## Periodic Magnetic Deflection Focusing of Sheet Electron Beams |

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accelerating anode acceleration potential acceptance ellipse amperes anode approximately axial magnetic field beam current beam length calculated cathode position collector current component of magnetic conical surfaces copper gaskets cross-section current density curves cylinder of symmetry cylindrical system deflection angle deflection constant diameter dimension electric field electron beam electron gun experimental device experimental system focusing system given in Fig heater homogeneous solutions inch injection conditions inner and outer inner magnet inner vacuum wall insulation laminar flow magnet structure magnet system magnetic deflection focusing magnetic field focusing magnetron maximum minimal flow molybdenum netic field Oscilloscope outer vacuum wall parameters particular integral peak value periodic magnetic deflection perveance phase plane planar planes of symmetry pole faces pulse radial ripple sapphire spheres shown in Fig sinusoidal slalom focusing slope stainless steel Stanford thick trajectory equation tron vacuum system value of magnetic velocity voltage volts zero average deflection