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RSS2000 Vol. 12, No. 02
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2000,
12.
Abstract:
The wavefront reconstructing is bound to be influenced by the subaperture partition manner based on certain deformable mirror in adaptive optics. This paper takes account of this issue. Zonal wavefront reconstructing model is adopted, the least-squares solution is applied, and the condition number of wavefront-reconstruction-matrix is used to estimate how its morbidity is. The computer simulation results indicate that the morbidity is mainly influenced by the number of subapertures; appropriate manner of subaperture partition may greatly decrease the degree of the morbidity.
The wavefront reconstructing is bound to be influenced by the subaperture partition manner based on certain deformable mirror in adaptive optics. This paper takes account of this issue. Zonal wavefront reconstructing model is adopted, the least-squares solution is applied, and the condition number of wavefront-reconstruction-matrix is used to estimate how its morbidity is. The computer simulation results indicate that the morbidity is mainly influenced by the number of subapertures; appropriate manner of subaperture partition may greatly decrease the degree of the morbidity.
2000,
12.
Abstract:
A pseudo-discrete state approximation is developed. The multi-photon ionization rates of hydrogen in the laser fields are computed by using the pseudo-discrete state approach. The results are in agreement with those of other calculations for the laser with smaller photon energy.
A pseudo-discrete state approximation is developed. The multi-photon ionization rates of hydrogen in the laser fields are computed by using the pseudo-discrete state approach. The results are in agreement with those of other calculations for the laser with smaller photon energy.
2000,
12.
Abstract:
The light intensity of the first-to thrid-order Stokes Raman spectra Raman spectra lines of Carbon disulfide is altered by using fluorescence of dye Rhodamine B in ethanol. The third-order Stokes Raman spectrum line is selectively enhanced. When the pumping power density is ~560MW× cm- 2, phenomena of resonance between the third-order Stokes Raman spectrum line and the dye laser, and of the part or complete depletion of the first and the second-order Stodes Raman spectra line are observed. The concentration of dye Rhodamine B is ~10- 5M and ~10- 4M, and the cell length is 5cm or 1cm. The physical mechanism of the phenomena is discussed.
The light intensity of the first-to thrid-order Stokes Raman spectra Raman spectra lines of Carbon disulfide is altered by using fluorescence of dye Rhodamine B in ethanol. The third-order Stokes Raman spectrum line is selectively enhanced. When the pumping power density is ~560MW× cm- 2, phenomena of resonance between the third-order Stokes Raman spectrum line and the dye laser, and of the part or complete depletion of the first and the second-order Stodes Raman spectra line are observed. The concentration of dye Rhodamine B is ~10- 5M and ~10- 4M, and the cell length is 5cm or 1cm. The physical mechanism of the phenomena is discussed.
2000,
12.
Abstract:
A novel high energy laser beam detector for measuring energy distribution was described in this paper. The detector consists of separating board, heat measurer array and heat container, and characterized by its capability of undertaking much energy density, large detecting area and little error of energy measurement. The calibration procedure and some testing results are also included in this paper. The detector provides a new means to measure energy distribution of high energy laser beam.
A novel high energy laser beam detector for measuring energy distribution was described in this paper. The detector consists of separating board, heat measurer array and heat container, and characterized by its capability of undertaking much energy density, large detecting area and little error of energy measurement. The calibration procedure and some testing results are also included in this paper. The detector provides a new means to measure energy distribution of high energy laser beam.
2000,
12.
Abstract:
By using the Zernike and the Karhunen-Loeve wavefront reconstruction algorithm, the wavefront reconstruction error of a Hartmann sensor on measuring the atmosphere disturbed wavefront was analyzed in this paper. In the condition of without measurement noise, there are two kinds of wavefront reconstruction errors: the mode coupling error causing by finite spatial frequency of sub-apertures and the mode cutting error by using finite mode numbers. It is showed that the wavefront reconstruction error will be minimum while optimal mode numbers were using, and the Karhunen-Loeve algorithm is somewhat better than the Zernike algorithm.
By using the Zernike and the Karhunen-Loeve wavefront reconstruction algorithm, the wavefront reconstruction error of a Hartmann sensor on measuring the atmosphere disturbed wavefront was analyzed in this paper. In the condition of without measurement noise, there are two kinds of wavefront reconstruction errors: the mode coupling error causing by finite spatial frequency of sub-apertures and the mode cutting error by using finite mode numbers. It is showed that the wavefront reconstruction error will be minimum while optimal mode numbers were using, and the Karhunen-Loeve algorithm is somewhat better than the Zernike algorithm.
