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A mechanically refrigerated gas stream (to ‐120°C) and some useful accessories
Author(s) -
Lippman R.,
Rudman R.
Publication year - 1976
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/s002188987601100x
Subject(s) - precession , rotation (mathematics) , oscillation (cell signaling) , optics , heat exchanger , materials science , physics , chemistry , computer science , thermodynamics , astronomy , artificial intelligence , biochemistry
A system for cooling a stream of dry air to −120°C is described. Mechanically refrigerated cooling units are used to maintain the cold baths in which heat exchangers are immersed. Adapters for converting a precession camera to a flat‐plate oscillation‐rotation camera and for mounting crossed polaroids on the precession camera are described. These devices are particularly useful for examining and aligning crystals grown in situ at low temperatures. They can also be used for aligning crystals on the precession camera even when monochromated radiation is used.