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RSS2013 Vol. 25, No. 04
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2013,
25: 805-806.
Abstract:
A new approach to outputting 2 m light was proposed based on non-critical phase matching KTA-OPO intra-cavity pumped by Nd:YVO4 crystal laser. A signal light with a power exceeding 1 W at 2093 nm is obtained with a diode-to-signal efficiency up to 10...
A new approach to outputting 2 m light was proposed based on non-critical phase matching KTA-OPO intra-cavity pumped by Nd:YVO4 crystal laser. A signal light with a power exceeding 1 W at 2093 nm is obtained with a diode-to-signal efficiency up to 10...
2013,
25: 807-812.
Abstract:
A experiment of laser ablating aluminum target was conducted. A schlieren photography technique was employed for visualizing temporal evolution of detonation waves and analyzing detonation wave attenuation law. Based on similitude theory of shockwave...
A experiment of laser ablating aluminum target was conducted. A schlieren photography technique was employed for visualizing temporal evolution of detonation waves and analyzing detonation wave attenuation law. Based on similitude theory of shockwave...
2013,
25: 813-816.
Abstract:
The density and decay kinetics of a plasma channel produced in air by a self-guided intense femtosecond laser pulse is investigated by numerical simulation method. The two-body, three-body dissociation attachment and the recombination of the free ele...
The density and decay kinetics of a plasma channel produced in air by a self-guided intense femtosecond laser pulse is investigated by numerical simulation method. The two-body, three-body dissociation attachment and the recombination of the free ele...
2013,
25: 817-821.
Abstract:
The strength gradient in bright and dark rings of the non-diffracting Bessel beam for three kinds of different spectral width source (the laser, green LED and white LED sources) is analyzed. The profile of optical intensity distribution in different ...
The strength gradient in bright and dark rings of the non-diffracting Bessel beam for three kinds of different spectral width source (the laser, green LED and white LED sources) is analyzed. The profile of optical intensity distribution in different ...
2013,
25: 822-826.
Abstract:
The Nd:YAG slab end-pumped by laser diode arrays features small thermal effect and wavefront distortion. The theoretical analyses show that inhomogeneity of the temperature field and stress field is the main cause of wavefront distortion in the slab ...
The Nd:YAG slab end-pumped by laser diode arrays features small thermal effect and wavefront distortion. The theoretical analyses show that inhomogeneity of the temperature field and stress field is the main cause of wavefront distortion in the slab ...
2013,
25: 827-831.
Abstract:
A calibration method of fundamental frequency wavelength of space heterodyne spectrometer(SHS) is presented according to the operating principle of SHS and the generation mechanism of interferograms. Pixel phases along the normal direction of interfe...
A calibration method of fundamental frequency wavelength of space heterodyne spectrometer(SHS) is presented according to the operating principle of SHS and the generation mechanism of interferograms. Pixel phases along the normal direction of interfe...
2013,
25: 832-840.
Abstract:
A novel laser model with active gain medium and open-resonator boundary condition was developed, which is applicable to both stable and unstable resonators. Based on the equivalency between the Schrdinger equation and Helmholtz equation, quantum mech...
A novel laser model with active gain medium and open-resonator boundary condition was developed, which is applicable to both stable and unstable resonators. Based on the equivalency between the Schrdinger equation and Helmholtz equation, quantum mech...
2013,
25: 841-846.
Abstract:
Based on the weak guidance approximation, the condition for realizing single mode operation of annular core fiber (ACF) and the energy distribution in far-field are discussed. The theoretical results demonstrate that when an ACF realizes single-mode ...
Based on the weak guidance approximation, the condition for realizing single mode operation of annular core fiber (ACF) and the energy distribution in far-field are discussed. The theoretical results demonstrate that when an ACF realizes single-mode ...
2013,
25: 847-852.
Abstract:
The axial drift of ring laser gyroscopes (RLGs) is a major factor that impacts the performance of the single-axis rotation inertial navigation system. A square support vector machine (SVM) algorithm to forecast the axial RLG drift is proposed in the ...
The axial drift of ring laser gyroscopes (RLGs) is a major factor that impacts the performance of the single-axis rotation inertial navigation system. A square support vector machine (SVM) algorithm to forecast the axial RLG drift is proposed in the ...
