0000000000985377

AUTHOR

Don A. Landis

showing 2 related works from this author

NTD-GE-based microcalorimeter performance

2000

Our group has been developing x-ray microcalorimeters consisting of neutron transmutation doped (NTD) germanium thermistors attached to superconducting tin absorbers. We discuss the performance of single pixel x-ray detectors, and describe an array technology. In this paper we describe the read-out circuit that allows us to measure fast signals in our detectors as this will be important in understanding the primary cause of resolution broadening. We describe briefly a multiplexing scheme that allows a number of different calorimeters to be read out using a single JFET. We list the possible causes of broadening and give a description of the experiment which best demonstrates the cause of the…

PhysicsNuclear and High Energy PhysicsNuclear transmutationPhysics::Instrumentation and Detectorsbusiness.industryDetectorX-ray detectorchemistry.chemical_elementJFETGermaniumMultiplexingElectromagnetic interferenceSettore FIS/05 - Astronomia E AstrofisicaOpticschemistryOptoelectronicsNeutronbusinessInstrumentationNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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Modeling the energy thermalization of X-ray photons in a microcalorimeter with superconducting absorber

2003

We present a modeling of the response of a microcalorimeter to the absorption of X-ray photons, based on the main microscopical processes responsible for the energy thermalization. In particular, we have modeled a microcalorimeter with superconducting tin absorber (350 micron x 350 micron x 7 micron) and neutron transmutation doped (NTD) germanium thermistor (75 micron x 50 micron x 150 micron). Such a detector, operated at 60 mK, is expected to achieve a spectral resolution as good as 1 eV FWHM in the soft X-ray energy range, based on the known sources of thermal and electronic noise. Nevertheless, the best spectral resolution measured in laboratory experimental tests is of about 5 eV FWHM…

PhysicsRange (particle radiation)PhotonPhysics::Instrumentation and DetectorsPhononbusiness.industrychemistry.chemical_elementGermaniumThermalizationCondensed Matter PhysicsOpticsThermalisationchemistryMicrocalorimeterX-ray spectroscopyNeutronAtomic physicsSpectral resolutionElectrical and Electronic EngineeringbusinessAbsorption (electromagnetic radiation)
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