0000000000793593

AUTHOR

Heikki Sipilä

showing 2 related works from this author

Transition-edge microcalorimeters for X-ray space applications

2000

Abstract In an European Space Agency funded research project, our goal is to develop microbolometer technology for X-ray and far-infrared detection for ESA's future scientific missions. We report results on the X-ray calorimeter, which is based on the superconducting transition of the Ti/Au thermometer strip at about 200 mK. Incident X-rays heat up a Bi absorber, deposited on top of the 400 μm ×400 μm thermometer. The temperature rise of the absorber is measured as a change of the thermometer current with a SQUID operating at 1 K.

PhysicsSuperconductivitybusiness.industryBolometerX-rayMicrobolometerCondensed Matter PhysicsSpace (mathematics)Electronic Optical and Magnetic MaterialsCalorimeterlaw.inventionSQUIDOpticslawThermometerOptoelectronicsElectrical and Electronic EngineeringbusinessPhysica B: Condensed Matter
researchProduct

Sub-kelvin current amplifier using DC-SQUID

2000

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.

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 controlPhysica B: Condensed Matter
researchProduct