نتایج جستجو برای: external magneticfield

تعداد نتایج: 190253  

2001
C. D. Dermer

The measured spectral energy distribution and variability time scale are used to determine the radiation and magneticfield energy densities in the relativistic plasma that forms the gamma-ray emitting jet in the blazar 3C 279. Assuming that protons are accelerated as efficiently as electrons to a maximum energy determined by the size and magnetic field of the emitting region, we calculate the e...

Journal: :Ukrainian Journal of Physics 2022

The self-rotation of dust particles in a magnetic field up to 0.02 T is researched. stratified glow discharge and coaxial magneticfield are used. hollow glass microspheres, whose horizontal deflection observed. dependences the rotation frequency direction grains on magnitude superimposed studied. hysteresis effect particle at variation intensity examined.

2000
Yoshihiro Nishiyama

Ground state of the two-dimensional hard-core-boson model subjected to external magnetic field and quenched random chemical potential is studied numerically. In experiments, magneticfield-tuned superconductor-insulator transition has already come under through investigation, whereas in computer simulation, only randomness-driven localization (with zero magnetic field) has been studied so far: T...

Journal: :Magnetochemistry 2021

In this study, the external magnetic field emitted by a wireless power transfer (WPT) system and internal electric induced in human body models during recharging operations of compact vehicle (EV) are evaluated. The magneticfield is calculated with hybrid scheme coupling boundary element method surface impedance conditions order to fit multiscale open-boundary characteristics problem. A commerc...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران - دانشکده علوم انسانی و اجتماعی 1392

tourism , today as one of the ways to make money, create jobs , and social and political interactions is considered. this paper aims to examine the strengths and weaknesses of tourism development in mahmoud abad ( mazandaran ). the research method in this study is " descriptive - analytical " and to collection of data used field methods such as questionnaires and documentation - library. the sa...

1999
Tzuu-Kang Chyi Chien-Wen Hwang W. F. Kao Guey-Lin Lin Kin-Wang Ng Jie-Jun Tseng

We study the neutrino-photon processes such as γγ → νν̄ and νγ → νγ in a background magnetic field smaller than the critical magnetic field Bc ≡ me/e. Using Schwinger’s proper-time method, we extract leading magneticfield contributions to the above processes. Our result is valid throughout the kinematic regime where both neutrino and photon energies are significantly smaller than mW . We briefly...

2005
Po Gyu Park V. Ya. Shifrin V. N. Khorev Y. G. Kim

− The proton gyromagnetic ratio (γ'P) plays a fundamental role in achieving highly accurate magneticfield measurements. At the KRISS complex for the determination of the proton gyromagnetic ratio, we have improved a magnetic-field standard based on the value of γ'P and related techniques. The standard for measuring DC magnetic flux density is intended to cover the range from 20 μT to 2.5 T, wit...

2003
Sheng-Jui Chen

We have built and tested a 3.5 m high-finesse Fabry-Perot prototype inteferometer with a precision ellipsometer for the QED test and axion search (Q & A) experiment. We use X-pendulum-double-pendulum suspension designs and automatic control schemes developed by the gravitational-wave detection community. Verdet constant and Cotton-Mouton constant of the air are measured as a test. Double modula...

2017
F. Rohlfing

We study narrow ballistic Josephson weak links in an InAs quantum well contacted by Nb electrodes. Measurements of the conductance, excess and critical currents reveal a dramatic magneticfield suppression of the Andreev reflection amplitude, which occurs even for in-plane field orientation with essentially no magnetic flux through the junction. Our observations demonstrate the presence of an ad...

2001
Holger Gies Kurt Langfeld

We propose a numerical technique for calculating effective actions of electromagnetic backgrounds based on the worldline formalism. As a conceptually simple example, we consider scalar electrodynamics in three dimensions to one-loop order. Beyond the constant-magneticfield case, serving as a benchmark test, we analyze the effective action of a step-function-like magnetic field – a configuration...

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