2012 Vol. 24, No. 08

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2012, 24.
Research progress in electromagnetic solitons resulted from laser-plasma interaction
Cai Dafeng, Gu Yuqiu, Wang Jian, Zheng Zhijian
2012, 24: 1765-1769. doi: 10.3788/HPLPB20122408.1765
Abstract:
The electromagnetic solitons generated by laser-plasma interaction is one of the main non-linear phenomena in plasmas. The paper introduces the investigation on the electromagnetic solitons in plasmas and some important numerical simulation results. ...
Imaging characteristics of 2.5 keV multilayer Kirkpatrick-Baez microscope
Yi Shengzhen, Mu Baozhong, Jiang Li, Zhu Jingtao, Wang Zhanshan, Cao Zhurong, Dong Jianjun
2012, 24: 1770-1774. doi: 10.3788/HPLPB20122408.1770
Abstract:
A 2.5 keV multilayer Kirkpatrick-Baez microscope was developed and its imaging characteristics were studied from aspects of optical design and experimental calibration. The optical parameters were determined by analyzing the influences of grazing inc...
Analyzing stray light on line structures of different critical dimensions based on Kirk test
Huang ZHenfen, Cao Yiping, CHen Deliang, Wu YingcHun
2012, 24: 1775-1779. doi: 10.3788/HPLPB20122408.1775
Abstract:
The Kirks stray light simulation model is adopted to study the variation of stray light on different line structures, and the effects of stray light on imaging of different line structures are analyzed according to be image contrast. The simulation b...
Influence of diffuse transmission screen on intensity distribution of incident laser
Wu Juan, Zhou Shan, Pang Miao, Gao Xueyan, Hu Xiaoyang
2012, 24: 1780-1784. doi: 10.3788/HPLPB20122408.1780
Abstract:
On the basis of the Lamberts cosine law, the light intensity of a point on the receiving screen behind the diffuse transmission glass screen was theoretically deduced. Combining the application of the diffuse transmission glass screen in the power mo...
Narrowband multilayers with low Z materials
Wu Wenjuan, Zhu Jingtao, Zhang Zhong, Wang Fengli, Chen Lingyan, Zhou Hongjun, Huo Tonglin
2012, 24: 1785-1788. doi: 10.3788/HPLPB20122408.1785
Abstract:
Mo/Si multilayer are normally used in the early extreme ultraviolet (EUV) astronomical observation. In recent years people want to get observations in higher spectral resolution. Multilayer with low=Z materials have been studied. Four kinds of multil...
Wide-temperature-range athermalization for MWIR hybrid refractive/diffractive optical system
Shen Mande
2012, 24: 1789-1792. doi: 10.3788/HPLPB20122408.1789
Abstract:
A hybrid refractive/diffractive Petzval lens has been designed. Its working wavelength range is 3.2-4.5 m, full field of view is 8.42, efficient focal length is 95 mm and back focal length is 60.5 mm. The Petzval lens consists of four lenses, includi...
Adjustment of surface stress state of 5B05 aluminum alloy by laser shock wave
Feng Aixin, Shi Fen, Sun Huaiyang, Xue Wei, Nie GuiFeng, Li Bin, Han Zhenchun
2012, 24: 1793-1796. doi: 10.3788/HPLPB20122408.1793
Abstract:
The residual stress of shock spot and its boundary points, before and after laser shock processing(LSP), was measured by X-ray diffractometer at three different directions. According to the calculation formulae of principal stress and its direction a...
Method for lower order aberration correction based on beam shaping
Guo JianzenG, Liu TieGen, WanG Zhenhua, Liu Xiankui, Wei ChenGfu
2012, 24: 1797-1800. doi: 10.3788/HPLPB20122408.1797
Abstract:
To meet the requirements for far-field laser beam irradiation strength, and reduce the impact of thermal effect on the output beam performance, this paper introduces a lower order aberration correction method based on beam shaping. According to the b...
Diffraction characteristics of serrated circular aperture with random radius
Wang Jinguo, Zhu Zhanda, Sun Zhe, Hui Yongling, Lei Hong, Li Qiang
2012, 24: 1801-1805. doi: 10.3788/HPLPB20122408.1801
Abstract:
This paper studies the diffraction characteristics of a serrated circular aperture with random radius, and puts forward and proves that the aperture can further improve the near-field distribution of the beam and reduce the diffraction modulation in ...
