Email alert
RSS2010 Vol. 22, No. 06
Recommend Articles
Display Method:
2010,
22.
Abstract:
The centered-difference, time-biased and FDTD algorithms in particle-in-cell (PIC) simulation are studied and the stability conditions of these algorithms are given. The high-frequency noise filtering characters of time-biased and high quality algori...
The centered-difference, time-biased and FDTD algorithms in particle-in-cell (PIC) simulation are studied and the stability conditions of these algorithms are given. The high-frequency noise filtering characters of time-biased and high quality algori...
2010,
22.
Abstract:
Guiding magnetic fields are necessary for some high-power microwave (HPM) sources, and the usual way to generate them is to apply capacitor discharge to solenoids. In the paper, a power source using the pulse width modulation(PMW) technique is design...
Guiding magnetic fields are necessary for some high-power microwave (HPM) sources, and the usual way to generate them is to apply capacitor discharge to solenoids. In the paper, a power source using the pulse width modulation(PMW) technique is design...
2010,
22.
Abstract:
An over-moded coaxial relativistic backward-wave oscillator was presented. Its interaction zone is composed of rippled slow wave structures with two different periods. In the help of the software MAGIC, three stable frequency microwave output was obt...
An over-moded coaxial relativistic backward-wave oscillator was presented. Its interaction zone is composed of rippled slow wave structures with two different periods. In the help of the software MAGIC, three stable frequency microwave output was obt...
2010,
22.
Abstract:
Analysis of bend waveguides shows that a small curvature-radius bend waveguide and a mitered-joint waveguide that have equal bend angles and equivalent axial lengths have similar transmission characteristics. Therefore, a new kind of TM01-TE11 11 mod...
Analysis of bend waveguides shows that a small curvature-radius bend waveguide and a mitered-joint waveguide that have equal bend angles and equivalent axial lengths have similar transmission characteristics. Therefore, a new kind of TM01-TE11 11 mod...
2010,
22.
Abstract:
The near field properties of circular aperture antennas with Gaussian amplitude distribution are analyzed by the aperture field integration method in this paper. The axial near field and gain expressions of the unfocused and focused circular aperture...
The near field properties of circular aperture antennas with Gaussian amplitude distribution are analyzed by the aperture field integration method in this paper. The axial near field and gain expressions of the unfocused and focused circular aperture...
2010,
22.
Abstract:
In the study of anti-HPM reinforcement of analog integrated-circuits, the damage mechanism of a single BJT in the tested ICs is researched first. The research is composed of effect experiments and failure analysis, in order to get the damage mechanis...
In the study of anti-HPM reinforcement of analog integrated-circuits, the damage mechanism of a single BJT in the tested ICs is researched first. The research is composed of effect experiments and failure analysis, in order to get the damage mechanis...
2010,
22.
Abstract:
The planar zone plate,light weight, low loss and low cost with simple design, has been extensively studied and used at microwave and millimeterwave frequencies. However, the attenuation in conventional lowloss materials increases at higher frequenc...
The planar zone plate,light weight, low loss and low cost with simple design, has been extensively studied and used at microwave and millimeterwave frequencies. However, the attenuation in conventional lowloss materials increases at higher frequenc...
2010,
22.
Abstract:
In this paper, space-charge field distribution of elliptical sheet beam is derived. Then its Diocotron instability is observed using 3D PIC program. After that, transmission characteristics of the elliptical sheet beam transporting in periodical cusp...
In this paper, space-charge field distribution of elliptical sheet beam is derived. Then its Diocotron instability is observed using 3D PIC program. After that, transmission characteristics of the elliptical sheet beam transporting in periodical cusp...
2010,
22.
Abstract:
The ultra fast neutron detector is the key device in ICF fusion reactionrate measure system. The performance of the ultra fast neutron scintillator BC-422 was simulated using Geant4 code system. The detection efficiency, temporal resolution and sign...
The ultra fast neutron detector is the key device in ICF fusion reactionrate measure system. The performance of the ultra fast neutron scintillator BC-422 was simulated using Geant4 code system. The detection efficiency, temporal resolution and sign...
2010,
22.
