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RSS2008 Vol. 20, No. 08
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2008,
20.
Abstract:
A designed pulsed power modulator are experimentally studied in single pulse mode and in repetitive mode, respectively. The measured maximum secondary charging voltages of the Tesla transformer are 370 kV and 300 kV in single pulse mode and repetitiv...
A designed pulsed power modulator are experimentally studied in single pulse mode and in repetitive mode, respectively. The measured maximum secondary charging voltages of the Tesla transformer are 370 kV and 300 kV in single pulse mode and repetitiv...
2008,
20.
Abstract:
A magnetic pulse compression system which does not contain external remagnetization circuits commonly used in magnetic compressors is presented. Principle of operation for the compressor is described. Simulation of pulse compressor working on a 500 Ω...
A magnetic pulse compression system which does not contain external remagnetization circuits commonly used in magnetic compressors is presented. Principle of operation for the compressor is described. Simulation of pulse compressor working on a 500 Ω...
2008,
20.
Abstract:
The beam kicker system is a key part for beam extraction and injection in ring-like accelerator, which works under high voltage and huge current. This paper introduces the kicker control system based on ARM + DSP + FPGA for CSR project in Lanzhou, wh...
The beam kicker system is a key part for beam extraction and injection in ring-like accelerator, which works under high voltage and huge current. This paper introduces the kicker control system based on ARM + DSP + FPGA for CSR project in Lanzhou, wh...
2008,
20.
Abstract:
The formation and evolution of oxygen vacancies in ZnO white paint during exposure to less than 200 keV protons were investigated in terms of photoluminescence spectroscopy and X-ray photoelectron spectroscopy (XPS). The decreases of lattice oxygen a...
The formation and evolution of oxygen vacancies in ZnO white paint during exposure to less than 200 keV protons were investigated in terms of photoluminescence spectroscopy and X-ray photoelectron spectroscopy (XPS). The decreases of lattice oxygen a...
2008,
20.
Abstract:
Radiography is one application of the hard X-ray derived from ultra-short ultra-intense(US-UI) laser-matter interactions. Experiments about hard X-ray production from US-UI laser interaction with high-Z metal targets, on SILEX-Ⅰ laser facility at Nat...
Radiography is one application of the hard X-ray derived from ultra-short ultra-intense(US-UI) laser-matter interactions. Experiments about hard X-ray production from US-UI laser interaction with high-Z metal targets, on SILEX-Ⅰ laser facility at Nat...
2008,
20.
Abstract:
Based on Stillinger-Weber(SW) potential and “x-section” model, femtosecond laser ablation of monocrystalline silicon was simulated using molecular dynamics method. Snapshots of ablation process were obtained which showed that the emergence and develo...
Based on Stillinger-Weber(SW) potential and “x-section” model, femtosecond laser ablation of monocrystalline silicon was simulated using molecular dynamics method. Snapshots of ablation process were obtained which showed that the emergence and develo...
2008,
20.
Abstract:
Scintillator arrays are used in radiation image detection generally. A relative correction method was proposed based on the severe photoresponse nonuniformity of scintillator arrays. The attenuation distribution of the detected object to γ-ray could...
Scintillator arrays are used in radiation image detection generally. A relative correction method was proposed based on the severe photoresponse nonuniformity of scintillator arrays. The attenuation distribution of the detected object to γ-ray could...
2008,
20.
Abstract:
Cut-off energy of proton accelerated in experiment on SILEX-I is estimated, according to the front mechanism and rear side mechanism of interaction between ultrashort ultra-intense laser and solid target. The estimation according to the rear side mec...
Cut-off energy of proton accelerated in experiment on SILEX-I is estimated, according to the front mechanism and rear side mechanism of interaction between ultrashort ultra-intense laser and solid target. The estimation according to the rear side mec...
2008,
20.
Abstract:
In order to increase the pumping efficiency of pyrotechnically pumped laser, a method was presented to increase the burning rate and improve the irradiance ability of pyrotechnic agent. The new compositions were designed to replace Al-Mg alloy powder...
In order to increase the pumping efficiency of pyrotechnically pumped laser, a method was presented to increase the burning rate and improve the irradiance ability of pyrotechnic agent. The new compositions were designed to replace Al-Mg alloy powder...
2008,
20.
Abstract:
To achieve the simulation for IR detection of spatial targets, analysis and analogy calculation of the temperature field of the target in spa is needed. One of the most important boundary condition is the surface material natural parameters of target...
