Device simulation of a CMOS pixel detector for MIP tracking

An Integrated Active Pixel Sensor for charged particle tracking based on a novel detector structure has been designed at LEPSI, fabricated and tested in CERN beams. The device, called MIMOSA, has been simulated using the ToSCA package and Monte-Carlo analysis. This fast simulation allows to test all the parameters of the geometry (diodes, N-and P-wells, epitaxial region). Our calculations are in good agreement with all measurements, and confirm the high-potential of this kind of detector for high-efficiency MIP detection with 10 μm spatial resolution.