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High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
Published on: April 16, 2017
X-ray microcalorimeter based on superconducting transition edge sensors
Masashi Ohno1, Hiroyuki Takahashi, R M Thushara Damayanthi
1Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency,5 Sanbancho, Chiyoda, Tokyo 102-0075, Japan . ohno@n.t.u-tokyo.ac.jp
Summary
Researchers developed a superconducting transition edge sensor (TES) X-ray imaging spectrometer. This advanced TES technology offers high energy resolution and precise spatial localization for X-ray detection.
Area of Science:
- Physics
- Materials Science
- Astrophysics
Background:
- Superconducting Transition Edge Sensors (TES) are crucial for high-resolution X-ray detection.
- Existing TES devices face challenges in achieving large pixel arrays, high absorption efficiency, and high count rates simultaneously.
- Developing advanced X-ray imaging spectrometers is essential for various scientific applications, including astrophysics and materials analysis.
Purpose of the Study:
- To realize an X-ray imaging spectrometer utilizing superconducting transition edge sensors (TES).
- To achieve high energy resolution, large pixel arrays, high absorption efficiency, and high count rates.
- To demonstrate a pixellated array of Ir/Au TES with precise pixel identification and spatial resolution.
Main Methods:
- Fabrication and characterization of single-pixel Indium-gold (Ir/Au) TES.
- Development of a pixellated array of Ir-TES with modified bias points for individual pixel identification.
- Parallel biasing of the 10-pixel device and evaluation of its energy and position resolution.
- Operation and testing of a 20-pixel device.
- Investigation of novel TES geometries to enhance count rate and absorption efficiency.
Main Results:
- A single Ir/Au TES pixel achieved an energy resolution of 9.4 eV for 5.9 keV X-rays.
- A 10-pixel parallel-biased Ir-TES array demonstrated 13 eV (FWHM) energy resolution at 3 keV and 80 micrometer position resolution.
- Successful operation of a 20-pixel device has been achieved.
- Ongoing development of a new TES geometry with a self-adjusting radiation absorber aims to improve count rate and absorption efficiency.
Conclusions:
- The developed Ir/Au TES technology shows significant promise for high-performance X-ray imaging spectroscopy.
- The pixellated array approach enables precise spatial localization and high energy resolution.
- Further optimization of TES geometry is underway to enhance key performance metrics for future applications.
