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RSS1998 Vol. 10, No. 03
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1998,
10.
Abstract:
As an intense,nonuniform ultrashortlaser pulse sticks the over dense plasma,theelectron mass increases and the electron plasma frequency decreases due to relativistic effect.Laser wave can penetrate the plasma more deeply. When laser beam is nonuniform,a channel forms as a result of strong pond eromotive force which is clearly shown by two dimensional particle simulation.
As an intense,nonuniform ultrashortlaser pulse sticks the over dense plasma,theelectron mass increases and the electron plasma frequency decreases due to relativistic effect.Laser wave can penetrate the plasma more deeply. When laser beam is nonuniform,a channel forms as a result of strong pond eromotive force which is clearly shown by two dimensional particle simulation.
1998,
10.
Abstract:
Two main impurity influx had been measured with Optical Sepectroscope Multichannel Analysis in HT６Ｍ Tokamak. The producing mechanism and recycling ways had been analyzed ．
Two main impurity influx had been measured with Optical Sepectroscope Multichannel Analysis in HT６Ｍ Tokamak. The producing mechanism and recycling ways had been analyzed ．
1998,
10.
Abstract:
Densitymatched microencapsulation technique ｗａs psented in this paper. Concentricity, sphericity of microshells ppared by the technique was typically more than 98%, 99% respectively. Reduction of vacuole in the wall and pparation of large diameter microshells ｗｅｒe also discussed.
Densitymatched microencapsulation technique ｗａs psented in this paper. Concentricity, sphericity of microshells ppared by the technique was typically more than 98%, 99% respectively. Reduction of vacuole in the wall and pparation of large diameter microshells ｗｅｒe also discussed.
1998,
10.
Abstract:
Ｕｎｒｅｓｏｌｖｅｄ ｔｒａｎｓｉｔｉｏｎ ａｒｒａｙ ｍｏｄｅｌ ｗａｓ ａｐｐｌｉｅｄ ｔｏ ｃａｌｃｕｌａｔｅ ｔｈｅ ｃｈａｒａｃｔｅｒｉｓｔｉｃ ｐａｒａｍｅｔｅｒｓ ｏｆ ３５ ｔｒａｎｓｉｔｉｏｎ ａｒｒａｙｓ ｃｏｎｓｉｓｔｅｄｉｎ ｔｈｅ ｓｐｅｃｔｒｕｍ ｏｆ Ｍ ｂａｎｄ ｆｏｒ Ａｕ ｉｎ ｔｈｅ ０．４３～０．６２ｎｍ ｒａｎｇｅ． Ｔｈｏｓｅ ａｒｒａｙｓ ｗｅｒｅ ｓｕｐｅｒｐｏｓｅｄ ａｃｃｏｒｄｉｎｇ ｔｏ ｔｈｅｉｒ ｔｏｔａｌ ｓｔｅｎｇｔｈ ｏｆ ＵＴＡ ｆｏｒ ｅａｃｈ ｉｏｎｉｃ ｓｐｅｃｔｒｕｍ ａｎｄ ｗｅｉｇｈｔ ｏｆ ｉｏｎ ｆｏｒ ｗｈｏｌｅ Ｍ ｂａｎｄ ｗｉｔｈ ａ Ｇａｕｓｓｉａｎ ｃｕｒｖｅ．Ｔｈｅ ａｇｒｅｅｍｅｎｔ ｂｅｔｗｅｅｎ ｔｈｅｏｒｅｔｉｃａｌ ｃａｌｃｕｌａｔｉｏｎ ａｎｄ ｅｘｐｅｒｉｍｅｎｔ ｒｅｓｕｌｔｓ ｗ
Ｕｎｒｅｓｏｌｖｅｄ ｔｒａｎｓｉｔｉｏｎ ａｒｒａｙ ｍｏｄｅｌ ｗａｓ ａｐｐｌｉｅｄ ｔｏ ｃａｌｃｕｌａｔｅ ｔｈｅ ｃｈａｒａｃｔｅｒｉｓｔｉｃ ｐａｒａｍｅｔｅｒｓ ｏｆ ３５ ｔｒａｎｓｉｔｉｏｎ ａｒｒａｙｓ ｃｏｎｓｉｓｔｅｄｉｎ ｔｈｅ ｓｐｅｃｔｒｕｍ ｏｆ Ｍ ｂａｎｄ ｆｏｒ Ａｕ ｉｎ ｔｈｅ ０．４３～０．６２ｎｍ ｒａｎｇｅ． Ｔｈｏｓｅ ａｒｒａｙｓ ｗｅｒｅ ｓｕｐｅｒｐｏｓｅｄ ａｃｃｏｒｄｉｎｇ ｔｏ ｔｈｅｉｒ ｔｏｔａｌ ｓｔｅｎｇｔｈ ｏｆ ＵＴＡ ｆｏｒ ｅａｃｈ ｉｏｎｉｃ ｓｐｅｃｔｒｕｍ ａｎｄ ｗｅｉｇｈｔ ｏｆ ｉｏｎ ｆｏｒ ｗｈｏｌｅ Ｍ ｂａｎｄ ｗｉｔｈ ａ Ｇａｕｓｓｉａｎ ｃｕｒｖｅ．Ｔｈｅ ａｇｒｅｅｍｅｎｔ ｂｅｔｗｅｅｎ ｔｈｅｏｒｅｔｉｃａｌ ｃａｌｃｕｌａｔｉｏｎ ａｎｄ ｅｘｐｅｒｉｍｅｎｔ ｒｅｓｕｌｔｓ ｗ
1998,
10.
Abstract:
Physical equations of laser ablative hydrodynamic instability in the code EUL2D is given. Slide grids and some techniques in the calculation is reported. Simulation results of the EUL2D code are good agreements with those of the Takabe formula, the FAST2D code and the LASNEX code. Our numerical simulation reproduced the experimental result of laser ablative Rayleigh-Taylor instability in Osaka University. It is discovered that lateral ablation of electron conduction plays an important role in nonlinear evolution of the Rayleigh-Taylor instability with a longer wavelength ．
Physical equations of laser ablative hydrodynamic instability in the code EUL2D is given. Slide grids and some techniques in the calculation is reported. Simulation results of the EUL2D code are good agreements with those of the Takabe formula, the FAST2D code and the LASNEX code. Our numerical simulation reproduced the experimental result of laser ablative Rayleigh-Taylor instability in Osaka University. It is discovered that lateral ablation of electron conduction plays an important role in nonlinear evolution of the Rayleigh-Taylor instability with a longer wavelength ．
1998,
10.
