Development of Thick, Long-Lived Carbon Stripper Foils for PSR of LANL

Thick carbon stripper foils (multi-layer thickness ≈ 200 μg/cm2) have been developed for use with 800 MeV, H+ ion beam in the Proton Storage Ring (PSR) at Los Alamos National Laboratory. Foils were prepared by means of the modified controlled ACDC arc discharge method (mCADAD). The lifetime measurements of the foils made by different methods were performed using an 800 MeV proton beam of up to 85 μA in the PSR, and a 3.2 MeV Ne+ ion beam of 3 μA at Tokyo Institute of Technology. The foils made by the mCADAD method showed very long lifetimes, as compared to other foils tested, for both 800 MeV p and 3.2 MeV Ne+ beam bombardments.