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Evaluation of carbon stripper foils produced by a nitrogen ion beam sputtering method |
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| Authors: | Hideshi Muto Michihiro Oyaizu Katsunori Kawasaki Toshiyuki Hattori |
| Institution: | 1. Center of General Education and Humanities, Tokyo University of Science , Suwa, Toyohira, Chino, Japan hideshi@bf.wakwak.com;3. Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization , Oho, Tsukuba, Ibaraki, Japan;4. Department of Physics , Tokyo Institute of Technology , O-okayama, Meguro-ku, Tokyo, Japan;5. Research Laboratory for Nuclear Reactors , Tokyo Institute of Technology , O-okayama, Meguro-ku, Tokyo, Japan |
| Abstract: | Carbon stripper foils having thicknesses in the range of 5–40 μg/cm2 have been prepared by a nitrogen ion beam sputtering method and their lifetimes have been tested in the Van de Graaff accelerator facility with 3.2 MeV, Ne+ ions. The foils of 21 μg/cm2 thickness had the longest mean lifetime of 1350.0 mC/cm2 (irradiation dose of 8.4×1018 atoms/cm2) which was 50 times longer than that of commercial foils. However, foils with other thicknesses had extremely short lifetimes similar to commercial foils. The nitrogen content of the foils of both long and short lifetimes has been determined using elastic scattering of 3 MeV α-particles. |
| Keywords: | carbon stripper foil nitrogen ion beam sputtering heavy ion beam bombardment lifetime |