2000,
12.
Abstract:
This paper describes an Nd:glass slab amplifiers with 24cm-square aperture, and tested it at different charge voltage. Under the condition of charge voltage 22kV and pumping energy density of 14.62J/cm3, obtain small signal gain coefficient of 4.9%cm-1and energy storage efficiency of 2.43％.
This paper describes an Nd:glass slab amplifiers with 24cm-square aperture, and tested it at different charge voltage. Under the condition of charge voltage 22kV and pumping energy density of 14.62J/cm3, obtain small signal gain coefficient of 4.9%cm-1and energy storage efficiency of 2.43％.
2000,
12.
Abstract:
Rare-earth Yb film targets were prepared on to glass substrates with electron-beam evaporation, and were exposed to various oxidation atmosphere. The valance, species, morphology and the structure of the oxide layer were studied with X-ray photon electron spectroscopy, Auger electron spectroscopy, and X-ray diffraction. The surface of the films is found to have a layer structure, with the oxide layer covered by a hydroxide layer and adsorbed layer. The hydroxide and oxide layer are amorphous, the water in the oxidation atmosphere is the key factor resulting the increase of the ytterbiun film oxidation rate.
Rare-earth Yb film targets were prepared on to glass substrates with electron-beam evaporation, and were exposed to various oxidation atmosphere. The valance, species, morphology and the structure of the oxide layer were studied with X-ray photon electron spectroscopy, Auger electron spectroscopy, and X-ray diffraction. The surface of the films is found to have a layer structure, with the oxide layer covered by a hydroxide layer and adsorbed layer. The hydroxide and oxide layer are amorphous, the water in the oxidation atmosphere is the key factor resulting the increase of the ytterbiun film oxidation rate.
2000,
12.
Abstract:
The fourth harmonic of the YAG fundamental 1.064m m is used to generate the electronically excited iodine I(52p1/2) through the photolysis of CF3I.The direct detection of the decay of the fluorescence at 1.315 m m has been made to investigate the spontaneous radiation life time of I(52p1/2) and the quenching rate constants of the electronically excited iodine atom by CF3I、O2 and He. The results are: 0.0370.005s，0.605torr-1s-1,2.25torr-1s-1 and 0.22torr-1s-1 respectively。
The fourth harmonic of the YAG fundamental 1.064m m is used to generate the electronically excited iodine I(52p1/2) through the photolysis of CF3I.The direct detection of the decay of the fluorescence at 1.315 m m has been made to investigate the spontaneous radiation life time of I(52p1/2) and the quenching rate constants of the electronically excited iodine atom by CF3I、O2 and He. The results are: 0.0370.005s，0.605torr-1s-1,2.25torr-1s-1 and 0.22torr-1s-1 respectively。
2000,
12.
Abstract:
The method of speckles displacement, a new attempt to test characters of space distribution of intensity of laser Gaussian beam, is presented. The diffraction formula and statistical law of optical fields are used to get the cross-corre-lation function of intensities of laser speckles of the moved diffuse object. The position and size of the waist of the Gaussian beam are get.
The method of speckles displacement, a new attempt to test characters of space distribution of intensity of laser Gaussian beam, is presented. The diffraction formula and statistical law of optical fields are used to get the cross-corre-lation function of intensities of laser speckles of the moved diffuse object. The position and size of the waist of the Gaussian beam are get.
2000,
12.
Abstract:
The focusing locations of stray light are calculated based on the design data of 4-pass cavity, an example from the SG-III prototype module main amplifier. Numerical simulation results by ray tracing method show that more than 900 ghost images (1st to 3rd order) are generated by surface reflection of transport spatial filter lenses, and the peak fluency of some ghosts exceed typical optical damage level on the laser material.
The focusing locations of stray light are calculated based on the design data of 4-pass cavity, an example from the SG-III prototype module main amplifier. Numerical simulation results by ray tracing method show that more than 900 ghost images (1st to 3rd order) are generated by surface reflection of transport spatial filter lenses, and the peak fluency of some ghosts exceed typical optical damage level on the laser material.
2000,
12.
Abstract:
The three-dimensional mode are calculated pattern using the fast Fourier trans-form(FFT) algorithm in confocal unstable resonators, especilly discussed the near-field andfar-field results for large eguivalent fresnel number(Neq>10) and middle magnification(M ≤3.0), taking into accout the mirror tilt and change reflection of output mirrors.