Abstract:
In the first run of the large laser prototype facility, two sensitive plastic scintillation detectors were used to measure the primary neutron yield and the secondary neutron yield in the implosion experiments. When the primary neutron yield exceeded...
In the first run of the large laser prototype facility, two sensitive plastic scintillation detectors were used to measure the primary neutron yield and the secondary neutron yield in the implosion experiments. When the primary neutron yield exceeded...
2010,
22.
Abstract:
Nickel/titanium multilayers with different period of 10, 30, 50 and 75 were fabricated by DC magnetron sputtering. Grazing incidence X-ray measured reflectivity was used to characterize the interfacial roughness of the multilayers. To study the evolu...
Nickel/titanium multilayers with different period of 10, 30, 50 and 75 were fabricated by DC magnetron sputtering. Grazing incidence X-ray measured reflectivity was used to characterize the interfacial roughness of the multilayers. To study the evolu...
2010,
22.
Abstract:
The current-voltage characteristic of hydrogen plasmas induced by helicon waves was measured in situ by a Langmuir probe under low pressure. According to Druyvesteyn method, raw data were fitted by an exponential transformation to a tangent hyperboli...
The current-voltage characteristic of hydrogen plasmas induced by helicon waves was measured in situ by a Langmuir probe under low pressure. According to Druyvesteyn method, raw data were fitted by an exponential transformation to a tangent hyperboli...
2010,
22.
Abstract:
The vacuum-gap discharge damage of micro-channel plate(MCP) imagers based on two screen-electrode structures, with Al-screen and indium-tin-oxide(ITO) screen respectively, is investigated after first arcing. The results show that the erosion pattern ...
The vacuum-gap discharge damage of micro-channel plate(MCP) imagers based on two screen-electrode structures, with Al-screen and indium-tin-oxide(ITO) screen respectively, is investigated after first arcing. The results show that the erosion pattern ...
2010,
22.
Abstract:
Amorphous hydrogenated carbon films were prepared by pulsed laser deposition(PLD) and the effect of the hydrogen pressure upon the performance of the films was studied. The AFM and Wyko images of the film show that the surfaces of the films are smoot...
Amorphous hydrogenated carbon films were prepared by pulsed laser deposition(PLD) and the effect of the hydrogen pressure upon the performance of the films was studied. The AFM and Wyko images of the film show that the surfaces of the films are smoot...
2010,
22.
Abstract:
Based on the polyimino ketone(PIKs), low density microporous foams were successfully prepared with the dioxane solvent by the general freezing-dry technology. In order to analyze the relationship between polymer concentration and foam density, a seri...
Based on the polyimino ketone(PIKs), low density microporous foams were successfully prepared with the dioxane solvent by the general freezing-dry technology. In order to analyze the relationship between polymer concentration and foam density, a seri...
2010,
22.
Abstract:
SiO2 colloidal crystals were fabricated by vertical deposition and spin coating methods, and their appearance morphology, microstructure and photonic band-gap properties were compared. The used colloidal SiO2 spheres were synthesized by improved Stob...
SiO2 colloidal crystals were fabricated by vertical deposition and spin coating methods, and their appearance morphology, microstructure and photonic band-gap properties were compared. The used colloidal SiO2 spheres were synthesized by improved Stob...
2010,
22.
Abstract:
Spectral responses of aluminum- and gold-cathode X-ray diodes, commonly used in Z-pinch experiments of Qiangguang-I generator, have been calibrated on the 4B7B beamline of Beijing Synchrotron Radiation Facility, with a spectral range of 2.1 to 5.9 ke...
Spectral responses of aluminum- and gold-cathode X-ray diodes, commonly used in Z-pinch experiments of Qiangguang-I generator, have been calibrated on the 4B7B beamline of Beijing Synchrotron Radiation Facility, with a spectral range of 2.1 to 5.9 ke...
2010,
22.
Abstract:
The diagnostic instrument manipulator(DIM) is designed for the instruments pointing and positioning in inertial confinement fusion (ICF) experiment. The DIM is a hybrid manipulator and provides precision 2-rotation and 1-translation capability for po...
