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RSS2006 Vol. 18, No. 02
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2006,
18.
Abstract:
numberical simulation method of Mikhailovskii's physics model about dispersion laws of relativistic plasma of Fermi distribution is presented and the method is proved peasible. The result of the method inosculates with the result of Mikhailovskii's t...
numberical simulation method of Mikhailovskii's physics model about dispersion laws of relativistic plasma of Fermi distribution is presented and the method is proved peasible. The result of the method inosculates with the result of Mikhailovskii's t...
2006,
18.
Abstract:
In this paper we reported a ring-shaped LaB6 cathode with a large emission area of 115 mm2. The direct emission current density of the LaB6 was more than 40 A/cm2 when the temperature of LaB6 was 1 873 K. The heating power for the LaB6 cathode was on...
In this paper we reported a ring-shaped LaB6 cathode with a large emission area of 115 mm2. The direct emission current density of the LaB6 was more than 40 A/cm2 when the temperature of LaB6 was 1 873 K. The heating power for the LaB6 cathode was on...
2006,
18.
Abstract:
United with RKR potential function and the newest EDMF, the program Level developed by Prof. Le Roy of Canada to calculate bi-molecule spectroscopic constants was used to compute the Einstein spontaneous emission coefficients(A coefficients) for fund...
United with RKR potential function and the newest EDMF, the program Level developed by Prof. Le Roy of Canada to calculate bi-molecule spectroscopic constants was used to compute the Einstein spontaneous emission coefficients(A coefficients) for fund...
2006,
18.
Abstract:
The spectrum of incident electrons and emitted photons on the anode surface of the diode were calculated and analyzed by Monte Carlo Code MCNP/4C and Matlab, according to relations between the structure, operation parameters of the diodes and emitted...
The spectrum of incident electrons and emitted photons on the anode surface of the diode were calculated and analyzed by Monte Carlo Code MCNP/4C and Matlab, according to relations between the structure, operation parameters of the diodes and emitted...
2006,
18.
Abstract:
This paper depicts in brief the basic information of ACTEL's antifuse-based FPGA(field programmable gate array)and the working theory of FPGA delay circuits. The method of measurement of FPGA delay circuits on Qiangguang Ⅰgenerator is discussed. And ...
This paper depicts in brief the basic information of ACTEL's antifuse-based FPGA(field programmable gate array)and the working theory of FPGA delay circuits. The method of measurement of FPGA delay circuits on Qiangguang Ⅰgenerator is discussed. And ...
2006,
18.
Abstract:
In this paper, the simulation of interaction between scintillation fibers and 14 MeV neutrons after penetrating through objects is presented. The neutron radiation is converted to green light (496 nm) in scintillation fibers, and the number of photon...
In this paper, the simulation of interaction between scintillation fibers and 14 MeV neutrons after penetrating through objects is presented. The neutron radiation is converted to green light (496 nm) in scintillation fibers, and the number of photon...
2006,
18.
Abstract:
Phase locking of a diode laser array in an external Talbot cavity was studied. Far field distributions of in-phase mode and out-of-phase mode were calculated using Fresnel diffraction formula of one-dimension on the basis of near field amplitude dist...
Phase locking of a diode laser array in an external Talbot cavity was studied. Far field distributions of in-phase mode and out-of-phase mode were calculated using Fresnel diffraction formula of one-dimension on the basis of near field amplitude dist...
2006,
18.
Abstract:
The surface reflectivity change process of the 45# steel irradiated by repetitive pulse laser in atmosphere is studied by the measurement of the reflectivity and the metallographical and surface energy spectrum analysis of the recovered samples. The ...
The surface reflectivity change process of the 45# steel irradiated by repetitive pulse laser in atmosphere is studied by the measurement of the reflectivity and the metallographical and surface energy spectrum analysis of the recovered samples. The ...
2006,
18.
Abstract:
This paper selects the Blumlein circuit as the main discharge circuit and sets up the discretization equivalent model for the Blumlein circuit. The simulation and the optimum design of the circuit are carried out by using this model. A group of circu...
This paper selects the Blumlein circuit as the main discharge circuit and sets up the discretization equivalent model for the Blumlein circuit. The simulation and the optimum design of the circuit are carried out by using this model. A group of circu...
2006,
18.
Abstract:
The principle to measure the impulse coupling coefficients of laser propulsion with a pendulum system was provided. The impulse coupling coefficients of a parabol laser propulsion thruster were measured with a pendulum system using air, He, N2 or Ar ...
The principle to measure the impulse coupling coefficients of laser propulsion with a pendulum system was provided. The impulse coupling coefficients of a parabol laser propulsion thruster were measured with a pendulum system using air, He, N2 or Ar ...
2006,
18.
