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RSS2002 Vol. 14, No. 04
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2002,
14.
Abstract:
In electromagnetic imaging, ill-posed equations are unavoidable, which are very difficult to solve. The Genetic Algorithm (GA) is a numerical-optimization method. This paper analyzes the GA method and advantages in solving illposed equations of elec...
In electromagnetic imaging, ill-posed equations are unavoidable, which are very difficult to solve. The Genetic Algorithm (GA) is a numerical-optimization method. This paper analyzes the GA method and advantages in solving illposed equations of elec...
2002,
14.
Abstract:
A High Power Microwave square pyramidal Gaussian feed aperture field is analyzed by using the waveguide intrinsic mode expansion method. The key parameter is the Gaussian beam waist radius that is determinded by compromise of the radiation charateris...
A High Power Microwave square pyramidal Gaussian feed aperture field is analyzed by using the waveguide intrinsic mode expansion method. The key parameter is the Gaussian beam waist radius that is determinded by compromise of the radiation charateris...
2002,
14.
Abstract:
In order to have the high-power microwave(HPM) source of the three-unit transit-time tube oscillator(TTTO) has the character of unidirectional beam and line polarization, a circular waveguide bevel cut radiation antenna is designed. Experimental rese...
In order to have the high-power microwave(HPM) source of the three-unit transit-time tube oscillator(TTTO) has the character of unidirectional beam and line polarization, a circular waveguide bevel cut radiation antenna is designed. Experimental rese...
2002,
14.
Abstract:
The electromagnetic pulse radiation problem is the starting point for high power microwaves radiation, propagation and scattering. This paper applies the finite difference time domain technique(FDTD) combined with the timedomain measured equation of...
The electromagnetic pulse radiation problem is the starting point for high power microwaves radiation, propagation and scattering. This paper applies the finite difference time domain technique(FDTD) combined with the timedomain measured equation of...
Intense electromagnetic pulse induced breakdown effects in high temperature dissociated nitrogen gas
2002,
14.
Abstract:
A theoretical investigation on the intense electromagnetic pulse (EMP)induced breakdown process in high temperature nitrogen gas is given. The main character of high temperature gas isthat molecules in it dissociate in some degree, and this will affe...
A theoretical investigation on the intense electromagnetic pulse (EMP)induced breakdown process in high temperature nitrogen gas is given. The main character of high temperature gas isthat molecules in it dissociate in some degree, and this will affe...
2002,
14.
Abstract:
Unmagnetized plasma filled relativistic backward wave oscillator RBWO is analyzed by particleincell(PIC) simulation in this paper. The results show that output power is obtained only in a narrow plasma density and has a maximum value. Interaction p...
Unmagnetized plasma filled relativistic backward wave oscillator RBWO is analyzed by particleincell(PIC) simulation in this paper. The results show that output power is obtained only in a narrow plasma density and has a maximum value. Interaction p...
2002,
14.
Abstract:
The positron annihilation lifeti me spectrum(PALS) method was employed to study the effect of proton radiation on microstructure of the space grade KH-L-Y polysilicone rubber. The results show that both t 3, and I3 of the longest lifetime component a...
The positron annihilation lifeti me spectrum(PALS) method was employed to study the effect of proton radiation on microstructure of the space grade KH-L-Y polysilicone rubber. The results show that both t 3, and I3 of the longest lifetime component a...
2002,
14.
Abstract:
“Dragon-1” accelerator now is being constructed in CAEP. It will produce high current pulse electron beams. The main components of the accelerator include 72 induction accelerating cells and 18 connection cells with ports for beam diagnostic hardware...
“Dragon-1” accelerator now is being constructed in CAEP. It will produce high current pulse electron beams. The main components of the accelerator include 72 induction accelerating cells and 18 connection cells with ports for beam diagnostic hardware...
2002,
14.
Abstract:
One helical type of two-stage flux-trapping magnetic flux compression generators (type 8-6 MFCG) is described in this paper, by which the energy from capacity can be amplified in the first stage helix, and the power can be amplified in the second sta...
