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Neutron yield scaling law in laser-cluster fusion experiments

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Title
Neutron yield scaling law in laser-cluster fusion experiments
Author(s)
Junho Won; Jaehyun Song; Seongmin Lee; Chiwan Song; Woosuk Bang
Publication Date
2023-06
Journal
Nuclear Fusion, v.63, no.6
Publisher
Institute of Physics
Abstract
We present a scaling law ( Y ∼ E β ) of fusion neutron yields (Y) for laser pulse energy (E) in laser-cluster fusion experiments. We compare the available neutron yield data from previous deuterium cluster fusion experiments with those calculated using the cylindrical fusion plasma model. The calculated neutron yields are shown as functions of the incident laser pulse energy, average number density, and ion temperature. Although the deuterium-deuterium fusion reactivity is known to increase rapidly with ion temperature, the neutron yield shows a modest increase above ∼10 keV for a given laser pulse energy. We find the scaling exponent β approaching 1.0 as the ion temperature increases from 1 keV to 100 keV. We explain the observed temperature dependence of β by examining the temperature dependence of the beam-beam and beam-target fusion neutron yields separately. Our scaling law differs from previously reported scaling laws from individual experiments, but it shows an excellent agreement with the scaling law determined by the maximum neutron yields of individual experiments. © 2023 The Author(s). Published on behalf of IAEA by IOP Publishing Ltd.
URI
https://pr.ibs.re.kr/handle/8788114/13378
DOI
10.1088/1741-4326/accdea
ISSN
0029-5515
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > 1. Journal Papers (저널논문)
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