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Title: Cryostat for accurate x-ray diffractometry of crystalline helium to 60 mK and 25 MPa

Abstract

A cryostat designed for accurate x-ray diffractometry of crystalline helium and other solidified gases is described and its performance characterized. The cryostat is a rigid tail design. It holds the crystal, grown at pressures up to 25 MPa, in fixed orientation and position independent of the levels of the cryogenic fluids. Such stability is necessary for crystal growth, orientation, characterization, and measurements of x-ray reflection intensities and x-ray scattering. A combination of beryllium and aluminized Mylar x-ray windows permits x-ray access to the specimen crystal over broad angular ranges, essentially 360degree in polar angle and +- 40degree in inclination. At the same time, thermal radiation is small enough to permit temperatures as low as 60 mK to be achieved with a simple dilution refrigerator.

Authors:
;
Publication Date:
Research Org.:
Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, Illinois 61801
OSTI Identifier:
7224552
Resource Type:
Journal Article
Journal Name:
Rev. Sci. Instrum.; (United States)
Additional Journal Information:
Journal Volume: 48:3
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CRYOSTATS; DESIGN; PERFORMANCE; HELIUM; CRYSTAL STRUCTURE; ULTRALOW TEMPERATURE; X-RAY DIFFRACTION; COHERENT SCATTERING; CONTROL EQUIPMENT; CRYOGENIC FLUIDS; DIFFRACTION; ELEMENTS; EQUIPMENT; FLUIDS; NONMETALS; RARE GASES; SCATTERING; THERMOSTATS; 420201* - Engineering- Cryogenic Equipment & Devices

Citation Formats

Heald, S M, and Simmons, R O. Cryostat for accurate x-ray diffractometry of crystalline helium to 60 mK and 25 MPa. United States: N. p., 1977. Web. doi:10.1063/1.1135016.
Heald, S M, & Simmons, R O. Cryostat for accurate x-ray diffractometry of crystalline helium to 60 mK and 25 MPa. United States. https://doi.org/10.1063/1.1135016
Heald, S M, and Simmons, R O. 1977. "Cryostat for accurate x-ray diffractometry of crystalline helium to 60 mK and 25 MPa". United States. https://doi.org/10.1063/1.1135016.
@article{osti_7224552,
title = {Cryostat for accurate x-ray diffractometry of crystalline helium to 60 mK and 25 MPa},
author = {Heald, S M and Simmons, R O},
abstractNote = {A cryostat designed for accurate x-ray diffractometry of crystalline helium and other solidified gases is described and its performance characterized. The cryostat is a rigid tail design. It holds the crystal, grown at pressures up to 25 MPa, in fixed orientation and position independent of the levels of the cryogenic fluids. Such stability is necessary for crystal growth, orientation, characterization, and measurements of x-ray reflection intensities and x-ray scattering. A combination of beryllium and aluminized Mylar x-ray windows permits x-ray access to the specimen crystal over broad angular ranges, essentially 360degree in polar angle and +- 40degree in inclination. At the same time, thermal radiation is small enough to permit temperatures as low as 60 mK to be achieved with a simple dilution refrigerator.},
doi = {10.1063/1.1135016},
url = {https://www.osti.gov/biblio/7224552}, journal = {Rev. Sci. Instrum.; (United States)},
number = ,
volume = 48:3,
place = {United States},
year = {1977},
month = {3}
}