Spectroscopic measurements of electric field in abnormal glow discharge in helium

Abstract

In this paper we propose a method for electric field measurements based on intensity ratio of forbidden and allowed helium lines. He I 402.6 nm, He I 447.1 nm, and He I 492.1 lines and their forbidden components are used for the measurement of electric field strength in the cathode region of the abnormal glow discharge in helium-hydrogen mixture. Electric filed strength was independently determined using polarization spectroscopy of Hβ line and then compared with electric filed strength obtained from relative intensity of He I forbidden and allowed lines.