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Proceedings Paper

Advanced scheme for high-yield laser driven proton-boron fusion reaction
Author(s): 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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Paper 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.

Paper Details

Date Published: 26 February 2015
PDF: 8 pages
Proc. SPIE 9345, High Power Lasers for Fusion Research III, 93450F (26 February 2015); doi: 10.1117/12.2084598
Show Author Affiliations
D. Margarone, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
A. Picciotto, Fondazione Bruno Kessler (Italy)
A. Velyhan, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
J. Krasa, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
M. Kucharik, Czech Technical Univ. in Prague (Czech Republic)
M. Morrissey, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
A. Mangione, Institute of Advanced Technologies (Italy)
A. Szydlowsky, Institute of Plasma Physics and Laser Microfusion (Poland)
National Ctr. for Nuclear Research (Poland)
A. Malinowska, National Ctr. for Nuclear Research (Poland)
G. Bertuccio, Politecnico di Milano (Italy)
Y. Shi, Politecnico di Milano (Italy)
M. Crivellari, Fondazione Bruno Kessler (Italy)
J. Ullschmied, Institute of Plasma Physics of the ASCR, v.v.i. (Czech Republic)
P. Bellutti, Fondazione Bruno Kessler (Italy)
G. Korn, Institute of Physics of the ASCR, v.v.i. (Czech Republic)


Published in SPIE Proceedings Vol. 9345:
High Power Lasers for Fusion Research III
Abdul A. S. Awwal; Monya A. Lane, Editor(s)

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