Spatial resolution of BAS-SR imaging plate based on slit method

The imaging plate is an important tool in high power laser-matter interactions. The slit method is employed to measure the modulation transfer function of Fuji BAS-SR IP. Meanwhile, periodic streaks are used to verify the result. The cut-off space frequency of SR IP up to 17 lp/mm is demonstrated. The spatial dispersion of IP is simulated by the MC code FLUKA when it exposed to the 17.5 keV X-ray. Compared to the spatial dispersion of image scanned by scanner, much less spatial dispersion is engendered by IP. The results are helpful for the quantitative measure of IP, and improving the spatial resolution of IP in the experiments.