Characterization of local turbulence in magnetic confinement devices
Abstract
A multifractal analysis based on evaluation and interpretation of large deviation spectra is applied to plasma edge turbulence data from different devices (MAST and Tore Supra). It is demonstrated that in spite of some universal features there are unique characteristics for each device as well as for different confinement regimes. In the second part of the exposition the issue of estimating the variable power law behavior of spectral densities is addressed. The analysis of this issue is performed using fractional Brownian motion (fBm) as the underlying stochastic model whose parameters are estimated locally in time by wavelet scale spectra. In this manner information about the inertial range as well as variability of the fBm parameters is obtained giving more information important for understanding edge turbulence and intermittency.
Source:
Nuclear Fusion, 2008, 48, 2Note:
- 3rd Workshop on Stochasticity in Fusion Plasmas, Mar 05-07, 2007, Julich, Germany
DOI: 10.1088/0029-5515/48/2/024016
ISSN: 0029-5515
WoS: 000255131200017
Scopus: 2-s2.0-41849101444
Collections
Institution/Community
VinčaTY - JOUR AU - Rajković, Milan AU - Škorić, Miloš M. AU - Solna, Knut AU - Antar, Ghassan PY - 2008 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6746 AB - A multifractal analysis based on evaluation and interpretation of large deviation spectra is applied to plasma edge turbulence data from different devices (MAST and Tore Supra). It is demonstrated that in spite of some universal features there are unique characteristics for each device as well as for different confinement regimes. In the second part of the exposition the issue of estimating the variable power law behavior of spectral densities is addressed. The analysis of this issue is performed using fractional Brownian motion (fBm) as the underlying stochastic model whose parameters are estimated locally in time by wavelet scale spectra. In this manner information about the inertial range as well as variability of the fBm parameters is obtained giving more information important for understanding edge turbulence and intermittency. T2 - Nuclear Fusion T1 - Characterization of local turbulence in magnetic confinement devices VL - 48 IS - 2 DO - 10.1088/0029-5515/48/2/024016 ER -
@article{ author = "Rajković, Milan and Škorić, Miloš M. and Solna, Knut and Antar, Ghassan", year = "2008", abstract = "A multifractal analysis based on evaluation and interpretation of large deviation spectra is applied to plasma edge turbulence data from different devices (MAST and Tore Supra). It is demonstrated that in spite of some universal features there are unique characteristics for each device as well as for different confinement regimes. In the second part of the exposition the issue of estimating the variable power law behavior of spectral densities is addressed. The analysis of this issue is performed using fractional Brownian motion (fBm) as the underlying stochastic model whose parameters are estimated locally in time by wavelet scale spectra. In this manner information about the inertial range as well as variability of the fBm parameters is obtained giving more information important for understanding edge turbulence and intermittency.", journal = "Nuclear Fusion", title = "Characterization of local turbulence in magnetic confinement devices", volume = "48", number = "2", doi = "10.1088/0029-5515/48/2/024016" }
Rajković, M., Škorić, M. M., Solna, K.,& Antar, G.. (2008). Characterization of local turbulence in magnetic confinement devices. in Nuclear Fusion, 48(2). https://doi.org/10.1088/0029-5515/48/2/024016
Rajković M, Škorić MM, Solna K, Antar G. Characterization of local turbulence in magnetic confinement devices. in Nuclear Fusion. 2008;48(2). doi:10.1088/0029-5515/48/2/024016 .
Rajković, Milan, Škorić, Miloš M., Solna, Knut, Antar, Ghassan, "Characterization of local turbulence in magnetic confinement devices" in Nuclear Fusion, 48, no. 2 (2008), https://doi.org/10.1088/0029-5515/48/2/024016 . .