2018 Vol. 30, No. 2

Recommend Articles
本期封面及目录
Cover and Contents, High Power Laser and Particle Beams, No 2, Vol 30, 2018
2018, 30.
Research Letter
Possibility of complete stabilization of magneto-Rayleigh-Taylor instabilities and potential for fusion
Duan Shuchao, Xie Weiping, Wang Ganghua
2018, 30: 020101. doi: 10.11884/HPLPB201830.170454
Abstract:
The idea of using a directional time-varying(rotating) driving magnetic field (the alternant theta-Z-pinch configuration) or the multi-nested theta-Z-pinch configuration to suppress magneto-Rayleigh-Taylor instabilities in a dynamic Z-pinch was propo...
Overview
Research progress on miniaturization of high power repetition frequency Marx type pulse power source
Song Falun, Li Fei, Gong Haitao, Gan Yanqing, Zhang Beizheng, Luo Guangyao, Wang Ganping, Jin Xiao
2018, 30: 020201. doi: 10.11884/HPLPB201830.170337
Abstract:
The circuit of a Marx generator is the simplest high voltage amplification circuit, the technical difficulties of Marx generator with high voltage, high current are fast rise time, low jitter, repetitive frequency and long time operating. In order to...
High Power Laser and Optic
Drive laser system for a photocathode at IHEP
Li Xiaoshen, Xu Jinqiang, Sun Darui
2018, 30: 021001. doi: 10.11884/HPLPB201830.170344
Abstract:
The Energy Recovery Linac (ERL) can produce continuous electron bunches with low emittance at high average current. The photocathode electron gun needs high repetition rate, high average power drive laser system. Adopting advanced fiber laser technol...
Impact of vapor pressure on ablation rate of laser-irradiated ablate target
Jiang Xuedong, Chen Jiran, Wang Yu, Wang Chao
2018, 30: 021002. doi: 10.11884/HPLPB201830.170271
Abstract:
The ablation phenomena induced by high energy laser irradiation of carbon/carbon composites and the effect of vapor pressure on the ablation rate are investigated.First, the heat conduction model of the target irradiated by high power laser is set up...
Estimation and measurement of optical turbulence over land and offshore
Xu Chunyan, Zhan Guowei, Qing Chun, Cai Jun, Wu Xiaoqing
2018, 30: 021003. doi: 10.11884/HPLPB201830.170296
Abstract:
The refractive index structure constant is estimated and compared with measured values from micro-thermometer by using the meteorological parameters of Chengdu and Maoming, such as temperature, humidity and wind speed on two altitudes. The estimated ...
ICF and Laser Plasma
Experiment study of structure parameters influence on annular flash lamp radiation efficiency
Yang Zefeng, Liu Guanyu, Li Xingwen, Jia Shenli, Liu Jianjun, Li Haibing, Sui Zhan
2018, 30: 022001. doi: 10.11884/HPLPB201830.170263
Abstract:
As an important component of the amplifier, the flash lamp pumping efficiency directly affects the amplifier efficiency. Compared with the traditional flash lamp, the new structure flash lamp with a vacuum bubble inside (annular flash lamp) is proved...
High Power Microwave
Influence of characteristic impedance selection of switching oscillator on output waveform
Jiang Hongqiu, Yang Lanjun, Guan Jinqing, Xu Haipeng, Zhang Zhiyuan
2018, 30: 023001. doi: 10.11884/HPLPB201830.170324
Abstract:
Switch oscillator is one of the important methods for broadband high power electromagnetic pulse generation. This paper uses the switch excitation coaxial oscillator as an example, the theoretical calculation and simulation as the main means to study...
Development progress of relativistic multi-beam
Wang Ganping, Jin Xiao, Li Chunxia, Huang Hua, Liu Zhenbang, Li Lele
2018, 30: 023002. doi: 10.11884/HPLPB201830.170279
Abstract:
This paper introduces the studies on the relativistic multi-beam electron gun with different structures. The theoretic analysis and experimental results show that the spot distortion is obvious with fan-shaped multi-beam cathode due to the nonuniform...
X-band high power broadband mode-selective directional coupler
Yu Jihang, Gong Yubin, Wang Zhanliang, Yu Chuan, Liao Yong
2018, 30: 023003. doi: 10.11884/HPLPB201830.170343
Abstract:
The overmoded circular waveguide can achieved high power capacity, which will inevitably lead to high order mode. In order to monitor the output power and frequency spectrum of the X-band long pulse high power microwave source, an X-band high power m...
