Progress in the development of electrostatic deflection

Internal electro-static yokes for bi-axial deflection are made by printing interleaved electrode patterns of special shape on the inside of a glass cone. These "Deflectron" units have been improved to meet high standards of performance. Two units have been developed: (1) A cylindrical or "pencil" Deflectron with 31° aperture. (2) A conical type with 67° aperture. The geometry of the electrode configuration required for field uniformity will be described.