Email alert
RSS2006 Vol. 18, No. 12
Recommend Articles
Display Method:
2006,
18.
Abstract:
The solid heat capacity laser needs cooling after continuous operation for a short time before the next operation, so the cooling speed directly affects its working efficiency. The Nd: GGG disk laser medium end symmetrically pumped from four directio...
The solid heat capacity laser needs cooling after continuous operation for a short time before the next operation, so the cooling speed directly affects its working efficiency. The Nd: GGG disk laser medium end symmetrically pumped from four directio...
2006,
18.
Abstract:
In order to explore new high power laser systems, a liquid laser pumped by diode was build up. In the experiment, diode laser was adopted to pump neodymium ion doped inorganic laser liquid on single side. By measuring the near field profile, pulse sh...
In order to explore new high power laser systems, a liquid laser pumped by diode was build up. In the experiment, diode laser was adopted to pump neodymium ion doped inorganic laser liquid on single side. By measuring the near field profile, pulse sh...
2006,
18.
Abstract:
Based on analysis for nozzle thermal ablation, reflecting and absorbing thermal protection approaches were presented to provide thermal protection for nozzles. Two types of corresponding nozzles were designed. Initial investigation was carried out on...
Based on analysis for nozzle thermal ablation, reflecting and absorbing thermal protection approaches were presented to provide thermal protection for nozzles. Two types of corresponding nozzles were designed. Initial investigation was carried out on...
2006,
18.
Abstract:
Researches into effects of temperature rising rate on mechanical properties of metals under rapid heating are reviewed, including those carried out by American researchers using methods of macroscopic tensile-heating experiments in 1950 or so and tho...
Researches into effects of temperature rising rate on mechanical properties of metals under rapid heating are reviewed, including those carried out by American researchers using methods of macroscopic tensile-heating experiments in 1950 or so and tho...
2006,
18.
Abstract:
An analytic formula for the mean temperature along the axial direction of a rotating cylinder shell irradiated by high energy laser beams is presented. For the laser beam with Gaussian distribution of power density, it’s very difficult to give an ana...
An analytic formula for the mean temperature along the axial direction of a rotating cylinder shell irradiated by high energy laser beams is presented. For the laser beam with Gaussian distribution of power density, it’s very difficult to give an ana...
2006,
18.
Abstract:
For restraining the temperature excursion accumulation and the anti-Stokes back-scattering intermingling with the Rayleigh back-scattering, an optical fiber sampling ring was set after an inswept death section of the sensing optical fiber. The anti-S...
For restraining the temperature excursion accumulation and the anti-Stokes back-scattering intermingling with the Rayleigh back-scattering, an optical fiber sampling ring was set after an inswept death section of the sensing optical fiber. The anti-S...
2006,
18.
Abstract:
In order to use the laser energy efficiently, a numerical model is presented to simulate the temperature distribution on the rotational cylindrical shell under CW and repetition frequency laser irradiation . By numerical analyzing, a conclusion is dr...
In order to use the laser energy efficiently, a numerical model is presented to simulate the temperature distribution on the rotational cylindrical shell under CW and repetition frequency laser irradiation . By numerical analyzing, a conclusion is dr...
2006,
18.
Abstract:
The dispersions resulted from practical stretcher and compressor in optical parametric chirped pulse amplify system are studied by ray-tracing method, and the pulse amplify is numerically simulated using Runge-Kutta method. The effects of misalignmen...
The dispersions resulted from practical stretcher and compressor in optical parametric chirped pulse amplify system are studied by ray-tracing method, and the pulse amplify is numerically simulated using Runge-Kutta method. The effects of misalignmen...
2006,
18.
Abstract:
Sodium resonance fluorescence lidar was used to detect sodium layer at Hefei. The configuration of sodium resonance fluorescence lidar was introduced. The measurement data have been retrieved and analyzed. The results show that the density of sodium ...
Sodium resonance fluorescence lidar was used to detect sodium layer at Hefei. The configuration of sodium resonance fluorescence lidar was introduced. The measurement data have been retrieved and analyzed. The results show that the density of sodium ...
2006,
18.
Abstract:
By analysing the performance features of laser diode array end-pumped disk laser amplifier, a finite element thermal model of laser crystal Nd:YLF was established. 3D and transient distributions of temperature and thermal stress of Nd:YLF pumped with...
By analysing the performance features of laser diode array end-pumped disk laser amplifier, a finite element thermal model of laser crystal Nd:YLF was established. 3D and transient distributions of temperature and thermal stress of Nd:YLF pumped with...