One helical type of two-stage flux-trapping magnetic flux compression generators (type 8-6 MFCG) is described in this paper, by which the energy from capacity can be amplified in the first stage helix, and the power can be amplified in the second sta...
2002,
14.
Abstract:
This article presents an oscillograph with both high time resolution and detection efficiency used in time-resolved neutron diagnosis in ICF (inertial confinement fusion). The oscillograph, comprising a neutron cathode, a specially designed electron ...
This article presents an oscillograph with both high time resolution and detection efficiency used in time-resolved neutron diagnosis in ICF (inertial confinement fusion). The oscillograph, comprising a neutron cathode, a specially designed electron ...
2002,
14.
Abstract:
Coler Storage Ring of Heavy Ion Research Facility in Lanzhou (HIRFLCSR) belongs to China great scientific project in China. The alignment for it is very difficult because of very large area and very high accuracy. For the special case in HIRFLCSR, ...
Coler Storage Ring of Heavy Ion Research Facility in Lanzhou (HIRFLCSR) belongs to China great scientific project in China. The alignment for it is very difficult because of very large area and very high accuracy. For the special case in HIRFLCSR, ...
2002,
14.
Abstract:
To measure the amount of pulse fission neutrons, we carried out the theoretical research of a new method. This paper introduces its principle of measuring pulse fission neutrons, states a new detection system for measuring the neutrons with a radiati...
To measure the amount of pulse fission neutrons, we carried out the theoretical research of a new method. This paper introduces its principle of measuring pulse fission neutrons, states a new detection system for measuring the neutrons with a radiati...
2002,
14.
Abstract:
The switch rate of thyratron is related to the triggering signal. The fast thyristor is usually used in the trigger circuit, but the triggering signal is not ideal. This paper brings forward a new method of substituting power MOSFET whose switch time...
The switch rate of thyratron is related to the triggering signal. The fast thyristor is usually used in the trigger circuit, but the triggering signal is not ideal. This paper brings forward a new method of substituting power MOSFET whose switch time...
2002,
14.
Abstract:
This paper presents the theoretical evaluation for the laser scattering from the waved seawater surface with the random facet model and the depolarization property of the seawater surface. The numerical results show that the scattering light is partl...
This paper presents the theoretical evaluation for the laser scattering from the waved seawater surface with the random facet model and the depolarization property of the seawater surface. The numerical results show that the scattering light is partl...
2002,
14.
Abstract:
Intense pulse X-ray is used to irradiate Si-SiO2 interface. Density of Si-SiO2 interface states and its annealing process are measured. Experiment results show that radiation-induced interface traps in Si-SiO2 are increased with dose of intense pulse...
Intense pulse X-ray is used to irradiate Si-SiO2 interface. Density of Si-SiO2 interface states and its annealing process are measured. Experiment results show that radiation-induced interface traps in Si-SiO2 are increased with dose of intense pulse...
2002,
14.
Abstract:
The effects of signalinduced background (SIB) of image intensifier on low-level-light target detection are analyzed. The results show that SIB is a signal dependent noise, and presents shot noise characteristics. It can't beeliminated by background ...
The effects of signalinduced background (SIB) of image intensifier on low-level-light target detection are analyzed. The results show that SIB is a signal dependent noise, and presents shot noise characteristics. It can't beeliminated by background ...
2002,
14.
Abstract:
In Chemical Oxygen-Iodine Laser (COIL) system, the water vapor produced from the generator of singlet oxygen can have severe negative effects on the output of the laser power. In this paper, the water vapor content in the counter-flow Jet type Single...
In Chemical Oxygen-Iodine Laser (COIL) system, the water vapor produced from the generator of singlet oxygen can have severe negative effects on the output of the laser power. In this paper, the water vapor content in the counter-flow Jet type Single...
2002,
14.
Abstract:
Based on the phenomenological theory of semiconductors and two-level model, according to the principle of cascading nonlinear system and by analyzing the Lyapunov exponents of its dynamics equations，the chaos disturbance mechanisms of extrinsic photo...
