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RSS2008 Vol. 20, No. 07
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2008,
20.
Abstract:
With an external cavity containing a wavelength-chirped volume Bragg grating, multi-wavelength beam combining is realized with a standard bar of 49 emitters. The width of the emitter is 100 μm, and the fill factor is 0.5. Beam quality factor of 6 for...
With an external cavity containing a wavelength-chirped volume Bragg grating, multi-wavelength beam combining is realized with a standard bar of 49 emitters. The width of the emitter is 100 μm, and the fill factor is 0.5. Beam quality factor of 6 for...
2008,
20.
Abstract:
By means of analyzing the point source transmittance of the laser receiver with optical structure of cylindric cavity, the feasibility and relative light power demand to jam laser rangefinder with the stray light is investigated. According to the inc...
By means of analyzing the point source transmittance of the laser receiver with optical structure of cylindric cavity, the feasibility and relative light power demand to jam laser rangefinder with the stray light is investigated. According to the inc...
2008,
20.
Abstract:
The damage processes of fused silica under the fundamental frequency and third harmonic of Nd:YAG laser were studied with instantaneous scattering pulses measurements via fast photodiodes and high bandwidth oscilloscope. The optical micrographs of ab...
The damage processes of fused silica under the fundamental frequency and third harmonic of Nd:YAG laser were studied with instantaneous scattering pulses measurements via fast photodiodes and high bandwidth oscilloscope. The optical micrographs of ab...
2008,
20.
Abstract:
A theory based on energy-band is used to study the free electron density in material conductive band and to investigate the interaction of laser and optical material. The relationship between the damage threshold and the laser-wave length, the pulse ...
A theory based on energy-band is used to study the free electron density in material conductive band and to investigate the interaction of laser and optical material. The relationship between the damage threshold and the laser-wave length, the pulse ...
2008,
20.
Abstract:
The definition and measuring principle of laser beam quality foctor are introduced.The uncertainty sources of beam quality are analyzed. The standard uncertainty and combined standard uncertainty are calculated based on some experimental data.Specifi...
The definition and measuring principle of laser beam quality foctor are introduced.The uncertainty sources of beam quality are analyzed. The standard uncertainty and combined standard uncertainty are calculated based on some experimental data.Specifi...
2008,
20.
Abstract:
Microtemperature method is used to measure the turbulence strength of different positions near the telescopic dome which is an isolated building. From analyzing the refractive index structure parameter near the dome and the same parameter at tower, ...
Microtemperature method is used to measure the turbulence strength of different positions near the telescopic dome which is an isolated building. From analyzing the refractive index structure parameter near the dome and the same parameter at tower, ...
2008,
20.
Abstract:
The kinetics and microscopic mechanisms of ultrashort laser melting of a copper film is studied by modified molecular dynamics method. A model considering the thermal conductivity of free electrons and the consumption of latent heat of melting is use...
The kinetics and microscopic mechanisms of ultrashort laser melting of a copper film is studied by modified molecular dynamics method. A model considering the thermal conductivity of free electrons and the consumption of latent heat of melting is use...
2008,
20.
Abstract:
Samples were excited by pulse laser and plasma was formed at atmospheric pressure. The technique of laser induced breakdown spectroscopy(LIBS) was applied to analyzing the carbon content in the samples. The matrix element Si was selected as internal ...
Samples were excited by pulse laser and plasma was formed at atmospheric pressure. The technique of laser induced breakdown spectroscopy(LIBS) was applied to analyzing the carbon content in the samples. The matrix element Si was selected as internal ...
2008,
20.
Abstract:
Using trimethylol propane triacrylate(TMPTA) as the initial material, low density TMPTA foam columns were successfully prepared by UV irradiation technique and freezing-drying process. These foam columns have the density range of 4 mg/cm3 to 20 mg/cm...
Using trimethylol propane triacrylate(TMPTA) as the initial material, low density TMPTA foam columns were successfully prepared by UV irradiation technique and freezing-drying process. These foam columns have the density range of 4 mg/cm3 to 20 mg/cm...
2008,
20.
Abstract:
The breakdown time delay and jitter are very important for the plasma-electrode Pockels cells(PEPC) electro-optic switch driven by one-pulse process. Their reduction is the key to improve the performance large aperture electro-optic switches. A metho...