Abstract:
The theories of cuneiform prism and series neutral glass slices used as laser attenuator are analyzed in this paper. An aberration-free laser quantitative attenuator made of cuneiform prism is adopted and a series of neutral attenuated slices are use...
The theories of cuneiform prism and series neutral glass slices used as laser attenuator are analyzed in this paper. An aberration-free laser quantitative attenuator made of cuneiform prism is adopted and a series of neutral attenuated slices are use...
2006,
18.
Abstract:
The nozzle is one of the most important parts of a laser thruster. It can be designed with the focusing system together. It can also be designed independently without considering the focusing system. For the latter case, an ignition mode was set up w...
The nozzle is one of the most important parts of a laser thruster. It can be designed with the focusing system together. It can also be designed independently without considering the focusing system. For the latter case, an ignition mode was set up w...
2006,
18.
Abstract:
The abnormal responsive mechanism of photoconductive semiconductor detectors irradiated by off-band laser, hot electron photoconductivity, was proposed. The response of a photoconductive semiconductor detector under off-band laser irradiation is diff...
The abnormal responsive mechanism of photoconductive semiconductor detectors irradiated by off-band laser, hot electron photoconductivity, was proposed. The response of a photoconductive semiconductor detector under off-band laser irradiation is diff...
2006,
18.
Abstract:
Based on the traditional Shark-Hartmann wave-front measurement, a wave-front measuring method suitable for large scale telescope system was proposed. A set of pentagonal prism beam turning devices were introduced to transfer quasi-reference beam to s...
Based on the traditional Shark-Hartmann wave-front measurement, a wave-front measuring method suitable for large scale telescope system was proposed. A set of pentagonal prism beam turning devices were introduced to transfer quasi-reference beam to s...
2006,
18.
Abstract:
An effective gain of 23.8 cm-1 has been got at 1.2×1013 W·cm-2. In this paper, using series codes, quasi-stable Ni-like Ag collisional excitation scheme driven by laser with grazing incidence is studied. Compared with normal incidence, at a drive int...
An effective gain of 23.8 cm-1 has been got at 1.2×1013 W·cm-2. In this paper, using series codes, quasi-stable Ni-like Ag collisional excitation scheme driven by laser with grazing incidence is studied. Compared with normal incidence, at a drive int...
2006,
18.
Abstract:
Using di-ethoxy-silicane as precursor, a colloidal prepolymer was developed from sol-gel process. With silica colloid as modifier, the modified moisture-resistant films were prepared on neodymium-doped phosphate glass by spin coating. When the mole r...
Using di-ethoxy-silicane as precursor, a colloidal prepolymer was developed from sol-gel process. With silica colloid as modifier, the modified moisture-resistant films were prepared on neodymium-doped phosphate glass by spin coating. When the mole r...
2006,
18.
Abstract:
The flat crystal spectrometer is one of the fundamental tools to diagnose X-ray. Quasi-quantitative and quantitative analyses of X-ray spectra require calibrations of the flat crystal’s characteristic parameters, such as integral reflective coefficie...
The flat crystal spectrometer is one of the fundamental tools to diagnose X-ray. Quasi-quantitative and quantitative analyses of X-ray spectra require calibrations of the flat crystal’s characteristic parameters, such as integral reflective coefficie...
2006,
18.
Abstract:
To resolve the problem of phase separation in PMMA/SiO2 hybrids system, different polymethyl methacrylate(PMMA)/SiO2 hybrids were prepared by synchronous sol-gel process. There is a covalent bond between PMMA and SiO2. The samples were characterized ...
To resolve the problem of phase separation in PMMA/SiO2 hybrids system, different polymethyl methacrylate(PMMA)/SiO2 hybrids were prepared by synchronous sol-gel process. There is a covalent bond between PMMA and SiO2. The samples were characterized ...
2006,
18.
Abstract:
The CCD’s optics-electron characteristic is an important parameter when it is applied to measuring the energy distribution of laser’s far-field and near-field. A new method of calibrating the CCD’s optics-electron characteristic is introduced in this...
The CCD’s optics-electron characteristic is an important parameter when it is applied to measuring the energy distribution of laser’s far-field and near-field. A new method of calibrating the CCD’s optics-electron characteristic is introduced in this...
2006,
18.
Abstract:
Coupling efficiencies of TE11 and TM01 modes oscillating with radial injected electron beam in coaxial vircator present nearly the same value for coaxial geometry. 3D PIC simulation result shows that non-poloidal uniform mode dominates the output pow...
Coupling efficiencies of TE11 and TM01 modes oscillating with radial injected electron beam in coaxial vircator present nearly the same value for coaxial geometry. 3D PIC simulation result shows that non-poloidal uniform mode dominates the output pow...
2006,
18.
