In order to improve the electron beam deflection scanning frequency and magnetic field uniformity

a low impedance deflection scanning coil for the electron beam gun is designed

employing the Helmholtz air-core coil. Adopting the finite element analysis software ANSYS workbench

the magnetic field distribution of the deflection scanning coil is simulated

and the electromagnetic field in the coil is measured by the gauss meter. It showed that the analog data is consistent with the measured data and the magnetic flux density and uniformity of the magnetic field inside the coil could satisfy the requirement of the electron beam high frequency deflection scanning. The actual scanning test showed that the coil can achieve the two-point electron beam high frequency deflection scanning

reaching a 30kHz frequency.