To achieve the simulation for IR detection of spatial targets, analysis and analogy calculation of the temperature field of the target in spa is needed. One of the most important boundary condition is the surface material natural parameters of target...
2008,
20.
Abstract:
Based on Boltzmann distribution law which is the derived distribution characteristic of electrons by potential energy in a conservative field from Boltzmann integrally differential equation in equilibrium state, the distribution functions of volume c...
Based on Boltzmann distribution law which is the derived distribution characteristic of electrons by potential energy in a conservative field from Boltzmann integrally differential equation in equilibrium state, the distribution functions of volume c...
2008,
20.
Abstract:
The optical diagnostics of annulus-flat water switch in “Qiangguang-Ⅰ” facility was carried out utilizing optical framing camera and fiber sensor. The images of the discharging channels and the irradiance intensity signal during charging stage were a...
The optical diagnostics of annulus-flat water switch in “Qiangguang-Ⅰ” facility was carried out utilizing optical framing camera and fiber sensor. The images of the discharging channels and the irradiance intensity signal during charging stage were a...
2008,
20.
Abstract:
The primary power supply of repetitive pulsed intense current accelerator charged by capacitance of energy store is studied. The principle of primary power supply circuit and its time diagram of switches are presented. The circuit is analyzed and som...
The primary power supply of repetitive pulsed intense current accelerator charged by capacitance of energy store is studied. The principle of primary power supply circuit and its time diagram of switches are presented. The circuit is analyzed and som...
2008,
20.
Abstract:
A model based on the open-circuit voltage formula of the PV-type detector, which is derived from the driftdiffusion model under the steady-condition approximation, is used to calculate the responses of PV-type HgCdTe detector under laser irradiation...
A model based on the open-circuit voltage formula of the PV-type detector, which is derived from the driftdiffusion model under the steady-condition approximation, is used to calculate the responses of PV-type HgCdTe detector under laser irradiation...
2008,
20.
Abstract:
The efficiency of Nd:YAG laser raster scanning conditioning of optics was investigated. The existence of intensity and pointing fluctuations of laser beam would lead to descending of laser conditioning efficiency. It was also found that the fluctuati...
The efficiency of Nd:YAG laser raster scanning conditioning of optics was investigated. The existence of intensity and pointing fluctuations of laser beam would lead to descending of laser conditioning efficiency. It was also found that the fluctuati...
2008,
20.
Abstract:
A mathematic model of the laser diode array(LDA) side-pump composite crystal Nd:YAG/YAG disk laser is set up：LDA fast axis is upright to disk face and micro lens collimate the fast axis. Far-field divergence angle of the slow axis is calculated and s...
A mathematic model of the laser diode array(LDA) side-pump composite crystal Nd:YAG/YAG disk laser is set up：LDA fast axis is upright to disk face and micro lens collimate the fast axis. Far-field divergence angle of the slow axis is calculated and s...
2008,
20.
Abstract:
A detecting module for measuring power density of mid-infrared laser is developed using room temperature HgCdTe photoconductor detector. The module is consisted of optic filter attenuator, HgCdTe detector, amplifier, analog to digital converter, and ...
A detecting module for measuring power density of mid-infrared laser is developed using room temperature HgCdTe photoconductor detector. The module is consisted of optic filter attenuator, HgCdTe detector, amplifier, analog to digital converter, and ...
2008,
20.
Abstract:
If the angle between the orientation of the interference fringes and the detector’s coordinate axis varies, the four quadrant units may detect different intensity distributions because of their quadrant characteristics, and the intensity of each quad...
If the angle between the orientation of the interference fringes and the detector’s coordinate axis varies, the four quadrant units may detect different intensity distributions because of their quadrant characteristics, and the intensity of each quad...
2008,
20.
Abstract:
For improving the beam quality, the application of cube corners reflector was studied. The cube corners reflector was used as the cavity mirror, with use of the quasi-phase conjugation characteristics of the cube corners, the wave-front aberration of...
For improving the beam quality, the application of cube corners reflector was studied. The cube corners reflector was used as the cavity mirror, with use of the quasi-phase conjugation characteristics of the cube corners, the wave-front aberration of...
2008,
20.
Abstract:
For the gas concentration measurement system based on the tunable diodelaser absorption technique spectroscopy (TDLAS), a state-space strategy has been proposed. The proposed strategy formulates the gas concentration distribution through the state e...
