Development of superconducting tunnel junctions for ultra soft X-ray detectors

Author

Takizawa, Yoshiyuki ; Ikeda, Tokihiro ; Oku, Takayuki ; Otani, Chiko ; Kawai, Kazuhiko ; Sato, Hiromi ; Shimizu, Hirohiko M. ; Miyasaka, Hiromasa ; Watanabe, Hiroshi ; Ootani, Wataru ; Akou, Hiroshi ; Nakagawa, Hiroshi ; Aoyagi, Masahiro ; Taino, Tohru

Author_Institution

RIKEN, Inst. of Phys. & Chem. Res., Saitama, Japan

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

721

Lastpage

723

Abstract

Nb-based superconducting tunnel junctions (STJs) with Al trapping layers have been developed for X-ray detectors. One applications for STJs is a low energy radiation detector having energy resolution and a high photon counting rate. STJs have good potential in the band of energies from 40 eV up to 1 keV, because STJs materials have good absorbing properties in this region. The energy resolution was measured by using the Photon Factory beamline BL-12A of High Energy Accelerator Research Organization (KEK) in Japan, and for 200 eV photon, 11 eV Full Width Half at Half Maximum (FWHM) with a 20×20 μm² junction were achieved. In this article, the fabrication technique and preliminary results of measuring the response for this band of energies are reported

Keywords

X-ray detection; niobium; photon counting; superconducting junction devices; superconducting particle detectors; superconductive tunnelling; 40 eV to 1 keV; Al; Al trapping layer; Nb; Nb superconducting tunnel junction; energy resolution; fabrication; photon counting; ultra soft X-ray detector; Artificial intelligence; Energy resolution; Extraterrestrial measurements; Fabrication; Josephson junctions; Niobium; Radiation detectors; Superconducting photodetectors; Ultraviolet sources; X-ray detectors;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919446

Filename

919446