Comparison of two discontinuous spectral element methods
Zhang Yang, Wang Xianghui, Zhang Jie, Wang Jianguo, Qi Hongxin
2018, 30: 023004. doi: 10.11884/HPLPB201830.170169
Abstract:
This paper is concerned with the comparison of two spectral Discontinuous Galerkin Time-Domain (DGTD) methods for the solution of Maxwell's equations in two-dimensional space. The first scheme is based on the conventional mass-lumping technique, wher...
Design of antenna array with 24 GHz wide beam
Zuo Quanhe, Geng Youlin
2018, 30: 023005. doi: 10.11884/HPLPB201830.170282
Abstract:
Based on Rogers 5880 dielectric material, a radar front-end circular polarization microstrip antenna array for the vehicle collision avoidance system is designed, which adopts linear array structure and many quarter wave impedance converters to achie...
Terahertz Technology
Development of high frequency pulsed power supply for THz device test
Cai Zhengping, Li Weisong
2018, 30: 023101. doi: 10.11884/HPLPB201830.170274
Abstract:
The THz device is a new type of microwave device which operates in the 0.1-10 THz frequency band, and it has important application value in the field of communication, imaging, detection and other military applications. Compared with the traditional ...
Particle Beams Technology
Simulation on the dynamics of hollow cathode discharge in helium
He Shoujie, Zhang Baoming, Wang Peng, Zhang Zhao, Han Yuhong
2018, 30: 024001. doi: 10.11884/HPLPB201830.170211
Abstract:
In this paper, the spatiotemporal dynamics of hollow cathode discharge in helium is simulated by using the fluid model. The spatiotemporal distribution of electrons density, metastable helium atoms density, potential, electric field, direct ionizatio...
Pulsed Power Technology
Electric field analysis and optimization of the insulation system in gas-filled spark gap switch of Dragon-Ⅱ accelerator
Wu Qingzhou, Li Jin, Li Yuan, Gao Feng, Huang Ziping, Chen Mao, Liu Bangliang
2018, 30: 025001. doi: 10.11884/HPLPB201830.170370
Abstract:
In linear induction accelerator, Z-pinch and other large pulsed power devices, the gas-filled spark gap switches as key components are widely used. Unreasonable insulation system may bring excessively high partial electric field and accumulated charg...
Digital power supplies based on experimental physics and industrial control system
Duan Yinchi, Li Ge, Weng Zhiyuan, Zhou Yingui
2018, 30: 025002. doi: 10.11884/HPLPB201830.170134
Abstract:
Based on the experimental physics and industrial control system (EPICS), a servo power controller is designed to be inserted into the existing power supply for testing its function of measurement and control in real time. The power supply controller ...
Mechanical design of rail cooling pipe for electromagnetic launcher
Lin Lingshu, Yuan Weiqun, Zhao Ying, Wang Zhizeng, Yan Ping
2018, 30: 025003. doi: 10.11884/HPLPB201830.170322
Abstract:
In order to solve the high quantity of heat accumulation problems of the electromagnetic rail launcher, the rail cooling is necessary. This paper presents the basic principles for setting cooling pipes inside the rail from two aspects of mechanical p...
Design of 500 kV sub-nanosecond pulsed X-ray generator
Zhang Xiaoqiang, Zhao Guangyi, Zhou Lin, Jiang Zhanxing, Liang Chuan, Li Mingjia, Wang Zhen
2018, 30: 025004. doi: 10.11884/HPLPB201830.170389
Abstract:
Sub-nanosecond high energy X-ray source is widely used in calibration of time response characteristic and sensitivity of radiation detectors. A compact generator for sub-nanosecond X-ray pulse was developed, covering a floor area of 1.2 m×40 cm with ...
Design and experimental study of compact pulse power driver
Wang Peng, Luo Min, Kang Qiang, Tan Jie, Luo Guangyao, Xiang Fei
2018, 30: 025005. doi: 10.11884/HPLPB201830.170358
Abstract:
The ring pulse forming line which uses BaTiO3 material is developed. Material characteristics and the influence of electric field distribution on the electric strength of the pulse forming line are analyzed. Due to optimizations of structure design a...
Repetitive pulsed power generator based on inductive-energy-storage pulse forming line
Yu Liang, Sugai Taichi, Tokuchi Akira, Jiang Weihua
2018, 30: 025006. doi: 10.11884/HPLPB201830.170390
Abstract:
It is a new way to obtain nanosecond high voltage pulse by employing inductive pulse forming line and voltage adder technology. In this paper, the basic principle of the generator is described, and two kinds of prototype pulse generators (single line...
