Patent ID: 8512005

Claim:
An ion pump system which comprises a casing, a first electrode group which is configured to be in the casing, a second electrode group which is configured to be in the casing, outer magnets which produce a magnetic field inside the casing, and inner magnets which are configured to be in the casing, wherein the casing comprises one or pluralities of connecting parts which connect the ion pump system with other apparatus, the first electrode group and the second electrode group have different polarity, the casing, the first electrode group, the second electrode group and the inner magnets are configured to be arranged in the following order from the central part of the casing to outside part of the casing: the inner magnets which are along a central axis of the casing or are configured to be arranged symmetrically with respect to the central axis; a first electrode of the first electrode group, the first electrode being at the innermost of the first electrode group; a first electrode of the second electrode group, the first electrode being at the innermost of the second electrode group; a second electrode of the second electrode group, the second electrode being at the second innermost of the second electrode group; a second electrode of the first electrode group, the second electrode being at the second innermost of the first electrode group; and the outer magnets.