The High Voltage Feedthroughs for the ATLAS Liquid Argon Calorimeters

TL;DR

This paper details the design, construction, and testing of high voltage feedthroughs and filters for the ATLAS Liquid Argon calorimeters, ensuring reliable operation at cryogenic temperatures and high voltages in a collider environment.

Contribution

It introduces a novel design and testing methodology for high voltage feedthroughs that operate reliably in cryogenic and high-radiation conditions of the LHC.

Findings

Feedthroughs operate safely at 2.5 kV without degradation.

Design maintains electrical and cryogenic integrity.

Successful testing confirms system reliability.

Abstract

The purpose, design specifications, construction techniques, and testing methods are described for the high voltage feedthrough ports and filters of the ATLAS Liquid Argon calorimeters. These feedthroughs carry about 5000 high voltage wires from a room-temperature environment (300 K) through the cryostat walls to the calorimeters cells (89 K) while maintaining the electrical and cryogenic integrity of the system. The feedthrough wiring and filters operate at a maximum high voltage of 2.5 kV without danger of degradation by corona discharges or radiation at the Large Hadron Collider.