Thickness Variations and Lifetimes of Carbon Foils under Nitrogen-ion Bombardment

摘要: The deposition of carbon upon foils and the lifetimes during bombardment by nitrogen ions have been investigated under various experimental conditions. rate depends energy current density bombarding ions, as well condition vacuum. For ion energies 0.125-1.5 MeV/atom densities 0.25-13.0 μA/cm2, increases in areal up to 40% for 10 μg/cm2 observed conditions typically employed nuclear physics beam-foil spectroscopy. source deposited appears be carbon-containing molecules residual gas vacuum system. Elimination has achieved surrounding foil with a cooled baffle. lifetime (time until breakage) is found be, at given per atom, time required constant number atoms bombarded foil.