Abstract: Apparatus and method for efficiently transferring energy through a medium between a source and a target which in one form includes a rigid frame supporting a plurality of electrically conductive probe strips having probe tips or points spaced therealong and a plurality of connected grid wires or rods in spaced relation to the probe tips or points and electrically insulated therefrom. The grid wires are arranged in at least a pair configuration with respect to each of the probe strips. The probe points are disposed in facing relation toward the target and each grid wire pair is equally disposed in relation to the axis of the probe strip points that it serves. A high voltage low amperage direct current source is connected to the probe strips. In another form the apparatus includes a single probe tip or point in combination with a pair of electrically connected grid wires.