Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 39: Focus Session: Frontiers in Cryogenic Particle Detection

TT 39.5: Hauptvortrag

Mittwoch, 18. März 2020, 17:15–17:45, HSZ 03

Large Array of Superconducting Transition-Edge Sensors for High Sensitive Photon and Particle Detectors — •Luciano Gottardi — SRON - Netherlands Institute for Space Research, Utrecht , The Netherlands

Superconducting Transition-Edge Sensors (TES) have proven to achieve very high sensitivity in detecting small temperature changes. TES-based detectors are employed in many low temperature imaging instruments in the field of gamma-ray spectroscopy, X-ray and infrared astrophysics, CMB-polarization experiments and optical instrumentation. We will present the cutting-edge technology of the X-ray Integral Field Unit on board of the future ESA Advanced Telescope for High-Energy Astrophysics (Athena). The detector baseline consists of 3200 micro-calorimeters based on superconducting MoAu transition-edge sensors (TES's) from NASA-Goddard read out in the MHz bandwidth using Frequency Division Multiplexing (FDM), based on Superconducting QUantum Interference Devices (SQUIDs) from SRON/VTT. The proposed design calls for devices with high quantum efficiency and a breakthrough energy resolution of 2.5 eV at 5.9 keV. The focus of this paper will be on our recent efforts in the optimization of the NASA/Goddard MoAu and the SRON TiAu TES pixel design to improve on the superconducting transition uniformity, the noise, and to minimize non-linearity effects. This technology is potentially interesting as well for the development of high resolution X-ray cameras for monitoring the quality of the plasma in nuclear fusion reactors or for the search of axions-like particles.