Development of TES Microcalorimeters with Solar-Axion Converter

R. Konno*, K. Maehisa, K. Mitsuda, N. Y. Yamasaki, R. Yamamoto, T. Hayashi, H. Muramatsu, Y. Nakashima, K. Maehata, T. Homma, M. Saito, M. Sugie, R. Sato

*この研究の対応する著者

研究成果: Article査読

抄録

Several issues in developing transition edge sensor (TES) microcalorimeters for the search of monochromatic solar axions expected at 14.4 keV are studied. The potential problem of developing TES’s of this purpose is in that an axion absorber of 57Fe must be placed in close vicinity of a TES. We estimated the minimum distance to avoid magnetic interference from iron using magnetic FEM simulations, and found it 30 μ m for an iron of 5 μ m thickness. We fabricated a TES with a 10 μ m thick iron membrane separated by 60 μ m. We confirmed the superconducting transition for this TES. However, both the residual normal resistance and the transition temperature was different from those of TES without iron. We also estimated the low-temperature thermal conductivity of an iron membrane by measuring the low-temperature electrical resistance and by applying the Wiedemann–Franz law. We estimated the pulse-shape dependency on the interaction position within the 57Fe converted using thermal FEM simulations. We found that the pulse-shape variations will limit the energy resolution to about 30 eV FWHM.

本文言語English
ページ(範囲)654-662
ページ数9
ジャーナルJournal of Low Temperature Physics
199
3-4
DOI
出版ステータスPublished - 2020 5 1

ASJC Scopus subject areas

  • 原子分子物理学および光学
  • 材料科学(全般)
  • 凝縮系物理学

フィンガープリント

「Development of TES Microcalorimeters with Solar-Axion Converter」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル