Development of novel detectors for 4D-tracking at BNL

Low Gain Avalanche Detectors, LGADs, are widely considered for fast-timing applications in high energy physics, nuclear physics, precision measurements of rare processes, space science, medical imaging, biology, quantum information among others. Several novel concepts are being pursued to also allow for precision tracking with a 100% fill factor in the same device. At Brookhaven National Laboratory (BNL) we are designing, fabricating and testing several novel concepts based on the LGAD technology for future 4D tracking systems. These devices are being optimized and studied for high radiation environments at hadron colliders, for sparse readout experiments at the Electron Ion Collider (EIC), for low mass detectors at lepton colliders, for extreme environmental conditions in space, for X-ray and low-energy electron detection experiments etc. Strip and pixel sensors with different properties have been fabricated at BNL and tested. Among these ,more notably are sensors with different active thickness, i.e. from 50 um to 20 um, different doping of the gain layer, different electrode geometry etc. The sensors are tested in-house with particles from radioactive sources and lasers, using also dedicated fast-time ASICs.