Speaker
Description
Traditionally used for photon detection, superconducting Transition-edge Sensors (TESs) take on a new role in the PTOLEMY project as we investigate their application for electron detection to establish the existence of relic neutrinos. PTOLEMY requires TESs with 50 meV energy resolution for discerning electrons in the tens of eV range. Our focus is on exploring TES detectors' response to low-energy electrons—an unexplored area. For electron generation at low temperatures, we are exploiting both field emission from carbon nanotubes and photoemission from a thin aluminium foil exposed to UV photons. The study provides insights into TES device design and integration with the low-energy cryogenic electron source, marking a significant advancement for PTOLEMY and applications requiring electron detectors capable of discriminating single low-energy electrons with excellent energy resolution and low dark count rates.
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