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RSS2008 Vol. 20, No. 09
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2008,
20.
Abstract:
A long-pulse TE CO2 laser with ultraviolet-preionization using pulser/sustainer discharge technique is presented. The laser can discharge stably with 14 nF pulser capacitance and 200 nF sustainer capacitance by optimizing the parameters of pulse form...
A long-pulse TE CO2 laser with ultraviolet-preionization using pulser/sustainer discharge technique is presented. The laser can discharge stably with 14 nF pulser capacitance and 200 nF sustainer capacitance by optimizing the parameters of pulse form...
2008,
20.
Abstract:
The liquid crystal spatial light modulator(LCSLM) was used to shape the super-Gaussian seed pulse. The simulation results of the shaping, amplification and compression processes, indicate that the spectrum shaped by liquial crystal spatial light modu...
The liquid crystal spatial light modulator(LCSLM) was used to shape the super-Gaussian seed pulse. The simulation results of the shaping, amplification and compression processes, indicate that the spectrum shaped by liquial crystal spatial light modu...
2008,
20.
Abstract:
The laser pulses with several femtosecond duration close to its natural limit of the wave cycle in the visible spectral range are able to trace chemical processes of molecules. However, probing ultrafast transition process of electrons much faster th...
The laser pulses with several femtosecond duration close to its natural limit of the wave cycle in the visible spectral range are able to trace chemical processes of molecules. However, probing ultrafast transition process of electrons much faster th...
2008,
20.
Abstract:
A scheme is designed to measure the pulsed laser far field energy density based on CCD imaging, and the measurement model mapping the CCD gray value to the pulsed laser energy density on the reflective board is deduced based on radiometry and camera ...
A scheme is designed to measure the pulsed laser far field energy density based on CCD imaging, and the measurement model mapping the CCD gray value to the pulsed laser energy density on the reflective board is deduced based on radiometry and camera ...
2008,
20.
Abstract:
In high power solid-state laser driver, the calibration of reference wavefront is a key technique in the use of adaptive optics system. Based on the optical character of certain laser prototype system, two calibration methods are researched contrasti...
In high power solid-state laser driver, the calibration of reference wavefront is a key technique in the use of adaptive optics system. Based on the optical character of certain laser prototype system, two calibration methods are researched contrasti...
2008,
20.
Abstract:
The evolution of the hot-images caused by multi-scatterers in a plane perpendicular to the axis in high-power laser systems is numerically simulated by taking five parallel equispaced nonlinear medium plates (with gain and loss) as an example. The in...
The evolution of the hot-images caused by multi-scatterers in a plane perpendicular to the axis in high-power laser systems is numerically simulated by taking five parallel equispaced nonlinear medium plates (with gain and loss) as an example. The in...
2008,
20.
Abstract:
The heat dispersion of a cooler which we made was theoretically simulated and the thermal conductivity of the packaging material was analyzed. It was proved the diode laser could operate in high power density and high duty cycle. The key technique fo...
The heat dispersion of a cooler which we made was theoretically simulated and the thermal conductivity of the packaging material was analyzed. It was proved the diode laser could operate in high power density and high duty cycle. The key technique fo...
2008,
20.
Abstract:
The diffraction and near-field-intensity smoothing characteristics of periodic chirp pulse after spectral dispersion in the laser driver of inertial confinement fusion are analyzed theoretically and simulated numerically, and the effect of color cycl...
The diffraction and near-field-intensity smoothing characteristics of periodic chirp pulse after spectral dispersion in the laser driver of inertial confinement fusion are analyzed theoretically and simulated numerically, and the effect of color cycl...
2008,
20.
Abstract:
By using approximate expression of the hard-edge narrow slot aperture function and generalized diffraction formula, an approximate analytical expression of the output field distribution for a Gaussian beam passing through an optical system with a mis...
By using approximate expression of the hard-edge narrow slot aperture function and generalized diffraction formula, an approximate analytical expression of the output field distribution for a Gaussian beam passing through an optical system with a mis...
2008,
20.
Abstract:
An X-ray streak camera system with high dynamic range and a long slit photocathode of 30 mm length has been developed for plasma diagnosis in ICF experimental research. In order to enlarge dynamic range and ensure time resolution at the same time, a ...
An X-ray streak camera system with high dynamic range and a long slit photocathode of 30 mm length has been developed for plasma diagnosis in ICF experimental research. In order to enlarge dynamic range and ensure time resolution at the same time, a ...