Modulation on incident laser induced by repaired subsurface defect in fused silica
Zhang Yanlei, Xiao Jun, Yuan Xiaodong, He Shaobo, Jiang Yong, Liu Chunming
2012, 24: 1806-1810. doi: 10.3788/HPLPB20122408.1806
Abstract:
The effect of the repaired subsurface defect with Gaussian profile in fused silica on incident laser is studied according to the scalar diffraction theory. The Matlab simulation results agree with the experiment results. It is shown that modulation o...
Numerical analysis of system transfer function in interferometric imaging system
Xu Jiancheng, Wang Feizhou, Deng Yan, Chai Liqun
2012, 24: 1811-1815. doi: 10.3788/HPLPB20122408.1811
Abstract:
The performance of phase imaging in interferometric imaging system is well characterized by the system transfer function (STF). The STF of the interferometric imaging system is analyzed numerically by assuming that the system is linear and shift-inva...
Reflection properties of cat-eye optical system with misaligned reticles
Zhang Yue, Hua Wenshen, Zhou Bin, Ma Zuohong, Li Xiaoming, Zou Xiao
2012, 24: 1816-1820. doi: 10.3788/HPLPB20122408.1816
Abstract:
Aiming at eliminating the cat-eye effect of electro-optical devices and decreasing the probability that optics windows are detected by active laser reconnaissance systems, reflection properties of the cat-eye optical system with misaligned reticles a...
Experimental research of fiber coupling based on mini-bar
Tan Hao, Guo Linhui, Li Jianmin, Gao Songxin, Tang Chun, Wu Deyong
2012, 24: 1821-1825. doi: 10.3788/HPLPB20122408.1821
Abstract:
The paper investigates fiber coupling based on mini-bar. The mini-bar we packaged can deliver 60 W output power when the operating current is 60 A, and its central wavelength is 973.7 nm with the FWHM of 4.16 nm. The smile of this mini-bar is 0.57 m....
Simulation on spatial resolution of scintillator arrays based on neutron penumbral imaging system
Yu Bo, Su Ming, Liu ShenYe, Huang Tianxuan, Chen Bolun, Jiang Wei, Pu Yudong, Yan Ji
2012, 24: 1826-1830. doi: 10.3788/HPLPB20122408.1826
Abstract:
In order to compare three kinds of scintillation detectors,the Monte Carlo method is introduced to calculate the spatial resolution and energy deposition of scintillator arrays with different fiber diameters. According to simulation results, the reso...
Film-formation trend and film coverage percentage of continuous convective self-assembling of 2D colloidal crystals
Ye Xin, Huang Jin, Zhou Xinda, Zhang Jicheng, Jiang Xiaodong, Wu Weidong, Tang Yongjian
2012, 24: 1831-1835. doi: 10.3788/HPLPB20122408.1831
Abstract:
The dynamics of polystyrene(PS) micro-spheres in thin layers of continuous convective self-assembly of 2D colloidal crystals was studied systemically. The mechanisms of void and stripe patterns were analyzed, based on the model of assembly. To explai...
Sweep time performance of optic streak camera
Wang Zhebin, Yang Dong, Zhang Huige, Zhang Huan, Jiang Xiaohua, Wang Chuanke, Kuang Longyu, Liu Yonggang, Zhu Tuo, Peng Xiaoshi, Zhang Chen, Liu Hao, Li Zhichao, Li SanWei
2012, 24: 1836-1840. doi: 10.3788/HPLPB20122408.1836
Abstract:
The sweep time performance of the optic streak camera(OSC) is of critical importance to its application. The systematic analysis of full-screen sweep velocity shows that the traditional method based on the averaged velocity and its nonlinearity would...
Resistance characteristics of Fe3O4/MgO(100) films at action of outfields
Cao Linhong, Wu Weidong, Tang Yongjian, Wang Xuemin
2012, 24: 1841-1845. doi: 10.3788/HPLPB20122408.1841
Abstract:
The outfield-induced resistance properties of Fe3O4/MgO(100) films were investigated. The Fe3O4 thin films were grown on MgO(100) substrates by laser molecular beam epitaxy (L-MBE). The Fe3O4 epitaxial film could be grown with the (200) face of MgO s...
