Email alert
RSS2009 Vol. 21, No. 03
Recommend Articles
Display Method:
2009,
21.
Abstract:
The deflection-scan subsystem of the femtosecond electron diffraction system was theoretically studied and an exact solution of the deflection distance was got. The numerical calculations under relativistic correction and non-relativistic correction ...
The deflection-scan subsystem of the femtosecond electron diffraction system was theoretically studied and an exact solution of the deflection distance was got. The numerical calculations under relativistic correction and non-relativistic correction ...
2009,
21.
Abstract:
The “defects” on optics is the main limiting factor in enhancing the power of a high power solid-state laser system. This paper established a “defects” model about amplitude modulation based on statistics. Aimed at the booster of SG-Ⅲ prototype, the ...
The “defects” on optics is the main limiting factor in enhancing the power of a high power solid-state laser system. This paper established a “defects” model about amplitude modulation based on statistics. Aimed at the booster of SG-Ⅲ prototype, the ...
2009,
21.
Abstract:
To study the effect of diffuser throat length on the starting characteristic of the directly drained CW DF/HF chemical laser(DDCL), a double-nozzle small-scale model of the DDCL gas channel was built up. A series of experiments without a secondary fl...
To study the effect of diffuser throat length on the starting characteristic of the directly drained CW DF/HF chemical laser(DDCL), a double-nozzle small-scale model of the DDCL gas channel was built up. A series of experiments without a secondary fl...
2009,
21.
Abstract:
Considering material dispersion and tunneling ray, the D.Gloge’s theory formula of time response of multimode step-index fiber is modified. The modified formula is used to calculate the function of time response of 50 m long, 0.2 mm core diameter ste...
Considering material dispersion and tunneling ray, the D.Gloge’s theory formula of time response of multimode step-index fiber is modified. The modified formula is used to calculate the function of time response of 50 m long, 0.2 mm core diameter ste...
2009,
21.
Abstract:
For a laser resonator cavitiy using an unstable resonator configuration, experiments have proved that the intracavity perturbation is an important influencing factor for degrading the output energy and the beam quality. The influence on eigenmode pro...
For a laser resonator cavitiy using an unstable resonator configuration, experiments have proved that the intracavity perturbation is an important influencing factor for degrading the output energy and the beam quality. The influence on eigenmode pro...
2009,
21.
Abstract:
An optical device with simple structure and low price is developed, which can adjust the laser beam parallel with the telescope axis conveniently and rapidly. The device is mainly composed of two optical wedge planes. The direction of the outgoing la...
An optical device with simple structure and low price is developed, which can adjust the laser beam parallel with the telescope axis conveniently and rapidly. The device is mainly composed of two optical wedge planes. The direction of the outgoing la...
2009,
21.
Abstract:
α-C∶H thin films were deposited by low-pressure plasma chemical vapor deposition(LPPCVD) with H2 (99.999 9%) and Trans-2-butene as source gases. The chemical bonds and electronic structure are analyzed by using FTIR and XPS. The ratio of sp3/sp2 and...
α-C∶H thin films were deposited by low-pressure plasma chemical vapor deposition(LPPCVD) with H2 (99.999 9%) and Trans-2-butene as source gases. The chemical bonds and electronic structure are analyzed by using FTIR and XPS. The ratio of sp3/sp2 and...
2009,
21.
Abstract:
The effect of the filling gas natural convection in the French Laser Mega Joule(LMJ) hohlraum on the target temperature distribution has been studied with a CFD code (Fluent). In order to reduce the temperature nonuniformity around the target, the di...
The effect of the filling gas natural convection in the French Laser Mega Joule(LMJ) hohlraum on the target temperature distribution has been studied with a CFD code (Fluent). In order to reduce the temperature nonuniformity around the target, the di...
2009,
21.
Abstract:
The measurement of plasma electron temperature and density in the HL-2A Tokamak using a YAG laser multipoint Thomson scattering system is described. In this system, a standard lamp-monochromator combination is utilized for the calibration of spectral...
