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RSS2004 Vol. 16, No. 12
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2004,
16.
Abstract:
Computer tomography is widely used in density measurement, and this method is also introduced into analysis of airflow as optical tomography. The airflow characteristic of thermal blooming in high energy laser(HEL) beam and the disadvantage of tradit...
Computer tomography is widely used in density measurement, and this method is also introduced into analysis of airflow as optical tomography. The airflow characteristic of thermal blooming in high energy laser(HEL) beam and the disadvantage of tradit...
2004,
16.
Abstract:
A new method of faint-target detection is put forward. To improve the practicality of the method, especially it is used to deal with those images that involves the complex background and a lot of noise, the method of neighborhood entropy was brought ...
A new method of faint-target detection is put forward. To improve the practicality of the method, especially it is used to deal with those images that involves the complex background and a lot of noise, the method of neighborhood entropy was brought ...
2004,
16.
Abstract:
Numerical analysis of a Yb3+-doped fiber laser pumped by 980nm laser source has been presented in this paper. It has been studied that the relationships between the important characteristics of the Yb3+ doped fiber laser such as threshold power, outp...
Numerical analysis of a Yb3+-doped fiber laser pumped by 980nm laser source has been presented in this paper. It has been studied that the relationships between the important characteristics of the Yb3+ doped fiber laser such as threshold power, outp...
2004,
16.
Abstract:
The influence of penetration depth of iodine flow on COIL output power was experimentally investigated on a COIL with a 250mmol/s (Cl2 flowrate) pipe-array jet-type singlet oxygen generator. The experimental results showed that penetration depth stro...
The influence of penetration depth of iodine flow on COIL output power was experimentally investigated on a COIL with a 250mmol/s (Cl2 flowrate) pipe-array jet-type singlet oxygen generator. The experimental results showed that penetration depth stro...
2004,
16.
Abstract:
The X-ray transmission property of mono-capillaries is the basis for designing X-ray lens. Based on the theory of X-ray transmission through capillaries, a detailed Monte-Carlo method is suggested in this paper. A corresponding computer program is wo...
The X-ray transmission property of mono-capillaries is the basis for designing X-ray lens. Based on the theory of X-ray transmission through capillaries, a detailed Monte-Carlo method is suggested in this paper. A corresponding computer program is wo...
2004,
16.
Abstract:
Ｕsing the surface thermal lensing technique, weak absorption of different optical thin films, including the single-layer ZnS and YbF3 dielectric thin films with different thickness, as well as the different multilayer thin films YbF3/ZnS deposited on...
Ｕsing the surface thermal lensing technique, weak absorption of different optical thin films, including the single-layer ZnS and YbF3 dielectric thin films with different thickness, as well as the different multilayer thin films YbF3/ZnS deposited on...
2004,
16.
Abstract:
The irradiating style of laser relative to the flying cylinder has to be considered whether the laser is from land or air. With specific assumptions, the analytical expressions of heating power area density distribution on the side of the cylinder is...
The irradiating style of laser relative to the flying cylinder has to be considered whether the laser is from land or air. With specific assumptions, the analytical expressions of heating power area density distribution on the side of the cylinder is...
2004,
16.
Abstract:
The effect of the phase-change cooling mirror will depend on the fabrication. Compared to the different computing result through finite element method, the radialized shape is chosen to be the optimum design. For Si mirror, with 80mm in diameter and ...
The effect of the phase-change cooling mirror will depend on the fabrication. Compared to the different computing result through finite element method, the radialized shape is chosen to be the optimum design. For Si mirror, with 80mm in diameter and ...
2004,
16.
Abstract:
An analytic solution of Yb-doped double-clad fiber lasers(DCFL) is presented, and some typical parameters which may influence the slope efficiency of DCFL are discussed based on this analytic solution, such as the reflection of pump power and the sig...
An analytic solution of Yb-doped double-clad fiber lasers(DCFL) is presented, and some typical parameters which may influence the slope efficiency of DCFL are discussed based on this analytic solution, such as the reflection of pump power and the sig...
2004,
16.
Abstract:
Designs of targets used in the current Rayleigh-Taylor instability experiments are analyzed and summarized in this paper. The preparation of the perturbation target is developing from two-dimensional to three-dimensional. New designs such as spheric ...
Designs of targets used in the current Rayleigh-Taylor instability experiments are analyzed and summarized in this paper. The preparation of the perturbation target is developing from two-dimensional to three-dimensional. New designs such as spheric ...
2004,
16.
Abstract:
Based on the closed-form propagation expression of Hermite-coshGaussian beams passing through an unapertured thin lens, intensity distributions in focal region were studied. Focal shifts of the beams and dependences of maximal intensity position on ...
