Particle accelerators are machines which propel charged particles at very high speeds using electromagnetic fields. The sub branch of applied physics which is concerned with the design, operation and construction of such machines is referred to as accelerator physics. It employs scientific principles of various other fields such as digital signal processing, classical mechanics, quantum physics and microwave engineering. Radiotherapy, microlithography, heavy ion fusion and ion implantation are some of the techniques which have been developed using the experiments conducted within this field. This book outlines the processes and applications of accelerator physics in detail. It attempts to understand the multiple branches that fall under this discipline and how such concepts have practical applications. As this field is emerging at a rapid pace, the contents of this book will help the readers understand the modern concepts and applications of the subject.