A systematic development of the foundations of spectroscopy for plasmas subjected to quasi-monochromatic electric fields in the microwave or visible range. Of importance are the transverse fields present in the plasmas of tokamaks, laser fusion, and technological microwave discharges. The book describes methods for measuring the field and plasma parameters and discusses their practical application, while also presenting new results on nonpertubative analysis of the interaction of quantum systems with a strong radiation field.
