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RESEARCH PRODUCT
Spectral broadening by quasiparticle pile-up in X-ray microcalorimeters with superconducting absorbers
Marco BarberaEric H. SilverEmanuele PerinatiSalvatore SerioSalvatore Seriosubject
PhysicsSuperconductivityNuclear and High Energy PhysicsPhotonCondensed matter physicsPhysics::Instrumentation and DetectorsDetectorX-raychemistry.chemical_elementGermaniummicrocalorimeterHeat capacitychemistryX-ray spectroscopyQuasiparticlesuperconducting absorbersAtomic physicsInstrumentationDoppler broadeningdescription
Long-living quasiparticles can pile-up in a superconducting absorber of an X-ray microcalorimeter when photons are detected at high count rate. These quasiparticles can give a non-negligible contribution to the total heat capacity of the detector thus affecting the pulse height spectrum of detected photons. We investigated this effect with numerical simulations and evaluated the resulting spectral broadening as a function of the photon absorption rate, and the heat capacity of the detector for a NTD germanium microcalorimeter with pure Sn absorber.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-03-01 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |