Active Control of Magneto hydrodynamic Instabilities in Hot Plasmas During the past century world wide energy consumption has risen dramatically which leads to a quest for new energy sources. Fusion of hydrogen atoms in hot plasmas is an attractive approach to solve the energy problem with abundant fuel inherent safety and no long lived radioactivity. However one of the limits on plasma performance is due to the various classes of magneto hydrodynamic instabilities that may occur. The physics and control of these instabilities in modern magnetic confinement fusion devices is the subject of this book. Written by foremost experts the contributions will provide valuable reference and up to date research reviews for old hands and newcomers alike