Abstract:
Choice criteria on target material for soft Xray projection lithography source were proposed in this paper. Spectral data of Lilike oxygen ion were given based on this criteria. The characteristics of new plasma target were given compared with conventional metal targets ．
Choice criteria on target material for soft Xray projection lithography source were proposed in this paper. Spectral data of Lilike oxygen ion were given based on this criteria. The characteristics of new plasma target were given compared with conventional metal targets ．
1998,
10.
Abstract:
Ｔｏ ｅｘｐｌｏｒｅ ｔｈｅ ｐｒｏｐｅｒｔｉｅｓ ｏｆ ｔｈｅ ｏｐｔｉｃａｌ ｓｙｓｔｅｍ ｉｎ ｗｈｉｃｈ ａ ｒａｎｄｏｍ ｐｈａｓｅ ｐｌａｔｅ ｗａｓ ａｐｐｌｉｅｄ ｔｏ ｕｎｉｆｏｒｍ ｉｌｌｕｍｉｎａｔｉｏｎ ｏｎ ｔｈｅ ｔａｒｇｅｔ ｐｌａｎｅ， ｗｅ ｆｉｒｓｔ ｃａｒｒｉｅｄ ｏｕｔ ｔｈｅ ｅｘｐｅｒｉｍｅｎｔ ｏｎ ｔｈｅ ｉｌｌｕｍｉｎａｔｉｏｎ ｕｎｉｆｏｒｍｉｔｙ ｗｈｅｎ ｔｈｅ ｔａｒｇｅｔ ｐｌａｎｅ ｗａｓ ｄｅｆｏｃｕｓｅｄ． Ｅｘｐｅｒｉｍｅｎｔａｌ ｒｅｓｕｌｔｓ ｓｈｏｗｅｄ ｔｈａｔ ｔｈｅ ｕｎｉｆｏｒｍ ｉｌｌｕｍｉｎａｔｉｏｎ ｏｎ ｔｈｅ ｔａｒｇｅｔ ｐｌａｎｅ ｃａｎ ｂｅ ｏｂｔａｉｎｅｄ ｗｈｅｎ ｉｔ ｒａｎｇｅｄ ｏｖｅｒ ａ ｗｉｄｅ ｉｎｔｅｒｖａｌ ｎｅａｒ ｔｈｅ ｆｏｃａｌ ｐｌａｎｅ， ａｎｄ ｔｈａｔ ｔｈ?
Ｔｏ ｅｘｐｌｏｒｅ ｔｈｅ ｐｒｏｐｅｒｔｉｅｓ ｏｆ ｔｈｅ ｏｐｔｉｃａｌ ｓｙｓｔｅｍ ｉｎ ｗｈｉｃｈ ａ ｒａｎｄｏｍ ｐｈａｓｅ ｐｌａｔｅ ｗａｓ ａｐｐｌｉｅｄ ｔｏ ｕｎｉｆｏｒｍ ｉｌｌｕｍｉｎａｔｉｏｎ ｏｎ ｔｈｅ ｔａｒｇｅｔ ｐｌａｎｅ， ｗｅ ｆｉｒｓｔ ｃａｒｒｉｅｄ ｏｕｔ ｔｈｅ ｅｘｐｅｒｉｍｅｎｔ ｏｎ ｔｈｅ ｉｌｌｕｍｉｎａｔｉｏｎ ｕｎｉｆｏｒｍｉｔｙ ｗｈｅｎ ｔｈｅ ｔａｒｇｅｔ ｐｌａｎｅ ｗａｓ ｄｅｆｏｃｕｓｅｄ． Ｅｘｐｅｒｉｍｅｎｔａｌ ｒｅｓｕｌｔｓ ｓｈｏｗｅｄ ｔｈａｔ ｔｈｅ ｕｎｉｆｏｒｍ ｉｌｌｕｍｉｎａｔｉｏｎ ｏｎ ｔｈｅ ｔａｒｇｅｔ ｐｌａｎｅ ｃａｎ ｂｅ ｏｂｔａｉｎｅｄ ｗｈｅｎ ｉｔ ｒａｎｇｅｄ ｏｖｅｒ ａ ｗｉｄｅ ｉｎｔｅｒｖａｌ ｎｅａｒ ｔｈｅ ｆｏｃａｌ ｐｌａｎｅ， ａｎｄ ｔｈａｔ ｔｈ?
1998,
10.
Abstract:
It is theoretically demonstated that a design of flat-field grazing-incidence spectrograph for soft X-ray is practicable through the numeral calculations of the light path function of the flat-field grating-incidence concave grating. The flexibility of use of the flat-field grating with variable spacing grooves are improved. Furthermore, under the condition of keeping the flat-field focusing, the light flux of the spectrograph can be increased about one order of magnitude by cancelling the entrance slit of the spectrograph ．
It is theoretically demonstated that a design of flat-field grazing-incidence spectrograph for soft X-ray is practicable through the numeral calculations of the light path function of the flat-field grating-incidence concave grating. The flexibility of use of the flat-field grating with variable spacing grooves are improved. Furthermore, under the condition of keeping the flat-field focusing, the light flux of the spectrograph can be increased about one order of magnitude by cancelling the entrance slit of the spectrograph ．
1998,
10.
Abstract:
Ｏｎｅ ｃａｎ ｕｓｕａｌｌｙ ｍｅａｓｕｒｅ ｔｈｅ ｓｃａｔｔｅｒｉｎｇ ｌｉｇｈｔ ｉｎ ｌａｓｅｒ ｐｌａｓｍａ ｉｎｔｅｒａｃｔｉｏｎ ｔｈｒｏｕｇｈ ｔｈｅ ＰＩＮ ｏｒ ｐｙｒｏｅｌｅｃｔｒｉｃ ｄｅｔｅｃｔｏｒ ｗｈｉｃｈ ｉｓ ｄｉｓｃｒｅｔｅｄ ｉｎ ｃｈａｍｂｅｒ ｆｏｒ ｔｈｅ ｍｅａｓｕｒｅ ｏｆ ｌｉｇｈｔ ａｎｇｕｌａｒ ｄｅｐｅｎｄｅｎｃｅ．Ｉｔ ｉｓ ｔｈｅ ｍａｉｎ ｄｉａｇｎｏｓｔｉｃ ｔｏｏｌ ｆｏｒ ｔｈｅ ｓｃａｔｔｅｒｉｎｇ ｌｉｇｈｔ ｂｕｔ ｉｓ ｄｉｆｆｉｃｕｌｔ ｔｏ ｏｂｔａｉｎ ｔｈｅ ａｃｔｕａｌ ａｎｇｕｌａｒ ｄｅｐｅｎｄｅｎｃｅ ｂｅｃａｕｓｅ ｏｆ ｔｈｅ ｆｉｎｉｔｅ ｏｂｓｅｒｖａｔｉｏｎ ｐｏｉｎｔ．Ｔｈｉｓ ｐａｐｅｒ ｒｅｐｏｒｔｓ ａ ｎｅｗ ｗａｙ ｗｈｉｃｈ ｃｏｒｒｅｃｔ ａｌｌ ｏｆ ｔｈｅ ｓｃａｔｔｅｒｉ?
