Patent ID: 8530851

Claim:
An electron beam profile measurement method, comprising: arranging a scanning system in a path of the beam, the scanning system including at least one wire extending across an opening of a frame and being movable to cause movement of the at least one wire relative to the path of the beam; virtually dividing the opening into a grid of points; conducting current measurements by: measuring independent current values of an initial point in the grid while the at least one wire is in one position relative to the beam; then moving the at least one wire relative to the beam and measuring independent current values of a new point in the grid while the at least one wire is in the moved position relative to the beam; then repeating the moving and measuring step; and processing, using a processor, the measured independent current values of a plurality of the points of the grid obtained while the at least one wire was in a plurality of different positions relative to the beam to obtain a distribution of current density of the cross-section of the beam.