Hollow cathode electron oscillation?

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Behnam Farid

You can read about hollow cathode effect in [1]. A recent publication on the subject is [2].

[1] A Piel, Plasma Physics, 2nd edition (Springer, Berlin, 2017).

[2] MP Georgin et al., 2018 Joint Propulsion Conference, Cincinnati, Ohio

Conference Paper Plasma Instabilities in the Plume of a Hollow Cathode

Maged Gumaan Bin-Saad

see

Role of additional gas ionization by oscillating electrons within the cathode fall region of a glow discharge with a hollow cathode

A. S. Metel', A. I. Nastyukha

https://booksc.xyz/book/12183377/3ed58e