Mass Spectrometer
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United States of America Patent
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Issued Date -
May 29, 2008
app pub date -
Apr 26, 2005
filing date -
Apr 26, 2004
priority date (Note) -
Abandoned
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Abstract
An ion detector for a mass spectrometer is provided wherein a mask (10) is provided between a first microchannel plate (2a) and a second microchannel plate (2b). The mask (10) prevents ion arrival events causing a cloud of secondary electrons to be from the second microchannel plate (2b) 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.
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