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RSS2009 Vol. 21, No. 05
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2009,
21.
Abstract:
The so-called beacon difficulty in adaptive optics can be partly overcome by applying laser guide star subsystem. The simplified calculation model for spatial power spectra of main error in a laser guide star adaptive optics system is presented. Comp...
The so-called beacon difficulty in adaptive optics can be partly overcome by applying laser guide star subsystem. The simplified calculation model for spatial power spectra of main error in a laser guide star adaptive optics system is presented. Comp...
2009,
21.
Abstract:
A lens and a paraboloid nozzle were used to focus pulsed CO2 laser and generate impulse. Effects of single pulse energy on impulse coupling coefficient was studied with a highaccuracy compound pendulum and a light figure system. Extension range of p...
A lens and a paraboloid nozzle were used to focus pulsed CO2 laser and generate impulse. Effects of single pulse energy on impulse coupling coefficient was studied with a highaccuracy compound pendulum and a light figure system. Extension range of p...
2009,
21.
Abstract:
The convergence rate can be the limit of adaptive optics without a wave-front sensor in real-time applications. An improvement on the convergence rate of the stochastic parallel gradient descent(SPGD) algorithm is discussed by combing modal method wi...
The convergence rate can be the limit of adaptive optics without a wave-front sensor in real-time applications. An improvement on the convergence rate of the stochastic parallel gradient descent(SPGD) algorithm is discussed by combing modal method wi...
2009,
21.
Abstract:
In order to increase the wear life of 40Cr steel, preset laser cladding techniques were adopted with Fe-based alloy powders which were obtained on the 40Cr steel substrate. Wear tests were carried out with HT-500 wear tester to determine the rule of ...
In order to increase the wear life of 40Cr steel, preset laser cladding techniques were adopted with Fe-based alloy powders which were obtained on the 40Cr steel substrate. Wear tests were carried out with HT-500 wear tester to determine the rule of ...
2009,
21.
Abstract:
In this paper, the purpose of output pulsed laser with high-power and high beam quality is discussed, and the structure of unsymmetrical plane-concave resonator is analyzed theoretically. We have completed the laser, which could output high-power and...
In this paper, the purpose of output pulsed laser with high-power and high beam quality is discussed, and the structure of unsymmetrical plane-concave resonator is analyzed theoretically. We have completed the laser, which could output high-power and...
2009,
21.
Abstract:
Eddy-covariance and profile measurements over snow were carried out at the 35 m tower in Hefei from Jan 28, 2008 to Feb 1, 2008. A similarity function was presented for the stable atmospheric stratification, and then refractive index structure parame...
Eddy-covariance and profile measurements over snow were carried out at the 35 m tower in Hefei from Jan 28, 2008 to Feb 1, 2008. A similarity function was presented for the stable atmospheric stratification, and then refractive index structure parame...
2009,
21.
Abstract:
The interrelation between the temperature difference of the deuterium and tritium(DT) outer surface and roughness of the DT layer has been obtained in theory for the indirect drive targets of inertial confinement fusion. Taking the Laser Magajoule(LM...
The interrelation between the temperature difference of the deuterium and tritium(DT) outer surface and roughness of the DT layer has been obtained in theory for the indirect drive targets of inertial confinement fusion. Taking the Laser Magajoule(LM...
2009,
21.
Abstract:
A triple-orifice droplet generator was designed and developed for the size-controllable continuous fabrication of hollow foam micro-shells. Solutions of an internal water phase, an oil phase (trimethylpropane triacrylate monomer, dibutyl phthalate so...
A triple-orifice droplet generator was designed and developed for the size-controllable continuous fabrication of hollow foam micro-shells. Solutions of an internal water phase, an oil phase (trimethylpropane triacrylate monomer, dibutyl phthalate so...
2009,
21.
Abstract:
An electron optics model of axial symmetric cylinder is adopted, three-dimensional and two-dimensional model are established based on this model. The traces of electron beam are calculated, and image location is also obtained. The influences of the e...
