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  • PHYSICAL SCIENCES  (1)
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    Joule-Thomson Cooler Produces Nearly Constant Temperature (1992)
    In:  Other Sources
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    Publication Date: 2019-07-12
    Description: Improved Joule-Thomson cooler maintains nearly constant temperature. Absolute-pressure relief valve helps stabilize temperature of cold head despite variations in atmospheric pressure. Feedback-controlled electrical heater provides additional stabilization. Demand-flow Joule-Thomson valve requires less nitrogen than fixed-orifice Joule-Thomson valve providing same amount of cooling. Provides stable low temperatures required for operation of such devices as tunable diode lasers in laboratory and balloon-borne instruments detecting contaminants in atmosphere.
    Keywords: PHYSICAL SCIENCES
    Type: NPO-18184 , NASA Tech Briefs (ISSN 0145-319X); 16; 1; P. 41
    Format: text
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    NASA TECHNICAL REPORTS
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