Low Background Materials and Fabrication Techniques for Cables and Connectors in the Majorana Demonstrator

Understand

The MAJORANA Collaboration is searching for the neutrinoless double-beta decay of the nucleus Ge-76.

• The MAJORANA DEMONSTRATOR is an array of germanium detectors deployed with the aim of implementing background reduction techniques suitable for a tonne scale Ge-76-based search (the LEGEND collaboration).
• In the DEMONSTRATOR, germanium detectors operate in an ultra-pure vacuum cryostat at 80 K.
• One special challenge of an ultra-pure environment is to develop reliable cables, connectors, and electronics that do not significantly contribute to the radioactive background of the experiment.