2008,
20.
Abstract:
Neutron digital imaging is a low light level imaging technique. It is difficult to extract the quantitative information of samples due to the image degradation caused by scattering neutrons in the imaging process. In this situation, the principle of ...
Neutron digital imaging is a low light level imaging technique. It is difficult to extract the quantitative information of samples due to the image degradation caused by scattering neutrons in the imaging process. In this situation, the principle of ...
2008,
20.
Abstract:
To restrain the space charge effects causing severe broadening of an ultra-short electron pulse with high charge density, a novel method is proposed based on a compensating element. The element is an axisymmetric cylindrical cavity, of which the side...
To restrain the space charge effects causing severe broadening of an ultra-short electron pulse with high charge density, a novel method is proposed based on a compensating element. The element is an axisymmetric cylindrical cavity, of which the side...
2008,
20.
Abstract:
Self-organized nanostructures were observed on the surface of ZnSe crystal after irradiation by a focused beam of a femtosecond Ti: sapphire laser with a repetition rate of 250 kHz. For a linearly polarized femtosecond laser, a periodic nanograting s...
Self-organized nanostructures were observed on the surface of ZnSe crystal after irradiation by a focused beam of a femtosecond Ti: sapphire laser with a repetition rate of 250 kHz. For a linearly polarized femtosecond laser, a periodic nanograting s...
2008,
20.
Abstract:
Interfacial effect on effective optical properties of a granular composite has been investigated, in which spherical particles with graded interfaces are randomly embedded in a host matrix. Under the dilute limit, the effective dielectric coefficient...
Interfacial effect on effective optical properties of a granular composite has been investigated, in which spherical particles with graded interfaces are randomly embedded in a host matrix. Under the dilute limit, the effective dielectric coefficient...
2008,
20.
Abstract:
According to sub-nanosecond laser pulses, an electronic fast-pulse sampling method is put forward based on picosecond pulse transmission line and high speed electronic circuits. The design of strobe pulse generation and high speed sample-holding circ...
According to sub-nanosecond laser pulses, an electronic fast-pulse sampling method is put forward based on picosecond pulse transmission line and high speed electronic circuits. The design of strobe pulse generation and high speed sample-holding circ...
2008,
20.
Abstract:
A 1-D visible radiation diagnostic system is developed to investigate plasma convergence via visible radiation with one-dimensional space and continuous time resolution in wire-array Z-pinch experiments performed on Qiangguang-I facility. The loads u...
A 1-D visible radiation diagnostic system is developed to investigate plasma convergence via visible radiation with one-dimensional space and continuous time resolution in wire-array Z-pinch experiments performed on Qiangguang-I facility. The loads u...
2008,
20.
Abstract:
A non-uniform parameter double-transmission-line model is created to explore the voltage distribution in Tesla-transformer taper windings. With the method of differential approximation, the numerical results are shown that during the charging process...
A non-uniform parameter double-transmission-line model is created to explore the voltage distribution in Tesla-transformer taper windings. With the method of differential approximation, the numerical results are shown that during the charging process...
2008,
20.
Abstract:
Recurrence relations of the initial voltages across the primary capacitor between adjacent pulses are derivated based on the sequence processes of discharge and recharge of the primary capacitor in repetitive mode for a compact accelerator. The equat...
Recurrence relations of the initial voltages across the primary capacitor between adjacent pulses are derivated based on the sequence processes of discharge and recharge of the primary capacitor in repetitive mode for a compact accelerator. The equat...
2008,
20.
Abstract:
A novel transmission curved crystal spectrometer is described for hard Ｘ-ray measurements in the energy range of 10~60 keV. The spectrometer is based on a cylindrical curved quartz crystal. The curvature radius is 112 mm and the spacing of the crysta...
A novel transmission curved crystal spectrometer is described for hard Ｘ-ray measurements in the energy range of 10~60 keV. The spectrometer is based on a cylindrical curved quartz crystal. The curvature radius is 112 mm and the spacing of the crysta...
2008,
20.
Abstract:
Analysis of forces on microshells during ablation layer bounce-coating has been carried out based on the established bouncing and mechanical models. The phenomena, such as the conglutination and unbounce of microshells, the fluctuation of the bounce ...
Analysis of forces on microshells during ablation layer bounce-coating has been carried out based on the established bouncing and mechanical models. The phenomena, such as the conglutination and unbounce of microshells, the fluctuation of the bounce ...
2008,
20.
