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RSS2009 Vol. 21, No. 08
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2009,
21.
Abstract:
Theoretical analyses have been done on the cross correlation between pulses of the femtosecond laser sequence. Experimental results are also derived using a cross-correlation setup, which can be switched between intensity cross-correlation mode and i...
Theoretical analyses have been done on the cross correlation between pulses of the femtosecond laser sequence. Experimental results are also derived using a cross-correlation setup, which can be switched between intensity cross-correlation mode and i...
2009,
21.
Abstract:
By using the Compton scattering theory, the generation of picosecond pulses of terahertz radiation has been studied, including the photon yield and radiant power. The results show that picosecond pulses of terahertz radiation are expected to be produ...
By using the Compton scattering theory, the generation of picosecond pulses of terahertz radiation has been studied, including the photon yield and radiant power. The results show that picosecond pulses of terahertz radiation are expected to be produ...
2009,
21.
Abstract:
An optical limiter has been designed based on the step ring grating. The intensity distribution of a beam transmitting through the limiter was derived theoretically and simulated, and the changes rules of intensity distribution with grating indexes w...
An optical limiter has been designed based on the step ring grating. The intensity distribution of a beam transmitting through the limiter was derived theoretically and simulated, and the changes rules of intensity distribution with grating indexes w...
2009,
21.
Abstract:
The influence of the position of acoustic-optic Q-switch on the output pulse stability is analyzed by calculating the misalignment sensitivity of cavity mirrors. The theoretical results show placing the acoustic-optic Q-switch crystal near the output...
The influence of the position of acoustic-optic Q-switch on the output pulse stability is analyzed by calculating the misalignment sensitivity of cavity mirrors. The theoretical results show placing the acoustic-optic Q-switch crystal near the output...
2009,
21.
Abstract:
Wind lidar based on Fizeau interferometer is developed, two wind inversion algorithms are presented as well. The two wind inversion algorithms are analyzed respectively, the results show: when the wind is slow, the two algorithms have the same precis...
Wind lidar based on Fizeau interferometer is developed, two wind inversion algorithms are presented as well. The two wind inversion algorithms are analyzed respectively, the results show: when the wind is slow, the two algorithms have the same precis...
2009,
21.
Abstract:
An all-fiber supercontinuum generation system has been demonstrated. In the system, a short matching fiber was used to reduce the loss in the connection of the gain fibers and the photonic crystal fiber, and real-time measurement was carried out in t...
An all-fiber supercontinuum generation system has been demonstrated. In the system, a short matching fiber was used to reduce the loss in the connection of the gain fibers and the photonic crystal fiber, and real-time measurement was carried out in t...
2009,
21.
Abstract:
Based on the numerical modeling including stimulated Brillouin scattering and stimulated Raman scattering, the propagation-rate equations of ytterbium-doped double-clad fiber amplifiers are solved. The output characteristics of the high-power backwar...
Based on the numerical modeling including stimulated Brillouin scattering and stimulated Raman scattering, the propagation-rate equations of ytterbium-doped double-clad fiber amplifiers are solved. The output characteristics of the high-power backwar...
2009,
21.
Abstract:
Airborne molecular contaminations inside a high power laser facility are studied. Air samples of suspected locations are collected by special air-sampling facilities before and after laser launch. Extraction and concentration measurement of the main ...
Airborne molecular contaminations inside a high power laser facility are studied. Air samples of suspected locations are collected by special air-sampling facilities before and after laser launch. Extraction and concentration measurement of the main ...
2009,
21.
Abstract:
High frequencies beyond the cut-off frequency could pass through imaging systems after spectrum shifting, which is one of high resolution imaging technologies. The effect of this technology is obvious but difficult to achieve. To verify its feasibili...
High frequencies beyond the cut-off frequency could pass through imaging systems after spectrum shifting, which is one of high resolution imaging technologies. The effect of this technology is obvious but difficult to achieve. To verify its feasibili...
2009,
21.
Abstract:
Stimulated emission has been observed from porous silicon formed by irradiation and annealing when optically excited by a 514 nm laser. When the excitation intensity exceeded a threshold, very sharp peaks emerged in the emission spectra from 650～750 ...
Stimulated emission has been observed from porous silicon formed by irradiation and annealing when optically excited by a 514 nm laser. When the excitation intensity exceeded a threshold, very sharp peaks emerged in the emission spectra from 650～750 ...
2009,
21.
Abstract:
Energy exchange efficiency of clustering electron beams passing through a cylindrical coaxial TM812 mode cavity resonator is studied, as well as the extraction method of microwave energy from the cavity resonator. The feasibility of the cavity resona...
Energy exchange efficiency of clustering electron beams passing through a cylindrical coaxial TM812 mode cavity resonator is studied, as well as the extraction method of microwave energy from the cavity resonator. The feasibility of the cavity resona...
2009,
21.
Abstract:
This article has put forward a numerical method which could compute dispersion curves in an arbitrary coaxial periodic slow-wave structure, based on field-matching method and Fourier series theory. This numerical method has strong universality and ex...
