Compact Miniature High-Resolution Thermometer

Author

Narayana, Supradeep ; Sato, Yuki

Author_Institution

Rowland Inst. at Harvard, Harvard Univ., Cambridge, MA, USA

Volume

20

Issue

6

fYear

2010

Firstpage

2402

Lastpage

2405

Abstract

We report a compact miniature high-resolution thermometer (CMHRT) based on dilute paramagnetic alloy of PdMn and commercially available Neodymium (NdFeB) magnets. The thermometer utilizes the temperature dependence of magnetic susceptibility of the alloy in an applied magnetic field. The change in susceptibility is measured with a pickup coil connected to a dc-SQUID. Based on this approach, we have developed a self-contained thermometer with sub-nanoKelvin sensitivity with the operating temperature range of 1.6-4 K. Its design, assembly, and performance are described.

Keywords

boron alloys; dilute alloys; iron alloys; magnetic susceptibility; manganese alloys; neodymium alloys; palladium alloys; paramagnetic materials; thermometers; NdFeB; Neodymium magnets; PdMn; dilute paramagnetic alloy; high-resolution thermometer; magnetic field; magnetic susceptibility; sub-nanoKelvin sensitivity; temperature 1.6 K to 4 K; Magnetic field measurement; Magnetic susceptibility; SQUID magnetometers; SQUIDs; Superconducting magnets; Temperature measurement; Thermal noise; Johnson noise; SQUID magnetometer; SQUIDs; magnetic field measurement; magnetic fluctuations; magnetic susceptibiilty; superconducting device; temperature measurement; thermal noise;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2010.2087021

Filename

5623301