electrostatic_field-insulator

High-Voltage Insulator (from left: solution mesh after adaptive process, scalar potential with equipotential lines and vectors of displacement, electric field)

electrostatic_field-depressed_collector

Trajectories of electrons in depressed collector

http://youtu.be/qjqj4JKQ0HE

Sparkgap example from video tutorial.

http://youtu.be/LGLQGzNXEpE

Oscilloscope example from video tutorial.