This volume contains topical papers covering the various aspects of instrumentation in high energy physics. The subjects of the contributions, all previously unpublished, have been chosen to provide an overview of the fundamental processes and of the technological problems encountered in detecting, tracking and identifying charged and neutral particles in modern particle physics experiments.Each contribution offers a concise but complete description of the state-of-the-art regarding the subject, and is addressed to post-doctoral and research staff readers; it will also be found useful as a teaching aid for students and participants in specialized schools and workshops on intermediate and high energy experimental physics.