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RSS2007 Vol. 19, No. 03
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2007,
19.
Abstract:
The influence of the channel parameters of the water-cooled Si mirror on temperature and thermal deformation was simulated using ANSYS finite element analysis. The results show that the channel parameters have significant effects on the thermal defor...
The influence of the channel parameters of the water-cooled Si mirror on temperature and thermal deformation was simulated using ANSYS finite element analysis. The results show that the channel parameters have significant effects on the thermal defor...
2007,
19.
Abstract:
The sub-surface damage(SSD) in optied components formed in the process of whetting and polishing is analyzed. Utilizing the mechanism of wet etching and the Marangoni interface effect, CNC chemical etching technique is used to achieve high precision ...
The sub-surface damage(SSD) in optied components formed in the process of whetting and polishing is analyzed. Utilizing the mechanism of wet etching and the Marangoni interface effect, CNC chemical etching technique is used to achieve high precision ...
2007,
19.
Abstract:
Theoretical and experimental study is presented on grating period-tuned single-resonated quasi-phase-matched optical parametric oscillator in multi-grating periodically poled MgO-doped lithium niobate(PPMgLN) pumped by 1 064 nm laser. Theoretical ana...
Theoretical and experimental study is presented on grating period-tuned single-resonated quasi-phase-matched optical parametric oscillator in multi-grating periodically poled MgO-doped lithium niobate(PPMgLN) pumped by 1 064 nm laser. Theoretical ana...
2007,
19.
Abstract:
A new kind of angle of arrival fluctuation measurement by differential image motion method(DIMM) is introduced. Fried parameter of two orthogonal base line directions can be obtained by angle of arrival fluctuation variance. The experiment results of...
A new kind of angle of arrival fluctuation measurement by differential image motion method(DIMM) is introduced. Fried parameter of two orthogonal base line directions can be obtained by angle of arrival fluctuation variance. The experiment results of...
2007,
19.
Abstract:
Through the energy attenuation method of combining two cuneiform prisms and a neutral attenuator, the polarization of COIL whose power density is 20 W/mm2 was measured. The corner cubes were used as the retroreflectors of stable cavity, thus the unif...
Through the energy attenuation method of combining two cuneiform prisms and a neutral attenuator, the polarization of COIL whose power density is 20 W/mm2 was measured. The corner cubes were used as the retroreflectors of stable cavity, thus the unif...
2007,
19.
Abstract:
The optics window of photoelectric equipment has strong reflecting characteristics for the incident laser beam, which is known as cat eye effect. In order to study the suitability of cat eye effect for active laser detection and analyse the effect of...
The optics window of photoelectric equipment has strong reflecting characteristics for the incident laser beam, which is known as cat eye effect. In order to study the suitability of cat eye effect for active laser detection and analyse the effect of...
2007,
19.
Abstract:
In the experiments, it was found that the momentum coupling coefficient of multi-pulse propulsion was lower than that of the single pulse case for the air-breathing mode. To learn the mechanism of this phenomenon, the multi-pulse simulation of the pa...
In the experiments, it was found that the momentum coupling coefficient of multi-pulse propulsion was lower than that of the single pulse case for the air-breathing mode. To learn the mechanism of this phenomenon, the multi-pulse simulation of the pa...
2007,
19.
Abstract:
The spectrum of the signal pulses with big chirped coefficient distrusts linearly around the central wavelength in the temporal domain, which characters has been used in the numerical simulation methods, namely the fourth order Runge-algorithm, to st...
The spectrum of the signal pulses with big chirped coefficient distrusts linearly around the central wavelength in the temporal domain, which characters has been used in the numerical simulation methods, namely the fourth order Runge-algorithm, to st...
2007,
19.
Abstract:
Numerical simulation of chemical oxygen-iodine laser(COIL) flows with nitrogen diluent based on RADICL setup was carried out. A finite-volume code was used to solve 3D compressible N-S equations with 10 components, 13 non-equilibrium chemical reactio...
Numerical simulation of chemical oxygen-iodine laser(COIL) flows with nitrogen diluent based on RADICL setup was carried out. A finite-volume code was used to solve 3D compressible N-S equations with 10 components, 13 non-equilibrium chemical reactio...
2007,
19.
Abstract:
The inner flow field’s influence on beam was simulated to study how to design the tube’s inner structure when blowing non-absorbing gas in them to depress thermal-effect of air. The beam-gas-effect model was adopted as well as a Z-like tube and a U-l...
