Abstract
AbstractProton-boron (p11B) fusion is an attractive potential energy source but technically challenging to implement. Developing techniques to realize its potential requires first developing the experimental capability to produce p11B fusion in the magnetically-confined, thermonuclear plasma environment. Here we report clear experimental measurements supported by simulation of p11B fusion with high-energy neutral beams and boron powder injection in a high-temperature fusion plasma (the Large Helical Device) that have resulted in diagnostically significant levels of alpha particle emission. The injection of boron powder into the plasma edge results in boron accumulation in the core. Three 2 MW, 160 kV hydrogen neutral beam injectors create a large population of well-confined, high -energy protons to react with the boron plasma. The fusion products, MeV alpha particles, are measured with a custom designed particle detector which gives a fusion rate in very good relative agreement with calculations of the global rate. This is the first such realization of p11B fusion in a magnetically confined plasma.
Publisher
Springer Science and Business Media LLC
Subject
General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary
Reference28 articles.
1. Dawson, J. Fusion, (ed. Teller, E.) Part B, Vol. 1 (Academic Press, 1981).
2. Putvinski, S., Ryutov, D. & Yushmanov, P. Fusion reactivity of the pB11 plasma revisited. Nucl. Fusion 59, 076018 (2019).
3. Sikora, M. & Weller, H. A new evaluation of the 11B(p,α)αα reaction rates. J. Fusion Energy 35, 538 (2016).
4. Hay, M. J. & Fisch, N. J. Ignition threshold for non-maxwellian plasmas. Phys. Plasmas 22, 112116 (2015).
5. Tajima, T. & Binderbauer, M. W. (eds.) Proceedings of Norman Rostoker Memorial Symposium, Vol. 1721 (AIP, 2016).
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