Laser and microwave interferometric study of recombination in a highly ionised helium plasma

1 April 1966

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 2 (4) , 157-158
https://doi.org/10.1049/el:19660129

Abstract

A 3.3 μm helium–neon laser and 2.25 and 8.6 mm microwave interferometer systems have been used to measure electron densities over the range 1.8 × 10¹⁵ to 8 × 10¹¹ electrons/cm³ in a decaying helium plasma without a confining magnetic field at gas pressures ranging from 82 mtorr to 1.2 torr. Collisional radiative recombination is considered to be the dominant mechanism of electron removal above a pressure of 700 mtorr.

Keywords

RECOMBINATION
MICROWAVE
LASER
ELECTRONS/CM3
CONFINING
REMOVAL
COLLISIONAL
RADIATIVE

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