Ｏｎｅ ｃａｎ ｕｓｕａｌｌｙ ｍｅａｓｕｒｅ ｔｈｅ ｓｃａｔｔｅｒｉｎｇ ｌｉｇｈｔ ｉｎ ｌａｓｅｒ ｐｌａｓｍａ ｉｎｔｅｒａｃｔｉｏｎ ｔｈｒｏｕｇｈ ｔｈｅ ＰＩＮ ｏｒ ｐｙｒｏｅｌｅｃｔｒｉｃ ｄｅｔｅｃｔｏｒ ｗｈｉｃｈ ｉｓ ｄｉｓｃｒｅｔｅｄ ｉｎ ｃｈａｍｂｅｒ ｆｏｒ ｔｈｅ ｍｅａｓｕｒｅ ｏｆ ｌｉｇｈｔ ａｎｇｕｌａｒ ｄｅｐｅｎｄｅｎｃｅ．Ｉｔ ｉｓ ｔｈｅ ｍａｉｎ ｄｉａｇｎｏｓｔｉｃ ｔｏｏｌ ｆｏｒ ｔｈｅ ｓｃａｔｔｅｒｉｎｇ ｌｉｇｈｔ ｂｕｔ ｉｓ ｄｉｆｆｉｃｕｌｔ ｔｏ ｏｂｔａｉｎ ｔｈｅ ａｃｔｕａｌ ａｎｇｕｌａｒ ｄｅｐｅｎｄｅｎｃｅ ｂｅｃａｕｓｅ ｏｆ ｔｈｅ ｆｉｎｉｔｅ ｏｂｓｅｒｖａｔｉｏｎ ｐｏｉｎｔ．Ｔｈｉｓ ｐａｐｅｒ ｒｅｐｏｒｔｓ ａ ｎｅｗ ｗａｙ ｗｈｉｃｈ ｃｏｒｒｅｃｔ ａｌｌ ｏｆ ｔｈｅ ｓｃａｔｔｅｒｉ?
1998,
10.
Abstract:
Ｔhe fabricating technology of Ar ion beam etching for largearea microlens array of 128×128 in ZrO2, InP, Si, and SiO2 substrates, was discussed in this paper. The experimental results showed that the experimental conditions of fabricating microlens array with the pdeterminating parameters in the different substrates were different. The experimental relations between the ionbeametching rate and ionbeam energy, and the SEM photograph of Si microlens array, were given.
Ｔhe fabricating technology of Ar ion beam etching for largearea microlens array of 128×128 in ZrO2, InP, Si, and SiO2 substrates, was discussed in this paper. The experimental results showed that the experimental conditions of fabricating microlens array with the pdeterminating parameters in the different substrates were different. The experimental relations between the ionbeametching rate and ionbeam energy, and the SEM photograph of Si microlens array, were given.
1998,
10.
Abstract:
The energy efficiency and radiation non-uniformity of planar radiation field provided by several kinds of hohlraum are calculated. For hohlraum with fixed laser entrance holes and fixed laser beams an adequate ratio of planar target area to hohlraum wall area can satisfy the requirement of both higher energy efficiency and lower radiation non-uniformity of target．
The energy efficiency and radiation non-uniformity of planar radiation field provided by several kinds of hohlraum are calculated. For hohlraum with fixed laser entrance holes and fixed laser beams an adequate ratio of planar target area to hohlraum wall area can satisfy the requirement of both higher energy efficiency and lower radiation non-uniformity of target．
1998,
10.
Abstract:
The size, angle spad and the brightness of the center of the synchrotron radiation light sources are very important to the users. Some properties and the calculation of the size, angle spad and the brightness of the center of the synchrotron light source are discussed in detail. The results of Hefei Synchrotron Light Source are given ．
The size, angle spad and the brightness of the center of the synchrotron radiation light sources are very important to the users. Some properties and the calculation of the size, angle spad and the brightness of the center of the synchrotron light source are discussed in detail. The results of Hefei Synchrotron Light Source are given ．
1998,
10.
Abstract:
The numerical simulation code was provided to calculate the coherentemission by the measured magnetic field values. The spectral width and the coherent enhance <>factor of the 1st, 3rd harmonic were calculated, and the optimization of the external laser power and the Nd were presented
The numerical simulation code was provided to calculate the coherentemission by the measured magnetic field values. The spectral width and the coherent enhance <>factor of the 1st, 3rd harmonic were calculated, and the optimization of the external laser power and the Nd were presented
1998,
10.
Abstract:
A stochastic cooling system was designed in the HIRFLCSR project. Based on FokkerPlanck equation, the cooling time of the longitudinal cooling with a notch filter and transverse cooling was calculated. During the calculation, the optimum gain was obtained and applied.
A stochastic cooling system was designed in the HIRFLCSR project. Based on FokkerPlanck equation, the cooling time of the longitudinal cooling with a notch filter and transverse cooling was calculated. During the calculation, the optimum gain was obtained and applied.
1998,
10.
Abstract:
The approximate analysis of electron motion under inhomogeneous conditionin drifting tube filled with plasma was given in this paper, the beam with strong pulsation under the same condition was also studied， the effects of distribution of beam and plasma to the transmission properties wｅre discussed in details, and somePASOTＲON experiments were interpted．
The approximate analysis of electron motion under inhomogeneous conditionin drifting tube filled with plasma was given in this paper, the beam with strong pulsation under the same condition was also studied， the effects of distribution of beam and plasma to the transmission properties wｅre discussed in details, and somePASOTＲON experiments were interpted．
1998,
10.
Abstract:
The design method of the high voltage and the fast response time pulse transformer used in the condition of low load impedance was introduced. A nominal voltage 600kV pulse transformer used in a modulation type accelerator was designed with this method and the results of the experimental value consistent with the theoretical value are obtained. It showed that the design method is feasible and can be used in the design of higher voltage pulse transformers ．
The design method of the high voltage and the fast response time pulse transformer used in the condition of low load impedance was introduced. A nominal voltage 600kV pulse transformer used in a modulation type accelerator was designed with this method and the results of the experimental value consistent with the theoretical value are obtained. It showed that the design method is feasible and can be used in the design of higher voltage pulse transformers ．
1998,
10.
