Measurement of lifetimes of thin carbon stripper foils produced by ion-beam sputtering

作者：Takeda Yasuhiro^*; Irie Yoshiro; Sugai Isao; Takagi Akira; Oyaizu Michihiro; Kawakami Hirokane; Hattori Toshiyuki; Kawasaki Katsunori

来源：Vacuum, 2010, 84(12): 1448-1451.

DOI：10.1016/j.vacuum.2010.01.050

• Carbon foil
• Thin foil
• Stripper
• Lifetime
• Ion-beam sputtering

Thin carbon stripper foils used in high-intensity proton accelerators and heavy-ion accelerators must have long lifetimes. Thin carbon foils were fabricated by ion-beam sputtering using reactive and inert gas ions. The lifetime of the foils was measured using a KEK 650-key high-intensity DC H(-) (negative hydrogen ion) beam: changes in the foil thickness and surface deformations during irradiation were investigated. The lifetime of a typical stripper foil fabricated by heavy-ion-beam (Ar and Kr) sputtering was 60-70 times longer than that of the best commercially available foils. This paper reports a fabrication method for carbon stripper foils, along with an investigation of their lifetimes and changes in foil thickness during beam irradiation.

• 出版日期2010-6-25