An electron optics model of axial symmetric cylinder is adopted, three-dimensional and two-dimensional model are established based on this model. The traces of electron beam are calculated, and image location is also obtained. The influences of the e...
2009,
21.
Abstract:
The plasma temperature is an important factor in quantitative analysis by laser-induced breakdown spectroscopy(LIBS). The plasmas were generated by a Nd:YAG laser on the surface of sample and detected by an Echelle spectrograph and an Intensified Cha...
The plasma temperature is an important factor in quantitative analysis by laser-induced breakdown spectroscopy(LIBS). The plasmas were generated by a Nd:YAG laser on the surface of sample and detected by an Echelle spectrograph and an Intensified Cha...
2009,
21.
Abstract:
The result of full-screen sweeping rates of streak camera(SC) is obtained using a nonlinear-least-squares method. The uncertainty of this method is about 0.04%, far below SC’s systematic uncertainty. Full-screen result eliminates nonlinearity and spa...
The result of full-screen sweeping rates of streak camera(SC) is obtained using a nonlinear-least-squares method. The uncertainty of this method is about 0.04%, far below SC’s systematic uncertainty. Full-screen result eliminates nonlinearity and spa...
2009,
21.
Abstract:
A microchannel plate gated X-ray framing camera(XFC) was used to take pictures of Au plasma radial convergence in hohlraums on Shenguang-Ⅱ laser facility. According to XFC image manipulation by MATLAB and measurement of radiation temperature, hohlrau...
A microchannel plate gated X-ray framing camera(XFC) was used to take pictures of Au plasma radial convergence in hohlraums on Shenguang-Ⅱ laser facility. According to XFC image manipulation by MATLAB and measurement of radiation temperature, hohlrau...
2009,
21.
Abstract:
The theoretic model of framing camera’s gain attenuation is analyzed. The exponential attenuation curve of the gain along the pulse propagation time is simulated. An experiment to measure the coefficient of gain attenuation based on the gain attenuat...
The theoretic model of framing camera’s gain attenuation is analyzed. The exponential attenuation curve of the gain along the pulse propagation time is simulated. An experiment to measure the coefficient of gain attenuation based on the gain attenuat...
2009,
21.
Abstract:
The data processing procedure for imaging Velocity Interferometer System for Any Reflector(VISAR) has been listed with Fourier transform method. Fringe loss problem in shock wave experiment with imaging VISAR technique has been researched. The fringe...
The data processing procedure for imaging Velocity Interferometer System for Any Reflector(VISAR) has been listed with Fourier transform method. Fringe loss problem in shock wave experiment with imaging VISAR technique has been researched. The fringe...
2009,
21.
Abstract:
Radiation temperature could be quantified in indirect-drive ICF experiments. This paper introduces a new method for calculating radiation temperature without unfolding. It is a simple method which can provide the real time temperature. Radiation temp...
Radiation temperature could be quantified in indirect-drive ICF experiments. This paper introduces a new method for calculating radiation temperature without unfolding. It is a simple method which can provide the real time temperature. Radiation temp...
2009,
21.
Abstract:
The interaction of the plane voltage wave with a pair of 2-D inductor loaded and capacitor loaded transmission line metamaterial slabs is analysed. Under the conjugate matched condition, the voltage distributions inside and outside such paired slabs ...
The interaction of the plane voltage wave with a pair of 2-D inductor loaded and capacitor loaded transmission line metamaterial slabs is analysed. Under the conjugate matched condition, the voltage distributions inside and outside such paired slabs ...
2009,
21.
Abstract:
The equations of piecewise linear recursive convolution(PLRC) using finitedifference time-domain(FDTD) method for negativerefractive index materials are presented. The PLRCFDTD method is used to simulate the interaction of electromagnetic wave with...
The equations of piecewise linear recursive convolution(PLRC) using finitedifference time-domain(FDTD) method for negativerefractive index materials are presented. The PLRCFDTD method is used to simulate the interaction of electromagnetic wave with...
2009,
21.
Abstract:
Combing Maxwell equations and electron liquid equations, air ionization and breakdown caused by high power microwave(HPM) are analyzed using FDTD method. Comparing with the traditional approximate analysis, this method uses instantaneous electric fie...
