发明名称 |
Permanent magnet having improved field quality and apparatus employing the same |
摘要 |
A ring magnet assembly has a generally cylindrical magnet body defining an air gap having an upper end and a lower end. Upper and lower face plates dispose respectively at an upper portion of the ring magnet and lower portion of the ring magnet. The face plates preferably have a high magnetic permeability. A mass analyzer may be disposed within the air gap. An ion generator may be disposed within an air gap of a ring magnetic assembly of the present invention. A pair of vertically-stacked magnetic ring assemblies may be provided. In that embodiment, a mass analyzer may be disposed within one air gap and an ion generator within another.
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申请公布号 |
US8368496(B2) |
申请公布日期 |
2013.02.05 |
申请号 |
US20070005336 |
申请日期 |
2007.12.26 |
申请人 |
MONITOR INSTRUMENTS COMPANY, LLC;VOSS GUENTER F.;DURYEA ANTHONY N. |
发明人 |
VOSS GUENTER F.;DURYEA ANTHONY N. |
分类号 |
H01F7/02 |
主分类号 |
H01F7/02 |
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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