发明申请
US20120168619A1 METHODS AND SYSTEMS FOR PROVIDING A SUBSTANTIALLY QUADRUPOLE FIELD WITH A HIGHER ORDER COMPONENT 有权
用于提供具有较高订单组件的大规模四足场的方法和系统

  • 专利标题: METHODS AND SYSTEMS FOR PROVIDING A SUBSTANTIALLY QUADRUPOLE FIELD WITH A HIGHER ORDER COMPONENT
  • 专利标题(中): 用于提供具有较高订单组件的大规模四足场的方法和系统
  • 申请号: US13416352
    申请日: 2012-03-09
  • 公开(公告)号: US20120168619A1
    公开(公告)日: 2012-07-05
  • 发明人: Mircea Guna
  • 申请人: Mircea Guna
  • 申请人地址: SG Singapore
  • 专利权人: DH TECHNOLOGIES PTE. LTD.
  • 当前专利权人: DH TECHNOLOGIES PTE. LTD.
  • 当前专利权人地址: SG Singapore
  • 主分类号: H01J49/26
  • IPC分类号: H01J49/26
METHODS AND SYSTEMS FOR PROVIDING A SUBSTANTIALLY QUADRUPOLE FIELD WITH A HIGHER ORDER COMPONENT
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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