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AMS-02 Cryocooler Baseline Configuration and Engineering Model Qualification Test ResultsFour Sunpower M87N Stirling-cycle cryocoolers will be used to extend the lifetime of the Alpha Magnetic Spectrometer-02 (AMS-02) experiment. The cryocoolers will be mounted to the AMS-02 vacuum case using a structure that will thermally and mechanically decouple the cryocooler from the vacuum case while providing compliance to allow force attenuation using a passive balancer system. The cryocooler drive is implemented using a 60Hz pulse duration modulated square wave. Details of the testing program, mounting assembly and drive scheme will be presented. AMS-02 is a state-of-the-art particle physics detector containing a large superfluid helium-cooled superconducting magnet. Highly sensitive detector plates inside the magnet measure a particle s speed, momentum, charge, and path. The AMS-02 experiment, which will be flown as an attached payload on the International Space Station, will study the properties and origin of cosmic particles and nuclei including antimatter and dark matter. Two engineering model cryocoolers have been under test at NASA Goddard since November 2001. Qualification testing of the engineering model cryocooler bracket assembly is near completion. Delivery of the flight cryocoolers to Goddard is scheduled for September 2003.
Document ID
20040013449
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Banks, Stuart
Breon, Susan
Shirey, Kimberly
Date Acquired
August 21, 2013
Publication Date
September 1, 2003
Subject Category
Fluid Mechanics And Thermodynamics
Meeting Information
Meeting: 20th Space Cryogenic Workshop
Location: Girdwood, AK
Country: United States
Start Date: September 18, 2003
End Date: September 19, 2003
Funding Number(s)
CONTRACT_GRANT: AMS-02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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