The diagnostic instrument manipulator(DIM) is designed for the instruments pointing and positioning in inertial confinement fusion (ICF) experiment. The DIM is a hybrid manipulator and provides precision 2-rotation and 1-translation capability for po...
2010,
22.
Abstract:
The attenuation coefficient of electric thruster plasma jet for communication signals was calculated with time-domain finite-difference method. And the attenuation effect on C-band electromagnetic wave propagating through microwave plasma thruster je...
The attenuation coefficient of electric thruster plasma jet for communication signals was calculated with time-domain finite-difference method. And the attenuation effect on C-band electromagnetic wave propagating through microwave plasma thruster je...
2010,
22.
Abstract:
In order to optimize the design scheme of the wavefront control system in a high power solid-state laser facility, wavefront test and correction experiment are conducted on a verification facility. The results show that, although the equivalent numbe...
In order to optimize the design scheme of the wavefront control system in a high power solid-state laser facility, wavefront test and correction experiment are conducted on a verification facility. The results show that, although the equivalent numbe...
2010,
22.
Abstract:
A novel microstrip switch was developed based on micro-discharge plasma. The plasma switch is a dynamic device of microwave component to control the propagation of electromagnetic wave on the microstripline structure, which has a similar structure as...
A novel microstrip switch was developed based on micro-discharge plasma. The plasma switch is a dynamic device of microwave component to control the propagation of electromagnetic wave on the microstripline structure, which has a similar structure as...
2010,
22.
Abstract:
Employing Jones theory, thermal self-induced depolarization in high power conventional Faraday isolators is investigated with single mode and multimode lasers. The results show that depolarization in high power isolators is composed of depolarization...
Employing Jones theory, thermal self-induced depolarization in high power conventional Faraday isolators is investigated with single mode and multimode lasers. The results show that depolarization in high power isolators is composed of depolarization...
2010,
22.
Abstract:
The thermo-chemical ablation of the carbon-carbon complex material of hypersonic vehicles in the condition of aero-heating and laser ablation respectively and coupled aero-heating with laser ablation were calculated via the engineering calculation me...
The thermo-chemical ablation of the carbon-carbon complex material of hypersonic vehicles in the condition of aero-heating and laser ablation respectively and coupled aero-heating with laser ablation were calculated via the engineering calculation me...
2010,
22.
Abstract:
The principle of high power MOSFET generating high-current narrow-width pulses to drive laser diode is theoretically analyzed, and the formula of MOSFET gate drive current and the estimation formula of MOSFET drive rise time are obtained. The key fac...
The principle of high power MOSFET generating high-current narrow-width pulses to drive laser diode is theoretically analyzed, and the formula of MOSFET gate drive current and the estimation formula of MOSFET drive rise time are obtained. The key fac...
2010,
22.
Abstract:
The stochastic parallel gradient descent(SPGD) algorithm can optimize the system performance indexes directly to correct wavefront aberration. A 61-element adaptive optics system model based on SPGD algorithm was simulated. For different initial stat...
The stochastic parallel gradient descent(SPGD) algorithm can optimize the system performance indexes directly to correct wavefront aberration. A 61-element adaptive optics system model based on SPGD algorithm was simulated. For different initial stat...
2010,
22.
Abstract:
The influence of deflector position on characters of the streak tube is discussed. A large amount of electron trajectories are figured out by statistical simulation method, and the modulation transfer function(MTF) used to evaluate temporal and spati...
The influence of deflector position on characters of the streak tube is discussed. A large amount of electron trajectories are figured out by statistical simulation method, and the modulation transfer function(MTF) used to evaluate temporal and spati...
2010,
22.
Abstract:
The paper describes the design and construction of an intracavity intensity enhanced hot-band CW CO2 laser with the line selected by concave grating. In this laser, using a gas mixture of 13% CO2, 15% N2 and 72% He (volume fraction) at a total pressu...
The paper describes the design and construction of an intracavity intensity enhanced hot-band CW CO2 laser with the line selected by concave grating. In this laser, using a gas mixture of 13% CO2, 15% N2 and 72% He (volume fraction) at a total pressu...
2010,
22.
Abstract:
The analytical expression for the propagation of a radial Lorentz array beam with an initial phase distribution is derived and used to study the propagation properties of the coherently combined beam in free space. For the case of the radial Lorentz ...
