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RSS2006 Vol. 18, No. 09
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2006,
18.
Abstract:
A high-power linearly polarized CW diode-side-pumped Nd:YAlO3(Nd:YAP) laser oscillating at 1 341.4 nm was reported. By analyzing the level structure and characteristics of transition in Nd:YAP crystal, the advantages of Nd:YAP crystal as a kind of w...
A high-power linearly polarized CW diode-side-pumped Nd:YAlO3(Nd:YAP) laser oscillating at 1 341.4 nm was reported. By analyzing the level structure and characteristics of transition in Nd:YAP crystal, the advantages of Nd:YAP crystal as a kind of w...
2006,
18.
Abstract:
The influence of the excitation spot area and the scatter concentration on the laser threshold were investigated in the TiO2/Rhodamine B gain media. Frequency-doubled output of a mode-locked Nd:YAG laser(20 Hz repetition rate, 6 ns pulse width) was u...
The influence of the excitation spot area and the scatter concentration on the laser threshold were investigated in the TiO2/Rhodamine B gain media. Frequency-doubled output of a mode-locked Nd:YAG laser(20 Hz repetition rate, 6 ns pulse width) was u...
2006,
18.
Abstract:
The time independent rate equations for fiber amplifier were solved by average inversion ratio iteration method. In this paper, a novel arithmetic based on genetic algorithm was proposed to optimize the distributed pump powers and the lengths of fibe...
The time independent rate equations for fiber amplifier were solved by average inversion ratio iteration method. In this paper, a novel arithmetic based on genetic algorithm was proposed to optimize the distributed pump powers and the lengths of fibe...
2006,
18.
Abstract:
Considering inhomogeneous heat generation and real heat-transfer conditions, the transient temperature and thermal stress distribution in disk of heat capacity laser pumped by high power LDA are simulated and analyzed by use of finite element methods...
Considering inhomogeneous heat generation and real heat-transfer conditions, the transient temperature and thermal stress distribution in disk of heat capacity laser pumped by high power LDA are simulated and analyzed by use of finite element methods...
2006,
18.
Abstract:
The theory of non-Kolmogorov turbulence and the method to measure the scaling exponent of power spectrum are introduced. The experimental investigations of temperature fluctuation near the ground have been conducted in many places. The results show t...
The theory of non-Kolmogorov turbulence and the method to measure the scaling exponent of power spectrum are introduced. The experimental investigations of temperature fluctuation near the ground have been conducted in many places. The results show t...
2006,
18.
Abstract:
A new way to control the active lap by CMAC (cerebellar model articulation controller) neural network is put forward, based on the controlling system features of nonlinear and muti-variables. Using parameters of lap surface as input variables, pulse ...
A new way to control the active lap by CMAC (cerebellar model articulation controller) neural network is put forward, based on the controlling system features of nonlinear and muti-variables. Using parameters of lap surface as input variables, pulse ...
2006,
18.
Abstract:
Stimulated Raman scattering(SRS) and thermal effect can limit the power scaling of fiber laser. According to rate equations and heat conduction equations, SRS and thermal effect in high power Yb3+ doped double clad fiber laser are studied for two-end...
Stimulated Raman scattering(SRS) and thermal effect can limit the power scaling of fiber laser. According to rate equations and heat conduction equations, SRS and thermal effect in high power Yb3+ doped double clad fiber laser are studied for two-end...
2006,
18.
Abstract:
The quality of pulsed Nd:YAG laser cladding depends on the voltage, electric current, pulse length, pulse frequency, scanning speed, and beam diameter of the Nd:YAG laser. In order to fully conside the effect of these processing parameters and simpli...
The quality of pulsed Nd:YAG laser cladding depends on the voltage, electric current, pulse length, pulse frequency, scanning speed, and beam diameter of the Nd:YAG laser. In order to fully conside the effect of these processing parameters and simpli...
2006,
18.
Abstract:
Based on the nonlinear optics, the theoretical basis of 589 nm laser frequency-summed by 1 064 nm and 1 319 nm laser was analyzed. Phase-matching factor and optimum length of lithium triborate (LBO) crystal were numerically simulated and the correspo...
Based on the nonlinear optics, the theoretical basis of 589 nm laser frequency-summed by 1 064 nm and 1 319 nm laser was analyzed. Phase-matching factor and optimum length of lithium triborate (LBO) crystal were numerically simulated and the correspo...
2006,
18.
Abstract:
A method to determine the atmospheric aerosol model from the spectral relationships of aerosol optical thickness was presented in this paper. The atmospheric aerosol optical thickness were computed by 6S atmospheric radiative transfer model at multip...
