Patent ID: 7973290

Claim:
A beam energy identification system, comprising: an electrostatic beam scanner configured to receive an ion beam, wherein the ion beam is deflected along a fast scan axis via a variation of a scanner voltage applied to the electrostatic beam scanner, therein defining a scanned ion beam; a first Faraday cup positioned along the fast scan axis; and a second Faraday cup positioned along the fast scan axis, wherein the scanner voltage is measured when a peak of the scanned ion beam is present at the respective first Faraday cup and second Faraday cup, and wherein a beam energy (E) is defined by: E =(Δθ 1S q )/( K 1S ΔV 1S ), wherein: Δθ 1S a shift of angle of the scanned ion beam; q is a charge value of ions of the scanned ion beam; K 1S is a constant throughout ranges of beam energy and scanner voltage; and ΔV 1s is a difference in scanner voltages associated with the respective peaks of the scanned ion beam at the first Faraday cup and the second Faraday cup.