Observation of intermittency with varying toroidal magnetic field in a simple toroidal plasma

In a simple toroidal plasma, self-consistent poloidal flow generation with varying toroidal magnetic field is observed. The toroidal magnetic field is varied in strength and topology. In our previous work, a rapid transition from coherent to turbulent fluctuations in plasma parameters was observed on varying toroidal magnetic field strength from $220\hspace{0.1cm}G$ to $440\hspace{0.1cm}G$. In the present work, the toroidal magnetic field is varied in strength, topology, and the statistical properties of fluctuations are investigated [Carreras et al, Phys. Plasmas 3, 2664 (1996)]. The successive variation in toroidal magnetic field strength around $220\hspace{0.1cm}G$ is limited to a low magnitude, typically $45\hspace{0.1cm}G$, to study the transition in intermittency carefully. Further, the external vertical magnetic field is varied with toroidal magnetic field fixed at $220\hspace{0.1cm}G$ and transition in fluctuations is investigated. A comparison of probability distribution functions and deviation from Gaussianity with varying toroidal magnetic field strength and topology is made and the results will be presented.