The three-dimensional mode are calculated pattern using the fast Fourier trans-form(FFT) algorithm in confocal unstable resonators, especilly discussed the near-field andfar-field results for large eguivalent fresnel number(Neq>10) and middle magnification(M ≤3.0), taking into accout the mirror tilt and change reflection of output mirrors.
2000,
12.
Abstract:
The planar non-linear instantaneous enthalph equation is used to numerically compute the inside temperature distribution of complex medium meatal/ explosive materials with varied thermophysical properties and contact thermal resistance when the surface irradiated by laser. The comparisons of numerical simulation with the analytical results show they are close on the same conditions.
The planar non-linear instantaneous enthalph equation is used to numerically compute the inside temperature distribution of complex medium meatal/ explosive materials with varied thermophysical properties and contact thermal resistance when the surface irradiated by laser. The comparisons of numerical simulation with the analytical results show they are close on the same conditions.
2000,
12.
Abstract:
In this paper Gabor holography of XUV, and phase retrieval method in eliminating twin-image of Gabor hologram are introduced. A code is completed for simulating the whole processes of construction and reconstruction of hologram, and of phase retrieval. The calculated results and comparison of three models are presented. Additionally, the requirements of plasma and experiment condition of X-ray laser Gabor holography are given out in paper. Phase retrieval method includes only once intensity measurement, through numerical iterations, the image of object is worked out.
In this paper Gabor holography of XUV, and phase retrieval method in eliminating twin-image of Gabor hologram are introduced. A code is completed for simulating the whole processes of construction and reconstruction of hologram, and of phase retrieval. The calculated results and comparison of three models are presented. Additionally, the requirements of plasma and experiment condition of X-ray laser Gabor holography are given out in paper. Phase retrieval method includes only once intensity measurement, through numerical iterations, the image of object is worked out.
2000,
12.
Abstract:
In order to achieve a better understanding of sputtering-deposition process, a hybrid simulation combining Fluid and Monte-Carlo model has been developed. An overview of the model is given and some typical results are presented. These results include: the densities and energy distributions of the plasma species, the contributions of different ionization mechanisms to the ionization of argon and sputtered atoms, the relative contributions of different plasma species to the sputtering process, the density distributions of sputtered atoms, the sputtering field and sputtered atom distributions versus energy and angle of argon ions, and the density profile of the thermalized sputtered atoms.
In order to achieve a better understanding of sputtering-deposition process, a hybrid simulation combining Fluid and Monte-Carlo model has been developed. An overview of the model is given and some typical results are presented. These results include: the densities and energy distributions of the plasma species, the contributions of different ionization mechanisms to the ionization of argon and sputtered atoms, the relative contributions of different plasma species to the sputtering process, the density distributions of sputtered atoms, the sputtering field and sputtered atom distributions versus energy and angle of argon ions, and the density profile of the thermalized sputtered atoms.
2000,
12.
Abstract:
Taking the second harmoic generation of Gaussian beam in a KDP crystal of type I matching for example, the effects of diffraction and walkoff to doubling conversion efficiency have been worked out. The result indicates that the effect of diffraction is very small and can even be neglected. When the input Gaussian beam size is very small, the walkoff is very deleterious to doubling conversion. Along with the enlarging of beam size, the effect of walkoff is much smaller. Finally it can even be neglected.
Taking the second harmoic generation of Gaussian beam in a KDP crystal of type I matching for example, the effects of diffraction and walkoff to doubling conversion efficiency have been worked out. The result indicates that the effect of diffraction is very small and can even be neglected. When the input Gaussian beam size is very small, the walkoff is very deleterious to doubling conversion. Along with the enlarging of beam size, the effect of walkoff is much smaller. Finally it can even be neglected.
2000,
12.
Abstract:
This paper introduced Power Conditioning System preionization circuit experimental research. The preionization circuit oscillates possibly. Increasing main discharge delay or increasing the preionization inductor, the oscillation can be avoided. With preionization the flash-lamp current waveform becomes favorable for improving the amplifier efficiency.
This paper introduced Power Conditioning System preionization circuit experimental research. The preionization circuit oscillates possibly. Increasing main discharge delay or increasing the preionization inductor, the oscillation can be avoided. With preionization the flash-lamp current waveform becomes favorable for improving the amplifier efficiency.