Abstract:
The monodispersed SiO2 microspheres were synthesized by reactant mixed equally. The colloid crystal templates were assemblied by vertical sedimentation method in ethanol at certain temperatures, and the effects of the heat treatment temperature on th...
The monodispersed SiO2 microspheres were synthesized by reactant mixed equally. The colloid crystal templates were assemblied by vertical sedimentation method in ethanol at certain temperatures, and the effects of the heat treatment temperature on th...
2008,
20.
Abstract:
Two-layer SiO2/ZrO2 thin films were deposited on K9 glass by Sol-Gel dip-coating method. The colloidal suspension of ZrO2 and SiO2 were prepared using Zr(OPr)4 and TEOS as precursors, respectively. For sample 1, the ZrO2 film was directly deposited o...
Two-layer SiO2/ZrO2 thin films were deposited on K9 glass by Sol-Gel dip-coating method. The colloidal suspension of ZrO2 and SiO2 were prepared using Zr(OPr)4 and TEOS as precursors, respectively. For sample 1, the ZrO2 film was directly deposited o...
2008,
20.
Abstract:
A novel bridged silsesquioxane with long bridging groups was synthesized with m-xylylene diisocyanate and 3-aminopropyltriethoxysilane. Bridged polysilsesquioxane sol was prepared by the sol-gel polycondensaion of as-synthesized bridged silsesquioxan...
A novel bridged silsesquioxane with long bridging groups was synthesized with m-xylylene diisocyanate and 3-aminopropyltriethoxysilane. Bridged polysilsesquioxane sol was prepared by the sol-gel polycondensaion of as-synthesized bridged silsesquioxan...
2008,
20.
Abstract:
The foamed copper was synthesized by electrodeposition technique on the basis of electroless copper plating using sodium hypophosphite as reductant. Micro-structure of foamed copper in different phase was characterized by scanning electron microscope...
The foamed copper was synthesized by electrodeposition technique on the basis of electroless copper plating using sodium hypophosphite as reductant. Micro-structure of foamed copper in different phase was characterized by scanning electron microscope...
2008,
20.
Abstract:
The damage behaviors of HfO2/SiO2 high reflective optical thin film fabricated by electron beam evaporation (EBE) illuminated using 1 064 nm laser and 532 nm laser showed some difference. It was found that the damage was usually caused by absorptive ...
The damage behaviors of HfO2/SiO2 high reflective optical thin film fabricated by electron beam evaporation (EBE) illuminated using 1 064 nm laser and 532 nm laser showed some difference. It was found that the damage was usually caused by absorptive ...
2008,
20.
Abstract:
The polarization characeristics of the all fiber front-end for a laser facility prototype were analyzed. According to the polarization control demand of the laser facility prototype, a new method was developed to stablize the polarization of the fibe...
The polarization characeristics of the all fiber front-end for a laser facility prototype were analyzed. According to the polarization control demand of the laser facility prototype, a new method was developed to stablize the polarization of the fibe...
2008,
20.
Abstract:
In ICF experiment, the defects on micro-shells surface will affect the capsule implosion hydrodynamic instabitiy seriously. The relationship between the defects on micro-shell surface and power spectrum was analyzed theoretically and simulated. The r...
In ICF experiment, the defects on micro-shells surface will affect the capsule implosion hydrodynamic instabitiy seriously. The relationship between the defects on micro-shell surface and power spectrum was analyzed theoretically and simulated. The r...
2008,
20.
Abstract:
Fused silica were artificially contaminated to estimate the resistance of fused silica against laser damage. Uniform contamination thin films (less than 10 nm thick) were prepared by sputtering materials(Cu). The loss of transmission of the samples w...
Fused silica were artificially contaminated to estimate the resistance of fused silica against laser damage. Uniform contamination thin films (less than 10 nm thick) were prepared by sputtering materials(Cu). The loss of transmission of the samples w...
2008,
20.
Abstract:
PVA/SiO2 composite antireflective coatings which can be easily removed from glass substrate by hot water were prepared. PVA coatings were first deposited onto K9 glass substrate, followed by SiO2 as the second layer. UV-Vis spectrophotometer, ellipso...
PVA/SiO2 composite antireflective coatings which can be easily removed from glass substrate by hot water were prepared. PVA coatings were first deposited onto K9 glass substrate, followed by SiO2 as the second layer. UV-Vis spectrophotometer, ellipso...
2008,
20.
