2001/10/17 by R. Jha, Jha, R., P. K. Kaw +10
Physics and Astronomy · #Data Analysis #FOS: Physical sciences #Magnetic confinement fusion research #Plasma Physics (physics.plasm-ph) #Statistics and Probability (physics.data-an) #physics.data-an #physics.plasm-ph
paper · pdf · doi:10.48550/arxiv.physics/0110051
13 pages and 4 encapsulated postscript figures
arxiv created 2001/10/17 · openalex publication_date 2001/10/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In an effort to understand the fundamental physics of turbulent transport of particles and heat in a tokamak, the floating potential fluctuations in the the scrape-off layer plasma of ohmically heated ADITYA tokamak are analysed for self-similarity using distribution function approach. It is observed that the distribution function of a sum of n data points converges to a Levy distribution of scale index, alpha=1.111 for n < 40 and alpha=2.0 for larger n. In both scaling ranges, the edge fluctuation is self-similar. This observation is backed by several supporting evidences. The results indicate that the small scale fluctuations transport matter and heat dominantly by convection whereas the transport due to large scale flucuations is by a diffusive process.