field influence
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2022 ◽  
Vol 130 (1) ◽  
pp. 151
Author(s):  
Е.A. Смирнова ◽  
Н.А. Лозинг ◽  
М.Г. Гладуш ◽  
А.В. Наумов

The current paper demonstrates theoretical analysis of two types of spectral curves for several configurations of system of two-level light emitters, considering the influence of local field and close environment inside a transparent medium. Probe field absorption spectra and resonant fluorescence spectra are calculated under excitation of a strong monochromatic cw laser. The sensitivity of absorption and emission optical spectroscopy method is compared for revealing the effects of the medium on individual emitters and their ensembles. Spectral curves were calculated for model emitters considering local field influence of a transparent dielectric medium and local electron-phonon interactions, which determined the response of the emitters to an external laser field and effective relaxation mechanisms. The calculation formalism is based on a semiclassical approach, while the relaxation processes associated with the phonon contribution are introduced phenomenologically with references to other studies.


2021 ◽  
Vol 937 (4) ◽  
pp. 042063
Author(s):  
I A Zyryanov ◽  
A P Pozolotin ◽  
A G Budin

Abstract Polymer waste disposal of is one of the most pressing problems of our time. The incineration method is widespread, but it has its drawbacks. Problems during the polymer waste combustion, which include low combustion efficiency, combustion products toxicity, significantly reduce the possibility of waste disposal incinerators using. In this regard, the work considers the use of an electrostatic field to optimize the combustion process. Experimental studies of the electrostatic field influence on the substances difficult for disposal (polyethylene, polypropylene, polystyrene, rubber) combustion have been carried out. The possibility of increasing the polymer waste combustion rate, flame temperature, and combustion efficiency is shown.


Electronics ◽  
2021 ◽  
Vol 10 (23) ◽  
pp. 2894
Author(s):  
Mikhail Tarasov ◽  
Aleksandra Gunbina ◽  
Mikhail Fominsky ◽  
Artem Chekushkin ◽  
Vyacheslav Vdovin ◽  
...  

Samples of superconductor–insulator–superconductor (SIS) and normal metal–insulator–superconductor (NIS) junctions with superconducting aluminum of different thickness were fabricated and experimentally studied, starting from conventional shadow evaporation with a suspended resist bridge. We also developed alternative fabrication by magnetron sputtering with two-step direct e-beam patterning. We compared Al film grain size, surface roughness, resistivity deposited by thermal evaporation and magnetron sputtering. The best-quality NIS junctions with large superconducting electrodes approached a resistance R(0)/R(V2Δ) factor ratio of 1000 at 0.3 K and over 10,000 at 0.1 K. At 0.1 K, R(0) was determined completely by the Andreev current. The contribution of the single-electron current dominated at V > VΔ/2. The single-electron resistance extrapolated to V = 0 exceeded the resistance R(V2Δ) by 3 × 109. We measured the influence of the magnetic field on NIS junctions and described the mechanism of additional conductivity due to induced Abrikosov vortices. The modified shape of the SINIS bolometer IV curve was explained by Joule overheating via NIN (normal metal–insulator–normal metal) channels.


2021 ◽  
Vol 2064 (1) ◽  
pp. 012039
Author(s):  
N V Mamedov ◽  
A S Rohmanenkov ◽  
A A Solodovnikov

Abstract In this work characteristics of pulsed penning ion source for miniature linear accelerators was investigated by experimental measurements and PIC (Particle-In-Cell) simulations. The paper presents dependences of the discharge current and extracted current on intensities of the uniform magnetic field for different pressure. Also, typical examples of the current pulse waveforms obtained by PIC simulation and experiment for different magnetic field are presented. The simulated electron and ion distributions inside discharge gap give qualitative explanation of the experimentally observed fluctuations in current pulses. These current fluctuations arise as a result of the violation of the electric field axial symmetry due to the electron spoke movement of the towards the anode.


Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6388
Author(s):  
Rafał Tarko ◽  
Konrad Kochanowicz ◽  
Wiesław Nowak ◽  
Waldemar Szpyra ◽  
Tadeusz Wszołek

The growing interest in the negative environmental impact of overhead power lines of high and extra-high voltage stems from the increasing ecological awareness of societies. Consequently, a number of respective legal restrictions have been issued and actions have been undertaken to reduce this impact, especially in the electric field of the power frequency. The aim of this paper is to analyze the possibilities of reducing the width of electric field influence zones by changing the design parameters of power lines and defining the spatial distribution of its conductors. This analysis was carried out using the developed and experimentally verified models for determining the electric field and audible noise in the power line environment. The computational models were used to analyze the width of the electric field influence zones of 400 kV lines and the noise levels at the borders of these zones. The research focused on single and double circuit 400 kV power lines. It was revealed that a reduction in electric field emissions is accompanied by an increase in noise emission. However, the analyses confirmed that the width of the electric field influence zones can be significantly reduced if the most important design and construction parameters of the line are properly selected. The obtained conclusions are valid not only for 400 kV lines, but also set directions to follow when changing the parameters of high voltage transmission lines of other rated voltages (above 100 kV).


Author(s):  
Tristan Weber ◽  
David Brain ◽  
Shaosui Xu ◽  
David Mitchell ◽  
Jared Espley ◽  
...  

Author(s):  
Ebenezer Olubunmi Ige ◽  
Funmilayo Helen Oyelami ◽  
Emmanuel Segun Adedipe ◽  
Iskander Tlili ◽  
M. Ijaz Khan ◽  
...  

Nanoparticles-based infusion strategies are presently being employed for a range of clinical interventions either for in vivo or in vitro applications while imposition of magnetic field is also identified as an important technique for fluid manipulation during nanoparticles-based propulsion. The impact of magnetic field to control of the transport of nanoparticles-based blood flow is demonstrated numerically over an elaborate variant of transport mechanisms. Mathematical formulations were undertaken and stability analysis of the mathematical problem was a scrutinized by generation of eigen values using the Lyapunov scheme. The numerical solution based on Chebysehev pseudo-spectra and spectra homotopy analysis method (SHAM) was implemented to handle the combination on nonlinear ordinary differential equations derived from the transport models. We observed that far-field of the stagnation point, nanoparticles specie dispersion increased with higher thermal diffusivity, while the decrease in concentration profile around the vicinity of stagnation point depicts clustering of nanoparticles-embedded blood flow. The observations revealed that higher magnitude of thermophoretic parameters constitute significantly to increase in momentum as well as energy fields during transport of nanoparticles-containing blood flow under magnetic field influence. These findings showed the potentials of magnetic-field for control of suspended particles in transport medium which could be harnessed to manipulate transport of nanoparticles-containing fluids in microfluidic platforms with intricate configurations.


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