| 摘要 |
An ion detector for a mass spectrometer is provided wherein a mask ( 10 ) is provided between a first microchannel plate ( 2 a) and a second microchannel plate ( 2 b). The mask ( 10 ) prevents ion arrival events causing a cloud of secondary electrons to be from the second microchannel plate ( 2 b) which would illuminate two collection anodes ( 5,6 ) at substantially the same time. The mask ( 10 ) also prevents electron clouds emitted which would otherwise vary significantly in intensity.
|
