30 kV coaxial vacuum-tight feedthrough for operation at cryogenic temperatures

TL;DR

This paper presents a design for a 30 kV coaxial vacuum-tight feedthrough suitable for cryogenic applications, enabling safe high voltage operation in noble gas detectors without surface discharges.

Contribution

It introduces a novel coaxial feedthrough design with a grounded sheath for high voltage transfer into cryogenic liquids, enhancing safety and reliability in noble gas detectors.

Findings

Operates reliably at up to 30 kV in cryogenic environments

Prevents surface discharges in gas phase above liquids

Suitable for use in liquefied noble gas ionization detectors

Abstract

In this paper we describe the technology of building a vacuum-tight high voltage feedthrough which is able to operate at voltages up to 30 kV. The feedthrough has a coaxial structure with a grounded sheath which makes it capable to lead high voltage potentials into cryogenic liquids, without risk of surface discharges in the gas phase above the liquid level. The feedthrough is designed to be used in ionization detectors, based on liquefied noble gases, such as Argon or Xenon.