The measurement of plasma electron temperature and density in the HL-2A Tokamak using a YAG laser multipoint Thomson scattering system is described. In this system, a standard lamp-monochromator combination is utilized for the calibration of spectral...
2009,
21.
Abstract:
The image converter tube is a core component in the streak cameras. Its operation was introduced and the model for its internal electronic optical system was built. Numerical simulations were done by ANSYS based on the finite element method, in which...
The image converter tube is a core component in the streak cameras. Its operation was introduced and the model for its internal electronic optical system was built. Numerical simulations were done by ANSYS based on the finite element method, in which...
2009,
21.
Abstract:
A KBA X-ray microscope is a non-coaxial grazing incident X-ray imaging system, whose solid angle is small and image quality requirement is high. It requires strict installation of four reflective mirrors. The conventional position or angle measuremen...
A KBA X-ray microscope is a non-coaxial grazing incident X-ray imaging system, whose solid angle is small and image quality requirement is high. It requires strict installation of four reflective mirrors. The conventional position or angle measuremen...
2009,
21.
Abstract:
The deposition capability of nickel on the surface of poly-α-methylstyrene microspheres was improved by combined treatment of ozone aeration and UV irradiation in aqueous ammonia. Surface properties of the treated film were investigated by X-ray phot...
The deposition capability of nickel on the surface of poly-α-methylstyrene microspheres was improved by combined treatment of ozone aeration and UV irradiation in aqueous ammonia. Surface properties of the treated film were investigated by X-ray phot...
2009,
21.
Abstract:
Molybdenum thin films were fabricated on Si(100) substrates by pulsed laser deposition technique. The effect of substrate temperature on structure and surface morphology of the molybdenum films was investigated at 10－6 Pa with laser pulses of 2 Hz re...
Molybdenum thin films were fabricated on Si(100) substrates by pulsed laser deposition technique. The effect of substrate temperature on structure and surface morphology of the molybdenum films was investigated at 10－6 Pa with laser pulses of 2 Hz re...
2009,
21.
Abstract:
The Kelvin-Helmholtz instability in the inviscid fluid was simulated by applying high-order weighted essentially non-oscillatory(WENO) scheme to solve the two-dimensional conservative Euler equations. The simulation adopted the periodic boundary cond...
The Kelvin-Helmholtz instability in the inviscid fluid was simulated by applying high-order weighted essentially non-oscillatory(WENO) scheme to solve the two-dimensional conservative Euler equations. The simulation adopted the periodic boundary cond...
2009,
21.
Abstract:
The stabilization effect on Rayleigh-Taylor instability of density gradient was studied, with the variational and finite element approach to solve the Chandrasekhar equation. The growth rates under different density profiles were gained for ideal inc...
The stabilization effect on Rayleigh-Taylor instability of density gradient was studied, with the variational and finite element approach to solve the Chandrasekhar equation. The growth rates under different density profiles were gained for ideal inc...
2009,
21.
Abstract:
According to the requirement of 220 GHz gyrotron designed by University of Science and Technology of China, a pulsed magnet system and electron gun have been designed. The pulsed magnet system is dumbbell-shaped with the advantages of long uniform di...
According to the requirement of 220 GHz gyrotron designed by University of Science and Technology of China, a pulsed magnet system and electron gun have been designed. The pulsed magnet system is dumbbell-shaped with the advantages of long uniform di...
2009,
21.
Abstract:
The nonlinear theory of the Ka-band second harmonic gyrotron traveling wave amplifier with two-stage loss waveguide was studied. The two-stage loss waveguide consisted of a loss waveguide and a copper waveguide. The operating parameters of the 35 GHz...
The nonlinear theory of the Ka-band second harmonic gyrotron traveling wave amplifier with two-stage loss waveguide was studied. The two-stage loss waveguide consisted of a loss waveguide and a copper waveguide. The operating parameters of the 35 GHz...
2009,
21.
Abstract:
The thermal performance of a Ku-band space traveling wave tube collector was simulated using the finite element method, attaining the temperature distribution of the collector. The influences of contact resistance and heat radiation on the thermal pe...
