Operation of a continuous flow liquid helium magnetic microscopy cryostat as a closed cycle system

Barr, K. and Cookson, T. and Lagoudakis, K. G. (2021) Operation of a continuous flow liquid helium magnetic microscopy cryostat as a closed cycle system. Review of Scientific Instruments, 92 (12). 123701. ISSN 0034-6748 (https://doi.org/10.1063/5.0065560)

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Abstract

We demonstrate successful operation of a continuous flow liquid helium magnetic cryostat (Oxford Instruments, Microstat MO) in closed cycle operation using a modular cryocooling system (ColdEdge Technologies, Stinger). For the system operation, we have developed a custom gas handling manifold and we show that despite the lower cooling power of the cryocooler with respect to the nominal cryostat cooling power requirements, the magnetic cryostat can be operated in a stable manner. We provide the design of the gas handling manifold, and a detailed analysis of the system performance in terms of cooling times, magnetic field ramping rates and vibrations at the sample. Base temperature can be reached within 10 hours while the superconducting magnet can be energized at a ramping rate of 0.5 T/min. Vibrations are measured interferometrically and show amplitudes with a root mean square on the order of 5 nm permitting the use of the system for sensitive magnetic microscopy experiments.

ORCID iDs

Barr, K., Cookson, T. and Lagoudakis, K. G. ORCID logoORCID: https://orcid.org/0000-0002-4410-4755;
  • Item type:Article
    ID code:78684
    Dates:
    Date
    Event
    3 December 2021
    Published
    3 December 2021
    Published Online
    12 November 2021
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:24 Nov 2021 15:58
    Last modified:11 Nov 2024 13:18
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/78684
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