Abstract:
The performance of Singlet Oxygen Generator(SOG) as energy source of COIL determine the performance of COIL immediately, but the stability of BHP influence the stability of SOG. Ｔhe enviroｎment of BHP pparation and working conditions were discussed. In the last, the related method to pvent BHP from unstable operation was given．
The performance of Singlet Oxygen Generator(SOG) as energy source of COIL determine the performance of COIL immediately, but the stability of BHP influence the stability of SOG. Ｔhe enviroｎment of BHP pparation and working conditions were discussed. In the last, the related method to pvent BHP from unstable operation was given．
1998,
10.
Abstract:
The simulation code for laser beams passing through a multipass amplifer system has been psented, where the gain distribution, gain saturation, gain recovery parameter, absorption loss, Bintegral and optical elements, such as aperture and spatial filter, which influence laser beam propagation and amplification have been all considered. Numerical illustrative examples have been given ．
The simulation code for laser beams passing through a multipass amplifer system has been psented, where the gain distribution, gain saturation, gain recovery parameter, absorption loss, Bintegral and optical elements, such as aperture and spatial filter, which influence laser beam propagation and amplification have been all considered. Numerical illustrative examples have been given ．
1998,
10.
Abstract:
We examined carefully the reliability of C8 code according to 3D Fresnel integral equations． The transmission behavior of the short wavelength laser in virtual confocal cavity with circular mirrors of spherical surfaces were computed and analyzed. Under condition of the same transmission distance, the distribution of farfield intensity changes from the projection of nearfield intensity distribution to the distribution of superGaussian when magnification on m changes from 10 to 1.42．
We examined carefully the reliability of C8 code according to 3D Fresnel integral equations． The transmission behavior of the short wavelength laser in virtual confocal cavity with circular mirrors of spherical surfaces were computed and analyzed. Under condition of the same transmission distance, the distribution of farfield intensity changes from the projection of nearfield intensity distribution to the distribution of superGaussian when magnification on m changes from 10 to 1.42．
1998,
10.
Abstract:
ＵＶ ｌａｓｅｒｉｎｄｕｃｅｄ ｄａｍａｇｅ ｔｈｒｅｓｈｏｌｄ ｉｎ ｆｕｓｅｄ ｓｉｌｉｃａ ｗａｓ ｔｈｅｏｒｅｔｉｃａｌｌｙ ｉｎｖｅｓｔｉｇａｔｅｄ ｂａｓｅｄ ｏｎ ｔｈｅ ｍｏｄｅｌ ｔｈａｔ ｔｈｅ ｃｏｎｄｕｃｔｉｏｎ ｂａｎｄ ｅｌｅｃｔｒｏｎｓ ｗｅｒｅ ｐｒｏｄｕｃｅｄ ｆｒｏｍ ｄｅｆｅｃｔ ｓｔａｔｅｓ ｖｉａ ｌｉｎｅａｒ ａｂｓｏｒｐｔｉｏｎ ａｎｄ ｆｒｏｍ ｖａｌｅｎｃｅ ｂａｎｄ ｖｉａ ｔｗｏｐｈｏｔｏｎ ａｂｓｏｒｐｔｉｏｎ． Ｔｈｅ ａｐｐｌｉｃａｔｉｏｎ ｔｏ ｉｍｐｒｏｖｅ ｔｈｅ ｄａｍａｇｅ ｔｈｒｅｓｈｏｌｄ ｏｆ ｆｕｓｅｄ ｓｉｌｉｃａ ｗａｓ ａｌｓｏ ｄｉｓｃｕｓｓｅｄ．
ＵＶ ｌａｓｅｒｉｎｄｕｃｅｄ ｄａｍａｇｅ ｔｈｒｅｓｈｏｌｄ ｉｎ ｆｕｓｅｄ ｓｉｌｉｃａ ｗａｓ ｔｈｅｏｒｅｔｉｃａｌｌｙ ｉｎｖｅｓｔｉｇａｔｅｄ ｂａｓｅｄ ｏｎ ｔｈｅ ｍｏｄｅｌ ｔｈａｔ ｔｈｅ ｃｏｎｄｕｃｔｉｏｎ ｂａｎｄ ｅｌｅｃｔｒｏｎｓ ｗｅｒｅ ｐｒｏｄｕｃｅｄ ｆｒｏｍ ｄｅｆｅｃｔ ｓｔａｔｅｓ ｖｉａ ｌｉｎｅａｒ ａｂｓｏｒｐｔｉｏｎ ａｎｄ ｆｒｏｍ ｖａｌｅｎｃｅ ｂａｎｄ ｖｉａ ｔｗｏｐｈｏｔｏｎ ａｂｓｏｒｐｔｉｏｎ． Ｔｈｅ ａｐｐｌｉｃａｔｉｏｎ ｔｏ ｉｍｐｒｏｖｅ ｔｈｅ ｄａｍａｇｅ ｔｈｒｅｓｈｏｌｄ ｏｆ ｆｕｓｅｄ ｓｉｌｉｃａ ｗａｓ ａｌｓｏ ｄｉｓｃｕｓｓｅｄ．
1998,
10.
Abstract:
Multipass pamplification and power amplification experiments are performed with a two-stage Ti∶sapphire multipass configuration. Using a frequency-doubled Nd∶YAG laser as a pumping source, a 1nJ injected seed pulse is amplified to 23mJ with overall gain over 10７．
Multipass pamplification and power amplification experiments are performed with a two-stage Ti∶sapphire multipass configuration. Using a frequency-doubled Nd∶YAG laser as a pumping source, a 1nJ injected seed pulse is amplified to 23mJ with overall gain over 10７．
1998,
10.
Abstract:
Ni-like Sm X-ray laser pumped by double short duration pulse was simulated with series code. Simulation results were compared with experiments done by RAL in UK.The curved target and the ununiformity on line focus were also researched. The Optimization in duration, intensity and delay time were done. Using curved target with radius of 200cm and with 85ps duration, 3.4ns delay time, 9% ppulse and 5.82×１０１３Ｗ/c m ２ main pulse intensity, the output X-ray laser energy was also increasing to 10 times in 18mm length single target.
Ni-like Sm X-ray laser pumped by double short duration pulse was simulated with series code. Simulation results were compared with experiments done by RAL in UK.The curved target and the ununiformity on line focus were also researched. The Optimization in duration, intensity and delay time were done. Using curved target with radius of 200cm and with 85ps duration, 3.4ns delay time, 9% ppulse and 5.82×１０１３Ｗ/c m ２ main pulse intensity, the output X-ray laser energy was also increasing to 10 times in 18mm length single target.
