The High Energy Solar Spectroscopic Imager (HESSI) spacecraft was launched on February 5, 2002. It now observes the Sun with the finest angular and energy resolutions ever achieved from a few keV to hundreds of keV, using an array of nine germanium detectors operating at 75K. The spacecraft was originally scheduled for launch in July 2000, but a vibration facility mishap damaged the primary structure of the spacecraft, along with the cryocooler, This paper describes issues in the qualification of a replacement for the original flight cooler, and describes early on-orbit performance.


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    Title :

    Final Qualification and Early On-Orbit Performance of the HESSI Cryocooler


    Contributors:
    Boyle, R. F. (author) / Banks, I. S. (author) / Shirey, K. (author)

    Conference:

    Cryogenic Engineering Conference ; 2001 ; Madison, WI, United States


    Publication date :

    2002-06-01


    Type of media :

    Preprint


    Type of material :

    No indication


    Language :

    English




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