Variance of DD-neutron yield in laser fusion experiments

0545266 - FZÚ 2022 RIV FR eng C - Konferenční příspěvek (zahraniční konf.)
Krása, Josef - Klír, D. - Cikhardt, J. - Řezáč, K. - Pfeifer, Miroslav - Burian, Tomáš - Dudžák, Roman - Dostál, Jan - Krupka, Michal - Singh, Sushil K. - Juha, Libor - Krůs, M. - Chodukowski, T. - Borodziuk, S. - Rusiniak, Z. - Pisarczyk, T.
Variance of DD-neutron yield in laser fusion experiments.
EPS 2021: 47th European Physical Society Conference on Plasma Physics. Vol. 45A. Mulhouse: European Physical Society, 2021, č. článku P2.2001. ISBN 979-10-96389-13-1.
[47th EPS Conference on Plasma Physics. Virtual Conference (ES), 21.06.2021-25.06.2021]
Grant CEP: GA ČR GA19-02545S; GA MŠMT(CZ) LM2018114
Institucionální podpora: RVO:68378271
Klíčová slova: laser system PALS * deuterated plastic target irradiation * analysis o variance for neutron yield values
Obor OECD: Fluids and plasma physics (including surface physics)
http://ocs.ciemat.es/eps2021pap/pdf/P2.2001.pdf

This contribution deals with experimental observations of the yield of DD fusion in deuterated plastic targets irradiated by 300-ps 3-TW laser system PALS. To perform the analysis of variance for neutron yield values, Yn, in the range of 105 - 109 observed in a relatively narrow range of laser energy E from 500 - 700 J, the observed yield values were included in a neutron-yield – laser-energy (Yn−E) diagram showing general trends in the energy yield scaling Yn (E). This dependence is characterized by a power law, Yn = Q E1.65, where Q is the parameter reflecting possible dependence on the pulse duration, laser intensity, laser contrast ratio, focal geometry, target structure, etc. The analysis we present shows that, despite shot-to-shot fluctuations, the variance of Q values from 14-5.2x104 for the narrow range of laser energy obtained in PALS experiments can be elucidated by the influence of some nonlinear processes affecting ion acceleration.

Trvalý link: http://hdl.handle.net/11104/0321999