Open AccessThe possibilities of using a femtosecond fiber laser in the manufacture of thermionic cathodes
Publication year - 2021
Publication title -
prikladnaâ fizika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.205
H-Index - 7
ISSN - 1996-0948
DOI - 10.51368/1996-0948-2021-2-67-72
Subject(s) - femtosecond , cathode , materials science , thermionic emission , tungsten , foil method , hot cathode , laser , plasma , rhenium , optoelectronics , sputtering , core (optical fiber) , fiber , optics , nanotechnology , composite material , chemistry , electron , thin film , physics , quantum mechanics , metallurgy
The possibilities of using a fiber laser with a femtosecond duration of radiation pulses in the manufacture of miniature thermionic cathodes made of 50 μm of tungsten-rhenium foil are shown. The cathode assembly, consisting of a heater and a core, is made in the form of a solid structure with an oxidecoating applied by ion-plasma sputtering. The emission characteristics of the cathode are presented.