期刊文献+
共找到17篇文章
< 1 >
每页显示 20 50 100
Endurance-test and theoretical prediction of a rare earth nanocathode for the applied field magnetoplasmadynamic thruster
1
作者 王戈 李永 +8 位作者 周成 魏延明 孔春才 郑学程 张心霨 杨志懋 郑金星 丛云天 王宝军 《Plasma Science and Technology》 SCIE EI CAS CSCD 2023年第10期49-59,共11页
The erosion loss of cathode is essential for the lifetime of magnetoplasmadynamic thruster(MPDT).In this work,an endurance test system for MPDT cathodes was designed and developed,and the erosion characteristics,erosi... The erosion loss of cathode is essential for the lifetime of magnetoplasmadynamic thruster(MPDT).In this work,an endurance test system for MPDT cathodes was designed and developed,and the erosion characteristics,erosion rate and erosion mechanism of the cathode were studied using the system under vacuum condition.The WCe20 hollow cathode was selected to carry out the long-term erosion of 540 h with the argon propellant supply flow rate of40 ml min^(-1),the input current of 25 A,and the central magnetic field intensity of 96 Gs.In order to predict the theoretical service life of cathode,a steady state erosion numerical model was established.The calculation results show that the total erosion rate of sputtering and evaporation is 11.58 mg h^(-1),which is slightly smaller than the test data of the average cathode corrosion rate of 12.70 mg h^(-1) in the experiment,because the experimental value includes start-up erosion rate. 展开更多
关键词 magnetoplasma dynamic thruster nano-oxide cathode ablation models
下载PDF
On the dielectric response function and dispersion relation in strongly coupled magnetized dusty plasmas 被引量:1
2
作者 M Shahmansouri N Khodabakhshi 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第10期465-470,共6页
Using the generalized viscoelastic fluid model, we derive the dielectric response function in a strongly coupled dusty magnetoplasma which reveals two different dust acoustic(DA) wave modes in the hydrodynamic and k... Using the generalized viscoelastic fluid model, we derive the dielectric response function in a strongly coupled dusty magnetoplasma which reveals two different dust acoustic(DA) wave modes in the hydrodynamic and kinetic limits. The effects of the strong interaction of dust grains and the external magnetic on these DA modes, as well as on the shear wave are examined. It is found that both the real and imaginary parts of DA waves are significantly modified in strongly coupled dusty magnetoplasmas. The implications of our results to space and laboratory dusty plasmas are briefly discussed. 展开更多
关键词 dusty plasma strongly coupled plasma MAGNETOPLASMA dielectric response function
下载PDF
The Study on the Electrorocket Engine for the Future 被引量:2
3
作者 Alexander Rubinraut 《Advances in Aerospace Science and Technology》 2017年第1期1-16,共16页
A project of electrical rocket engine of the future, which operates on principle of a magnetoplasmadynamic engine, is being considered. New concept of the superconducting magnetic system, stipulating installation of e... A project of electrical rocket engine of the future, which operates on principle of a magnetoplasmadynamic engine, is being considered. New concept of the superconducting magnetic system, stipulating installation of external field winding, in which the current is directed parallel to longitudinal axis of the engine, makes it possible to increase the magnitude of the transversal magnetic field in working chamber, to decrease the rated current and to raise the engine efficiency. On the basis of equations that describe the process of converting electrical energy into mechanical energy, a mathematical model has been composed with whose help the characteristics of magnetoplasma engine having conventional design and the characteristics of the engine being developed in the project have been determined. Conducted research has shown that new design increases engine efficiency from 50% up to 91%. The project also contains a consideration of the new engine design with movable cathode and with cathode having forced cooling which helps to reduce carryover of cathode mass and to increase lifetime by several times. In conclusion, the results of calculations and constructive development of electrorocket engine for flight towards planet Jupiter, which creates tractive force of 250 N at 2500 kW power, are given. 展开更多
