2005 Vol. 17, No. 09

Recommend Articles
高功率激光与光学
Numerical simulation of damage evolution on mechanical behavior and tensile spallation of pure aluminium under laser shock loading
wang yong-gang, boustie m, he hong-liang, sekine t, wang li-li, jing fu-qian
2005, 17.
Abstract:
By using a modified damage function model in which the dynamic failure of shocked matter was analogous to a percolation process and a stress release function which was proposed to describe the void coalescence behavior based on the percolation critic...
Optical current sensor with four paths for measuring high pulse current
deng xiang-yang, li ze-ren, tian jian-hua, liu jun, peng qi-xian
2005, 17.
Abstract:
Based on conventional optical current sensor, a new measuring technology of optical current sensor with four paths was put forward. As its four output signals were accurately able to obtain the azimuth of polarization, the measuring scope of current ...
Similarity of thermo-mechanical effect induced by high energy laser beam
ding sheng, wang jian-guo, wang yu-heng, liu feng
2005, 17.
Abstract:
Based on dimensional analytic theory and non-dimensionalized thermo-mechanical coupling equations for high energy laser beam irradiation, this paper presents the similarity criterion and the scaling law for thermo-mechanical coupling effect induced b...
Portable lidar ceilometer for cloud-base height measurement
wang qing-mei, zhang yi-mo, liu tie-gen, zheng yi-zhong
2005, 17.
Abstract:
The algorithm of a portable lidar ceilometer for cloud-base height measurement was developed. The zero-crossing of lidar return slope was considered the location of the cloud base. Since the cloud was different from the atmosphere in random noise in ...
Far-field analysis of ultrashort pulse through the tiled gratings
zuo yan-lei, wei xiao-feng, zhu qi-hua, liu hong-jie, wang xiao, ying chun-tong
2005, 17.
Abstract:
From the Huygens-Fresnel principle, an integral expression with the chromatic aberration was obtained of the field amplitude of a beam with a shape of a quarter of a circle. From the integral expression amplitude expressions of the coherent addition ...
Effect of temperature on measuring system of long focal length
dong jun, xu qiao, cai bang-wei, zhang ning, li rui-jie
2005, 17.
Abstract:
On the basis of Talbot effect of Ronchi grating, the influence of temperature on the stability of the measuring system of long focal length has been theoretically analyzed. It has been testified by experiment that the fluctuation of refractive index ...
Effect of laser setup position relative to trajectory on dynamic heating
ma li-ke, lu qi-sheng, zhao guo-min, jiang hou-man
2005, 17.
Abstract:
According to the incidence angular factor of the laser beam, the locations of the laser setup above the ground are classified. The methods of geometrical analysis and numerical simulation are used. It is indicated that when a focused laser beam heats...
Study of low jitter and small drift switch pulse generator
wu deng-sheng, zhang xiong-jun, zheng kui-xing, lu jing-ping, tian xiao-lin, dong yun, feng zong-ming
2005, 17.
Abstract:
The stability of the switch pulse generator output will influence the reliability of large aperture electro-optic switch synchronizing with the laser pulse. The drift and jitter of the output pulse are important parameters of the stability. The exper...
Studies on subsurface damage detection and wetetching process of K9 optics
chen ning, zhang qing-hua, xu qiao, wang shi-jian, duan li-hua
2005, 17.
Abstract:
Effects of wet-etching with four kinds of etching solution on the surface of K9 optical components were examined. By investigating the change pattern of wet-etching rate at different depth and surface parameters before and after corrosion, the depth ...
Thermal effect of T TiO2/SiO2/K9 film by 1.06 μm CW laser
zhou wei-jun, yuan yong-hua, gui yuan-zhen, shen zhi-xue
2005, 17.
Abstract:
1.06 μm CW-Nd:YAG laser with different intensity was used to irradiate TiO2/SiO2/K9 film component, and the temperature rise of the film surface with time was measured by thermal MP575. A program was used to calculate the temperature field of laser w...
Interacting multiple model algorithm in target tracking
zheng li-yi, pan xu-dong, chen xing-wu, song hai-feng
2005, 17.
Abstract:
In order to resolve the maneuvering problem in target tracking, an algorithm based on interacting multiple model(IMM) method was presented. In this method every sub-model has its own model match probability that changes with the target's estimated st...
Simulation analysis of in-line digital holography for particles measurement
chen peng-fei, li ze-ren, zhao jian-lin, ye yan
2005, 17.
Abstract:
In particle measurement, in-line holography is widely used. The main advantage is that the setup is very simple, and the reconstruction process is convenient. The process of particle measurement using digital holography was numerically simulated. Two...
ICF与激光等离子体
Aluminium target with deep amplitude modulation fabricated by chemical wet etching process
sun qi, zhou bin, yang fan, shen jun, wu guang-ming
2005, 17.
