Overall Research Project Description The High Granularity Calorimeter (HGCAL) is a novel detector for measuring the energies of particles produced in proton-proton collisions at the High Luminosity Large Hadron Collider (HL-LHC). The HL-LHC is slated to begin operation in 2029 and construction of the HGCAL has therefore begun in 2023. Silicon sensors will be used throughout the HGCAL to detect the energy deposited by passing charged particles. Designs for these sensors are finalized and production has begun. There is a suite of measurements of the sensor process characteristics that is sensitive to small drifts in the process. Such information needs to be fed back to the vendor to ensure that high quality sensors are delivered over the 2.5-year production run. The purpose of this project is to make those process measurements on production wafers.