Noise Modeling and Calibration of a Two-Stage Cryogenic Charge Amplifier for the SPLENDOR Experiment
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916985085886464 |
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| author | Anczarski, Jadyn Andrews, Owen Aralis, Taylor Fink, Caleb Kurinsky, Noah Phipps, Arran Pradeep, Aditi Young, Betty A. |
| author_facet | Anczarski, Jadyn Andrews, Owen Aralis, Taylor Fink, Caleb Kurinsky, Noah Phipps, Arran Pradeep, Aditi Young, Betty A. |
| contents | The SPLENDOR Collaboration studies novel narrow-gap semiconductors and engineered a substrate agnostic detector platform to achieve $\mathcal{O}$(meV) energy sensitivity designed for low mass dark matter searches. This was achieved using low-capacitance and low-noise commercial CryoHEMTs in a split-stage topology integrated throughout a dilution refrigerator. Designed with a source-follower HEMT at the base temperature stage and a voltage amplifier at 4\,K, this amplifier has input-limited voltage noise of 10 $\text{nV}/\sqrt{\text{Hz}}$ and current noise of 100 $\text{aA}/\sqrt{\text{Hz}}$ at 1kHz. In agreement with this noise level and a photon calibration, this amplifier has a $\text{19} \pm \text{4} $ electron resolution. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_01463 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Noise Modeling and Calibration of a Two-Stage Cryogenic Charge Amplifier for the SPLENDOR Experiment Anczarski, Jadyn Andrews, Owen Aralis, Taylor Fink, Caleb Kurinsky, Noah Phipps, Arran Pradeep, Aditi Young, Betty A. Instrumentation and Detectors The SPLENDOR Collaboration studies novel narrow-gap semiconductors and engineered a substrate agnostic detector platform to achieve $\mathcal{O}$(meV) energy sensitivity designed for low mass dark matter searches. This was achieved using low-capacitance and low-noise commercial CryoHEMTs in a split-stage topology integrated throughout a dilution refrigerator. Designed with a source-follower HEMT at the base temperature stage and a voltage amplifier at 4\,K, this amplifier has input-limited voltage noise of 10 $\text{nV}/\sqrt{\text{Hz}}$ and current noise of 100 $\text{aA}/\sqrt{\text{Hz}}$ at 1kHz. In agreement with this noise level and a photon calibration, this amplifier has a $\text{19} \pm \text{4} $ electron resolution. |
| title | Noise Modeling and Calibration of a Two-Stage Cryogenic Charge Amplifier for the SPLENDOR Experiment |
| topic | Instrumentation and Detectors |
| url | https://arxiv.org/abs/2510.01463 |