Atomic Hydrogen and Deuterium Zeeman Spectra of Balmer-α and-β Lines Observed from a Plücker Tube Discharge

Abstract

Atomic data on the Zeeman effect, especially for hydrogen and deuterium atoms, are vital for the analysis of spectral line profiles from magnetically confined fusion plasmas. In our laboratory, a 1.33 m McPherson spectrometer has been equipped with a CCD detector system, for precise Zeeman splitting and line intensity measurements. In the wavelength range 5000-8000 Å, the resolution achieved in first and second order is about 0.07 Å and 0.04 Å, respectively. Construction of the CCD detector system is described, and sample spectra are displayed and discussed, with experimental errors within 0.5-1 % in known cases. Zeeman spectra of Balmer Hα,β and Dα,β lines were generated in a Plücker tube discharge containing a mixture of Kr and H2/D2 (6:1). Disturbance of the polarization of the π-components and an increase in the apparent atomic temperature derived from the widths of the Hα,β and Dα,β Zeeman components are described and discussed.