Combing Maxwell equations and electron liquid equations, air ionization and breakdown caused by high power microwave(HPM) are analyzed using FDTD method. Comparing with the traditional approximate analysis, this method uses instantaneous electric fie...
2009,
21.
Abstract:
Physical and mathematical models of the magnetron injection gun(MIG) were constructed, and a code for MIG’s calculation was developed. A double anode magnetron injection gun for gyro-TWT amplifier working at 35 GHz, 70 kV and 10 A was designed and si...
Physical and mathematical models of the magnetron injection gun(MIG) were constructed, and a code for MIG’s calculation was developed. A double anode magnetron injection gun for gyro-TWT amplifier working at 35 GHz, 70 kV and 10 A was designed and si...
2009,
21.
Abstract:
Elliptical helical antennas are more suitable for satellite communications than traditional cylindrical helical antennas, whereas the circular polarization performance deteriorates, which restricts their wide applications. Two methods of improving ra...
Elliptical helical antennas are more suitable for satellite communications than traditional cylindrical helical antennas, whereas the circular polarization performance deteriorates, which restricts their wide applications. Two methods of improving ra...
2009,
21.
Abstract:
Based on the phase measurement principle of RF signals, the method of S-band relativistic klystron amplifier(RKA) phase measurement was put forward. The experiment of the 800 kW S-band RKA was performed and the phase measurement of S-band RKA was tes...
Based on the phase measurement principle of RF signals, the method of S-band relativistic klystron amplifier(RKA) phase measurement was put forward. The experiment of the 800 kW S-band RKA was performed and the phase measurement of S-band RKA was tes...
2009,
21.
Abstract:
Transient radiation response on CMOS circuits were investigated for different pulse widths. CMOS circuits 4007, 4069 and 6264 were irradiated using “Qiangguang-I” accelerator source. Latchup thresholds of CMOS inverters and upset level of CMOS SRAM w...
Transient radiation response on CMOS circuits were investigated for different pulse widths. CMOS circuits 4007, 4069 and 6264 were irradiated using “Qiangguang-I” accelerator source. Latchup thresholds of CMOS inverters and upset level of CMOS SRAM w...
2009,
21.
Abstract:
The BEPCⅡ is a double-ring collider with high current(0.91 A) and lots of,which had bunches(93 bunches). In order to inhibit the longitudinal oscillation (0-mode), a 0-mode beam feedback system was used never been used at the storage ring of the BEPC...
The BEPCⅡ is a double-ring collider with high current(0.91 A) and lots of,which had bunches(93 bunches). In order to inhibit the longitudinal oscillation (0-mode), a 0-mode beam feedback system was used never been used at the storage ring of the BEPC...
2009,
21.
Abstract:
Based on the detailed investigation in field programmable gate array(FPGA) radiation effects theory, a measurement system for radiation effects on static random access memory(SRAM)-based FPGA was developed. The testing principle of internal memory, f...
Based on the detailed investigation in field programmable gate array(FPGA) radiation effects theory, a measurement system for radiation effects on static random access memory(SRAM)-based FPGA was developed. The testing principle of internal memory, f...
2009,
21.
Abstract:
Temporal resolution of a soft X-ray picoseconds framing camera(XPFC) based on gated micro-channel plate (MCP) depends strong-nonlinearly on parameters of gating pulse (width, amplitude) and is much shorter than the gating pulse width, which the so-ca...
Temporal resolution of a soft X-ray picoseconds framing camera(XPFC) based on gated micro-channel plate (MCP) depends strong-nonlinearly on parameters of gating pulse (width, amplitude) and is much shorter than the gating pulse width, which the so-ca...
2009,
21.
Abstract:
Lots of attentions have been paid to spatial distribution, temporal profile, as well as spectrum reshapings in the design of kilojoule petawatt chirped pulse amplification(CPA) systems. The multilayer dielectric thin film reflector fabricated by top-...
Lots of attentions have been paid to spatial distribution, temporal profile, as well as spectrum reshapings in the design of kilojoule petawatt chirped pulse amplification(CPA) systems. The multilayer dielectric thin film reflector fabricated by top-...
