Determination of the coefficient of reflection of metastable argon atoms from the discharge tube wall

作者：Grigorian G M^*; Dyatko N A; Kochetov I V

来源：Plasma Physics Reports, 2015, 41(5): 434-440.

DOI：10.1134/S1063780X15050049

Radial profiles of the density of metastable atoms Ar(P-3(2)) in the positive column of a dc glow discharge in argon were measured. Gas-discharge glass tubes with clean inner surfaces and surfaces covered with a carbonitride or carbon film were utilized. The parameters of the discharge plasma under experimental conditions were calculated in the framework of a one-dimensional (along the tube radius) discharge model. The coefficient K of reflection of Ar(P-3(2)) atoms from the tube wall was estimated by comparing the measured and calculated density profiles. It is found that, for a clean tube wall, the coefficient of reflection is K = 0.4 +/- 0.2, whereas for a wall covered with a carbonitride or carbon film, it is K < 0.2.

• 出版日期2015-5