Sub-Micron Resolution of Localized Ion Beam Induced Charge Reduction in Silicon Detectors Damaged by Heavy Ions.

Displacement damage reduces ion beam induced charge (IBIC) through Shockley–Read–Hall recombination. Closely spaced pulses of \200 keV\ \Si^ + + ions focused in a 40 nm beam spot are used to create damage cascades within \0.25 \mu\m^2 areas. Damaged areas are detected through contrast in IBIC signals generated with focused ion beams of \200 \keV\ \Si^ + + ions and \60 keV\ \Li^+ ions. IBIC signal reduction can be resolved over sub-micron regions of a silicon detector damaged by as few as 1000 heavy ions. [ABSTRACT FROM PUBLISHER]