Direct Measurements of Dipolar Radial Electric Fields in a Resonating Plasma Column

1971 ◽  
Vol 14 (9) ◽  
pp. 1984 ◽  
Author(s):  
Kanwal J. Parbhakar
Keyword(s):  
Electric Fields ◽  
Plasma Column ◽  
Direct Measurements

Direct measurements of dislocation charges in Ca2+‐doped KC1 by using large electric fields

1984 ◽  
Vol 49 (3) ◽  
pp. 395-407 ◽  
Author(s):  
Toshihiko Kataoka ◽  
Luigi Colombo ◽  
J. C. M. Li
Keyword(s):  
Electric Fields ◽  
Direct Measurements

Radial distribution of the plasma potential in a cylindrical plasma column with a longitudinal magnetic field

2021 ◽  
Vol 87 (4) ◽  
Author(s):  
G. Liziakin ◽  
A. Oiler ◽  
A. Gavrikov ◽  
N. Antonov ◽  
V. Smirnov
Keyword(s):  
Magnetic Field ◽  
Electric Fields ◽  
Radial Distribution ◽  
Plasma Column ◽  
Radial Profile ◽  
Plasma Potential ◽  
Symmetric System ◽  
Axially Symmetric ◽  
Cylindrical Plasma ◽  
Cylindrical Plasma Column

The possibility of controlling the electrostatic field distribution in plasma has yielded wide prospects for modern technologies. As a magnetic field primarily allows for creating electric fields in plasma, it serves as an additional obstacle for the current flow through a medium. In the present paper, an axially symmetric system is considered in which the magnetic field is directed along the axis and concentric electrodes are located at the ends. The electrodes are negatively biased. A model which solves the problem of the radial distribution of the plasma potential inside the cylindrical plasma column supported by the end electrodes is proposed. The most commonly encountered configurations of the electrical connection for the end electrodes are considered, and the particular solutions to the problem of the radial distribution are presented. The contribution of ions and electrons to the transverse conductivity is evaluated in detail. The influence of a thermionic element on the radial profile of the plasma potential is considered. To verify the proposed model, an experimental study of the reflex discharge is carried out with both cold electrodes and a thermionic element on the axis. A comparison of the computational model results with experimental data is given. The presented model makes it possible to solve the problem concerning the plasma potential distribution in the case of an arbitrary number of end electrodes, and also to take into account the inhomogeneity of the distribution of plasma density, neutral gas pressure and electron temperature along the radius.

scholarly journals Direct Measurements of Electric Fields in Weak Hydrogen Bonds

2012 ◽  
Vol 102 (3) ◽  
pp. 269a ◽  
Author(s):  
Miguel Saggu ◽  
Nicholas M. Levinson ◽  
Steven G. Boxer
Keyword(s):  
Hydrogen Bonds ◽  
Electric Fields ◽  
Direct Measurements ◽  
Weak Hydrogen Bonds

The effect of radial electric fields on low frequency oscillations in a plasma column

1968 ◽  
Vol 10 (6) ◽  
pp. 641-644 ◽  
Author(s):  
L Enriques ◽  
A M Levine ◽  
G B Righetti
Keyword(s):  
Electric Fields ◽  
Plasma Column ◽  
Low Frequency ◽  
Low Frequency Oscillations

scholarly journals A mechanism for ageing in a deeply supercooled molecular glass

2021 ◽  
Author(s):  
Andrew Cassidy ◽  
Mads Ry Vogel Jørgensen ◽  
Artur Glavic ◽  
Valeria Lauter ◽  
Oksana Plekan ◽  
...  
Keyword(s):  
Electric Fields ◽  
Energy Barrier ◽  
Methyl Formate ◽  
Secondary Relaxation ◽  
Molecular Glass ◽  
Direct Measurements ◽  
Deposited Films

Measurements of the decay of electric fields, formed spontaneously within vapour-deposited films of cis-methyl formate, provide the first direct measurements of the energy barrier to secondary relaxation mechanisms in a...

rf electric fields in an inhomogeneous magnetized plasma column

1978 ◽  
Vol 49 (8) ◽  
pp. 4366-4368
Author(s):  
C. R. Skipping ◽  
M. E. Oakes
Keyword(s):  
Electric Fields ◽  
Plasma Column ◽  
Magnetized Plasma

scholarly journals Noninvasive Measurement of Conductivity Anisotropy at Larmor Frequency Using MRI

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Joonsung Lee ◽  
Yizhuang Song ◽  
Narae Choi ◽  
Sungmin Cho ◽  
Jin Keun Seo ◽  
...  
Keyword(s):  
Electric Field ◽  
Electric Fields ◽  
Current Density ◽  
Partial Information ◽  
Larmor Frequency ◽  
Biological Tissues ◽  
Conductivity Tensor ◽  
Conductivity Anisotropy ◽  
Circulating Current ◽  
Direct Measurements

Anisotropic electrical properties can be found in biological tissues such as muscles and nerves. Conductivity tensor is a simplified model to express the effective electrical anisotropic information and depends on the imaging resolution. The determination of the conductivity tensor should be based on Ohm's law. In other words, the measurement of partial information of current density and the electric fields should be made. Since the direct measurements of the electric field and the current density are difficult, we use MRI to measure their partial information such as B1 map; it measures circulating current density and circulating electric field. In this work, the ratio of the two circulating fields, termed circulating admittivity, is proposed as measures of the conductivity anisotropy at Larmor frequency. Given eigenvectors of the conductivity tensor, quantitative measurement of the eigenvalues can be achieved from circulating admittivity for special tissue models. Without eigenvectors, qualitative information of anisotropy still can be acquired from circulating admittivity. The limitation of the circulating admittivity is that at least two components of the magnetic fields should be measured to capture anisotropic information.

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