Resonant Absorption of Low Frequency Electrostatic Wave Energy in a Plasma Contained in an Axially Nonuniform Magnetic Field

1970 ◽  
Vol 29 (3) ◽  
pp. 769-775 ◽  
Author(s):  
Shoji Miyake ◽  
Teruyuki Sato ◽  
Kazuo Takayama
Keyword(s):  
Magnetic Field ◽  
Wave Energy ◽  
Low Frequency ◽  
Resonant Absorption ◽  
Nonuniform Magnetic Field ◽  
Electrostatic Wave

Electrostatic modes in a magnetized plasma with a longitudinal density gradient

1983 ◽  
Vol 29 (2) ◽  
pp. 177-194 ◽  
Author(s):  
J. E. Maggs ◽  
G. J. Morales
Keyword(s):  
Magnetic Field ◽  
Density Gradient ◽  
Low Frequency ◽  
Resonant Absorption ◽  
Plasma Resonance ◽  
Magnetized Plasma ◽  
Auroral Ionosphere ◽  
Long Wavelength ◽  
Plasma Theory ◽  
The Magnetic Field

An analytic study is made of the electrostatic mode structures which exist between the upper-hybrid cut-off and the plasma resonance in a plasma in which the zero-order density gradient points along the magnetic field. In general the solutions consist of long-wavelength cold modes which are converted to short-wavelength Bohm-Gross modes near plasma resonance. However, there exist certain discrete angles of propagation at which finite solutions exist that can be described solely in terms of cold plasma theory. The relevance of these processes to resonant absorption experiments in the auroral ionosphere is considered. A brief study is made of the changes produced by a finite angle between the density gradient and the magnetic field. The possibility of finding analogous low-frequency structures is also investigated.

scholarly journals Resonant ULF absorption in storm time conditions

2017 ◽  
Vol 3 (1) ◽  
pp. 103-113
Author(s):  
Владимир Бадин ◽  
Vladimir Badin
Keyword(s):  
Magnetic Field ◽  
Variational Analysis ◽  
Spectral Power ◽  
Low Frequency ◽  
Resonant Absorption ◽  
Ulf Waves ◽  
Doppler Signals ◽  
Doppler Data ◽  
High Latitude Ionosphere ◽  
Field Lines

The work deals with ULF radar observations of the high-latitude ionosphere. Doppler data from the Norwegian STARE instrument are analyzed for the moderate magnetic storm observed on December 31, 1999–January 01, 2000. Upon averaging the Doppler signals along radar beams, the spectral power of signals is determined for each beam as a function of frequency ranging from 1 to 10 mHz. Sharp drops (about 10 dB) of spectral powers with frequency are found for all radar beams. A variational analysis of spectral powers is carried out by least squares, with power drops being modeled by stepwise profiles constructed of mean spectral powers preceding and succeeding the drops. Using this variational analysis, the frequency of the power drop is determined for each radar beam. Being averaged over all beams, this frequency is 4.8 ± 0.5 mHz. The results obtained are interpreted as resonant absorption of ultra-low-frequency (ULF) waves occurring on eigenfrequencies of magnetic field lines over wave propagation from the magnetopause deep into the magnetosphere.

scholarly journals Resonant ULF absorption at storm time conditions

2017 ◽  
Vol 3 (1) ◽  
pp. 79-87 ◽  
Author(s):  
Владимир Бадин ◽  
Vladimir Badin
Keyword(s):  
Magnetic Field ◽  
Variational Analysis ◽  
Spectral Power ◽  
Low Frequency ◽  
Resonant Absorption ◽  
Ulf Waves ◽  
Doppler Signals ◽  
Doppler Data ◽  
High Latitude Ionosphere ◽  
Field Lines

The work deals with ULF radar observations of the high-latitude ionosphere. Doppler data from the Norwegian STARE instrument are analyzed for the moderate magnetic storm observed on December 31, 1999–January 01, 2000. Upon averaging the Doppler signals along radar beams, the spectral power of signals is determined for each beam as a function of frequency ranging from 1 to 10 mHz. Sharp drops (about 10 dB) of spectral powers with frequency are found for all radar beams. A variational analysis of spectral powers is carried out by least squares, with power drops being modeled by stepwise profiles constructed of mean spectral powers preceding and succeeding the drops. Using this variational analysis, the frequency of the power drop is determined for each radar beam. Being averaged over all beams, this frequency is 4.8±0.5 mHz. The results obtained are interpreted as resonant absorption of ultra-low-frequency (ULF) waves occurring on eigenfrequencies of magnetic field lines over wave propagation from the magnetopause deep into the magnetosphere.

PEMANFAATAN RADIASI ENERGI TEGANGAN 150 KV UNTUK LAMPU LED PENERANGAN JALAN

Jurnal Teknik ◽  
2018 ◽  
Vol 7 (1) ◽  
Author(s):  
Mauludi Manfaluthy
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
High Voltage ◽  
Low Frequency ◽  
Energy Utilization ◽  
World Health ◽  
Electromagnetic Signals ◽  
Health Organization ◽  
The Magnetic Field ◽  
Low Frequency Waves

WHO (World Health Organization) concludes that not much effect is caused by electric field up to 20 kV / m in humans. WHO standard also mentions that humans will not be affected by the magnetic field under  100 micro tesla and that the electric field will affect the human body with a maximum standard of 5,000 volts per meter. In this study did not discuss about the effect of high voltage radiation SUTT (High Voltage Air Channel) with human health. The research will focus on energy utilization of SUTT radiation. The combination of electric field and magnetic field on SUTT (70-150KV) can generate electromagnetic (EM) and radiation waves, which are expected to be converted to turn on street lights around the location of high voltage areas or into other forms. The design of this prototype works like an antenna in general that captures electromagnetic signals and converts them into AC waves. With a capacitor that can store the potential energy of AC and Schottky diode waves created specifically for low frequency waves, make the current into one direction (DC). From the research results obtained the current generated from the radiation is very small even though the voltage is big enough.Keywords : Radiance Energy, Joule Thief, and  LED Module.

Sign in / Sign up

Export Citation Format

Share Document