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RSS2007 Vol. 19, No. 01
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2007,
19.
Abstract:
Taking the second-order-moment and power of the bucket as the beam width definition, changes of the beam parameters such as the beam width and farfield divergence angle of Gaussian beams after passing through an astigmatic lens are studied both anal...
Taking the second-order-moment and power of the bucket as the beam width definition, changes of the beam parameters such as the beam width and farfield divergence angle of Gaussian beams after passing through an astigmatic lens are studied both anal...
2007,
19.
Abstract:
In order to investigate the thermal effect of moving quartz glass heated by CO2 laser, a mathematical model was established as the influence of irradiation and convection was considered. The temperature distribution was obtained using the software AN...
In order to investigate the thermal effect of moving quartz glass heated by CO2 laser, a mathematical model was established as the influence of irradiation and convection was considered. The temperature distribution was obtained using the software AN...
2007,
19.
Abstract:
In the experiment of 100 TW laser interacting with 5 μm thick Cu target, CR39 and Thomson spectrum are used to detect the energy spectra of proton and radiochromic HD810 is used to detect the distribution of protons at the normal direction of the tar...
In the experiment of 100 TW laser interacting with 5 μm thick Cu target, CR39 and Thomson spectrum are used to detect the energy spectra of proton and radiochromic HD810 is used to detect the distribution of protons at the normal direction of the tar...
2007,
19.
Abstract:
Using 1.06 μm single pulse laser to irradiate optical element model of photoelectricity system in different energy density, physical model of multilayer films is found and temperature field of facula center, radial direction and axes direction is cal...
Using 1.06 μm single pulse laser to irradiate optical element model of photoelectricity system in different energy density, physical model of multilayer films is found and temperature field of facula center, radial direction and axes direction is cal...
2007,
19.
Abstract:
The matching angle, the efficient nonlinear coefficient and the temporal and spatial walk-off length of collinear and non-collinear phase-matching for ultra-short mid-infrared laser optical parametric amplification in MgO:LiNbO3 crystal are analyzed....
The matching angle, the efficient nonlinear coefficient and the temporal and spatial walk-off length of collinear and non-collinear phase-matching for ultra-short mid-infrared laser optical parametric amplification in MgO:LiNbO3 crystal are analyzed....
2007,
19.
Abstract:
Phase locking of a diode laser array by an external cavity consisting of a mode selecting mirror or a phase grid was studied theoretically, on the basis of Fresnel diffraction and coupled mode theory. The relative complex amplitude distribution of th...
Phase locking of a diode laser array by an external cavity consisting of a mode selecting mirror or a phase grid was studied theoretically, on the basis of Fresnel diffraction and coupled mode theory. The relative complex amplitude distribution of th...
2007,
19.
Abstract:
High precision wavefront reconstruction is very important for effective compensation, control and quality improvement of high power laser beam. The low and the middle and high frequency components of the distorted wavefront in the high power laser sy...
High precision wavefront reconstruction is very important for effective compensation, control and quality improvement of high power laser beam. The low and the middle and high frequency components of the distorted wavefront in the high power laser sy...
2007,
19.
Abstract:
The spraying auto-decomposition of NCl3 was preliminarily investigated in a cylindrical gas flow tube. The red flame of NCl3 auto-decomposition by spraying was observed and its spectrum was measured. The spectrum was attributed to Cl2(B→X) transition...
The spraying auto-decomposition of NCl3 was preliminarily investigated in a cylindrical gas flow tube. The red flame of NCl3 auto-decomposition by spraying was observed and its spectrum was measured. The spectrum was attributed to Cl2(B→X) transition...
2007,
19.
Abstract:
The master oscillator, power amplifier arrangement was experimentally investigated. The master laser was divided into 2 paths by a fiber beam splitter, and the two amplified beams were combined by a fiber coupler. A sample of the combined beam was re...
The master oscillator, power amplifier arrangement was experimentally investigated. The master laser was divided into 2 paths by a fiber beam splitter, and the two amplified beams were combined by a fiber coupler. A sample of the combined beam was re...
2007,
19.
Abstract:
For a pulsed kJ-level high energy Nd: glass solid-state laser, temperature distributions have been numerically studied under two thermal management methods, a traditional method with a fixed cooling water temperature, and a novel method with a prompt...
For a pulsed kJ-level high energy Nd: glass solid-state laser, temperature distributions have been numerically studied under two thermal management methods, a traditional method with a fixed cooling water temperature, and a novel method with a prompt...
2007,
19.
Abstract:
The laser angle detection system using different optical transformation characters of the beam expander in forward and converse dirction, and the angle sensitive multiply optical system of bi-directional transmission in a common aperture is combined ...