A method to determine the atmospheric aerosol model from the spectral relationships of aerosol optical thickness was presented in this paper. The atmospheric aerosol optical thickness were computed by 6S atmospheric radiative transfer model at multip...
2006,
18.
Abstract:
Based on the temporal covariance of logarithmic amplitude, analytical expression was obtained for power spectrum of atmospheric scintillation with aperture receiving in the weak fluctuation regime. The effect of the receiving aperture on the power sp...
Based on the temporal covariance of logarithmic amplitude, analytical expression was obtained for power spectrum of atmospheric scintillation with aperture receiving in the weak fluctuation regime. The effect of the receiving aperture on the power sp...
2006,
18.
Abstract:
By simulating amplitude and phase fluctuations induced by atmospheric turbulence, signal fading for coupling space light into single mode fiber is studied in wavefront tip-tilt corrected system. Tracking algorithm of CCD image is studied. Simulation ...
By simulating amplitude and phase fluctuations induced by atmospheric turbulence, signal fading for coupling space light into single mode fiber is studied in wavefront tip-tilt corrected system. Tracking algorithm of CCD image is studied. Simulation ...
2006,
18.
Abstract:
Phase conjugation technology with liquid CH3COCH3 as medium to improve beam quality in double-pass amplifier laser system is experimentally investigated. The results operating at 400 Hz repetition rate show that the thermal effects of the liquid medi...
Phase conjugation technology with liquid CH3COCH3 as medium to improve beam quality in double-pass amplifier laser system is experimentally investigated. The results operating at 400 Hz repetition rate show that the thermal effects of the liquid medi...
2006,
18.
Abstract:
When Hartmann-Shack sensor was assembled with lens array and CCD, the assembly error was produced inevitably. It would greatly reduce the precision of the wavefront measurement. Two types of assembly error of Hartmann-Shack sensor were analyzed and e...
When Hartmann-Shack sensor was assembled with lens array and CCD, the assembly error was produced inevitably. It would greatly reduce the precision of the wavefront measurement. Two types of assembly error of Hartmann-Shack sensor were analyzed and e...
2006,
18.
Abstract:
This paper theoretically and experimentally investigated the physical process of fast Z-pinch implosion and radiation, carried through 1 D, 2 D radiation magneto-hydrodynamics codes. A series of experimental studies were expanded on facilities of S-3...
This paper theoretically and experimentally investigated the physical process of fast Z-pinch implosion and radiation, carried through 1 D, 2 D radiation magneto-hydrodynamics codes. A series of experimental studies were expanded on facilities of S-3...
2006,
18.
Abstract:
WO3 / polystyrene nanocomposite has been prepared by on-line sonochemical irradiation of an N, N-dimethyll-formamide solution of polystyrene and W(CO)5. WO3 particle sizes are from 20 nm to 50 nm and WO3 particles are distributed evenly throughout po...
WO3 / polystyrene nanocomposite has been prepared by on-line sonochemical irradiation of an N, N-dimethyll-formamide solution of polystyrene and W(CO)5. WO3 particle sizes are from 20 nm to 50 nm and WO3 particles are distributed evenly throughout po...
2006,
18.
Abstract:
The stimulated Brillouin scattering (SBS) medium hexachlorobuta-1,3-diene (C4Cl6) with little absorption coefficient is studied in terms of the absorption theory of medium to the light. Through basic physical parameters, the SBS parameters of C4Cl6 w...
The stimulated Brillouin scattering (SBS) medium hexachlorobuta-1,3-diene (C4Cl6) with little absorption coefficient is studied in terms of the absorption theory of medium to the light. Through basic physical parameters, the SBS parameters of C4Cl6 w...
2006,
18.
Abstract:
ZrO2 sol was obtained by using hydrothermal synthesis. Thin ZrO2 films and ZrO2-PVP composite films were prepared with spin coating method. Both the ZrO2 films and ZrO2-PVP composite films were characterized by ellipsometer, FTIR, AFM respectively. T...
ZrO2 sol was obtained by using hydrothermal synthesis. Thin ZrO2 films and ZrO2-PVP composite films were prepared with spin coating method. Both the ZrO2 films and ZrO2-PVP composite films were characterized by ellipsometer, FTIR, AFM respectively. T...
2006,
18.
Abstract:
The high energy density self-healing metallized film pulse capacitor has been applied to all kinds of laser facilities for their power conditioning systems, whose reliability and expense are straightforwardly affected by the reliability level of capa...