关键词 MAGNETOPLASMA Electrorocket Engine SUPERCONDUCTING MAGNET System Plasma ELECTROCONDUCTIVITY CRYOSTAT Movable CATHODE Cooled CATHODE
下载PDF
Bi-Directional Excitation of Radio Frequency Waves Using a Helical Antenna in Non-Uniform Plasmas towards a Compact Magnetoplasma Thruster 被引量:1
4
作者 Yasuyoshi Yasaka Yoshifumi Hayashi +1 位作者 Hiromasa Takeno Satoshi Nakamoto 《Open Journal of Applied Sciences》 2014年第13期523-532,共10页
Magnetoplasma thruster is one of the attractive plasma engines for space propulsion in future manned deep space exploration. Usually two helical antennas are equipped to produce and heat plasmas with separate radio fr... Magnetoplasma thruster is one of the attractive plasma engines for space propulsion in future manned deep space exploration. Usually two helical antennas are equipped to produce and heat plasmas with separate radio frequency sources. It is presented in this paper that a helical antenna, which is used to launch one wave mode in one direction so far, exhibits bi-directional nature, where the waves with different mode numbers are launched and couple with electrons and ions selectively in opposite directions. A two-dimensional numerical calculation is performed to predict wave propagation and power absorption in a non-uniform hydrogen plasma immersed in a non-uniform external static magnetic field, based on the hot plasma theory. It is confirmed that appropriate choice of the excitation condition of the antenna can select axial propagation direction of specific wave modes and consequently select a species that absorbs power from generated waves. A small-scale experiment is performed to confirm the prediction of the calculation. By measuring a change in electron and ion temperatures due to the wave launch from the helical antenna, it is found that both the production and heating at different axial positions are accomplished simultaneously by one antenna showing that another type of the radio frequency driven magnetoplasma thruster would be achieved. 展开更多
关键词 PLASMA THRUSTER MAGNETOPLASMA Radio Frequency HELICAL Antenna PLASMA WAVES
下载PDF
Moonplane—A Spacecraft for Regular Delivery of Astronauts onto the Moon 被引量:1
5
作者 Alexander Rubinraut 《Advances in Aerospace Science and Technology》 2019年第3期43-56,共14页
A project of spacecraft “moonplane” for regular delivery of astronauts onto the Moon is considered. At the first stage of flight by using a carrier rocket, equipped with a chemical rocket engine, the astronauts are ... A project of spacecraft “moonplane” for regular delivery of astronauts onto the Moon is considered. At the first stage of flight by using a carrier rocket, equipped with a chemical rocket engine, the astronauts are delivered on the international space station ISS. For flights from Earth orbit into Moon orbit, the design of a moonplane “MOND”, consisting of an interorbital module and a lunar module, has been developed. The interorbital module is an electric rocket, equipped with four superconductive magnetoplasma engine MARS. To power supply of the electromotors, a solar battery of gallium arsenide is used. The design of the lunar module with cabin astronauts, which is equipped with a chemical rocket engine for landing and take-off from the surface of the Moon, is developed. A method and a device for refuelling of the electrical rocket engines with nitrogen and for refuelling of the chemical rocket engines with oxygen and hydrogen, which are stored in cryogenic tanks of the moonplane in the liquid state is developed. The developed spacecraft is capable to regularly transport four astronauts off a moorage of ISS onto the surface of the Moon and back during 6 days. The total cost delivery of one astronaut is 4 million US dollars. 展开更多
关键词 Moonplane Superconducting MAGNETOPLASMA Electrorocket Engine MARS Interorbital MODULE LUNAR MODULE Solar Battery of GALLIUM ARSENIDE
下载PDF
Drift vortices in inhomogeneous collisional dusty magnetoplasma
6
作者 杨建荣 吕岿 +3 位作者 许磊 毛杰键 刘希忠 刘萍 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第6期228-233,共6页
