发明名称 |
Method for injection of externally produced ions into a quadrupole ion trap |
摘要 |
A method of ion collection over a wide mass-to-charge range from continuous ion source into a quadrupole ion trap filled with a buffer gas directing an ion beam, from an external ion source to a radio frequency ion trap through a gating device for a predetermined period of accumulation time to allow the beam to enter the trap, trapping ions over a range of masses by applying a radio frequency voltage to the trap and changing an amplitude of the radio frequency voltage adiabatically to achieve a uniform trapping efficiency for ions over a predetermined mass range. The predetermined period of accumulation time may be divided into a plurality of segments, and the amplitude of the radio-frequency voltage is changing adiabatically within each segment.
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申请公布号 |
US5729014(A) |
申请公布日期 |
1998.03.17 |
申请号 |
US19960678742 |
申请日期 |
1996.07.11 |
申请人 |
VARIAN ASSOCIATES, INC. |
发明人 |
MORDEHAI, ALEX;BUTTRILL, JR., SIDNEY E. |
分类号 |
H01J49/26;H01J49/42;(IPC1-7):B01D59/44;H01J49/00 |
主分类号 |
H01J49/26 |
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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