The inner flow field’s influence on beam was simulated to study how to design the tube’s inner structure when blowing non-absorbing gas in them to depress thermal-effect of air. The beam-gas-effect model was adopted as well as a Z-like tube and a U-l...
2007,
19.
Abstract:
A method is put forward to stabilize the second harmonic generation using phase mismatching. BBO type Ⅰ phase matching SHG course and KTP type Ⅱ phase matching course were simulated. Simulation results show that both type Ⅰ and type Ⅱ phase matching ...
A method is put forward to stabilize the second harmonic generation using phase mismatching. BBO type Ⅰ phase matching SHG course and KTP type Ⅱ phase matching course were simulated. Simulation results show that both type Ⅰ and type Ⅱ phase matching ...
2007,
19.
Abstract:
The infrared small target de-noising in complicated background is studied. According to de-correlation and energy compaction of wavelet transforms, a new de-noising method is proposed. The method is put forward with the consideration of the practical...
The infrared small target de-noising in complicated background is studied. According to de-correlation and energy compaction of wavelet transforms, a new de-noising method is proposed. The method is put forward with the consideration of the practical...
2007,
19.
Abstract:
HfO2 thin films were prepared with chemical method. The influences of heat treatment, UV irradiation and addition of inorganic Al2O3 on laser-induced damage thresholds (LIDT) of HfO2 thin films were studied. HfO2 thin films were characterized by FTIR...
HfO2 thin films were prepared with chemical method. The influences of heat treatment, UV irradiation and addition of inorganic Al2O3 on laser-induced damage thresholds (LIDT) of HfO2 thin films were studied. HfO2 thin films were characterized by FTIR...
2007,
19.
Abstract:
Alpha iron nanoparticles with about 20~100 nm size were obtained in the W/O microemulsion system. The iron nanoparticles/PS composites were synthesized through a bulkpolymerization method using the dispersed mixed liquid including styrene and Fe nan...
Alpha iron nanoparticles with about 20~100 nm size were obtained in the W/O microemulsion system. The iron nanoparticles/PS composites were synthesized through a bulkpolymerization method using the dispersed mixed liquid including styrene and Fe nan...
2007,
19.
Abstract:
Using the model of transient stimulated rotational Raman scattering (SRRS) and considering many factors, such as the molecular density of nonlinear medium, the gain coefficient, the depletion of pump laser, the nonlinear amplification of the Stokes f...
Using the model of transient stimulated rotational Raman scattering (SRRS) and considering many factors, such as the molecular density of nonlinear medium, the gain coefficient, the depletion of pump laser, the nonlinear amplification of the Stokes f...
2007,
19.
Abstract:
Experiments about interaction of 527 nm laser with disk targets were conducted on “Xingguang-Ⅱ” facility. The scattering mechanism of stimulated Brillouin scattering (SBS) were studied. The energy angular distribution of scattered lights was obtained...
Experiments about interaction of 527 nm laser with disk targets were conducted on “Xingguang-Ⅱ” facility. The scattering mechanism of stimulated Brillouin scattering (SBS) were studied. The energy angular distribution of scattered lights was obtained...
2007,
19.
Abstract:
Resorcinol-formaldehyde(RF) gel films were synthesized by a series of processes such as sol-gel, supercritical drying and carbonization using resorcinol and formaldehyde. The main factors that affect the properties of aerogels such as HAC content and...
Resorcinol-formaldehyde(RF) gel films were synthesized by a series of processes such as sol-gel, supercritical drying and carbonization using resorcinol and formaldehyde. The main factors that affect the properties of aerogels such as HAC content and...
2007,
19.
Abstract:
Sodium stearate film of 0.28~0.40 μm thick was made by vacuum thermal evaporation. Sodium stearate film was investigated by Fourier transform IR spectroscopy. Results indicate that sodium stearate film and sodium stearate have similar properties.Rese...
Sodium stearate film of 0.28~0.40 μm thick was made by vacuum thermal evaporation. Sodium stearate film was investigated by Fourier transform IR spectroscopy. Results indicate that sodium stearate film and sodium stearate have similar properties.Rese...
2007,
19.
Abstract:
Base on the model of gratingpair compressor, the formula of angular dispersion caused by alignment errors was derived. The compensative relations between the tilt angular errors and groovewidth difference were obtained and the compensative methods ...
Base on the model of gratingpair compressor, the formula of angular dispersion caused by alignment errors was derived. The compensative relations between the tilt angular errors and groovewidth difference were obtained and the compensative methods ...
2007,
19.
