Portable Solid Nitrogen Cooling System for High Transition Temperature Superconductive Electronics

In this article, we present a miniature solid nitrogen cooling system designed for high-transition temperature (high-TC) superconductor Josephson devices operating in the temperature range of 40-55 K. The system utilizes a small fiberglass Dewar and an external pump to solidify nitrogen in thermal contact with a circuit board insert. Our cooling tests of two different Dewars with 100 mL and 200 mL...