TES4e is a PRIN 2022 project funded by the MUR to develop low-temperature microcalorimeters for high-energy- resolution spectroscopy of low-energy electrons. With the final goal of proving the feasibility of using Transition-Edge Sensors (TESs) as low-energy electron spectrometers, TES4e will develop TESs with two distinct designs. One will work in the range of 0-1000 eV with an energy resolution of around 500 meV, while the other will be optimized for energies in the range of 0-50 eV and will provide a better energy resolution of the order of 100 meV.
Energies below 1 keV are typical of the primary beams for X-ray photoelectron spectroscopy, Reflection Electron Energy Loss Spectroscopy, Auger Electron Spectroscopy, and Low Energy
Electron Microscopy. The TES4e detectors'; energy resolution and response function will be assessed in the corresponding energy range of interest. As an innovative tool for high-resolution spectrometry of low-energy electrons, TES4e might also have an impact on particle physics, like in experiments measuring low-energy electrons emitted by tritium in PTOLEMY, either due to inverse beta decay, as in Cosmic Neutrino Background searches, or by beta decay in small-scale prototypes exploited for a direct neutrino mass experiment.
Contributing scientific sectors