1998,
10.
Abstract:
Ｉｎ ｔｈｉｓ ｐａｐｅｒ， ａ ｐｒｏｇｒａｍ ｏｎ Ｘｒａｙ ｌａｓｅｒ’ｓ ｔｈｒｅｅｄｉｍｅｎｓｉｏｎａｌ ｐｒｏｐａｇａｔｉｏｎ ａｎｄ ａｍｐｌｉｆｉｃａｔｉｏｎ ｆｏｒ ｓｉｎｇｌｅ ｔａｒｇｅｔ ｉｓ ｐｒｅｓｅｎｔｅｄ． ＡＳＥ ｍｏｄｅｌ ａｎｄ ｇｅｏｍｅｔｒｉｃａｌ ｏｐｔｉｃｓ ａｐｐｒｏｘｉｍａｔｉｏｎ ａｒｅ ａｄｏｐｔｅｄ． Ｗｉｔｈｏｕｔ ｃｏｎｓｉｄｅｒｉｎｇ ｓａｔｕｒａｔｉｏｎ ａｎｄｐｌａｓｍａ ａｇｅｉｎｇ ａｎｄ ｗｉｔｈ ｒｅｆｒａｃｔｉｏｎ ｅｆｆｅｃｔｓ ｔａｋｅｎ ｉｎｔｏ ａｃｃｏｕｎｔ， ａｎｇｌｅ ｄｉｓｔｒｉｂｕｔ ｉｏｎ ａｎｄ ｓｐａｔｉａｌ ｄｉｓｔｒｉｂｕｔｉｏｎ ｏｆ Ｘｒａｙ ｌａｓｅｒ ｉｎｔｅｎｓｉｔｙ ｗｉｔｈ ｉｍｐｏｒｔａｎｔ ｄａｔａ ｆｏｒ ｓａｔｕｒａｔｉｏｎ ｒｅｓｅａｒｃｈ ａｎｄ ｅｓｔｉ?
Ｉｎ ｔｈｉｓ ｐａｐｅｒ， ａ ｐｒｏｇｒａｍ ｏｎ Ｘｒａｙ ｌａｓｅｒ’ｓ ｔｈｒｅｅｄｉｍｅｎｓｉｏｎａｌ ｐｒｏｐａｇａｔｉｏｎ ａｎｄ ａｍｐｌｉｆｉｃａｔｉｏｎ ｆｏｒ ｓｉｎｇｌｅ ｔａｒｇｅｔ ｉｓ ｐｒｅｓｅｎｔｅｄ． ＡＳＥ ｍｏｄｅｌ ａｎｄ ｇｅｏｍｅｔｒｉｃａｌ ｏｐｔｉｃｓ ａｐｐｒｏｘｉｍａｔｉｏｎ ａｒｅ ａｄｏｐｔｅｄ． Ｗｉｔｈｏｕｔ ｃｏｎｓｉｄｅｒｉｎｇ ｓａｔｕｒａｔｉｏｎ ａｎｄｐｌａｓｍａ ａｇｅｉｎｇ ａｎｄ ｗｉｔｈ ｒｅｆｒａｃｔｉｏｎ ｅｆｆｅｃｔｓ ｔａｋｅｎ ｉｎｔｏ ａｃｃｏｕｎｔ， ａｎｇｌｅ ｄｉｓｔｒｉｂｕｔ ｉｏｎ ａｎｄ ｓｐａｔｉａｌ ｄｉｓｔｒｉｂｕｔｉｏｎ ｏｆ Ｘｒａｙ ｌａｓｅｒ ｉｎｔｅｎｓｉｔｙ ｗｉｔｈ ｉｍｐｏｒｔａｎｔ ｄａｔａ ｆｏｒ ｓａｔｕｒａｔｉｏｎ ｒｅｓｅａｒｃｈ ａｎｄ ｅｓｔｉ?
1998,
10.
Abstract:
Ｔｈｅ ｓｔｕｄｉｅｓ ｏｆ ｔｈｅ ｂｌｏｗｏｆｆ ｉｍｐｕｌｓｅｓ ｐｒｏｄｕｃｅｄ ｉｎ ｔｈｅ ａｌｕｍｉｎｕｍ ａｌｌｏｙ ｔａｒｇｅｔｓ ｉｒｒａｄｉａｔｅｄ ｂｙ ｉｎｔｅｎｓｅ ｐｕｌｓｅｄ Ｘｒａｙ ａｒｅ ｄｉｓｃｕｓｓｅｄ ｉｎ ｔｈｉｓ ｐａｐｅｒ． Ｉｎ ｅｘｐｅｒｉｍｅｎｔｓ， ｔｈｅ ｐｒｏｂｅ ｐｒｉｎｃｉｐｌｅ ｏｆ ｄｉｒｅｃｔｌｙ ｍｅａｓｕｒｉｎｇ ｔｈｅ ｓｐｅｃｉｆｉｃ ｓｅｒｉｅｓ ｏｆ ｔｉｍｅ ｉｎｔｅｒｖａｌｓ ａｎｄ ｖａｒｉａｂｌｅ ｒｅｌｕｃｔａｎｃｅ ｔｒａｎｓｄｕｃｉｎｇ ｔｅｃｈｎｉｑｕｅ ｗａｓ ｕｓｅｄ． Ｉｎ ｃｏｍｐｕｔａｔｉｏｎ，ａｎ ａｎａｌｙｔｉｃ ｃｏｍｐｕｔｉｎｇ ｍｅｔｈｏｄ ｗａｓ ｕｓｅｄ． Ｔｈｅ ｒｅｓｕｌｔｓ ｓｈｏｗ ｔｈａｔ ｔｈｅ ｃｏｍｐｕｔｅｄ ｖａｌｕｅｓ ａｒｅ ｉｎ ｂａｓｉｃａｌ
Ｔｈｅ ｓｔｕｄｉｅｓ ｏｆ ｔｈｅ ｂｌｏｗｏｆｆ ｉｍｐｕｌｓｅｓ ｐｒｏｄｕｃｅｄ ｉｎ ｔｈｅ ａｌｕｍｉｎｕｍ ａｌｌｏｙ ｔａｒｇｅｔｓ ｉｒｒａｄｉａｔｅｄ ｂｙ ｉｎｔｅｎｓｅ ｐｕｌｓｅｄ Ｘｒａｙ ａｒｅ ｄｉｓｃｕｓｓｅｄ ｉｎ ｔｈｉｓ ｐａｐｅｒ． Ｉｎ ｅｘｐｅｒｉｍｅｎｔｓ， ｔｈｅ ｐｒｏｂｅ ｐｒｉｎｃｉｐｌｅ ｏｆ ｄｉｒｅｃｔｌｙ ｍｅａｓｕｒｉｎｇ ｔｈｅ ｓｐｅｃｉｆｉｃ ｓｅｒｉｅｓ ｏｆ ｔｉｍｅ ｉｎｔｅｒｖａｌｓ ａｎｄ ｖａｒｉａｂｌｅ ｒｅｌｕｃｔａｎｃｅ ｔｒａｎｓｄｕｃｉｎｇ ｔｅｃｈｎｉｑｕｅ ｗａｓ ｕｓｅｄ． Ｉｎ ｃｏｍｐｕｔａｔｉｏｎ，ａｎ ａｎａｌｙｔｉｃ ｃｏｍｐｕｔｉｎｇ ｍｅｔｈｏｄ ｗａｓ ｕｓｅｄ． Ｔｈｅ ｒｅｓｕｌｔｓ ｓｈｏｗ ｔｈａｔ ｔｈｅ ｃｏｍｐｕｔｅｄ ｖａｌｕｅｓ ａｒｅ ｉｎ ｂａｓｉｃａｌ
1998,
10.
