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We have demonstrated experimentally that the main breakdown-triggering mechanism in most gaseous detectors, including micropattern gaseous detectors, is sporadic electron jets from the cathode surfaces. Depending on conditions, each jet…

仪器与探测器 · 物理学 2016-11-17 C. Iacobaeus , M. Danielsson , P. Fonte , T. Francke , J. Ostling , V. Peskov

This report summarizes the present knowledge on discharges in micropattern and small gap gaseous detectors and the physical mechanisms involved. These include the space-charge (Raether's) limit, rate-induced breakdown, cathode excitation…

仪器与探测器 · 物理学 2009-11-04 V. Peskov , P. Fonte

We study the dynamic contraction a self-sustained glow discharge in air in a rectangular duct with convective cooling. A two dimensional numerical model of the plasma contraction was developed in a cylindrical frame. The process is…

等离子体物理 · 物理学 2014-04-02 M. N. Shneider , M. S. Mokrov , G. M. Milikh

The dynamics of a coupled two-component nonequilibrium system is examined by means of continuum field theory representing the corresponding master equation. Particles of species A may perform hopping processes only when particles of…

统计力学 · 物理学 2009-10-31 S. Trimper , U. C. Taeuber , G. M. Schuetz

The problem of the diffusion evolution of a pore filled with molecular hydrogen in a spherical granule in a hydrogen medium is solved. The initial position of the pore is displaced relative to the center of the granule. A nonlinear system…

介观与纳米尺度物理 · 物理学 2022-03-31 M. I. Kopp , P. N. Ostapchuk , V. V. Yanovsky

Aerobreakup of fluid droplets under the influence of impulsively generated high-speed gas flow using an open-ended shock tube is studied using experiments and numerical simulations. Breakup of mm-sized droplets at high Weber number was…

流体动力学 · 物理学 2022-06-24 James Leung , Mohana Gurunadhan , Shyam Menon

We present a fully nonlinear hydrodynamic 'shallow water' model of the solar tachocline. The model consists of a global spherical shell of differentially rotating fluid, which has a deformable top, thus allowing motions in radial directions…

太阳与恒星天体物理 · 物理学 2011-11-22 Mausumi Dikpati

Employing a long-wave mesoscopic hydrodynamic model for the film height evolution we study ensembles of pinned and sliding drops of a volatile liquid that continuously condense onto a chemically heterogeneous inclined substrate. Our…

流体动力学 · 物理学 2019-11-05 Sebastian Engelnkemper , Uwe Thiele

Starting as highly relativistic collimated jets, gamma-ray burst outflows gradually decelerate and become non-relativistic spherical blast waves. Although detailed analytical solutions describing the afterglow emission received by an…

高能天体物理现象 · 物理学 2015-05-19 Hendrik van Eerten , Weiqun Zhang , Andrew MacFadyen

Despite a rigorous analysis of nonlinear electrohydrodynamics of a liquid droplet deformation in air, its influence on the surrounding gas phase has received less attention. We observed, air circulations created due to large deformation…

流体动力学 · 物理学 2022-03-08 Pramodt Srinivasula , Debabrat Biswal

(Abridged) The question of how most stars in the Universe form remains open. While star formation predominantly occurs in young massive clusters, the current framework focuses on isolated star formation. One way to access the bulk of…

星系天体物理 · 物理学 2022-11-23 K. M. Dutkowska , L. E. Kristensen

The outflow of an object traveling in a fluid can shape the fluid morphology by forming a forward bow shock which accelerates the object via gravitational feedback. This dynamical effect, namely "dynamical anti-friction", has been studied…

太阳与恒星天体物理 · 物理学 2022-06-29 Lile Wang , Xinyu Li

Consider a chaotic dynamical system generating Brownian motion-like diffusion. Consider a second, non-chaotic system in which all particles localize. Let a particle experience a random combination of both systems by sampling between them in…

混沌动力学 · 物理学 2019-05-01 Y. Sato , R. Klages

A pin liquid anode DC discharge is generated in open air without any additional gas feeding to form self-organized patterns (SOPs) on various liquid interfaces. Axially resolved emission spectra of the whole discharge reveal that the…

等离子体物理 · 物理学 2019-11-26 Shiqiang Zhang , Thierry Dufour

The generation and evolution of nonlinear waves in microwave amplifiers such as travelling wave tubes, free electron lasers and klystrons have been studied. The analysis is based on the hydrodynamic and field equations for the…

加速器物理 · 物理学 2007-05-23 Stephan I. Tzenov

We present full-time-domain, moving-mesh, relativistic hydrodynamic simulations of jets launched from the center of a massive progenitor star and compute the resulting synchrotron light curves for observers at a range of viewing angles. We…

高能天体物理现象 · 物理学 2019-08-14 Xiaoyi Xie , Andrew MacFadyen

Active matter comprises self-driven units, such as bacteria and synthetic microswimmers, that can spontaneously form complex patterns and assemble into functional microdevices. These processes are possible thanks to the out-of-equilibrium…

In given article preliminary results of the research of the electron multiplication in MPGD are presented at a high level of alpha-particles background. This work has expanded borders of understanding of the streamer mode nature. It is seen…

仪器与探测器 · 物理学 2010-09-16 V. I. Razin , A. I. Reshetin

We investigate by molecular dynamics simulations [arXiv:1412.4537 [physics.plasm-ph], arXiv:1608.06789 [physics.plasm-ph]] a beam of electrons released via field emission from a planar cathode surface of 1 ${\rm \mu m}^2$ with an…

等离子体物理 · 物理学 2021-03-22 Kristinn Torfason , Anna Sitek , Andrei Manolescu , Ágúst Valfells

In the present article we carry out a molecular dynamics study of the core-softened system and show that the existence of the water-like anomalies in this system depends on the trajectory in $P-\rho-T$ space along which the behavior of the…

软凝聚态物质 · 物理学 2015-05-28 Yu. D. Fomin , V. N. Ryzhov , E. N. Tsiok