The analytical expression for the propagation of a radial Lorentz array beam with an initial phase distribution is derived and used to study the propagation properties of the coherently combined beam in free space. For the case of the radial Lorentz ...
2010,
22.
Abstract:
The description of a Laguerre-Gaussian beam is directly derived from the Maxwell’s equations. According to the vector spectrum representation of the Maxwell’s equations and the vectorial structure of an electromagnetic beam, the analytical TE and TM ...
The description of a Laguerre-Gaussian beam is directly derived from the Maxwell’s equations. According to the vector spectrum representation of the Maxwell’s equations and the vectorial structure of an electromagnetic beam, the analytical TE and TM ...
2010,
22.
Abstract:
The oscillation condition for the simultaneous dual-wavelength operation and intracavity sum-frequency mixing in a diode-end-pumped Nd:YVO4 solid-state laser is analyzed. A CW laser at 491 nm is reported with an LD-pumped Nd:YVO4 crystal and a type I...
The oscillation condition for the simultaneous dual-wavelength operation and intracavity sum-frequency mixing in a diode-end-pumped Nd:YVO4 solid-state laser is analyzed. A CW laser at 491 nm is reported with an LD-pumped Nd:YVO4 crystal and a type I...
2010,
22.
Abstract:
Aiming at the all-optical regeneration based on self-phase modulation effect(SPM) in fiber, the effect of the chromatic dispersion on the transfer function and Q factor improvement of the regenerator was analyzed, as well as the interaction between c...
Aiming at the all-optical regeneration based on self-phase modulation effect(SPM) in fiber, the effect of the chromatic dispersion on the transfer function and Q factor improvement of the regenerator was analyzed, as well as the interaction between c...
2010,
22.
Abstract:
The effects of high temperature flowfields around hypersonic air vehicles on laser lethality have been analysed in the case of the American Airborne Laser(ABL) system, including the effects of gas breakdown, plasma shielding and ablation smoke absorp...
The effects of high temperature flowfields around hypersonic air vehicles on laser lethality have been analysed in the case of the American Airborne Laser(ABL) system, including the effects of gas breakdown, plasma shielding and ablation smoke absorp...
2010,
22.
Abstract:
The periodic cusped magnetic fields generated by a kind of air-core electromagnets made of thin metal sheets have been investigated analytically and numerically. The amplitude of the PCM fields can be increased through increasing the PCM period, decr...
The periodic cusped magnetic fields generated by a kind of air-core electromagnets made of thin metal sheets have been investigated analytically and numerically. The amplitude of the PCM fields can be increased through increasing the PCM period, decr...
2010,
22.
Abstract:
The structure of a 1 MV low-impedance accelerator and the design principles of its main switch were introduced. Optimized design and simulation of the oil switch, which was selected as the main switch, were carried out. The simulation showed when the...
The structure of a 1 MV low-impedance accelerator and the design principles of its main switch were introduced. Optimized design and simulation of the oil switch, which was selected as the main switch, were carried out. The simulation showed when the...
2010,
22.
Abstract:
The principle of an integrative denvice of Tesla transformer with Blumlein pulse forming line(PFL) has been introduced in the paper. The parameters of the Telsa transformer and the Blumlein PFL were designed, while the electrical field distribution o...
The principle of an integrative denvice of Tesla transformer with Blumlein pulse forming line(PFL) has been introduced in the paper. The parameters of the Telsa transformer and the Blumlein PFL were designed, while the electrical field distribution o...
2010,
22.
Abstract:
In order to investigate the nanosecond current interruption mechanism of semiconductor opening switch (SOS) with a doping profile of p+-p-n-n+ structure, a 1D circuit-fluid coupled model was developed by deriving a current-voltage relation expression...
In order to investigate the nanosecond current interruption mechanism of semiconductor opening switch (SOS) with a doping profile of p+-p-n-n+ structure, a 1D circuit-fluid coupled model was developed by deriving a current-voltage relation expression...
2010,
22.
Abstract:
The high power microwave(HPM) sources of peak power at GW class have the characteristics of large volume and heavy weight. In the application of HPM directional radiation, the microwave sources are generally static, and with the beam waveguide to adj...
