scholarly journals Electron density and electron neutral collision frequency in the ionosphere using plasma impedance probe measurements

2008 ◽  
Vol 113 (A9) ◽  
pp. n/a-n/a ◽  
Author(s):  
E. Spencer ◽  
S. Patra ◽  
T. Andriyas ◽  
C. Swenson ◽  
J. Ward ◽  
...  
Keyword(s):  
Electron Density ◽  
Collision Frequency ◽  
Plasma Impedance ◽  
Impedance Probe ◽  
Probe Measurements

Measurement of absolute electron density with a plasma impedance probe

2005 ◽  
Vol 76 (2) ◽  
pp. 023503 ◽  
Author(s):  
David D. Blackwell ◽  
David N. Walker ◽  
William E. Amatucci
Keyword(s):  
Electron Density ◽  
Plasma Impedance ◽  
Impedance Probe

Time-resolved curling-probe measurements of electron density in high frequency pulsed DC discharges

2015 ◽  
Vol 55 (1) ◽  
pp. 016101 ◽  
Author(s):  
Anil Pandey ◽  
Wataru Sakakibara ◽  
Hiroyuki Matsuoka ◽  
Keiji Nakamura ◽  
Hideo Sugai
Keyword(s):  
Electron Density ◽  
High Frequency ◽  
Time Resolved ◽  
Pulsed Dc ◽  
Probe Measurements

Characteristics of the plasma impedance probe with constant bias

2005 ◽  
Vol 12 (9) ◽  
pp. 093510 ◽  
Author(s):  
David D. Blackwell ◽  
David N. Walker ◽  
Sarah J. Messer ◽  
William E. Amatucci
Keyword(s):  
Constant Bias ◽  
Plasma Impedance ◽  
Impedance Probe

Polymorphous Silicon Films Produced in Large Area Reactors by PECVD at 27.12 MHz and 13.56 MHz

2003 ◽  
Vol 762 ◽  
Author(s):  
H. Águas ◽  
L. Raniero ◽  
L. Pereira ◽  
E. Fortunato ◽  
P. Roca i Cabarrocas ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Spectroscopic Ellipsometry ◽  
Conductivity Measurements ◽  
Large Area ◽  
Structural Characterisation ◽  
Hydrogen Dilution ◽  
Infrared And Raman Spectroscopy ◽  
Impedance Probe ◽  
Si Films ◽  
Probe Measurements

AbstractThis work refers to a study performed on polymorphous silicon (pm-Si:H) at excitation frequencies of 13.56 and 27.12 MHz in a large area PECVD reactor. The plasma was characterised by impedance probe measurements, aiming to identify the plasma conditions that lead to produce pm-Si:H films. The films produced were characterised by spectroscopic ellipsometry, infrared and Raman spectroscopy and hydrogen exodiffusion experiments, which are techniques that permit the structural characterisation of the pm-Si films and to study the possible differences between the films deposited at 13.56 and 27.12 MHz. Conductivity measurements were also performed to determine the transport properties of the films produced. The set of data obtained show that the 27.12 MHz pm-Si:H can be grown at higher rates with less hydrogen dilution and power density, being the resulting films denser, chemically more stable and with improved performances than the pm-Si:H films grown at 13.56 MHz.

scholarly journals Study of the Propagation Characteristics of Terahertz Waves in a Collisional and Inhomogeneous Dusty Plasma with a Ceramic Substrate and Oblique Angle of Incidence

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Qingwen Rao ◽  
Guanjun Xu ◽  
Pengfei Wang ◽  
Zhengqi Zheng
Keyword(s):  
Electron Density ◽  
Dusty Plasma ◽  
Collision Frequency ◽  
Incident Angle ◽  
Ceramic Substrate ◽  
Dust Particles ◽  
Angle Of Incidence ◽  
Oblique Angle ◽  
Terahertz Waves ◽  
Thz Wave

In this paper, the propagation properties of a terahertz (THz) wave in a collisional and inhomogeneous dusty plasma with a ceramic substrate and oblique angle of incidence are studied using the scattering matrix method. The influence of the various corresponding parameters, such as the frequency of the THz wave, angle of incidence, electron density, radius and density of the dust particles, and the collision frequency, on the absorbance and transmittance is calculated. The results of the simulation indicate that an increase in the wave frequency increases the transmittance and decreases the absorbance. Moreover, the absorbance of a THz wave in a dusty plasma with a ceramic substrate increases with an increase in the incident angle, maximum electron density, coefficient of steepness, density and radius of the dust particles, and collision frequency. These results provide an important theoretical basis for the problem of communication blackout between ground and spacecraft.

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