Versatile Millikelvin Hybrid Cooling Platform for Superconductivity Research

TL;DR

This paper introduces a versatile hybrid dilution cryostat platform that reduces vibrations in quantum experiments by automating a commercial system to operate with or without liquid helium, enhancing magnetic imaging quality.

Contribution

It presents a novel hybrid cryostat design that automates operation modes, significantly reducing vibrations and noise in quantum measurement setups.

Findings

Vibration artefacts are eliminated in magnetic imaging.

The hybrid system operates efficiently with or without liquid helium.

Enhanced stability improves quantum measurement accuracy.

Abstract

Closed cycle $He^{3}-He^{4}$ dilution cryostats became the platform of choice in quantum sciences in the era of helium shortage. However, in many experiments, the mechanical vibrations induced by the pulsed cryocoolers present a significant drawback reflected both in electronic and mechanical noises. Here, we present a hybrid dilution cryostat platform; we have automated a commercial closed-cycle system to operate on a cryocooler or on a liquid helium battery. We implemented a scanning SQUID microscope in the hybrid dilution refrigerator. In this work we show the design of the hybrid setup and how its operation eliminates vibration artefacts in magnetic imaging.