Based on the closed-form propagation expression of Hermite-coshGaussian beams passing through an unapertured thin lens, intensity distributions in focal region were studied. Focal shifts of the beams and dependences of maximal intensity position on ...
2004,
16.
Abstract:
laser system with high output stability was designed for three-stage optical parametric chirped-pulse amplification(OPCPA). The PPKTP crystal was chosed as the first-stage gain medium, the LBO and the KDP crystal were used for the second-stage and th...
laser system with high output stability was designed for three-stage optical parametric chirped-pulse amplification(OPCPA). The PPKTP crystal was chosed as the first-stage gain medium, the LBO and the KDP crystal were used for the second-stage and th...
2004,
16.
Abstract:
In order to study the influence by pre-pulse discharge on capillary discharge pumped X-ray Laser, in this paper, a simplified XDCH code is used to simulate the process of pre-discharge with 2μs pulse width in polythene capillary filled with Ar. The p...
In order to study the influence by pre-pulse discharge on capillary discharge pumped X-ray Laser, in this paper, a simplified XDCH code is used to simulate the process of pre-discharge with 2μs pulse width in polythene capillary filled with Ar. The p...
2004,
16.
Abstract:
The X-ray radiography technique was used to measure ICF targets and record film images of microspheres using contact microradiography. Then the film images were set under the microscope and converted to digital images by a CCD camera. Based on the in...
The X-ray radiography technique was used to measure ICF targets and record film images of microspheres using contact microradiography. Then the film images were set under the microscope and converted to digital images by a CCD camera. Based on the in...
2004,
16.
Abstract:
The detection system consists of filter,XRD,SUJ-50-10 cable and different band oscillograph. 20TW laser facility of Shanghai Laser Unite Laboratory with energy about 20J,pulse width about 1ps was used, and Au foil target irradiated by laser pulse pro...
The detection system consists of filter,XRD,SUJ-50-10 cable and different band oscillograph. 20TW laser facility of Shanghai Laser Unite Laboratory with energy about 20J,pulse width about 1ps was used, and Au foil target irradiated by laser pulse pro...
2004,
16.
Abstract:
This paper presents a theoretical analysis model based on the parapotential flow and “fourphase” charge flow models.The model could more exactly describe the physics process in a low-impedance MA intense pinched beam diode. In the model, the evoluti...
This paper presents a theoretical analysis model based on the parapotential flow and “fourphase” charge flow models.The model could more exactly describe the physics process in a low-impedance MA intense pinched beam diode. In the model, the evoluti...
2004,
16.
Abstract:
This article presents experimental results of the trigger characteristics of fast-pulse-triggered polymer-foil switch. The results show that the ratio of working voltage to self-greakdown voltage, the trigger voltage, the polarity and the distances b...
This article presents experimental results of the trigger characteristics of fast-pulse-triggered polymer-foil switch. The results show that the ratio of working voltage to self-greakdown voltage, the trigger voltage, the polarity and the distances b...
2004,
16.
Abstract:
In this paper, the multiple scattering effects of residual gas as isotropic disturbing forces, are introduced into the RMS envelope equation of cylindrically symmetric DC electron beams, so that the expression of emittance growth due to the scatterin...
In this paper, the multiple scattering effects of residual gas as isotropic disturbing forces, are introduced into the RMS envelope equation of cylindrically symmetric DC electron beams, so that the expression of emittance growth due to the scatterin...
2004,
16.
Abstract:
The configuration and simulation model of water pulse forming line switch with prepulse suppression ground plane (PPS) were introduced in this paper. The influence of the PPS was analyzed using Pspice. As well as the capacitances between the electrod...
The configuration and simulation model of water pulse forming line switch with prepulse suppression ground plane (PPS) were introduced in this paper. The influence of the PPS was analyzed using Pspice. As well as the capacitances between the electrod...
2004,
16.
Abstract:
The process of bearing balls in the plasma immersion ion implantation(PIII) was simulated using a 2-dimensional particle-in-cell (PIC) model. The distributions of normalized potential and dose were studied. In order to avoid overlap of sheaths betwee...
The process of bearing balls in the plasma immersion ion implantation(PIII) was simulated using a 2-dimensional particle-in-cell (PIC) model. The distributions of normalized potential and dose were studied. In order to avoid overlap of sheaths betwee...
2004,
16.
Abstract:
Being a novel functional material, the ferroelectric cathode materials were studied well with the leaded materials for their high electron emission density. In this paper, the initial experiment of electron emission was carried out with the lead-free...
Being a novel functional material, the ferroelectric cathode materials were studied well with the leaded materials for their high electron emission density. In this paper, the initial experiment of electron emission was carried out with the lead-free...
2004,
16.
