Patent ID: 8246314

Claim:
An ion pump comprising: a casing ( 1 ); a first electrode ( 2 ) provided inside the casing ( 1 ); a plurality of cylindrical magnets ( 4 ) fixed to the casing, which are located in a row at intervals in the central axis direction of the casing ( 1 ); a second electrode ( 3 ) arranged between the first electrode ( 2 ) and the plurality of cylindrical magnets ( 4 ), which has a different polarity from that of the first electrode ( 2 ); and a connection part ( 5 ) for connecting the casing ( 1 ) with other devices, wherein the plurality of cylindrical magnets are configured so that the surfaces of the adjacent cylindrical magnets have the same polarities, wherein each of the surfaces of the adjacent cylindrical magnets are North pole or South pole.