发明名称 |
Quadrupole mass analyzer with linear ion trap |
摘要 |
The present invention describes a quadrupole mass analyzer with linear ion trap. The quadrupole mass analyzer functions in a dual-mode. A conventional transmission mode operates with external ionizer supplying ions to the quadrupole analyzer. In an ion trap mode, DC endcap electrodes are attached to the rf quadrupole cylinder to form a trapping chamber where ions are confined. The preferred mode is based on a segmented cylinder electrode geometry which produces a substantially quadrupolar field distribution as used in a conventional four-rod quadrupole mass analyzer. Electrodes are generated from a cylinder that has been segmented along its length into some number of electrically isolated electrodes.
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申请公布号 |
US6157031(A) |
申请公布日期 |
2000.12.05 |
申请号 |
US19980156099 |
申请日期 |
1998.09.17 |
申请人 |
CALIFORNIA INSTITUTE OF TECHNOLOGY |
发明人 |
PRESTAGE, JOHN D. |
分类号 |
H01J49/42;(IPC1-7):H01J49/42 |
主分类号 |
H01J49/42 |
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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