2006,
18.
Abstract:
The iso-pressure approximation model used in laser propagation in gas medium and its disadvantage under complex border conditions were analyzed. The weakly compressible fluid model based on the Mach uniform method introduced by Peter Wesseling was de...
The iso-pressure approximation model used in laser propagation in gas medium and its disadvantage under complex border conditions were analyzed. The weakly compressible fluid model based on the Mach uniform method introduced by Peter Wesseling was de...
2006,
18.
Abstract:
The principle of single frequency operation of the fiber laser with mode selected with fiber Bragg grating Fabry-Perot etalon is presented. The all-fiber single frequency Er3+-doped fiber ring laser has been designed in which two 976 nm laser dodes a...
The principle of single frequency operation of the fiber laser with mode selected with fiber Bragg grating Fabry-Perot etalon is presented. The all-fiber single frequency Er3+-doped fiber ring laser has been designed in which two 976 nm laser dodes a...
2006,
18.
Abstract:
A synthesis of carbon nanotubes(CNT) for field emission was grown speedly and vertically by microwave plasma chemical vapor deposition with a multi-layered stack as the catalyst lay. The SEM and TEM analysis results of the CNT samples showed that as-...
A synthesis of carbon nanotubes(CNT) for field emission was grown speedly and vertically by microwave plasma chemical vapor deposition with a multi-layered stack as the catalyst lay. The SEM and TEM analysis results of the CNT samples showed that as-...
2006,
18.
Abstract:
Environment temperature is an important factor affecting the stability of electron beam orbit . Most accelerator laboratories of the world have built environment temperature monitoring systems and air-condition systems. HLS is a light source of the s...
Environment temperature is an important factor affecting the stability of electron beam orbit . Most accelerator laboratories of the world have built environment temperature monitoring systems and air-condition systems. HLS is a light source of the s...
2006,
18.
Abstract:
Based on a water-dielectric helix line, a 2.2 m long accelerator with a diameter of 0.4 m was designed and tested. The influence of the impedence mismatching between the joint section in pulse forming line and the helical line on the voltage waveform...
Based on a water-dielectric helix line, a 2.2 m long accelerator with a diameter of 0.4 m was designed and tested. The influence of the impedence mismatching between the joint section in pulse forming line and the helical line on the voltage waveform...
2006,
18.
Abstract:
FDTD method of lossy left-handed material is used to simulate the focus of a parallel-sided slab illuminated by a monochromatic source on the far side. Different slab thickness structures are simulated separately. Comparison shows that the thinner LH...
FDTD method of lossy left-handed material is used to simulate the focus of a parallel-sided slab illuminated by a monochromatic source on the far side. Different slab thickness structures are simulated separately. Comparison shows that the thinner LH...
2006,
18.
Abstract:
Axial vircators driven by hollow electron beam and solid electron beam, respectively, are compared with each other and analyzed theoretically. The output power of microwave under the same structural parameters was numerically calculated for compariso...
Axial vircators driven by hollow electron beam and solid electron beam, respectively, are compared with each other and analyzed theoretically. The output power of microwave under the same structural parameters was numerically calculated for compariso...
2006,
18.
Abstract:
Through numerical calculation, S-band magnetically insulated line oscillator (S-MILO) is calculated. The frequencies of the π/4, π/2, 3π/4 and π mode of primary coaxial slow wave structure (SWS) cavity calculated in the simulation are 1.40, 2.21, 2.4...
Through numerical calculation, S-band magnetically insulated line oscillator (S-MILO) is calculated. The frequencies of the π/4, π/2, 3π/4 and π mode of primary coaxial slow wave structure (SWS) cavity calculated in the simulation are 1.40, 2.21, 2.4...
2006,
18.
Abstract:
In the summer of 2005, a comprehensive observation on triggered lightning discharges was conducted in Binzhou, Shandong. Five lightning flashes were successfully triggered with three with classical triggering method and two with altitude triggering m...
In the summer of 2005, a comprehensive observation on triggered lightning discharges was conducted in Binzhou, Shandong. Five lightning flashes were successfully triggered with three with classical triggering method and two with altitude triggering m...
2006,
18.
Abstract:
The Dyadic Green’s function about spherical-shell microwave windows is presented in this paper, with which the influence on radiation pattern caused by the hemispherical-shell microwave windows is analyzed. The results show that the effect on the rad...