Abstract:
The aluminium modulation target used to study the Rayleigh-Taylor instability in the resolved experiments of Inertial Confined Fusion (ICF) was fabricated. Based on semiconductor photolithography technology and chemical wet etching process, the strip...
A new homochromous depolarizer applied in ICF
deng qing-hua, sui zhan, li ming-zhong, wang jian-jun, luo yi-ming, tang jun
2005, 17.
Abstract:
A new kind of depolarizer consisting of three parts(one is canted quartz crystal and the other two are canted fused quartz glasses) is designed. Two such depolarizers are used together (the principal axis of the second are at 45° to that of the first...
Research on structure and micro-distortion of nano Fe/Al films fabricated by pulse laser deposition
wang feng, li jun, li guo-jun, wu wei-dong, tang yong-jian, sun wei-guo
2005, 17.
Abstract:
In this paper Fe/Al alloy thin films were fabricated by pulse laser deposition(PLD), and the crystal phase, structure and micro-strain were studied. The deposition rate of films decreased with the increasing substrate temperature. The AFM pictures sh...
Ne-like Ge 19.6 nm X-ray laser driven by 2ω1ω pumping scheme
qiao xiu-mei, zhang guo-ping, zhang tan-xin
2005, 17.
Abstract:
Theoretical study of Ne-like X-ray laser may provide insight into the Ni-like X-ray laser. A series of TCE (transient collisional excitation) Ne-like Ge X-ray laser experiments driven by 2ω1ω pulses were designed and the Ne-like Ge 19.6 nm X-ray lase...
Influence of pertinence of physical parameters on uncertainty of experimental data
shu hua, fu si-zu, huang xiu-guang, ma min-xun, gu yuan
2005, 17.
Abstract:
This paper discussed the influence of the pertinence of two couples of physical parameters on the uncertainty of particle velocity and the shock pressure of test sample. The influence was estimated from calculation of experimental data. By a great de...
Scanning Hartmann inspection apparatus
liu dan, yan yan, ren bing-qiang, zhao yong-kai, huang li-hua, huang hui-jie, wang xiang-zhao
2005, 17.
Abstract:
A scanning Hartmann inspection apparatus has been developed on the basis of the traditional Hartmann test principle. It can inspect large-aperture focusing lenses up to 300 mm in diameter within the full aperture. The apparatus consists of a large-ap...
Experiment of cladding pumped femtosecond fiber amplifier
shen hua, ding guang-lei, wang yi-shan, zhao wei
2005, 17.
Abstract:
Experiment of the double-clad erbium-ytterbium co-doped fiber amplifiers were discussed. This fiber with hexagonal inner clad is utilized as gain medium to amplify femtosecond pulse, which is pumped by LD with pigtail fiber. The signal with 10.8 mW a...
Fuel components in ICF targets at vapor-liquid equilibrium phase
wang jin-shan, zhu yu-qun, jiang chao
2005, 17.
Abstract:
According to Raoult's law and Dalton's partial-pressure laws, the mixture of D2, T2 and DT fuel components in the proportion of 3∶3∶4 in an ICF target is analyzed on the basis of mass conservation, under the vapor-liquid equilibrium phase at several ...
Systemic calculation and assessment of atomic properties of argon ions: I. Electron impact excitation
yao jian-hong, li ping, liu chun-lei, pang jin-qiao, he bin, wang jian-guo, qiu yu-bo, yan jun
2005, 17.
Abstract:
Based on quasi-relativistic distorted wave Born approximation with exchange, the electron impact excitation cross sections between configurations of H-, He-, and Li-like argon ion were calculated systemically and compared with previous theoretical pr...
Experimental discovery of X-ray new spectral series and interpretation
wang da-lun, zhang xin-wei
2005, 17.
Abstract:
Hydrogen (deuterium) gas discharge source was used to bombard target of non-crystalloid deuterate polyethylene polymethylmethacrylate, etc. The scattering spectrum was measured. There are several sharp X-ray spectral lines on the scattering spectrum,...
Experimental study of large-ratio ?ffner stretcher for OPCPA laser system
wang hong-ying, liu hong-jun, xiong hong-jun, zhu shao-lan, zhao wei, wang yi-shan, chen guo-fu
2005, 17.
Abstract:
According to the design and the principle of the ffner stretcher, the pulse stretcher for OPCPA laser system was experimentally investigated. Using the numerical method, the four key parameters were appropriately selected, that is the angle of incide...
Fabrication technology of Al/Cu impedance match EOS measurement target
xie jun, wu wei-dong, du kai, ye cheng-gang, huang li-zhen, zheng feng-cheng, li zhao-yang, ma xiao-jun, yuang guang-hui, zhu lei
2005, 17.
Abstract:
The fabrication process of Al/Cu impedance-match EOS measurement target was discussed. With the rolling and diffusion-bonding technologies, the Al/Cu impedance-match EOS measurement target was successfully fabricated. The structure and surface roughn...