Temporal measurement of nanosecond laser pulse based on wave clipping of plasma
Sun Zhihong, Xia Yanwen, Dong Jun, Liu Hua
2012, 24: 1846-1850. doi: 10.3788/HPLPB20122408.1846
Abstract:
The temporal profiles of two beams were obtained using comparison method , and then the energy reduction factor was acquired. The two beamsone passing through a transparent medium is clipped by laser-induced plasma, and the other transmits with a del...
Numerical simulation of betatron X-ray emission from laser-produced wakefield accelerated electrons
Yang Zuhua, Zhao Zongqing, Tan Fang, Cao Leifeng, Gu Yuqiu, Xiao Shali, Yan Yonghong, Yu Jinqing, Fan Wei, Qian Feng
2012, 24: 1851-1855. doi: 10.3788/HPLPB20122408.1851
Abstract:
To find a solution for the high brightness, ultra-short pulse X-ray source, the betatron X-ray mechanism was studied. It is based on the interactions which generate the laser wake field acceleration (LWFA), between the ultra-intense short laser and t...
Sheath characteristics of vacuum arc plasma for mixed ion beam
Chen Lei, Jin Dazhi, Shi Lei, Tan Xiaohua, Dai Jingyi, Hu Side,
2012, 24: 1856-1860. doi: 10.3788/HPLPB20122408.1856
Abstract:
The dynamic sheath model and the analytic expression of the vacuum arc plasma for mixed ion beam are presented based on the collision less model. The variations of the sheath width and electric-field strength as the function of the ion density and su...
Monte Carlo simulation on X-ray backlighting imaging in fast ignition research
Han Dan, ZHao Zongqing, SHan Lianqiang, Tan Fang
2012, 24: 1861-1866. doi: 10.3788/HPLPB20122408.1861
Abstract:
In fast ignition researches, fuel density is usually diagnosed by X-ray backlighting imaging with an X-ray source produced by laser irradiating metal target. The simulation on the X-ray backlighting imaging has been performed using a Monte Carlo code...
Surface flashover of cross-linked polystyrene material in vacuum
Zhu Quanyao, Yang Qing, Yu Yue, Li Zhaolong, Wang Meng, Liu Yu, Chen Wen
2012, 24: 1867-1870. doi: 10.3788/HPLPB20122408.1867
Abstract:
The vacuum surface tests of cross-linked polystyrene material were carried out. Relations between the vacuum surface flashover voltage and the molecular chain structure and inner impurities of the material were respectively investigated. The results ...
Relative calibration of chemical vapor deposited diamond X-ray detector
Hou Lifei, Li ZHicHao, Yuan Yongteng, Kuang Longyu, Yang GuoHong, Liu SHenye
2012, 24: 1871-1873. doi: 10.3788/HPLPB20122408.1871
Abstract:
The relative calibration of a chemical vapor deposited (CVD) diamond X-ray detector has been completed on the shenguang-Ⅱ laser facility. Signals of the CVD diamond detector and an absolute-calibrated flat response X-ray diode (XRD) for X-ray radiati...
Elastic and thermodynamic properties of erbium dihydrideunder high temperature and pressure
Liu Yiding, Tang Yongjian
2012, 24: 1874-1878. doi: 10.3788/HPLPB20122408.1874
Abstract:
First principles theoretical study of the elastic and thermodynamic properties of erbium dihydride in fluorite structure, such as volume, thermal expansion, bulk modulus and isochoric heat capacity at different temperatures and pressures is performed...
Energy spectra of protons driven by ultra-short laser interaction with thin gold foils
Lu Jianxin, Lan Xiaofei, Huang Yongsheng, Wang Leijian, Xi Xiaofeng, Tang Xiuzhang, Yang Dawei
2012, 24: 1879-1881. doi: 10.3788/HPLPB20122408.1879
Abstract:
Proton acceleration experiments were performed by using an ultra-short laser to irradiate gold foils of 5 m and 2.1 m in thickness. The ultra-short laser pulse had the pulse duration of 120 fs and energy of 11 mJ. The peak focal intensity remained ar...
