发明授权
US08168944B2 Methods and systems for providing a substantially quadrupole field with a higher order component
有权
用于提供具有较高阶分量的基本上四极场的方法和系统
- 专利标题： Methods and systems for providing a substantially quadrupole field with a higher order component
- 专利标题（中）： 用于提供具有较高阶分量的基本上四极场的方法和系统
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申请号： US12830384申请日： 2010-07-05
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公开(公告)号： US08168944B2公开(公告)日： 2012-05-01
- 发明人: Mircea Guna
- 申请人： Mircea Guna
- 申请人地址： SG Singapore
- 专利权人： DH Technologies Development Pte. Ltd.
- 当前专利权人： DH Technologies Development Pte. Ltd.
- 当前专利权人地址： SG Singapore
- 代理机构： Nutter McClennen & Fish LLP
- 主分类号： H01J49/42
- IPC分类号： H01J49/42 ; H01J49/26
摘要：
A two-dimensional substantially quadrupole field is provided. The field comprises a quadrupole harmonic of amplitude A2 and an octopole harmonic of amplitude A4, wherein A4 is greater than 0.01% of A2, A4 is less than 5% of A2, and, for any other higher order harmonic with amplitude An present in the field, n being any integer greater than 2 except 4, A4 is greater than ten times An.
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