2011 Fiscal Year Final Research Report
Development of carbon stripper foils for J-PARC Accelerators
| Project/Area Number |
21540305
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Tokyo University of Science, Suwa |
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Principal Investigator |
MUTO Hideshi 諏訪東京理科大学, 共通教育センター, 准教授 (80434489)
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| Co-Investigator(Renkei-kenkyūsha) |
HATTORI Toshiyuki 放射線医学総合研究所, 客員研究員 (50134648)
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| Project Period (FY) |
2009 – 2011
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| Keywords | イオンビーム / スパッタリング / 原子核ターゲット / 荷電変換 / 加速器 |
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| Research Abstract |
For over a decade, we have developed super long-lived carbon stripper foils of 1.20μg/cm2 thickness by the heavy ion beam sputtering method. Foils of this thickness are mainly used for heavy ion beams of 100-200 keV/u. Recently, high energy negative proton and heavy ion accelerators have started to use carbon stripper foils of over 100μg/cm2 in thickness. However, the heavy ion beam sputtering method was unsuccessful in production of foils thicker than 50μg/cm2 as resulted in the collapse of carbon particles from substrates during sputtering process. The reproduction probability was less than 25%. The samples of the carbon foil received had surface defects. However, the defects were eliminated by introduction of a substrate heater during sputtering process. In this manuscript we describe a highly reproducible method for thick carbon stripper foils by a heavy ion beam sputtering with krypton and xenon gases.
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