Effects of fluxoid trapping on signal creation in superconducting tunnel junction X-ray detectors

M. Ohkubo*, K. Tanabe, K. Suzuki, H. Pressler, M. Ukibe, Naoto Kobayashi, T. Nakamura, M. Kishimoto, M. Katagiri, D. Fukuda, H. Takahashi, M. Nakazawa

*この研究の対応する著者

研究成果: Article査読

4 被引用数 (Scopus)

抄録

Trapping of fluxoid quanta influences the performance of tunnel junction X-ray detectors. It has been found that the trapped vortices corresponding to a terrestrial magnetic field are enough for charge output and quasiparticle losstime to decrease by factors of two and three, respectively. This result leads to an effective vortex radius of Reff = 3ξ, which is in a good agreement with a Golubov's calculation. Magnetic images by a scanning SQUID microscope show that the trapping takes place at junction edges or inside the junction at random. The random trapping may cause an instability of the detector performance. On average, the cooling in a perpendicular magnetic field results in the trapping of the corresponding vortex density, that is B/Φ0.

本文言語English
ページ(範囲)237-240
ページ数4
ジャーナルNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
444
1
DOI
出版ステータスPublished - 2000 4月 7
外部発表はい

ASJC Scopus subject areas

  • 器械工学
  • 核物理学および高エネルギー物理学

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