How do I check/determine the likelihood of accelerating an impurity ion species through the same beam path as the probing beam in a HI-ERDA experiment?

I am using a 26MeV Cu7+ beam from a 5MV tandem for Heavy Ion ERD measurements. In addition to the scattered incident beam (for heavy element targets), I also keep getting an artefact that looks...

05 April 2013 6,814 3 View