Electrode Design for a Cavallo High Voltage Multiplier in a Cryogenic nEDM Experiment
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866910122062643200 |
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| author | Blatnik, Marie A. Clayton, Steven M. Filippone, Bradley W. Ito, Takeyasu M. Phan, Nguyen S. O'Shaughnessy, Christopher M. Ramsey, John C. |
| author_facet | Blatnik, Marie A. Clayton, Steven M. Filippone, Bradley W. Ito, Takeyasu M. Phan, Nguyen S. O'Shaughnessy, Christopher M. Ramsey, John C. |
| contents | The Cavallo multiplier [http://archive.org/details/b28771035_0003] is an electrostatic inductance machine that can generate low-noise high voltages electrically isolated from its voltage input, making it ideally suited for precision experiments. Its in-situ production makes it especially useful in cryogenic experiments, where the use of traditional feedthroughs is challenging due to thermal, electrical, magnetic, and physical size considerations. One such experiment is a cryogenic measurement of the neutron electric dipole moment (nEDM) [arXiv:1908.09937,arXiv:2512.14975], which requires several hundred kilovolts on a measurement cell electrode in 0.4 K liquid helium (LHe). A Cavallo multiplier can generate this voltage by stepping up a smaller input (e.g., 50 kV) from a feedthrough. We designed Cavallo electrodes using finite element analysis to provide high voltage gain and low probability of electrical breakdown in the experimental apparatus. The final geometry achieves a gain of 18, providing a target of 650 kV with peak electric fields of 116 kV/cm distributed over small areas to limit breakdown risk. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_10313 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Electrode Design for a Cavallo High Voltage Multiplier in a Cryogenic nEDM Experiment Blatnik, Marie A. Clayton, Steven M. Filippone, Bradley W. Ito, Takeyasu M. Phan, Nguyen S. O'Shaughnessy, Christopher M. Ramsey, John C. Instrumentation and Detectors The Cavallo multiplier [http://archive.org/details/b28771035_0003] is an electrostatic inductance machine that can generate low-noise high voltages electrically isolated from its voltage input, making it ideally suited for precision experiments. Its in-situ production makes it especially useful in cryogenic experiments, where the use of traditional feedthroughs is challenging due to thermal, electrical, magnetic, and physical size considerations. One such experiment is a cryogenic measurement of the neutron electric dipole moment (nEDM) [arXiv:1908.09937,arXiv:2512.14975], which requires several hundred kilovolts on a measurement cell electrode in 0.4 K liquid helium (LHe). A Cavallo multiplier can generate this voltage by stepping up a smaller input (e.g., 50 kV) from a feedthrough. We designed Cavallo electrodes using finite element analysis to provide high voltage gain and low probability of electrical breakdown in the experimental apparatus. The final geometry achieves a gain of 18, providing a target of 650 kV with peak electric fields of 116 kV/cm distributed over small areas to limit breakdown risk. |
| title | Electrode Design for a Cavallo High Voltage Multiplier in a Cryogenic nEDM Experiment |
| topic | Instrumentation and Detectors |
| url | https://arxiv.org/abs/2604.10313 |