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RSS2005 Vol. 17, No. 07
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2005,
17.
Abstract:
Based on the theory of thermal elasticity of spherical symmetry, the laser-induced temperature rise and stress in silica glass or K9 glass, which contain high laser-absorptive platinum inclusion, are calculated from heat conduction and thermal stress...
Based on the theory of thermal elasticity of spherical symmetry, the laser-induced temperature rise and stress in silica glass or K9 glass, which contain high laser-absorptive platinum inclusion, are calculated from heat conduction and thermal stress...
2005,
17.
Abstract:
A physical model of InSb(PV) detector irradiated by CW laser was established. The distribution of temperature was studied by Gaussian beam with 2-D thermal model. The relationship between the temperature transformation and irradiation time was obtain...
A physical model of InSb(PV) detector irradiated by CW laser was established. The distribution of temperature was studied by Gaussian beam with 2-D thermal model. The relationship between the temperature transformation and irradiation time was obtain...
2005,
17.
Abstract:
The principle of a new one dimensional scanning apparatus named fixed angle plane reflective mirrors has been deduced and its optimized parameters of typical scanning distance of 10 cm and 6 cm have been calculated. Based on this scanning apparatus, ...
The principle of a new one dimensional scanning apparatus named fixed angle plane reflective mirrors has been deduced and its optimized parameters of typical scanning distance of 10 cm and 6 cm have been calculated. Based on this scanning apparatus, ...
2005,
17.
Abstract:
A double pulse trigger was designed，and the interval of the trigger pulse controlling the TEA laser high voltage switch could be adjusted from 5 ms to 100 ms to simulate different operating repetition rate of the TEA CO2 laser. By this means, the las...
A double pulse trigger was designed，and the interval of the trigger pulse controlling the TEA laser high voltage switch could be adjusted from 5 ms to 100 ms to simulate different operating repetition rate of the TEA CO2 laser. By this means, the las...
2005,
17.
Abstract:
The water vapor content in COIL was measured by absorption spectroscopy. Measurement results showed that the change of water vapor content due to the variation of the basic hydrogen peroxide (BHP) temperature could be ignored during normal operation....
The water vapor content in COIL was measured by absorption spectroscopy. Measurement results showed that the change of water vapor content due to the variation of the basic hydrogen peroxide (BHP) temperature could be ignored during normal operation....
2005,
17.
Abstract:
The wavefront distribution and the dynamic wavefront change of laser beam traversing a supersonic flow could be measured with Hartmann-Shack wavefront sensor. The centroid shift and the far-field distribution of laser beam could be obtained by furthe...
The wavefront distribution and the dynamic wavefront change of laser beam traversing a supersonic flow could be measured with Hartmann-Shack wavefront sensor. The centroid shift and the far-field distribution of laser beam could be obtained by furthe...
2005,
17.
Abstract:
Multi-order Stokes generation in pure CH4 and its He/Ar mixture pumped by a pulsed Nd:YAG laser at 355 nm were investigated. Maximum energy conversion efficiencies as high as 71% and 38% (i.e. quantum efficiency of 79% and 48%), much higher than thos...
Multi-order Stokes generation in pure CH4 and its He/Ar mixture pumped by a pulsed Nd:YAG laser at 355 nm were investigated. Maximum energy conversion efficiencies as high as 71% and 38% (i.e. quantum efficiency of 79% and 48%), much higher than thos...
2005,
17.
Abstract:
As for the temporal phase modulated broadband laser, by using some numerical techniques such as split-step Fourier transformation and fourth-order Runge-Kutta method, the effect of the intensity and bandwidth of the incident fundamental field, as wel...
As for the temporal phase modulated broadband laser, by using some numerical techniques such as split-step Fourier transformation and fourth-order Runge-Kutta method, the effect of the intensity and bandwidth of the incident fundamental field, as wel...
2005,
17.
Abstract:
The mechanical behavior and tensile spallation of pure aluminium subjected to intense laser irradiation were studied experimentally. The thicknesses of the samples are 200 μm and 485 μm, respectively.The laser irradiation intensity was in the range o...
