scholarly journals Determination of Electric Field Strength Level in a Medium using Time Series Analysis

2018 ◽  
pp. 29-35
Author(s):  
Çetin KURNAZ ◽  
Begum KORUNUR ENGİZ
Keyword(s):  
Time Series ◽  
Field Strength ◽  
Electric Field ◽  
Time Series Analysis ◽  
Electric Field Strength ◽  
Strength Level ◽  
Series Analysis

scholarly journals The basics of construction of jet-drop optical systems for measuring the electric field strength. Part 1

2021 ◽  
pp. 83-90
Author(s):  
E. V. Leun ◽  
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Liquid Metals ◽  
Differential Method ◽  
Optical Systems ◽  
Measuring Systems ◽  
Charged Droplets ◽  
Reflection Angle

The article discusses the principles and possibilities of using jet-drop optical measuring systems for monitoring the electric field strength (EFS). Two applied techniques are considered. First, the deflection of flying charged droplets (balls, hollow granules) used as micro-objects sensitive to EFS and deviating from a given rectilinear trajectory of motion, like an electron in a kinescope. Secondly, stroboscopic determination of the position and/or displacement of drops by pulsed illumination of the side of the deflected drop by the optical flow and measurement of the reflection angle for it. The possibilities of implementing the differential method of EFS measurements are discussed. The features of the use of liquids with the addition of metal nanopowders or based on liquid metals, as well as hollow droplets in the form of microspheres or hollow granules are considered

scholarly journals The electrical activity of Saharan dust as perceived from surface electric field observations

2021 ◽  
Vol 21 (2) ◽  
pp. 927-949
Author(s):  
Vasiliki Daskalopoulou ◽  
Sotirios A. Mallios ◽  
Zbigniew Ulanowski ◽  
George Hloupis ◽  
Anna Gialitaki ◽  
...  
Keyword(s):  
Time Series ◽  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Field Enhancement ◽  
Electric Circuit ◽  
Ground Level ◽  
Saharan Dust ◽  
Backscatter Coefficient ◽  
Mill Time

Abstract. We report on the electric field variations during Saharan dust advection over two atmospheric remote stations in Greece, using synergistic observations of the vertical atmospheric electric field strength (Ez) at ground level and the lidar-derived particle backscatter coefficient profiles. Both parameters were monitored for the first time with the simultaneous deployment of a ground-based field mill electrometer and a multi-wavelength polarization lidar. The field mill time series are processed to extract the diurnal variations of the global electric circuit and remove fast field perturbations due to peak lightning activity. In order to identify the influence of the elevated dust layers on the ground Ez, we extract a localized reference electric field from the time series that reflects the local fair-weather activity. Then, we compare it with the reconstructed daily average behaviour of the electric field and the Saharan dust layers' evolution, as depicted by the lidar. The observed enhancement of the vertical electric field (up to ∼100 V m−1), for detached pure dust layers, suggests the presence of in-layer electric charges. Although higher dust loads are expected to result in such an electric field enhancement, episodic cases that reduce the electric field are also observed (up to ∼60 V m−1). To quantitatively approach our results, we examine the dependency of Ez against theoretical assumptions for the distribution of separated charges within the electrified dust layer. Electrically neutral dust is approximated by atmospheric conductivity reduction, while charge separation areas within electrically active dust layers are approximated as finite-extent cylinders. This physical approximation constitutes a more realistic description of the distribution of charges, as opposed to infinite-extent geometries, and allows for analytical solutions of the electric field strength so that observed variations during the monitored dust outbreaks can be explained.

Determination of the electric field strength of filamentary DBDs by CARS-based four-wave mixing

2016 ◽  
Vol 25 (5) ◽  
pp. 054002 ◽  
Author(s):  
P Böhm ◽  
M Kettlitz ◽  
R Brandenburg ◽  
H Höft ◽  
U Czarnetzki
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Four Wave Mixing ◽  
Wave Mixing

Determination of the field strength and realization of the high-field anodization of aluminum

2017 ◽  
Vol 19 (32) ◽  
pp. 21696-21706 ◽  
Author(s):  
Ji Xing ◽  
Sitong Lu ◽  
Chi Zhang ◽  
Min Yin ◽  
Dongdong Li ◽  
...  
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
High Field ◽  
Anodic Alumina ◽  
The Self ◽  
Porous Anodic Alumina ◽  
Aluminum Anodization

The electric field strength during aluminum anodization was clarified, and this work can shed some light on the self-ordering mechanism of porous anodic alumina.

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