Contents
2022
Volume: 34 Issue 12
25 Article(s)

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Advanced Interdisciplinary Science
An automatic focusing algorithm based on U-Net for target location in multiple depth-of-field scene
Luyao Liang, Xiaoyun Zhao, and Jinquan Zhao
Evaluation function of automatic focusing system is the key to evaluate image quality. In multi-depth-of-field scenarios, when the target is located in the center of the image, the sensitivity of the traditional focusing evaluation curve is low; when the target deviates from the center, the focus evaluation function cu
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 129001 (2022)
High Power Laser Physics and Technology
Real time phase calculation of phase shifted structured light based on one-dimensional look-up table
Songlin Ying, Dan Hu, and Kai Liu
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 121003 (2022)
Influence mechanism of atmosphere on the damage threshold induced by ultraviolet laser in vacuum window
Xiangxu Chai, Guanzhong Wang, Xiaolin Tian, Liquan Wang, Ye Tian, Yukun Jing, Fa Zeng, Song Zhou, and Yuanbin Chen
Vacuum window (VW) damage is the bottleneck restricting the load capacity of high-power laser device, and the influence of vacuum environment is worthy of attention. Firstly, based on the fluororubber ring seal, the laser-induced damage threshold (LIDT) of fused silica VW irradiated by the 351 nm laser was measured. It
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 121004 (2022)
Effect of Al and Nd on microstructure and properties of nickel-based cladding layer on Cr12MoV steel surface
Zeda Wang, Houming Zhou, Yuxu Zhu, Fangjia He, Nanxin Xiang, and Yuhao Wang
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 121005 (2022)
High Power Laser Physics and Technology?Research Letter
Laser-diode-pumped fiber laser amplifier for 13 kW high-beam-quality output
Peng Wang, Xiaoming Xi, Hanwei Zhang, Baolai Yang, Chen Shi, Hu Xiao, Zilun Chen, Zhiyong Pan, Xiaolin Wang, Zefeng Wang, Pu Zhou, Xiaojun Xu, and Jinbao Chen
Fiber-coupled semiconductor laser (LD)-pumped fiber laser amplifiers have the advantages of small size, high power-to-mass ratio, and good stability. However, limited by the level of device fabrication and the stimulated Raman scattering effect and mode instability (MI) effect inside the fiber, it is difficult for LD-p
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 121001 (2022)
5 kW near single mode output of narrow linewidth laser with simple MOPA structure
Xin Tian, Binyu Rao, Meng Wang, Chongwei Wang, Xiaoming Xi, Weiyi Yuan, Zhixian Li, Hao Li, Zilun Chen, Zhiyong Pan, Xiaolin Wang, Pengfei Ma, Zefeng Wang, and Jinbao Chen
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 121002 (2022)
High Power Microwave Technology
Time-domain measurement of the transient electric field caused by pantograph-catenary off-line discharge based on D-dot Sensor
Zhiyu Li, Hao Li, Hefei Cao, Mengzhe Jin, and Man Hu
The electromagnetic radiation of pantograph-catenary offline discharge has the characteristics of transient and broadband. We can use the D-dot sensor to measure its transient electric field in time domain. However, the direct integral operation of the differential signal seriously distorts the original signal. To solv
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 123001 (2022)
Design method of reflective broadband predistorter for solid-state power amplifier
Guanghui Sun, Dewei Zhang, Hailin Deng, Dalong Lü, Dongfang Zhou, and Chenge Bian
A design method for broadband reflective linearizer with specific gain and phase compensation is proposed, and a predistortion linearizer for solid-state power amplifiers is designed by this method. Nonlinear compensation is produced using the Schottky diode. The MATLAB optimization tool is utilized to calculate the sh
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 123002 (2022)
Design of highly isolated common aperture microstrip antenna for L/S/C/X band
Xinyuan Huang, Kun Jiang, and Qinggong Guo
For the first time, a highly isolated common aperture low-profile microstrip antenna is designed and realized to work in four frequency bands—L/S/C/X, simultaneously. The overall structure is made by stacking microstrip antennas of four bands from bottom to top according to the order of frequency from low to high, usin
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 123004 (2022)
Inertial Confinement Fusion Physics and Technology
Source-coded radiography technique with high spatial-resolution for X-ray source driven by ps-laser
Tiankui Zhang, Lianqiang Shan, Minghai Yu, Feng Lu, Weimin Zhou, Chao Tian, Fang Tan, Yonghong Yan, Feng Zhang, Zongqiang Yuan, Qiuyue Xu, Weiwu Wang, Zhigang Deng, Jian Teng, Dongxiao Liu, Lei Yang, Wei Fan, Yue Yang, Kainan Zhou, Jingqin Su, Yuchi Wu, Yongkun Ding, and Yuqiu Gu
To measure the areal density distribution of cold fuel at the maximum compression time during the stagnation phase of implosion in inertial confinement fusion (ICF), we have established the ps-laser driven high-energy X-ray radiography using source-coded technique. This paper describes the design and employment of the
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 122001 (2022)
Analyzing implosion symmetry based on fringe shifts of wide-angle velocity interferometer system for any reflector
Yuji Wu, Qing Zhang, Feng Wang, and Yulong Li
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 122002 (2022)
