Emissive cathode immersed in a plasma: plasma–cathode interactions, operation and stability
F Pagaud,
V Dolique,
N Claire
et al.
Abstract:Thermionic emission from a polycrystalline tungsten emissive cathode immersed in a magnetized plasma column is investigated experimentally and numerically. Electrical and optical measurements of the cathode temperature show a highly inhomogeneous cathode temperature profile due to plasma–cathode interactions. The spatially and temporally resolved cathode temperature profile provides an in-depth understanding of the thermionic electron current, in excellent agreement with experimental data. The plasma-cathode c… Show more
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