For the sake of investigating the drift coherent vortex structure in an inhomogeneous dense dusty magnetoplasma,using the quantum hydrodynamic model a nonlinear controlling equation is deduced when the collision effec... For the sake of investigating the drift coherent vortex structure in an inhomogeneous dense dusty magnetoplasma,using the quantum hydrodynamic model a nonlinear controlling equation is deduced when the collision effect is considered.New vortex solutions of the electrostatic potential are obtained by a special transformation method, and three evolutive cases of monopolar vortex chains with spatial and temporal distribution are analyzed by representative parameters. It is found that the collision frequency, particle density, drift velocity, dust charge number, electron Fermi wavelength, quantum correction,and quantum parameter are all influencing factors of the vortex evolution. Compared to the uniform dusty system, the vortex solutions of the inhomogeneous system present richer spatial evolution and physical meaning. These results may explain corresponding vortex phenomena and support beneficial references for the dense dusty plasma atmosphere. 展开更多
关键词 drift vortices dusty magnetoplasma quantum hydrodynamic model
下载PDF
Dust acoustic waves in collisional uniform dense magnetoplasma
7
作者 Jian-Rong Yang Ting Xu +2 位作者 Jie-Jian Mao Ping Liu Xi-Zhong Liu 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第1期298-303,共6页
In order to study the characteristics of dust acoustic waves in a uniform dense dusty magnetoplasma system, a nonlinear dynamical equation is deduced using the quantum hydrodynamic model to account for dust–neutral c... In order to study the characteristics of dust acoustic waves in a uniform dense dusty magnetoplasma system, a nonlinear dynamical equation is deduced using the quantum hydrodynamic model to account for dust–neutral collisions. The linear dispersion relation indicates that the scale lengths of the system are revised by the quantum parameter, and that the wave motion decays gradually leading the system to a stable state eventually. The variations of the dispersion frequency with the dust concentration, collision frequency, and magnetic field strength are discussed. For the coherent nonlinear dust acoustic waves, new analytic solutions are obtained, and it is found that big shock waves and wide explosive waves may be easily produced in the background of high dusty density, strong magnetic field, and weak collision. The relevance of the obtained results is referred to dense dusty astrophysical circumstances. 展开更多
关键词 dusty magnetoplasma quantum hydrodynamic model dust acoustic wave
下载PDF
TM Waves Propagation at Magnetoplasma-MTMs Interface
8
作者 Rifa J. El-Khozondar Hala J. El-Khozondar +1 位作者 Mohammed M. Shabat Alexander W. Koch 《World Journal of Condensed Matter Physics》 2012年第4期171-174,共4页
A new structure for isolator is proposed in this work. The proposed structure consists of metamaterial-magnetoplasma semiconductors parallel plate structure. The utility of magnetoplasma semiconductors is promising in... A new structure for isolator is proposed in this work. The proposed structure consists of metamaterial-magnetoplasma semiconductors parallel plate structure. The utility of magnetoplasma semiconductors is promising in developing nonreciprocal components in the submillimeter-wave and millimeter-wave bands for satellite communications. Metamaterials (MTMs) is used to enhance the behavior of the isolator. 展开更多
关键词 MAGNETOPLASMA METAMATERIALS Submilimeter WAVES ISOLATOR Nonreciprocal Components
下载PDF
Nonlinear Propagation of Positron-Acoustic Periodic Travelling Waves in a Magnetoplasma with Superthermal Electrons and Positrons
9
作者 E.F.EL-Shamy 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第6期70-74,共5页
The nonlinear propagation of positron acoustic periodic (PAP) travelling waves in a magnetoplasma composed of dynamic cold positrons, superthermal kappa distributed hot positrons and electrons, and stationary positi... The nonlinear propagation of positron acoustic periodic (PAP) travelling waves in a magnetoplasma composed of dynamic cold positrons, superthermal kappa distributed hot positrons and electrons, and stationary positive ions is examined. The reductive perturbation technique is employed to derive a nonlinear Zakharov Kuznetsov equation that governs the essential features of nonlinear PAP travelling waves. Moreover, the bifurcation theory is used to investigate the propagation of nonlinear PAP periodic travelling wave solutions. It is found that kappa distributed hot positrons and electrons provide only the possibility of existence of nonlinear compressive PAP travelling waves. It is observed that the superthermality of hot positrons, the concentrations of superthermal electrons and positrons, the positron cyclotron frequency, the direction cosines of wave vector k along the z-axis, and the concentration of ions play pivotal roles in the nonlinear propagation of PAP travelling waves. Tile present investigation may be used to understand the formation of PAP structures in the space and laboratory plasmas with superthermal hot positrons and electrons. 展开更多
