Scanning transmission ion microscopy in Shanghai scanning proton microprobe system

Based on the scanning proton microprobe system in Shanghai Institute of Applied Physics, scanning transmission ion microscopy(STIM) experimentation were carried out and simulated by SIMNRA procedure. A paraffin-embedded slice of rat’s thighbone and a thin small ball were tested by on-axis and off-axis STIM respectively. P_STIM software dedicated to STIM analysis of thin samples using proton beams was developed, which includes the reconstruction of the median filtering energy loss image of the sample, as well as accurate calculation of sample thickness of the scanning regions. Theoretical analysis and experimental results showed that median filtering used to reduce the data acquired by on-axis detection provides quantitative areal density distribution results and energy-window filtering m