The thermal performance of a Ku-band space traveling wave tube collector was simulated using the finite element method, attaining the temperature distribution of the collector. The influences of contact resistance and heat radiation on the thermal pe...
2009,
21.
Abstract:
The inner electric field of EMP simulator with fast rise-time is studied using FEKO which is based on Method of moments(MOM). The simulation result is analyzed and the distribution law of vertical electric field is deduced. The result shows that: (1)...
The inner electric field of EMP simulator with fast rise-time is studied using FEKO which is based on Method of moments(MOM). The simulation result is analyzed and the distribution law of vertical electric field is deduced. The result shows that: (1)...
2009,
21.
Abstract:
By studying the cavity structure of a second-harmonic complex cavity gyrotron with abrupt transition, the modes competition and the interaction between the electron beam and wave, the characteristics of the RF structure, suppression of parasite oscil...
By studying the cavity structure of a second-harmonic complex cavity gyrotron with abrupt transition, the modes competition and the interaction between the electron beam and wave, the characteristics of the RF structure, suppression of parasite oscil...
2009,
21.
Abstract:
A novel compact circularly-polarized(CP) mode converter that converts a TM01 (or TEM) mode into a CP TE11 mode was developed. It is composed of two turnstile junctions. The first turnstile junction transforms the input TM01 circular waveguide mode in...
A novel compact circularly-polarized(CP) mode converter that converts a TM01 (or TEM) mode into a CP TE11 mode was developed. It is composed of two turnstile junctions. The first turnstile junction transforms the input TM01 circular waveguide mode in...
2009,
21.
Abstract:
A linearly polarized array antenna with radial waveguide for L-band was put forward, which can realize rotundity array antenna based on triangle grid. The multilayer radial waveguide and a horizontal ring antenna was researched, then the L-band linea...
A linearly polarized array antenna with radial waveguide for L-band was put forward, which can realize rotundity array antenna based on triangle grid. The multilayer radial waveguide and a horizontal ring antenna was researched, then the L-band linea...
2009,
21.
Abstract:
A new configuration of an axially-extracted vircator with several resonant cavities was put forward. Electromagnetic feature analysis shows this structure can get higher extraction efficiency. Particle simulation indicates this device can produce of ...
A new configuration of an axially-extracted vircator with several resonant cavities was put forward. Electromagnetic feature analysis shows this structure can get higher extraction efficiency. Particle simulation indicates this device can produce of ...
2009,
21.
Abstract:
The ensemble of the cavity scattering matrix and the corresponding radiation scattering matrix were computed, which were converted into normalized scattering matrix and normalized impedance matrix. Eigenvalues of the normalized scattering matrix were...
The ensemble of the cavity scattering matrix and the corresponding radiation scattering matrix were computed, which were converted into normalized scattering matrix and normalized impedance matrix. Eigenvalues of the normalized scattering matrix were...
2009,
21.
Abstract:
A new idea of azimuthal partition to generate bifrequency high power microwave (HPM) is put forward in this paper. According to the operation mechanism of a conventional magnetically insulated transmission line oscillator (MILO), the interaction betw...
A new idea of azimuthal partition to generate bifrequency high power microwave (HPM) is put forward in this paper. According to the operation mechanism of a conventional magnetically insulated transmission line oscillator (MILO), the interaction betw...
2009,
21.
Abstract:
An exact dispersion has been obtained and components of the electromagnetic fields have been evaluated by expanding the surface currents on a thin tape of a traveling wave tube(TWT) in a series of Chebyshev polynomials. And based on the axial compone...
An exact dispersion has been obtained and components of the electromagnetic fields have been evaluated by expanding the surface currents on a thin tape of a traveling wave tube(TWT) in a series of Chebyshev polynomials. And based on the axial compone...
2009,
21.
Abstract:
The situation of titanium foil of high power electron accelerator (1.2 MW)extraction window was studied, because the operating temperature of titanium foil should be controlled within 150 ℃, forced aircooling is the only way to disperse the heat (un...
