This book presents dynamics of multiple double layers developed in front of a positively biased electrode during high pressure glow discharge in a toroidal vessel of tight aspect ratio. The plasma parameters measured on poloidal plane, at various toroidal locations (near and far from anode), show signatures of double layer formation. Although glow discharge (without magnetic field) should be independent of device geometry, but the stringent boundary conditions imposed by the simple toroidal geometry generate conditions conducive for plasma to grow in size and eventually occupy the entire volume of the device. Double layers have found various applications in basic plasma laboratory experiments, material science and futuristic rocket thruster technology. An objective of this work is to explore some innovative features and applications of such versatile source of plasma generation in a toroidal magnetized confinement. This book is meant for Plasma Physicists, researchers and all those ingenious minds, in the field of basic as well as advanced research, who are consistently working towards harnessing the magic of plasma for the greater benefit of humanity.