2000,
12.
Abstract:
In the paper charge loss cross sections for muliti-charge carbon ions by collision with neutral hydrogen or helium atoms been investigated. Meanwhile electrical potential functions and electron momentum distributions for multi-charge carbon ions have been calculated as well by using binary encounter and Thomas-Fermi approximations. Charge loss section data for multi-charge carbon ions accord well with those of Shirai’s results. The formulae used here and computetional programme developed can be applied to any multi-charge ions, and there is some universility in them.
In the paper charge loss cross sections for muliti-charge carbon ions by collision with neutral hydrogen or helium atoms been investigated. Meanwhile electrical potential functions and electron momentum distributions for multi-charge carbon ions have been calculated as well by using binary encounter and Thomas-Fermi approximations. Charge loss section data for multi-charge carbon ions accord well with those of Shirai’s results. The formulae used here and computetional programme developed can be applied to any multi-charge ions, and there is some universility in them.
2000,
12.
Abstract:
This paper is to describe the precision delay pulse generator and digital delay pulse generator which will be used in the prototype of laser system. There are four independent delay channels output and a standard timing pulse output from the precision delay pulse generator, the delay resolution is 10ps, delay range is 200ns, the trigger jitter is less than 10ps. There are four independent delay channels output and a standard timing pulse output from the digital delay pulse generator, the delay resolution is 5ps, delay range is 10ms, the trigger jitter is less than 200ps.
This paper is to describe the precision delay pulse generator and digital delay pulse generator which will be used in the prototype of laser system. There are four independent delay channels output and a standard timing pulse output from the precision delay pulse generator, the delay resolution is 10ps, delay range is 200ns, the trigger jitter is less than 10ps. There are four independent delay channels output and a standard timing pulse output from the digital delay pulse generator, the delay resolution is 5ps, delay range is 10ms, the trigger jitter is less than 200ps.
2000,
12.
Abstract:
The preparation process of thin silicon foil used to study the spatial nonuniformity in the laser driven intensity was introduced. Oxidation, diffusion, photoetching process and etching technology were adopted to achieve thin silicon foil with a thickness of 3 to 4 micrometers. The surface roughness was about tens nanometers and the grain size of silicon film was nanometer scale. The preparation parameters were studied to control the roughness of thin silicon foil.
The preparation process of thin silicon foil used to study the spatial nonuniformity in the laser driven intensity was introduced. Oxidation, diffusion, photoetching process and etching technology were adopted to achieve thin silicon foil with a thickness of 3 to 4 micrometers. The surface roughness was about tens nanometers and the grain size of silicon film was nanometer scale. The preparation parameters were studied to control the roughness of thin silicon foil.
2000,
12.
Abstract:
Under local thermodynamic equilibrium conditions(LTE), the Monte-Carlo model is used to calculate the spectra of Y-like and Zr-like Au ions in the plasmas. The main point of Monte Carlo model is simulating lines of unresolved transition arrays by assign a random energy and strength to each line, it is then given an assumed Gaussian shape. And added to a plot of the spectrum.
Under local thermodynamic equilibrium conditions(LTE), the Monte-Carlo model is used to calculate the spectra of Y-like and Zr-like Au ions in the plasmas. The main point of Monte Carlo model is simulating lines of unresolved transition arrays by assign a random energy and strength to each line, it is then given an assumed Gaussian shape. And added to a plot of the spectrum.
2000,
12.
Abstract:
This paper introduces one non-interceptive beam intensity measurement by using a cylindrically capacitive which is originally used for the measurements of beam bunch length and central phase. The induced signal from the probe now is used for measuring simultaneously all the three beam characteristics for around m A heavy ions at HIRFL accelerator complex. The measurement principle for beam intensity and the system structure are presented. Applying the technique of virtual instruments to the system is described briefly. The preliminary experimental results are also given.
This paper introduces one non-interceptive beam intensity measurement by using a cylindrically capacitive which is originally used for the measurements of beam bunch length and central phase. The induced signal from the probe now is used for measuring simultaneously all the three beam characteristics for around m A heavy ions at HIRFL accelerator complex. The measurement principle for beam intensity and the system structure are presented. Applying the technique of virtual instruments to the system is described briefly. The preliminary experimental results are also given.
2000,
12.