The high power microwave(HPM) sources of peak power at GW class have the characteristics of large volume and heavy weight. In the application of HPM directional radiation, the microwave sources are generally static, and with the beam waveguide to adj...
2010,
22.
Abstract:
This paper describes the design and test results of an liner transformer driver(LTD) stage prototype and its multi-gap switch. This stage consists of 20 storage capacitors(100 kV/20 nF) that are arranged in 10 identical bricks locating evenly around ...
This paper describes the design and test results of an liner transformer driver(LTD) stage prototype and its multi-gap switch. This stage consists of 20 storage capacitors(100 kV/20 nF) that are arranged in 10 identical bricks locating evenly around ...
2010,
22.
Abstract:
A soft X-ray detector has been made with high quality chemical vapor deposited(CVD) diamond and the electrical structure of micro-strip. Through the measurement of response time on a laser with the pulse width of 10 ps, the full width at half maximum...
A soft X-ray detector has been made with high quality chemical vapor deposited(CVD) diamond and the electrical structure of micro-strip. Through the measurement of response time on a laser with the pulse width of 10 ps, the full width at half maximum...
2010,
22.
Abstract:
Taking the advantage of the BV theorem, a scattering model is established for the polarized light scattering from a spheroid particle on or near a wafer. The scattering process is analysed and the scattering coefficients are derived through expanding...
Taking the advantage of the BV theorem, a scattering model is established for the polarized light scattering from a spheroid particle on or near a wafer. The scattering process is analysed and the scattering coefficients are derived through expanding...
2010,
22.
Abstract:
A wideband spectrum of electromagnetic radiation from the special explosive which differs from high explosive has been measured. Four broadband antennas were employed to observe pulse electromagnetic radiation from a spherical explosive. The frequenc...
A wideband spectrum of electromagnetic radiation from the special explosive which differs from high explosive has been measured. Four broadband antennas were employed to observe pulse electromagnetic radiation from a spherical explosive. The frequenc...
2010,
22.
Abstract:
Acid etching combined with UV laser conditioning is developed to enhance the laser induced damage threshold (LIDT) of fused silica. Firstly, the fused silica is etched for 1~100 min with a buffered 1% HF solution. After acid etching, its transmittanc...
Acid etching combined with UV laser conditioning is developed to enhance the laser induced damage threshold (LIDT) of fused silica. Firstly, the fused silica is etched for 1~100 min with a buffered 1% HF solution. After acid etching, its transmittanc...
2010,
22.
Abstract:
In dynamic light scattering(DLS) measurement, auto correlation method is used for signal denoising, whose denoising effect is affected by data amount. Based on different characteristics of noises and signals, wavelet packet transform is used in the s...
In dynamic light scattering(DLS) measurement, auto correlation method is used for signal denoising, whose denoising effect is affected by data amount. Based on different characteristics of noises and signals, wavelet packet transform is used in the s...
2010,
22.
Abstract:
According to the B-H curve and structure dimensions of the Snubber, induction voltage and eddy current of any core lamination with the thickness of saturated regions are derived by referring to Fink’s method, when accelerator breakdown occurs at the ...
According to the B-H curve and structure dimensions of the Snubber, induction voltage and eddy current of any core lamination with the thickness of saturated regions are derived by referring to Fink’s method, when accelerator breakdown occurs at the ...
2010,
22.
Abstract:
Electrical aging of insulation materials affects the reliability and security of pulsed power equipments. Based on the present pulsed source, the electrical tree initiation characteristic of epoxy resin is studied under different frequencies (1, 25, ...
Electrical aging of insulation materials affects the reliability and security of pulsed power equipments. Based on the present pulsed source, the electrical tree initiation characteristic of epoxy resin is studied under different frequencies (1, 25, ...
2010,
22.
Abstract:
The electron irradiation ground simulation test was conducted on the ITO/F46/Ag thermal control coating. The variation of surface resistivity of the ITO/F46/Ag coating with electron fluence was discussed, and the scanning electron microscope was used...
