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 H<SUB>cJ </SUB>of 1.6 MA/m or more.
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申请公布号 |
US2005258784(A1) |
申请公布日期 |
2005.11.24 |
申请号 |
US20050524314 |
申请日期 |
2005.02.09 |
申请人 |
INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION |
发明人 |
MAKITA KEN;SUGIYAMA EIJI;AOKI MASAAKI;MURAKAMI KAICHI;KAWAKUBO TADAMICHI;NAKAMURA EIJI |
分类号 |
H01F1/057;H01F7/02;H05H7/04;(IPC1-7):H05H13/00 |
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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