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We demonstrate successful operation of a continuous flow liquid heliummagnetic cryostat (Oxford Instruments, Microstat MO) in closed cycle operationusing a modular cryocooling system (ColdEdge Technologies, Stinger). For thesystem operation, we have developed a custom gas handling manifold and we showthat despite the lower cooling power of the cryocooler with respect to thenominal cryostat cooling power requirements, the magnetic cryostat can beoperated in a stable manner. We provide the design of the gas handlingmanifold, and a detailed analysis of the system performance in terms of coolingtimes, magnetic field ramping rates and vibrations at the sample. Basetemperature can be reached within 10 hours while the superconducting magnet canbe energized at a ramping rate of 0.5 T/min. Vibrations are measuredinterferometrically and show amplitudes with a root mean square on the order of5 nm permitting the use of the system for sensitive magnetic microscopyexperiments.

Operation of a Continuous Flow Liquid Helium Magnetic Microscopy Cryostat as a Closed Cycle System