Performance analysis of an inexpensive Direct Imaging Transmission Ion Microscope

A direct imaging transmission ion microscope (DITIM) is built from a modified webcam and a commercially available polonium-210 antistatic device mounted on an optics rail. The performance of the DITIM in radiographic mode is analyzed in terms of the line spread function (\textit{LSF}) and modulation transfer function (\textit{MTF}) for an opaque edge. Limitations of, potential uses for, and suggested improvements to the DITIM are also discussed.