关键词 Nonlinear Propagation of Positron-Acoustic Periodic Travelling Waves in a Magnetoplasma with Superthermal Electrons and Positrons
下载PDF
MARSZUG—A Space Train for Regular Delivery of Astronauts onto Mars
10
作者 Alexander Rubinraut 《Advances in Aerospace Science and Technology》 2021年第2期93-113,共21页
A project of the space train MARSZUG intended for regular delivery of astronauts to Mars is considered. In the first stage of the flight, the astronauts with the help of the carrier rocket equipped with a chemical roc... A project of the space train MARSZUG intended for regular delivery of astronauts to Mars is considered. In the first stage of the flight, the astronauts with the help of the carrier rocket equipped with a chemical rocket engine are delivered to the international space station (ISS). To deliver astronauts from Earth’s orbit to Mars orbit, a space train design consisting of two rockets, which have superconductive magnetoplasma electric engine MARS, has been developed. For the first time, a combined propulsion system MARS-M has been developed for the train movement, allowing<span style="color:red;"> </span><span style="font-family:Verdana;">carrying out the pitching, yaw and rotation of the rocket. This greatly simplifies the rocket control system and increases its reliability. The energy source of the electric engines is a sliding solar panel made of gallium arsenide. Working substance to create reactive thrust of electrorocket engines—hydrogen is stored in a liquid state in the cryogenic tank located along the longitudinal axis of the rocket. In the nasal part of the front electric rocket, a shaft rotating in a superconductive bearing is located. The shaft has a cylindrical nozzle, on which with the help of docking units two takeoff-landing capsules TLC-1 and TLC-2 are installed with which help landing and takeoff from the surface of Mars is carried out. This allows astronauts to constantly stay during the flight under the influence of gravity. To refuel the space train with liquid hydrogen in the orbit of Mars, the design of a space refueler with a chemical rocket engine is developed. The developed space train is able to regularly deliver astronauts to the surface near the northern pole of Mars.</span> 展开更多
关键词 MARS MARS-K Combined Propulsion System MARS-K Superconductive Magnetoplasma Electrorocket Engine Takeoff-Landing Capsule Space Refueler
下载PDF
Mercuryplane—A Spacecraft for Regular Delivery of Astronauts onto the Mercury
11
作者 Alexander Rubinraut 《Advances in Aerospace Science and Technology》 2020年第3期71-84,共14页
The project of “Mercuryplane”</span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">—</span><span><span ... The project of “Mercuryplane”</span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">—</span><span><span style="font-family:Verdana;">a spacecraft for regular delivery of astronauts to the planet Mercury is considered. In the first stage of the flight, with </span><span style="font-family:Verdana;">the help of a carrier rocket, equipped with a chemical rocket engine, astronauts</span><span style="font-family:Verdana;"> are delivered to the international space station ISS. A design consisting of an interorbital module and a takeoff-landing capsule has been developed to </span><span style="font-family:Verdana;">deliver astronauts from Earth’s orbit into Mercury’s orbit. The interor</span><span style="font-family:Verdana;">bital module is an electric rocket equipped with 8 superconductor magnetoplasma electric engines MARS type. The electric power supply for the engines is provided by a collapsible solar panel made of gallium arsenide. The design of the takeoff-landing capsule has been developed for landing and take-off from the surface of Mercury. A device has been developed to refuel in Earth’s orbit the electric rocket engines with nitrogen, and chemical rocket engines with oxygen and hydrogen, which are in liquid state The developed spacecraft is able to regularly deliver three astronauts from Earth orbit to the surface of Mercury within 35 days. 展开更多