2013,
25: 853-857.
Abstract:
Focusing on the random vibration phenomena in infrared video sequences taken from moving vehicles, a BRISK characteristic point matching based high-precision global motion estimation algorithm is proposed. For mismatch in feature point matching and m...
Focusing on the random vibration phenomena in infrared video sequences taken from moving vehicles, a BRISK characteristic point matching based high-precision global motion estimation algorithm is proposed. For mismatch in feature point matching and m...
2013,
25: 858-862.
Abstract:
Due to the random fluctuation of thickness of layers in the deposition process, the robustness of thickness of narrowband filters for far infrared is calculated. The results show that the omnidirectional band gap and the gap ratio of the narrowband f...
Due to the random fluctuation of thickness of layers in the deposition process, the robustness of thickness of narrowband filters for far infrared is calculated. The results show that the omnidirectional band gap and the gap ratio of the narrowband f...
2013,
25: 863-866.
Abstract:
As the gain coefficient of XeF(C-A) blue-green lasers is low, it is difficult to obtain a laser pulse with both high energy and narrow spectrum. In this paper, a dispersive prism is used in the resonator to compress the laser spectrum and to get high...
As the gain coefficient of XeF(C-A) blue-green lasers is low, it is difficult to obtain a laser pulse with both high energy and narrow spectrum. In this paper, a dispersive prism is used in the resonator to compress the laser spectrum and to get high...
2013,
25: 867-871.
Abstract:
The automatic alignment system is a large system that obtains the beam position by processing the images with particular image processing algorithm, and the position information is used to drive the motors and adjust the beam to the specified positio...
The automatic alignment system is a large system that obtains the beam position by processing the images with particular image processing algorithm, and the position information is used to drive the motors and adjust the beam to the specified positio...
2013,
25: 872-874.
Abstract:
Polyvinylidene fluoride (PVDF) patch sensors were pasted beside the laser shock spot to measure the dynamic strain on the 2024 aluminum alloy surface induced by pulse lasers, and then the characteristics of the dynamic strain curves were analyzed. Th...
Polyvinylidene fluoride (PVDF) patch sensors were pasted beside the laser shock spot to measure the dynamic strain on the 2024 aluminum alloy surface induced by pulse lasers, and then the characteristics of the dynamic strain curves were analyzed. Th...
2013,
25: 875-878.
Abstract:
Since the Rb D2 absorption linewidth is much narrower than that of commercially available diode lasers, linewidth reduction of diode laser is one of the key technologies in Rb vapor laser. In this paper, a 40 W laser diode array (LDA) with linewidth ...
Since the Rb D2 absorption linewidth is much narrower than that of commercially available diode lasers, linewidth reduction of diode laser is one of the key technologies in Rb vapor laser. In this paper, a 40 W laser diode array (LDA) with linewidth ...
2013,
25: 879-884.
Abstract:
A method for reverse design of the resonance-domain rectangular-groove dielectric grating based on modal method is presented. The design of the polarization (non-polarization) beam splitter and blazed grating is discussed. As an example, the -1st tra...
A method for reverse design of the resonance-domain rectangular-groove dielectric grating based on modal method is presented. The design of the polarization (non-polarization) beam splitter and blazed grating is discussed. As an example, the -1st tra...
2013,
25: 885-889.
Abstract:
Due to the constraint of thyratron life, thyratron-based excimer lasers are not available in some situation where high repetition rate is desired, such as in the ophthalmic treatment equipment. We designed a solid state pulsed power module (SSPPM) ba...
Due to the constraint of thyratron life, thyratron-based excimer lasers are not available in some situation where high repetition rate is desired, such as in the ophthalmic treatment equipment. We designed a solid state pulsed power module (SSPPM) ba...
2013,
25: 890-894.
Abstract:
The laser induced damage threshold (LIDT) and the particle contaminations of the large-aperture optics such as beam sampling grating (BSG) which is likely to generate stimulated Brillouin scattering, were measured after chemical etching and ultraviol...
The laser induced damage threshold (LIDT) and the particle contaminations of the large-aperture optics such as beam sampling grating (BSG) which is likely to generate stimulated Brillouin scattering, were measured after chemical etching and ultraviol...
2013,
25: 895-897.