The laser angle detection system using different optical transformation characters of the beam expander in forward and converse dirction, and the angle sensitive multiply optical system of bi-directional transmission in a common aperture is combined ...
2007,
19.
Abstract:
The concept of repetitively-pumped times of atomic iodine in COIL was introduced. According to the law of energy-conservation, an equivalent lasing model was built. The non-extractable residual energy while lasing, the relaxation period for upper ene...
The concept of repetitively-pumped times of atomic iodine in COIL was introduced. According to the law of energy-conservation, an equivalent lasing model was built. The non-extractable residual energy while lasing, the relaxation period for upper ene...
2007,
19.
Abstract:
Influences on the mode of positive-branch confocal unstable resonator are analyzed, which is caused by deformation of resonator mirrors. The coupling relations between deformation of resonator mirrors and laser modes are solved by using methods of ti...
Influences on the mode of positive-branch confocal unstable resonator are analyzed, which is caused by deformation of resonator mirrors. The coupling relations between deformation of resonator mirrors and laser modes are solved by using methods of ti...
2007,
19.
Abstract:
Because of the reflection on the surface of the gratings, the transmittance of the components can not meet the requirement of the inertial confinement fusion(ICF) system. To resolve the problem, this paper introduces a kind of scheme adopting coating...
Because of the reflection on the surface of the gratings, the transmittance of the components can not meet the requirement of the inertial confinement fusion(ICF) system. To resolve the problem, this paper introduces a kind of scheme adopting coating...
2007,
19.
Abstract:
The high intensity pulse source of soft X-ray for calibration was formed with multilayer mirror as dispersive elements and laser plasma interaction as X-ray source. The monochromator system with 4 channels was set up and its performance was studied o...
The high intensity pulse source of soft X-ray for calibration was formed with multilayer mirror as dispersive elements and laser plasma interaction as X-ray source. The monochromator system with 4 channels was set up and its performance was studied o...
2007,
19.
Abstract:
The gradient bromating amorphous hydrogenated carbon films were prepared by low-pressure plasma chemical vapor deposition (LPPCVD) method using the mixture of bromoethane and hydrogen as source gas. The relationships of the film deposition rate and t...
The gradient bromating amorphous hydrogenated carbon films were prepared by low-pressure plasma chemical vapor deposition (LPPCVD) method using the mixture of bromoethane and hydrogen as source gas. The relationships of the film deposition rate and t...
2007,
19.
Abstract:
The feasibility of gradient optical films taking the place of classical layered structure high-reflectivity films in the field of high power laser is theoretically studied. To study the wavelength matching and electric field distribution, an example ...
The feasibility of gradient optical films taking the place of classical layered structure high-reflectivity films in the field of high power laser is theoretically studied. To study the wavelength matching and electric field distribution, an example ...
2007,
19.
Abstract:
High density resorcinol-formaldehyde carbonized aerogel(CRF) ICF target was prepared from resorcinol and formaldehyde by improving synthesis conditions, and the cracking problem of high density CRF aerogels was solved. The elements and phase of CRF c...
High density resorcinol-formaldehyde carbonized aerogel(CRF) ICF target was prepared from resorcinol and formaldehyde by improving synthesis conditions, and the cracking problem of high density CRF aerogels was solved. The elements and phase of CRF c...
2007,
19.
Abstract:
Mo/Si multilayers were prepared by magnetron sputtering. With different sputtering power of Mo target, surface morphology and crystal phases of Mo/Si multilayers were studied by AFM and XRD. Soft X-ray reflectivity of Mo/Si multilayers were measured....
Mo/Si multilayers were prepared by magnetron sputtering. With different sputtering power of Mo target, surface morphology and crystal phases of Mo/Si multilayers were studied by AFM and XRD. Soft X-ray reflectivity of Mo/Si multilayers were measured....
2007,
19.
Abstract:
Organic polymer foams have many uses in inertial confinement fusion targets and Z-pinch loads. However, many low density foams are not uniform in some extent, which has bad effects on their performance. Two techniques, the beta radiation technology a...
Organic polymer foams have many uses in inertial confinement fusion targets and Z-pinch loads. However, many low density foams are not uniform in some extent, which has bad effects on their performance. Two techniques, the beta radiation technology a...
2007,
19.
Abstract:
A model of a compact wide-band TM01-TE11 mode converter with power capacity more than 1 GW and the maximum dimension of φ20.5 cm×55.2 cm is designed, in which the coaxial TEM and rectangular TE10 modes are used as the intermediate modes. When the fre...
