ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Using vacuum ultraviolet laser-absorption spectroscopy, the H° density and temperature are measured as a function of discharge current and H2-gas flow in both the plasma column and the drift region between the plasma column and the emitter in the 4X source. For typical source operating parameters, the atom temperature is 1.5 eV in the plasma column and 0.6 eV in the drift region; the atom density 7×1014 cm−3 in the plasma column and 4×1014 cm−3 in the drift region. Separate measurements give 2% for the ratio of H2 molecules in the first vibrational level to the total H2 density.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1141260