Study of electroless plating for copper hohlraum fabrication
wan xiao-bo, zhang lin, zhou lan, xiao jiang
2005, 17.
Abstract:
This paper introduces the electroless plating technique to fabricate integral Cu hohlraum on the surface of pretreated PMMA axis. Some parameters effect on the deposition rate and solution stability, such as the CuSO4 content, reducing agent content,...
高功率微波
Design and experiment research on an oversize mode-transducing antenna
yuan cheng-wei, liu qing-xiang, zhong hui-huang
2005, 17.
Abstract:
Under the circumstance of oversize coaxial waveguide, the traditional coaxial mode converter with four metal plates inserted does not satisfy the unique-mode requirement. In this paper, an oversize mode converter is designed with eight metal plates i...
On-line measurement of microwave power in ECR ion source
zhou chang-geng, kang wu, hu yong-hong, li yan, lou ben-chao, zu xiu-lan, xiong ri-heng, chen jun-guang, li xiao-yun
2005, 17.
Abstract:
It is a new technology to apply an ECR ion source to the neutron generator. Because of the structure limitation, working state of the ECR ion source could not be judged by the color of gas discharging in discharge chamber. Therefore, it was hard to e...
Limitation of Qext calculation method based on reflectance phase
lin fu-min, wang zhi-yong, huang huan-hui
2005, 17.
Abstract:
The principle of the method based on reflectance phase for calculating the Qext of cavities is analyzed and the differences between the ideal coupling circuit used in the method and the practical equivalent circuit are pointed out in this paper. Firs...
Simulation of operating performance of oven magnetrons in radial non-uniform magnetic field
chen yan, yang zhong-hai, lei wen-qiang
2005, 17.
Abstract:
To improve the output spectrum of magnetron and make simulated model near to the practical structure, considering the practical structure of the permanent magnet and soft magnet, the magnetic field system of microwave oven magnetrons was modeled and ...
粒子束及加速器技术
Measurement of permeability and Q-factor of ferrite toroids
xu zhe, wang chun-xiao
2005, 17.
Abstract:
Winding coil on primary side of the ferrite toroid forms an inductor. The permeability of the ferrite changes with various biasing DC current in coils on secondary side of the ferrite. Thus the inductance of the ferrite changes correspondingly. In th...
Particles coupling between horizontal and vertical oscillations in CSRm
zhou xue-mei, xia jia-wen, song ming-tao, liu yong, yang jian-cheng, wu jun-xia, liu wei, mao li-jun
2005, 17.
Abstract:
Particles coupling might lead to the loss of particles in some condition. This paper described that the rotation of the main magnets and the existence of the solenoid were the reasons of the particles coupling between horizontal and vertical oscillat...
Experimental investigation of a high emission and intense current electron-beam diode
zhang yong-hui, chang an-bi, xiang fei, gan yan-qing, liu zhong, zhou chuan-ming
2005, 17.
Abstract:
A radial insulated diode with a high emission current density of electron-beam was introduced in this paper. As an experiment platform, the CHP01 accelerator was used to study the emission characteristics of the diode. This intense current electron-b...
Dynamic effects of octupole-magnets in HLS storage ring
wang lin, li yong-jun, feng guang-yao, zhang he, xu hong-liang, li wei-min, liu zu-ping
2005, 17.
Abstract:
In order to attain the design beam intensity of Phase II Project of Hefei Light Source(HLS), one family of octupoles were installed in the place where vertical Batatron function is relatively large in HLS storage ring. After adding octupoles, the hor...
Signal processing system for beam position monitor at HLS 200 MeV LINAC
li ji-hao, sun bao-gen, he duo-hui, lu ping, wang jun-hua, cao yong, zheng pu
2005, 17.
Abstract:
The parameter of beam positions at HLS 200 MeV LINAC is very important to injection efficiency. A new strip-line beam position monitor system was designed recently, which is not interceptive to beam, qualified in precision and easy to digitalize the ...
Experimental study on circuit parameters and breakdown properties of water switch under pulsed voltage
cong pei-tian, kuai bin, qiu ai-ci, wang liang-ping, wu han-yu, zeng zheng-zhong, jia wei
2005, 17.
Abstract:
Two kinds of self-breakdown water switches with different configurations for Qiangguang-I accelerator were described. The electrical model of the water switch was built. By estimation and Pspice calculation, the parameters of the switches were determ...
Energy response of photomultiplier tubes to neutron irradiation
zhang zhong-bing, ma yan-liang, ouyang xiao-ping, zhang guo-guang, zhang xian-peng, zhang jian-fu, zhang xiao-dong
2005, 17.
Abstract:
The photomultiplier tube (PMT) responding to direct neutron irradiation has an extreme effect on the scintillation detector design and its practical applications. The response mechanism of a photomultiplier tube interacting with an accelerator neutro...