Efficiency and timing performance of the MuPix7 high-voltage monolithic active pixel sensor

Abstract The MuPix7 is a prototype high voltage monolithic active pixel sensor with 103 × 80 μ m 2 pixels thinned to 64 μ m and incorporating the complete read-out circuitry including a 1.25  Gbit/s differential data link. Using data taken at the DESY electron test beam, we demonstrate an efficiency of 99.3  % and a time resolution of 14  ns. The efficiency and time resolution are studied with sub-pixel resolution and reproduced in simulations.