关键词 Mercuryplane Superconducting Magnetoplasma Electrorocket Engine MARS Interorbital MODULE Takeoff-Landing Capsule Solar Battery Made of Gallium Arsenide
下载PDF
Landau quantization effects on damping Kawahara solitons in electron–positron–ion plasma in rotating ionized medium
12
作者 E I El-Awady S Hussain N Akhtar 《Communications in Theoretical Physics》 SCIE CAS CSCD 2024年第10期141-150,共10页
For the dynamics of three-dimensional electron–positron–ion plasmas,a fluid quantum hydrodynamic model is proposed by considering Landau quantization effects in dense plasma.Ion–neutral collisions in the presence o... For the dynamics of three-dimensional electron–positron–ion plasmas,a fluid quantum hydrodynamic model is proposed by considering Landau quantization effects in dense plasma.Ion–neutral collisions in the presence of the Coriolis force are also considered.The application of the reductive perturbation technique produces a wave evolution equation represented by a damped Korteweg–de Vries equation.This equation,however,is insufficient for describing waves in our system at very low dispersion coefficients.As a result,we considered the highest-order perturbation,which resulted in the damped Kawahara equation.The effects of the magnetic field,Landau quantization,the ratio of positron density to electron density,the ratio of positron density to ion density,and the direction cosine on linear dispersion laws as well as soliton and conoidal solutions of the damped Kawahara equation are explored.The understanding from this research can contribute to the broader field of astrophysics and aid in the interpretation of observational data from white dwarfs. 展开更多
关键词 Kawahara equation solitary and cnoidal waves quantum plasma magnetoplasmas Landau quantization Coriolis force
原文传递
Study of periodic band gap structure of the magnetized plasma photonic crystals 被引量:3
13
作者 章海峰 马力 刘少斌 《Optoelectronics Letters》 EI 2009年第2期112-116,共5页
The characteristics of the periodic band gaps of the one dimension magnetized plasma photonic crystals are studied with the piecewise linear current density recursive convolution (PLCDRC) finite-differential time-doma... The characteristics of the periodic band gaps of the one dimension magnetized plasma photonic crystals are studied with the piecewise linear current density recursive convolution (PLCDRC) finite-differential time-domain (FDTD) method. In frequency-domain, the transmission coefficients of electromagnetic Gaussian pulses are computed, and the effects of the periodic structure constant, plasma layer thickness and parameters of plasma on the properties of periodic band gaps of magnetized photonic crystals are a... 展开更多
关键词 Crystal structure Energy gap Finite difference time domain method Frequency domain analysis MAGNETOPLASMA Method of moments Photonic band gap Photonic crystals Piecewise linear techniques Time domain analysis
原文传递
Design of a broad spectrum multichannel optical filter based on FBG 被引量:2
14
作者 刘海涛 潘炜 +3 位作者 闫连山 罗宾 温坤华 冯显贵 《Optoelectronics Letters》 EI 2009年第2期131-134,共4页
To increase the channel number in the optic filter, the multiple-phase-shift (MPS) technology is adoped based on the multiple-reflection-spectrum-envelopes-concatenation (MRSEC) model which has a broadband flatness. T... To increase the channel number in the optic filter, the multiple-phase-shift (MPS) technology is adoped based on the multiple-reflection-spectrum-envelopes-concatenation (MRSEC) model which has a broadband flatness. The reflection spectra of the MPS digital concatenated sample gratings are simulated with transfer matrix method, the results show that wave band of the reflection spectrum is widened and the channel number is multiplied. What’s more, the spectrum flatness is improved with the increasing of refr... 展开更多
关键词 Fiber Bragg gratings MAGNETOPLASMA REFLECTION
原文传递
A semiclassical approach to surface Fermi arcs in Weyl semimetals 被引量:1
15
