An electron beam trajectory controlling device includes a main deflection
section having a first main coil and defining a first path and being
configured to control a trajectory of an electron traveling along the
first path. The main deflection section includes a first auxiliary coil
provided proximate the first main coil. A minor deflection section is
provided adjacent to the main deflection section and has a first minor
coil that is coupled to the first auxiliary coil. The minor deflection
section defines a second electron path that is aligned to the first path.
The minor deflection section cooperates with the main deflection section
to control the trajectory of the electron.
