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Visualizing the Spin & Radiation of the Extended Electron in Magnetic Field
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作者 Hoa Van Nguyen 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2024年第1期277-291,共15页
This article presents illustrations of an extended model of the electron to visualize how it spins and radiates in the external magnetic field. A time-varying magnetic field B produces a rotational induced electric fi... This article presents illustrations of an extended model of the electron to visualize how it spins and radiates in the external magnetic field. A time-varying magnetic field B produces a rotational induced electric field E which rotates (spins) the electron about its axis. In time-constant magnetic field: the electron radiates the cyclotron radiation. In time-varying magnetic field: synchrotron radiation is generated. The couplings between spin, acceleration and radiation will be discussed. 展开更多
关键词 Spinning Forces Spin by Inertia Radiating Forces Photon or static Electric Dipole Cloud of Photons Spin - Radiation Coupling
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Static electric dipole polarizability of lithium atoms in Debye plasmas 被引量:3
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作者 宁丽娜 祁月盈 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第12期180-186,共7页
The static electric dipole polarizabilities of the ground state and n ≤ 3 excited states of a lithium atom embedded in a weekly coupled plasma environment are investigated as a function of the plasma screening radium... The static electric dipole polarizabilities of the ground state and n ≤ 3 excited states of a lithium atom embedded in a weekly coupled plasma environment are investigated as a function of the plasma screening radium. The plasma screening of the Coulomb interaction is described by the Debye-Hiickel potential and the interaction between the valence electron and the atomic core is described by a model potential. The electron energies and wave functions for both the bound and continuum states are calculated by solving the SchrSdinger equation numerically using the symplectic integrator. The oscillator strengths, partial-wave, and total static dipole polarizabilities of the ground state and n ≤ 3 excited states of the lithium atom are calculated. Comparison of present results with those of other authors, when available, is made. The results for the 2s ground state demonstrated that the oscillator strengths and the static dipole polarizabilities from np orbitals do not always increase or decrease with the plasma screening effect increasing, unlike that for hydrogen-like ions, especially for 2s→3p transition there is a zero value for both the oscillator strength and the static dipole polarizability for screening length D = 10.3106a0, which is associated with the Cooper minima. 展开更多
关键词 static electric dipole polarizability Debye plasmas lithium atom
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Research on the Static Magnetic Field of Ships with Corrosion and Anticorrosion Efficacy Using Electric Dipole Model
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作者 陈聪 李定国 龚沈光 《Defence Technology(防务技术)》 SCIE EI CAS 2010年第2期133-139,共7页
In the case of three-layered(air-seawater-seabed)model,the analytical expressions of the static electric and static magnetic field produced by the static electric dipole located in seawater were derived by using the m... In the case of three-layered(air-seawater-seabed)model,the analytical expressions of the static electric and static magnetic field produced by the static electric dipole located in seawater were derived by using the mirror image theory.Combined with the distribution of the underwater electric potential measured in laboratory,an electric dipole model for physical scale of ship was established and the distribution characteristics of an actual ship' s corrosion related magnetic field were obtained.Based on established models,theoretical analysis and calculation were made to catch out the distribution characteristics of static magnetic field related with corrosion and anticorrosion,which can not be measured directly in seawater.The results show that the static magnetic field related with corrosion and anticorrosion is a kind of noteworthy obstacle signal for degaussed ships. 展开更多
关键词 weaponry engineering corrosion related magnetic field static electric field underwater electric potential mirror image theory electric dipole model
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Variation of Two-photon Absorption Cross Sections and Optical Limiting of Compounds Induced by Static Electric Field
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作者 Yu-jin Zhang Yu-zhi Song Chuan-kui Wang 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2014年第3期259-264,共6页
By numerically solving the Maxwell-Bloch equations using an iterative predictor-corrector finite-difference time-domain technique, we investigate propagating properties of a few-cycle laser pulse in a 4,4'-bis(di-n-... By numerically solving the Maxwell-Bloch equations using an iterative predictor-corrector finite-difference time-domain technique, we investigate propagating properties of a few-cycle laser pulse in a 4,4'-bis(di-n-butylamino) stilbene (BDBAS) molecular medium when a static electric field exists. Dynamical two-photon absorption (TPA) cross sections are obtained and optical limiting (OL) behavior is displayed. The results show that when the static electric field intensity increases, the dynamical TPA cross section is enhanced and the OL behavior is improved. Moreover, both even- and odd-order harmonic spectral components are generated with existence of the static electric field because it breaks the inversion symmetry of the BDBAS molecule. This work provides a method to modulate the nonlinear optical properties of the BDBAS compounds. 展开更多
关键词 static electric field Optical limiting Two-photon absorption Organic molecule
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Saturated sodium chloride solution under an external static electric field: A molecular dynamics study
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作者 任淦 王延颋 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第12期79-86,共8页
The behavior of saturated aqueous Na Cl solutions under a constant external electric field(E) was studied by molecular dynamics(MD) simulation. Our dynamic MD simulations indicated that the irreversible nucleation... The behavior of saturated aqueous Na Cl solutions under a constant external electric field(E) was studied by molecular dynamics(MD) simulation. Our dynamic MD simulations indicated that the irreversible nucleation process towards crystallization is accelerated by a moderate E but retarded or even prohibited under a stronger E, which can be understood by the competition between self-diffusion and drift motion. The former increases with E, thereby accelerating the nucleation process, whereas the latter pulls oppositely charged ions apart under a stronger E, thereby decelerating nucleation.Additionally, our steady-state MD simulations indicated that a first-order phase transition occurs in saturated solutions at a certain threshold Ec. The magnitude of Ec increases with concentration because larger clusters form more easily when the solution is more concentrated and require a stronger E to dissociate. 展开更多
