electro magnetic
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2022 ◽  
Author(s):  
Azad Hussain ◽  
Sobia Akbar ◽  
Muhammad Arshad ◽  
Sohail Nadeem

Abstract The probation is made to study the stagnation point flow of non-Newtonian fluid for Riga plate. Electric potential and magnetic flux density with time dependent flow is examined. Mesh for electric potential, magnetic flux, laminar flow with physics controlled fine, finer and extra finer option is also represented in details. Inquisition is solved in COMSOL Multi-physics 5.4 to obtain the results of surface magnitude, counter, table surface, magnetic flux, electric potential and coarse mesh for velocity, pressure, magnetic and electric fields. Coarse mesh of electric insulation and magnetic flux of the geometry is created with 6067, 18688 domain elements and 901, 1448 boundary elements. Tables for velocity surface, mesh domain, quadrilateral and triangular elements are also presented. Obtained results are discussed with graphs and tables in details.


2022 ◽  
Vol 974 ◽  
pp. 115625
Author(s):  
Alice Aldi ◽  
Massimo Bianchi ◽  
Maurizio Firrotta
Keyword(s):  

2022 ◽  
Vol 130 (2) ◽  
pp. 273
Author(s):  
В.Г. Фарафонов ◽  
В.Б. Ильин ◽  
Д.Г. Туричина

The relations between the T-matrices emerging when solving the problem of light scattering by a spheroid by applying the expansions of the electro-magnetic fields in the employing spheroidal and spherical bases are found. The behavior of the obtained relations is numerically studied, and it is noted that in a wide range of the task parameter values the calculation of the spheroidal T-matrix and its corresponding transformation is the only practical way to derive the spherical T-matrix often used in applications.


2021 ◽  
Author(s):  
Sangwha Yi

We find Einstein’s notational equation of the electro-magnetic field equation and the electromagneticfield in Rindler space-time. Because, electromagnetic fields of the accelerated frame include in general relativity theory.


Author(s):  
Jingchao Liu ◽  
Lin Xu ◽  
Li Bai ◽  
Mohamed Amine Khadimallah

2021 ◽  
Author(s):  
Sangwha Yi

In the general relativity theory, we find electro-magnetic wave functions of Cosmic Microwave Background and Schwarzschild space-time. Specially, this article is that electromagnetic wave equations are treated by gauge fixing equations in Robertson-Walker space-time and Schwarzschild space-time.


2021 ◽  
Author(s):  
Sangwha Yi

In the general relativity theory, we find the electro-magnetic wave function and equation in Rindlerspace-time. Specially, this article is that electromagnetic wave equation is corrected by the gauge fixingequation in Rindler space-time. We define the force in Rindler space-time We find Lorentz force(electromagnetic force) by electro-magnetic field transformations in Rindler space-time. In the inertial frame, Lorentz force is defined as 4-dimensional force. Hence, we had to obtain 4-dimensional force in Rindler space-time. We define energy-momentum in Rindler space-time.


2021 ◽  
Author(s):  
Sangwha Yi

In the special relativity theory, we study the gauge theory in the electro-magnetic field theory.Using that the Electro-magnetic potential is 4-vector, we treat the invariant potential. Electro-magnetic field theory’s the gauge theory is expanded


By quantizing space-time in such a way that I can calculate all of the constants of physics and derive and explain every equation therein. The magnetic field appears when the electric field seems to travel faster than c. The same way an “anti-gravity” perpendicular field appears, totally depended on relative velocities, since the electric and gravitational forces are made of the micro field lines and are different aspects of the same force [1]. The “gravitational” perpendicular force can be repellant, when masses travel in the same direction, (massive distant galaxies repel enlarging the universe, new current mass just being released) and it can be attractive (opposite spiral arms moving in opposite directions, combined with a super-massive black hole). The recent detection of gravity waves, is clear evidence for all of this since these waves need a perpendicular field, like electro-magnetic waves. The magnetic style of the perpendicular field, at extremely high can cause matter and dark to interact


Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 38
Author(s):  
Tomasz Kowalski ◽  
Gian Piero Gibiino ◽  
Jarosław Szewiński ◽  
Krzysztof Czuba ◽  
Dominik Rybka ◽  
...  

The low-level radio frequency (LLRF) control system is one of the fundamental parts of a particle accelerator, ensuring the stability of the electro-magnetic (EM) field inside the resonant cavities. It leverages on the precise measurement of the field by in-phase/quadrature (IQ) detection of an RF probe signal from the cavities, usually performed using analogue downconversion. This approach requires a local oscillator (LO) and is subject to hardware non-idealities like mixer nonlinearity and long-term temperature drifts. In this work, we experimentally evaluate IQ detection by direct sampling for the LLRF system of the Polish free electron laser (PolFEL) now under development at the National Centre for Nuclear Research (NCBJ) in Poland. We study the impact of the sampling scheme and of the clock phase noise for a 1.3-GHz input sub-sampled by a 400-MSa/s analogue-to-digital converter (ADC), estimating amplitude and phase stability below 0.01% and nearly 0.01°, respectively. The results are in line with state-of-the-art implementations, and demonstrate the feasibility of direct sampling for GHz-range LLRF systems.


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