High-precision measuring technique for geometric quantities of microsphere target in microtarget assembly
Shi Shuai, Zhang Lin, Wu Wenrong, Qiu Zurong
2012, 24: 1882-1886. doi: 10.3788/HPLPB20122408.1882
Abstract:
To meet the high-precision requirement of microtarget assembly in inertial confinement fusion (ICF) experiments, this paper proposes a new technique for the size and position of measuring the size and position of the microsphere target in microtarget...
Weighting method to improve recovery ratio of radiation flux for flat response X-ray diffraction
Song Tianming, Yang Jiamin, Yi Rongqing, Li Zhichao, Yuan Yongteng, Li Sanwei
2012, 24: 1887-1890. doi: 10.3788/HPLPB20122408.1887
Abstract:
In inertial confinement fusion(ICF) experiments, the flat response X-ray diode(XRD) array is used to detect the evolution of radiation fluxes of the hohlraum from different directions. The spectrum response of flat response XRD is not perfectly flat,...
Halo and dark zones at capsule shell interface in X-ray phase contrast imaging
Yan Ji, Jiang Shao’en, Chen Li, Lin Zhiwei
2012, 24: 1891-1895. doi: 10.3788/HPLPB20122408.1891
Abstract:
X-ray phase contrast imaging experiments have been performed on micro-focus X-ray facility and Shenguang-Ⅱ laser driven plasma X-ray source. The Halo and dark zones at capsule shell interface have been found. Our work proposed the principle of light ...
L-shell X-ray emission measurement of Au plasma produced by intense femtosecond laser
Yang Zhaorui, Yuan Ping, Li Zhongwen, Yang Zhihu
2012, 24: 1896-1900. doi: 10.3788/HPLPB20122408.1896
Abstract:
Experiments on interaction between intense femtosecond laser and high-purity gold were performed on the SILEX-Ⅰ laser facility. The single-photon counting X-ray CCD camera was used to measure the L-shell X-ray emission from Au plasma at different las...
Two-dimensional magnetic reconnection model for incompressible plasmas
Dan Jiakun, Duan Shuchao, Zhang Zhengwei
2012, 24: 1901-1906. doi: 10.3788/HPLPB20122408.1901
Abstract:
A modified two-dimensional magnetic reconnection model is presented which focuses on the role of electrostatic field generated by charge separation in magnetic reconnection, and the E cross B drift causing the Alfvnic outflows. This reconnection mode...
Numerical study on discharge process of microcavity plasma
Xia Guangqing, Wang DongXue, Xue Weihua, Zhu Guoqiang, Zhu Yu
2012, 24: 1907-1913. doi: 10.3788/HPLPB20122408.1907
Abstract:
The evolution of plasma parameters during high pressure discharge in the microcavity with a hollow anode was numerically studied, with a two-dimensional self-consistent fluid model. The simulations were performed with argon at 13.3 kPa. The numerical...
Radiation converter of fusion reaction historyd iagnosticf acility for fusion
Su Ming, Xu Tao, Wang Feng, Chen Bolun, Jiang Wei, Yu Bo, Peng XiaoShi, Pu Yudong, Jing Longfei, Huang Tianxuan, Liu Shenye
2012, 24: 1914-1918. doi: 10.3788/HPLPB20122408.1914
Abstract:
The fusion reaction history is valuable information for inertial confinement fusion experiment research. The Geant4 toolkit was used to study the system performance of the fusion reaction history diagnostic facility based on gas Cherenkov detector. T...
Errors treatment technique for optical parameters characterization of thin film
Wu Suyong, Long XingWu, Yang Kaiyong
2012, 24: 1919-1924. doi: 10.3788/HPLPB20122408.1919
Abstract:
A technique of errors treatment is presented according to the negative impact of systematic errors, which is hard to eliminate in photometric measurement data, on the characterization accuracy of thin film optical parameters. In order to minimize the...
Output circuit design for double gap coaxial cavity loaded with waveguide filter
Xie Xingjuan, Huang Chuanlu, Dong Yuhe, Ding Yaogen, Liu Pukun
2012, 24: 1925-1930. doi: 10.3788/HPLPB20122408.1925
Abstract:
The high-order mode coaxial cavity output circuit and the double-gap coupled cavity circuit are important for high frequency, high power and broadband klystrons. In this study, the two structures mentioned above are combined. The real part of the gap...
