Title :
Two-Dimensional LCIF Images of Electron Density and Temperature Within an ECR Plasma Cathode
Author :
Weatherford, Brandon R. ; Barnat, Edward V. ; Foster, John E.
Author_Institution :
Dept. of Nucl. Eng. & Radiol. Sci., Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
Two-dimensional mappings of electron density and temperature within an electron cyclotron resonance (ECR) plasma cathode are presented. As electron current is extracted, a secondary plasma is formed on the upstream side of the extraction aperture, and the spatial distribution of the ECR plasma is affected. The aperture plasma is surrounded by a region of “hot” electrons, suggesting the possibility of a double layer near the aperture.
Keywords :
cathodes; electron sources; fluorescence spectroscopy; plasma applications; plasma density; plasma diagnostics; plasma radiofrequency heating; plasma sheaths; plasma temperature; plasma transport processes; 2D LCIF images; ECR plasma cathode; ECR plasma spatial distribution; electron current; electron cyclotron resonance plasma cathode; electron density; electron temperature; hot electrons; laser collisional induced fluorescence; plasma double layer; secondary plasma; Acceleration; Apertures; Cathodes; Laser beams; Plasma temperature; Electron sources; plasma diagnostics;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2011.2158120
