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Thermal architecture for a cryogenic super-pressure balloon payload: design and development of the Taurus flight cryostat

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arxiv 2410.18150 v1 pith:R4DVI6WK submitted 2024-10-23 physics.ins-det astro-ph.IM

Simon Tartakovsky , Alexandre E. Adler , Jason E. Austermann , Steven J. Benton , Rick Bihary , Malcolm Durking , Shannon M. Duff , Jeffrey P. Filippini
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Aurelien A. Fraisse Thomas J.L.J. Gascard Sho M. Gibbs Suren Gourapura Jon E. Gudmundsson John W. Hartley Johannes Hubmayr William C. Jones Steven Li Jared L. May Johanna M. Nagy Kate Okun Ivan L. Padilla L. Javier Romualdez Michael R. Vissers
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keywords tauruscryogeniccryostatsuper-pressureballoondesignflightsystem
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We describe the cryogenic system being developed for Taurus: a super-pressure balloon-borne microwave polarimeter scheduled to fly in 2027. The Taurus cryogenic system consists of a 660L liquid helium cryostat which achieves a base temperature of <100mK with the help of a capillary-fed superfluid tank and a closed cycle dilution refrigerator. The main tank is supported with fiberglass flexures and is encased in two layers of vapor-cooled shields which allow Taurus to make full use of the extended flight time offered by the super-pressure balloon platform. The Taurus cryostat is projected to hold for over 50 days while weighing under 1000lbs. We present the design, testing, and thermal analysis of the Taurus cryogenic systems.

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  1. $\tau$HK: a modular housekeeping system for cryostats and balloon payloads

    physics.ins-det 2025-05 conditional novelty 6.0 of 10

    τHK is a Eurocard-based housekeeping system that reads resistive and diode thermometers, drives cryogenic heaters, and switches payload power, using an STM32 microcontroller instead of an FPGA.

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