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Thermalization efficiency of superconducting absorbers for thermal X-ray microcalorimeters
The persistence of long living quasiparticles created in the energy thermalization process can affect the performances of a thermal X-ray microcalorimeter with superconducting absorber. Numerical simulations indicate that in an absorber made of high-purity Sn, operated at temperatures lower than 100...
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Published in: | Physica. C, Superconductivity Superconductivity, 2004-08, Vol.408, p.820-821 |
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container_title | Physica. C, Superconductivity |
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creator | Perinati, E. Barbera, M. Serio, S. Silver, E. |
description | The persistence of long living quasiparticles created in the energy thermalization process can affect the performances of a thermal X-ray microcalorimeter with superconducting absorber. Numerical simulations indicate that in an absorber made of high-purity Sn, operated at temperatures lower than 100 mK, up to 60% of the deposited energy can remain trapped in the quasiparticle system for a time much longer than the time scale of the thermal sensor response, producing a reduction of the SNR of the detector. Other pure superconductors can present the same problem and therefore a microscopic analysis of the physical properties can be useful to identify suitable absorbing materials and optimize the detector performances. |
doi_str_mv | 10.1016/j.physc.2004.03.145 |
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subjects | Microcalorimeters Phonons Quasiparticles Superconducting absorbers |
title | Thermalization efficiency of superconducting absorbers for thermal X-ray microcalorimeters |
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