For the gas concentration measurement system based on the tunable diodelaser absorption technique spectroscopy (TDLAS), a state-space strategy has been proposed. The proposed strategy formulates the gas concentration distribution through the state e...
2008,
20.
Abstract:
In order to make the grazing incidence XUV flat-field spectrograph’s size shorter for the convenience of use, a ray-tracing code is set to research the influence of the concave grating’s parameter on the spectrum imaging when the incident distance is...
In order to make the grazing incidence XUV flat-field spectrograph’s size shorter for the convenience of use, a ray-tracing code is set to research the influence of the concave grating’s parameter on the spectrum imaging when the incident distance is...
2008,
20.
Abstract:
3D simulation scene is obtained according to formulae of target and background luminance and 3D graphics software. Based on the simulation scene, tracking and identifying process of dynamic laser beam pointing system is studied. Several errors in tra...
3D simulation scene is obtained according to formulae of target and background luminance and 3D graphics software. Based on the simulation scene, tracking and identifying process of dynamic laser beam pointing system is studied. Several errors in tra...
2008,
20.
Abstract:
In the spectrometer, a cone, used to mount eight multilayer-mirrors, was combined with a central collimation device to obtain the required angles of multilayer-mirrors. Therefore the system could be collimated easily as a whole. 3-D model of the spec...
In the spectrometer, a cone, used to mount eight multilayer-mirrors, was combined with a central collimation device to obtain the required angles of multilayer-mirrors. Therefore the system could be collimated easily as a whole. 3-D model of the spec...
2008,
20.
Abstract:
In order to compensate for the nonsphericalsymmetric heat flux in the hohlraum, auxiliary heating is usually applied to the outside wall of the hohlraum during the cooling process. A one-dimensional heat exchange theoretical model has been proposed i...
In order to compensate for the nonsphericalsymmetric heat flux in the hohlraum, auxiliary heating is usually applied to the outside wall of the hohlraum during the cooling process. A one-dimensional heat exchange theoretical model has been proposed i...
Measurement of growth kinetics of KDP prismatic faces with laser-polarization-interference technique
2008,
20.
Abstract:
The normal growth rate of KDP prismatic faces was measured in real time using laser- polarization- interference technique. Effect of supersaturation control on the real time measurement of dead zone of KDP prismatic faces was studied. It was found th...
The normal growth rate of KDP prismatic faces was measured in real time using laser- polarization- interference technique. Effect of supersaturation control on the real time measurement of dead zone of KDP prismatic faces was studied. It was found th...
2008,
20.
Abstract:
Laser beam automatic alignment systems are used to precisely adjust beam lines automatically in the high power laser facility. Based on a laser prototype facility requirement for aligning the cavity mirror, the edge characters of light are quantitati...
Laser beam automatic alignment systems are used to precisely adjust beam lines automatically in the high power laser facility. Based on a laser prototype facility requirement for aligning the cavity mirror, the edge characters of light are quantitati...
2008,
20.
Abstract:
The large-aperture interferometer can not be regarded as shift-invariant linear imaging systems since for it has different forms of point-spread function at different field positions. It is necessary to revise the calibration of system transfer funct...
The large-aperture interferometer can not be regarded as shift-invariant linear imaging systems since for it has different forms of point-spread function at different field positions. It is necessary to revise the calibration of system transfer funct...
2008,
20.
Abstract:
Magnetic ICF glass targets were prepared by electroless plating technology in which magnetic Ni-P coatings covered the surfaces of ICF glass targets. The effects of mass density of main salt, mass density of reducer, mass density of complexant, tempe...
Magnetic ICF glass targets were prepared by electroless plating technology in which magnetic Ni-P coatings covered the surfaces of ICF glass targets. The effects of mass density of main salt, mass density of reducer, mass density of complexant, tempe...
2008,
20.
Abstract:
Many parameters of plasma, such as electron temperature and ion density can be calculated according to the voltage-curren characteristics curve measured by Langmuir probe. A plasma scanning power system and a data acquisition system are applied in th...
Many parameters of plasma, such as electron temperature and ion density can be calculated according to the voltage-curren characteristics curve measured by Langmuir probe. A plasma scanning power system and a data acquisition system are applied in th...
2008,
20.
