Abstract
This paper deals with a method for space charge compensation in noble gases and with the performance of a special thermionic converter with operating temperatures not exceeding 1300°K. Low work function collector materials ( φ c ≈- 1 V) are feasible in high vacuum or in noble gases only. Positive ions of noble gases for electron space charge compensation are produced in an auxiliary discharge. The influence of the low pressure plasma on the efficiency of conversion is investigated experimentally in different noble gases. Values of experimental devices are given: Mean efficiency of conversion 8 per cent, highest efficiency obtained 20 per cent. Output power density of emitter surface 1 W/cm 2.
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