The high energy density self-healing metallized film pulse capacitor has been applied to all kinds of laser facilities for their power conditioning systems, whose reliability and expense are straightforwardly affected by the reliability level of capa...
2006,
18.
Abstract:
Based on the classical electromagnetic radiation theory, the spectral characteristics of 90° linear Thomson scattering with linearly polarized few-cycle laser pulses were obtained. The research results showed that the fewer the cycle number of the fe...
Based on the classical electromagnetic radiation theory, the spectral characteristics of 90° linear Thomson scattering with linearly polarized few-cycle laser pulses were obtained. The research results showed that the fewer the cycle number of the fe...
2006,
18.
Abstract:
For uniform irradiation in ICF, a non-contact target is the key technology. A magnetic suspension system is one of the best ways. In this paper a magnetic suspension system is primarily designed and a phase-lead controller operating in the inner loop...
For uniform irradiation in ICF, a non-contact target is the key technology. A magnetic suspension system is one of the best ways. In this paper a magnetic suspension system is primarily designed and a phase-lead controller operating in the inner loop...
2006,
18.
Abstract:
In fast ignition mode by exploding push, the fuel is first compressed by a conventional inertial confinement fusion driver, producing a low density hotspot surrounded by a relatively cold and dense main fuel region, and then a short (about 10 ps) pul...
In fast ignition mode by exploding push, the fuel is first compressed by a conventional inertial confinement fusion driver, producing a low density hotspot surrounded by a relatively cold and dense main fuel region, and then a short (about 10 ps) pul...
2006,
18.
Abstract:
This paper introduces fabrication of polystyrene and aluminum surface perturbation targets used for flank illumination Rayleigh-Taylor instability experiment. By figure transfer, incising targets, controlling constructional technique and measuring ta...
This paper introduces fabrication of polystyrene and aluminum surface perturbation targets used for flank illumination Rayleigh-Taylor instability experiment. By figure transfer, incising targets, controlling constructional technique and measuring ta...
2006,
18.
Abstract:
The monolayer water soluble thiol pretected cluster is doped in the agar-gelatin complex foam target materials. The TEM photographes indicate that, after doping, the density along axial direction of the complex foam is uniform and the microstructure ...
The monolayer water soluble thiol pretected cluster is doped in the agar-gelatin complex foam target materials. The TEM photographes indicate that, after doping, the density along axial direction of the complex foam is uniform and the microstructure ...
2006,
18.
Abstract:
Problems in the electro-optical system in high peak power multi-beam klystrons are analyzed. The electro-optical system of an S-band 50 MW klystron is designed by using an indirect method. Respective shield barrels are used to generate side-symmetric...
Problems in the electro-optical system in high peak power multi-beam klystrons are analyzed. The electro-optical system of an S-band 50 MW klystron is designed by using an indirect method. Respective shield barrels are used to generate side-symmetric...
2006,
18.
Abstract:
An electromagnetic topological model used to analyze the interaction of the different electrical components is presented. Combining this model with the algorithm which may find the kth shortest path, an algorithm that can find the paths whose shieldi...
An electromagnetic topological model used to analyze the interaction of the different electrical components is presented. Combining this model with the algorithm which may find the kth shortest path, an algorithm that can find the paths whose shieldi...
2006,
18.
Abstract:
The receiving electric fields of the slot antenna array with different element number and different adjcent element spacing were measured using self-built time domain measurement system. The time domain waveform, normalized energy pattern and normali...
The receiving electric fields of the slot antenna array with different element number and different adjcent element spacing were measured using self-built time domain measurement system. The time domain waveform, normalized energy pattern and normali...
2006,
18.
Abstract:
This paper presents the results from simulative and experimental studies of backward wave oscillator(BWO) with resonant reflector operating at low magnetic field. The influence of drift tube length between the resonant reflector and the slow wave str...
This paper presents the results from simulative and experimental studies of backward wave oscillator(BWO) with resonant reflector operating at low magnetic field. The influence of drift tube length between the resonant reflector and the slow wave str...
2006,
18.
Abstract:
Studying the high frequency properties of serpentine circular groove guide slow wave structure (SWS), the dispersion curves and interaction impedance are obtained by theoretic analysis and numerical computation. It is analyzed that the change of the ...
Studying the high frequency properties of serpentine circular groove guide slow wave structure (SWS), the dispersion curves and interaction impedance are obtained by theoretic analysis and numerical computation. It is analyzed that the change of the ...
2006,
18.