A model of a compact wide-band TM01-TE11 mode converter with power capacity more than 1 GW and the maximum dimension of φ20.5 cm×55.2 cm is designed, in which the coaxial TEM and rectangular TE10 modes are used as the intermediate modes. When the fre...
2007,
19.
Abstract:
A new radial three-cavity structure of the coaxial virtual cathode oscillator is proposed and studied numerically in this paper. Using the radial three-cavity structure, the beam-wave conversion efficiency is enhanced by modulating the E-field in the...
A new radial three-cavity structure of the coaxial virtual cathode oscillator is proposed and studied numerically in this paper. Using the radial three-cavity structure, the beam-wave conversion efficiency is enhanced by modulating the E-field in the...
2007,
19.
Abstract:
This paper introduces the 2 kW continuous wave power combining technique based on TWTs. It mainly proceeds the analysis of the combining efficiency and the factors influencing the conformation of magnitude and phase. A 2 kW power amplifier is designe...
This paper introduces the 2 kW continuous wave power combining technique based on TWTs. It mainly proceeds the analysis of the combining efficiency and the factors influencing the conformation of magnitude and phase. A 2 kW power amplifier is designe...
2007,
19.
Abstract:
During the experiments on electromagnetic pulse (EMP) action utility of micro-electronic components, aimed at three kinds of micro-wave low-noise silicon dynatron transistors, positive EMP (including ESD and square-wave EMP) stresses were injected in...
During the experiments on electromagnetic pulse (EMP) action utility of micro-electronic components, aimed at three kinds of micro-wave low-noise silicon dynatron transistors, positive EMP (including ESD and square-wave EMP) stresses were injected in...
2007,
19.
Abstract:
Applying CST electromagnetic software, using Guass pulse and PML6 boundary condition, the relation between physical structural parameters and performance of the electric-magnetic vibrator combined ultrawideband (UWB) antenna was investigated. The res...
Applying CST electromagnetic software, using Guass pulse and PML6 boundary condition, the relation between physical structural parameters and performance of the electric-magnetic vibrator combined ultrawideband (UWB) antenna was investigated. The res...
2007,
19.
Abstract:
The Cusp electron gun for second harmonic Gyro-TWT is simulated by the three dimensional PIC software and Ukrainion electronic optical software TAU, and the electronic 3D velocity value is extracted to calculate the velocity ratio of the transverse v...
The Cusp electron gun for second harmonic Gyro-TWT is simulated by the three dimensional PIC software and Ukrainion electronic optical software TAU, and the electronic 3D velocity value is extracted to calculate the velocity ratio of the transverse v...
2007,
19.
Abstract:
A pulse constant-current source based on capacitor discharge was developed for LIA accelerator. Theoretic analysis and simulation for this source was proceeded. Numerical simulation has consistent result with experiment. The experiment result shows t...
A pulse constant-current source based on capacitor discharge was developed for LIA accelerator. Theoretic analysis and simulation for this source was proceeded. Numerical simulation has consistent result with experiment. The experiment result shows t...
2007,
19.
Abstract:
A high speed circuit is designed for obtaining the BEPCⅡ bunch fiducial signal based on tunnel diode circuit, monostable multivibrator and ECL logic technology. The bunch train with a gap in storage ring is described. The waveforms of the induced sig...
A high speed circuit is designed for obtaining the BEPCⅡ bunch fiducial signal based on tunnel diode circuit, monostable multivibrator and ECL logic technology. The bunch train with a gap in storage ring is described. The waveforms of the induced sig...
2007,
19.
Abstract:
Based on the merger design theory, the transportation of the merger in PKU-ERL is designed,and the optimized parameters is given which can satisfy the demands of PKU-ERL. The increasements of the emittance and energy spread caused by space charge and...
Based on the merger design theory, the transportation of the merger in PKU-ERL is designed,and the optimized parameters is given which can satisfy the demands of PKU-ERL. The increasements of the emittance and energy spread caused by space charge and...
2007,
19.
Abstract:
From the basic define of the inductance, a new formula to calculate dynamic inductance is deduced, which can figure out the nonlinear inductance of winding with magnetic cores easily by numerical calculation. The dynamic inductances of a pure winding...
From the basic define of the inductance, a new formula to calculate dynamic inductance is deduced, which can figure out the nonlinear inductance of winding with magnetic cores easily by numerical calculation. The dynamic inductances of a pure winding...
2007,
19.
Abstract:
DPF-300 pulsed X-ray source is a mather-type dense plasma focus device and the synchronous triggering of 40 switches is the key of the device. This paper introduces the structural model, principle and performance of the the synchronous trigger system...