The mechanical behavior and tensile spallation of pure aluminium subjected to intense laser irradiation were studied experimentally. The thicknesses of the samples are 200 μm and 485 μm, respectively.The laser irradiation intensity was in the range o...
2005,
17.
Abstract:
Experiment of the double-clad Yb-doped fiber amplifiers is discussed. The signal with 7 mW average power at 25.4 MHz repetition rate is amplified to 505 mW by using 0.5 m length of double-clad Yb-doped fiber when launched pumping power is 1.9 W, corr...
Experiment of the double-clad Yb-doped fiber amplifiers is discussed. The signal with 7 mW average power at 25.4 MHz repetition rate is amplified to 505 mW by using 0.5 m length of double-clad Yb-doped fiber when launched pumping power is 1.9 W, corr...
2005,
17.
Abstract:
As a new tool to detect atmosphere, lidar can derive the value of visibility by directly collecting the scatterd laser from the atmosphere. It makes lidar become a main instrument for measuring visibility. The schematic diagram and key parameters fro...
As a new tool to detect atmosphere, lidar can derive the value of visibility by directly collecting the scatterd laser from the atmosphere. It makes lidar become a main instrument for measuring visibility. The schematic diagram and key parameters fro...
2005,
17.
Abstract:
Target detection in a sequence of image is difficult when this target is small, faint, and obscured. In this paper, a method based on wavelet multi-resolution analysis and data fusion technology is presented for faint-target detection. The detection ...
Target detection in a sequence of image is difficult when this target is small, faint, and obscured. In this paper, a method based on wavelet multi-resolution analysis and data fusion technology is presented for faint-target detection. The detection ...
2005,
17.
Abstract:
The metallized film pulse capacitor is a key component of the inertial confinement laser fusion facility. For the high reliability capacitors, it is difficult to assess the reliability by using the traditional time-to-failure analysis method. By anal...
The metallized film pulse capacitor is a key component of the inertial confinement laser fusion facility. For the high reliability capacitors, it is difficult to assess the reliability by using the traditional time-to-failure analysis method. By anal...
2005,
17.
Abstract:
Copper nanoparticles were synthesized by the flow-levitation method and they were coated with the carbon-and-hydrogen films through the hollow-cathode glow discharge(HCGD). The growth mechanism of the coating films was described. The HCGD with a volt...
Copper nanoparticles were synthesized by the flow-levitation method and they were coated with the carbon-and-hydrogen films through the hollow-cathode glow discharge(HCGD). The growth mechanism of the coating films was described. The HCGD with a volt...
2005,
17.
Abstract:
DPFA new type of differential interferometer using a defocused 4f imaging system is described. The interferometer is stable and easy to adjust with a ring structure. The shear amount and fringe spacing can be adjusted independently with the defocused...
DPFA new type of differential interferometer using a defocused 4f imaging system is described. The interferometer is stable and easy to adjust with a ring structure. The shear amount and fringe spacing can be adjusted independently with the defocused...
2005,
17.
Abstract:
With inorganic compounds, hollow glass microsphere (HGM) of above 10% molar ratio K2O was prepared by liquid-droplet method.The glass forming oxides content in solutions and technical conditions of preparing were optimized and selected. The molar rat...
With inorganic compounds, hollow glass microsphere (HGM) of above 10% molar ratio K2O was prepared by liquid-droplet method.The glass forming oxides content in solutions and technical conditions of preparing were optimized and selected. The molar rat...
2005,
17.
Abstract:
The properties and derivation of defects in thin film are introduced in this paper. The influence of the deposition rate of YbF3 on the surface defect density of infrared laser thin film is analyzed. The appropriate deposition rate of YbF3 on the thi...
The properties and derivation of defects in thin film are introduced in this paper. The influence of the deposition rate of YbF3 on the surface defect density of infrared laser thin film is analyzed. The appropriate deposition rate of YbF3 on the thi...
2005,
17.
Abstract:
The ultra-fine molybdenum wire is often used for Z-pinch experiment. To improve the performance of the molybdenum wire, the sulfite pulse gilding technique was used to plate a compact gold layer on the wire. The technological conditions were optimize...
The ultra-fine molybdenum wire is often used for Z-pinch experiment. To improve the performance of the molybdenum wire, the sulfite pulse gilding technique was used to plate a compact gold layer on the wire. The technological conditions were optimize...
