Abstract
The profiles of the Balmer H α, H β, H γ and H δ lines have been measured for different electron densities N ( N=3×10 15…1×10 16 cm -3) and for a magnetic field strength of H = 69 kgauss in the plasma region observed. The magnetic field has been created by a magnet coil surrounding a straight discharge tube. The energy necessary for the creation and maintenance of this field was stored in two condenser banks. The measurements showed a strong modification of the profiles of both the H α and the H β lines by the magnetic field when compared with profiles emitted from magnetically free plasmas. On the other hand, there is only a small influence of the magnetic field on H γ and H δ. Concerning the H α line, good agreement was found between the measured profiles and those calculated by Nguyen-Hoe, Drawin and Herman. The conditions under which the wing intensities of ordinary Stark profiles may be used for a determination of electron densities, in spite of the presence of a strong magnetic field, have been checked. A new method for measuring electron densities from line profiles in strongly magnetized plasmas is proposed.
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