An electromagnetic system includes a channel and at least one chamber comprising a first end and a second end. The channel traverses at least a portion of a longitudinal length of the at least one chamber, whereby the channel enters the chamber at the first end and exits the chamber at the second end. The channel includes an internal cavity for allowing materials to flow therein and be exposed to electromagnetic energy. In one embodiment, the chamber is designed so that the materials in the channel is exposed to lower electromagnetic energy at the first end of the chamber and exposed to a higher electromagnetic energy at the second end of the chamber.