Abstract:
Boron carbide films were deposited on Si and Ge substrates using KrF eximer laser. Influences of laser energy, distance between the target and substrate, and bias voltage were studied. A Fourier transform infrared spectroscope and a nano-indenter wer...
Boron carbide films were deposited on Si and Ge substrates using KrF eximer laser. Influences of laser energy, distance between the target and substrate, and bias voltage were studied. A Fourier transform infrared spectroscope and a nano-indenter wer...
2013,
25: 898-902.
Abstract:
A new formula was proposed to investigate the relationship between reaction time and tetraethylorthosilicate (TEOS) conversion rate for preparation of silica sol with Stber method, by studying the reaction kinetics of TEOS hydrolytic process. An appr...
A new formula was proposed to investigate the relationship between reaction time and tetraethylorthosilicate (TEOS) conversion rate for preparation of silica sol with Stber method, by studying the reaction kinetics of TEOS hydrolytic process. An appr...
2013,
25: 903-907.
Abstract:
To meet the requirement of framing diagnosis of CH cylindrical target implosion experiments, a four-channel 4.75 keV KB microscope was developed. The optical structure and imaging quality of the four-channel KB microscope were analyzed. With the size...
To meet the requirement of framing diagnosis of CH cylindrical target implosion experiments, a four-channel 4.75 keV KB microscope was developed. The optical structure and imaging quality of the four-channel KB microscope were analyzed. With the size...
2013,
25: 908-912.
Abstract:
Nanoporous Cu is synthesized by dealloying Mn-Cu precursors with the selective corrosion. The effects of time of heat treatment，the corrosion time and the temperature of dealloying on the porous morphology and the residual Mn content are investigated...
Nanoporous Cu is synthesized by dealloying Mn-Cu precursors with the selective corrosion. The effects of time of heat treatment，the corrosion time and the temperature of dealloying on the porous morphology and the residual Mn content are investigated...
2013,
25: 913-917.
Abstract:
A series of melamine-formaldehyde(MF) organic aerogel templates were prepared with different categories and concentration of catalyst. Their molecular structure, thermal stability and pore structure were tested by Fourier transform infrared spectrosc...
A series of melamine-formaldehyde(MF) organic aerogel templates were prepared with different categories and concentration of catalyst. Their molecular structure, thermal stability and pore structure were tested by Fourier transform infrared spectrosc...
2013,
25: 918-922.
Abstract:
With the increase of capsule requirement, a method for batch characterization of the diameter and sphericity of poly (-methyl styrene) (PAMS) mandrels is developed based on the VMR microscope system. The sources of uncertainty in characterizing the d...
With the increase of capsule requirement, a method for batch characterization of the diameter and sphericity of poly (-methyl styrene) (PAMS) mandrels is developed based on the VMR microscope system. The sources of uncertainty in characterizing the d...
2013,
25: 923-928.
Abstract:
The field reversed configuration(FRC) is a toroidal magnetic confinement system in which a pre-heated and magnetized plasma target can be produced in a -pinch coil. FRC is the main approach to the so-called magnetic target fusion. To understand the p...
The field reversed configuration(FRC) is a toroidal magnetic confinement system in which a pre-heated and magnetized plasma target can be produced in a -pinch coil. FRC is the main approach to the so-called magnetic target fusion. To understand the p...
2013,
25: 929-934.
Abstract:
Single-step and multi-step laser conditioning methods for HfO2/SiO2 multilayer high-reflective (HR) coatings prepared by electron-beam evaporation were introduced, with the use of different beam increment between pulses. In order not to damage the co...
Single-step and multi-step laser conditioning methods for HfO2/SiO2 multilayer high-reflective (HR) coatings prepared by electron-beam evaporation were introduced, with the use of different beam increment between pulses. In order not to damage the co...
2013,
25: 935-939.
Abstract:
Polytetrafluoroethylene(PTFE), polyethylene(PE), polymethyl methacrylate(PMMA) and other similar medium materials are widely used for making of output window of high power microwave(HPM), due to their favorable wave-transparent and mechanical propert...
Polytetrafluoroethylene(PTFE), polyethylene(PE), polymethyl methacrylate(PMMA) and other similar medium materials are widely used for making of output window of high power microwave(HPM), due to their favorable wave-transparent and mechanical propert...
2013,
25: 940-944.