2009,
21.
Abstract:
Numerical calculating on the defect mode in the one-dimensional (1-D) photonic crystal by the optical transmission matrix method was studied. We calculated and analyzed the relationship between refractive index of the defect layer and wavelength of t...
Numerical calculating on the defect mode in the one-dimensional (1-D) photonic crystal by the optical transmission matrix method was studied. We calculated and analyzed the relationship between refractive index of the defect layer and wavelength of t...
2009,
21.
Abstract:
quantum dot SiO2 stabilized SnO2 quantum dot were prepared by sol-gel-hydrothermal process. Then SnO2 quantum dot thin films were obtained by spin-coating with preprocess of well dispersing SnO2 quantum dots in SiO2 sol. The as-prepared SnO2 quantum ...
quantum dot SiO2 stabilized SnO2 quantum dot were prepared by sol-gel-hydrothermal process. Then SnO2 quantum dot thin films were obtained by spin-coating with preprocess of well dispersing SnO2 quantum dots in SiO2 sol. The as-prepared SnO2 quantum ...
2009,
21.
Abstract:
Optical properties of N-doped anatase TiO2 films prepared by N ion implantation have been studied. At first, TiO2 films were prepared by RF magnetron sputtering at different substrate temperatures. Then N ion implantations in the films were conducted...
Optical properties of N-doped anatase TiO2 films prepared by N ion implantation have been studied. At first, TiO2 films were prepared by RF magnetron sputtering at different substrate temperatures. Then N ion implantations in the films were conducted...
2009,
21.
Abstract:
According to the mean roughness and semisphere reflectivity of the gold plated polyester film surfaces, and based on the Kirchhoff’s approximation along with the pulse scattering mutual coherence function(MCF), we computed the double frequency scatt...
According to the mean roughness and semisphere reflectivity of the gold plated polyester film surfaces, and based on the Kirchhoff’s approximation along with the pulse scattering mutual coherence function(MCF), we computed the double frequency scatt...
2009,
21.
Abstract:
A photoconductive semiconductor switch(PCSS) with a gap of 20 mm was fabricated from semi-insulating GaAs. Triggered by a laser pulse with an incident optical energy of 9.9 mJ and a wavelength of 1 064 nm, photoconductivity tests of the PCSS were per...
A photoconductive semiconductor switch(PCSS) with a gap of 20 mm was fabricated from semi-insulating GaAs. Triggered by a laser pulse with an incident optical energy of 9.9 mJ and a wavelength of 1 064 nm, photoconductivity tests of the PCSS were per...
2009,
21.
Abstract:
Studying optical characteristics in the course of flashover in transformer oil is an effective way to explore breakdown mechanism of transformer oil. Optical signals were irregular pulses of 2~4 ns pulse-width and 30~50 mV amplitude at the pre-flasho...
Studying optical characteristics in the course of flashover in transformer oil is an effective way to explore breakdown mechanism of transformer oil. Optical signals were irregular pulses of 2~4 ns pulse-width and 30~50 mV amplitude at the pre-flasho...
Electromagnetic-field model for formation process of magnetic insulation without space-electron loss
2009,
21.
Abstract:
Through analyses on the exchange between the space-electron kinetic energy and interelectrode electromagnetic-field energy, and energy changes of the electromagnetic field on the magnetically insulated transmission line(MITL) cross-section, the quant...
Through analyses on the exchange between the space-electron kinetic energy and interelectrode electromagnetic-field energy, and energy changes of the electromagnetic field on the magnetically insulated transmission line(MITL) cross-section, the quant...
2009,
21.
Abstract:
A convoluted strip pulse forming line with zero thickness trace has been designed, which is all-solid and has low characteristic impedance. Through conformal mapping, the calculation method of its characteristic impedance the impedance is derived by ...
A convoluted strip pulse forming line with zero thickness trace has been designed, which is all-solid and has low characteristic impedance. Through conformal mapping, the calculation method of its characteristic impedance the impedance is derived by ...
