Long-time tails do not necessarily imply self-organized criticality or the breakdown of the standard transport paradigm

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Description

Numerical measurements and analytical studies are performed on a stochastic model with features relevant to plasma confinement. Although the model lacks crucial features of self-organized criticality (SOC) and its transport can be computed by standard techniques, it nevertheless exhibits intermittency and algebraic time correlations. This suggests that SOC need not be the explanation for observed long-time tails in experimental fluctuation data. Arguments based on the renormalized spectral balance equation, and simulation of a standard nonlinear paradigm, predict a range of Hurst exponents in reasonable agreement with the observations without invoking submarginal dynamics.

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253 Kilobytes pages

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Krommes, J.A. & Ottaviani, M. January 18, 2000.

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Description

Numerical measurements and analytical studies are performed on a stochastic model with features relevant to plasma confinement. Although the model lacks crucial features of self-organized criticality (SOC) and its transport can be computed by standard techniques, it nevertheless exhibits intermittency and algebraic time correlations. This suggests that SOC need not be the explanation for observed long-time tails in experimental fluctuation data. Arguments based on the renormalized spectral balance equation, and simulation of a standard nonlinear paradigm, predict a range of Hurst exponents in reasonable agreement with the observations without invoking submarginal dynamics.

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253 Kilobytes pages

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INIS; OSTI as DE00750264

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  • Other Information: PBD: 18 Jan 2000

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  • Report No.: PPPL--3421
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/750264 | External Link
  • Office of Scientific & Technical Information Report Number: 750264
  • Archival Resource Key: ark:/67531/metadc703550

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  • January 18, 2000

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 15, 2016, 7:35 p.m.

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Krommes, J.A. & Ottaviani, M. Long-time tails do not necessarily imply self-organized criticality or the breakdown of the standard transport paradigm, report, January 18, 2000; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc703550/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.