نتایج جستجو برای: charged particles

تعداد نتایج: 196971  

2017
M. Cerkaski A. Puente

We discuss basic principles of self-organization of a finite number of charged particles interacting via the 1/r Coulomb potential in a disk geometry. The analysis is based on the cyclic symmetry and periodicity of the Coulomb interaction between particles located on several rings. As a result, a system of equations is derived, which provides the shell structure exhibited by charged particles. ...

Journal: :The Journal of chemical physics 2012
David A Bonhommeau Riccardo Spezia Marie-Pierre Gaigeot

The surface composition of charged Lennard-Jones clusters A(N) (n+), composed of N particles (55 ≤ N ≤ 1169) among which n are positively charged with charge q, thus having a net total charge Q = nq, is investigated by Monte Carlo with Parallel Tempering simulations. At finite temperature, the surface sites of these charged clusters are found to be preferentially occupied by charged particles c...

آفریده, حسین, سو چای, جونگ, شریفی اسدی ملفه, محمدصالح, قرقره‌چی, میترا,

The electric field in cavity accelerates charged particles and magnetic field of magnets changes the direction of these particles in cyclotrons. In order to establish the electric field inside the cavity, a noiseless radio frequency (RF) signal should be generated, amplified and sent to cavity. The resonant frequency of the cavity could be changed by temperature variation. Variation of resonant...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2003
J A Drocco C J Olson Reichhardt C Reichhardt B Jankó

We consider a system of charged particles interacting with an unscreened Coulomb repulsion in a two-dimensional parabolic confining trap. The static charge on a portion of the particles is twice as large as the charge on the remaining particles. The particles separate into a shell structure with those of greater charge situated farther from the center of the trap. As we vary the ratio of the nu...

Journal: :iranian journal of oil and gas science and technology 0
sajedeh shahsavari assistant professor, department of chemistry, payame noor university, tehran, iran alireza ganjovi professor ,photonics research institute, institute of science and high technology and environmental sciences, graduate university of advanced technology, kerman, iran alireza ahmadi associate professor,department of mechanical engineering, graduate university of advanced technology, kerman, iran fahimeh shojaei 2 associate professor ,photonics research institute, institute of science and high technology and environmental sciences, graduate university of advanced technology, kerman, iran 3 associate professor,department of mechanical engineering, graduate university of advanced technology

in this paper, using a one-dimensional simulation model, the reforming process of sour gas, i.e. ch4, co2, and h2s, to the various charged particles and syngas in a dielectric barrier discharge (dbd) reactor is studied. an electric field is applied across the reactor radius, and thus a non-thermal plasma discharge is formed within the reactor. based on the space-time coupled finite element meth...

Alireza Ganjovi, Zahra Dehghani Fard

In this paper, the effects of plasma discharge parameters on the nano particles formation process in a plasma enhanced chemical vapor deposition (PECVD) reactor using a model based on equations of ionization kinetics for different active species are studied. A radio frequency applied electric field causes ionization inside the reactor and consequently different reaction schemically active speci...

2004
Gisela Pöplau Daniel Potts Ursula van Rienen

The fast calculation of space-charge fields of bunches of charged particles in three dimensional space is a demanding problem in accelerator design. Since particles of equal charge repel each other due to space-charge forces, it is difficult to pack a high charge in a small volume. For this reason, the calculation of space-charge forces is an important part of the simulation of the behaviour of...

1996
Naomichi Suzuki Minoru Biyajima Noriaki Nakajima

Newly reported normalized cumulant moments of charged particles in ee collisions by the SLD collaboration are analyzed by the truncated modified negative binomial distribution (MNBD) and the negative binomial distribution (NBD). Calculated result by the MNBD describes the oscillatory behavior of the data much better than that by the NBD. PACS number(s): 13.65.+i, 34.10.+x Normalized cumulant mo...

2005
Gisela Pöplau Daniel Potts Ursula van Rienen

The fast calculation of space-charge fields of bunches of charged particles in three dimensional space is a demanding problem in accelerator design. Since particles of equal charge repel each other due to space-charge forces, it is difficult to pack a high charge in a small volume. For this reason, the calculation of space-charge forces is an important part of the simulation of the behaviour of...

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