Transition Edge Sensors for DC Operation and Low Magnetic Field Sensitivity

M. de Wit,L. Gottardi,K. Nagayoshi,E. Taralli,D. Vaccaro,K. Ravensberg,M. P. Bruijn,J. van der Kuur,J. R. Gao,J. W. A. den Herder

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY（2025）

SRON Netherlands Inst Space Res

Cited 0|Views3

Abstract

The X-ray Integral Field Unit (X-IFU) is an imaging spectrometer based on a large array of Transition Edge Sensors (TES) measured using Time Domain Multiplexing (TDM). For the development of a backup detector array, we have designed and realized a cryogenic test setup capable of measuring 9 detectors in a single cooldown under DC bias. We have used this setup to study a small selection of low aspect ratio TES designs, intended to have a low normal resistance suitable for TDM readout. In this work we show how the different designs are affected by magnetic fields. We do this by presenting the impact on the transition shape, detector integrated Noise Equivalent Power (NEP), and sensitivity of the energy scale calibration. We find, in agreement with previous studies, that reducing the width of the TES bilayer greatly improves the detector resilience to magnetic fields, potentially by several orders of magnitude.

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Key words

Detectors,Magnetic fields,Magnetic field measurement,Time division multiplexing,Resistance,Sensitivity,Temperature sensors,Photonics,Sensor arrays,Semiconductor device measurement,Superconducting photodetectors,X-ray detectors,superconducting device noise

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【要点】：本研究设计了一种适用于直流操作和低磁场敏感性的过渡边沿传感器（TES），并通过实验验证了不同TES设计在磁场影响下的性能表现，发现减小TES双层的宽度能显著提高传感器对磁场的抗干扰能力。

【方法】：通过构建一个能够在单次冷却过程中测量9个检测器的低温测试平台，并使用时间域复用（TDM）技术进行TES的测量。

【实验】：在实验中，使用该测试平台研究了低纵横比TES设计，并在磁场影响下测试了TES的过渡形状、探测器积分噪声等效功率（NEP）以及能量标度校准的敏感性。实验使用了专门设计的TES检测器阵列，并得到了磁场对不同TES设计影响的数据。