发明名称 |
Ion excitation in a linear ion trap with a substantially quadrupole field having an added hexapole or higher order field |
摘要 |
A two-dimensional substantially quadrupole field is established and maintained to trap a selected group of ions. The field has a quadrupole harmonic with amplitude A<SUB>2</SUB>, and a higher order harmonic with an amplitude A<SUB>N</SUB>, A<SUB>N </SUB>being greater than 0.1%. The selected group of ions are trapped in the field. An oscillation frequency at a selected amplitude of excitation for the selected group of ions is determined. An excitation field at the selected amplitude of excitation is added to the two-dimensional substantially quadrupole field to deplete ions within a depletion peak having a low frequency side slightly above the oscillation frequency at the selected amplitude of excitation for the selected group of ions.
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申请公布号 |
US2006118716(A1) |
申请公布日期 |
2006.06.08 |
申请号 |
US20050269165 |
申请日期 |
2005.11.08 |
申请人 |
THE UNIVERSITY OF BRITISH COLUMBIA |
发明人 |
MICHAUD ANTHONY L.;FRANK AARON J.;DOUGLAS DONALD J.;ZHAO XIANZHEN |
分类号 |
H01J49/00 |
主分类号 |
H01J49/00 |
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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