Abstract: An electrostatic particle beam combiner for creating a single source combining the properties of two particle beams which form a high brightness source of a selected mixture of ions of varying element types and energies. An electrostatic spherical lens is arranged to bend a low energy second particle beam along a circular path and thereafter to impinge on a surface of a sample, e.g., within a transmission electron microscope. A beam of high energy is injected into the electrostatic spherical lens through an aperture in the outer shell and steered by two spaced apart electrostatic deflectors so that the angle of entry and the point of entry can be independently adjusted so that the high energy beam leaves the spherical lens along a path which is coaxial and coincident with the second particle beam of low energy.

Abstract: A vibration isolator is disclosed to mount a cryopump expander module or other vibrating equipment on a vacuum housing. The isolator includes a welded metal bellows which both forms a vacuum-tight passage and acts as an isolating spring, and a plurality of elastomeric isolators which clamp the oscillations of the bellows.