The breakdown time delay and jitter are very important for the plasma-electrode Pockels cells(PEPC) electro-optic switch driven by one-pulse process. Their reduction is the key to improve the performance large aperture electro-optic switches. A metho...
2008,
20.
Abstract:
Based on the heat conductivity principles, a mathematic model about pulsed laser induced crystallization of a-Si thin film had been developed. With the finite difference method, the effect of varied parameters, such as wavelength and energy density o...
Based on the heat conductivity principles, a mathematic model about pulsed laser induced crystallization of a-Si thin film had been developed. With the finite difference method, the effect of varied parameters, such as wavelength and energy density o...
2008,
20.
Abstract:
Based on the technique of micro fluid injection molding, RF hollow microspheres were synthesized by using dibutyl phthalate as oil phase, RF solution as water phase, and by sol-gel, solvent exchanging and supercritical drying. The components, morphol...
Based on the technique of micro fluid injection molding, RF hollow microspheres were synthesized by using dibutyl phthalate as oil phase, RF solution as water phase, and by sol-gel, solvent exchanging and supercritical drying. The components, morphol...
2008,
20.
Abstract:
The CH coating on microshells was fabricated by low-pressure plasma chemical vapor deposition (LPPCVD) with a bounce pan system. The influence of bounce modes on the surface topography of the CH coating was discussed. The surface topography was probe...
The CH coating on microshells was fabricated by low-pressure plasma chemical vapor deposition (LPPCVD) with a bounce pan system. The influence of bounce modes on the surface topography of the CH coating was discussed. The surface topography was probe...
2008,
20.
Abstract:
A method of designing continuous phase plates(CPP) for beam smoothing has been studied. The new CPP was obtained through adding some procedures into the traditional GerchbergSaxton(G-S) algorithm that was giving a new way of initial phase, adding st...
A method of designing continuous phase plates(CPP) for beam smoothing has been studied. The new CPP was obtained through adding some procedures into the traditional GerchbergSaxton(G-S) algorithm that was giving a new way of initial phase, adding st...
2008,
20.
Abstract:
This article describes the laser Thomson scattering principle and the developed system on HL-2A device. The high power Q-switch Nd:YAG laser, with a wavelength of 1 064 nm, can sufficiently satisfy the measurement requirement. The polycromator consis...
This article describes the laser Thomson scattering principle and the developed system on HL-2A device. The high power Q-switch Nd:YAG laser, with a wavelength of 1 064 nm, can sufficiently satisfy the measurement requirement. The polycromator consis...
2008,
20.
Abstract:
In this paper, mesh pans for coating poly-olphe-methycstyrene(PAMS) microspheres with polymer are designed. The difference between bounces on a mesh pan and a glass pan is evaluated. The capability of mesh pans for bouncing PAMS microspheres is exami...
In this paper, mesh pans for coating poly-olphe-methycstyrene(PAMS) microspheres with polymer are designed. The difference between bounces on a mesh pan and a glass pan is evaluated. The capability of mesh pans for bouncing PAMS microspheres is exami...
2008,
20.
Abstract:
Structure stability is an important design index of ICF driver. Based on laser prototype facility(TIL) design characteristic of multi-pass amplifier and frame structure, the optical matrix is used to analyze the single optical element influence on th...
Structure stability is an important design index of ICF driver. Based on laser prototype facility(TIL) design characteristic of multi-pass amplifier and frame structure, the optical matrix is used to analyze the single optical element influence on th...
2008,
20.
Abstract:
A novel UWB horn antenna based on TEM horn structure with wedge-shaped dielectric-filling is investigated. For the wedge-shape dielectric-filling horn antenna, it is found that the radiation energy converged in the dielectric-filling region, thus the...
A novel UWB horn antenna based on TEM horn structure with wedge-shaped dielectric-filling is investigated. For the wedge-shape dielectric-filling horn antenna, it is found that the radiation energy converged in the dielectric-filling region, thus the...
2008,
20.
Abstract:
A system of high power centimeter wave(HPCW) was built up. The temperature change of tenebrio molitor and lawn was sampled during HPCW irradiation . It is shown that the relationship between the temperature increase of tenebrio molitor and irradiatio...
A system of high power centimeter wave(HPCW) was built up. The temperature change of tenebrio molitor and lawn was sampled during HPCW irradiation . It is shown that the relationship between the temperature increase of tenebrio molitor and irradiatio...
2008,
20.