关键词 NaCl solution NUCLEATION static external electric field molecular dynamics simulation
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Isolated Solid-State Packaging Technology of High-Temperature Pressure Sensor
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作者 张生才 金鹏 +2 位作者 姚素英 赵毅强 曲宏伟 《Transactions of Tianjin University》 EI CAS 2003年第4期264-268,共5页
The principle of miniature isolated solid-state encapsulation technology of high-temperature pressure sensor and the structure of packaging are discussed, including static electricity bonding, stainless steel diaphrag... The principle of miniature isolated solid-state encapsulation technology of high-temperature pressure sensor and the structure of packaging are discussed, including static electricity bonding, stainless steel diaphragm selection and rippled design, laser welding, silicon oil infilling, isolation and other techniques used in sensor packaging, which can affect the performance of the sensor. By adopting stainless steel diaphragm and high-temperature silicon oil as isolation materials, not only the encapsulation of the sensor is as small as 15 mm in diameter and under 1 mA drive, its full range output is 72 mV and zero stability is 0.48% F.S/mon, but also the reliability of the sensor is improved and its application is widely broadened. 展开更多
关键词 high-temperature pressure sensor static electricity bonding isolated solid-state silicon oil infilling
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A Boundary Integral Equation Approach for Boundary Problem of Laplace Equation 被引量:2
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作者 孙建设 叶留青 《Chinese Quarterly Journal of Mathematics》 CSCD 2003年第4期429-434,共6页
Using the second Green formula, the boundary problem of Laplace equation satisfied by potential function of static electric field is transformed to the problem of the boundary integral equation, and then a boundary in... Using the second Green formula, the boundary problem of Laplace equation satisfied by potential function of static electric field is transformed to the problem of the boundary integral equation, and then a boundary integral equation approach is established by partitioning boundary using linear boundary element. 展开更多
关键词 Laplace equation boundary problem static electric field linear boundary element.
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Distribution of static equilibrium points in static electric field produced by fixed electrons
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作者 GUO Feng 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2014年第4期92-95,共4页
Fix n electrons on the disk |z|≤R. They generate a static electric field. Let a be an electron located in the disk |z|≤R sin π/n. It shows that the closed disk with center a and radius R contains at least one s... Fix n electrons on the disk |z|≤R. They generate a static electric field. Let a be an electron located in the disk |z|≤R sin π/n. It shows that the closed disk with center a and radius R contains at least one static equilibrium point. 展开更多
关键词 fixed electrons static electric field static equilibrium points
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Methanol adsorption studies of electrified ACF by MD simulations
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作者 LIANG Shiqiang XU Jingzhong 《Science China(Technological Sciences)》 SCIE EI CAS 2004年第6期667-675,共9页
In order to clarify whether static electricity can impose a control on physical adsorption of polar adsorbates, MD simulations were carried out to study the adsorption/desorption behavior of methanol in the nanopores ... In order to clarify whether static electricity can impose a control on physical adsorption of polar adsorbates, MD simulations were carried out to study the adsorption/desorption behavior of methanol in the nanopores of electrified activated carbon fiber (ACF). Some special phenomena were observed from the MD simulations for methanol adsorption in a mesopore of electrified ACF. For example it takes a shorter time for the adsorbates to reach the adsorption sites on the mesopore wall, the liquid-like methanol is highly condensed, the methanol molecules have a unique distribution of space orientation, and the total energy of equilibrium state dropped a lot. These phenomena indicate the static electricity reinforced the interaction between the polar methanol and the electrified ACF, so that the intensity, stability and regularity of adsorption were increased, and thus we predict that the adsorption capacity will be increased and the adsorption process will be accelerated. When adsorption equilibrium was reached at room temperature, eliminated the electric charges and heated the system, the desorption tendency was evidently observed from our simulations at 60°C or so. 展开更多
关键词 ACF METHANOL ADSORPTION MD static electricity
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Modified Nonlinear Model of Arcsin-Electrodynamics
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作者 S.I.Kruglov 《Communications in Theoretical Physics》 SCIE CAS CSCD 2016年第7期59-65,共7页
A new modified model of nonlinear arcsin-electrodynamics with two parameters is proposed and analyzed.We obtain the corrections to the Coulomb law. The effect of vacuum birefringence takes place when the external cons... A new modified model of nonlinear arcsin-electrodynamics with two parameters is proposed and analyzed.We obtain the corrections to the Coulomb law. The effect of vacuum birefringence takes place when the external constant magnetic field is present. We calculate indices of refraction for two perpendicular polarizations of electromagnetic waves and estimate bounds on the parameter γ from the BMV and PVLAS experiments. It is shown that the electric field of a point-like charge is finite at the origin. We calculate the finite static electric energy of point-like particles and demonstrate that the electron mass can have the pure electromagnetic nature. The symmetrical Belinfante energy-momentum tensor and dilatation current are found. We show that the dilatation symmetry and dual symmetry are broken in the model suggested. We have investigated the gauge covariant quantization of the nonlinear electrodynamics fields as well as the gauge fixing approach based on Dirac's brackets. 展开更多
关键词 vacuum birefringence energy-momentum tensor static electric energy dilatation current dual symmetry quantization Dirac's brackets
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