Abstract:
A virtual cathode oscillator (VCO) with an axially extracted TE10 mode of rectangular waveguide is investigated by PIC simulation which emits microwaves axially through an antenna without mode converter or transition waveguide, making the system more...
A virtual cathode oscillator (VCO) with an axially extracted TE10 mode of rectangular waveguide is investigated by PIC simulation which emits microwaves axially through an antenna without mode converter or transition waveguide, making the system more...
2006,
18.
Abstract:
The preliminary design of a new high-power low-pressure plasma-cathode e-gun is presented. Based on the hollow cathode effect and low-pressure glow discharge empirical formulas, the hollow cathode, the accelerating gap, and the working gas pressure r...
The preliminary design of a new high-power low-pressure plasma-cathode e-gun is presented. Based on the hollow cathode effect and low-pressure glow discharge empirical formulas, the hollow cathode, the accelerating gap, and the working gas pressure r...
2006,
18.
Abstract:
In this paper, a linear theory is presented of a relativistic high power microwave generator with coaxial slow wave structure. The space-charge-limiting current of a coaxial cylindrical waveguide is derived, which is larger than that of a hollow cyli...
In this paper, a linear theory is presented of a relativistic high power microwave generator with coaxial slow wave structure. The space-charge-limiting current of a coaxial cylindrical waveguide is derived, which is larger than that of a hollow cyli...
2006,
18.
Abstract:
A new method, the field analysis method is used to calculate the gap-impedance in a klystron output circuit based on the analysis of the electromagnetic field components and microwave circuit theory. The impedance superposition method is presented fo...
A new method, the field analysis method is used to calculate the gap-impedance in a klystron output circuit based on the analysis of the electromagnetic field components and microwave circuit theory. The impedance superposition method is presented fo...
2006,
18.
Abstract:
In this paper, experimental findings on the coaxial virtual cathode oscillator at Institute of Applied Electronics of CAEP are reported. The experiments show that the output microwave power and spectrum of a coaxial vircator with the reflector are ev...
In this paper, experimental findings on the coaxial virtual cathode oscillator at Institute of Applied Electronics of CAEP are reported. The experiments show that the output microwave power and spectrum of a coaxial vircator with the reflector are ev...
2006,
18.
Abstract:
An L-band 100 kW multi-beam klystron electron optics system was simulated using MAFIA, to which a MACRO program had been added. The effect of three-dimensional magnetic field on electron trajectories was analyzed. Among the center beam, inner beam an...
An L-band 100 kW multi-beam klystron electron optics system was simulated using MAFIA, to which a MACRO program had been added. The effect of three-dimensional magnetic field on electron trajectories was analyzed. Among the center beam, inner beam an...
2006,
18.
Abstract:
In this paper, a measurement system of UWS electromagnetic pulse radiating field is developed, which consisted of TEM horn, coaxial transmitting line, wide band oscillograph and data processing software for the compensation of signal attenuation and ...
In this paper, a measurement system of UWS electromagnetic pulse radiating field is developed, which consisted of TEM horn, coaxial transmitting line, wide band oscillograph and data processing software for the compensation of signal attenuation and ...
2006,
18.
Abstract:
The helical array antenna fed from radial waveguide is a kind of new antenna to realize the directional radiation of high power microwave. In this paper, the optimized simulation result of a helical array antenna fed from double-layered radial wavegu...
The helical array antenna fed from radial waveguide is a kind of new antenna to realize the directional radiation of high power microwave. In this paper, the optimized simulation result of a helical array antenna fed from double-layered radial wavegu...
2006,
18.
Abstract:
Studies were carried out to optimize the operation of a high-voltage and high-repetition-rate trigatron switch, including optimization of the insulation structure, the diameter of the trigger hole and the position of the trigger electrode. Some exper...
Studies were carried out to optimize the operation of a high-voltage and high-repetition-rate trigatron switch, including optimization of the insulation structure, the diameter of the trigger hole and the position of the trigger electrode. Some exper...
2006,
18.
Abstract:
In BEPC, the oscillation information of the beam position of a single bunch in every turn can be tracked by the bunch-by-bunch system, through which the relationships between the transverse damping time and the beam current, chromaticity, octupole cu...
In BEPC, the oscillation information of the beam position of a single bunch in every turn can be tracked by the bunch-by-bunch system, through which the relationships between the transverse damping time and the beam current, chromaticity, octupole cu...
2006,
18.
Abstract:
A 120 MW pulsed electron gun has been developed for 50 MW China-made klystron. It has a Pierce type dispenser cathode and it scans with a diameter of 85 mm. This paper describes the temperature field distribution in the gun and the gun deformation ca...
A 120 MW pulsed electron gun has been developed for 50 MW China-made klystron. It has a Pierce type dispenser cathode and it scans with a diameter of 85 mm. This paper describes the temperature field distribution in the gun and the gun deformation ca...
