Efficient Generation of Neutrons Based on Ultrashort Laser-driven Direct Acceleration in Microwire-Array Targets
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2026
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| author | Feng, Kaiyuan Zou, Debin Cui, Bo He, Shukai Dai, Yingzi Qi, Wei Luo, Jinlong Feng, Jie Li, Xinyan Chen, Zehao Hu, Lixiang Qin, Chengyu Zhang, Guobo Zhang, Hui Deng, Zhigang Yang, Xiaohu Shao, Fuqiu Ji, Liangliang Zhou, Weiming Yu, Tongpu |
| author_facet | Feng, Kaiyuan Zou, Debin Cui, Bo He, Shukai Dai, Yingzi Qi, Wei Luo, Jinlong Feng, Jie Li, Xinyan Chen, Zehao Hu, Lixiang Qin, Chengyu Zhang, Guobo Zhang, Hui Deng, Zhigang Yang, Xiaohu Shao, Fuqiu Ji, Liangliang Zhou, Weiming Yu, Tongpu |
| contents | We report on an experimental demonstration of efficient neutron generation based on direct laser acceleration in microwire-array targets irradiated by ultrashort (tens of femtoseconds) laser pulses. The optimal array period was identified, at which the maximum proton energy and the number of protons with energies exceeding $1~\mathrm{MeV}$ were significantly increased. Using a $1~\mathrm{PW}$, $\sim25~\mathrm{fs}$ laser at a moderate intensity of $\sim10^{20}~\mathrm{W/cm^2}$, a high neutron yield of up to $(8.33\pm0.84)\times10^{6}~\mathrm{n/sr/J}$ was detected from the LiD converter via $^7\mathrm{Li}(p,n)$ and $\mathrm{D}(p,n+p)$ nuclear reactions. Self-consistent integrated simulations reproduced the experimental results and predicted that with a Be converter, a forward pulsed neutron source with an unprecedented yield per joule of $3.67\times10^{7}~\mathrm{n/sr/J}$ can be obtained under identical laser conditions. This type of neutron source is favorable for applications that require a high repetition rate utilizing compact and economical laser systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_23913 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Efficient Generation of Neutrons Based on Ultrashort Laser-driven Direct Acceleration in Microwire-Array Targets Feng, Kaiyuan Zou, Debin Cui, Bo He, Shukai Dai, Yingzi Qi, Wei Luo, Jinlong Feng, Jie Li, Xinyan Chen, Zehao Hu, Lixiang Qin, Chengyu Zhang, Guobo Zhang, Hui Deng, Zhigang Yang, Xiaohu Shao, Fuqiu Ji, Liangliang Zhou, Weiming Yu, Tongpu Plasma Physics High Energy Physics - Experiment We report on an experimental demonstration of efficient neutron generation based on direct laser acceleration in microwire-array targets irradiated by ultrashort (tens of femtoseconds) laser pulses. The optimal array period was identified, at which the maximum proton energy and the number of protons with energies exceeding $1~\mathrm{MeV}$ were significantly increased. Using a $1~\mathrm{PW}$, $\sim25~\mathrm{fs}$ laser at a moderate intensity of $\sim10^{20}~\mathrm{W/cm^2}$, a high neutron yield of up to $(8.33\pm0.84)\times10^{6}~\mathrm{n/sr/J}$ was detected from the LiD converter via $^7\mathrm{Li}(p,n)$ and $\mathrm{D}(p,n+p)$ nuclear reactions. Self-consistent integrated simulations reproduced the experimental results and predicted that with a Be converter, a forward pulsed neutron source with an unprecedented yield per joule of $3.67\times10^{7}~\mathrm{n/sr/J}$ can be obtained under identical laser conditions. This type of neutron source is favorable for applications that require a high repetition rate utilizing compact and economical laser systems. |
| title | Efficient Generation of Neutrons Based on Ultrashort Laser-driven Direct Acceleration in Microwire-Array Targets |
| topic | Plasma Physics High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2604.23913 |