://news.utexas.edu/2025/05/05/university-of-texas-led-team-solves-a-big-problem-for-fusion-energy/
- https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.134.175101
超音速パンクヒール可能で衝撃に強い共有結合適応ネットワーク Nonperturbative Guiding Center Model for Magnetized Plasmas
J. W. Burby,I. A. Maldonado,M. Ruth,D. A. Messenger,L. Carbajal
Physical Review Letters Published: 30 April, 2025
DOI: https://doi.org/10.1103/PhysRevLett.134.175101
Abstract
Perturbative guiding center theory adequately describes the slow drift motion of charged particles in the strongly magnetized regime characteristic of thermal particle populations in various magnetic fusion devices. However, it breaks down for particles with large-enough energy. We report on a data-driven method for learning a nonperturbative guiding center model from full-orbit particle simulation data. We show the data-driven model significantly outperforms traditional asymptotic theory in magnetization regimes appropriate for fusion-born particles in stellarators, thus opening the door to nonperturbative guiding center calculations.
