Characterization of Small-Pitch 3D Silicon Sensors For Applications in Physics & Astronomy

Many experiments in diverse research areas including high energy particle physics, medical physics, and astronomy call for particle radiation detectors with excellent resolution in both space and time that can also be operated in extreme radiation environments. Silicon detectors with segmented electrodes, called pixel detectors, have proven over several decades to be a crucial technology for meeting this need. However, in order to continue to push the capabilities of experimental endeavors involving high radiation, new sensor designs are necessary. 3D silicon sensors are a novel sensor technology first implemented in an experiment less than a decade ago, when they were installed to detect particles near the collision point in the Large Hadron Collider. Since that time, the technology has continued to improve. Newly designed sensors that have potential to outperform existing sensors in both spatial and timing resolution and exhibit greater resistance to high radiation doses have been irradiated at New Mexico national labs and measurements are underway to test their electrical characteristics as a function of radiation dose. Test stands are being developed to measure the timing resolution and charge collection response of these sensors in order to demonstrate their ability to outperform previously designed detectors and motivate their use in future experiments. The development and design of these test stands will be discussed, and preliminary results of characterization measurements will be shown.

This research is based upon work supported by the New Mexico Space Grant Consortium (NMSGC) Space Grant Fellowship through a NASA Cooperative Agreement No. NM-80NSSC20M0034