Electric Field Investigation Magnetic In The Plasma Current Interrupting Switch By Hydrogen Lines Stark Broadening

• Published in: IEEE Conference Record - Abstracts. 1991 IEEE International Conference on Plasma Science p. 215
• Main Authors: Chikin, R.V., Dolgachov, G.T., Golovanov, J.P., Kalinin, J.G., Pivinskaya, I.V., Ushakov, A.G., Zakatov, L.P.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 1991
• Subjects: Electromagnetic scattering; Fluctuations; Hydrogen; Magnetic switching; Optical scattering; Plasma measurements; Polarization; Switches; Tokamaks; Toroidal magnetic fields
• ISBN: 9780780301474; 0780301471
• DOI: 10.1109/PLASMA.1991.695794

First results of electric field measurements in the Plasma Current Interrupting Switch (PCIS) gap using Ha line luminescence are adduced. Preliminary investigations of Ha light emission in the gap show that light intensity sharply increases when drive current exceeds certain value and plasma erosion begins. Optical scheme allows lo obtain different types of spectral line Ha contours with spatial and time resolution. As a result of investigation of Stark Ha line broadening during different stages of drive current increase electric fields in the PCIS gap were registered: low-frequency (quasi-static) with E=10-20 kV/cm, high-frequency and quasi-constant electric fields with E=20-35 kV/cm; and E has sufficient longitudinal component. It is worth to outline that quasi-constant fields are localized in a thin layer (in comparison with the gap) of PCIS plasma. We guess that applied method has perspectives for detailed PCIS operation mechanism investigation.