"Version: 20160601"--Title page verso.Includes bibliographical references.Preface -- 1. Introduction -- 1.1. Research into and interest in the long air gap discharge -- 1.2. Scope and objectives -- 1.3. Intended audience2. The background of air gap discharge theory -- 2.1. Introduction -- 2.2. Ionization phenomena -- 2.3. Cross section and mean free path--elastic collisions -- 2.4. Mobility, di…