Based on the phenomenological theory of semiconductors and two-level model, according to the principle of cascading nonlinear system and by analyzing the Lyapunov exponents of its dynamics equations，the chaos disturbance mechanisms of extrinsic photo...
2002,
14.
Abstract:
During the phase II project of NSRL, in order to monitor the injecting effectiveness, damping rate and b oscillation after update of injection and RF system, a turn-by-turn system of HLS has been proposed for storage ring diagnostics. The system empl...
During the phase II project of NSRL, in order to monitor the injecting effectiveness, damping rate and b oscillation after update of injection and RF system, a turn-by-turn system of HLS has been proposed for storage ring diagnostics. The system empl...
2002,
14.
Abstract:
The statistics of the fractal dimension of the intensity image and the number of phase branch points in the light field of a collimated laser beam propagating through a turbulent atmosphere are evaluated for a series of numerically-generated field an...
The statistics of the fractal dimension of the intensity image and the number of phase branch points in the light field of a collimated laser beam propagating through a turbulent atmosphere are evaluated for a series of numerically-generated field an...
2002,
14.
Abstract:
For supersonic COIL, we deduced the rate equation (RE) model that can deal with the cases of homogenous and inhomogenous broadening being of equal importance and the case of inhomogenous broadening effect being predominating in this paper. The effect...
For supersonic COIL, we deduced the rate equation (RE) model that can deal with the cases of homogenous and inhomogenous broadening being of equal importance and the case of inhomogenous broadening effect being predominating in this paper. The effect...
2002,
14.
Abstract:
Theoretical analysis and detailed numerical simulation on optical parametric chirped pulse amplification(OPCPA) are presented in this paper. We obtain the character of optical gain and saturation amplification under different conditions of pumping be...
Theoretical analysis and detailed numerical simulation on optical parametric chirped pulse amplification(OPCPA) are presented in this paper. We obtain the character of optical gain and saturation amplification under different conditions of pumping be...
2002,
14.
Abstract:
This paper studies the optical quality such as the peak value (PV) of wavefront error, rms and strehl ratio (RS) of the free-vortex aerodynamic window(FADW) designed for the high energy lasers using the Hartmann-Shack sensing under different inlet to...
This paper studies the optical quality such as the peak value (PV) of wavefront error, rms and strehl ratio (RS) of the free-vortex aerodynamic window(FADW) designed for the high energy lasers using the Hartmann-Shack sensing under different inlet to...
2002,
14.
Abstract:
In this paper, the expression for axial intensity distribution of Laguerre-Gaussian beams passing through an aperture-lens separation system is derived using Collins formula. It is shown that aperture-lens separation affects the focal shift and inten...
In this paper, the expression for axial intensity distribution of Laguerre-Gaussian beams passing through an aperture-lens separation system is derived using Collins formula. It is shown that aperture-lens separation affects the focal shift and inten...
2002,
14.
Abstract:
A set of coupled nonlinear threedimension differential equations for the FEM amplifier with elliptical waveguide and planar wiggler is derived. Based on these equations, a universal numerical simulation program is developed independently. The chara...
A set of coupled nonlinear threedimension differential equations for the FEM amplifier with elliptical waveguide and planar wiggler is derived. Based on these equations, a universal numerical simulation program is developed independently. The chara...
2002,
14.
Abstract:
This paper presents the principle, structure and aberration-corrected designing of a flat focal field concave grating spectrograph. We designed and constructed a spectrograph instrument using varied spaced concave grating with 2 400 grooves/mm. Spect...
This paper presents the principle, structure and aberration-corrected designing of a flat focal field concave grating spectrograph. We designed and constructed a spectrograph instrument using varied spaced concave grating with 2 400 grooves/mm. Spect...
2002,
14.
Abstract:
On the base of analyzing the thermal lensing effect caused by the temperature-gradient in direction of unpolished-face, a new type construction consisted of absorbing glass, insulative glass and heat sink has been designed for adiabatic structure of ...
On the base of analyzing the thermal lensing effect caused by the temperature-gradient in direction of unpolished-face, a new type construction consisted of absorbing glass, insulative glass and heat sink has been designed for adiabatic structure of ...
