Patent ID: 7288772

Claim:
An apparatus for characterization of a micro beam, comprising: a micro modified Faraday cup assembly positioned in the path of the micro beam, said micro modified Faraday cup assembly including a first layer of material, said first layer of material comprising an electrical conducting refractory material and having at least one first layer radial slit extending through said first layer; an electrical ground connected to said first layer; a second layer of material operatively connected to said first layer of material, said second layer of material comprising an insulating material and having at least one second layer radial slit that is aligned with said first layer radial slit, said second layer radial slit extending through said second layer; a third layer of material operatively connected to said second layer of material, said third layer of material comprising a conducting material and having at least one third layer radial slit that is aligned with said second layer radial slit, said third layer radial slit extending through said third layer; a fourth layer of material operatively connected to said third layer of material, said fourth layer comprising an electrical conducting material; and a electrical measuring device connected to said fourth layer.