Advanced scheme for high-yield laser driven proton-boron fusion reaction

D. Margarone; A. Picciotto; A. Velyhan; J. Krasa; M. Kucharik; M. Morrissey; A. Mangione; A. Szydlowsky; A. Malinowska; G. Bertuccio; Y. Shi; M. Crivellari; J. Ullschmied; P. Bellutti; G. Korn

doi:10.1117/12.2084598

26 February 2015 Advanced scheme for high-yield laser driven proton-boron fusion reaction

D. Margarone, A. Picciotto, A. Velyhan, J. Krasa, M. Kucharik, M. Morrissey, A. Mangione, A. Szydlowsky, A. Malinowska, G. Bertuccio, Y. Shi, M. Crivellari, J. Ullschmied, P. Bellutti, G. Korn

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Proceedings Volume 9345, High Power Lasers for Fusion Research III; 93450F (2015) https://doi.org/10.1117/12.2084598
Event: SPIE LASE, 2015, San Francisco, California, United States

Abstract

A low contrast nanosecond laser pulse with relatively low intensity (3 × 10¹⁶ W cm^–2) was used to enhance the yield of induced nuclear reactions in advanced solid targets. In particular the "ultraclean" proton-boron fusion reaction, producing energetic alpha-particles without neutron generation, was chosen. A spatially well-defined layer of boron dopants in a hydrogen-enriched silicon substrate was used as target. The combination of the specific target geometry and the laser pulse temporal shape allowed enhancing the yield of alpha-particles up to 10⁹ per steradian, i.e 100 times higher than previous experimental achievements. Moreover the alpha particle stream presented a clearly peaked angular and energy distribution, which make this secondary source attractive for potential applications. This result can be ascribed to the interaction of the long laser pre-pulse with the target and to the optimal target geometry and composition.

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D. Margarone, A. Picciotto, A. Velyhan, J. Krasa, M. Kucharik, M. Morrissey, A. Mangione, A. Szydlowsky, A. Malinowska, G. Bertuccio, Y. Shi, M. Crivellari, J. Ullschmied, P. Bellutti, and G. Korn "Advanced scheme for high-yield laser driven proton-boron fusion reaction", Proc. SPIE 9345, High Power Lasers for Fusion Research III, 93450F (26 February 2015); https://doi.org/10.1117/12.2084598

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