Co-axial interconnect for low temperature applications

An electrical interconnect for use at cryogenic temperatures, wherein the electrical interconnect comprises:

• an inner electrical conductor,
• an electrically insulating layer that substantially surrounds the inner electrical conductor,
• an outer electrical conductor substantially co-axial with the inner electrical conductor, and
• a heat transfer element, wherein the heat transfer element comprises an electrically insulating material, wherein the heat transfer element comprises a thermal conductivity which is larger than a thermal conductivity of the electrically insulating layer,
• wherein the heat transfer element is arranged in an opening in the insulating layer and is configured for thermally connecting the inner electrical conductor with the outer electrical conductor,
• wherein the electrical interconnect further comprises a thermal interface material, wherein the thermal interface material is located between the heat transfer element and the inner electrical conductor.