The electron irradiation ground simulation test was conducted on the ITO/F46/Ag thermal control coating. The variation of surface resistivity of the ITO/F46/Ag coating with electron fluence was discussed, and the scanning electron microscope was used...
2010,
22.
Abstract:
This paper reports quantitative and qualitative analysis of metals in the liquid by laser-induced breakdown spectroscopy. The two measurement modes, liquid jets (diameter of 0.5 mm) and static liquids, have been used in experiments. The calibration c...
This paper reports quantitative and qualitative analysis of metals in the liquid by laser-induced breakdown spectroscopy. The two measurement modes, liquid jets (diameter of 0.5 mm) and static liquids, have been used in experiments. The calibration c...
2010,
22.
Abstract:
The structural and elastic properties of ZrH2 are investigated using the full-potential linearized augmented plane wave plus local orbital method within the generalized gradient in the frame of the density functional theory. The ground state properti...
The structural and elastic properties of ZrH2 are investigated using the full-potential linearized augmented plane wave plus local orbital method within the generalized gradient in the frame of the density functional theory. The ground state properti...
2010,
22.
Abstract:
A model of gas spark switch with rough cathode is presented. Utilizing the rough layer thickness and electric enhancement factor to characterize the cathode roughness, the breakdown situation of gas spark switch is studied by probability theory. Infl...
A model of gas spark switch with rough cathode is presented. Utilizing the rough layer thickness and electric enhancement factor to characterize the cathode roughness, the breakdown situation of gas spark switch is studied by probability theory. Infl...
2010,
22.
Abstract:
The distributions of the energy deposition of gamma-rays with various energies in LSO crystal were calculated by MCNP code and compared with the results of the experiment. The effects of different interactions between the ray and the material were an...
The distributions of the energy deposition of gamma-rays with various energies in LSO crystal were calculated by MCNP code and compared with the results of the experiment. The effects of different interactions between the ray and the material were an...
2010,
22.
Abstract:
The time-dependent-wave-packet plus the split-operator-Fourier method has been applied to studying the influence on the high harmonic generation of the different isotopes. The recollision probabilities of the isotopes H2, D2, and T2 have been got by ...
The time-dependent-wave-packet plus the split-operator-Fourier method has been applied to studying the influence on the high harmonic generation of the different isotopes. The recollision probabilities of the isotopes H2, D2, and T2 have been got by ...
2010,
22.
Abstract:
Experiments on the interaction of deuterium clusters with intense laser pulses have been performed on SILEX-Ⅰ. Faraday cups were used to characterize the deuterium ions emitted from laser irradiated gas plumes. The size and its distribution of the de...
Experiments on the interaction of deuterium clusters with intense laser pulses have been performed on SILEX-Ⅰ. Faraday cups were used to characterize the deuterium ions emitted from laser irradiated gas plumes. The size and its distribution of the de...
2010,
22.
Abstract:
The magnetic field generated by the solenoid mounted inside the accelerating cell is calculated. There are three steps to finish this work. Firstly, a formula of the ideal magnetic field of the solenoid is deduced according to the Biot-Savart law. Se...
The magnetic field generated by the solenoid mounted inside the accelerating cell is calculated. There are three steps to finish this work. Firstly, a formula of the ideal magnetic field of the solenoid is deduced according to the Biot-Savart law. Se...
2010,
22.
Abstract:
The super fragment separator (Super-FRS) of the FAIR-project (facility for antiproton and ion research) is a large international cooperation project. The quench transient thermal stress is simulated using FEM software ADINA. The simulation uses the C...
The super fragment separator (Super-FRS) of the FAIR-project (facility for antiproton and ion research) is a large international cooperation project. The quench transient thermal stress is simulated using FEM software ADINA. The simulation uses the C...
2010,
22.
Abstract:
Experiments have been done to study the magnetic characteristics of the magnetic cores under MHz repetition-rate multi-pulse excitation in the multi-pulse inductive accelerator. With a low-voltage (～1 kV) multi-pulse power system based on the MOSFET ...
Experiments have been done to study the magnetic characteristics of the magnetic cores under MHz repetition-rate multi-pulse excitation in the multi-pulse inductive accelerator. With a low-voltage (～1 kV) multi-pulse power system based on the MOSFET ...