2002,
14.
Abstract:
The focusing properties of Gaussian beams through a compound optical system consisting of a concave lens, a convex lens and a subsystem, are discussed. Based on the matrix optical method, formulae of the waist width and imaging distance of focused Ga...
The focusing properties of Gaussian beams through a compound optical system consisting of a concave lens, a convex lens and a subsystem, are discussed. Based on the matrix optical method, formulae of the waist width and imaging distance of focused Ga...
2002,
14.
Abstract:
The scale length is an important parameter of the low-frequency phase aberration. The mathematics model to get t he scale lengths of the phase aberration caused by rectangular optics is established and the scale lengths of some Nd-glass amplifiers ar...
The scale length is an important parameter of the low-frequency phase aberration. The mathematics model to get t he scale lengths of the phase aberration caused by rectangular optics is established and the scale lengths of some Nd-glass amplifiers ar...
Longterm measurements and statistics study on refractiveindex structure parameter of surface layer
2002,
14.
Abstract:
The data of refractive index structure parameter from 1997 to 2000 at a complex terrain in Hefei are studied statistically. Results of refractive index structure parameter in different ground covers, different seasons, different heights are presented...
The data of refractive index structure parameter from 1997 to 2000 at a complex terrain in Hefei are studied statistically. Results of refractive index structure parameter in different ground covers, different seasons, different heights are presented...
2002,
14.
Abstract:
In this paper, starting from a comparison of two optical symmetrizing systems, a detailed analysis of the symmetrization of astigmatic Hermite-Gaussian beams and related problems is made by using the generalized HuygensFresnel diffraction integral ....
In this paper, starting from a comparison of two optical symmetrizing systems, a detailed analysis of the symmetrization of astigmatic Hermite-Gaussian beams and related problems is made by using the generalized HuygensFresnel diffraction integral ....
2002,
14.
Abstract:
The liquid (ethanol) wetting characteristic and dynamical mechanical property of polystyrene foams prepared by inverse emulsion with various densities have been studied. The wetting rate increases while the foam density decreases. The foams' cell siz...
The liquid (ethanol) wetting characteristic and dynamical mechanical property of polystyrene foams prepared by inverse emulsion with various densities have been studied. The wetting rate increases while the foam density decreases. The foams' cell siz...
2002,
14.
Abstract:
In this paper, the basic concepts, reaction equipment, experimental research, theoretical research and present applications of electron cyclotron resonance microwave plasma(ECRMP) are reviewed. At the same time, its development in the future is also...
In this paper, the basic concepts, reaction equipment, experimental research, theoretical research and present applications of electron cyclotron resonance microwave plasma(ECRMP) are reviewed. At the same time, its development in the future is also...
2002,
14.
Abstract:
The physical process of dielectronic recombination for Hlike, Helike and Lilike ions of Mg and Al in the medial double ionized states plays an important role in studying laser inertial confinement fusion (ICF) electronic temperature by the method ...
The physical process of dielectronic recombination for Hlike, Helike and Lilike ions of Mg and Al in the medial double ionized states plays an important role in studying laser inertial confinement fusion (ICF) electronic temperature by the method ...
2002,
14.
Abstract:
In this paper, the technology of network parallel computing is applied to the study of microwave tubes. The network parallel computing model based on the TCP/IP protocol is obtained, which can calculate 2.5D TWT multisignal nonlinear beam-wave intera...
In this paper, the technology of network parallel computing is applied to the study of microwave tubes. The network parallel computing model based on the TCP/IP protocol is obtained, which can calculate 2.5D TWT multisignal nonlinear beam-wave intera...
2002,
14.
Abstract:
The metal conductor's physical process for electric exploding is presented. The relations of the resistivity of the metal conductor versus specific action, pressure, energy density, expansion speed of explosive products, density of conductor current ...
The metal conductor's physical process for electric exploding is presented. The relations of the resistivity of the metal conductor versus specific action, pressure, energy density, expansion speed of explosive products, density of conductor current ...