Abstract:
Ｔｈｅ Ｎｉｌｉｋｅ Ｄｙ， Ｅｒ ａｎｄ Ｙｂ Ｘｒａｙ ｌａｓｅｒｓ ｗｅｒｅ ｏｂｓｅｒｖｅｄ ｕｎｄｅｒ ｌｏｗｅｒ ｐｕｍｐｉｎｇ ｌａｓｅｒ ｉｒｒａｄｉａｎｃｅ ｏｆ（５８）×１０１３Ｗ／ｃｍ２ ｕｓｉｎｇ ｔｈｅ ｐｒｅｍａｉｎｐｕｌｓｅ ｌａｓｅｒ ｄｒｉｖｉｎｇ ｓｃｈｅｍｅ． Ｔｈｅ ｎｅｗ ｃｏｎｖｅｘ ｃｙｌｉｎｄｒｉｃａｌ ｌｅｎｓ ａｒｒａｙ ｗａｓ ｄｅｓｉｇｎｅｄ． Ｔｈｅ ｔｅｃｈｎｉｑｕｅｓ ｏｆ ｆｏｃｕｓ ｌｉｎｅ ｏｖｅｒｌａｐｐｉｎｇ ａｎｄ ｄｏｕｂｌｅ ｔａｒｇｅｔ ｃｏｕｐｌｉｎｇ ｗｅｒｅ ｕｓｅｄ． Ｔｈｅ ｇａｉｎ ｃｏｅｆｆｉｃｉｅｎｔ ｏｆ １．６ ａｎｄ １．４ｃｍ－１ｗａｓ ｍｅａｓｓｕｒｅｄ ｆｏｒ Ｎｉｌｉｋｅ Ｙｂ ａｎｄ Ｄｙ ｌａｓｅｒ ｒｅｓｐｅｃｔｉｖｅｌｙ．
Ｔｈｅ Ｎｉｌｉｋｅ Ｄｙ， Ｅｒ ａｎｄ Ｙｂ Ｘｒａｙ ｌａｓｅｒｓ ｗｅｒｅ ｏｂｓｅｒｖｅｄ ｕｎｄｅｒ ｌｏｗｅｒ ｐｕｍｐｉｎｇ ｌａｓｅｒ ｉｒｒａｄｉａｎｃｅ ｏｆ（５８）×１０１３Ｗ／ｃｍ２ ｕｓｉｎｇ ｔｈｅ ｐｒｅｍａｉｎｐｕｌｓｅ ｌａｓｅｒ ｄｒｉｖｉｎｇ ｓｃｈｅｍｅ． Ｔｈｅ ｎｅｗ ｃｏｎｖｅｘ ｃｙｌｉｎｄｒｉｃａｌ ｌｅｎｓ ａｒｒａｙ ｗａｓ ｄｅｓｉｇｎｅｄ． Ｔｈｅ ｔｅｃｈｎｉｑｕｅｓ ｏｆ ｆｏｃｕｓ ｌｉｎｅ ｏｖｅｒｌａｐｐｉｎｇ ａｎｄ ｄｏｕｂｌｅ ｔａｒｇｅｔ ｃｏｕｐｌｉｎｇ ｗｅｒｅ ｕｓｅｄ． Ｔｈｅ ｇａｉｎ ｃｏｅｆｆｉｃｉｅｎｔ ｏｆ １．６ ａｎｄ １．４ｃｍ－１ｗａｓ ｍｅａｓｓｕｒｅｄ ｆｏｒ Ｎｉｌｉｋｅ Ｙｂ ａｎｄ Ｄｙ ｌａｓｅｒ ｒｅｓｐｅｃｔｉｖｅｌｙ．
1998,
10.
