The possibility of the achievement of a high concentration, NH− 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 NH−∼1012–1013 cm−3 may be obtained in the discharge plasma if the plasma electron temperature Te≈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.
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