Development of a 4K Sorption Cooler for ESA’s Darwin Mission: System-Level Design Considerations

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Development of a 4K Sorption Cooler for ESA’s Darwin Mission: System-Level Design Considerations

Burger, J. F. / Brake, H. J. M. / Holland, H. J. / Venhorst, G. / Hondebrink, E. / Meijer, R. J. / Veenstra, T. T. / Rogalla, H. / Coesel, M. / Lozano-Castello, D. / ... [more]

Abstract

Abstract ESA’s Darwin mission is a future space interferometer that consists of six free-flying telescopes. To guarantee a proper mechanical stability of this system, hardly any vibration of the optical system with integrated cryocoolers can be tolerated. This paper presents the system design of a 4.5 K, 10 mW vibration-free sorption cooler chain, of which the helium stage is currently in development under an ESA-TRP contract. A sorption cooler is a favorite option because it has no moving parts and it is, therefore, essentially vibration-free. A two-stage helium/hydrogen cooler is proposed which needs 5 Watts of input power and which applies two passive radiators at 50 K and 80 K. The paper includes the following aspects: system modelling, radiator configurations, activated carbons, different multi-stage cooler options, and integration aspects of the compressor cells with the radiators.

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Document information

Title :

Development of a 4K Sorption Cooler for ESA’s Darwin Mission: System-Level Design Considerations

Contributors:

Burger, J. F. (author) / Brake, H. J. M. (author) / Holland, H. J. (author) / Venhorst, G. (author) / Hondebrink, E. (author) / Meijer, R. J. (author) / Veenstra, T. T. (author) / Rogalla, H. (author) / Coesel, M. (author) / Lozano-Castello, D. (author)

Published in:

Cryocoolers 13 ; 503-512

Publication date :

2005-01-01

Size :

10 pages

ISBN :

978-0-387-23901-9 , 978-0-387-27533-8

DOI :

https://doi.org/10.1007/0-387-27533-9_64

Type of media :

Article/Chapter (Book)