Abstract:
A ｓｉｎｇｌｅｍｏｄｅ ｏｐｅｒａｔｉｏｎ ｏｆ ４０Ｈｚ Ｎｄ：ＹＡＧ ｌａｓｅｒ ｆｏｒ ａｐｐｌｉｃａｔｉｏｎ ｉｎ ｈｉｇｈ ｐｏｗｅｒ ｌａｓｅｒ ｓｙｓｔｅｍ ｗａｓ ｄｅｓｉｇｎｅｄ ａｎｄ ｍａｎｕｆａｃｔｕｒｅd ｕｓｉｎｇ ａ ｒｉｎｇ ｃａｖｉｔｙ ｃｏｎｆｉｇｕｒａｔｉｏｎ， ｃｏｎｔａｉｎｉｎｇ ｅｔaｌｏｎ ａｎｄ ｔｕｎｉｎｇ ｌｏｓｓ ｃｏｎｖｅｎｉｅｎｔｌｙ ｔｅｃｈｎｏｌｏｇｙ． Ｔｈｅ ｌａｓｅｒ ｃａｎ ｂｅ ｏｐｅｒａｔｅｄ ａｔ ５ｍＪ ｐｅｒ ｐｕｌｓｅ ｗｉｔｈ ａ ｐｕｌｓｅ ｗｉｄｔｈ ｏｆ １５～４０ｎｓ ｗｉｔｈｏｕｔ ｍｏｄｕｌａｔｉｏｎ， ｔｈｅ ｏｕｔｐｕｔ ｅｎｅｒｇｙ ｆｌｕｃｔｕａｔｉｏｎ ｌｅｓｓ ｔｈａｎ ８％ ａｎｄ ｐｕｌｓｅ ｒｅｐｅｔｉｔｉｏｎ ｆｒｅｑｕｅｎｃｙ（ＰＲＦ） ｃａｎ ｂｅ ｕｓｅｄ ａｔ ４０Ｈｚ．
A ｓｉｎｇｌｅｍｏｄｅ ｏｐｅｒａｔｉｏｎ ｏｆ ４０Ｈｚ Ｎｄ：ＹＡＧ ｌａｓｅｒ ｆｏｒ ａｐｐｌｉｃａｔｉｏｎ ｉｎ ｈｉｇｈ ｐｏｗｅｒ ｌａｓｅｒ ｓｙｓｔｅｍ ｗａｓ ｄｅｓｉｇｎｅｄ ａｎｄ ｍａｎｕｆａｃｔｕｒｅd ｕｓｉｎｇ ａ ｒｉｎｇ ｃａｖｉｔｙ ｃｏｎｆｉｇｕｒａｔｉｏｎ， ｃｏｎｔａｉｎｉｎｇ ｅｔaｌｏｎ ａｎｄ ｔｕｎｉｎｇ ｌｏｓｓ ｃｏｎｖｅｎｉｅｎｔｌｙ ｔｅｃｈｎｏｌｏｇｙ． Ｔｈｅ ｌａｓｅｒ ｃａｎ ｂｅ ｏｐｅｒａｔｅｄ ａｔ ５ｍＪ ｐｅｒ ｐｕｌｓｅ ｗｉｔｈ ａ ｐｕｌｓｅ ｗｉｄｔｈ ｏｆ １５～４０ｎｓ ｗｉｔｈｏｕｔ ｍｏｄｕｌａｔｉｏｎ， ｔｈｅ ｏｕｔｐｕｔ ｅｎｅｒｇｙ ｆｌｕｃｔｕａｔｉｏｎ ｌｅｓｓ ｔｈａｎ ８％ ａｎｄ ｐｕｌｓｅ ｒｅｐｅｔｉｔｉｏｎ ｆｒｅｑｕｅｎｃｙ（ＰＲＦ） ｃａｎ ｂｅ ｕｓｅｄ ａｔ ４０Ｈｚ．
1998,
10.
Abstract:
Ｄｅｔａｉｌｅｄ ｎｕｍｅｒｉｃａｌ ａｎｄ ｅｘｐｅｒｉｍｅｎｔａｌ ｓｔｕｄｙ ｏｎ ｚｉｇｚａｇ ａｎｄ ｓｔｒａｉｇｈｔ ｏｐｔｉｃａｌ ｐａｔｈ Ｎｄ：ｐｈｏｓｐｈａｔｅ ｇｌａｓｓ ｓｌａｂ ａｍｐｌｉｆｉｅｒ ｓｙｓｔｅｍｓ ｈａｓ ｂｅｅｎ ｍａｄｅ ｔｏ ｃｏｍｐａｒｅ ｔｈｅｉｒ ｓｔｏｒａｇｅ ｅｆｆｉｃｉｅｎｃｙ， ｇａｉｎ ａｎｄ ｆｌｕｏｒｅｓｃｅｎｔ ｄｉｓｔｒｉｂｕｔｉｏｎ， ｅｎｅｒｇｙ ｍａｇｎｉｆｉｃａｔｉｏｎ ａｎｄ ｏｕｔｐｕｔ ｂｅａｍ ｑｕａｌｉｔｙ．Ｔｈｅ ｒｅｓｕｌｔｓ ｈａｖｅ ｓｈｏｗｎ ａｄｖａｎｔａｇｅｓ ｏｆ ｔｈｅ ｚｉｇｚａｇ ｓｌａｂ ａｍｐｌｉｆｉｅｒ ｓｙｓｔｅｍ．
Ｄｅｔａｉｌｅｄ ｎｕｍｅｒｉｃａｌ ａｎｄ ｅｘｐｅｒｉｍｅｎｔａｌ ｓｔｕｄｙ ｏｎ ｚｉｇｚａｇ ａｎｄ ｓｔｒａｉｇｈｔ ｏｐｔｉｃａｌ ｐａｔｈ Ｎｄ：ｐｈｏｓｐｈａｔｅ ｇｌａｓｓ ｓｌａｂ ａｍｐｌｉｆｉｅｒ ｓｙｓｔｅｍｓ ｈａｓ ｂｅｅｎ ｍａｄｅ ｔｏ ｃｏｍｐａｒｅ ｔｈｅｉｒ ｓｔｏｒａｇｅ ｅｆｆｉｃｉｅｎｃｙ， ｇａｉｎ ａｎｄ ｆｌｕｏｒｅｓｃｅｎｔ ｄｉｓｔｒｉｂｕｔｉｏｎ， ｅｎｅｒｇｙ ｍａｇｎｉｆｉｃａｔｉｏｎ ａｎｄ ｏｕｔｐｕｔ ｂｅａｍ ｑｕａｌｉｔｙ．Ｔｈｅ ｒｅｓｕｌｔｓ ｈａｖｅ ｓｈｏｗｎ ａｄｖａｎｔａｇｅｓ ｏｆ ｔｈｅ ｚｉｇｚａｇ ｓｌａｂ ａｍｐｌｉｆｉｅｒ ｓｙｓｔｅｍ．
1998,
10.
Abstract:
I2 fluorescence spectra were measured by OMA4 in the cavity of a continuous wave (CW) Chemical OxygenIodine Laser (COIL). The transition from I2（Ｂ，ν→ Ｘ，ν＂） ｗａs observed and labeled.
I2 fluorescence spectra were measured by OMA4 in the cavity of a continuous wave (CW) Chemical OxygenIodine Laser (COIL). The transition from I2（Ｂ，ν→ Ｘ，ν＂） ｗａs observed and labeled.
1998,
10.