Abstract:
This paper introduces an experiment of the 10-gap pseudospark discharges driven by Marx generator directly. The previous pulse line accelerator driven pseudospark discharge chamber consists of a Marx generator and a Blumlein line. Now having removed the Blumlein line and redesigned the Marx generator, an electron beam of a current about 4.3kA is obtained under a discharge voltage of 255kV in experiment.
This paper introduces an experiment of the 10-gap pseudospark discharges driven by Marx generator directly. The previous pulse line accelerator driven pseudospark discharge chamber consists of a Marx generator and a Blumlein line. Now having removed the Blumlein line and redesigned the Marx generator, an electron beam of a current about 4.3kA is obtained under a discharge voltage of 255kV in experiment.
2000,
12.
Abstract:
Transverse impedances can be derived from transmission coefficients measured along one of the coaxial wires driven by a 180° hybrid. Our results show that the newly designed cavities behave better than the old prototype cavity with larger transverse impedance,and among the newly designed cavities,dielectric cavity with a coxial like accelerating gap geometry should be the first choice because the transverse impedance of the worse lower mode is oppressed efficiently.
Transverse impedances can be derived from transmission coefficients measured along one of the coaxial wires driven by a 180° hybrid. Our results show that the newly designed cavities behave better than the old prototype cavity with larger transverse impedance,and among the newly designed cavities,dielectric cavity with a coxial like accelerating gap geometry should be the first choice because the transverse impedance of the worse lower mode is oppressed efficiently.
2000,
12.
Abstract:
This paper introduces one non-interceptive beam intensity measurement by using a cylindrically capacitive which is originally used for the measurements of beam bunch length and central phase. The induced signal from the probe now is used for measuring simultaneously all the three beam characteristics for around m A heavy ions at HIRFL accelerator complex. The measurement principle for beam intensity and the system structure are presented. Applying the technique of virtual instruments to the system is described briefly. The preliminary experimental results are also given.
This paper introduces one non-interceptive beam intensity measurement by using a cylindrically capacitive which is originally used for the measurements of beam bunch length and central phase. The induced signal from the probe now is used for measuring simultaneously all the three beam characteristics for around m A heavy ions at HIRFL accelerator complex. The measurement principle for beam intensity and the system structure are presented. Applying the technique of virtual instruments to the system is described briefly. The preliminary experimental results are also given.
2000,
12.
Abstract:
High efficiency collector is favorable for stable operation of electron cooling device and regulation of high voltage power supply. In this paper，the dependence of collector efficiency on the geometric，electrical and magnetic factors is investigated. The result shows that high efficiency can be obtained under appropriate parameter setup. The loss current with respect to primary beam current is less than，the efficiency is .
High efficiency collector is favorable for stable operation of electron cooling device and regulation of high voltage power supply. In this paper，the dependence of collector efficiency on the geometric，electrical and magnetic factors is investigated. The result shows that high efficiency can be obtained under appropriate parameter setup. The loss current with respect to primary beam current is less than，the efficiency is .
2000,
12.
Abstract:
In this paper, the thermal-mechanical effects generated by the pulse ion beam with different energy are numerically studied using ITSW code. The characteristics of the effects, such as energy deposition, ablation, blowoff impulse and thermal shock wave, are obtained.
In this paper, the thermal-mechanical effects generated by the pulse ion beam with different energy are numerically studied using ITSW code. The characteristics of the effects, such as energy deposition, ablation, blowoff impulse and thermal shock wave, are obtained.
2000,
12.
Abstract:
Boundary element method (BEM) and its application in the sensitivity calculation of beam position monitor (BPM) will be described in this paper. It mainly discussed on using BEM calculating the sensitivity of the BPM of NSRL. The method is expeected to apply for checking the reliability of measuring sensitivity with an antenna calibration. Sensitivity with machining error is calculated and serves as a reference to machining request.
Boundary element method (BEM) and its application in the sensitivity calculation of beam position monitor (BPM) will be described in this paper. It mainly discussed on using BEM calculating the sensitivity of the BPM of NSRL. The method is expeected to apply for checking the reliability of measuring sensitivity with an antenna calibration. Sensitivity with machining error is calculated and serves as a reference to machining request.
2000,
12.
Abstract:
This paper bases the study of the amplitude stabilization system on the classic control theory. It includes the analysing of the controlled devices and extracting the model from the real role with the black box method and experiment. It is especially introduced how to increase the gain of the negative feedback under the condition of keeping the loop stable by designing a PID controller upon its model.