Abstract:
Quantum chaos theory is used to study a reverberation chamber (RC). We evaluate the chaotic characteristics of a numerical RC by analyzing the eigenfrequency spacing distribution with the finite element method. Based on the electromagnetic chaotic fe...
Quantum chaos theory is used to study a reverberation chamber (RC). We evaluate the chaotic characteristics of a numerical RC by analyzing the eigenfrequency spacing distribution with the finite element method. Based on the electromagnetic chaotic fe...
2013,
25: 945-949.
Abstract:
Based on the helical coordinate system, using the approximate field matching method, we studied the high-frequency characteristics of thicker helical slow wave structure, obtained the dispersion equation, and analyzed the influence of the thickness o...
Based on the helical coordinate system, using the approximate field matching method, we studied the high-frequency characteristics of thicker helical slow wave structure, obtained the dispersion equation, and analyzed the influence of the thickness o...
2013,
25: 950-958.
Abstract:
For investigating the mechanism of high power microwave flashover and breakdown on dielectric surface, the theoretical modeling is put forward, including dynamic equations, particle-in-cell method, secondary emission and Monte-Carlo collision between...
For investigating the mechanism of high power microwave flashover and breakdown on dielectric surface, the theoretical modeling is put forward, including dynamic equations, particle-in-cell method, secondary emission and Monte-Carlo collision between...
2013,
25: 959-962.
Abstract:
The paper presents the potential problem in traditional microwave extractor design in the magnetically insulated line oscillator (MILO). Through high frequency electromagnetic simulation, the dependence of TEM mode transmission efficiency on frequenc...
The paper presents the potential problem in traditional microwave extractor design in the magnetically insulated line oscillator (MILO). Through high frequency electromagnetic simulation, the dependence of TEM mode transmission efficiency on frequenc...
2013,
25: 963-967.
Abstract:
In order to evaluate the stirring efficiency in the reverberation chamber under different stirring modes, and improve the accuracy of the measurement, the method for calculating the number of independent samples which is an important indicator is int...
In order to evaluate the stirring efficiency in the reverberation chamber under different stirring modes, and improve the accuracy of the measurement, the method for calculating the number of independent samples which is an important indicator is int...
2013,
25: 968-972.
Abstract:
It is impossible to ignore the influence of S-parameter characteristics in THz folded waveguide slow wave structures. In this paper, the relation between calculated period numbers and S-parameters is considered, the effect of variations of folded wav...
It is impossible to ignore the influence of S-parameter characteristics in THz folded waveguide slow wave structures. In this paper, the relation between calculated period numbers and S-parameters is considered, the effect of variations of folded wav...
2013,
25: 973-976.
Abstract:
Based on twodimensional electromagnetic bandgap (2D EBG) structure, both straight and 90curving waveguide transmission lines working at 0.22 THz were designed. The numerical simulation result shows that the S21 parameters of straight and curving wave...
Based on twodimensional electromagnetic bandgap (2D EBG) structure, both straight and 90curving waveguide transmission lines working at 0.22 THz were designed. The numerical simulation result shows that the S21 parameters of straight and curving wave...
2013,
25: 977-980.
Abstract:
A 100 MeV proton cyclotron, referred to as CYCIAE-100, is designed to provide proton beams with energy up to 200 A. When the cyclotron is under commissioning, a beam dump is required to measure the beam with a power of 20 kW. The paper introduces the...
A 100 MeV proton cyclotron, referred to as CYCIAE-100, is designed to provide proton beams with energy up to 200 A. When the cyclotron is under commissioning, a beam dump is required to measure the beam with a power of 20 kW. The paper introduces the...
2013,
25: 981-984.
Abstract:
IQT files, the spectrum data files of Tektronix real-time spectrum analyzer with special structure are found hardly to manipulate in late experimental data processing. The structure and offline processing of IQT files are analyzed, and the signal con...
IQT files, the spectrum data files of Tektronix real-time spectrum analyzer with special structure are found hardly to manipulate in late experimental data processing. The structure and offline processing of IQT files are analyzed, and the signal con...
2013,
25: 985-988.
Abstract:
For the safety issue for top-up injection, the trajectory of the injection beam was tracked to find out in what kinds of conditions the injection beam would get through the synchrotron light beam pipe and cause radiation hazards. The forward tracking...