Abstract:
Principle of flash X-ray radiography was introduced and relative mass absorption coefficient were put forward for flash radiography.Based on mono-energy model,the radiographic image was determined by path-length of object only, so the relative mass a...
Principle of flash X-ray radiography was introduced and relative mass absorption coefficient were put forward for flash radiography.Based on mono-energy model,the radiographic image was determined by path-length of object only, so the relative mass a...
2004,
16.
Abstract:
This paper firstly derives expressions of current and voltage at various work modes for the series resonant charging power supply, gives recursion formulas calculating the value of current and voltage at various periods; secondly, utilizing recursion...
This paper firstly derives expressions of current and voltage at various work modes for the series resonant charging power supply, gives recursion formulas calculating the value of current and voltage at various periods; secondly, utilizing recursion...
2004,
16.
Abstract:
A switch with three groups of electrodes was developed. The feasibility of the concomitance of multi-group electrodes, the switch structure and the internal electric field were analyzed. The current through the switch was calculated using the softwar...
A switch with three groups of electrodes was developed. The feasibility of the concomitance of multi-group electrodes, the switch structure and the internal electric field were analyzed. The current through the switch was calculated using the softwar...
2004,
16.
Abstract:
Using the water and ethylene glycol mixtures with volume fraction of 36.5%,48.7%,59.0% and 71.2% as the dielectric of the coaxial transmission line, experimental research on the breakdown of mixtures when the inner conductor was charged negative volt...
Using the water and ethylene glycol mixtures with volume fraction of 36.5%,48.7%,59.0% and 71.2% as the dielectric of the coaxial transmission line, experimental research on the breakdown of mixtures when the inner conductor was charged negative volt...
2004,
16.
Abstract:
Magnetic field affects strongly characteristics of spherical cathode diode. The numerical research shows that the effect of magnetic field (include self-magnetic field and external magnetic field) on diode takes place via varying the tracks of electr...
Magnetic field affects strongly characteristics of spherical cathode diode. The numerical research shows that the effect of magnetic field (include self-magnetic field and external magnetic field) on diode takes place via varying the tracks of electr...
2004,
16.
Abstract:
In this paper, the pulse shortening phenomena in relativistic backward wave oscillator(RBWO) are studied by means of the particle-in-cell method under two conditions of filling He gas or remaining background gas in the tube. The calculation results p...
In this paper, the pulse shortening phenomena in relativistic backward wave oscillator(RBWO) are studied by means of the particle-in-cell method under two conditions of filling He gas or remaining background gas in the tube. The calculation results p...
2004,
16.
Abstract:
The coaxial output-cavity with large coupling holes is often used in the high power microwave devices. The structure of this cavity is three dimensional with travelling wave boundary, and it is very difficult to calculate its high frequency character...
The coaxial output-cavity with large coupling holes is often used in the high power microwave devices. The structure of this cavity is three dimensional with travelling wave boundary, and it is very difficult to calculate its high frequency character...
2004,
16.
Abstract:
Maxwell's equations combined with heat transport equation have been solved by using FDTD with the leapfrog technique to simulate the microwave heating to water. The temperature distribution of water in the beaker is obtained.The efficiency of microwa...
Maxwell's equations combined with heat transport equation have been solved by using FDTD with the leapfrog technique to simulate the microwave heating to water. The temperature distribution of water in the beaker is obtained.The efficiency of microwa...
2004,
16.
Abstract:
The illumination of a 3D human body model by electromagnetic pulse (EMP) is numerically analyzed with frequency-dependence time-domain finitedifference ((FD)２TD) method. The fields in the body exhibit a strong dependence on the rise time of the illu...
The illumination of a 3D human body model by electromagnetic pulse (EMP) is numerically analyzed with frequency-dependence time-domain finitedifference ((FD)２TD) method. The fields in the body exhibit a strong dependence on the rise time of the illu...
2004,
16.
Abstract:
It is found that frequency tunability of the modulated current is related to periodicity of the Bessel's function of first kind.Ｒesponding to a same numerical values of the Bessel's function, there may be several numerical values of argument of the B...
It is found that frequency tunability of the modulated current is related to periodicity of the Bessel's function of first kind.Ｒesponding to a same numerical values of the Bessel's function, there may be several numerical values of argument of the B...
2004,
16.
Abstract:
In this paper, FDTD method incorporated with periodic boundary condition is applied to solve the near fields for dielectric gratings with plane wave illumination. Then the diffraction characteristics of transmission gratings are analyzed. The size of...
In this paper, FDTD method incorporated with periodic boundary condition is applied to solve the near fields for dielectric gratings with plane wave illumination. Then the diffraction characteristics of transmission gratings are analyzed. The size of...
