High-current stream of energetic α particles from laser-driven proton-boron fusion

0541112 - ÚFP 2022 RIV US eng J - Článek v odborném periodiku
Giuffrida, L. - Belloni, F. - Margarone, D. - Petringa, G. - Milluzzo, G. - Scuderi, V. - Velyhan, A. - Rosinski, M. - Picciotto, A. - Kuchařík, M. - Dostál, Jan - Dudžák, Roman - Krása, Josef - Catalano, R. - Tudisco, S. - Istokskaia, V. - Verona, C. - Jungwirth, K. - Bellutti, P. - Korn, G. - Cirrone, G. A. P.
High-current stream of energetic α particles from laser-driven proton-boron fusion.
Physical Review E. Roč. 101, č. 1 (2020), č. článku 013204. ISSN 2470-0045. E-ISSN 2470-0053
Grant CEP: GA MŠMT EF16_019/0000789; GA ČR(CZ) GA19-24619S; GA MŠMT EF16_013/0001552
Institucionální podpora: RVO:61389021
Klíčová slova: High-current * proton-boron * alpha particles
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 2.529, rok: 2020
Způsob publikování: Omezený přístup
https://pureadmin.qub.ac.uk/ws/files/201391993/PhysRevE.101.013204.pdf

The nuclear reaction known as proton-boron fusion has been triggered by a subnanosecond laser system focused onto a thick boron nitride target at modest laser intensity (∼1016W/cm2), resulting in a record yield of generated α particles. The estimated value of α particles emitted per laser pulse is around 1011, thus orders of magnitude higher than any other experimental result previously reported. The accelerated α-particle stream shows unique features in terms of kinetic energy (up to 10 MeV), pulse duration (∼10 ns), and peak current (∼2 A) at 1 m from the source, promising potential applications of such neutronless nuclear fusion reactions. We have used a beam-driven fusion scheme to explain the total number of α particles generated in the nuclear reaction. In this model, protons accelerated inside the plasma, moving forward into the bulk of the target, can interact with B11 atoms, thus efficiently triggering fusion reactions. An overview of literature results obtained with different laser parameters, experimental setups, and target compositions is reported and discussed.
Trvalý link: http://hdl.handle.net/11104/0321499