Abstract
We are conducting the development of a transition edge sensor (TES) microcalorimeter system for energy-dispersive X-ray spectroscopy (EDS), performed using a scanning-transmission electron microscope (STEM). The operating temperature of the TES microcalorimeter was maintained using a compact dry \(^{3}\)He-\(^{4}\)He dilution refrigerator. This was pre-cooled by a remote helium cooling loop system and a Gifford-McMahon cooler. These conditions allowed for high-resolution STEM imaging to be achieved. A single-pixel TES microcalorimeter with a polycapillary optic was selected to demonstrate the analytical operation of the EDS system in the STEM. For a Ti-It-Pt sample, an X-ray energy resolution of 8.6 eV full-width at half maximum (FWHM) was obtained at Ir M\(_{\alpha 1}\), Pt M\(_{\alpha 1}\), and Ir M\(_{\beta }\). Using an electron device sample, element distribution maps of Si, Ti, and W were obtained using a Si K\(_{\alpha 1}\) X-ray energy resolution of 9.7 eV FWHM.
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This work was financially supported by SENTAN, Japan Science and Technology Agency (JST).
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Maehata, K., Hara, T., Mitsuda, K. et al. A Transition Edge Sensor Microcalorimeter System for the Energy Dispersive Spectroscopy Performed on a Scanning-Transmission Electron Microscope. J Low Temp Phys 184, 5–10 (2016). https://doi.org/10.1007/s10909-015-1361-3
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DOI: https://doi.org/10.1007/s10909-015-1361-3