This article has put forward a numerical method which could compute dispersion curves in an arbitrary coaxial periodic slow-wave structure, based on field-matching method and Fourier series theory. This numerical method has strong universality and ex...
2009,
21.
Abstract:
According to the electromagnetic theory, permeating depth of the 2 450 MHz microwave in homogeneous media is analyzed. A nonlinear heat transfer model is applied to predict the temperature variation in biotissues under the microwave irradiation. Base...
According to the electromagnetic theory, permeating depth of the 2 450 MHz microwave in homogeneous media is analyzed. A nonlinear heat transfer model is applied to predict the temperature variation in biotissues under the microwave irradiation. Base...
2009,
21.
Abstract:
Based on the mode coupling theory,the built in TE03-TE02-TE01 mode converter of the 3 mm band second-harmonic complex cavity gyrotron is studied. Adopting the structure of corrugated waveguide with tapered radius and different phase rematch technique...
Based on the mode coupling theory,the built in TE03-TE02-TE01 mode converter of the 3 mm band second-harmonic complex cavity gyrotron is studied. Adopting the structure of corrugated waveguide with tapered radius and different phase rematch technique...
2009,
21.
Abstract:
The propagation characteristic in mixture atmosphere of high power microwave is presented based on atmosphere polarization intensity superposition. By deducing dielectric constant of mixture atmosphere, the refractive index and attenuation coefficien...
The propagation characteristic in mixture atmosphere of high power microwave is presented based on atmosphere polarization intensity superposition. By deducing dielectric constant of mixture atmosphere, the refractive index and attenuation coefficien...
2009,
21.
Abstract:
With three-dimensional particle simulation software, a new type of 18 vane 5.8 GHz magnetron has been simulated. The differences between explosive emission and beam emission are compared. Using beam emission models, the influence to the magnetron cha...
With three-dimensional particle simulation software, a new type of 18 vane 5.8 GHz magnetron has been simulated. The differences between explosive emission and beam emission are compared. Using beam emission models, the influence to the magnetron cha...
2009,
21.
Abstract:
The propagation of the high power electromagnetic pulse has been numerically simulated in the whole ionosphere. Using the shortened ionosphere profile, the equations of high power electromagnetic pulse propagating in the cold plasma could describe th...
The propagation of the high power electromagnetic pulse has been numerically simulated in the whole ionosphere. Using the shortened ionosphere profile, the equations of high power electromagnetic pulse propagating in the cold plasma could describe th...
2009,
21.
Abstract:
A method of radar cross section(RCS) reduction of microstrip printed dipole antenna with a uniplanar compact-EBG(UC-EBG) ground plane is proposed. Owing to its stop-band property, the proposed UC-EBG can be used as the ground plane of a microstrip pr...
A method of radar cross section(RCS) reduction of microstrip printed dipole antenna with a uniplanar compact-EBG(UC-EBG) ground plane is proposed. Owing to its stop-band property, the proposed UC-EBG can be used as the ground plane of a microstrip pr...
2009,
21.
Abstract:
The diffractive optical element is one of the main solutions to achieve uniform illumination, which is achieved through the pure phase element. There are sub-diffraction spots because of the discontinuity of pure phase element, which makes the beam l...
The diffractive optical element is one of the main solutions to achieve uniform illumination, which is achieved through the pure phase element. There are sub-diffraction spots because of the discontinuity of pure phase element, which makes the beam l...
2009,
21.
Abstract:
The paper presents a kind of researching PCM of gallium-based alloy material with high heat conductance, low volume variation rate in solid-to-liquid phase and low linear expansion coefficients. In the laboratory the actual conditions are simulated t...
The paper presents a kind of researching PCM of gallium-based alloy material with high heat conductance, low volume variation rate in solid-to-liquid phase and low linear expansion coefficients. In the laboratory the actual conditions are simulated t...
2009,
21.
Abstract:
The spatial pattern and spectrum of transition radiation have been measured at the normal direction from the rear surfaces of targets, employing an optical CCD camera and an OMA optical multichannel spectrometer on the 100 TW femtosecond laser facil...
The spatial pattern and spectrum of transition radiation have been measured at the normal direction from the rear surfaces of targets, employing an optical CCD camera and an OMA optical multichannel spectrometer on the 100 TW femtosecond laser facil...
2009,
21.
Abstract:
A synthesis procedure of ZrO2 colloids derived from the acid-alkali two-step catalyzed hydrolysis was disclosed. The granularity and its distribution of the colloid particles were measured.Then a ZrO2 film was prepared by the spin-coating method on K...
A synthesis procedure of ZrO2 colloids derived from the acid-alkali two-step catalyzed hydrolysis was disclosed. The granularity and its distribution of the colloid particles were measured.Then a ZrO2 film was prepared by the spin-coating method on K...
2009,
21.
Abstract:
Based on small-signal gain formula and Fresnel reflection formula, the parasitic amplified cavities of two high power laser facilities are studied. The two facilities, facility A and facility B, have similar configuration of beam path and parasitic a...
Based on small-signal gain formula and Fresnel reflection formula, the parasitic amplified cavities of two high power laser facilities are studied. The two facilities, facility A and facility B, have similar configuration of beam path and parasitic a...
2009,
21.
Abstract:
Based on the collisional radiative model from the flexible atomic code, X-ray emission spectra for L-shell of Li-like oxygen plasma consisting of three kinds of oxygen ions (Li-like oxygen ion and another two neighboring ions) are simulated. Atomic p...
Based on the collisional radiative model from the flexible atomic code, X-ray emission spectra for L-shell of Li-like oxygen plasma consisting of three kinds of oxygen ions (Li-like oxygen ion and another two neighboring ions) are simulated. Atomic p...
2009,
21.
Abstract:
Molar concentration ratios of citric acid to Ca2+ affect properties of CaMnO3 powders. In this paper, CaMnO3 gel was prepared through the sol-gel method with deionized water and ethylene glycol as solvent, different ratios of citric acid as chelate, ...
Molar concentration ratios of citric acid to Ca2+ affect properties of CaMnO3 powders. In this paper, CaMnO3 gel was prepared through the sol-gel method with deionized water and ethylene glycol as solvent, different ratios of citric acid as chelate, ...
2009,
21.
Abstract:
In this paper a full density matrix treatment is adopted to deal with the interaction between long-pulse, circularly-polarized light and the sodium atoms. The time evolution curve of each of the 24 sub-state’s population probability can be obtained b...
In this paper a full density matrix treatment is adopted to deal with the interaction between long-pulse, circularly-polarized light and the sodium atoms. The time evolution curve of each of the 24 sub-state’s population probability can be obtained b...
2009,
21.
Abstract:
The field-pattern of various defect modes in the coaxial photonic crystal microcavity has been simulated using the numerical calculation method. The quality factor (Q-factor) and power loss of the microcavity have been calculated and the effect of ge...
The field-pattern of various defect modes in the coaxial photonic crystal microcavity has been simulated using the numerical calculation method. The quality factor (Q-factor) and power loss of the microcavity have been calculated and the effect of ge...
2009,
21.
Abstract:
Solid-state modulators based on power MOSFETs are promising pulsed power sources in producing high-voltage fast pulses with the pulse width agility in megahertz repetition rate. A solid-state modulator with 9 modules, each with 6 power MOSFETs in par...
Solid-state modulators based on power MOSFETs are promising pulsed power sources in producing high-voltage fast pulses with the pulse width agility in megahertz repetition rate. A solid-state modulator with 9 modules, each with 6 power MOSFETs in par...
2009,
21.
Abstract:
A UV illuminated switch of three sections in series was designed based on UV illumination technology and capacitance-resistance coupling circuit. The switch consists of UV illumination gap and self-breakdown gaps. The distance of self-breakdown gap w...
A UV illuminated switch of three sections in series was designed based on UV illumination technology and capacitance-resistance coupling circuit. The switch consists of UV illumination gap and self-breakdown gaps. The distance of self-breakdown gap w...
2009,
21.
Abstract:
A compact 40 kW/10 kV digital control constant-current capacitor charging power supply(CCPS )has been developed based on the series resonance and high frequency inverter technologies. The logical design of resonant parameters and the high frequency h...
A compact 40 kW/10 kV digital control constant-current capacitor charging power supply(CCPS )has been developed based on the series resonance and high frequency inverter technologies. The logical design of resonant parameters and the high frequency h...
2009,
21.
Abstract:
The design of the fast kicker prototype magnet for China Spallation Neutron Source(CSNS) rapid cycling synchronous(RCS) extraction has been introduced. Single-turn structure of SNS in U.S. was adopted for magnet power supply research difficulties and...
The design of the fast kicker prototype magnet for China Spallation Neutron Source(CSNS) rapid cycling synchronous(RCS) extraction has been introduced. Single-turn structure of SNS in U.S. was adopted for magnet power supply research difficulties and...
2009,
21.
Abstract:
With nanosecond voltage pulses produced by a fast Marx generator, breakdown experiments of gas switches under a number of pulse voltages have been carried out. Corresponding breakdown voltage，breakdown delay and jitter were acquired for the switches ...
With nanosecond voltage pulses produced by a fast Marx generator, breakdown experiments of gas switches under a number of pulse voltages have been carried out. Corresponding breakdown voltage，breakdown delay and jitter were acquired for the switches ...
2009,
21.
Abstract:
The metallized film capacitor is one of the most important components of the inertial confinement fusion(ICF) facility. The reliability of the capacitor greatly influences the reliability and operational cost of the whole facility. Based on the analy...
The metallized film capacitor is one of the most important components of the inertial confinement fusion(ICF) facility. The reliability of the capacitor greatly influences the reliability and operational cost of the whole facility. Based on the analy...
2009,
21.
Abstract:
The broadening of excimer laser pulses during amplification was analysed. To attain a shorter laser pulse, a compressing technique called pulse negative feedback was developed with the gain saturation switch applied to the amplification in an dischar...
The broadening of excimer laser pulses during amplification was analysed. To attain a shorter laser pulse, a compressing technique called pulse negative feedback was developed with the gain saturation switch applied to the amplification in an dischar...
