Journal
PLASMA PHYSICS AND CONTROLLED FUSION
Volume 57, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0741-3335/57/1/014030
Keywords
laser plasma; nuclear reaction; laser fusion
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Funding
- Czech Ministry of Education, Youth and Sports through the COST project [LD14089]
- CHARPAC Work Package of the Laserlab-Europe III [284464]
- Ministry of Education, Youth and Sports of the Czech Republic [CZ. 1.05/1.1.00/02.0061, CZ. 1.07/2.3.00/20.0279, LM2010014]
- Academy of Sciences of the Czech Republic [M100101210]
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The use of a low contrast nanosecond laser pulse with a relatively low intensity (3 x 10(16) W cm(-2)) allowed the enhancing of 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 a target. A combination of the specific target composition and the laser pulse temporal shape allowed the enhancing of the yield of alpha particles up to 10(9) per steradian. 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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