Determination of the work function distribution of a LaB6 hollow cathode based on plasma potential measurement and 2D plasma numerical simulation.

2018 ◽  
Author(s):  
Pablo Guerrero ◽  
James E. Polk ◽  
Robert B. Lobbia ◽  
Ioannis G. Mikellides
Keyword(s):  
Numerical Simulation ◽  
Work Function ◽  
Hollow Cathode ◽  
Plasma Potential ◽  
Potential Measurement ◽  
Function Distribution

scholarly journals Determination of Electron Excitation Temperature in an RF-DC Hollow Cathode Nitrogen Plasma

2021 ◽  
Vol 1825 (1) ◽  
pp. 012050
Author(s):  
J M Windajanti ◽  
D J D H Santjojo ◽  
M A Pamungkas ◽  
Abdurrouf
Keyword(s):  
Hollow Cathode ◽  
Electron Excitation ◽  
Nitrogen Plasma ◽  
Excitation Temperature

scholarly journals Optimal design of the solar tracking system of parabolic trough concentrating collectors

2020 ◽  
Vol 15 (4) ◽  
pp. 613-619
Author(s):  
Li Kong ◽  
Yunpeng Zhang ◽  
Zhijian Lin ◽  
Zhongzhu Qiu ◽  
Chunying Li ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Solar Radiation ◽  
Tracking System ◽  
Low Cost ◽  
Parabolic Trough ◽  
The North ◽  
Tracking Mode ◽  
Solar Tracking ◽  
East West

Abstract The present work aimed to select the optimum solar tracking mode for parabolic trough concentrating collectors using numerical simulation. The current work involved: (1) the calculation of daily solar radiation on the Earth’s surface, (2) the comparison of annual direct solar radiation received under different tracking modes and (3) the determination of optimum tilt angle for the north-south tilt tracking mode. It was found that the order of solar radiation received in Shanghai under the available tracking modes was: dual-axis tracking > north-south Earth’s axis tracking > north-south tilt tracking (β = 15°) > north-south tilt tracking (β = 45) > north-south horizontal tracking > east-west horizontal tracking. Single-axis solar tracking modes feature simple structures and low cost. This study also found that the solar radiation received under the north-south tilt tracking mode was higher than that of the north-south Earth’s axis tracking mode in 7 out of 12 months. Therefore, the north-south tilt tracking mode was studied separately to determine the corresponding optimum tilt angles in Haikou, Lhasa, Shanghai, Beijing and Hohhot, respectively, which were shown as follows: 18.81°, 27.29°, 28.67°, 36.21° and 37.97°.

Use of the work function distribution for cathode characterization

1987 ◽  
Author(s):  
A.M. Shroff ◽  
J.C. Tonnerre ◽  
P. Lucas ◽  
P. Palluel ◽  
D. Brion
Keyword(s):  
Work Function ◽  
Function Distribution
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