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In this survey article, we present two applications of surface curvatures in theoretical physics. The first application arises from biophysics in the study of the shape of cell vesicles involving the minimization of a mean curvature type…

数学物理 · 物理学 2024-06-14 Yisong Yang

Based on the consideration of increasing the number of initial electrons and providing an appropriate distribution of electric field strength for discharge space, a method of adopting the wire-cylindrical type electrode structure with a…

等离子体物理 · 物理学 2020-08-26 Shuai Zhao , Yong Hao , Tao Qiao , Weisheng Cui

Application of a sufficiently strong electric field to an aqueous solution induces a phenomenon known as `electrohydraulic discharge'. The electric field causes the water to break down, generating either a corona (at lower field strengths)…

流体动力学 · 物理学 2010-10-19 John C. Creasey , Brad S. Hamlin , William D. Ristenpart

Context. The origin of the heating of the solar atmosphere is still an unsolved problem. As the photosphere and chromosphere radiate more energy than the solar corona, it is challenging but important to reveal all the mechanisms that…

太阳与恒星天体物理 · 物理学 2021-08-25 R. Niedziela , K. Murawski , S. Poedts

The collision of two expanding plasma clouds is investigated, emphasizing instabilities and electron energization in the plasma mixing layer. This work is directly relevant to laboratory experiments with explosively-created laser or z-pinch…

等离子体物理 · 物理学 2022-08-24 M. A. Malkov , V. I. Sotnikov

Theoretical approaches to low-frequency magnetized turbulence in collisionless and weakly collisional astrophysical plasmas are reviewed. The proper starting point for an analytical description of these plasmas is kinetic theory, not fluid…

天体物理学 · 物理学 2009-11-11 A. A. Schekochihin , S. C. Cowley , W. Dorland

We present a design and characterization of optically transparent electrodes suitable for atomic and molecular physics experiments where high optical access is required. The electrodes can be operated in air at standard atmospheric pressure…

仪器与探测器 · 物理学 2016-04-20 Will Gunton , Gene Polovy , Mariusz Semczuk , Kirk W. Madison

In this work we are going to perform a simulation of a positive corona discharge in nitrogen gas, using two different asymmetric capacitor geometries. This work represents an improvement over previous work in order to accomplish higher ion…

等离子体物理 · 物理学 2012-02-22 Alexandre A. Martins

We study the mean-square displacement (MSD) of a tracer particle diffusing in a granular gas of inelastic hard spheres under homogeneous cooling state (HCS). Tracer and granular gas particles are in general mechanically different. Our…

统计力学 · 物理学 2026-01-29 Santos Bravo Yuste , Rubén Gómez González , Vicente Garzó

One of the most interesting phenomena in the ultracold plasmas are multiple subharmonics of the electron emission observed after its irradiation by the monochromatic radiowaves. Unfortunately, the early interpretation of this phenomenon as…

等离子体物理 · 物理学 2025-04-21 Yurii V. Dumin , Ludmila M. Svirskaya

Motivated by obtaining a consistent mathematical description for the radiation reaction of point charged particles in linear classical electrodynamics, a theory of generalized higher order tensors and differential forms is introduced. The…

微分几何 · 数学 2013-09-20 Ricardo Gallego Torromé

Twisted magnetic fields should be ubiquitous in flare-producing active regions where the magnetic fields are strongly non-potential. It has been shown that reconnection in helical magnetic coronal loops results in plasma heating and…

太阳与恒星天体物理 · 物理学 2016-01-20 R. F. Pinto , M. Gordovskyy , P. K. Browning , N. Vilmer

Discharges in hydrogen at pressures above $1\,$kPa and a reduced electric field of $E/N=100-200\,$Td show a characteristic current oscillation in Pulsed Townsend experiments. This is explained by secondary emission of electrons from the…

等离子体物理 · 物理学 2018-02-09 Andreas Hösl , Christian Michael Franck

Electron trapping following exposition to ionising radiations and consequent electron release during variation of temperature in solids represent processes happening at the quantum microphysical level. The interesting feature of the…

综合物理 · 物理学 2008-12-05 Elio Conte , Joseph P. Zbilut

Understanding the formation and long-timescale evolution of atmospheric plasmas produced by ultrashort, long wavelength IR (LWIR) pulses is an important but partially understood problem. Of particular interest are plasmas produced in air…

等离子体物理 · 物理学 2022-05-18 E. Welch , D. Matteo , S. Tochitsky , G. Louwrens , C. Joshi

(Abridged) We describe the cascade of plasma waves or turbulence injected, presumably by reconnection, at scales comparable to the size of a solar flare loop to scales comparable to particle gyroradii, and evaluate their damping by various…

天体物理学 · 物理学 2009-11-13 Vahe Petrosian , Huirong Yan , Alex Lazarian

We study the gamma-ray emission patterns and light curves in dissipative pulsar magnetospheres. We produce the gamma-ray light curves by using the geometric method and the particle trajectory method. For the geometric method, assuming the…

高能天体物理现象 · 物理学 2019-04-10 Gang Cao , Xiongbang Yang

Based on a semi-empirical generalized Anderson-Newns model we construct a pseudo-particle description for electron emission due to de-excitation of metastable molecules at surfaces. The pseudo-particle approach allows us to treat resonant…

强关联电子 · 物理学 2015-06-05 Johannes Marbach , Franz Xaver Bronold , Holger Fehske

The properties of a partially ionized plasma in a long cylindrical tube subject to a uniform axial electric field are investigated. The plasma is maintained by an external ionizing source balanced by bulk and surface recombinations.…

等离子体物理 · 物理学 2009-10-30 Joel L. Lebowitz , Alexander Rokhlenko

The electron sheath formation in a DC magnetised plasma of modified hollow cathode source is studied. The discharge consists of two plane parallel cathodes and a small cubical anode placed off axis at the center. The argon plasma is…

等离子体物理 · 物理学 2018-08-30 R. Rane , S. Chauhan , P. Bharathi , K. Nigam , P. Bandyopadhyay , S. Mukherjee