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Secondary ion emission from beryllium surfaces by Ar and /or (Ar+D2) mixed ion bombardments |
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| Authors: | Kan Ashida Masao Matsuyama Kuniaki Watanabe Hiroshi Kawamura and Etsuo Ishitsuka |
| Affiliation: | a Hydrogen Isotope Research Center, Toyama University, Gofuku 3190, Toyama 930, Japan b Japan Atomic Energy Research Institute, Oarai Research Establishment, Oarai-Machi, Higashi Ibaraki-Gun, Ibaraki 311-13, Japan |
| Abstract: | With respect to the impurity emission and erosion of a Be first wall, a secondary ion mass spectrometric investigation was carried out along with surface characterization with X-ray photoelectron spectroscopy. It was found that Be is emitted as distinct types of chemical forms from the surface owing to sputtering with Ar+ and an (Ar++ D+2) mixture: (i) Be and Be-cluster, (ii) oxide and hydroxide, and (iii) hydride and/or deuteride. |
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