A5093063159- Superconducting and THz Device Technology
- Physics of Superconductivity and Magnetism
- Scientific Research and Discoveries
- Magnetic Field Sensors Techniques
- Advanced Thermoelectric Materials and Devices
- Superconductivity in MgB2 and Alloys
Karlsruhe Institute of Technology
2023-2024
We present two variants of a magnetic microcalorimeter with paramagnetic temperature sensors and integrated dc-superconducting quantum interference device readout for high-resolution x-ray emission spectroscopy. Each variant employs overhanging gold absorbers sensitive area 150 × μm2 thickness 3 μm, thus providing related efficiency >98% photons up to 5 keV >50% 10 keV. The first operated nominally but suffered from Joule power dissipation the Josephson junction shunt...
Ultrasensitive cryogenic calorimeters have become a favored technology with widespread application where eV-scale energy resolutions are needed. In this article, we characterize the performance of an x-ray magnetic microcalorimeter (MMC) using <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mmultiscripts><a:mrow><a:mi>Fe</a:mi></a:mrow><a:mprescripts/><a:none/><a:mrow><a:mn>55</a:mn></a:mrow></a:mmultiscripts></a:mrow></a:math> source. Employing optimum...
Ultra-sensitive cryogenic calorimeters have become a favored technology with widespread application where eV-scale energy resolutions are needed. In this article, we characterize the performance of an X-ray magnetic microcalorimeter (MMC) using Fe-55 source. Employing optimum filter-based amplitude estimation and reconstruction, demonstrate that unprecedented FWHM resolution $\Delta E_\mathrm{FWHM} =...
We present two variants of a magnetic microcalorimeter with paramagnetic temperature sensors and integrated dc-SQUID readout for high-resolution X-ray emission spectroscopy. Each variant employs overhanging gold absorbers sensitive area 150$\mu$m x thickness 3$\mu$m, thus providing quantum efficiency 98% photons up to 5keV 50% 10keV. The first turned out be fully operational, but, at the same time, suffer from Joule power dissipation Josephson junction shunt resistors, athermal phonon loss,...