The 4DInSiDe project sets out to improve some features of UFSD sensors, a new concept in sensor design to measure both the space and time resolution of a charged particle, with greater precision.

Specifically, the project is aimed at applications where 100% of active sensitive area is necessary (sensors with pixels of just a few hundred microns or fewer) and/or the reduction of the total thickness of the sensor of optic entrance window (allowing the use of these sensors for detection of low-energy x-ray photons).

The project is the result of a partnership between INFN (Turin and Genoa sections), the University of Turin and the University of Perugia.