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3 results on '"T. Bizen"'

1. Idea of Mechanism and Protection of Radiation Damage on Undulator Permanent Magnet

Author

Yoshihiro Asano, T. Bizen, X. Marechal, and Hideo Kitamura

Subjects
Physics, Condensed matter physics, business.industry, Magnet, Demagnetizing field, Magnetization reversal, Radiation damage, Undulator, Radiation, Radiation protection, equipment and supplies, business, human activities
Abstract

Most of radiation damages in materials are structural changes (radiation‐induced defects), but the origins of radiation‐induced demagnetization of permanent magnets can be explained by a magnetization reversal caused by a thermal process. We propose a model for the mechanism of radiation‐induced demagnetization and suggest some protections strategies.

Published
2007
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2. Development of in-vacuum revolver undulator

Author

X. Marechal, T. Tanaka, Toru Hara, T. Bizen, Hideo Kitamura, and T. Seike

Subjects
Nuclear physics, Physics, Brightness, ComputingMilieux_THECOMPUTINGPROFESSION, law, ComputingMilieux_COMPUTERSANDSOCIETY, Particle accelerator, Development (differential geometry), Undulator, Rotation, Period length, GeneralLiterature_MISCELLANEOUS, law.invention
Abstract

In‐vacuum type revolver undulator has been developed. This device has four undulators with different period length. The exotic in‐vacuum technologies were used in this device.

Published
2004
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3. Introduction of the high radiation resistance of undulator magnet

Author

Hoseon Lee, T. Tanaka, T. Seike, Yoshihiro Asano, X. Marechal, D. E. Kim, T. Bizen, Chinwha Chung, Toru Hara, and Hideo Kitamura

Subjects
inorganic chemicals, Materials science, Condensed matter physics, Annealing (metallurgy), Demagnetizing field, Electron, Undulator, Coercivity, equipment and supplies, Magnetic field, Nuclear magnetic resonance, Magnet, Irradiation, human activities
Abstract

One of the neodymium‐iron‐boron (Nd2Fe14B) magnet with high coercivity was found to show very high resistance to irradiation. The sample was irradiated with 2.0 GeV electrons. The radiation‐induced demagnetization of this Nd2Fe14B magnet was as small as that of the samarium‐cobalt (Sm2Co17) magnets, known as to show high radiation resistance, irradiated under same experimental conditions for comparison.

Published
2004
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