Thermal and mechanical study of a parametrised cryostat model for optical characterisation of upcoming CMB experiments

Thomas J. L. J. Gascard; Yi Wang; Jon E. Gudmundsson; Eve M. Vavagiakis; Cody J. Duell; Zachary B. Huber; Lawrence T. Lin; Michael D. Niemack; Rodrigo G. Freundt

doi:10.1117/12.3019995

16 August 2024 Thermal and mechanical study of a parametrised cryostat model for optical characterisation of upcoming CMB experiments

Thomas J. L. J. Gascard, Yi Wang, Jon E. Gudmundsson, Eve M. Vavagiakis, Cody J. Duell, Zachary B. Huber, Lawrence T. Lin, Michael D. Niemack, Rodrigo G. Freundt

Author Affiliations +

Proceedings Volume 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII; 131022O (2024) https://doi.org/10.1117/12.3019995
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Current and future experiments observing the cosmic microwave background require a detailed understanding of optical performance at cryogenic temperatures. Pre-deployment analysis of optics can be performed in custom-engineered cryogenic test beds, such as Mod-Cam, a first light camera for the CCAT project. This work presents studies of the mechanical and thermal performance of CryoSim, a model of a generic cylindrical 4-K cryostat cooled with a commercial pulse tube cryocooler that can be used to characterise optical components and full reimaging optical systems. CryoSim is extensively parametrised, allowing the joint analysis and optimisation of mechanical and thermal performance via finite element methods. Results from this model are validated against measured cooldown data of the Mod-Cam cryostat. Due to the extensive parametrisation of the model, significant modifications of the cryostat geometry may be implemented to be representative of any system the scientific community may desire, and validation of thermal and mechanical performance can be carried out rapidly.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Thomas J. L. J. Gascard, Yi Wang, Jon E. Gudmundsson, Eve M. Vavagiakis, Cody J. Duell, Zachary B. Huber, Lawrence T. Lin, Michael D. Niemack, and Rodrigo G. Freundt "Thermal and mechanical study of a parametrised cryostat model for optical characterisation of upcoming CMB experiments", Proc. SPIE 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII, 131022O (16 August 2024); https://doi.org/10.1117/12.3019995

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