Weak-Link Phenomena in AC-Biased Transition Edge Sensors

Abstract

It has been recently demonstrated that superconducting transition edge sensors (TESs) behave as weak-links due to longitudinally induced superconductivity from the leads with higher Tc. In this work we study the implication of this behaviour for TES-based bolometers and microcalorimeter under ac bias. The TESs are read-out at frequencies between 1 and 5 MHz by a Frequency Domain Multiplexer based on a linearised two-stage SQUID amplifier and high- Q lithographically made superconducting LC resonators. In particular, we focus on SRON TiAu TES bolometers with a measured dark Noise Equivalent Power (NEP) of $3.2\cdot 10^{-19}W/H{z}^{1/2}$ developed for the short wavelength band for the instrument SAFARI on the SPICA telescope.

arXiv comment6 pages, 5 figure

References in corpus (6)

• Longitudinal Proximity Effects in Superconducting Transition-Edge Sensors
• Proximity Effects and Nonequilibrium Superconductivity in Transition-Edge Sensors
• Current distribution and transition width in superconducting transition-edge sensors
• Study of the dependency on magnetic field and bias voltage of an AC-biased TES microcalorimeter
• AC bias characterization of low noise bolometers for SAFARI using an Open-Loop Frequency Domain SQUID-based multiplexer operating between 1 and 5 MHz
• A multiplexer for the ac/dc characterization of TES based bolometers and microcalorimeters

Cited by in corpus (5)

• Josephson effects in an alternating current biased transition edge sensor
• Flux ramp modulation based MHz frequency-division dc-SQUID multiplexer
• Thermal crosstalk of X-ray transition-edge sensor micro-calorimeters under frequency domain multiplexing readout
• Multiplexed readout demonstration of a TES-based detector array in a resistance locked loop
• Demonstration of MHz frequency domain multiplexing readout of 37 transition edge sensors for high-resolution x-ray imaging spectrometers