作者 Jiajia Huang Luyang Wang Dao-Xin Yao 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2022年第6期110-115,共6页
We present a semiclassical explanation for the morphology of the surface Fermi arcs of Weyl semimetals.Viewing the surface states as a two-dimensional Fermi gas subject to band bending and Berry curvatures,we show tha... We present a semiclassical explanation for the morphology of the surface Fermi arcs of Weyl semimetals.Viewing the surface states as a two-dimensional Fermi gas subject to band bending and Berry curvatures,we show that it is the non-parallelism between the velocity and the momentum that gives rise to the spiral structure of Fermi arcs.We map out the Fermi arcs from the velocity field for a single Weyl point and a lattice with two Weyl points.We also investigate the surface magnetoplasma of Dirac semimetals in a magnetic field,and find that the drift motion,the chiral magnetic effect and the Imbert-Fedorov shift are all involved in the formation of surface Fermi arcs.Our work not only provides an insightful perspective on the surface Fermi arcs and a practical way to find the surface dispersion,but also paves the way for the study of other physical properties of the surface states of topological semimetals,such as transport properties and orbital magnetization,using semiclassical methods. 展开更多
关键词 Weyl semimetals surface Fermi arcs semiclassical equations of motion Dirac semimetals surface magnetoplasma
原文传递
Vortex Street in Homogeneous Dense Dusty Magnetoplasma
16
作者 杨建荣 吴波 +2 位作者 毛杰键 刘萍 王建勇 《Communications in Theoretical Physics》 SCIE CAS CSCD 2014年第12期871-874,共4页
For studying the vortex structure in uniform dense dusty astrophysical conditions, a two-dimensional nonlinear equation is derived employing the quantum magnetoplasma hydrodynamic model and considering the strong coll... For studying the vortex structure in uniform dense dusty astrophysical conditions, a two-dimensional nonlinear equation is derived employing the quantum magnetoplasma hydrodynamic model and considering the strong collisional effect. The coherent vortex solution is obtained by perturbation analysis method. It is shown that the distribution of the electrostatic potential forms spatially a periodic vortex street, and is controlled temporally by the arbitrary function of time that may lead to abundant spacial distributions. It is found that the dust charge number,collision frequency, electron Fermi wavelength and quantum correction all play significant roles to the spatial distribution of vortex street. 展开更多
关键词 DUSTY MAGNETOPLASMA quantum HYDRODYNAMIC model VORTEX STREET
原文传递
Quadruple Gaussian Laser Beam Profile Dynamics in Collisionless Magnetized Plasma
17
作者 Shivani Vij Munish Aggarwal 《Communications in Theoretical Physics》 SCIE CAS CSCD 2018年第9期317-324,共8页
This paper presents an investigation of self-focusing of a quadruple Gaussian laser beam in collisionless magnetized plasma.The nonlinearity due to ponderomotive force which arises on account of nonuniform intensity d... This paper presents an investigation of self-focusing of a quadruple Gaussian laser beam in collisionless magnetized plasma.The nonlinearity due to ponderomotive force which arises on account of nonuniform intensity distribution of the laser beam is considered.The nonlinear partial differential equation governing the evaluation of complex envelope in the slowly varying envelope approximation is solved using a paraxial formalism.The self-focusing mechanism in magnetized plasma,in the presence of self-compression mechanism will be analyzed in contrast to the case in which it is absent.It can be observed that,in case of ponderomotive nonlinearity,the self-compression mechanism obstructs the pulse self-focusing above a certain intensity value.The effect of an external magnetic field is to generate pulses with smaller spot size and shorter compression length.The lateral separation parameter and the initial intensity of the laser beam play a crucial role on focusing and compression parameters.Also,the three-dimensional analysis of pulse propagation is presented by coupling the self-focusing equation with the self-compression one. 展开更多
关键词 SELF-FOCUSING quadruple Gaussian beam MAGNETOPLASMA SPATIOTEMPORAL ponderomotive force
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部