Explanipedia

Laboratory evidence of Weibel magnetogenesis driven by temperature gradient using three-dimensional synchronous proton radiography Open

Zhonghai Zhao, Shukai He, Honghai An, Zhu Lei, Y. Xie , et al. · 2024

The origin of the cosmic magnetic field remains an unsolved mystery, relying not only on specific dynamo processes but also on the seed field to be amplified. Recently, the diffuse radio emission and Faraday rotation observations reveal th…

Diagnosis of indirectly driven double shell targets with point-projection hard x-ray radiography Open

Chao Tian, Minghai Yu, Lianqiang Shan, Fengjuan Wu, Bi Bi , et al. · 2024

We present an application of short-pulse laser-generated hard x rays for the diagnosis of indirectly driven double shell targets. Cone-inserted double shell targets were imploded through an indirect drive approach on the upgraded SG-II las…

The effects of incident light wavelength difference on the collective stimulated Brillouin scattering in plasmas Open

Qiang Wang, Zhichao Li, Z. J. Liu, Tao Gong, Wen-shuai Zhang , et al. · 2023

The first laser–plasma interaction experiment using lasers of eight beams grouped into one octad has been conducted on the Shenguang Octopus facility. Although each beam intensity is below its individual threshold for stimulated Brillouin …

Solutions of several theory and technique problems in high-space-resolving hotspot electron temperature diagnosis techniques in inertial confinement fusion Open

Kuan Ren, Yao Li, Shenye Liu, Rongqing Yi, Baozhong Mu , et al. · 2022

In implosion experiments, bremsstrahlung radiation ratios of broad-energy-band x-ray emission intensities (sampled by Ross pair) and narrow-energy-band x-ray emission intensities (sampled by multilayer) are typically used to extract the ho…

Three-dimensional synchronous proton radiography for dynamic magnetic fields in laser-produced high-energy-density plasmas Open

Zhonghai Zhao, Shukai He, Honghai An, Zhu Lei, Y. Xie , et al. · 2021

Understanding the generation and evolution of magnetic fields in high-energy-density plasmas is a major scientific challenge in broad research areas including astrophysics, cosmology, and laser fusion energy. However, the fully three-dimen…

Commissioning experiment of the high-contrast SILEX-Ⅱ multi-petawatt laser facility Open

Wei Hong, Shukai He, Jian Teng, Zhigang Deng, Zhimeng Zhang , et al. · 2021

The results of a commissioning experiment on the SILEX-Ⅱ laser facility (formerly known as CAEP-PW) are reported. SILEX-Ⅱ is a complete optical parametric chirped-pulse amplification laser facility. The peak power reached about 1 PW in a 3…

Optimization of x-ray emissions with Gd + Au + Gd sandwich design Open

Liling Li, Shaoen Jiang, Hang Li, Jianhua Zheng, Longfei Jing , et al. · 2021

The x-ray emissivity of gadolinium (Gd) and gold (Au) has been studied using the FLYCHK code. The results show that the Gd M-band is lower than 2 keV and that Gd has a higher x-ray emissivity at low temperature. Thus, we proposed a Gd + Au…

Recent diagnostic developments at the 100 kJ-level laser facility in China Open

Feng Wang, Shaoen Jiang, Yongkun Ding, Shenye Liu, Jiamin Yang , et al. · 2020

A 100 kJ-level laser facility has been designed to study inertial confinement fusion physics in China. This facility incorporates various diagnostic techniques, including optical, x-ray imaging, x-ray spectrum, and fusion product diagnosti…

Strong Modification of Radiative Transition Rates due to a Breit-Interaction-Induced Avoided Crossing Open

Zhimin Hu, Gang Xiong, Xiang Gao, Nobuyuki Nakamura, Ke Yao , et al. · 2019

We present the observations of x-rays emitted from the $1s2s^{2}2p_{1/2}2p_{3/2}$ inner shell excited state of B-like W and Bi ions. The relative transition rates are obtained for two dominant radiative transitions to $1s^{2}2s^{2}2p_{1/2}…

Recent research progress of laser plasma interactions in Shenguang laser facilities Open

Tao Gong, Liang Hao, Zhichao Li, Dong Yang, Sanwei Li , et al. · 2019

We report experimental research on laser plasma interaction (LPI) conducted in Shenguang laser facilities during the past ten years. The research generally consists of three phases: (1) developing platforms for LPI research in mm-scale pla…

Progress in optical Thomson scattering diagnostics for ICF gas-filled hohlraums Open

H. Zhao, Zhichao Li, Dong Yang, Xin Li, Yao‐Hua Chen , et al. · 2019

Optical Thomson scattering (OTS) diagnostics have been continuously developed on a series of large laser facilities for inertial confinement fusion (ICF) research in China. We review recent progress in the use of OTS diagnostics to study t…