Design and actualization of high electromagnetic compatibility high power constant-current supply
Zhao Juan, Li Bo, Li Xiqin, Cao Ningxiang, Huang Bin, Yu Zhiguo, Zhang Xin, Wang Lan, Li Hongtao
2018, 30: 025007. doi: 10.11884/HPLPB201830.170359
Abstract:
High intensity electromagnetic interference will be induced during the operation of the " Dragon-Ⅱ" linear induction accelerator, which will interfere the operation of the key equipments such as the constant current supply. The characteristics of the...
Investigation on charge-discharge properties of glass-ceramic based pulse forming lines
Zhang Qingmeng, Luan Chongbiao, Tang Qun, Li Hongtao
2018, 30: 025008. doi: 10.11884/HPLPB201830.170329
Abstract:
Large-sized (Pb, Sr)Nb2O6-NaNbO3-SiO2 glass ceramic plate was fabricated via melt-quenching followed by controlled crystallization. Its dielectric properties and charge-discharge properties were investigated. The results show that the dielectric cons...
Accelerator Technology
Stripper foil installation and aerodynamics analysis
Chen Jiaxin, Yu Jiebing, Kang Ling, Zheng Jiaxu, Wang Anxin, Wang Guangyuan, Nie Xiaojun
2018, 30: 025101. doi: 10.11884/HPLPB201830.170114
Abstract:
In the operation process of spallation neutron source injection system, the stripper foil is the key equipment to realize the conversion of negative hydrogen ions into proton injection. The nanometer to micrometer thick stripper foil is ultra-thin an...
CT method for accurately sizing flaws in metallic material
Qi Zicheng, Ni Peijun, Jiang Wei, Zhang Weiguo, Guo Zhimin
2018, 30: 025102. doi: 10.11884/HPLPB201830.170304
Abstract:
The model of CT measurement for X-ray attenuation in metallic materials was established by using image Point Spread function(PSF) approximation, the numerical calculation on the gray scale amplitude perpendicular to the X-ray plane boundary was condu...
Nuclear Science and Engineering
Simulation of intense electron beam time-dependent energy deposition on anode target of high-current diode
Hu Yang, Yang Hailiang, Zhang Pengfei, Sun Jiang, Sun Jianfeng
2018, 30: 026001. doi: 10.11884/HPLPB201830.170251
Abstract:
This paper presents a new method to obtain the time-dependent electron beam energy deposition at different anode target position. First, the electron beam energy should be discrete according to diode working time, so that the electron beam in each ti...
In-situ detection method of harmful elements in landfill
Li Kewei, Ling Yongsheng, Zhang Haojia, Shan Qing, Hei Daqian, Jia Wenbao
2018, 30: 026002. doi: 10.11884/HPLPB201830.170226
Abstract:
Toxic and harmful elements of living garbage can easily cause soil and groundwater contamination around the landfill. In-situ monitoring of harmful elements in landfills can provide the necessary technical support for safe and stable operation of lan...
Improving calculation efficiency of neutron multiplicity counting by sequential detection events simulation
Zhu Jianyu, Li Rui, Huang Meng, Xu Xuefeng
2018, 30: 026003. doi: 10.11884/HPLPB201830.170256
Abstract:
Neutron multiplicity counting (NMC) has been widely used in many fields related to non-destructive nuclear material measurement, such as nuclear material protection control and accounting, arms control verification and so on. Developing simulation to...
Variance reduction method based on adjoint discrete ordinate
Zheng Zheng, Ding Qianxue, Zhou Yan
2018, 30: 026004. doi: 10.11884/HPLPB201830.170223
Abstract:
For deep-penetration shielding calculation, Monte Carlo method (MC method) requires modeling a great number of particles to obtain reliable results, thus huge computation time is the main problem of the MC method. Source biasing and weight window tec...
Leakage-corrected fast reactor assembly calculation with Monte-Carlo code and its validation methodology
Cai Li
2018, 30: 026005. doi: 10.11884/HPLPB201830.170254
Abstract:
A leakage model based on B1 homogeneous equations has been implemented in continuous-energy Monte Carlo code TRIPOLI4. This leakage model algorithm iterates between the point-wise Monte Carlo simulation and a B1 homogeneous equation solver till reach...
Applications of Laser and Particle Beams
Numerical simulation of transient temperature field under the interaction between laser and metal materials
Huang Jiang, Shi Wenqing, Xie Yuping, An Fenju, Li Yongqiang
2018, 30: 029001. doi: 10.11884/HPLPB201830.170374
Abstract:
The temperature detection of laser is an important subject in the field of laser, which affects its applications in engineering directly. The XL-800WF multi-function laser welding machine was used to irradiate the thick steel plate and the melting gr...