发明名称 |
ION DETECTION |
摘要 |
A mass analyser in which ions form packets that oscillate with a period has an ion detector comprising: a detection arrangement; and compensation circuitry. The detection arrangement may comprise: a plurality of detection electrodes detecting image current signals from ions in the mass analyser; and a preamplifier, providing an output based on the image current signals. The compensation circuitry provides a compensation signal to a respective compensatory part of the detection arrangement, based on one or more of the image current signals. A capacitance between each of the compensatory parts of the detection arrangement and a signal-carrying part of the detection arrangement affects the signal-to-noise ratio of the preamplifier output. A generator may provide a trapping field defining an ion trapping volume and a shielding conductor may be positioned between two detection electrodes, with a controller applying a voltage to the shielding conductor based on a detected image current. |
申请公布号 |
US2016268118(A1) |
申请公布日期 |
2016.09.15 |
申请号 |
US201615161850 |
申请日期 |
2016.05.23 |
申请人 |
Thermo Fisher Scientific (Bremen) GmbH |
发明人 |
KHOLOMEEV Alexander;MAKAROV Alexander Alekseevich |
分类号 |
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 |
1. An electrostatic ion trapping device comprising:
a trapping field generator, configured to provide a trapping field defining an ion trapping volume, in which ions are confined; a detection arrangement, configured to detect an image current from ions trapped in the ion trapping volume, using a plurality of detection electrodes; a shielding conductor, positioned between a first detection electrode and a second detection electrode from the plurality of detection electrodes; and a controller, configured to apply a voltage to the shielding conductor based on an image current detected by at least one of the plurality of detection electrodes. |
地址 |
Bremen DE |