Title :
Compact Miniature High-Resolution Thermometer
Author :
Narayana, Supradeep ; Sato, Yuki
Author_Institution :
Rowland Inst. at Harvard, Harvard Univ., Cambridge, MA, USA
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2010.2087021
