6533b873fe1ef96bd12d57ff

RESEARCH PRODUCT

Sub-kelvin current amplifier using DC-SQUID

Antti NuottajärviJukka P. PekolaSami PöyhönenIlkka SuniK. M. KinnunenJorma SalmiHeikki SipiläMikko KivirantaArttu LuukanenHeikki Seppä

subject

PhysicsSuperconductivityCurrent-feedback operational amplifierbusiness.industryPhysics::Instrumentation and DetectorsAmplifierPhysics::Medical PhysicsSTRIPSCondensed Matter PhysicsElectronic Optical and Magnetic Materialslaw.inventionNuclear magnetic resonancelawThermometerCondensed Matter::SuperconductivityOptoelectronicsElectronicsDilution refrigeratorElectrical and Electronic EngineeringbusinessActive noise control

description

Abstract We have set up a system where a low-noise DC-SQUID is used as a current amplifier. The SQUID output is read using a wide band electronics unit based on the noise cancellation scheme. The SQUID has been installed in a compact Nanoway PDR50 dilution refrigerator, and superconducting transitions of Ti/Au thermometer strips for X-ray calorimeter applications have been measured. We can operate at 100 mK using a SQUID with Pd shunt resistors. Noise and bandwidth results of the setup are presented.

yearjournalcountryeditionlanguage
2000-07-01Physica B: Condensed Matter
10.1016/s0921-4526(99)03018-5https://doi.org/10.1016/S0921-4526(99)03018-5