2006,
18.
Abstract:
According to the time-frequency localization properties of wavelet transform, the application methods in pulse signal′s de-noising and singularity detection show good performance in signal processing of high current LIA. A method to extract character...
According to the time-frequency localization properties of wavelet transform, the application methods in pulse signal′s de-noising and singularity detection show good performance in signal processing of high current LIA. A method to extract character...
2006,
18.
Abstract:
This paper presents a newly implemented wideband(100 MHz) bunch oscillation measurement system, which is in nature different from the narrow-band (<5 MHz) facilities employed before. Basic formalism and implementation details of the system are int...
This paper presents a newly implemented wideband(100 MHz) bunch oscillation measurement system, which is in nature different from the narrow-band (<5 MHz) facilities employed before. Basic formalism and implementation details of the system are int...
2006,
18.
Abstract:
In order to cure and suppress beam instabilities caused by the high order modes (HOM) in the RF cavity and the resistive wall impedance of the vacuum chamber, a bunch by bunch measuring and transverse feedback system of broad band with two BPM is und...
In order to cure and suppress beam instabilities caused by the high order modes (HOM) in the RF cavity and the resistive wall impedance of the vacuum chamber, a bunch by bunch measuring and transverse feedback system of broad band with two BPM is und...
2006,
18.
Abstract:
The high power waveguide valve is a major part of microwave system for BEPCⅡ-Linac. As an ultra-high vacuum RF component with functions of microwave high power transmission and vacuum sealing, it has a complicated structure and is difficult to fabric...
The high power waveguide valve is a major part of microwave system for BEPCⅡ-Linac. As an ultra-high vacuum RF component with functions of microwave high power transmission and vacuum sealing, it has a complicated structure and is difficult to fabric...
2006,
18.
Abstract:
The on-line measurement system based on OTR can be used to measure the parameters of the intense electron beam, such as beam energy, divergence and emittance, and it has characteristics of ultra-fast response and high special resolution. With the emb...
The on-line measurement system based on OTR can be used to measure the parameters of the intense electron beam, such as beam energy, divergence and emittance, and it has characteristics of ultra-fast response and high special resolution. With the emb...
2006,
18.
Abstract:
X-band pulse compression equipment is simulated by the finite element method. The influence on resonance frequency and quality factor of some parameters, such as the length of the cavity, the width of the input iris and the location of the output cou...
X-band pulse compression equipment is simulated by the finite element method. The influence on resonance frequency and quality factor of some parameters, such as the length of the cavity, the width of the input iris and the location of the output cou...
2006,
18.
Abstract:
The optimization design of the electrode was of great influence on the switch in pulsed power. The charge simulation method was used to simulate the electric field, the rotating ellipse method to optimize the electrode’s figure, the Particle Swarm Op...
The optimization design of the electrode was of great influence on the switch in pulsed power. The charge simulation method was used to simulate the electric field, the rotating ellipse method to optimize the electrode’s figure, the Particle Swarm Op...
2006,
18.
Abstract:
A method of time domain calibration and data processing on pulsed current probe which is based on Rogowski coil is introduced. The result of time domain calibration using pulsed signal is compared with the frequency domain calibration result. A dynam...
A method of time domain calibration and data processing on pulsed current probe which is based on Rogowski coil is introduced. The result of time domain calibration using pulsed signal is compared with the frequency domain calibration result. A dynam...
2006,
18.
Abstract:
The current loss in magnetically insulated transmission line(MITL) on pulsed power installation “S-300” is studied by measuring bremsstrahlung between the electrodes, current and voltage in the load. Three kinds of load were used in experiments and t...
The current loss in magnetically insulated transmission line(MITL) on pulsed power installation “S-300” is studied by measuring bremsstrahlung between the electrodes, current and voltage in the load. Three kinds of load were used in experiments and t...
2006,
18.
Abstract:
In a lot of single-shot applications and experiments at remote locations where magnetic flux compression generator(MFCG) provides the most practicable power, it is impracticable or inconvenient to use a capacitor bank to be the initial energy source....
In a lot of single-shot applications and experiments at remote locations where magnetic flux compression generator(MFCG) provides the most practicable power, it is impracticable or inconvenient to use a capacitor bank to be the initial energy source....
2006,
18.
Abstract:
A planar spark gap switch with three electrodes which is suitable for connecting parallel-plate transmission lines is developed. The shape of positive and negative electrodes of the switch is semicircle, and the triggering electrode is a thin strip. ...
A planar spark gap switch with three electrodes which is suitable for connecting parallel-plate transmission lines is developed. The shape of positive and negative electrodes of the switch is semicircle, and the triggering electrode is a thin strip. ...
