Thermal Conductance of Thick-Membrane TES Microcalorimeters for Several-MeV Gamma Rays

Tetsuya Tsuruta, Yukino Hamamura, Naoko Iyomoto, Yunosuke Nakamura, Shotaro Kawaguchi, Tasuku Hayashi, Yuta Yagi, Noriko Yamasaki, Kazuhisa Mitsuda

Research output: Contribution to journalArticlepeer-review

Abstract

We developed transition-edge sensor (TES) microcalorimeters to measure gamma rays with up to a few megaelectron volts. Our TES devices have a thick silicon membrane that supports a large absorber. We fabricated devices with different sizes of the TES and membranes to study the thermal conductance of the membrane. We found that the thermal conductance G of the membrane is less dependent on the distance between the TES and heat bath because heat is mainly transported by ballistic phonons in the thick membrane. In addition, gamma-ray irradiation experiments were conducted using a TES device with a large bismuth absorber (1 mm × 1 mm × 1 mm) and a thick membrane (6 μm); the energy response of the device was found to be largely linear.

Original languageEnglish
JournalJournal of Low Temperature Physics
DOIs
Publication statusAccepted/In press - 2022

All Science Journal Classification (ASJC) codes

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

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