Electron Avalanche Mechanisms
The process of creating an electron avalanche, or cascade, begins with applying a large electric field to a gas or body of air (at normal temperatures) to knock out of the atoms a few electrons so that they are then accelerated by the electric field. With the extra energy imparted to a few free electrons they will soon impact upon other atoms to knock off more electrons. "These secondary events are sufficient even if there is only a small number of free electrons since these can liberate new electrons after being accelerated by the field. In this way, electron multiplication proceeds in a geometrical progression. Just as a small number of plague microbes can cause a huge epidemic, so a very small number of electrons, produced perhaps by cosmic rays or emitted from a metal surface, can cause ionization of an entire gas and turn it into a plasma." (From "Plasma - The Fourth State of Matter" by D.A. Frank-Kamenetskii (1972) p10).
Electron Cascade Generator
The electron cascade effect is the phenomenon of continuous production of electrons - throughout the environment in the air itself. What determines the production of this electron cascade effect, can be explained below by Patrick Flanagan [from his taped lecture on The Electron Field Generator c.1988]...
"Number one, we have this phenomenon whereby we found that certain insulators, and some insulators are more effective than others, if we apply a high frequency, high voltage, alternating field across an insulator that we produce this [J.Willard] Gibbs phenomenon, this non-Maxwellian field, which has a differential polarization, that is, that it creates a polarity differential between it and the environment such that neutral and charged air molecules are accelerated at extremely high speed, not very low speed, but at very high speed toward the emitter. As these molecules are accelerated they collide with other molecules in the air and when this collision occurs the electrons are knocked off the molecules, that is, free electrons are knocked off the molecules and they in turn are accelerated by this field and then collide with the other molecules causing a discharge of more electrons and this is the origin of the basis of what we call the electron cascade - we have an entire cascade of electrons being generated everywhere in the environment.
Now its true that we have a greater, that is, higher velocity, electrons being generated in the vicinity of the machine, however, so that the air passing through the machine (we have a fan that brings air through the machine, through this emitter device), although the air passing through the machine is exposed to very high concentration of free electrons the machine is also creating free electrons in space around the machine, that is, so that, it is affecting air and purifying air in the environment."
The force of the free electrons is then enhanced by dielectrophoresis and electrophoresis acting in a nonuniform electric field, resulting in the electrons being forced at a high velocity into a small volume surrounding the 'emitter device'. Such a device or configuration can be set up anywhere, on any scale - even inside a liquid providing the liquid is a dielectric.
Obviously, before a ufo craft can manipulate an electric field around it's metallic shell it first has to transform the surrounding air in some way or another so as to bring a higher level of energy out from the molecules and atoms of that air. This process of electron avalanching with it's chain-reaction effect, much the same as a nuclear explosion is a chain-reaction effect, is one way of creating a higher level of energy from what is seemingly a 'low energy source'. Another way of 'raising the octane' involves a high frequency oscillating electric field to produce electron spin resonance - the visual effect of which is an emission of light photons of various colours.