Diffuse vacuum arc with cerium oxide hot cathode

Diffuse vacuum arc with hot cathode is one of the perspective plasma sources for the development of spent nuclear fuel plasma reprocessing technology. Experimental data is known for such type of discharges on metal cathodes. In this work discharge with cerium dioxide hot cathode was studied. Cerium...

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Bibliographic Details
Published in:Journal of physics. Conference series 2016-11, Vol.774 (1), p.12190
Main Authors: Amirov, R Kh, Vorona, N A, Gavrikov, A V, Liziakin, G D, Polistchook, V P, Samoylov, I S, Smirnov, V P, Usmanov, R A, Yartsev, I M, Ivanov, A S
Format: Article
Language:English
Subjects:
Cerium oxides
Discharge
Evaporation rate
Free atmosphere
Hot cathodes
Nuclear fuel reprocessing
Physics
Plasma
Power flow
Spent nuclear fuels
Uranium
Uranium dioxide
Vacuum evaporation
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Summary:Diffuse vacuum arc with hot cathode is one of the perspective plasma sources for the development of spent nuclear fuel plasma reprocessing technology. Experimental data is known for such type of discharges on metal cathodes. In this work discharge with cerium dioxide hot cathode was studied. Cerium dioxide properties are similar to uranium dioxide. Its feature as dielectric is that it becomes conductive in oxygen-free atmosphere. Vacuum arc was studied at following parameters: cathode temperatures were between 2.0 and 2.2 kK, discharge currents was between 30 and 65 A and voltages was in range from 15 to 25 V. Power flows from plasma to cathode were estimated in achieved regimes. Analysis of generated plasma component composition was made by radiation spectrum diagnostics. These results were compared with calculations of equilibrium gaseous phase above solid sample of cerium dioxide in close to experimental conditions. Cerium dioxide vacuum evaporation rate and evaporation rate in arc were measured.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/774/1/012190