2005,
17.
Abstract:
Lightning electromagnetic pulse field (LEMP) was simulated to study its effect on naked radio fuze. The voltage wave from MARX generator was injected into GTEM cell to simulate the electric field of LEMP, and the pulse current wave from lightning sur...
Lightning electromagnetic pulse field (LEMP) was simulated to study its effect on naked radio fuze. The voltage wave from MARX generator was injected into GTEM cell to simulate the electric field of LEMP, and the pulse current wave from lightning sur...
2005,
17.
Abstract:
This work focused on the metal posts' scattering calculation and design in coaxial waveguide (CWG), which are useful in many high-power microwave devices. The calculation model was constructed by equating CWG with rectangular waveguide. The scatterin...
This work focused on the metal posts' scattering calculation and design in coaxial waveguide (CWG), which are useful in many high-power microwave devices. The calculation model was constructed by equating CWG with rectangular waveguide. The scatterin...
2005,
17.
Abstract:
This paper provides a simple technique to design and optimize the spiral waveguide of Gyro-TWT. The dispersion characteristics of helical waveguide was given out. The structure of waveguide was modeled by CAD and it′s dispersion curve was calculated ...
This paper provides a simple technique to design and optimize the spiral waveguide of Gyro-TWT. The dispersion characteristics of helical waveguide was given out. The structure of waveguide was modeled by CAD and it′s dispersion curve was calculated ...
2005,
17.
Abstract:
The physical mechanism of delayed breakdown diode(DBD) was analyzed. Considering both the amplitude and the rise time of the output pulse across the load, the characteristics of DBD with different structure parameters and physical parameters (length,...
The physical mechanism of delayed breakdown diode(DBD) was analyzed. Considering both the amplitude and the rise time of the output pulse across the load, the characteristics of DBD with different structure parameters and physical parameters (length,...
2005,
17.
Abstract:
The inter-related parameters of higher-order TM mode was investigated of microwave cylindrical coaxial cavities. Using FORTRAN program, parameters of the cavity were obtained, such as cavities' size, orders of TM mode, frequencies, radii of positions...
The inter-related parameters of higher-order TM mode was investigated of microwave cylindrical coaxial cavities. Using FORTRAN program, parameters of the cavity were obtained, such as cavities' size, orders of TM mode, frequencies, radii of positions...
2005,
17.
Abstract:
The beam parameters of high energy and high current LIA are very important for the debugging work. For its ultra-fast response and high resolution, OTR is used to measure both spatial and angular profiles of an electron beam. A time-resolved measurem...
The beam parameters of high energy and high current LIA are very important for the debugging work. For its ultra-fast response and high resolution, OTR is used to measure both spatial and angular profiles of an electron beam. A time-resolved measurem...
2005,
17.
Abstract:
The paper introduced a dispenser cathode (411 M) which was 55 mm in diameter. A 200 kV long pulsed power generator with 2 μs flattop based on Marx-PEN and system with heat and voltage insulation were built. A 52 A space charge limited current was gai...
The paper introduced a dispenser cathode (411 M) which was 55 mm in diameter. A 200 kV long pulsed power generator with 2 μs flattop based on Marx-PEN and system with heat and voltage insulation were built. A 52 A space charge limited current was gai...
2005,
17.
Abstract:
The 4 MV electrostatic accelerator consists of four parts, a high voltage system, an ion source and beam transmission system, a control system and a gas system. Some technical problems arose during the debugging of the accelerator. The ion source did...
The 4 MV electrostatic accelerator consists of four parts, a high voltage system, an ion source and beam transmission system, a control system and a gas system. Some technical problems arose during the debugging of the accelerator. The ion source did...
2005,
17.
Abstract:
The cooling time and cooling efficiency in electron cooling device strongly depend on the transverse temperature of electron beam. In order to reduce this temperature, a new type of cooling section solenoid composed of 68 coils was used in the HIRFL-...
The cooling time and cooling efficiency in electron cooling device strongly depend on the transverse temperature of electron beam. In order to reduce this temperature, a new type of cooling section solenoid composed of 68 coils was used in the HIRFL-...
