| CPC H01J 49/025 (2013.01) [H01J 43/30 (2013.01); H01J 49/0031 (2013.01); H01J 49/4255 (2013.01)] | 5 Claims |

|
1. A particle detector comprising an electron multiplier and a conversion dynode, wherein the electron multiplier comprises a plurality of dynodes in an amplification chain configured to form an amplified electron signal output from a charged particle emitted by a conversion dynode, and wherein the electron multiplier is rotatable in any direction above the conversion dynode.
|