DPF-300 pulsed X-ray source is a mather-type dense plasma focus device and the synchronous triggering of 40 switches is the key of the device. This paper introduces the structural model, principle and performance of the the synchronous trigger system...
2007,
19.
Abstract:
The wave process and principle of the transmission line charging in impedance matched and mismatched condition are analyzed. The results show that the impedance mismatched charging technology can realize the power gain but lower the energy efficiency...
The wave process and principle of the transmission line charging in impedance matched and mismatched condition are analyzed. The results show that the impedance mismatched charging technology can realize the power gain but lower the energy efficiency...
2007,
19.
Abstract:
Working principle of magnetic core in linear transformer driver(LTD) was introduced. The influence of the magnetic core’s volt-second product on the output of LTD was deduced by means of simulation. A series of experiments were designed to evaluate t...
Working principle of magnetic core in linear transformer driver(LTD) was introduced. The influence of the magnetic core’s volt-second product on the output of LTD was deduced by means of simulation. A series of experiments were designed to evaluate t...
2007,
19.
Abstract:
To investigate the problem of breakdown between the adjacent turns of the helix pulse forming line (PFL), the influences on the axial electric field of the helix PFL were analyzed numerically. Numerical results indicated that it was easier to breakdo...
To investigate the problem of breakdown between the adjacent turns of the helix pulse forming line (PFL), the influences on the axial electric field of the helix PFL were analyzed numerically. Numerical results indicated that it was easier to breakdo...
2007,
19.
Abstract:
In order to study the impulse voltage distribution in the pulse transformer’s taper windings, experiment was carried out with 3 kinds of single impulse voltage input whose pulse width was 1 μs, 500 ns and 100 ns respectively. Under experimental condi...
In order to study the impulse voltage distribution in the pulse transformer’s taper windings, experiment was carried out with 3 kinds of single impulse voltage input whose pulse width was 1 μs, 500 ns and 100 ns respectively. Under experimental condi...
2007,
19.
Abstract:
The design of strip Blumlein line was presented with the polymer-composite as energy storage dielectric and GaAs-PCSS as circuit switch.The experment results show that relative permittivity of the polymer-composite reaches 80~250, the permittivity an...
The design of strip Blumlein line was presented with the polymer-composite as energy storage dielectric and GaAs-PCSS as circuit switch.The experment results show that relative permittivity of the polymer-composite reaches 80~250, the permittivity an...
2007,
19.
Abstract:
This paper presents the research on transmission and reflection characterization of left-handed materials. It introduces correlative sample patterns and the measuring system. Using high frequency structure simulator(HFSS) method, based on former broa...
This paper presents the research on transmission and reflection characterization of left-handed materials. It introduces correlative sample patterns and the measuring system. Using high frequency structure simulator(HFSS) method, based on former broa...
2007,
19.
Abstract:
An improved 2D finite difference time domain (FDTD) method for TM mode based on the lossy Drude dispersive models is presented. The characteristics of a Gaussian beam propagation through a double negative media(DNG) slab are studied by using the disp...
An improved 2D finite difference time domain (FDTD) method for TM mode based on the lossy Drude dispersive models is presented. The characteristics of a Gaussian beam propagation through a double negative media(DNG) slab are studied by using the disp...
2007,
19.
Abstract:
A device for measuring secondary electron emission yield of insulator was set up successfully, which was made up of electron gun system, vacuum system and electrical system, the energy band of primary current produced by the device was 0.8~60 keV. By...
A device for measuring secondary electron emission yield of insulator was set up successfully, which was made up of electron gun system, vacuum system and electrical system, the energy band of primary current produced by the device was 0.8~60 keV. By...
2007,
19.
Abstract:
Considering recoil of electron, a new theory to explain axial channelling radiation is presented based on Compton scattering of virtual photon with relativistic electron. In the reference system of the electron at rest, the crystal field is taken as ...
Considering recoil of electron, a new theory to explain axial channelling radiation is presented based on Compton scattering of virtual photon with relativistic electron. In the reference system of the electron at rest, the crystal field is taken as ...
2007,
19.
Abstract:
ZnO:Al thin films doped with different aluminum concentration are deposited on(0001) sapphire substrates by the sol-gel technique. Thermal annealing of ZnO thin films is carried out in argon atmosphere from 600 to 950 ℃. The effects of annealing temp...
ZnO:Al thin films doped with different aluminum concentration are deposited on(0001) sapphire substrates by the sol-gel technique. Thermal annealing of ZnO thin films is carried out in argon atmosphere from 600 to 950 ℃. The effects of annealing temp...
