Spectroscopy of high-energy ions with Timepix3

We present measurements of high-energy ions with the Timpepix3, a compact, single-layer pixelated radiation detector, developed by the Medipix3 Collaboration. We discuss some novel types of information that can be gleaned from the time-of-arrival information provided by the detector. We demonstrate precise energy measurements for ions with moderate stopping powers. We compare data with predictions from Landau-Vavilov theory, and find good agreement, particularly at high incidence angles, relative to the detector surface normal. Higher stopping powers pose a problem with the detector, as it is unable to measure energy deposits larger than about 500 keV per pixel.