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arXiv physics/0110051physics.plasm-phphysics.data-an
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托卡马克边缘turbulence Levy稳定过程的证据

Evidence of Levy stable process in tokamak edge turbulence

R. Jha, P. K. Kaw, D. R. Kulkarni, J. C. Parikh, ADITYA Team

摘要:

为了理解托卡马克中粒子和热量湍流输运的基本物理过程,本文用分布函数方法分析了ADITYA托卡马克擦除层等离子体中的浮位涨落的自相似性。据观察,n个数据点的总和的分布函数收敛于尺度指数的Levy分布,对于n < 40,α =1.111,对于较大的n,α =2.0。在这两个尺度范围内,边缘波动是自相似的。这一观点得到了几个支持证据的支持。结果表明,小尺度涨落主要以对流方式输送物质和热量,而大尺度涨落则以扩散方式输送物质和热量。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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