Abstract:
A novel photonic-band-gap(PBG) Vlasov antenna is designed. The antenna is surrounded by a metallic PBG structure which is formed by square arrays of metal posts. The lowest global band gap of the two-dimensional PBG structure is determined numericall...
A novel photonic-band-gap(PBG) Vlasov antenna is designed. The antenna is surrounded by a metallic PBG structure which is formed by square arrays of metal posts. The lowest global band gap of the two-dimensional PBG structure is determined numericall...
2006,
18.
Abstract:
The iterative formulas in Vaughan’s iterative method are discussed and more logical ones are proposed. This improved iterative synthesis method will never be limited to the convergent Pierce electron guns with low convergence or the initial value of ...
The iterative formulas in Vaughan’s iterative method are discussed and more logical ones are proposed. This improved iterative synthesis method will never be limited to the convergent Pierce electron guns with low convergence or the initial value of ...
2006,
18.
Abstract:
The microwave radiation effects on a personal computer are investigated experimentally in the frequency range from 1.2 to 2.0 GHz. The microwave power threshold for the computer to be crashed is studied under various microwave carrier frequencies, mo...
The microwave radiation effects on a personal computer are investigated experimentally in the frequency range from 1.2 to 2.0 GHz. The microwave power threshold for the computer to be crashed is studied under various microwave carrier frequencies, mo...
2006,
18.
Abstract:
A new method to calculate the equivalent relative dielectric constant of the dielectric loaded ring-plane slow-wave structure is proposed. Expressions of dispersion equation and interaction impedance are derived for dielectric loaded ring-plane slow-...
A new method to calculate the equivalent relative dielectric constant of the dielectric loaded ring-plane slow-wave structure is proposed. Expressions of dispersion equation and interaction impedance are derived for dielectric loaded ring-plane slow-...
2006,
18.
Abstract:
The relativistic backward-wave oscillator (RBWO) with inner coaxial disk-loaded slow-wave structure (SWS) is studied. The dispersion relation of the SWS is deduced by using the Borgnis’s potential function method according to Maxwell’s equation and F...
The relativistic backward-wave oscillator (RBWO) with inner coaxial disk-loaded slow-wave structure (SWS) is studied. The dispersion relation of the SWS is deduced by using the Borgnis’s potential function method according to Maxwell’s equation and F...
2006,
18.
Abstract:
A cavity beam position monitor (BPM) is designed for the injector of PKU-FEL Facility. The designed frequency of the dipole mode TM110 is 1.3 GHz, which is equal to the frequency of the main accelerator in PKU-FEL Facility. The cross-talk problem is ...
A cavity beam position monitor (BPM) is designed for the injector of PKU-FEL Facility. The designed frequency of the dipole mode TM110 is 1.3 GHz, which is equal to the frequency of the main accelerator in PKU-FEL Facility. The cross-talk problem is ...
2006,
18.
Abstract:
The design of the trigger based on complex programmable logic device(CPLD), the driver circuit and the residual current device(RCD) circuit of MOSFET pulse modulator were introduced, and the parallel-switch and inductive-adder MOSFET modulators were ...
The design of the trigger based on complex programmable logic device(CPLD), the driver circuit and the residual current device(RCD) circuit of MOSFET pulse modulator were introduced, and the parallel-switch and inductive-adder MOSFET modulators were ...
2006,
18.
Abstract:
The effects due to the stray field from Lambertson septum magnet are important, including beam high order resonance and unstable effect, etc, The 3D numerical simulations with OPERA3D/TOSCA code and the optimizing processes of design of Lambertson se...
The effects due to the stray field from Lambertson septum magnet are important, including beam high order resonance and unstable effect, etc, The 3D numerical simulations with OPERA3D/TOSCA code and the optimizing processes of design of Lambertson se...
2006,
18.
Abstract:
The distortion of closed orbit usually causes much side effect which is harmful to synchrotron radiation source such as HLS, so it is necessary to correct the distortion of closed orbit. In this paper, the correction principle, development procedure ...
The distortion of closed orbit usually causes much side effect which is harmful to synchrotron radiation source such as HLS, so it is necessary to correct the distortion of closed orbit. In this paper, the correction principle, development procedure ...
2006,
18.
Abstract:
To improve the acceleration properties of the niobium cavities and niobium-sputtered copper cavities, studies are carried out. For niobium-sputtered copper cavities, by adding a layer of NbN between the copper and niobium, the transition temperature ...
To improve the acceleration properties of the niobium cavities and niobium-sputtered copper cavities, studies are carried out. For niobium-sputtered copper cavities, by adding a layer of NbN between the copper and niobium, the transition temperature ...
