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Detection of Low-Energy Electrons with Transition-Edge Sensors

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arxiv 2405.19475 v2 pith:3OPKOGEG submitted 2024-05-29 physics.ins-det

Carlo Pepe , Benedetta Corcione , Francesco Pandolfi , Hobey Garrone , Eugenio Monticone , Ilaria Rago , Gianluca Cavoto , Alice Apponi
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Alessandro Ruocco Federico Malnati Danilo Serazio Mauro Rajteri
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classification physics.ins-det
keywords electronsenergyrangedetectionlow-energyresolutionsamesensors
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abstract

We present the first detection of electrons with kinetic energy in the 100 eV range with transition-edge sensors (TESs). This has been achieved with a $(100\times 100)$ $\mu$m$^2$ Ti-Au bilayer TES, with a critical temperature of about 84 mK. The electrons are produced directly in the cryostat by an innovative cold source based on field emission from vertically-aligned multiwall carbon nanotubes. We obtain a Gaussian energy resolution between 0.8 and 1.8 eV for fully-absorbed electrons in the $(90-101)$ eV energy range, which is found to be compatible with the resolution of this same device for photons in the same energy range. This work opens new possibilities for high-precision energy measurements of low-energy electrons.

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