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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    Titel :

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


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

    Erschienen in:

    Erscheinungsdatum :

    2005-01-01


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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