Abstract:
A cylindrical waveguide filled with thin annular plasma is studied in a strong longitudinal magnetic field. The beam and the annular plasma have been considered as anisotropic dielectric. So the hot cavity dispersion equation can be derived on the ba...
A cylindrical waveguide filled with thin annular plasma is studied in a strong longitudinal magnetic field. The beam and the annular plasma have been considered as anisotropic dielectric. So the hot cavity dispersion equation can be derived on the ba...
2008,
20.
Abstract:
A great equal range microstrip power equalizer was studied and a kind of circuit topology was proposed. In the circuit, the parallel stub resonator was used to get bandstop effect, and the resistor was used to modify the attenuation character. Furth...
A great equal range microstrip power equalizer was studied and a kind of circuit topology was proposed. In the circuit, the parallel stub resonator was used to get bandstop effect, and the resistor was used to modify the attenuation character. Furth...
2008,
20.
Abstract:
The ADI-BOR-FDTD method can reduce a three-dimensional problem to a two-dimensional one, resulting in an efficient saving of CPU running time and memory requirement. By incorporating the plane wave expanding technique and total-field/scattered-field ...
The ADI-BOR-FDTD method can reduce a three-dimensional problem to a two-dimensional one, resulting in an efficient saving of CPU running time and memory requirement. By incorporating the plane wave expanding technique and total-field/scattered-field ...
2008,
20.
Abstract:
The connecting face of small loop probe is optimized with slope cutting, so that the probe can exactly measure weak coupling electromagnetic field in the cavities. Under the irradiation of electromagnetic pulse, the change of voltage in loop probe is...
The connecting face of small loop probe is optimized with slope cutting, so that the probe can exactly measure weak coupling electromagnetic field in the cavities. Under the irradiation of electromagnetic pulse, the change of voltage in loop probe is...
2008,
20.
Abstract:
This paper presents the criteria to judge the quality of electron-beam in designing the TWT’s electron gun by numerical simulation: uniform current density of cathode surface emission, good laminar flow property of the electron beam, uniform radial d...
This paper presents the criteria to judge the quality of electron-beam in designing the TWT’s electron gun by numerical simulation: uniform current density of cathode surface emission, good laminar flow property of the electron beam, uniform radial d...
2008,
20.
Abstract:
Based on a series of electromagnetic field equations which are in line with the boundary conditions, the eigenequation of coaxial waveguide with outer slotted structure is derived using the fields matching method. When the radius of the inner conduct...
Based on a series of electromagnetic field equations which are in line with the boundary conditions, the eigenequation of coaxial waveguide with outer slotted structure is derived using the fields matching method. When the radius of the inner conduct...
2008,
20.
Abstract:
The nonlinear consistent equations were put forward which could describe the beam-wave interaction in relativistic-backward-wave-oscillator(RBWO). The effects of different parameters on the peak superradiant-power of RBWO, such as accelerating voltag...
The nonlinear consistent equations were put forward which could describe the beam-wave interaction in relativistic-backward-wave-oscillator(RBWO). The effects of different parameters on the peak superradiant-power of RBWO, such as accelerating voltag...
2008,
20.
Abstract:
The structure of tri-bend circular waveguides was studied by theoretical calculation, theoretical design and numerical simulation. The TM01-TE11 conversion efficiency formula were derived and the condition for the highest conversion efficiency was ob...
The structure of tri-bend circular waveguides was studied by theoretical calculation, theoretical design and numerical simulation. The TM01-TE11 conversion efficiency formula were derived and the condition for the highest conversion efficiency was ob...
2008,
20.
Abstract:
The transient response of the high power PIN diode limiter to the step electromagnetic pulse descending edge is calculated by PSpice. Pulse-inversion is observed in the output of the high power PIN diode limiter while the limiter is affected by the s...
The transient response of the high power PIN diode limiter to the step electromagnetic pulse descending edge is calculated by PSpice. Pulse-inversion is observed in the output of the high power PIN diode limiter while the limiter is affected by the s...
2008,
20.
Abstract:
Based on theory of temperature field and thermal stress field around inclusions in KDP crystals, the distribution of crystal temperature field and thermal stress field is analyzed under the influence of micro-nano machined superficial layer’s inclusi...
Based on theory of temperature field and thermal stress field around inclusions in KDP crystals, the distribution of crystal temperature field and thermal stress field is analyzed under the influence of micro-nano machined superficial layer’s inclusi...
2008,
20.
