Abstract
A classic electrostatic induction machine, Cavallo's multiplier, is suggested for in situ production of very high voltage in cryogenic environments. The device is suitable for generating a large electrostatic field under conditions of very small load current. Operation of the Cavallo multiplier is analyzed, with quantitative description in terms of mutual capacitances between electrodes in the system. A demonstration apparatus was constructed, and measured voltages are compared to predictions based on measured capacitances in the system. The simplicity of the Cavallo multiplier makes it amenable to electrostatic analysis using finite element software, and electrode shapes can be optimized to take advantage of a high dielectric strength medium such as liquid helium. A design study is presented for a Cavallo multiplier in a large-scale, cryogenic experiment to measure the neutron electric dipole moment.
| Original language | English |
|---|---|
| Article number | P05017 |
| Journal | Journal of Instrumentation |
| Volume | 13 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 14 2018 |
Funding
This work was supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics contract number DE-AC52-06NA25396 under Field Work Proposal 2019LANLEEDM, and the National Science Foundation (1506459).
Keywords
- Cryogenic detectors
- Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc)
- Noble liquid detectors (scintillation, ionization, double-phase)
- Time projection Chambers (TPC)