This paper bases the study of the amplitude stabilization system on the classic control theory. It includes the analysing of the controlled devices and extracting the model from the real role with the black box method and experiment. It is especially introduced how to increase the gain of the negative feedback under the condition of keeping the loop stable by designing a PID controller upon its model.
2000,
12.
Abstract:
The beam four-dimensional transverse phase-space density distribution (4D-TPSD) is an important physical quantity in beam dynamic. Except the 2-D emittance (a kind of its reducing form), which is commonly measured in a precision of ten percent, there is no way to measure the 4D-TPSD up to now according to my knowledge. In this paper, a method of measuring 4D-TPSD is proposed. Based on the 4-D Radon transform, a section of linear transporting line with two adjustable independent complete parameters (for example, a set of F,D quadrupoles) can be used as the equipment for measuring 4D-TPSD. Because this method is a kind of digital processing as similar to the CT (Computerized Tomography), the precision of the resulted 4D-TPSD will be satisfied for variety of applications (basic researching or
The beam four-dimensional transverse phase-space density distribution (4D-TPSD) is an important physical quantity in beam dynamic. Except the 2-D emittance (a kind of its reducing form), which is commonly measured in a precision of ten percent, there is no way to measure the 4D-TPSD up to now according to my knowledge. In this paper, a method of measuring 4D-TPSD is proposed. Based on the 4-D Radon transform, a section of linear transporting line with two adjustable independent complete parameters (for example, a set of F,D quadrupoles) can be used as the equipment for measuring 4D-TPSD. Because this method is a kind of digital processing as similar to the CT (Computerized Tomography), the precision of the resulted 4D-TPSD will be satisfied for variety of applications (basic researching or
2000,
12.
Abstract:
The structure characteristics of the electroexplosive fuse opening switch (EFOS) of XH-1 are introduced in this paper. A typical experimental result is presented also. The resistance characteristics of EFOS are analyzed. The physical reason why the fuse resistance changes during electrically exploding is discussed. The fuse resistance via time and the resistance increase depending on specific energy are obtained by processing the experimental data.
The structure characteristics of the electroexplosive fuse opening switch (EFOS) of XH-1 are introduced in this paper. A typical experimental result is presented also. The resistance characteristics of EFOS are analyzed. The physical reason why the fuse resistance changes during electrically exploding is discussed. The fuse resistance via time and the resistance increase depending on specific energy are obtained by processing the experimental data.
2000,
12.
Abstract:
Self-consistent equations for the beam-wave interaction in the electron guiding center coordinate are derived. Two new conclusions are drawn by theoretical analysis: the axial bunching and azimuthal bunching can be reinforced in some cases; the effect of the force bunching may surpass the inertial bunching and generate a small gain dip in the small signal region. Theoretical analysis is verified by numerical simulation.
Self-consistent equations for the beam-wave interaction in the electron guiding center coordinate are derived. Two new conclusions are drawn by theoretical analysis: the axial bunching and azimuthal bunching can be reinforced in some cases; the effect of the force bunching may surpass the inertial bunching and generate a small gain dip in the small signal region. Theoretical analysis is verified by numerical simulation.
2000,
12.
Abstract:
On a certain approximation, the generation and the oscillation of microwave in the cavity based on transit-time effect for one shot microwave source are analyzed. For reasons given, we have made theoretical design and numerical simulation of radial klystron oscillator for GW level output. A peak value (average over a period) of 1.6 2GW ( f = 6.0GHz) is obtained. The width of the microwave putse is 40ns under the condition of the potential pulse width of 116ns. An electron efficiency is about 12.8%.
On a certain approximation, the generation and the oscillation of microwave in the cavity based on transit-time effect for one shot microwave source are analyzed. For reasons given, we have made theoretical design and numerical simulation of radial klystron oscillator for GW level output. A peak value (average over a period) of 1.6 2GW ( f = 6.0GHz) is obtained. The width of the microwave putse is 40ns under the condition of the potential pulse width of 116ns. An electron efficiency is about 12.8%.
2000,
12.
Abstract:
By means of the program mPND1D (one-dimensional modeling for PN junction devices), the diode failure and burnout energy absorbed have been calculated for different EMP pulsed voltage sources, and the results are analyzed preliminarily.
By means of the program mPND1D (one-dimensional modeling for PN junction devices), the diode failure and burnout energy absorbed have been calculated for different EMP pulsed voltage sources, and the results are analyzed preliminarily.
