Experimental investigations on drift waves in linear magnetized plasmas
Germany
Germany
Germany
Two main aspects concerning drift wave dynamics in linear, magnetized plasma devices are addressed in the work: In part I of the thesis, drift waves are studied in a helicon plasma. The plasma parameter regime is characterized by comparably high collision frequencies and comparably high plasma-p exceeding the electron-ion mass ratio. Single Langmui...
Germany
Germany
The linear and nonlinear dynamics of zonal flows and their interactions with drift wave turbulence is considered in the simple but illuminating generalized Charney-Hasegawa-Mima model due to Smolyakov et. al. (A.I. Smolyakov, P.H. Diamond and V.I. Shevchenko, Phys. Plasmas, 7, 1349 (2000)). Two positive definite, exact, integral invariants associat...
United Kingdom
United Kingdom
In this paper, we present the first kinetic analysis of nonlinear magnetic island evolution that includes the effect of the excitation of drift waves and extends over the complete range of frequencies comparable to the drift frequency. Our analysis brings to light three new phenomena that have important implications for our understanding of island ...
United Kingdom