发明名称 |
PERMANENT MAGNET FOR PARTICLE BEAM ACCELERATOR AND MAGNETIC FIELD GENERATOR |
摘要 |
A permanent magnet for a particle accelerator and a magnetic field generator, in which Nd-Fe-B based magnets are used but are not demagnetized so easily even when exposed to a radiation, are provided. A permanent magnet for a particle accelerator is used in an environment in which the magnet is exposed to a radiation at an absorbed dose of at least 3,000 Gy. The magnet includes R (which is at least one of the rare-earth elements), B, TM (which is at least one transition element and includes Fe) and inevitably contained impurity elements. The magnet is a sintered magnet that has been magnetized to a permeance coefficient of 0.5 or more and that has a coercivity HcJ of 1.6 MA/m or more. <IMAGE> |
申请公布号 |
EP1603142(A4) |
申请公布日期 |
2009.08.05 |
申请号 |
EP20040713244 |
申请日期 |
2004.02.20 |
申请人 |
HITACHI METALS, LTD.;INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION |
发明人 |
MAKITA, K.;SUGIYAMA, EIJI;AOKI, MASAAKI;MURAKAMI, KAICHI;KAWAKUBO, T.;NAKAMURA, E. |
分类号 |
H01F1/057;H01F7/02;H05H7/04;(IPC1-7):H01F1/04;H05H13/04 |
主分类号 |
H01F1/057 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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