Aman Gupta

Kryotechnik, Untersuchung und Nutzung von Materialien bei sehr niedrigen Temperaturen. Es gibt keine einheitliche Definition f r die Obergrenze kryogener Temperaturen, aber das American National Institute of Standards and Technology hat vorgeschlagen, den Begriff Kryotechnik auf alle Temperaturen unter -150 C anzuwenden. Kryogene Temperaturen werden entweder durch die schnelle Verdampfung fl chtiger Fl ssigkeiten oder durch die Ausdehnung von Gasen erreicht, die zun chst bei Dr cken von 150 bis 200 Atmosph ren eingeschlossen sind. In dieser Arbeit werden die Grundidee hinter dieser Wissenschaft und ihre Anwendungen diskutiert.

Cryog nie, tude et utilisation de mat riaux tr s basse temp rature. La limite sup rieure des temp ratures cryog niques n'a pas fait l'objet d'un accord, mais l'American National Institute of Standards and Technology a sugg r que le terme cryog nie s'applique toutes les temp ratures inf rieures -150 C. Les temp ratures cryog niques sont atteintes soit par l' vaporation rapide de liquides volatils, soit par l'expansion de gaz confin s initialement des pressions de 150 200 atmosph res. Cet ouvrage aborde l'id e de base de cette science et ses applications.

Criogenia, studio e utilizzo di materiali a temperature molto basse. Il limite superiore delle temperature criogeniche non stato concordato, ma l'Istituto Nazionale Americano per gli Standard e la Tecnologia ha suggerito di applicare il termine criogenia a tutte le temperature inferiori a -150 C. Le temperature criogeniche sono raggiunte sia attraverso la rapida evaporazione di liquidi volatili sia attraverso l'espansione di gas confinati inizialmente a pressioni di 150-200 atmosfere. In questo lavoro vengono discusse le idee di base di questa scienza e le sue applicazioni.

Criogenia, estudo e utiliza o de materiais a temperaturas muito baixas. O limite superior das temperaturas criog nicas n o foi acordado, mas o Instituto Nacional Americano de Normas e Tecnologia sugeriu que o termo criogenia fosse aplicado a todas as temperaturas inferiores a -150 C. As temperaturas criog nicas s o atingidas quer pela r pida evapora o de l quidos vol teis quer pela expans o de gases confinados inicialmente a press es de 150 a 200 atmosferas. Neste trabalho s o abordadas as ideias b sicas subjacentes a esta ci ncia e as suas aplica es.

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