Author: Hattori, T.
Paper Title Page
THPS036 Development of Thin NCS-foils by N+ Ion Beam Sputtering and Their Characteristics 3499
 
  • I. Sugai, H. Kawakami, M. Oyaizu, Y. Takeda
    KEK, Ibaraki, Japan
  • T. Hattori, K.K. Kawasaki
    RLNR, Tokyo, Japan
 
  We have de­vel­oped thin Ni­tride Car­bon Strip­per foils (NCS-foil) with a high­er ni­tro­gen con­tent by ion beam sput­ter­ing method with re­ac­tive ni­tro­gen gas. Such NCS-foils have been demon­strat­ed that the foils in range of 10-25 ug/m2 have shown long-life­time as strip­per foil against high in­ten­si­ty heavy ion beam bom­bard­ment. From the re­sults, we found that the ni­tro­gen el­e­ment in the car­bon foils plays very im­por­tant role of the foil life­time. There­fore, in order to in­ves­ti­gate fur­ther in­flu­ence of the life­time on the ni­tro­gen amount in the NCS-foils, we mea­sured the sput­ter­ing yield at the dif­fer­ent sput­ter­ing an­gles and car­bon source ma­te­ri­als. We also mea­sured the ratio of ni­tro­gen in car­bon foil made at the dif­fer­ent sput­ter­ing an­gles, tar­get ma­te­ri­als and the sput­ter­ing volt­ages of 4-15 kV by means of RBS method. The foil-life­time made in above dif­fer­ent con­di­tions was mea­sured with a 3.2 MeV Ne+ ion beam. The life­time does not es­sen­tial­ly de­pend on the sput­ter­ing an­gles and the tar­get ma­te­ri­als, and the max­i­mum and av­er­age life­times showed 240 and 40 times longer than that of the CM-best foils.