On the design and implementation of a novel impedance chamber based variable temperature regulator at liquid helium temperatures

2010 ◽  
Vol 81 (4) ◽  
pp. 045112 ◽  
Author(s):  
R. Nagendran ◽  
N. Thirumurugan ◽  
N. Chinnasamy ◽  
M. P. Janawadkar ◽  
C. S. Sundar
Keyword(s):  
Liquid Helium ◽  
Variable Temperature ◽  
Temperature Regulator ◽  
Design And Implementation

Design and Applications of a Variable-Temperature Diffractometer Specimen Mount

1960 ◽  
Vol 4 ◽  
pp. 201-211 ◽  
Author(s):  
William L. Baun
Keyword(s):  
Low Temperature ◽  
Room Temperature ◽  
Low Voltage ◽  
Variable Temperature ◽  
Aluminum Foil ◽  
Inert Atmosphere ◽  
Phase Changes ◽  
Temperature Phase ◽  
Temperature Regulator ◽  
Temperature Capability

AbstractA design is described for a variable-temperature diffractometer specimen mount developed internally in the Physics Laboratory of Materials Central. Temperature capability of 1600°C is achieved using Indirect radiation heating. Higher temperatures may be obtained by directly heating the sample. An adaptation allows operation at temperatures as low as −196°C and is useful for studying low-temperature phase changes and examining materials normally liquid at room temperature. The mount operates in vacuum or inert atmosphere. A full 180° 2θ scanning range is possible through the use of curved beryllium- or aluminum-foil windows. Realignment of the sample at temperature and under vacuum may be accomplished from four points around the front plate of the mount. Only two vacuum seals are used In this mount in addition to the window seal and thermocouple seals. Power for the mount is high current, low voltage, and is controlled by an automatic temperature regulator and sensing device which maintains an accurate preset temperature.Applications of variable temperature techniques on refractory metals, alloys, and compounds are shown, along with an example of low-temperature effects in materials normally liquid at room temperature.

scholarly journals Transport current and magnetization of Bi-2212 wires above liquid Helium temperature for cryogen-free applications

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
A. Leveratto ◽  
A. Angrisani Armenio ◽  
A. Traverso ◽  
G. De Marzi ◽  
G. Celentano ◽  
...  
Keyword(s):  
Liquid Helium ◽  
Electrical Transport ◽  
High Field ◽  
Reference Data ◽  
Variable Temperature ◽  
High Temperature Superconductors ◽  
Field Application ◽  
Irreversibility Field ◽  
Original Approach ◽  
Very High

AbstractSince the discovery of high temperature superconductors, a possible cryogen-free scenario has always been wished. Nowadays, liquid Helium is running out, and it is likely that the cooling by will be a large part of the costs of any superconducting system. Bi-2212 wires at temperature higher than 4.2 K still show a very high irreversibility field and thus a deep investigation of their properties in such a range of temperature is very useful in order to assess the applicability in high field cryogen-free magnets. Here electrical transport and magnetic properties characterization at variable temperature and magnetic field on our “GDG—processed” wires are reported together with a well-described original approach to calculate the irreversibility field Hirr. This study is devoted to provide reference data on the behaviour of the only isotropic wire for high field application with an eye to the performances at temperatures above 4.2 K.

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