Electronic Resource
Copenhagen
:
International Union of Crystallography (IUCr)
Applied crystallography online
10 (1977), S. 18-20
ISSN:
1600-5767
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Geosciences
,
Physics
Notes:
The cooling of single-crystal samples to helium temperatures within a four-circle neutron diffractometer has been achieved by a novel continuous-flow system. The system relies solely on helium for its cooling power with two flow circuits being used. The first delivers liquid to a reservoir cryostat of capacity 1–4 l located close to the Eulerian cradle of the diffractometer and the second draws the refrigerant from this cryostat via a flexible transfer tube into the sample region of a compact cooling unit mounted off the cradle. This arrangement allows unhindered motion of the diffractometer circles for sample temperature operation in the range 3.9–300 K. The system requires a total helium flow of 1.0 l h−1 to maintain a temperature of 20±0.1 K, decreasing to 0.5 l h−1 at higher temperatures.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0021889877012710
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