同名作者【Wenchao Yan】论文列表 -- 中国光学期刊网

同名作者【Wenchao Yan】论文列表

期刊

选择下列全部论文 将选定结果：

Gamma-ray Vortex Burst in Nonlinear Thomson Scattering with Refocusing Spiral Plasma Mirror

Weijun Zhou ^1,2Wenchao Yan ^1,2,*Jinguang Wang ³Liming Chen ^1,2,*

Author Affiliations

Abstract

¹ Key Laboratory for Laser Plasmas, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.

² Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China.

³ Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

The gamma-ray vortex burst in the nonlinear Thomson scattering when the laser wakefield accelerated electron bunch collides with an ultra-intense Laguerre–Gaussian laser that was reflected from the refocusing spiral plasma mirror. The orbit angular momentum of the scattering laser would be transferred to the gamma radiation through the scattering process. The 3-dimensional particle-in-cell simulations gave the electron dynamics in the scattering, which determines the characteristics of the vortical radiation. The radiation calculation results illustrated the burst of gamma-ray vortex and surprisingly revealed the radiation pattern distortion phenomenon due to the nonlinear effect. This scheme can not only simplify the experimental setup for the generation of twisted radiation but also boost the yield of vortical gamma photons. The peak brightness of the gamma-ray vortex was estimated to be 1 × 10²² photons/s/mm²/mrad²/0.1% BW at 1 MeV, which might pave the way for the researches on angular momentum-related nuclear physics.

PDF全文 Full Text

Ultrafast Science

2023, 3(1): 0005

Research Articles

Micro-size picosecond-duration fast neutron source driven by a laser–plasma wakefield electron accelerator

Yaojun Li ^1,2Jie Feng ^1,2,*Wenzhao Wang ^1,2Junhao Tan ^1,2[ ... ]Liming Chen ^1,2

Author Affiliations

Abstract

¹ Key Laboratory of Laser Plasma (MoE), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China

² IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai, China

³ Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China

⁴ Key Laboratory of Nuclear Physics and Ion-beam Application (MoE), Institute of Modern Physics, Fudan University, Shanghai, China

A pulsed fast neutron source is critical for applications of fast neutron resonance radiography and fast neutron absorption spectroscopy. However, due to the large transversal source size (of the order of mm) and long pulse duration (of the order of ns) of traditional pulsed fast neutron sources, it is difficult to realize high-contrast neutron imaging with high spatial resolution and a fine absorption spectrum. Here, we experimentally present a micro-size ultra-short pulsed neutron source by a table-top laser–plasma wakefield electron accelerator driving a photofission reaction in a thin metal converter. A fast neutron source with source size of approximately 500 μm and duration of approximately 36 ps has been driven by a tens of MeV, collimated, micro-size electron beam via a hundred TW laser facility. This micro-size ultra-short pulsed neutron source has the potential to improve the energy resolution of a fast neutron absorption spectrum dozens of times to, for example, approximately 100 eV at 1.65 MeV, which could be of benefit for high-quality fast neutron imaging and deep understanding of the theoretical model of neutron physics.

fast neutrons high-power laser laser wakefield acceleration photofission reaction

PDF全文 Full Text

High Power Laser Science and Engineering

2022, 10(5): 05000e33

Review Article

Collimated gamma rays from laser wakefield accelerated electrons

Minghua Li ¹Liming Chen ^1,2,3,*Dazhang Li ⁴Kai Huang ^1,5[ ... ]Jie Zhang ^3,6

Author Affiliations

Abstract

¹ Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

² School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China

³ IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China

⁴ Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

⁵ Kansai Photon Science Institute (KPSI), National Institutes for Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215, Japan

⁶ Key Laboratory for Laser Plasmas (MOE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China

⁷ SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom

Betatron radiation from laser wakefield accelerated electrons and X-rays scattered off a counter-propagating relativistic electron bunch are collimated and hold the potential to extend the energy range to hard X-ray or gamma ray band. The peak brightness of these incoherent radiations could reach the level of the brightest synchrotron light sources in the world due to their femtosecond pulse duration and source size down to a few micrometers. In this article, the principle and properties of these radiation sources are briefly reviewed and compared. Then we present our recent progress in betatron radiation enhancement in the perspective of both photon energy and photon number. The enhancement is triggered by using a clustering gas target, arousing a second injection of a fiercely oscillating electron bunch with large charge or stimulating a resonantly enhanced oscillation of the ionization injected electrons. By adopting these methods, bright photon source with energy over 100 keV is generated which would greatly impact applications such as nuclear physics, diagnostic radiology, laboratory astrophysics and high-energy density science.

Laser wakefield accelerator Laser wakefield accelerator Gamma ray Gamma ray Hard X-ray Hard X-ray Betatron radiation Betatron radiation Enhancement Enhancement

PDF全文 Full Text

Matter and Radiation at Extremes

2018, 3(4): 188

关于本站 Cookie 的使用提示

全站搜索

热点聚焦

学术活动

关于本站 Cookie 的使用提示

全站搜索