Theory of quasi-channeling for electrons and positrons and quasi-channeling radiation, in systems of macroscopic extent

The theory of electron and positron channeling and radiation production in crystals is extended to macroscopic scale systems. Systems that exhibit periodicity along the axis of beam propagation, specifically, periodic electrostatic fields are examined, where the dimensions of the field periodicity (1/sub z/) are much greater than typical inter-atomic lattice spacing (1/sub L/), e.g. 1/sub z/ >> 1/sub L/. In addition, the limiting case of the flat plate is studied and its relevance to Quasi-Channeling theory analyzed. Effects of beam properties on the proposed phenomenon of Quasi-Channeling are discussed. The feasibility of a laser based on this phenomenon is examined theoretically. Differences between the properties of the proposed Quasi-Channeling Radiation and Radiation produced by wigglers (e.g. Free Electron Lasers) are discussed