Speaker
Dr
Oleksii Girka
(V.N. Karazin Kharkiv National University)
Description
Polished tungsten sample with purity 99.99% wt. has been exposed to Ar ion beam generated by FALCON ion source. Typical parameters during steady-state expose were the following: Ar ion flux was 2-3×10^22 m-2s-1, heat flux was about 3 MW m-2, average ion energy of 2 keV and the ion fluence reaches 10^27 m-2. During the exposures, the temperature of sample reaches 1200 K. Following the exposure, SEM study revealed that surface is populated with castle-like structures with density of 2-3 features per mm2. Their shape is distinguished by high height-to-diameter aspect ratio and pronounced asymmetry. Typical height of the structures exceeds what has been reported in the literature (1-100 um) and reaches 0.3-0.4 mm.
Primary authors
Dr
Oleksii Girka
(V.N. Karazin Kharkiv National University)
Prof.
Oleksandr Bizyukov
(V. N. Karazin Kharkiv National University)
Mrs
Yuliia Balkova
(V. N. Karazin Kharkiv National University)
Mr
Maksym Myroshnyk
(V. N. Karazin Kharkiv National University)
Dr
Ivan Bizyukov
(V. N. Karazin Kharkiv National University)