Abstract:
A new double-gap vircator for high power microwave generation is proposed and studied by simulation in this paper. In the vircator, the interaction cavity is a cylindrical cavity separated into two resonators by a metal foil with a hole in the center...
A new double-gap vircator for high power microwave generation is proposed and studied by simulation in this paper. In the vircator, the interaction cavity is a cylindrical cavity separated into two resonators by a metal foil with a hole in the center...
2007,
19.
Abstract:
The sheet beam klystron is a new kind of microwave vacuum device, which uses a high aspect ratio, thin rectangular beam to reduce space charge effects, increase power capability and beam-wave interaction efficiency. In this paper, an X-band SBK cavit...
The sheet beam klystron is a new kind of microwave vacuum device, which uses a high aspect ratio, thin rectangular beam to reduce space charge effects, increase power capability and beam-wave interaction efficiency. In this paper, an X-band SBK cavit...
2007,
19.
Abstract:
The response of electromagnetic pulse penetrating building walls is analyzed using FDTD and Fourier analysis method. The pulse responses within a wide frequency band are calculated based on periodic boundary condition and Gaussian pulse. Through the ...
The response of electromagnetic pulse penetrating building walls is analyzed using FDTD and Fourier analysis method. The pulse responses within a wide frequency band are calculated based on periodic boundary condition and Gaussian pulse. Through the ...
2007,
19.
Abstract:
Heat stress reaction was induced by irradiation of high-power 8 millimeter wave on both mice and rats. Four periods of their stress reaction——quiet period, guarding period, deadlock period, prostrating period were observed. The pain threshold tempera...
Heat stress reaction was induced by irradiation of high-power 8 millimeter wave on both mice and rats. Four periods of their stress reaction——quiet period, guarding period, deadlock period, prostrating period were observed. The pain threshold tempera...
2007,
19.
Abstract:
Bipolar junction transistors may be burned out by injected electromagnetic pulse. The effects of electromagnetic pulse injected from base on bipolar junction transistor were studied with 2-dimensional simulation. Results show that the hot spot locate...
Bipolar junction transistors may be burned out by injected electromagnetic pulse. The effects of electromagnetic pulse injected from base on bipolar junction transistor were studied with 2-dimensional simulation. Results show that the hot spot locate...
2007,
19.
Abstract:
A 1-D multifrequency non-linear model of the beam-wave interaction in a helix TWT is described. The field, phase and motion equations which contains the space charge field and the equations of the cut area are represented. Taking into account the vol...
A 1-D multifrequency non-linear model of the beam-wave interaction in a helix TWT is described. The field, phase and motion equations which contains the space charge field and the equations of the cut area are represented. Taking into account the vol...
2007,
19.
Abstract:
In the finite-difference time-domain(FDTD) method, the perfectly matched layer(PML) is a kind of high efficient absorbing boundary condition. By adding the terms of physical electric conductivity and magnetic conductivity in the conventional PML equa...
In the finite-difference time-domain(FDTD) method, the perfectly matched layer(PML) is a kind of high efficient absorbing boundary condition. By adding the terms of physical electric conductivity and magnetic conductivity in the conventional PML equa...
2007,
19.
Abstract:
As far as the convergence half angles of Pierce electron guns vary in a wide range，some corresponding logical functions for Tiwary non-iterative method have been proposed. Using the improved approach, the results agree well with that of Vaughan itera...
As far as the convergence half angles of Pierce electron guns vary in a wide range，some corresponding logical functions for Tiwary non-iterative method have been proposed. Using the improved approach, the results agree well with that of Vaughan itera...
2007,
19.
Abstract:
Theoretical model of a double- cusp gun for Ka- band second harmonic gyro- TWT amplifier was analyzed, and the electron beam performance parameters were calculated. Using EGUN simulation, a double- cusp gun producing large orbit gyration electron bea...
Theoretical model of a double- cusp gun for Ka- band second harmonic gyro- TWT amplifier was analyzed, and the electron beam performance parameters were calculated. Using EGUN simulation, a double- cusp gun producing large orbit gyration electron bea...
2007,
19.
Abstract:
This paper compares the temperature distribution and warm up time between assembly cathode heated up by conduction and non-assembly cathode heated by radiation using the thermal analysis module of ANSYS. The results show that both of them have a unif...
This paper compares the temperature distribution and warm up time between assembly cathode heated up by conduction and non-assembly cathode heated by radiation using the thermal analysis module of ANSYS. The results show that both of them have a unif...
2007,
19.
Abstract:
The basic theories, the characteristics and the woking process of the extended interaction oscillator(EIO) were introduced. A type of EIO was simulated using PIC. The effect of the cathode voltage, the radius of the electron beam, the number and the ...