For the safety issue for top-up injection, the trajectory of the injection beam was tracked to find out in what kinds of conditions the injection beam would get through the synchrotron light beam pipe and cause radiation hazards. The forward tracking...
2013,
25: 989-993.
Abstract:
A direct plasma injection scheme (DPIS) project has been developed since 2007 at the Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS). In this paper, the test methods and results of radio frequency (RF) characteristics are presente...
A direct plasma injection scheme (DPIS) project has been developed since 2007 at the Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS). In this paper, the test methods and results of radio frequency (RF) characteristics are presente...
2013,
25: 994-1000.
Abstract:
A new accelerator dedicated to hadron therapy, the Heavy-Ion Therapy Facility in Lanzhou (HITFiL), is under construction. As the main accelerator of HITFiL, a heavy-ion synchrotron is designed with special attention paid to compact structure, high re...
A new accelerator dedicated to hadron therapy, the Heavy-Ion Therapy Facility in Lanzhou (HITFiL), is under construction. As the main accelerator of HITFiL, a heavy-ion synchrotron is designed with special attention paid to compact structure, high re...
2013,
25: 1001-1004.
Abstract:
Insertion devices are key components of modern light sources such as Shanghai Synchrotron Radiation Facility (SSRF). The control system of insertion devices is mainly composed of motion control of high precision motor, position feedback, correction c...
Insertion devices are key components of modern light sources such as Shanghai Synchrotron Radiation Facility (SSRF). The control system of insertion devices is mainly composed of motion control of high precision motor, position feedback, correction c...
2013,
25: 1005-1008.
Abstract:
The second medium energy beam transport (MEBT2) line is of great importance in the front-end part of the 1.5 GeV accelerator in the China Accelerator Driven System (CADS) project. In this paper, we describe the design considerations and the beam dyna...
The second medium energy beam transport (MEBT2) line is of great importance in the front-end part of the 1.5 GeV accelerator in the China Accelerator Driven System (CADS) project. In this paper, we describe the design considerations and the beam dyna...
2013,
25: 1009-1012.
Abstract:
The dispersion relation of transverse oscillation in the unmagnetized, collisionless, isotropic and relativistic electronpositron plasma is discussed in the context of q distribution. The dispersion equations in connection with q parameter are derive...
The dispersion relation of transverse oscillation in the unmagnetized, collisionless, isotropic and relativistic electronpositron plasma is discussed in the context of q distribution. The dispersion equations in connection with q parameter are derive...
2013,
25: 1013-1016.
Abstract:
Some techniques of beam profile measurements such as wire rotating scan, Faraday cups array and infrared imagingwere investigated. A measurement device was built based on scintillating screen to cater for the demand of accelerator beam profile diagno...
Some techniques of beam profile measurements such as wire rotating scan, Faraday cups array and infrared imagingwere investigated. A measurement device was built based on scintillating screen to cater for the demand of accelerator beam profile diagno...
2013,
25: 1017-1020.
Abstract:
A self-adaptive identification method is proposed for realizing more accurate and efficient judgment about the inner and outer contours of industrial computed tomography (CT) slice images. The convexity-concavity of the single-pixel-wide closed conto...
A self-adaptive identification method is proposed for realizing more accurate and efficient judgment about the inner and outer contours of industrial computed tomography (CT) slice images. The convexity-concavity of the single-pixel-wide closed conto...
2013,
25: 1021-1025.
Abstract:
The optimized design method based on signal to noise ratio of the image is presented for the object of two-dimensional Gaussian distribution based on the theoretical analysis of the technology of X-ray in-line phase contrast imaging. The imaging syst...
The optimized design method based on signal to noise ratio of the image is presented for the object of two-dimensional Gaussian distribution based on the theoretical analysis of the technology of X-ray in-line phase contrast imaging. The imaging syst...
2013,
25: 1026-1030.
Abstract:
In order to enhance the sensitivity of nuclear material identification system(NMIS) against the change of nuclear material enrichment, the principle of high order statistic feature is introduced and applied to traditional NMIS. We present a new enric...
In order to enhance the sensitivity of nuclear material identification system(NMIS) against the change of nuclear material enrichment, the principle of high order statistic feature is introduced and applied to traditional NMIS. We present a new enric...
