论文标题
来自高温D-D融合反应的激光驱动中子源
Laser-driven neutron source from high temperature D-D fusion reactions
论文作者
论文摘要
我们报告了一个激光驱动的中子源，其产量高（$> 10^8 $/j）和高峰通量（$> 10^{25} $/cm $ $^2 $/s）来自高温Deuteron-Deuteron Fusion Reactions。我们实验中的中子产率和融合温度（$ \ sim 200 $ keV）分别比以前的激光诱导的D-D融合反应高两个数量级和一个数量级。高温等离子体是由薄（$ \ sim 2 \，μ$ m），固体密度氘靶的产生的，由低温喷射产生，由140 FS，130 J Petawatt Laser辐射，带有f/3 Off-axpawats Parabola和Plasma镜像，并具有频率的快速热量热量。此处实现的融合温度和中子通量表明，未来的激光实验可以利用中子来诊断血浆条件，并更接近实验室研究与天体物理相关的核物理学的研究。
We report a laser-driven neutron source with high yield ($>10^8$/J) and high peak flux ($>10^{25}$/cm$^2$/s) derived from high-temperature deuteron-deuteron fusion reactions. The neutron yield and the fusion temperature ($\sim 200$ keV) in our experiment are respectively two orders of magnitude and one order of magnitude higher than any previous laser-induced D-D fusion reaction. The high-temperature plasma is generated from thin ($\sim 2\,μ$m), solid-density deuterium targets, produced by a cryogenic jet, irradiated by a 140 fs, 130 J petawatt laser with an F/3 off-axis parabola and a plasma mirror achieving fast volumetric heating of the target. The fusion temperature and neutron fluxes achieved here suggest future laser experiments can take advantage of neutrons to diagnose the plasma conditions and come closer to laboratory study of astrophysically-relevant nuclear physics.