Abstract:
Deuterated polyethylene films with good transparency and uniform thickness were been prepared using improved solution-casting method. The effects of solution temperature, evaporation temperature, temperature and time of vacuum heating on the thicknes...
Deuterated polyethylene films with good transparency and uniform thickness were been prepared using improved solution-casting method. The effects of solution temperature, evaporation temperature, temperature and time of vacuum heating on the thicknes...
2008,
20.
Abstract:
Coaxial vircator with feedback and beam modulation is designed and studied by theoretical and PIC simulation methods. In the vircator, there are a coaxial resonant cavity that beams pass through and a coupling gap connecting the coaxial resonant cavi...
Coaxial vircator with feedback and beam modulation is designed and studied by theoretical and PIC simulation methods. In the vircator, there are a coaxial resonant cavity that beams pass through and a coupling gap connecting the coaxial resonant cavi...
2008,
20.
Abstract:
The double taper helix slow wave structure is one of the most widely used slow wave structures in space TWT. The effects of parameters such as length and pitch of double-taper helix slow wave structure on the electron efficiency and gain of TWT are i...
The double taper helix slow wave structure is one of the most widely used slow wave structures in space TWT. The effects of parameters such as length and pitch of double-taper helix slow wave structure on the electron efficiency and gain of TWT are i...
2008,
20.
Abstract:
The properties of several materials as explosive emission cathode were studied experimentally on high voltage (0.6~1.0 MV), repetitive (100 Hz) electron accelerator, such as effective emission area, average current density, diode impedance and energy...
The properties of several materials as explosive emission cathode were studied experimentally on high voltage (0.6~1.0 MV), repetitive (100 Hz) electron accelerator, such as effective emission area, average current density, diode impedance and energy...
2008,
20.
Abstract:
A compact high power microwave(HPM) driver using a folded plate Blumlein line is introduced. The folded plate Blumlein line uses Kapton film as the transmission dielectric and pure transformer oil as the insulation medium. The whole size of this Blum...
A compact high power microwave(HPM) driver using a folded plate Blumlein line is introduced. The folded plate Blumlein line uses Kapton film as the transmission dielectric and pure transformer oil as the insulation medium. The whole size of this Blum...
2008,
20.
Abstract:
In order to use the two-bunch acceleration technology to further double the positron injection rate from BEPCII (Beijing Electron Positron Collider Upgrade Project) linac to the storage ring, a pre-injector with two SHBs (Sub-harmonic Buncher) is bei...
In order to use the two-bunch acceleration technology to further double the positron injection rate from BEPCII (Beijing Electron Positron Collider Upgrade Project) linac to the storage ring, a pre-injector with two SHBs (Sub-harmonic Buncher) is bei...
2008,
20.
Abstract:
Theoretical analysis and experiments have been done to find out the factors which decide the self-restoration ability of low remanence magnetic cores. The results show that in the right working circuit, the cores with appropriate pulse permeability c...
Theoretical analysis and experiments have been done to find out the factors which decide the self-restoration ability of low remanence magnetic cores. The results show that in the right working circuit, the cores with appropriate pulse permeability c...
2008,
20.
Abstract:
Aiming at the characteristics of high-energy X-ray industrial computerized tomography(CT), a data transmission system based on USB2.0 was developed. The system consists of a USB2.0 interface and a transmission control unit. The USB20 interface unit ...
Aiming at the characteristics of high-energy X-ray industrial computerized tomography(CT), a data transmission system based on USB2.0 was developed. The system consists of a USB2.0 interface and a transmission control unit. The USB20 interface unit ...
2008,
20.
Abstract:
The prepulse restraining inductance was confirmed to be 5 μH according to the numerical simulation based on the relation of pulse transmitting line voltage，pulse outer line voltage and diode current with inductance value. The method for calculating t...
The prepulse restraining inductance was confirmed to be 5 μH according to the numerical simulation based on the relation of pulse transmitting line voltage，pulse outer line voltage and diode current with inductance value. The method for calculating t...
2008,
20.
Abstract:
Beam diagnositic control system for the heavy-ion cancer therapy project at the Heavy Ion Research Facility in Lanzhou(HIRFL) has been designed and constructed in the Institute of Modern Physics, Chinese Academy of Sciences. The system was developed ...
Beam diagnositic control system for the heavy-ion cancer therapy project at the Heavy Ion Research Facility in Lanzhou(HIRFL) has been designed and constructed in the Institute of Modern Physics, Chinese Academy of Sciences. The system was developed ...
