Detection of positive and negative ions

Details Detection of positive and negative ions Detection of positive and negative ions

2008-05-30

2010-12-21

Vanore, David A (Department: 2881)

Radiant energy

Ionic separation or analysis

Cyclically varying ion selecting field means

C250S281000, C250S282000, C250S283000, C250S287000, C250S288000, C250S298000, C250S299000, C250S397000, C250S398000, C250S424000, C250S492100, C315S506000, C850S043000

Reexamination Certificate

active

07855361

ABSTRACT:
An ion detector comprises an ion guide with electrodes arranged about a first axis; a positive ion detection device with an ion inlet at a first side of the ion output section offset from and at an angle to the first axis; and a negative ion detection device with an ion inlet at a second side opposite the first side, offset from and at an angle to the first axis. A negative voltage bias applied to the positive ion device accelerates positive ions toward the inlet along a path including a component along a second axis orthogonal to the first axis. A positive voltage bias applied to the negative ion detection device accelerates negative ions toward the inlet along a path that includes a component along the second axis orthogonal to the first axis in a direction generally opposite to the path of the positive ions.

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