Abstract:
Through Geant4 simulation, the characteristics of recoil proton in plastic scintillating fibers irradiated by high-energy neutrons have been presented. The energy and angular distributions of recoil proton have been analyzed with incident neutron ene...
Through Geant4 simulation, the characteristics of recoil proton in plastic scintillating fibers irradiated by high-energy neutrons have been presented. The energy and angular distributions of recoil proton have been analyzed with incident neutron ene...
2008,
20.
Abstract:
The metal particles of different elements, concentrations and diameters are doped in PVC and the targets are tested by using a high-power pulsed TEA-CO2 laser. The results show that: the coupling coefficient changes slightly with elements and diamete...
The metal particles of different elements, concentrations and diameters are doped in PVC and the targets are tested by using a high-power pulsed TEA-CO2 laser. The results show that: the coupling coefficient changes slightly with elements and diamete...
2008,
20.
Abstract:
The fabrication of LaB6 field emission arrays is the key technology for manufacturing LaB6 field emission cathodes. Silicon nitride film was deposited as mask layer on the (111) single crystal LaB6 substrate by plasma-enhanced chemical vapor depositi...
The fabrication of LaB6 field emission arrays is the key technology for manufacturing LaB6 field emission cathodes. Silicon nitride film was deposited as mask layer on the (111) single crystal LaB6 substrate by plasma-enhanced chemical vapor depositi...
2008,
20.
Abstract:
In order to investigate the blur caused by the container in proton radiography, the expression of blurring FWHM of the container was deduced on the base of the multiple Coulomb scattering and the characteristic of the lens imaging system. The results...
In order to investigate the blur caused by the container in proton radiography, the expression of blurring FWHM of the container was deduced on the base of the multiple Coulomb scattering and the characteristic of the lens imaging system. The results...
2008,
20.
Abstract:
Semi-analytical method , a new solution to calculate electromagnetic field, is applied to analyze three kinds of quadrupole field of shape-varied electrodes in electron optics. Positions of polar points can be determined precisely, simply and efficie...
Semi-analytical method , a new solution to calculate electromagnetic field, is applied to analyze three kinds of quadrupole field of shape-varied electrodes in electron optics. Positions of polar points can be determined precisely, simply and efficie...
2008,
20.
Abstract:
Ice cylinders are common in middle-latitude cirrostratus. Using wave theory for infinitely long cylinder irradiated by linearly polarized light, the intensity and polarization of scattering light by single ice cylinder are studied at different incide...
Ice cylinders are common in middle-latitude cirrostratus. Using wave theory for infinitely long cylinder irradiated by linearly polarized light, the intensity and polarization of scattering light by single ice cylinder are studied at different incide...
2008,
20.
Abstract:
The change in optical properties and the damage mechanism of ZnO/silicone white paint caused by low energy protons were investigated in terms of ground-based simulation testing. The results show that the solar absorptance ratio increases with the inc...
The change in optical properties and the damage mechanism of ZnO/silicone white paint caused by low energy protons were investigated in terms of ground-based simulation testing. The results show that the solar absorptance ratio increases with the inc...
2008,
20.
Abstract:
Two bracing type MV gas switches are designed, the cantilever switch has a cantilevered HV electrode sealed in the brace insulating cylinder, the section-brace switch has an HV electrode spreading out of the brace insulating cylinder. Through self-br...
Two bracing type MV gas switches are designed, the cantilever switch has a cantilevered HV electrode sealed in the brace insulating cylinder, the section-brace switch has an HV electrode spreading out of the brace insulating cylinder. Through self-br...
2008,
20.
Abstract:
Two D-dot monitors have been designed to measure the voltage pulse on a high-power triplate transmission line. One has been installed in the entrance and the other in the exit. A signal proportional to the time derivative of voltage is given from the...
Two D-dot monitors have been designed to measure the voltage pulse on a high-power triplate transmission line. One has been installed in the entrance and the other in the exit. A signal proportional to the time derivative of voltage is given from the...
2008,
20.
Abstract:
A high voltage pulse generator with fast rise-time and adjustable output waveform was developed. The new generator is mainly composed of five separate modules including Marx generator, pulse forming assembly, main switch, matching load and test cavit...
A high voltage pulse generator with fast rise-time and adjustable output waveform was developed. The new generator is mainly composed of five separate modules including Marx generator, pulse forming assembly, main switch, matching load and test cavit...
