Invention Grant
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
- Patent Title: Methods and systems for providing a substantially quadrupole field with a higher order component
- Patent Title (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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Application No.: US12830384Application Date: 2010-07-05
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Publication No.: US08168944B2Publication Date: 2012-05-01
- Inventor: Mircea Guna
- Applicant: Mircea Guna
- Applicant Address: SG Singapore
- Assignee: DH Technologies Development Pte. Ltd.
- Current Assignee: DH Technologies Development Pte. Ltd.
- Current Assignee Address: SG Singapore
- Agency: Nutter McClennen & Fish LLP
- Main IPC: H01J49/42
- IPC: H01J49/42 ; H01J49/26
Abstract:
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.
Public/Granted literature
- US20110155902A1 METHODS AND SYSTEMS FOR PROVIDING A SUBSTANTIALLY QUADRUPOLE FIELD WITH A HIGHER ORDER COMPONENT Public/Granted day:2011-06-30
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