Modeling of the thermal regime of a mobile electric vehicle charge unit

Rechargeable batteries are an important element in mobile electric vehicle charging systems. Batteries have an operating temperature range, and outside of this range the performance will be reduced or the equipment will cease to function. It is problematic to check this situation experimentally due to the number of batteries used (1200 pieces), so it is necessary to simulate the thermal operating conditions beforehand. The simulation has been performed in Comsol and a preliminary confirmation of the operability of the batteries in the mobile electric vehicle charging unit has been obtained

Electromagnetic shield characteristics investigation for the calibration the NMR logging tool

The problem of electromagnetic shielding is relevant due to increasing number of electronic devices that interact with each other. It is known that shield, which is made of high conductivity materials, is widely used for controlling electromagnetic noise. Due to development of NMR logging tool two shielding Faraday cages have been made. The aim of the work was determination the frequency transmittance dependence of shielding in range from 100 kHz to 100 MHz. Transmitting and receiving devices were developed for an experiment. As a result, constructed shields are suitable for tuning and calibration NMR logging tools

Annealing of PrF3 nanoparticles by microwave irradiation

The influence of microwave irradiation on the recovery of nanocrystalline PrF3 powders has been experimentally analyzed by nuclear magnetic resonance (NMR) at T = 1.5 K. It is established that the relaxation times of 141Pr and 19F nuclei rise significantly with an increase in the hydrothermal-treatment time, whereas the 141Pr NMR spectra narrow, which indicates a decrease in the number of defects in the lattices of nanosamples. © 2014 Pleiades Publishing, Ltd

The home-built pulse nuclear magnetic resonance spectrometer with digital quadrature detection for 3He research at low temperatures

The home-built pulse nuclear magnetic resonance spectrometer for 3He research is described. The temperature range is 1.5 - 4.2 K, the frequency range is 3 - 20 MHz, the dead time is 10 μs at 10 MHz. The spectrometer software is based on programming language LabVIEW. The advantages of digital technique are described; particularly the implementation of digital quadrature detector. © Kazan Federal University (KFU)

Discovery of the classical Bose-Einstein condensation of magnons in solid antiferromagnets

Results of experiments in which the Bose-Einstein condensate of magnons is created in the CsMnF 3 easy-plane antiferromagnet in a system with coupled nuclear-electron precession with dynamical frequency shift are presented. This condensate is similar to the Bose-Einstein condensate of magnons in superfluid 3He-A in aerogel. © 2011 Pleiades Publishing, Ltd

Atomic type magnon Bose-Einstein condensation in antiferromagnet

The Spin Supercurrent and Bose-Einstein condensation of magnons, similar to an atomic BEC, was observed in 1984 in superfluid 3He-B The same phenomena should exist in solid magnetic systems. We describe here the first observation of magnon BEC in solid easy plain antiferromagnet CsMnF3. We have observed magnon BEC on a mode of coupled Nuclear-Electron precession. The dynamical properties of this mode have many similarities with NMR of superfluid 3He-A The frequency changes with deflection of nuclear magnetization. Furthermore, the involvement of electron ordered subsystem gives the magnon-magnon interaction, spin waves and spin supercurrent, while the nuclear subsystem gives the relatively long time of relaxation