Proof-of-principle experiment for laser-driven cold neutron source.
Proof-of-principle experiment for laser-driven cold neutron source.
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DOI：
10.1038/s41598-020-77086-y
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发表时间：
2020-11-19
影响因子：
4.6
通讯作者：
Kodama R
中科院分区：
文献类型：
--
作者：
Mirfayzi SR;Yogo A;Lan Z;Ishimoto T;Iwamoto A;Nagata M;Nakai M;Arikawa Y;Abe Y;Golovin D;Honoki Y;Mori T;Okamoto K;Shokita S;Neely D;Fujioka S;Mima K;Nishimura H;Kar S;Kodama R
科学和技术的进步继续支持新的发现，使科学家能够利用新的工具和来源获得对物质结构和性质的新见解。值得注意的是，中子是提供这种能力的最有价值的来源。在大坂激光工程研究所，第一步是朝着开发桌面激光驱动的中子源，能够产生高亮度和时间分辨率的各种能量。采用保持在低温下的纯氢慢化剂，在慢化剂出口表面附近测量了/脉冲的冷中子通量。通过蒙特-卡罗技术，对能量从100 keV到meV的中子束流持续时间从几百ns到几十ns进行了评估。目前，随着大坂大学即将推出的J-EPoCH高重复率激光器，预计将以紧凑的光束线在减速器处提供数量级的冷中子通量。
The scientific and technical advances continue to support novel discoveries by allowing scientists to acquire new insights into the structure and properties of matter using new tools and sources. Notably, neutrons are among the most valuable sources in providing such a capability. At the Institute of Laser Engineering, Osaka, the first steps are taken towards the development of a table-top laser-driven neutron source, capable of producing a wide range of energies with high brightness and temporal resolution. By employing a pure hydrogen moderator, maintained at cryogenic temperature, a cold neutron () flux of /pulse was measured at the proximity of the moderator exit surface. The beam duration of hundreds of ns to tens of is evaluated for neutron energies ranging from 100s keV down to meV via Monte-Carlo techniques. Presently, with the upcoming J-EPoCH high repetition rate laser at Osaka University, a cold neutron flux in orders of is expected to be delivered at the moderator in a compact beamline.