Volume-plasma generation of a high H concentration in low-voltage cesium hydrogen discharge

The possibility of the achievement of a high concentration, N H − of negative hydrogen ions in low-voltage cesium–hydrogen discharge plasma is investigated. The H − concentration is determined from the experimentally measured absorption of laser radiation in the discharge plasma. It is shown that the H − concentration N H − ∼10 12 –10 13 cm −3 may be obtained in the discharge plasma if the plasma electron temperature T e ≈0.5–1 eV. A comparison between the discharge theory and the experiments was fulfilled. It is shown that experimental results coincide well with theoretical calculations.