Study of Multilayer X-ray Absorbers to Improve Detection Efficiency of TES X-ray Microcalorimeter Arrays

T. Hayashi, K. Nagayoshi, H. Muramatsu, N. Y. Yamasaki, K. Mitsuda, M. Saito, T. Homma, T. Hara, H. Noda

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We report the fabrication and evaluation of the Cu/Bi bilayer absorber with electrodeposition. We designed the Cu/Bi absorber to satisfy the requirements for scanning transmission electron microscope (STEM). The residual resistivity ratios of films of Cu and Bi with electrodeposition was 5.91 ± 0.49 and 2.06 ± 0.33 , respectively; these values are sufficient for the requirements of STEM. We found that the Cu/Bi bilayer absorber TES microcalorimeter experienced a pulse-shape variation and we considered that these variations were caused by the quality of the contact surface between the absorber and TES. In addition, we examined the structure of the absorber using focus ion beam analysis and STEM. The results suggest that an oxidation between the Cu and seed layer, in which the layer is an electrode for electrodeposition, yielded variations. Moreover, thermal simulation suggests that the thermal conduction between the absorber and TES caused variations. The results of this study will improve the process of Bi electrodeposition.

Original languageEnglish
Pages (from-to)257-262
Number of pages6
JournalJournal of Low Temperature Physics
Volume184
Issue number1-2
DOIs
Publication statusPublished - 2016 Jul 1

Keywords

  • Bismuth
  • Multilayer absorber
  • TES
  • X-ray

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Study of Multilayer X-ray Absorbers to Improve Detection Efficiency of TES X-ray Microcalorimeter Arrays'. Together they form a unique fingerprint.

  • Cite this