Low-energy calibration of SuperCDMS HVeV cryogenic silicon calorimeters using Compton steps
Cryogenic calorimeters for low-mass dark matter searches have achieved sub-eV energy resolutions, driving advances in both low-energy calibration techniques and our understanding of detector physics. The energy deposition spectrum of gamma rays scattering off target materials exhibits step-like feat...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
21 November, 2025
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| In: |
Physical review
Year: 2025, Volume: 112, Issue: 9, Pages: 1-14 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/jj7w-gkgg |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/jj7w-gkgg Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/jj7w-gkgg 
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| Author Notes: | SuperCDMS Collaboration* |
| Summary: | Cryogenic calorimeters for low-mass dark matter searches have achieved sub-eV energy resolutions, driving advances in both low-energy calibration techniques and our understanding of detector physics. The energy deposition spectrum of gamma rays scattering off target materials exhibits step-like features, known as Compton steps, near the binding energies of atomic electrons. We demonstrate a successful use of Compton steps for sub-keV calibration of cryogenic silicon calorimeters, utilizing four SuperCDMS High-Voltage eV-resolution detectors operated with 0 V bias across the crystal. This new calibration at 0 V is compared with the established high-voltage calibration using optical photons. The comparison indicates that the detector response at 0 V is about 30% weaker than expected, highlighting challenges in detector response modeling for low-mass dark matter searches. |
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| Item Description: | Veröffentlicht: 21. November 2025 *SuperCDMS Collaboration: M.F. Albakry, J. Golatkar, B. von Krosigk [und 147 weitere Personen] Gesehen am 17.03.2026 |
| Physical Description: | Online Resource |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/jj7w-gkgg |