1.
Rev Sci Instrum
; 81(5): 053506, 2010 May.
Article
in English
| MEDLINE
| ID: mdl-20515138
ABSTRACT
An electron temperature gradient (ETG) is formed perpendicular to the magnetic field lines by superimposing low-temperature thermionic electrons emitted from a tungsten hot plate upon high-temperature electrons of an electron cyclotron resonance plasma, which pass through two different-shaped mesh grids. The radial profile of the plasma space potential can be controlled independent of the ETG by changing the bias voltages of the hot plate.