Abstract:
The stress and adhesion of YbF3 thin film deposited by thermal evaporation have been investigated. The stresses of singlelayer YbF3 thin films at different technical conditions have been evaluated by using a Veeco interferometer. In our experiment, r...
The stress and adhesion of YbF3 thin film deposited by thermal evaporation have been investigated. The stresses of singlelayer YbF3 thin films at different technical conditions have been evaluated by using a Veeco interferometer. In our experiment, r...
2008,
20.
Abstract:
The relation of sampling principle to secondary phase sampling problem is analyzed. Based on Fresnel diffraction principle, the computation method for non-focal position is deduced, a new method, the equivalent source field method, is proposed to reb...
The relation of sampling principle to secondary phase sampling problem is analyzed. Based on Fresnel diffraction principle, the computation method for non-focal position is deduced, a new method, the equivalent source field method, is proposed to reb...
2008,
20.
Abstract:
As one of the most important feartures of CCD, linearity can have great influence on data analysis especially in the region of quantitative calculations. The experimental research on the linearity slope and nonlinear scale of scientific optical CCD r...
As one of the most important feartures of CCD, linearity can have great influence on data analysis especially in the region of quantitative calculations. The experimental research on the linearity slope and nonlinear scale of scientific optical CCD r...
2008,
20.
Abstract:
Numerical simulations are conducted on the THz radiation excited from the laserplasma interaction with the help of 2D3V PIC code. A new scheme using multiple laser pulses to enhance the THz radiation is proposed, and the effects of pulse number(1~4)...
Numerical simulations are conducted on the THz radiation excited from the laserplasma interaction with the help of 2D3V PIC code. A new scheme using multiple laser pulses to enhance the THz radiation is proposed, and the effects of pulse number(1~4)...
2008,
20.
Abstract:
A fast semi-empirical and semi-analytical method for shielding efficiency (or coupling efficiency) estimation of slot with large length-width ratio is presented. The method is based on coupling theory of small holes and Green’s functions of rectangul...
A fast semi-empirical and semi-analytical method for shielding efficiency (or coupling efficiency) estimation of slot with large length-width ratio is presented. The method is based on coupling theory of small holes and Green’s functions of rectangul...
2008,
20.
Abstract:
With the 2.5D full electromagnetic particle-in-cell code, an S-band inductively-loaded wide-gap cavity relativistic klystron amplifier is proposed and investigated. The effects of the washers/rods parameters on intense relativistic electron beam modu...
With the 2.5D full electromagnetic particle-in-cell code, an S-band inductively-loaded wide-gap cavity relativistic klystron amplifier is proposed and investigated. The effects of the washers/rods parameters on intense relativistic electron beam modu...
2008,
20.
Abstract:
The thermal distortion effect of resonator mirror in high power gas lasers was investigated. In terms of the method of time discreteness, a 3D physical optic loaded model for folded confocal unstable resonators in negative branch and ANSYS models for...
The thermal distortion effect of resonator mirror in high power gas lasers was investigated. In terms of the method of time discreteness, a 3D physical optic loaded model for folded confocal unstable resonators in negative branch and ANSYS models for...
2008,
20.
Abstract:
A coaxial reflex triode oscillator for high power microwave generation is proposed and studied by numerical simulation. In the proposed oscillator, a small cylindrical conductor is added on the cathode along the centreline. Thus electric gradient is ...
A coaxial reflex triode oscillator for high power microwave generation is proposed and studied by numerical simulation. In the proposed oscillator, a small cylindrical conductor is added on the cathode along the centreline. Thus electric gradient is ...
2008,
20.
Abstract:
This paper has introduced the development of the transverse bunch-by-bunch measurement and feedback system, including the experiment of damping the coupled bunch instability. Some key technologies on the system have been introduced: the vector calcul...
This paper has introduced the development of the transverse bunch-by-bunch measurement and feedback system, including the experiment of damping the coupled bunch instability. Some key technologies on the system have been introduced: the vector calcul...
2008,
20.
Abstract:
The RF design of a 201.25 MHz, 750 keV RFQ injector is described. A four-rod structure is chosen for the RF design. The essential parameters are obtained from the beam dynamics design. The structure parameters, including the height, width, thickness,...
The RF design of a 201.25 MHz, 750 keV RFQ injector is described. A four-rod structure is chosen for the RF design. The essential parameters are obtained from the beam dynamics design. The structure parameters, including the height, width, thickness,...