The situation of titanium foil of high power electron accelerator (1.2 MW)extraction window was studied, because the operating temperature of titanium foil should be controlled within 150 ℃, forced aircooling is the only way to disperse the heat (un...
2009,
21.
Abstract:
RF system of HIRFL-CSRe(cooling storage experimental ring) was designed by ourselves and manufactured domestically, which operates in the frequency range of 0.5~2.0 MHz at first and second harmonic modes. Based on detailed engineering calculation, th...
RF system of HIRFL-CSRe(cooling storage experimental ring) was designed by ourselves and manufactured domestically, which operates in the frequency range of 0.5~2.0 MHz at first and second harmonic modes. Based on detailed engineering calculation, th...
2009,
21.
Abstract:
In order to eliminate the effect of scattered radiation in image reconstruction with the iterative method, it is necessary to design the layout and configuration of the high-energy flash X-ray radiography system with uniform scattering distribution. ...
In order to eliminate the effect of scattered radiation in image reconstruction with the iterative method, it is necessary to design the layout and configuration of the high-energy flash X-ray radiography system with uniform scattering distribution. ...
2009,
21.
Abstract:
The beam optical transfer is important for neutron generator research, therefore the research of the beam transfer system was conducted and the system optical character and composition were expatiated.As a typical case, the composition and optical ch...
The beam optical transfer is important for neutron generator research, therefore the research of the beam transfer system was conducted and the system optical character and composition were expatiated.As a typical case, the composition and optical ch...
2009,
21.
Abstract:
In order to achieve the best expanding effeciency of the diffuser and to use most protons to radiate the French Test Object, the material is chosed from three aspects. They are MCS (multiple Coulomb scattering) angle, energy loss and penetration rate...
In order to achieve the best expanding effeciency of the diffuser and to use most protons to radiate the French Test Object, the material is chosed from three aspects. They are MCS (multiple Coulomb scattering) angle, energy loss and penetration rate...
2009,
21.
Abstract:
Two D-dot voltage monitors and a B-dot current monitor have been designed for laser-triggered switch of PTS prototype. The D-dot monitor consists of a capacitive divider where the capacitance to ground in the probe is relatively small and does not af...
Two D-dot voltage monitors and a B-dot current monitor have been designed for laser-triggered switch of PTS prototype. The D-dot monitor consists of a capacitive divider where the capacitance to ground in the probe is relatively small and does not af...
2009,
21.
Abstract:
In order to study the physics of fast Z-pinches and the key issues of pulse power technology, a 10 MA/6 MV Z-pinch Primary Test Stand(PTS) composed of 24 modules will be built in Institute of Fluid Physics. The prototype module adopting capacitive st...
In order to study the physics of fast Z-pinches and the key issues of pulse power technology, a 10 MA/6 MV Z-pinch Primary Test Stand(PTS) composed of 24 modules will be built in Institute of Fluid Physics. The prototype module adopting capacitive st...
2009,
21.
Abstract:
Circuit models of transmission line transformers are analyzed. A method to restrain the impact of the secondary line is adopted, which is enhancing the impedance of the secondary line. Two typical topologies of transmission line transformers are anal...
Circuit models of transmission line transformers are analyzed. A method to restrain the impact of the secondary line is adopted, which is enhancing the impedance of the secondary line. Two typical topologies of transmission line transformers are anal...
2009,
21.
Abstract:
Transmission lines are widely used in the fast signal transmission at short distances due to its low cost. But its bandwidth should be compensated for its narrowband. A compensation method based on filter is provided and the compensators of small siz...
Transmission lines are widely used in the fast signal transmission at short distances due to its low cost. But its bandwidth should be compensated for its narrowband. A compensation method based on filter is provided and the compensators of small siz...
2009,
21.
Abstract:
The rising edge of the output voltage generated by a linear transformer driver(LTD) was analyzed, and circuit parameters corresponding to the aberration forms of the output voltages were investigated. An LTD was designed based on these analysis, and ...
The rising edge of the output voltage generated by a linear transformer driver(LTD) was analyzed, and circuit parameters corresponding to the aberration forms of the output voltages were investigated. An LTD was designed based on these analysis, and ...
