The Calculation of the Deflection Magnetic Field and the Electron-Beam Trajectory for Color Television

The practical calculation method for the magnetic field analysis of a saddle-shaped magnetic deflection coil with an iron core has already been reported. The authors used this calculation method to determine the deflection magnetic field. Further, by numerically solving the equation which was derived from the variation principle, the authors developed the program which determined the electron beam trajectory. By using this method, the deflection characteristics can be learned by using only the numerical values which show the physical position and the shape of the picture tube and deflection coils. In the past, the deflection system design was based on experience, but now it will be possible to depend upon theoretical analysis.