Generation of charged particle vortex waves University of Antwerp
A device (100) for imparting an orbital angular momentum to a charged particle wave propagating along an axis (105) in a charged particle beam generating apparatus, the device comprising a first conductive element (110) comprising a plurality of angularly spaced electrical conductors (112) arranged around the axis (105), a second conductive element (120), in which said first conductive element (110) and said second conductive element (120) are spaced apart along the direction of said axis (105), and in which said first conductive element (110) and said second conductive element (120) are ...