Etsuo Ishitsukaa, Hiroshi Kawamuraa, Kan Ashidab, Masao Matsuyamab, Kuniaki Watanabeb, Hiroei Andoa, Yoshiaki Futamuraa
a Japan Atomic Energy Research Instiute, Oarai Research Establishment, Oarai-Machi, Higashi Ibaraki-Gun, Ibaraki-Ken 311-13, Japan
b Hydrogen Isotope Research Center, Toyama University, Gofuku 3190, Toyama 930, Japan
Beryllium is a promising material as a neutron multiplier of the blanket and as a first wall material. To understand the detailed behavior of beryllium under fusion reactor conditions, it is important to study the material characteristics of beryllium. As a first step, we examined surface properties of hot-pressed beryllium before and after vacuum heating, as well as after deuterium ion implantation with X-ray photoelectron spectroscopy. Carbon, fluorine and oxygen were observed on the as-received sample surface, in addition to beryllium. Carbon and fluorine decreased their peak intensities with vacuum heating. The two peaks of Bels were identified as metallic and oxidized beryllium. The deuterium ion implantation caused an increase in the peak intensities of O1s and Be1s of oxide form. This is presumed to be due to impurities in deuterium gas or residual gases in the vacuum system.