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290 results on '"Takada, Susumu"'

121. Properties of Large-Sized Nb-Based Superconducting TunnelJunctions for X-Ray Detection

Author

Takeno, Kazuhiko, primary, Ishibashi, Kenji, additional, Mori, Ken-ichi, additional, Nagae, Toshimitsu, additional, Matsumoto, Yuzuru, additional, Katase, Akira, additional, Kinoshita, Chiken, additional, Nakai, Kiyomichi, additional, Takada, Susumu, additional, Nakagawa, Hiroshi, additional, Akoh, Hiroshi, additional, Aoyagi, Masahiro, additional, and Kohjiro, Satoshi, additional

Published
1991
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124. Basic characteristics of new interior permanent magnet linear pulse motor.

Author

Wakiwaka, Hiroyuki, Misron, Norhisam, Kamiya, Akinori, Yajima, Hisashi, Tamura, Kazuya, Fujiwara, Nobuhiro, Hosono, Masayuki, and Takada, Susumu

Subjects
LINEAR electric motors, AUTOMATION, MAGNETIC devices
Abstract

In recent years, linear motors are gaining wide popularity in the field of office and factory automation. Therefore, small and high thrust linear motors are needed. This paper deals with a proposal of a new interior permanent magnet type linear pulse motor and it's characteristics. The thrust density of the interior permanent magnet linear pulse motor is larger compared to the other type linear pulse motors. [ABSTRACT FROM AUTHOR]

Published
2001

127. The Effect of X-Ray Irradiating Superconducting Tunnel Junctions on Al2 O3 and LiNbO3 Substrates.

Author

Taino, Tohru, Hoshino, Kouichi, Nakano, Ran, Otani, Chiko, Myoren, Hiroaki, Kawase, Kodo, Sato, Hiromi, Shimizu, Hirohiko M., and Takada, Susumu

Subjects
IRRADIATION, RADIATION, DETECTORS, SPECTRUM analysis, ENGINEERING instruments, SEMICONDUCTOR junctions
Abstract

We have developed a Phononmediated radiation detector using Nb-based superconducting tunnel junctions (STJs). The STJs are fabricated on a substrate as an absorber of the radiation, and a substantial amount of emergent phonons with an energy above the energy gap are detected. The performance of the detector depends on the collection efficiency of the phonon. A selection of an appropriate substrate is required for optimizing the detector performance. We fabricated Nb-bass STJs on a Al2O3 and a LiNbO3 substrates, and compared the pulse heights of substrate phonon events due to X-ray irradiation to the substrates. We found that the maximum pulse height of the phonon events for the LiNbO3 substrate was about twice of that for the Al2 O3 substrate, so that these spectra which was obtained from two STJs showed different shapes, especially the peak due to phonon events. [ABSTRACT FROM AUTHOR]

Published
2005
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128. Nb-Based Superconducting Tunnel Junctions With β-Ta Trapping Layers for Photon Detectors.

Author

Myoren, Hiroaki, Kogure, Yuki, Takada, Susumu, Sato, Hiromi, Otani, Chiko, Shimizu, Hirohiko M., and Maehata, Keisuke

Subjects
PHOTON detectors, SUPERCONDUCTORS, QUANTUM tunneling, TANTALUM
Abstract

We have successfully fabricated Nb-based superconducting tunnel junctions (STJs) with β-Ta trapping layers. In an Nb/ β-Ta stacked structure, β-Ta film showed the thickness dependence of critical temperature T[sub c] in current-voltage (I-V) characteristics due to the proximity effect from Nb films. We fabricated Nb-based STJs with Β-Ta trapping layers for X-ray detector working at 0.4 K. We obtained an energy resolution of 52 eV for 5.9 kev X-ray irradiation at 0.4 K. We expect a high energy resolution by optimizing the thickness of Β-Ta trapping layers and improving the fabrication process. [ABSTRACT FROM AUTHOR]

Published
2003

129. Switch using d-wave symmetry of YBa[sub 2]Cu[sub 3]O[sub 7-δ] Josephson junction.

Author

Enomoto, Youichi, Nishihara, Tomohiro, Myouren, Hiroaki, and Takada, Susumu

Subjects
SWITCHING theory, SEMICONDUCTORS, JOSEPHSON junctions
Abstract

Switching functions using a parallel connection of conventional-type and πtype junctions have been investigated. Both junctions consist of Nb/Au/YBa[sub 2]Cu[sub 3]O[sub 7]-δ Josephson junctions on YBa[sub 2]Cu[sub 3]O[sub 7]-δ edges, whose faces are (110) and (100). The modulation patterns of critical currents in low magnetic fields indicate that the d-wave component is dominant: the (100) junctions exhibit the conventional type, but the (110) junctions the π type. Superconducting current path is alternated between the conventional junction and the π junction by applied magnetic fields using these anisotropic magnetic field dependences of the critical current. [ABSTRACT FROM AUTHOR]

Published
2002
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