Implantation of helium and deuterium ions into tungsten-coated composite structures

Implantation of Deuterium and Helium Ions into a Tungsten-Coated Composite Structures

“…This work continues our researches [27][28][29][30] dealing with the formation and annealing of radiationinduced defects, the interaction of the intrinsic and induced matrix defects with the implanted ion-beam particles, and the changes in the microstructure of the surface layer and the surface morphology of the specimens irradiated with medium-energy hydrogen and helium isotopes. In particular, the processes that accompany the implantation of D + and He + ions into tungsten coatings in multilayer functional structures that are proposed to be applied in devices of thermonuclear facilities are studied.…”

“…In the course of bombarding the tungsten coatings with D + or He + ions, there arise radiation defects of various types in them: defects in the material crystal lattice and impurities in the form of implanted ion beam particles. In order to determine the origin of the generated radiation defects, we, as was done earlier in works [27,28,33,38,39], analyzed the capture, migration, and release of implanted deuterium and helium particles from the specimens into vacuum with the help of thermal desorption spectra. In particular, this method was used, when determining the activation energy of the thermal desorption in the main peaks of particle release spectra.…”

Deuterium-ion implantation into composite structures with tungsten coatings

“…Studies of deute rium accumulation accompanied by the formation of solid solutions and their disintegration in the crystal lattice of tungsten coatings were not carried out. This work continues investigations of the processes accom panying the implantation of deuterium ions into composite structures with tungsten coatings (the pro cesses of accumulation, retention and thermodes orption) [14][15][16][17]. The influence of the thickness of the coating, the system composition and the radiation dose of D + ions on the aforementioned processes was established.…”

DEPENDENCES OF HELIUM RETENTION IN TUNGSTEN AND TANTALUM COATINGS IRRADIATED WITH He+ IONS ON FLUENCE AND TEMPERATURE

“…One of the advantages of Ta and W is the negligible accumulation of hydrogen isotopes in them, i.e., the insignificant accumulation of radioactive tritium under plasma irradiation. This problem is intensively studied by the authors of [1][2][3][4][5][6][7][8][9][10][11]. The main aims of such investigations are increasing the radiation resistance of the proposed materials and obtaining new materials with improved parameters.…”

“…The main aims of such investigations are increasing the radiation resistance of the proposed materials and obtaining new materials with improved parameters. Processes of capture, retention, and thermal desorption of deuterium and helium that ionimplanted into tungsten [6][7][8][9]11] and tantalum [10] coatings at room temperature were studied. In [10] also the processes going at the deuterium implantation into Ta and W coatings irradiated with D + ions were studied at elevated temperatures of samples.…”