Optimized laser production of thermonuclear neutrons from plasma of submicron-sized clusters

The concept of maximizing the D-D fusion neutron yield from the laser-heated large volume of cluster medium by matching the focal spot size and cluster plasma structural scales to the laser pulse intensity was confirmed. For this purpose, the three-dimensional particle-in-cell GEANT4 simulations hav...

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Veröffentlicht in:Physics of plasmas 2024-07, Vol.31 (7)
Hauptverfasser: Gozhev, D. A., Bochkarev, S. G., Lobok, M. G., Brantov, A. V., Bychenkov, V. Yu
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container_end_page
container_issue 7
container_start_page
container_title Physics of plasmas
container_volume 31
creator Gozhev, D. A.
Bochkarev, S. G.
Lobok, M. G.
Brantov, A. V.
Bychenkov, V. Yu
description The concept of maximizing the D-D fusion neutron yield from the laser-heated large volume of cluster medium by matching the focal spot size and cluster plasma structural scales to the laser pulse intensity was confirmed. For this purpose, the three-dimensional particle-in-cell GEANT4 simulations have been performed by zoning of the large interaction domain. While considering a small domain of the entire interaction volume, which is partitioned into successive zones along laser propagation direction, a special algorithm was proposed allowing to reconstruct the integral spectrum of deuterons and D-D neutron yield. We demonstrate that it makes possible to specify high-performance laser–cluster neutron source following this concept. For example, for the submicron heavy water droplets heated by femtosecond laser pulse of the intensity 3 × 10 19 W/cm2 a D-D neutron yield may reach 10 7 neutrons per 1 J of deposited laser energy if the intensity contrast ratio prevents premature cluster destruction. Such yield is considerably higher than achieved to date for microstructured targets.
doi_str_mv 10.1063/5.0206751
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source Alma/SFX Local Collection
subjects Algorithms
Clusters
Deuterons
Femtosecond pulsed lasers
Femtosecond pulses
Heavy water
Laser beam heating
Lasers
Neutrons
Water drops
title Optimized laser production of thermonuclear neutrons from plasma of submicron-sized clusters
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