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Measurement of quasiparticle transport in aluminum films using tungsten transition-edge sensors
2014
Applied Physics Letters
We report new experimental studies to understand the physics of phonon sensors which utilize quasiparticle diffusion in thin aluminum films into tungsten transition-edge-sensors (TESs) operated at 35 mK. We show that basic TES physics and a simple physical model of the overlap region between the W and Al films in our devices enables us to accurately reproduce the experimentally observed pulse shapes from x-rays absorbed in the Al films. We further estimate quasiparticle loss in Al films using a simple diffusion equation approach.
doi:10.1063/1.4899130
fatcat:kbkjaoy4t5cuzmegrjb46ztalm