Study and application of single-cavity model of coupled cavity structure
He Jun, Huang Mingguang, Hao Baoliang, Liu Pukun
2012, 24: 1931-1935. doi: 10.3788/HPLPB20122408.1931
Abstract:
In the simulation of high frequency characteristics of coupled cavity structure, the quasi-period boundary method is usually adapted for its high precision. However, the fake solution exists in the double-cavity simulation model. In this paper, the s...
Design of single-anode magnetron injection gun for 94 GHz gyrotron oscillator
Xia Mengzhong, Liu Dagang, Yan Yang, Yang Chao, Liu Laqun, Peng Kai
2012, 24: 1936-1940. doi: 10.3788/HPLPB20122408.1936
Abstract:
A single-anode magnetron injection electron gun is designed and simulated according to the requirements of a 94 GHz gyrotron oscillator. On the basis of detailed theoretical analysis about the operating principle of the gun by programming, the design...
Magnet measurement using 2D automatic rotation Helmholtz coils
Chen Nian, He Yongzhou, Ren Fanglin, Qian Zhenmei, Zhang Jidong
2012, 24: 1941-1946. doi: 10.3788/HPLPB20122408.1941
Abstract:
A magnet measurement method using 2D automatic rotation Helmholtz coils has been proposed to improve the measurement efficiency and accuracy of magnets in the research and development of undulators and wigglers. Theoretical analysis reveals that auto...
Minimum emittance of three-bend achromats
Li Xiaoyu, Xu Gang
2012, 24: 1947-1950. doi: 10.3788/HPLPB20122408.1947
Abstract:
The calculation of the minimum emittance of three-bend achromats (TBAs) made by Mathematica software can ignore the actual magnets lattice in the matching condition of dispersion function in phase space. The minimum scaling factors of two kinds of wi...
Detection algorithm of infrared dim target based on digital signal processor
Yu Hongming, Wan Min, Gu Jingliang
2012, 24: 1951-1955. doi: 10.3788/HPLPB20122408.1951
Abstract:
A high efficiency algorithm for detecting infrared dim target based on digital signal processor (DSP) is proposed. It is designed especially for thecloud edge left after the image preprocessing of irregular clouds, and it is a searching algorithm bas...
Impulse calculation for irregularly shaped space debris under laser irradiation
Jin Xing, Chang Hao, Hong YanJi, Li Xiuqian
2012, 24: 1956-1960. doi: 10.3788/HPLPB20122408.1956
Abstract:
The impulse of irregularly shaped space debris under laser irradiation was calculated, on the basis of the experimental phenomenon that reverse jetting under laser ablation is always normal to the irradiated surface no matter what the laser incident ...
Laser-induced time-resolved solid-surface fluorescence spectra system
Xu Liang, Liu Hongjie, Huang Jin, Zhou Xinda, Wang Fengrui, Wu Weidong,
2012, 24: 1961-1964. doi: 10.3788/HPLPB20122408.1961
Abstract:
A system has been designed with the oblique incidence optical structure to measure the time-resolved solid-surface fluorescence spectra. The system was applied to measure the time-resolved solid-surface fluorescence spectra of ZnO films excited by 35...
Spatial distribution of damping coefficient of ablated particles prepared by pulsed laser ablation in Ar gas
Wang Yinglong, Hu Ziqiang, Deng Zechao, Zhai Xiaolin, Chu Lizhi, Ding Xuecheng, Fu Guangsheng
2012, 24: 1965-1969. doi: 10.3788/HPLPB20122408.1965
Abstract:
The nanocrystalline silicon thin films were deposited on circular substrates with radiuses of 2.0, 2.5, 3.0, 3.5 and 4.0 cm by pulsed laser ablation in argon gas of 10 Pa at room temperature. The surface morphology and microscopic structure of the fi...
Particle-in-cell simulation on focusing of intense electron beam
Dong Pan, Dai Zhiyong, Xie Yutong, Liao Shuqing, Zhu Jun, Zhuang Huang
2012, 24: 1970-1974. doi: 10.3788/HPLPB20122408.1970
Abstract:
The study uses the particle-in-cell method to simulate the focusing of intense electron beam with the thin magnetic lens. The focusing model of intense electron beam was established and to simulate one experiment on Dragon-I accelerator. The simulati...
Automatic weak-current measurement system with high precision
Wang Jing, Li Binkang, Ruan Linbo, Tian Geng, Li Xianbao, Qu Hongguang
2012, 24: 1975-1979. doi: 10.3788/HPLPB20122408.1975
Abstract:
A weak current measurement system is developed. It is mainly used in the accurate measurement of weak current in radiation detection. The principle of the measurement system is introduced. The interference protection measures of current-to-voltage (I...
Implementation of secondary emission in three dimensional PIC numerical simulation
Liu Laqun, Liu Dagang, Wang Xueqiong, Peng Kai, Yang Chao
2012, 24: 1980-1984. doi: 10.3788/HPLPB20122408.1980
Abstract:
The theory of secondary electrons produced by electrons impacting the metal surface was discussed. Formulas of some important physical parameters were summarized, including secondary electron emission coefficient, and inelastically backscattered elec...
Equivalentmass thermal motion model of neutron transport in water at different temperatures
Zhu Jinhui, Zhuo Jun, Tao Yinglong, Wei Yuan, Huang Liuxing
2012, 24: 1985-1989. doi: 10.3788/HPLPB20122408.1985
Abstract:
In the Monte Carlo simulation, the S(,) model can only be used in some given temperature. The paper proposes the equivalent mass thermal motion model of neutron transport in water at different temperatures. The free gas thermal motion model is analyz...
Staggeredblade photon beam position monitor at Hefei Light Source
Gu LiminG, Sun BaoGen, Lu PinG, YanG YonGlianG, Xiao Yunyun, WanG JiGanG, ChenG Chaocai
2012, 24: 1990-1994. doi: 10.3788/HPLPB20122408.1990
Abstract:
In order to reduce the influence of beam size, a photon beam position monitor (PBPM) called staggered-blade PBPM was designed and installed in the machine diagnostic beamline (MDBL) at the Hefei Light Source (HLS), and Libera Photon was used for data...
Dispersity of closure time of multiple switches on stacked Blumleins
Wang Songsong, Shu Ting, Yang HanWu
2012, 24: 1995-1999. doi: 10.3788/HPLPB20122408.1995
Abstract:
The pulse forming line based on high dielectric constant ceramic dielectrics requires stacked Blumleins configuration with multi-switch triggering. Through the theory of pulse forming process, the effect of multiple switches dispersity of closure tim...
Diagnosis of multi-gap gas switch with optical fiber detectors
Li Yang, Sun Tieping, Sheng Liang, Zhang Mei, Yue Zhiqin, Wei FuLi, Wang Peiwei
2012, 24: 2000-2004. doi: 10.3788/HPLPB20122408.2000
Abstract:
A set of fiber detector which consists of an optical fiber array detector and a solar-blind plug-in optical sensor was developed for multi-gap gas switch optical diagnosis. The detailed discharging process was monitored using the detector and the inf...
Application of dielectric ceramics on solid-state pulse forming lines
Wang Yilin, Yang Qunbao, Wu Wenjun, Li Yongxiang, Lai Qinggui, Wang Huacen, Long Jidong
2012, 24: 2005-2008. doi: 10.3788/HPLPB20122408.2005
Abstract:
The paper investigates the dielectric materials for compact pulse forming lines. According to the interrelation between parameters of pulse forming lines and dielectric properties of ceramic materials, the strategies of the material choice and assess...
Inductance of six-stage gas switch of fast linear transformer driver
Cong Peitian, Sun Tieping, Qiu AiCi, Zeng Zhengzhong
2012, 24: 2009-2012. doi: 10.3788/HPLPB20122408.2009
Abstract:
A six-stage gas switch with low inductance developed for fast linear transformer drivers (LTDs) is described, and the inductance of the switch with single channel and multi-channel discharges is investigated. The measured inductance ofthe switch with...
Conservational model for formation process of magnetic insulation
Wang Huihui, Meng Lin, Liu Dagang, Yang Chao, Peng Kai
2012, 24: 2013-2016. doi: 10.3788/HPLPB20122408.2013
Abstract:
For the plane magnetically insulated transmission line(MITL), coaxial MITL, and cone MITL, the analytical expression of initial current is derived according to the conservation of magnetic flux, and the analytical expression of initial voltage is der...