Abstract:
Iｎ ｔｈｉｓ ｐａｐｅｒ ， ｗｅ ｈａｖｅ ｂｅｅｎ ｓｏｌｖｅｄ Ｆｒｅｓｎｅｌ ｉｎｔｅｇｒａｌ ｅｑｕａｔｉｏｎｓ ｂｙ ｔｈｅ ｎｕｍｅｒｉｃａｌ ｉｔｅｒａｔｉｖｅ ｍｅｔｈｏｄ ｉｎ ｖｉｒｔｕａｌ ｃｏｎｆｏｃａｌ ｕｎｓｔａｂｌｅ ｃａｖｉｔｙ ｗｉｔｈ ｔｈｅ ｓｔｒｉｐ ｍｉｒｒｏｒｓ ｏｆ ｃｙｌｉｎｄｒｉｃａｌ ｓｕｒｆａｃｅｓ． Ｃｏｍｐｕｔａｔｉｏｎａｌ ｒｅｓｕｌｔｓ ｉｎｄｉｃａｔｅ ｔｈａｔ ｔｈｅ ｄｉｓｔｒｉｂｕｔｉｏｎ ｏｆ ｎｅａｒｆｉｅｌｄ ｉｎｔｅｎｓｉｔｙ ｄｅｖｉａｔｅｄ ｆｒｏｍ ｔｈｅ ｕｎｉｆｏｒｍ ｄｉｓｔｒｉｂｕｔｉｏｎ ａｎｄ ｎｅａｒｆｉｅｌｄ ｐｈａｓｅ ａｐｐｒｏｘｉｍａｔｅｄ ｔｈｅ ｕｎｉｐｈａｓｅ ｄｉｓｔｒｉｂｕｔｉｏｎ ｉｎ ｔｈｅ ＮＦ ａｎｄ ｍ ｒａｎｇｅ ｓｔｕｄｉｅｄ．Ｗｈｅｎ ＮＦ＝５ ａｎｄ
Iｎ ｔｈｉｓ ｐａｐｅｒ ， ｗｅ ｈａｖｅ ｂｅｅｎ ｓｏｌｖｅｄ Ｆｒｅｓｎｅｌ ｉｎｔｅｇｒａｌ ｅｑｕａｔｉｏｎｓ ｂｙ ｔｈｅ ｎｕｍｅｒｉｃａｌ ｉｔｅｒａｔｉｖｅ ｍｅｔｈｏｄ ｉｎ ｖｉｒｔｕａｌ ｃｏｎｆｏｃａｌ ｕｎｓｔａｂｌｅ ｃａｖｉｔｙ ｗｉｔｈ ｔｈｅ ｓｔｒｉｐ ｍｉｒｒｏｒｓ ｏｆ ｃｙｌｉｎｄｒｉｃａｌ ｓｕｒｆａｃｅｓ． Ｃｏｍｐｕｔａｔｉｏｎａｌ ｒｅｓｕｌｔｓ ｉｎｄｉｃａｔｅ ｔｈａｔ ｔｈｅ ｄｉｓｔｒｉｂｕｔｉｏｎ ｏｆ ｎｅａｒｆｉｅｌｄ ｉｎｔｅｎｓｉｔｙ ｄｅｖｉａｔｅｄ ｆｒｏｍ ｔｈｅ ｕｎｉｆｏｒｍ ｄｉｓｔｒｉｂｕｔｉｏｎ ａｎｄ ｎｅａｒｆｉｅｌｄ ｐｈａｓｅ ａｐｐｒｏｘｉｍａｔｅｄ ｔｈｅ ｕｎｉｐｈａｓｅ ｄｉｓｔｒｉｂｕｔｉｏｎ ｉｎ ｔｈｅ ＮＦ ａｎｄ ｍ ｒａｎｇｅ ｓｔｕｄｉｅｄ．Ｗｈｅｎ ＮＦ＝５ ａｎｄ
1998,
10.
Abstract:
A lot of physical processes, after the electron beam was injected into the plasma edge, are analyzed in details. In particular, we analyzed the formations of the parallel current layer and the radial negative electrical field which makes the plasma confinement transition from the low mode to the high mode,i.e,LH thransition.It was confirmed that the density of the injected electron beam exceed the fixed value, the threshold value for LH thransition,the LH transition was triggered.
A lot of physical processes, after the electron beam was injected into the plasma edge, are analyzed in details. In particular, we analyzed the formations of the parallel current layer and the radial negative electrical field which makes the plasma confinement transition from the low mode to the high mode,i.e,LH thransition.It was confirmed that the density of the injected electron beam exceed the fixed value, the threshold value for LH thransition,the LH transition was triggered.
1998,
10.
Abstract:
The temperature rise and its rate of coated 45 # steel were calculated. The temperature varing with target thickness and laser intensity was analyzed. The influence of surface condition on temperature was also studied. Laser spot influence on temperature rise was given under the same laser power and target thickness. The temperature rise rate varing with irradiation time and target thickness was analyzed according to temperature rise.
The temperature rise and its rate of coated 45 # steel were calculated. The temperature varing with target thickness and laser intensity was analyzed. The influence of surface condition on temperature was also studied. Laser spot influence on temperature rise was given under the same laser power and target thickness. The temperature rise rate varing with irradiation time and target thickness was analyzed according to temperature rise.
1998,
10.
Abstract:
The purpose of this paper is to determine numerically the transient spatial distribution of electric field in an electromagnetic pulse simulator excited by a time varying high power pulse source using an integral equation of the time domain. Some conclusions are drown from the data that a period of time are required for the electromagnetic pulse field to be established in the electromagnetic pulse.
The purpose of this paper is to determine numerically the transient spatial distribution of electric field in an electromagnetic pulse simulator excited by a time varying high power pulse source using an integral equation of the time domain. Some conclusions are drown from the data that a period of time are required for the electromagnetic pulse field to be established in the electromagnetic pulse.
1998,
10.
Abstract:
A new coaxialstructure SuperReltron was explored to develop a low impedance high power microwave tube. This source will have a power output of about 2.5GW with 25% efficiency at 52GHz, input modulate voltage is 125kV and post accelerating voltage is 600kV.Numerical simulations show that the frequency is approximately inversely proportional to the length of screen, and the scaling of output power is proportional to I2 ， when the current is less than the space charge-limit ．
A new coaxialstructure SuperReltron was explored to develop a low impedance high power microwave tube. This source will have a power output of about 2.5GW with 25% efficiency at 52GHz, input modulate voltage is 125kV and post accelerating voltage is 600kV.Numerical simulations show that the frequency is approximately inversely proportional to the length of screen, and the scaling of output power is proportional to I2 ， when the current is less than the space charge-limit ．
1998,
10.
Abstract:
The Vircator generates microwaves at 5.17GHz with several hundred MW and at 774GHz with several MW in our experiments.According to the single charge sheet model of the Virtual Cathode Oscillator, the microwave at 5.17GHz is produced by the oscillation of the virtual cathode itself;the microwave at 7.74GHz is produced by the interaction of the oscillation of the virtual cathode and the modulated eleｃtron beam by the oscillation of the virtual cathode or the reflected eleｃtron beam.
The Vircator generates microwaves at 5.17GHz with several hundred MW and at 774GHz with several MW in our experiments.According to the single charge sheet model of the Virtual Cathode Oscillator, the microwave at 5.17GHz is produced by the oscillation of the virtual cathode itself;the microwave at 7.74GHz is produced by the interaction of the oscillation of the virtual cathode and the modulated eleｃtron beam by the oscillation of the virtual cathode or the reflected eleｃtron beam.
