The application describes a rotatable anode for an X-ray tube, wherein the anode comprises a first unit adapted for being hit by a first electron beam at least a second unit adapted for being hit by at least a second electron beam, wherein the first unit and the at least second unit are electrically isolated from each other. One procedure includes providing a superabrasive precursor including a source material in a metal matrix. The invention also relates to a method for preparing such an additive. In one embodiment, the circuit is designed for a circuit having N\u2032 inputs, where N\u2032 is 3n or 2*3n, and the N\u2032-N most significant inputs are set to fixed values. A plurality of asperities are formed from the front blade edge toward the rear blade edge on at least one of dorsal and ventral sides of each blade.