2005,
17.
Abstract:
An electron gun was designed and the beam optics for a China-made 50 MW klystron was simulated. The electron gun ceramic cylinder was designed and optimized. The China-made cathode was replaced with an imported one to lessen evaporation and arcing. T...
An electron gun was designed and the beam optics for a China-made 50 MW klystron was simulated. The electron gun ceramic cylinder was designed and optimized. The China-made cathode was replaced with an imported one to lessen evaporation and arcing. T...
2005,
17.
Abstract:
RF superconducting cavities can work at CW mode or long pulse mode with high accelerating gradient. RF superconducting technology is widely used in particle accelerators. A lot of front scientific facilities are set up based on RF superconducting acc...
RF superconducting cavities can work at CW mode or long pulse mode with high accelerating gradient. RF superconducting technology is widely used in particle accelerators. A lot of front scientific facilities are set up based on RF superconducting acc...
2005,
17.
Abstract:
Experimental study on discharge characteristics of high pressure subnanosecond N2 switch was carried out by using a high voltage nanosecond generator in the article. The results show that when N2 pressure ranges from 3 to 10 MPa and gap distance rang...
Experimental study on discharge characteristics of high pressure subnanosecond N2 switch was carried out by using a high voltage nanosecond generator in the article. The results show that when N2 pressure ranges from 3 to 10 MPa and gap distance rang...
2005,
17.
Abstract:
The characteristics of different types of MPL were analyzed and the convolutional PML was chosen to truncate the open boundaries in numerical simulation of nuclear electromagnetic pulse from air explosions. On the basis of the split-field PML and the...
The characteristics of different types of MPL were analyzed and the convolutional PML was chosen to truncate the open boundaries in numerical simulation of nuclear electromagnetic pulse from air explosions. On the basis of the split-field PML and the...
2005,
17.
Abstract:
A circuit model for Yang accelerator's water transmission line and magnetically insulated transmission line (MITL) based on their impedance characteristics was employed to simulate the experiments, among which the one for a shorted load was perfectly...
A circuit model for Yang accelerator's water transmission line and magnetically insulated transmission line (MITL) based on their impedance characteristics was employed to simulate the experiments, among which the one for a shorted load was perfectly...
2005,
17.
Abstract:
The tune modulation due to power supply ripple of magnets has a strong destabilizing effects on non-linear motion. In order to investigate this effect on the dynamic aperture of HIRFL-CSRm, a tracking study was done. The impacts of quadrupole power s...
The tune modulation due to power supply ripple of magnets has a strong destabilizing effects on non-linear motion. In order to investigate this effect on the dynamic aperture of HIRFL-CSRm, a tracking study was done. The impacts of quadrupole power s...
2005,
17.
Abstract:
Single transmission line theory was introduced. Three PFLs were serially triggered to form a 3-pulse and a sequence of 3-pulse was produced along the same time axis. In the experiment, a 300 kV Marx generator was used to supply high voltage for 3 PFL...
Single transmission line theory was introduced. Three PFLs were serially triggered to form a 3-pulse and a sequence of 3-pulse was produced along the same time axis. In the experiment, a 300 kV Marx generator was used to supply high voltage for 3 PFL...
2005,
17.
Abstract:
Based on the constrained conjugate gradient algorithm, a regularization preconditioned constrained conjugate gradient algorithm (RPCCG) was proposed for image-reconstruction for radiography. The RPCCG used the Tikhonov regularization criterions to ge...
Based on the constrained conjugate gradient algorithm, a regularization preconditioned constrained conjugate gradient algorithm (RPCCG) was proposed for image-reconstruction for radiography. The RPCCG used the Tikhonov regularization criterions to ge...
2005,
17.
Abstract:
The relation between -3 dB frequency of amplitude-frequency characteristics and 10% to 90% risetime of unit-step response is studied for one- and two-stage resistive voltage dividers with and without inductance compensation. The product of the -3 dB ...
The relation between -3 dB frequency of amplitude-frequency characteristics and 10% to 90% risetime of unit-step response is studied for one- and two-stage resistive voltage dividers with and without inductance compensation. The product of the -3 dB ...