The Dyadic Green’s function about spherical-shell microwave windows is presented in this paper, with which the influence on radiation pattern caused by the hemispherical-shell microwave windows is analyzed. The results show that the effect on the rad...
2006,
18.
Abstract:
An electron gun and a magnetic-focus system for folded waveguide millimeter-wave traveling wave tube(TWT) were designed by electron gun code(VBGUN) based on visual boundary element method and magnetic field code(MOM) based on boundary element method....
An electron gun and a magnetic-focus system for folded waveguide millimeter-wave traveling wave tube(TWT) were designed by electron gun code(VBGUN) based on visual boundary element method and magnetic field code(MOM) based on boundary element method....
2006,
18.
Abstract:
The one dimensional(1-D) USED CARS experimental system was constructed. The 1-D CARS spectra of N2 Q-branch were obtained from the air as well as premixed CH4/Air flame with the equivalence ratio phi being 1, the flux per minute of methane being 0.7 ...
The one dimensional(1-D) USED CARS experimental system was constructed. The 1-D CARS spectra of N2 Q-branch were obtained from the air as well as premixed CH4/Air flame with the equivalence ratio phi being 1, the flux per minute of methane being 0.7 ...
2006,
18.
Abstract:
The effects of bipolar flow on the performance of planar diode are analyzed and simulated by a PIC code. The effects of bipolar flow in an MILO device with radial emission are simulated. Some qualitative conclusions in this kind of microwave tube wit...
The effects of bipolar flow on the performance of planar diode are analyzed and simulated by a PIC code. The effects of bipolar flow in an MILO device with radial emission are simulated. Some qualitative conclusions in this kind of microwave tube wit...
2006,
18.
Abstract:
Three-fold helical rippled waveguide makes TE11 and TE21 coupling, the dispersion characteristic in physical mechanism make the electron the cyclotron resonance in the broad frequency band, so the dispersion equation need to be researched. The disper...
Three-fold helical rippled waveguide makes TE11 and TE21 coupling, the dispersion characteristic in physical mechanism make the electron the cyclotron resonance in the broad frequency band, so the dispersion equation need to be researched. The disper...
2006,
18.
Abstract:
Microwave equivalent circuit (microwave net) is adopt to study the rectangle wave-guide output window of klystron. Transfer matrix is utilized to calculate the standing wave ratio and optimal size of the window is found based on the condition of no r...
Microwave equivalent circuit (microwave net) is adopt to study the rectangle wave-guide output window of klystron. Transfer matrix is utilized to calculate the standing wave ratio and optimal size of the window is found based on the condition of no r...
2006,
18.
Abstract:
This paper presents an overmoded complex device of which the output power may approach 10 GW level without breakdown, derives self-consistently the phase lock equation of the radiation wave of the device driven by both the external electromagnetic si...
This paper presents an overmoded complex device of which the output power may approach 10 GW level without breakdown, derives self-consistently the phase lock equation of the radiation wave of the device driven by both the external electromagnetic si...
2006,
18.
Abstract:
The paper analyzes the characteristic of a multiple-beam klystron output circuit, π-mode double gap cavity loaded by cutoff waveguide filter, with 3D simulation method. The research is focused on the influence of the size of the coupling port, coupli...
The paper analyzes the characteristic of a multiple-beam klystron output circuit, π-mode double gap cavity loaded by cutoff waveguide filter, with 3D simulation method. The research is focused on the influence of the size of the coupling port, coupli...
2006,
18.
Abstract:
The finite-difference time-domain(FDTD) method is widely used to solve electromagnetic problems in computer simulation. Some common problems for design of excitation source in waveguide are discussed in the first instance. According to the propagatio...
The finite-difference time-domain(FDTD) method is widely used to solve electromagnetic problems in computer simulation. Some common problems for design of excitation source in waveguide are discussed in the first instance. According to the propagatio...
2006,
18.
Abstract:
A 70 GHz second-harmonic frequency-doubling gyroklystron with four cavities has been studied. The input cavity operates in the fundamental harmonic TE01 mode at 35 GHz and the other cavities operate in the second harmonic TE02 mode at 70 GHz. The qua...
A 70 GHz second-harmonic frequency-doubling gyroklystron with four cavities has been studied. The input cavity operates in the fundamental harmonic TE01 mode at 35 GHz and the other cavities operate in the second harmonic TE02 mode at 70 GHz. The qua...
2006,
18.