The basic theories, the characteristics and the woking process of the extended interaction oscillator(EIO) were introduced. A type of EIO was simulated using PIC. The effect of the cathode voltage, the radius of the electron beam, the number and the ...
2007,
19.
Abstract:
Charge density distribution of the large-orbit hollow beam, which is applied to a Gyro-TWA, is obtained from time-integrated image. The image is created by a phosphor scintillator on the cross section vertical to the transmission axial. Comparison of...
Charge density distribution of the large-orbit hollow beam, which is applied to a Gyro-TWA, is obtained from time-integrated image. The image is created by a phosphor scintillator on the cross section vertical to the transmission axial. Comparison of...
2007,
19.
Abstract:
The current synchronization trigger mode is important for Z-pinch experiments carried out on the YANG accelerator. The technology can solve the problem of low synchronization precision. The inherent delay time between the load current waveform and th...
The current synchronization trigger mode is important for Z-pinch experiments carried out on the YANG accelerator. The technology can solve the problem of low synchronization precision. The inherent delay time between the load current waveform and th...
2007,
19.
Abstract:
The induction voltage adder is often used for voltage multiplication. During inductive adding there are wave incidence and reflection. Travel wave method has been used to analyze this process with the assistance of transformation matrix. Its stable s...
The induction voltage adder is often used for voltage multiplication. During inductive adding there are wave incidence and reflection. Travel wave method has been used to analyze this process with the assistance of transformation matrix. Its stable s...
2007,
19.
Abstract:
The ground simulation tests of proton irradiation for Kapton/Al films were conducted using the space synthesis irradiating facility, in which the energy of protons was chosen as 90 keV, and the flux was 5.0×1011 cm-2·s-1. The degradation of optical p...
The ground simulation tests of proton irradiation for Kapton/Al films were conducted using the space synthesis irradiating facility, in which the energy of protons was chosen as 90 keV, and the flux was 5.0×1011 cm-2·s-1. The degradation of optical p...
2007,
19.
Abstract:
A novel electron-beam lithography based on overlapped increment scanning is presented. The impact of the depth and exposure dose on the absorbed energy density, and the relationship between the solution rate and the absorbed energy density are analyz...
A novel electron-beam lithography based on overlapped increment scanning is presented. The impact of the depth and exposure dose on the absorbed energy density, and the relationship between the solution rate and the absorbed energy density are analyz...
2007,
19.
Abstract:
Using a geometrical optical method, a model for analytic calculation about ellipticity error effect in neutron penumbral imaging is established. An analytic formula of neutron absorbing length is derived from the model, and a general analytical expre...
Using a geometrical optical method, a model for analytic calculation about ellipticity error effect in neutron penumbral imaging is established. An analytic formula of neutron absorbing length is derived from the model, and a general analytical expre...
2007,
19.
Abstract:
This paper describes the field emission characteristics of electrochemically fabricated lanthanum hexaboride (LaB6) single tip emitters. It is found that high pressure operation will significantly enlarge the effective emission area and emission curr...
This paper describes the field emission characteristics of electrochemically fabricated lanthanum hexaboride (LaB6) single tip emitters. It is found that high pressure operation will significantly enlarge the effective emission area and emission curr...
2007,
19.
Abstract:
The state-of-the-art about surface flashover across semiconductor all over the world is reviewed. Different types of electrode configuration are employed and influence factors on flashover characteristics are discussed. The process of flashover is di...
The state-of-the-art about surface flashover across semiconductor all over the world is reviewed. Different types of electrode configuration are employed and influence factors on flashover characteristics are discussed. The process of flashover is di...
2007,
19.
Abstract:
According to the principle of pulse wavefront compression, the model of a shock line circuit is proposed and the computing formulas of wavefront compression are deduced. The shock line is a nearly continuous high-impedance transmission line loaded at...
According to the principle of pulse wavefront compression, the model of a shock line circuit is proposed and the computing formulas of wavefront compression are deduced. The shock line is a nearly continuous high-impedance transmission line loaded at...
2007,
19.
Abstract:
The influence of the approaching speed of two conductors on the air electrostatic discharge (ESD) was investigated by theoretical analysis and experimental measurement. The self-capacitance (mutual-capacitance) coefficient, the potential difference, ...
The influence of the approaching speed of two conductors on the air electrostatic discharge (ESD) was investigated by theoretical analysis and experimental measurement. The self-capacitance (mutual-capacitance) coefficient, the potential difference, ...
