Open AccessDEPENDENCES OF HELIUM RETENTION IN TUNGSTEN AND TANTALUM COATINGS IRRADIATED WITH He+ IONS ON FLUENCE AND TEMPERATURE
Author(s) -
В. В. Бобков,
L. P. Tishchenko,
Yu. I. Kovtunenko,
A.O. Skrypnyk,
L. A. Gamayunova
Publication year - 2020
Publication title -
problems of atomic science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.216
H-Index - 17
eISSN - 1562-6016
pISSN - 1682-9344
DOI - 10.46813/2020-130-093
Subject(s) - tantalum , tungsten , materials science , fluence , irradiation , helium , desorption , ion , thermal desorption , thermal desorption spectroscopy , analytical chemistry (journal) , titanium , atomic physics , metallurgy , chemistry , adsorption , nuclear physics , physics , organic chemistry , chromatography
The processes of helium accumulation and thermal desorption for tungsten and tantalum coatings deposited on a stainless-steel substrate with an intermediate titanium layer were studied at various temperatures of the samples when irradiated with He+ ions to various fluences. The dependences of the concentration of captured helium and the form of the spectra of its thermal desorption into vacuum were found both on the fluence of He+ ions and on the temperature of the samples upon irradiation. Possible mechanisms for the accumulation and thermal desorption of helium, as well as the formation of defects in the crystal lattice of the samples, are discussed.