Characterization of Turbulence and Transport in Magnetic Confinement Devices
Апстракт
Intermittency in the scrape-off layer (SOL) region of magnetically confine plasma and velocity intermittency of neutral flui are compared from the aspect of global and local multifractal properties. Density fluctuation in the MAST device are considered and contrasted to local velocity measurements of an air fl w into round free jet. Large deviation (multifractal) spectra are used to characterize global features revealing different energy cascade mechanisms in each of systems. A transformation invariant zero-crossing function is shown to be more reliable indicator of stable equilibrium states then the probability density function. In particular the zero-crossing function detects L-H transitions and recognizes ELMs as catastropohic events in the sense of stochastic catastrophy theory. The method may be of significan importance in the analysis and control of edge plasma turbulence.
Кључне речи:
Plasma / turbulence / SOL / transport / zero-crossingИзвор:
AIP Conference Proceedings, 2012, 1445Финансирање / пројекти:
- Напредне аналитичке, нумеричке и методе анализе примењене механике флуида и комплексних система (RS-MESTD-Basic Research (BR or ON)-174014)
- National Institute for Fusion Science for hospitality and support under the NINS-NIFS International Base Research Network
Напомена:
- Joint ITER-IAEA-ICTP Advanced Workshop on Fusion and Plasma Physics, Oct 03-14, 2011, Abdus Salam Ctr Theoret Phys (AS-ICTP), Trieste, Italy
DOI: 10.1063/1.3701883
ISSN: 0094-243X
WoS: 000302778900002
Scopus: 2-s2.0-84860608345
Колекције
Институција/група
VinčaTY - CONF AU - Rajković, Milan AU - Watanabe, T. -H. AU - Škorić, Miloš M. PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6945 AB - Intermittency in the scrape-off layer (SOL) region of magnetically confine plasma and velocity intermittency of neutral flui are compared from the aspect of global and local multifractal properties. Density fluctuation in the MAST device are considered and contrasted to local velocity measurements of an air fl w into round free jet. Large deviation (multifractal) spectra are used to characterize global features revealing different energy cascade mechanisms in each of systems. A transformation invariant zero-crossing function is shown to be more reliable indicator of stable equilibrium states then the probability density function. In particular the zero-crossing function detects L-H transitions and recognizes ELMs as catastropohic events in the sense of stochastic catastrophy theory. The method may be of significan importance in the analysis and control of edge plasma turbulence. C3 - AIP Conference Proceedings T1 - Characterization of Turbulence and Transport in Magnetic Confinement Devices VL - 1445 DO - 10.1063/1.3701883 ER -
@conference{ author = "Rajković, Milan and Watanabe, T. -H. and Škorić, Miloš M.", year = "2012", abstract = "Intermittency in the scrape-off layer (SOL) region of magnetically confine plasma and velocity intermittency of neutral flui are compared from the aspect of global and local multifractal properties. Density fluctuation in the MAST device are considered and contrasted to local velocity measurements of an air fl w into round free jet. Large deviation (multifractal) spectra are used to characterize global features revealing different energy cascade mechanisms in each of systems. A transformation invariant zero-crossing function is shown to be more reliable indicator of stable equilibrium states then the probability density function. In particular the zero-crossing function detects L-H transitions and recognizes ELMs as catastropohic events in the sense of stochastic catastrophy theory. The method may be of significan importance in the analysis and control of edge plasma turbulence.", journal = "AIP Conference Proceedings", title = "Characterization of Turbulence and Transport in Magnetic Confinement Devices", volume = "1445", doi = "10.1063/1.3701883" }
Rajković, M., Watanabe, T. -H.,& Škorić, M. M.. (2012). Characterization of Turbulence and Transport in Magnetic Confinement Devices. in AIP Conference Proceedings, 1445. https://doi.org/10.1063/1.3701883
Rajković M, Watanabe T-, Škorić MM. Characterization of Turbulence and Transport in Magnetic Confinement Devices. in AIP Conference Proceedings. 2012;1445. doi:10.1063/1.3701883 .
Rajković, Milan, Watanabe, T. -H., Škorić, Miloš M., "Characterization of Turbulence and Transport in Magnetic Confinement Devices" in AIP Conference Proceedings, 1445 (2012), https://doi.org/10.1063/1.3701883 . .