Abstract
In this letter, we present the performance of a 100 μm × 400 μm × 40 nm W Transition-Edge Sensor with a critical temperature of 40 mK. This device has a noise equivalent power of 1.5×10-18 W/Hz, in a bandwidth of 2.6 kHz, indicating a resolution for Dirac delta energy depositions of 40 ± 5 meV (rms). The performance demonstrated by this device is a critical step toward developing a O(100) meV threshold athermal phonon detector for low-mass dark matter searches.
Highlights
The energy resolution of a calorimeter can be estimated with an optimum filter (OF)12,13 from σE2
We present the performance This device has a noise equivalent power of of a 100 1.5 ×
The performance demonstrated by this device is a critical step toward developing a O(100) meV threshold athermal phonon detector for low-mass dark matter searches
Summary
The energy resolution of a calorimeter can be estimated with an optimum filter (OF)12,13 from σE2.
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