Asymmetric Core Quadrupole with Concave Pole Tips

Abstract

A magnetic assembly for focusing an electron beam includes one or more quadrupole assemblies, each quadrupole assembly having at least a pair of separate opposing members with angular pole extensions of one opposing member facing angular pole extensions of another opposing member. An X-ray tube includes a magnetic assembly for focusing an electron beam extending from a cathode to an anode of the X-ray tube, the magnetic assembly comprising one or more quadrupole assemblies, each quadrupole assembly having at least a pair of opposing members with angular pole extensions of one opposing member facing angular pole extensions of another opposing member.

Dependencies are inferred from the claim text.