Enhancement of target normal sheath acceleration in laser multi-channel target interaction

Zou, D. B.; Yu, Dianlong; Jiang, Xinpeng; Yu, M. Y.; Chen, Zi-Yu; Deng, Zhigang; Yu, Tong-Pu; Yin, Yan; Shao, F. Q.; Zhuo, H. B.; Zhou, C. T.; Ruan, Shuangchen

doi:10.1063/1.5096902

Cited by 19 publications

(22 citation statements)

References 98 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the laser-to-ion energy conversion efficiency is still limited to 5 − 10%, and even lower for short fs intense laser pulses. To solve this problem, novel methods have been proposed to improve TNSA through using tailored targets [38][39][40][41][42][43][44][45][46][47][48][49][50][51].…”

Section: Introductionmentioning

confidence: 99%

Energetic deuterium-ion beams and neutron source driven by multiple-laser interaction with pitcher-catcher target

et al. 2020

Self Cite

View full text Add to dashboard Cite

Multiple lasers interacting with a deuterated (D) pitcher-catcher target and neutron generation are investigated using two-dimensional hybrid particle-in-cell and Monte Carlo simulations. It is found that when multiple laser pulses are focused on the front surface of the pitcher layer, D + ion acceleration by target normal sheath acceleration (TNSA) is enhanced by the interfering overlapped light fields and the resulting periodic target-surface structure. With three laser pulses each of 4.5 × 10 19 W cm −2 intensity, 33 fs duration and ~160 mJ energy, focusing at suitable angles on the pitcher layer, one can obtain 15 MeV D + ions and ~25% laser-to-D + ions energy conversion efficiency. As the resulting high-energy-density D + ions bombard the catcher layer, D-D fusion reactions are triggered. About 3.6 × 10 7 neutrons can be produced, with the maximum neutron production rate as high as 3.1 × 10 36 m −3 s −1 , almost an order of magnitude higher than that from a single laser of the same total energy.

show abstract

Section: Introductionmentioning

confidence: 99%

Energetic deuterium-ion beams and neutron source driven by multiple-laser interaction with pitcher-catcher target

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…There have been numerous investigations addressing the effect of target thickness 9,27 , nanostructuring of the target rear 28,29 , nanostructuring of the target front, e.g., nanoholes 30 , nanocone 30,31 , nanowires 32,33 , grating structure 31,34 , and nanospheres 31 , etc, on the front side of the target, on the characteristics of the accelerated protons/ions. The structured targets produce much higher ion energies compared to the flat targets even at moderate laser power, and it strongly depends on the shape of structures as well as the angle of incidence of the laser pulse.…”

Section: Introductionmentioning

confidence: 99%

Enhanced target normal sheath acceleration with a grooved hydrocarbon target

Khan¹,

Saxena²

2023

Preprint

View full text Add to dashboard Cite

The interaction of a high-intensity ultrashort laser pulse with a few microns-thick hydrocarbon target is known to accelerate protons/ions to multi-MeV, on the rear side of the target, via the mechanism of target normal sheath acceleration. Microstructuring the target front is one of the promising approaches to enhance the cut-off energy as well as to reduce the divergence of accelerated protons/ions. In this paper, the interaction of a normally incident intense laser pulse with targets having single micron-sized grooves, at their front side, of semi-circular, triangular, and rectangular shapes has been studied by using two-dimensional Particle-In-Cell (PIC) simulations. It is observed that as compared to a flat target for targets with a rectangular groove at the front side the focused hot electron beam at the rear side results in an approximately four-fold increase in the cut-off energy of accelerated protons. For triangular and semi-circular groove targets, the cut-off energy remains comparatively lower (higher than the flat target though). The angular divergence of the accelerated protons/ions is also found to be relatively much lower in the case of a rectangular groove.

show abstract

“…As more hot electrons are generated and collimated inside the gaps of the nanostructured targets, it has the potential advantages for the subsequent ion acceleration. For example, enhanced target normal sheath acceleration in nanostructured targets has been reported to greatly enhance the quality of the ion beam in both simulations [33][34][35] and experiments [36,37]. At the same time, with the development of surface microtechnology, many novel targets with nanostructures are realized in experiments, such as subwavelength gratings [38], metal nanobrushes [39,40], and silicon and oxide nanowires [41,42].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Proton Acceleration by Laser-Driven Collisionless Shock in the Near-Critical Density Target Embedding with Solid Nanolayers

et al. 2021

View full text Add to dashboard Cite

Effects of solid nanolayers embedded in a near-critical density plasma on the laser-driven collisionless shock acceleration are investigated by using two-dimensional particle-in-cell simulations. Due to the interaction of nanolayers and the incident laser, an additional number of hot electrons are generated and an inhomogeneous magnetic field is induced. As a result, the collisionless shock is reinforced within the nanolayer gaps compared to the target without the structured nanolayers. When the laser intensity is 9.8 × 10 19 W / cm 2 , the amplitude of the electrostatic field is increased by 30% and the shock velocity is increased from 0.079c to 0.091c, leading to an enhancement of the peak energy and the cutoff energy of accelerated protons, from 6.9 MeV to 9.1 MeV and 12.2 MeV to 20.0 MeV, respectively. Furthermore, the effects of the width of the nanolayer gaps are studied, by adjusting the gap width of nanolayers, and optimal nanolayer setups for collisionless shock acceleration can be acquired.

show abstract

Enhancement of target normal sheath acceleration in laser multi-channel target interaction

Cited by 19 publications

References 98 publications

Energetic deuterium-ion beams and neutron source driven by multiple-laser interaction with pitcher-catcher target

Energetic deuterium-ion beams and neutron source driven by multiple-laser interaction with pitcher-catcher target

Enhanced target normal sheath acceleration with a grooved hydrocarbon target

Enhanced Proton Acceleration by Laser-Driven Collisionless Shock in the Near-Critical Density Target Embedding with Solid Nanolayers

Contact Info

Product

Resources

About