X-ray Response of the Fully-Depleted, p-Channel SiSeRO-CCD
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866917380914937856 |
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| author | Cuevas-Zepeda, Julian Noonan, Joseph Chavez, Claudio Sofo-Haro, Miguel Saffold, Nathan Estrada, Juan Donlon, Kevan Leitz, Chris Holland, Steve |
| author_facet | Cuevas-Zepeda, Julian Noonan, Joseph Chavez, Claudio Sofo-Haro, Miguel Saffold, Nathan Estrada, Juan Donlon, Kevan Leitz, Chris Holland, Steve |
| contents | We present an X-ray characterization of a fully depleted, 725 $μ$m thick p-channel SiSeRO CCD. Measurements with a $^{55}$Fe source yield an energy resolution of $54 \pm 0.9$ eV ($14.6 \pm 0.25 e^{-}$) at 5.9 keV for single-pixel events, demonstrating that the SiSeRO amplifier preserves the intrinsic charge resolution of the CCD under multi-sample non-destructive readout. Characterization with a $^{241}$Am source extends the response to higher-energy photons, with reconstructed spectral features observed between 9-26 keV and the 59.5 keV $γ$ emission. These measurements, together with a muon-derived diffusion calibration, show that charge transport and diffusion are consistent with interactions spanning the full sensor depth. These results demonstrate that the SiSeRO CCD simultaneously achieves sub-electron noise performance and efficient charge collection in a thick, fully depleted silicon detector. This combination enables X-ray spectroscopy across a broad energy range while maintaining sensitivity to faint signals. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_02272 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | X-ray Response of the Fully-Depleted, p-Channel SiSeRO-CCD Cuevas-Zepeda, Julian Noonan, Joseph Chavez, Claudio Sofo-Haro, Miguel Saffold, Nathan Estrada, Juan Donlon, Kevan Leitz, Chris Holland, Steve Instrumentation and Detectors Instrumentation and Methods for Astrophysics We present an X-ray characterization of a fully depleted, 725 $μ$m thick p-channel SiSeRO CCD. Measurements with a $^{55}$Fe source yield an energy resolution of $54 \pm 0.9$ eV ($14.6 \pm 0.25 e^{-}$) at 5.9 keV for single-pixel events, demonstrating that the SiSeRO amplifier preserves the intrinsic charge resolution of the CCD under multi-sample non-destructive readout. Characterization with a $^{241}$Am source extends the response to higher-energy photons, with reconstructed spectral features observed between 9-26 keV and the 59.5 keV $γ$ emission. These measurements, together with a muon-derived diffusion calibration, show that charge transport and diffusion are consistent with interactions spanning the full sensor depth. These results demonstrate that the SiSeRO CCD simultaneously achieves sub-electron noise performance and efficient charge collection in a thick, fully depleted silicon detector. This combination enables X-ray spectroscopy across a broad energy range while maintaining sensitivity to faint signals. |
| title | X-ray Response of the Fully-Depleted, p-Channel SiSeRO-CCD |
| topic | Instrumentation and Detectors Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2604.02272 |