2013,
25: 1031-1034.
Abstract:
A coupled algorithm is introduced to simulate the long-term radiation effects of MOSFETs, which combines particle transport with semiconductor governing equations. The former is dealt with Monte-Carlo method, and the latter is solved by finite-volume...
A coupled algorithm is introduced to simulate the long-term radiation effects of MOSFETs, which combines particle transport with semiconductor governing equations. The former is dealt with Monte-Carlo method, and the latter is solved by finite-volume...
2013,
25: 1035-1039.
Abstract:
Position sensitive detectors (PSDs) are an important class of optical sensors which utilizes the lateral photovoltaic effect (LPVE). According to the operation principle of PSD, we demonstrate that LPVE can be enhanced by lengthening the lifetime of ...
Position sensitive detectors (PSDs) are an important class of optical sensors which utilizes the lateral photovoltaic effect (LPVE). According to the operation principle of PSD, we demonstrate that LPVE can be enhanced by lengthening the lifetime of ...
2013,
25: 1040-1044.
Abstract:
The operating principle of stepped transmission lines is introduced, and an ideal rule of output voltage in quasi-Blumlein lines is given. The stepped transmission lines can completely transmit energy and increase the voltage to (n+1)/2 times the inp...
The operating principle of stepped transmission lines is introduced, and an ideal rule of output voltage in quasi-Blumlein lines is given. The stepped transmission lines can completely transmit energy and increase the voltage to (n+1)/2 times the inp...
2013,
25: 1045-1049.
Abstract:
To realize the compatibility of both high power electromagnetic pulse(EMP) protection and signal receiving and transmitting, a new electromagnetic protection structure, i.e. energy selective surface(ESS), is proposed based on energy selective mechani...
To realize the compatibility of both high power electromagnetic pulse(EMP) protection and signal receiving and transmitting, a new electromagnetic protection structure, i.e. energy selective surface(ESS), is proposed based on energy selective mechani...
2013,
25: 1050-1054.
Abstract:
The explosive magnetic flux compression generator (FCG) is a kind of compact pulsed power source with relatively low characteristic impedance. To match the impedance of the generator and the load in kinds of applications, some special power condition...
The explosive magnetic flux compression generator (FCG) is a kind of compact pulsed power source with relatively low characteristic impedance. To match the impedance of the generator and the load in kinds of applications, some special power condition...
2013,
25: 1055-1058.
Abstract:
The radiation generated by gas-gap switches in the process that intense electron beam accelerator is running with pseudo load may cause the computer to be black screen. The mechanism of electromagnetic radiation induced by the triggered spark-gap swi...
The radiation generated by gas-gap switches in the process that intense electron beam accelerator is running with pseudo load may cause the computer to be black screen. The mechanism of electromagnetic radiation induced by the triggered spark-gap swi...
2013,
25: 1059-1062.
Abstract:
A four-gap, rail gas switch for fast linear transformer drivers (LTDs) has been developed to be of low jitter and low inductance, by using four horizontal gaps constructed by rail electrodes. The electric field of the switch and the hold-off voltage ...
A four-gap, rail gas switch for fast linear transformer drivers (LTDs) has been developed to be of low jitter and low inductance, by using four horizontal gaps constructed by rail electrodes. The electric field of the switch and the hold-off voltage ...
2013,
25: 1063-1067.
Abstract:
A nanosecond pulsed power source based on GaAs photoconductive semiconductor switches (PCSSs) and stacked Blumlein line was developed. The pulsed power source consists of four stages of plate Blumlein line, and high-density polyethylene is adopted fo...
A nanosecond pulsed power source based on GaAs photoconductive semiconductor switches (PCSSs) and stacked Blumlein line was developed. The pulsed power source consists of four stages of plate Blumlein line, and high-density polyethylene is adopted fo...
2013,
25: 1068-1072.
Abstract:
In order to reduce the time-domain simulation time of reverberation chamber (RC), this paper investigates the means to predict time-domain responses of RC. A new kind of matrix pencil method (MPM) is proposed based on the modified MPM. Using the prop...
In order to reduce the time-domain simulation time of reverberation chamber (RC), this paper investigates the means to predict time-domain responses of RC. A new kind of matrix pencil method (MPM) is proposed based on the modified MPM. Using the prop...