Abstract:
Radiation transport in matter can be supersonic when the Mach number of the heat wave front is typically over 3. In this paper, the conditions under which the supersonic radiation transport was diffusive were investigated in the case of an external r...
Radiation transport in matter can be supersonic when the Mach number of the heat wave front is typically over 3. In this paper, the conditions under which the supersonic radiation transport was diffusive were investigated in the case of an external r...
2006,
18.
Abstract:
A general Godunov finite difference schemes-WENO（weighted essentially non-oscillatory）Schemes which have fifth-order accuracy is used to make a numerical calculation of 2-dimensional axis symmetrical laser-supported plasma flow field under laser abla...
A general Godunov finite difference schemes-WENO（weighted essentially non-oscillatory）Schemes which have fifth-order accuracy is used to make a numerical calculation of 2-dimensional axis symmetrical laser-supported plasma flow field under laser abla...
2006,
18.
Abstract:
Based on the experience of adaptive optics application in high power laser systems, a deformable mirror located at cavity mirror can largely improve the dynamic range of correction aberrations. The four-pass amplifier laser facility has two features ...
Based on the experience of adaptive optics application in high power laser systems, a deformable mirror located at cavity mirror can largely improve the dynamic range of correction aberrations. The four-pass amplifier laser facility has two features ...
2006,
18.
Abstract:
Silver nanoclusters were prepared by flow-levitation technique. The nucleation and growth mechanism of the nanoclusters were studied theoretically, and the experiment conditions and technological parameters were studied experimentally. The morphology...
Silver nanoclusters were prepared by flow-levitation technique. The nucleation and growth mechanism of the nanoclusters were studied theoretically, and the experiment conditions and technological parameters were studied experimentally. The morphology...
2006,
18.
Abstract:
Discharge cell fixed on metal objects surface has great application values, so it is necessary to study its discharge features. In this paper, the discharge process is simulated. To solve the float conductor boundary condition problem, a method is pr...
Discharge cell fixed on metal objects surface has great application values, so it is necessary to study its discharge features. In this paper, the discharge process is simulated. To solve the float conductor boundary condition problem, a method is pr...
2006,
18.
Abstract:
Surface irradiation of refractory alloy DZ4 is now realized by using high intensity pulsed ion beam(HIPIB) containing Cn+ and H+, where the accelerating voltage, pulse duration and current density were fixed at 250 kV, 70 ns and 160 A/cm2 respectivel...
Surface irradiation of refractory alloy DZ4 is now realized by using high intensity pulsed ion beam(HIPIB) containing Cn+ and H+, where the accelerating voltage, pulse duration and current density were fixed at 250 kV, 70 ns and 160 A/cm2 respectivel...
2006,
18.
Abstract:
In conventional radiography, X rays which pass through an object along different paths are differentially absorbed, and the intensity pattern of the emerging beam records the distribution of absorbing materials within the sample. A non-conventional X...
In conventional radiography, X rays which pass through an object along different paths are differentially absorbed, and the intensity pattern of the emerging beam records the distribution of absorbing materials within the sample. A non-conventional X...
2006,
18.
Abstract:
By using the Fourier optics, a theoretical model based on the far field is put forward for the coherent addition of multi-ultrashort pulses. The impacts of all kinds of errors on the temporal and spatial properties in the far field are studied for a ...
By using the Fourier optics, a theoretical model based on the far field is put forward for the coherent addition of multi-ultrashort pulses. The impacts of all kinds of errors on the temporal and spatial properties in the far field are studied for a ...
2006,
18.
Abstract:
Tungsten wire array Z-pinch experiments performed on a 100 kA, 100 ns rise-time POS-based inductive generator were reported. The array consisted of 2 or 4 tungsten wires of 7 mm or 20 mm in diameter. Plasma luminescence pictures with 0.05 mm/ns resol...
Tungsten wire array Z-pinch experiments performed on a 100 kA, 100 ns rise-time POS-based inductive generator were reported. The array consisted of 2 or 4 tungsten wires of 7 mm or 20 mm in diameter. Plasma luminescence pictures with 0.05 mm/ns resol...
2006,
18.
Abstract:
In this paper the circuit modeling of parallel transmission lines by TLCODE method is introduced. The formula of interface voltage between parallel transmission lines and the series transmission line, necessary for TLCODE, is deduced, and a PSPICE ci...
In this paper the circuit modeling of parallel transmission lines by TLCODE method is introduced. The formula of interface voltage between parallel transmission lines and the series transmission line, necessary for TLCODE, is deduced, and a PSPICE ci...
