A novel laser-collider used to produce monoenergetic 13.3 MeV 7Li (d, n) neutrons

Zhao, Jiarui; Zhang, X. P.; Yuan, Ding; Li, Y. T.; Li, D. Z.; Rhee, Yongjoo; Zhang, Zhijun; Li, F.; Zhu, Baojun; Li, Yan. F.; Han, Bo; Liu, Chunlei; Ma, Y.; Li, Yi F.; Tao, Mingrui; H., Li, M.; Guo, Xiaotong; Huang, Xiang; Fu, Sun; Zhu, Jianqiang; Zhao, Gang; Chen, L. M.; Fu, Changbo; Zhang, J.

doi:10.1038/srep27363

Cited by 11 publications

(6 citation statements)

References 30 publications

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“…Since the MFP is much larger than the width transition region (~450–700 μm), the shocks formed in the CF system are essentially collisionless. In addition, the observed features of the shocks are also different with the collisional case2627, where the structure is typically irregular and chaotic rather than well-organized.…”

Section: Experiments Resultsmentioning

confidence: 81%

Formation and evolution of a pair of collisionless shocks in counter-streaming flows

Yuan

Liu

et al. 2017

Sci Rep

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A pair of collisionless shocks that propagate in the opposite directions are firstly observed in the interactions of laser-produced counter-streaming flows. The flows are generated by irradiating a pair of opposing copper foils with eight laser beams at the Shenguang-II (SG-II) laser facility. The experimental results indicate that the excited shocks are collisionless and electrostatic, in good agreement with the theoretical model of electrostatic shock. The particle-in-cell (PIC) simulations verify that a strong electrostatic field growing from the interaction region contributes to the shocks formation. The evolution is driven by the thermal pressure gradient between the upstream and the downstream. Theoretical analysis indicates that the strength of the shocks is enhanced with the decreasing density ratio during both flows interpenetration. The positive feedback can offset the shock decay process. This is probable the main reason why the electrostatic shocks can keep stable for a longer time in our experiment.

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Section: Experiments Resultsmentioning

confidence: 81%

Formation and evolution of a pair of collisionless shocks in counter-streaming flows

Yuan

Liu

et al. 2017

Sci Rep

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“…The experiment was carried out at the ShenGuang-II Laser Facility of the National Laboratory on High-Power Lasers and Physics in Shanghai, China. Figure 1 shows a schematic diagram of the experimental setup [48][49][50].…”

Section: Methodsmentioning

confidence: 99%

Deuterium–deuterium fusion in nanowire plasma driven with a nanosecond high-energy laser

Xi,

Lv,

et al. 2023

Front. Phys.

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Investigating the enhancement of the interaction between laser and plasma is crucial for fundamental and applied physics research studies based on laser-induced acceleration and nuclear reactions. The improvement of energy conversion efficiency resulting in increasing reaction yields has been extensively studied by the interaction of femtosecond (fs) or picosecond (ps) lasers with nanowire targets. However, the effects of nanosecond (ns) lasers interacting with nanowire targets on energy absorption and production yield remain unknown. To address this issue, we conducted a deuterium–deuterium fusion experiment based on the collision of two plasmas induced by the interaction of the kilo-Joule-level nanosecond laser with nanowire targets. The experimental results of neutron detection indicate that the yields of nanowire targets remain at the same level as those of planar targets. We have used the counter-streaming collisionless plasma model to perform a numerical analysis of the output of nuclear reaction products at the center-of-mass energy (Ec.m.) values between 10 and 30 keV, and the calculation results are in good agreement with the experimental results. In addition, a magneto-hydrodynamic numerical simulation was also performed. It shows that the critical density of the target’s surface, which forms on the picosecond time scale, blocks the absorption of laser energy with nanosecond pulse length. Consequently, both our experimental and simulation results indicate that the enhancement factor is limited when a target with a spatial period less than µm is used in conjunction with a ns laser. Therefore, additional research is highly desirable to develop a target structure that can improve the efficiency of energy conversion between the laser and the target.

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“…When a PW-class intensity laser irradiates a solid target, the ions are accelerated to MeV energy by target normal sheath acceleration [10,11]. Then the energetic ion beams are dumped into secondary low-Z converter targets to emit directional neutron beams [12][13][14]. Moreover, the cluster target also creates a dense fusion environment under laser irradiation and produces neutrons by Coulomb explosion [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Compact neutron source from head-on collision of high energy density plasma jets

Cui

Ke²,

Yang³

et al. 2022

Front. Phys.

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We propose a new scheme to generate a neutron source with a short duration, and the scheme is validated in two-dimensional radiation hydrodynamic simulations. When a laser beam irradiates a deuterated polystyrene cone with a half-opening angle of 60°, high energy density plasma jets are produced due to the converging effect. As two laser-driven counter-propagating jets collide in a head-on configuration, the kinetic energy converts into internal energy efficiently, inducing a significant increase in density and temperature. Then, deuteron–deuteron thermonuclear reactions are triggered, and plenty of neutrons are released. The simulation results show that the total neutron yield is as high as 6.6×108 with a duration of 103 ps, providing a new way to achieve ultrafast diagnosis with high resolution in experiments.

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A novel laser-collider used to produce monoenergetic 13.3 MeV 7Li (d, n) neutrons

Cited by 11 publications

References 30 publications

Formation and evolution of a pair of collisionless shocks in counter-streaming flows

Formation and evolution of a pair of collisionless shocks in counter-streaming flows

Deuterium–deuterium fusion in nanowire plasma driven with a nanosecond high-energy laser

Compact neutron source from head-on collision of high energy density plasma jets

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