Towards Low-Energy Electron High-Resolution Spectroscopy with Transition-Edge Sensors
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| Format: | Preprint |
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2026
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| author | Ammendola, R. Apponi, A. Benato, G. Betti, M. G. Biondi, R. Bos, P. Cadeddu, M. Casale, A. Castellano, O. Cavoto, G. Cecchini, L. Celasco, E. Chirico, M. Chung, W. Cocco, A. G. Colijn, A. P. Corcione, B. D'Ambrosio, N. D'Incecco, M. De Bellis, G. De Deo, M. de Groot, N. Esposito, A. Farino, M. Farinon, S. Ferella, A. D. Ferro, L. Ficcadenti, L. Muscio, G. Galbato Gariazzo, S. Garrone, H. Gatti, F. Malnati, F. Mangano, G. Marcucci, L. E. Mariani, C. Mead, J. Menichetti, G. Messina, M. Monticone, E. Naafs, M. Nagorny, S. Narcisi, V. Pandolfi, F. Pavarani, R. Pepe, C. Heros, C. Perez de los Pisanti, O. Pofi, F. M. Polosa, A. D. Rago, I. Rajteri, M. Ritarossi, S. Rossi, N. Ruocco, A. Salina, G. Santucci, A. Sestu, M. Tan, A. Tozzini, V. Tully, C. G. van Rens, I. Virzi, F. Visser, G. Viviani, M. |
| author_facet | Ammendola, R. Apponi, A. Benato, G. Betti, M. G. Biondi, R. Bos, P. Cadeddu, M. Casale, A. Castellano, O. Cavoto, G. Cecchini, L. Celasco, E. Chirico, M. Chung, W. Cocco, A. G. Colijn, A. P. Corcione, B. D'Ambrosio, N. D'Incecco, M. De Bellis, G. De Deo, M. de Groot, N. Esposito, A. Farino, M. Farinon, S. Ferella, A. D. Ferro, L. Ficcadenti, L. Muscio, G. Galbato Gariazzo, S. Garrone, H. Gatti, F. Malnati, F. Mangano, G. Marcucci, L. E. Mariani, C. Mead, J. Menichetti, G. Messina, M. Monticone, E. Naafs, M. Nagorny, S. Narcisi, V. Pandolfi, F. Pavarani, R. Pepe, C. Heros, C. Perez de los Pisanti, O. Pofi, F. M. Polosa, A. D. Rago, I. Rajteri, M. Ritarossi, S. Rossi, N. Ruocco, A. Salina, G. Santucci, A. Sestu, M. Tan, A. Tozzini, V. Tully, C. G. van Rens, I. Virzi, F. Visser, G. Viviani, M. |
| contents | We present a study of the energy resolution of transition-edge sensors (TESs) for the detection of electrons in the 100 eV kinetic energy range. The TES is a Ti-Au bilayer with an active area of $(60 \times 60)$ $μ\text{m}^2$ and a critical temperature of $\sim$ 80 mK. The electron source is based on vertically-aligned multiwall carbon nanotubes located inside the cryostat, with electrons generated via field emission. For electrons in the (92 - 99) eV kinetic energy range, we obtain a Gaussian energy resolution for fully-absorbed electrons of (0.479 $\pm$ 0.041 $\pm$ 0.055) eV. When considering the full-width at half-maximum of the peak, the corresponding resolution is of (1.44 $\pm$ 0.17 $\pm$ 0.27) eV. The former represents an improvement of (46 - 60)% with respect to previous results, and is mainly attributed to the reduction in the TES active area. The latter is instead an improvement of over a factor of 20, and is mainly due to the reduction in the emitting area of the electron source, which significantly suppresses electron back-scattering in proximity of the TES. These results represent a major milestone toward high-precision spectroscopy on low-energy electrons, which is a key objective for the PTOLEMY experiment. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_21694 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Towards Low-Energy Electron High-Resolution Spectroscopy with Transition-Edge Sensors Ammendola, R. Apponi, A. Benato, G. Betti, M. G. Biondi, R. Bos, P. Cadeddu, M. Casale, A. Castellano, O. Cavoto, G. Cecchini, L. Celasco, E. Chirico, M. Chung, W. Cocco, A. G. Colijn, A. P. Corcione, B. D'Ambrosio, N. D'Incecco, M. De Bellis, G. De Deo, M. de Groot, N. Esposito, A. Farino, M. Farinon, S. Ferella, A. D. Ferro, L. Ficcadenti, L. Muscio, G. Galbato Gariazzo, S. Garrone, H. Gatti, F. Malnati, F. Mangano, G. Marcucci, L. E. Mariani, C. Mead, J. Menichetti, G. Messina, M. Monticone, E. Naafs, M. Nagorny, S. Narcisi, V. Pandolfi, F. Pavarani, R. Pepe, C. Heros, C. Perez de los Pisanti, O. Pofi, F. M. Polosa, A. D. Rago, I. Rajteri, M. Ritarossi, S. Rossi, N. Ruocco, A. Salina, G. Santucci, A. Sestu, M. Tan, A. Tozzini, V. Tully, C. G. van Rens, I. Virzi, F. Visser, G. Viviani, M. Instrumentation and Detectors We present a study of the energy resolution of transition-edge sensors (TESs) for the detection of electrons in the 100 eV kinetic energy range. The TES is a Ti-Au bilayer with an active area of $(60 \times 60)$ $μ\text{m}^2$ and a critical temperature of $\sim$ 80 mK. The electron source is based on vertically-aligned multiwall carbon nanotubes located inside the cryostat, with electrons generated via field emission. For electrons in the (92 - 99) eV kinetic energy range, we obtain a Gaussian energy resolution for fully-absorbed electrons of (0.479 $\pm$ 0.041 $\pm$ 0.055) eV. When considering the full-width at half-maximum of the peak, the corresponding resolution is of (1.44 $\pm$ 0.17 $\pm$ 0.27) eV. The former represents an improvement of (46 - 60)% with respect to previous results, and is mainly attributed to the reduction in the TES active area. The latter is instead an improvement of over a factor of 20, and is mainly due to the reduction in the emitting area of the electron source, which significantly suppresses electron back-scattering in proximity of the TES. These results represent a major milestone toward high-precision spectroscopy on low-energy electrons, which is a key objective for the PTOLEMY experiment. |
| title | Towards Low-Energy Electron High-Resolution Spectroscopy with Transition-Edge Sensors |
| topic | Instrumentation and Detectors |
| url | https://arxiv.org/abs/2602.21694 |