Optimized simulation of D3He proton source for exploding pusher target
Qiuyue Xu, Jiaxin Zhou, Lianqiang Shan, Chao Tian, Zuhua Yang, Tiankui Zhang, Weiwu Wang, Jian Teng, Zhigang Deng, Zongqiang Yuan, Feng Zhang, Wei Qi, Dongxiao Liu, Quanping Fan, Lai Wei, Weimin Zhou, and Yuqiu Gu
To establish a monochromatic high-energy proton photography platform on high power laser device with hundreds of kilojoules, D3He gas-filled spherical SiO2 glass pellets, irradiated by an absorbed laser intensity of 1015 W/cm2 have been considered and the exploding pusher target simulation has been conducted with Helio
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 122003 (2022)
Geant4 simulations of measurement of energy spectra of reflected ions generated by nanosecond-laser-drive non-relativistic collisionless electrostatic shocks
Zongqiang Yuan, Zhigang Deng, Jian Teng, Weiwu Wang, Tiankui Zhang, Feng Zhang, Chao Tian, Qiuyue Xu, Lianqiang Shan, Weimin Zhou, and Yuqiu Gu
In indirect-drive inertial confinement fusion experiments with vacuum or low-gas-fill hohlraums, collisionless electrostatic shocks can be launched in the hohlraum wall/alblator (or the low-density fill-gas) interpenetration region, which reflect ions at twice the shock velocity. A low-energy Thomson ion spectrometer w
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 122005 (2022)
Nuclear Science and Engineering
Influence of different types of nuclear fuel on burnup performance of heat pipe cooled reactor
Kaiwen Qin, Bo Yang, Ziming Wang, Yunchen Qian, Haojie Liu, and Yibao Liu
The heat pipe cooled reactor adopts the solid-state reactor design concept, and it has the characteristics of high power density, compact structure and high inherent safety. It has been extensively used for deep space exploration, deep sea exploration, remote areas electricity markets and other scenarios. Nuclear fuel
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 126001 (2022)
Dependence of tungsten melting and resolidification on pulse parameters under transient heat flow
Miao Qu, and Sha Yan
To study the influence of different pulse parameters on the melting and resolidification behavior of tungsten after its temperature reaches the melting point under transient heat flow, the differences in morphology and structure of tungsten after melting and resolidification under IPEB (5 ms) and CPF (0.1 ms) were expe
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 126002 (2022)
Particle Beams and Accelerator Technology
Design and beam dynamic analysis of 270° achromatic deflection magnet system
Jia Li, Quantang Zhao, Zhaohui Ran, Yuanming Long, Yang Zong, Yulun Li, Shuchun Cao, Xiaokang Shen, Zimin Zhang, and Ping Yuan
The 270° beam deflection system with magnets is widely used in medical electron linear accelerators and high-energy electron industrial irradiation accelerators. In this paper, three common structures of 270° deflection magnet are systematically analyzed and discussed. Numerical calculation and simulation met
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 124002 (2022)
Research on measurement method of altitude difference using hydrostatic leveling system
Xiao Li, Xiaoye He, Wei Wang, Zhubing Cheng, Ting Gao, and Tao Luo
As the precise sensor system for monitoring the relative difference in height among multiple points, the hydrostatic leveling system (HLS) is widely used in particle accelerators. At present, the HLS system is mainly used for the measurement of relative altitude changes. To expand the application of HLS system in accel
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 124003 (2022)
Simulation of long-range transport of non-ideal hydrogen atom beams in vacuum environment
Junjie Shi, Jianhong Hao, Fang Zhang, Qiang Zhao, Jieqing Fan, Shuo Shen, and Zhiwei Dong
Neutral beam has potential applications in space debris cleanup and space exploration. As that neutral beam prepared by ion source is not ideal in practice, this paper simulates the long-range transmission effect of non-ideal hydrogen beam in vacuum environment. According to the degree of neutralization, non-ideal beam
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 124004 (2022)
Particle Beams and Accelerator Technology?Research Letter
Pulsed Power Technology
Effect of different nitrogen ion implantation parameters on surface charge accumulation and dissipation characteristics of polytetrafluoroethene
Youhui He, Hongbin Chen, Fei Li, and Falun Song
To suppress the surface charge accumulation and improve the surface pressure resistance of polytetrafluoroethene (PTFE), the plasma immersion ion implantation was carried out on the surface of PTFE by radio frequency (RF) generation nitrogen plasma. The modification effect of PTFE sample surface was realized by changin
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 125001 (2022)
Pulsed power supply for three-dimensional magnetic reconnection experiment of earth’s magnetotail
Xun Ma, Jian Guan, Songjie Li, Juan Zhao, Jinshui Xiao, Weijun Deng, Mingjun Ding, Chuanhui Kang, Weiming Tong, Hongtao Li, and Peng E
A new large research infrastructure for fundamental researches on the space environment, Space Environment Simulation Research Infrastructure (SESRI), is being constructed. When studying the three-dimensional magnetic reconnection of the earth’s magnetotail, the dipole coil and two magnetic mirror coils in vacuum envir
High Power Laser and Particle Beams
  • Publication Date: Dec. 15, 2022
  • Vol. 34, Issue 12, 125003 (2022)