2003 Vol. 15, No. 03

Recommend Articles
粒子束及加速器技术
Dynamic simulations of an ion diode for high power pulsed ion beams
xiang wei, zhao wei-jiang, han bao-xi, zeng bao-qing, yang zhong-hai
2003, 15.
Abstract:
Based on the explosive emission model, the self-consistent and 2.5 dimensional electromagnetic particle-in-cell MAGIC code was employed to simulate the dynamics of the particles, including electron and proton, in a planar magnetically insulated ion d...
New method to measure timing jitter of electron beam bunch micro-pulse
wu jin, wu gang, li yong-gui, dai jiang-ping
2003, 15.
Abstract:
This paper presents a new method for measuring the timing jitter of micropulse with high sensitivity. Using the traditional four-stripline beam monitor which has been used to measure the electron beam position and electron charge, and by comparing t...
Measurement technology of beam profile of the highcurrent shortpulse electronbeam
chen si fu, xia lian sheng, zhang lin wen, ding bo nan
2003, 15.
Abstract:
It’s very important to get information on beam profile for researching of accelerator. Measurement technology of beam profile of the highcurrent shortpulse electronbeam such as Faraday cup array, Multiwire method, bremsstrahlung radiation, cerenk...
Irradiation effect of neutrons on a-SiC:H films
liu gui-ang, xie er-qing, wang tian-min
2003, 15.
Abstract:
Amorphous hydrogenated silicon carbide(aSiC:H) films were prepared by the reactive sputtering method,which were irradiated by high energy neutrons.Using resistivity,Raman scattering,and infrared transimissing spectroscopy,the authors investigated th...
Plasma wave effect of ion channel electron beam cyclotron maser
tang chang jian, gong yu bin, qian shang jie, zhang hong run
2003, 15.
Abstract:
The plasma wave nonlinear effect of IonChannel Electron Cyclotron Maser (ICECM) is investigated. Using these methods of fluid theory and self nonlinear theory, the micromechanism in ICECM are analyzed. Studies find that the longitudinal focus is in...
Estimating research on space low dose rate radiationinduced charge effects
he bao ping, wang gui zhen, gong jian cheng, zhou hui, guo hong xia
2003, 15.
Abstract:
This paper presents an estimate method on radiationinduced charge effect from LC4007A and LC4007B device in lowdose space environment. According to the result, on the basis of MILSTD 883C, Test Method 1019.4, 60Co irradiation plus 25℃ annealing ca...
Analysis on quadrupole system condition analysis of 9MeV traveling wave LINAC
wei yong, li quan-feng
2003, 15.
Abstract:
Aiming at the triplet quadrupole system of 9 MeV traveling wave LINAC used for customs container inspection system, this paper analyses that the influences of beam focusing characteristics between quadrupole and skew quadrupole system. Along with ana...
200kV/100kA low jitter ring type field distortion switch
li hong-tao, ding bo-nan, xie wei-ping, deng jian-jun, wang huo-ming, wang yu-juan, fu zhen, wan bu-yong, ren jing, meng wei-tao, gong de-sen, qin wei-dong, dai ying-min
2003, 15.
Abstract:
This paper reported the results of the investigation of a 200kV/100kA low jtter low prefire probability ring rail field distortion switch. Its jitter was less than 2 ns when its working voltage was larger than 70% of selfbreakdown voltage. When its w...
Study of scintillator resolution in radiography system
tan zhao, li ze ren, jiang xiao guo
2003, 15.
Abstract:
Xray is always returned to visible light for detection by scintillator in high energy radiography systems. The system spatial resolution is affected by scintillator thickness, material and energy of the input X photons. This influence is analyzed th...
Experimental research of electrical breakdown for water dieletric coaxial capacitor with microsecond charging
liu jin liang, li ji jian, chen dong qun, zhang jian de, li yong zhong, feng jia huai, xu liu rong
2003, 15.
Abstract:
The experimental apparatus of coaxial water capacitor was set up in microsecond charging condition. Some experiments were done in this device, the voltage of breakdown of coaxial capacitor is measured with positive and negative pulse voltage to charg...
Spectroscopic diagnosis of RF ion source plasma
tang ping ying, liu tie, ding bo nan, dai jing yi
2003, 15.
Abstract:
Plasma characteristics of an RF ion source were investigated by emission spectroscopy. The RF ion source, applied in ZF200keV neutron generator, is an orbicular discharge RF ion source coupled with inductance. The spectral line intensities of the fi...
Beams emittance study in an injector of photocathode RF cavity
xiao xiao guang, hu ke-song, li zheng-hong, li ming
2003, 15.
Abstract:
Beams emittance is a very important parameter of the RFinjector, it is growth due to RF field space charge effects and so on. The analytical expression of beams emittance in RF injector has been given in this paper, it shows that beams emittance is ...
高功率激光与光学
Research of pulsed laser induced ripple damage on the surface of copper film mirror
wang wei ping, l bai da, liu cang li, zhang da yong, luo yong quan, gu zhuo wei
2003, 15.
