Experimental diagnosis of electron density and temperature in capacitively coupled argon plasmas: Triple-frequency discharges and two-dimensional spatial distributions

2021 ◽  
Vol 28 (9) ◽  
pp. 093501
Author(s):  
Jidun Wu ◽  
Hao Zheng ◽  
Yanfei Wang ◽  
Qilu Cao ◽  
Fengzhu Zhou ◽  
...  
Keyword(s):  
Electron Density ◽  
Spatial Distributions ◽  
Two Dimensional ◽  
Capacitively Coupled ◽  
Argon Plasmas ◽  
Triple Frequency ◽  
Electron Density And Temperature

Electron density and ion energy dependence on driving frequency in capacitively coupled argon plasmas

2007 ◽  
Vol 40 (22) ◽  
pp. 7019-7023 ◽  
Author(s):  
Xi-Ming Zhu ◽  
Wen-Cong Chen ◽  
Shu Zhang ◽  
Zhi-Gang Guo ◽  
Da-Wei Hu ◽  
...  
Keyword(s):  
Electron Density ◽  
Energy Dependence ◽  
Driving Frequency ◽  
Ion Energy ◽  
Capacitively Coupled ◽  
Argon Plasmas

On the Interpretation of Weak Sources of Enhanced 80 MHz Emission in the Solar Corona

1970 ◽  
Vol 1 (8) ◽  
pp. 375-376 ◽  
Author(s):  
A. C. Riddle
Keyword(s):  
Thermal Radiation ◽  
Solar Corona ◽  
Electron Density ◽  
Thermal Model ◽  
The Sun ◽  
Two Dimensional ◽  
Low Intensity ◽  
Coronal Streamer ◽  
Synodic Period ◽  
Electron Density And Temperature

Recent two-dimensional observations of the quiet sun at 80 MHz by Sheridan showed a persistent low-intensity source (radio enhancement) whose daily motion was consistent with a source at radius 0.95 R® rotating with a synodic period of 27.3 d. In this paper we shall attempt to interpret this result in terms of the effects of refraction and opacity in model coronas. Comprehensive studies of the Sun at 169 MHz show that similar radio enhancements are associated with coronal streamers and that reasonable values for electron density and temperature within the coronal streamer allow the observations to be explained in terms of thermal radiation. Hence we shall consider only coronal models that possess streamer structure. We shall show that temperature enhancements within the streamer (‘thermal model’) do not lead to an apparent radius as small as that observed by Sheridan and that his observation may be better understood in terms of a non-thermal model for radiation from the streamer region.

Sign in / Sign up

Export Citation Format

Share Document