An automatic low‐temperature apparatus for single crystal diffractometry | Zendy

Rudman R. | Zendy; Godel J. B. | Zendy

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An automatic low‐temperature apparatus for single crystal diffractometry

Author(s) -

Rudman R.,

Godel J. B.

Publication year - 1969

Publication title -

journal of applied crystallography

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.429

H-Index - 162

ISSN - 1600-5767

DOI - 10.1107/s0021889869006686

Subject(s) - thermocouple , liquid nitrogen , atmospheric temperature range , nitrogen gas , materials science , volumetric flow rate , analytical chemistry (journal) , signal (programming language) , single crystal , chemistry , thermodynamics , composite material , crystallography , chromatography , physics , organic chemistry , computer science , programming language

A portable apparatus for cooling specimens used in X‐ray and neutron diffraction studies is described. Temperatures in the + 50 to −1 185 °C range can be automatically and continuously maintained within 1 ° of the desired temperature for several weeks. Cold gas is obtained from liquid nitrogen which is boiled off at a rate sufficient to maintain a constant pressure in the sealed Dewar. The temperature‐determining gas‐flow rate is controlled by a pneumatically operated cryogenic valve which responds to a thermocouple signal.

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