Laser-Driven Proton-Boron Fusions: Influences of the Boron State

The proton-boron (p 11 B) reaction is regarded as the holy grail of advanced fusion fuels, where the primary reaction produces 3 energetic α particles. However, due to the high nuclear bounding energy and bremsstrahlung energy losses, energy gain from the p 11 B fusion is hard to achieve in thermal...

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Bibliographic Details
Published in:Laser and particle beams 2022, Vol.2022, Article e8
Main Authors: Ning, Xiaochuan, Liang, Tianyi, Wu, Dong, Liu, Shujun, Liu, Yangchun, Hu, Tianxing, Sheng, Zhengmao, Ren, Jieru, Jiang, Bowen, Zhao, Yongtao, Hoffmann, Dieter H. H., He, X.T.
Format: Article
Language:English
Subjects:
Alpha particles
Alpha rays
Boron
Bremsstrahlung
Electric fields
Electromagnetism
Energy
Energy loss
Experiments
Flow velocity
Lasers
Magnetic fields
Nuclear fuels
Nuclear fusion
Plasma
Proton beams
Simulation
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Summary:The proton-boron (p 11 B) reaction is regarded as the holy grail of advanced fusion fuels, where the primary reaction produces 3 energetic α particles. However, due to the high nuclear bounding energy and bremsstrahlung energy losses, energy gain from the p 11 B fusion is hard to achieve in thermal fusion conditions. Owing to advances in intense laser technology, the p11 B fusion has drawn renewed attention by using an intense laser-accelerated proton beam to impact a boron-11 target. As one of the most influential works in this field, Labaune et al. first experimentally found that states of boron (solid or plasma) play an important role in the yield of α particles. This exciting experimental finding rouses an attempt to measure the nuclear fusion cross section in a plasma environment. However, up to now, there is still no quantitative explanation. Based on large-scale, fully kinetic computer simulations, the inner physical mechanism of yield increment is uncovered, and a quantitative explanation is given. Our results indicate the yield increment is attributed to the reduced energy loss of the protons under the synergetic influences of degeneracy effects and collective electromagnetic effects. Our work may serve as a reference for not only analyzing or improving further experiments of the p 11 B fusion but also investigating other beam-plasma systems, such as ion-driven inertial confinement fusions.
ISSN:0263-0346
1469-803X
DOI:10.1155/2022/9868807