  This paper covers the theory and technological aspects of high-voltage design
for ion sources. Electric field strengths are critical to understanding
high-voltage breakdown. The equations governing electric fields and the
techniques to solve them are discussed. The fundamental physics of high-voltage
breakdown and electrical discharges are outlined. Different types of electrical
discharges are catalogued and their behaviour in environments ranging from air
to vacuum are detailed. The importance of surfaces is discussed. The principles
of designing electrodes and insulators are introduced. The use of high-voltage
platforms and their relation to system design are discussed. The use of
commercially available high-voltage technology such as connectors, feedthroughs
and cables are considered. Different power supply technologies and their
procurement are briefly outlined. High-voltage safety, electric shocks and
system design rules are covered.