Abstract:
The damaged spot of copper film mirror irradiated by pulsed Nd:YAG laser is analyzed using an optical microscope. The periodic damage ring is found at the laser irradiation spot, the average spacing of these rings is about 45μm. The damage ring can b...
Effect of pH value on the scatter particles in KDP crystal
sun xun, li yun nan, gu qing tian, wang sheng lai, li yi ping, gao zhang shou, fang chang shui
2003, 15.
Abstract:
Effect of pH value on the scatter particles in KDP crystal was discussed in this paper. The results showed that scatter particles have different size and density at different growth pH value. It can be seen from the results that the scatter particles...
Interaction of power laser beam with supersonic free shear layer
he xu zhao, yi shi he
2003, 15.
Abstract:
Based on the discussion of the law of the interaction between opticfield and fluidfield, this paper uses the physical model of highenergy laser beam crossing through the two dimension supersonic free shot flow. We obtained density map and OPD map...
Measure and research of mirrors disalignment for COIL resonator
liu yan, jin yu qi, sang feng ting, sun yi zhu, liu qin, zhang zhi guo
2003, 15.
Abstract:
To insure reliable and accurate measurement results of mirror angular displacement for COIL resonator, indirect measurement was found using electronic autocollimator. Measurement results show that thermal radiation is main reason of mirror angular di...
Damage of optical materials induced by SBS process under biharmonic laser irradiation
guo shao feng, lu qi sheng, cheng xiang ai, jiang hou man, yin yan
2003, 15.
Abstract:
The concept of coherent coupling of optics and mechanics is presented here and its mechanism is analyzed. The coupled wave theory of nonlinear optics is adopted to establish nonlinear dynamics model describing generation and evolution of coherent aco...
Study on deposition efficiency of sectioned surface discharge
yu li, yi ai-ping, liu jing-ru, ma lian-ying, zhang yong-sheng, zeng zheng-zhong
2003, 15.
Abstract:
Taking advantage of a module of impacted sectioned surface discharge source, the changes of resistance, inductance and energy deposition efficiency of the circuit under various experimental parameters including charging voltage, capacitance and gas p...
ICF与激光等离子体
Algorithm research on focal spot reconstruction for high power laser output
xie xu dong, chen bo, he ling, liu hua, xia yan wen, su chun yan, lu zong gui
2003, 15.
Abstract:
With the combination of CCD imaging unit and traditional multiimage camera to measure far-field distribution of laser output, the reconstruction algorithm for focal spot of high power solid state laser output was described. The geometric cores of th...
Study of the static wavefront distortion of optics elements in the multipass amplification system
liu lan qin, jing feng, peng zhi tao, zhu qi hua, cheng xiao feng, jiang dong bin, zhang qing quan, liu hong jie
2003, 15.
Abstract:
Through the study of the effect of the static wavefront distortion of optics elements in the multipass amplification system, the phase RMS gradient meeting the demand of the focusing is given, which is about 0.007λ/cm. The maximum phase error value ...
Experimental investigation in farfield test technique for high power laser output
he ling, chen bo, liu hua, xia yan wen, xie xu dong, su chun yan, lu zong gui
2003, 15.
Abstract:
In experiment, three systems were designed to measure the energy distribution of the laser beam in the far field. Under the same conditions, the far field of the laser beam was measured independently by three instruments: long focus lens, rattle pair...
Focusing characteristics and diffraction efficiency of the holographic lens in ICF driver system
yang chun-lin, zhang rong-zhu, yang li-ming, xu qiao
2003, 15.
Abstract:
According to the working principle of the holographic lens, two of the most important parameters, focusing characteristics and diffraction efficiency, were analyzed in this paper. And the factors, which influence the two parameters, were discussed. F...
高功率微波
Numerical analysis on hole coupling effects of an oblique incidence of electromagnetic pulse
fu ji-wei, hou chao-hen, dou li-hua
2003, 15.
Abstract:
The finite-difference time-domain method is used to research the rule of the electromagnetic pulse coupled to the cavity with different kinds of holes on it. The coupling effects of EMP on square, rectangle hole,multi-hole and the rule of EMP having ...
Numerical analysis on the nearfield of the EMP radiator
lu feng, chen bin, yi yun, zhou bi-hua, pei yu-ling
2003, 15.
Abstract:
The EMP radiator is the key part of the portable measurement equipment of electric field shielding efficacy . In this dissertation a plan of a small-sized EMP radiator is provided, and the radioactive near field emitted by radiator is analyzed by the...
Effects of He gas filling on multiwave Cerenkov generator operation
zhang jun, zhong hui huang, liu lie
2003, 15.
Abstract:
The operating process of the multiwave Cerenkov generator with a resonant cavity is simulated when being filled with He gas at various density by PIC method. The generation mechanism of the plasma and its effects on the output microwave are analyzed....