Patent ID: 8921802

Claim:
An apparatus suitable for focusing a traveling charged particle beam which is controlled in its size dimensions and will transversely pass adjacent to it, the beam's travel direction being substantially along the z-axis in a Cartesian coordinate system, said apparatus comprising: a substantially E-shaped block mounting which (α) is formed of ferromagnetic material, (β) is a preformed entity of predetermined size and dimensions having an exposed block face as its forward aspect and a flat exterior surface as its rearward aspect, (γ) has an exposed block face which presents at least three discrete and spatially distanced parallel raised ridges and at least two interposed and spatially distanced parallel recessed channels which are individually disposed along the x-axis direction and lie perpendicular to the z-axis travel direction of the charged particle beam, (δ) is dimensionally extended in the x-axis direction for a linear distance greater than the x-axis dimension size of the traveling charged particle beam, (ζ) is interactive with a charged particle beam traveling in the z-axis direction transversely over said exposed block face at a predetermined distance in the y-axis direction, wherein the transverse travel pathway of said beam is bounded by a pair of z-y planes adjacent and parallel to said E-shaped block mounting and by a pair of z-x planes normal to the forward aspect face of said E-shaped block mounting; and at least one magnetic field generating device which (i) is transversely fitted to and is integral with at least one of said raised ridge structures of said E-shaped block mounting, (ii) is transversely disposed in an x-z plane of said E-shaped block mounting at a predetermined y-axis coordinate position, (iii) presents a plurality of straight length sections, each of said straight length sections lying in parallel and being greater in dimensional extent than the breadth dimension of the charged particle beam traveling along the z-axis over said exposed block face of said E-shaped block mounting, (iv) is able to generate a magnetic field of predetermined strength on-demand whose breadth of magnetization lies along the x-axis and extends over said straight length sections, wherein along any beam travel pathway in the z-axis direction, the magnetic field so generated integrates to zero, and said generated magnetic field orthogonally extends along the y-axis, and said orthogonally extending magnetic field is dimensionally sufficient for charged particles of a prechosen mass then traveling within a beam to pass unobstructedly through said magnetic field in the z-axis direction across said exposed block face of said E-shaped block mounting, and (v) is not configured as a solenoid coil through which the beam passes.