Tandem continuous channel electron multiplier
View Patent ↗A channel electron multiplier including a single channel CEM for receiving an input particle. A multi-channel CEM is positioned after the single channel CEM for receiving emissions from the single channel CEM. An electron collector is positioned after the multi-channel CEM for generating a pulse current in response to emissions from the multi-channel CEM.
1. A channel electron multiplier comprising:
a single channel CEM for receiving an input particle;
a multi-channel CEM positioned after the single channel CEM for receiving emissions from the single channel CEM, wherein the single channel CEM and multi-channel CEM are contained in a common housing, in a monolithic construction;
an electron collector positioned after the multi-channel CEM for generating a pulse current in response to emissions from the multi-channel CEM;
a funnel for directing the particle to the single channel CEM; and
a further multi-channel CEM positioned after the multi-channel CEM for receiving emissions from the multi-channel CEM;
wherein the electron collector positioned after the further multi-channel CEM for generating a pulse current in response to emissions from the further multi-channel CEM;
wherein the multi-channel CEM includes a plurality of single body CEM units, the single body CEM units including multiple channels;
wherein a spacing between the single channel CEM and the multi-channel CEM is based on inter channel spacing of the channels in the multi-channel CEM.
2. The channel electron multiplier of claim 1 wherein:
the multi-channel CEM is a single body, multi-channel CEM.
3. The channel electron multiplier of claim 1 wherein:
the multi-channel CEM includes a plurality of single body CEM units, the single body CEM units including a single channel.