The Influence of Longitudinal Magnetic Field on Recombination Radiation of Low-Pressure Glow Discharge in Hydrogen and Helium

We study the influence of longitudinal magnetic field on the radiation of low-pressure glow discharges in hydrogen and helium. We conducted experiments under a pressure in a discharge chamber of $10$–$20$ Pa and a discharge current of 10–20 mA. A $0$–$1600$ G magnetic field influenced only the cathode parts of the discharge, negative glow, and the dark Faraday space. The electron temperature and density were measured by the two-probe method as a function of magnetic field. We studied the dependence of the intensity of radiation in the spectral lines and continuous spectrum on magnetic field induction. We discovered that, under the action of magnetic field, discharge in hydrogen and helium is compressed and its glow volume increases by a factor of $20$–$25$. In contrast, the radiation intensity in the lines and continuous spectrum increase by a factor of $100$–$200$. We found a strong discrepancy in the measured intensity of the continuous spectrum into spectral ranges with calculation of electron–ion recombination.