FORMATION OF LONG LIVED CHn2+ AND CDn2+ DICATIONS Y. Levy#, A. Bar-David#, I. Ben-Itzhak*, I. Gertner#, and B. Rosner# #Department of Physics, Technion, Haifa, 32000, Israel *J.R. Macdonald Laboratory, Physics Department, Kansas State University, Manhattan, KS 66506 USA We present measurements of the production cross sections of CDn2+ (and CHn2+) molecular ions from the respective CDm+ (m?n) molecular ions in fast charge stripping collisions with Ar atoms. Long lived CD22+, CD42+ and CD52+ dications were observed. In contrast, no CD2+ or CD32+ were detected. CD42+ and CD52+ were created only from CD4+ and CD5+, respectively, while CD22+ was formed from all CDm+ (m=2-5) molecular ions. The mean lifetime of CD22+ was measured to be 3.8?1.1 ms and a lower limit for CD4+ and CD5+, respectively.