First Investigation on the Radiation Field of the Gas-Filled Three-Axis Cylindrical Hohlraum Open

Hang Li, Longfei Jing, Shaoen Jiang, Longyu Kuang, Huabin Du , et al. · 2018

A novel ignition hohlraum named three-axis cylindrical hohlraum (TACH) is designed for indirect-drive inertial confinement fusion. TACH is a kind of 6 laser entrance holes (LEHs) hohlraum, which is orthogonally jointed of three cylindrical…

First Integrated Implosion Experiment of Three-Axis Cylindrical Hohlraum at the SGIII Laser Facility Open

Longyu Kuang, Hang Li, Shaoen Jiang, Longfei Jing, Jianhua Zheng , et al. · 2018

The first integrated implosion experiment of three-axis cylindrical hohlraum (TACH) was accomplished at the SGIII laser facility. 24 laser beams of the SGIII laser facility were carefully chosen and quasi-symmetrically injected into the TA…

Implementation of ultraviolet Thomson scattering on SG-III laser facility Open

H. Zhao, Zhichao Li, Dong Yang, Xiaohua Jiang, Yonggang Liu , et al. · 2018

An ultraviolet Thomson-scattering system has been designed and implemented on the Shenguang-III laser facility, a 48-beam, 3ω (351 nm), 180 kJ-level laser driver for high energy density physics and inertial confinement fusion researches. T…

Laser plasma instability in indirect-drive inertial confinement fusion Open

Dong Yang, Zhichao Li, Sanwei Li, Liang Hao, Xin Li , et al. · 2018

In indirect-drive inertial confinement fusion (ICF), the incident laser beam could excite laser plasma instabilities (LPI) such as stimulated Brillouin scattering (SBS), stimulated Raman scattering (SRS) and two plasmon decay (TPD) besides…

Recent progress of hohlraum physics experiments in indirect-driven ICF in China Open

Sanwei Li, Dong Yang, Xin Li, Zhichao Li, Liang Guo , et al. · 2018

In recent years, hohlraum experiments have been performed extensively on Shenguang series laser facilities in the context of laser indirect-drive inertial confinement fusion. Multiple aspects about the hohlraumenergetics, drive symmetry an…

Progress and plans of X-ray temporal and spatial diagnosis technology of Shenguang facilities Open

Zhurong Cao, Zheng Yuan, Tao Chen, Bo Deng, Qiangqiang Wang , et al. · 2018

出的新概念诊断设备的技术性能甚至优于国外同类型诊断设备

Backscatter spectra measurements of the two beams on the same cone on Shenguang-III laser facility Open

Weiyi Zha, Dong Yang, Tao Xu, Yonggang Liu, Feng Wang , et al. · 2018

In laser driven hohlraums, laser beams on the same incident cone may have different beam and plasma conditions, causing beam-to-beam backscatter difference and subsequent azimuthal variations in the x-ray drive on the capsule. To elucidate…

Focusing effect of channel target on ultra-intense laser-accelerated proton beam Open

Yang Si-qian, Zhou Weimin, Siming Wang, Jiao Jinlong, Zhimeng Zhang , et al. · 2017

In laser proton acceleration, the inevitable transverse divergence of proton beam restricts its applications in many fields. In this paper, a structured target with a properly wide channel attached to the backside of a foil is proposed, an…

Proton radiography of magnetic fields generated with an open-ended coil driven by high power laser pulses Open

Guoqian Liao, Yutong Li, Baojun Zhu, Yan-Fei Li, Fang Li , et al. · 2016

Recently generation of strong magnetic (B) fields has been demonstrated in capacitor coils heated by high power laser pulses [S. Fujioka et al., Sci. Rep. 3, 1170 (2013)]. This paper will present a direct measurement of B field generated w…

Experimental demonstration of laser to x-ray conversion enhancements with low density gold targets Open

Wanli Shang, Jiamin Yang, Wenhai Zhang, Zhichao Li, Bo Deng , et al. · 2016

The enhancement of laser to x-ray conversion efficiencies using low density gold targets [W. L. Shang, J. M. Yang, and Y. S. Dong, Appl. Phys. Lett. 102, 094105 (2013)] is demonstrated. Laser to x-ray conversion efficiencies with 6.3% and …

Quasi suppression of higher-order diffractions with inclined rectangular apertures gratings Open

Yuwei Liu, Xiaoli Zhu, Yulin Gao, Wenhai Zhang, Quanping Fan , et al. · 2015

High direct drive illumination uniformity achieved by multi-parameter optimization approach: a case study of Shenguang III laser facility Open

Chao Tian, Jia Chen, Bo Zhang, Lianqiang Shan, Weimin Zhou , et al. · 2015

The uniformity of the compression driver is of fundamental importance for inertial confinement fusion (ICF). In this paper, the illumination uniformity on a spherical capsule during the initial imprinting phase directly driven by laser bea…

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