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• W4313889963 abstract "A compact high-flux, short-pulse neutron source would have applications from nuclear astrophysics to cancer therapy. Laser-driven neutron sources can achieve fluxes much higher than spallation and reactor neutron sources by reducing the volume and time in which the neutron-producing reactions occur by orders of magnitude. We report progress towards an efficient laser-driven neutron source in experiments with a cryogenic deuterium jet on the Texas Petawatt laser. Neutrons were produced both by laser-accelerated multi-MeV deuterons colliding with Be and mixed metallic catchers and by d ( d , n ) 3 He fusion reactions within the jet. We observed deuteron yields of 10 13 /shot in quasi-Maxwellian distributions carrying <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=m1><mml:mo>∼</mml:mo><mml:mn>8</mml:mn><mml:mo>−</mml:mo><mml:mn>10</mml:mn><mml:mi>%</mml:mi></mml:math> of the input laser energy. We obtained neutron yields greater than 10 10 /shot and found indications of a deuteron-deuteron fusion neutron source with high peak flux ( <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML id=m2><mml:mo>></mml:mo><mml:mn>1</mml:mn><mml:msup><mml:mrow><mml:mn>0</mml:mn></mml:mrow><mml:mrow><mml:mn>22</mml:mn></mml:mrow></mml:msup></mml:math> cm −2 s −1 ). The estimated fusion neutron yield in our experiment is one order of magnitude higher than any previous laser-induced dd fusion reaction. Though many technical challenges will have to be overcome to convert this proof-of-principle experiment into a consistent ultra-high flux neutron source, the neutron fluxes achieved here suggest laser-driven neutron sources can support laboratory study of the rapid neutron-capture process, which is otherwise thought to occur only in astrophysical sites such as core-collapse supernova, and binary neutron star mergers." @default.
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• W4313889963 date "2023-01-09" @default.
• W4313889963 modified "2023-09-30" @default.
• W4313889963 title "High deuteron and neutron yields from the interaction of a petawatt laser with a cryogenic deuterium jet" @default.
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• W4313889963 doi "https://doi.org/10.3389/fphy.2022.964696" @default.
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