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About this paper
Min-sheng Liu, Hua-sheng Xie, Yu-min Wang, Jia-qi Dong, Kai-ming Feng, Xiang Gu, Xian-li Huang, Xin-chen Jiang and 16 more
ENN Science and Technology Development Co., Ltd. presents a roadmap for achieving commercial fusion energy by focusing on proton-boron fusion within compact spherical torus devices. The work concludes that p-11B fusion is feasible under specific conditions, projecting a Q>10 scenario for a conceptual 4m, 6T ST reactor, and details a phased experimental program to validate the necessary physics and engineering.
Key insights
- Proton-boron (p-11B) fusion is deemed theoretically feasible for net energy gain (Q>1) given the achievement of a 'hot ion mode' (Ti/Te ">= 4) and high wall reflection rates (">=90%) to manage radiation losses.
- Spherical Torus (ST) configurations are predicted to be more suitable for p-11B fusion than conventional tokamaks (CTs), enabling significantly higher fusion gains (e.g., Q=30 for ST vs. Q=3.2 for CT in comparable scenarios) with lower magnetic fields and heating power.
- A 'fusion enhancement factor' (f_sigma > 2), if achievable through non-thermal ion distributions, could substantially reduce the required plasma parameters (temperature, density, confinement time) for p-11B fusion.
Summary by alphaXiv.
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