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| HAL: hal-00001852, version 1 |
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| Statistical analysis of correlations and intermittency of a turbulent rotating column in a magnetoplasma device |
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| Simone Magni 1H. E. Roman 1 |
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| (2004-06-14) |
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| A detailed statistical analysis of density fluctuations in the cylindrical non-fusion device "Mistral" is performed. The experimental set-up is implemented in order to reach turbulent behavior in the rotating plasma column. Two different turbulent regimes are obtained corresponding to two selected sets of values for the anode potential and the biasing of the collecting plate. The first regime displays a slowly-rotating column characterized by the presence of a shear layer separating the plasma bulk from the scrape-off layer (SOL), the latter showing a strong intermittent behavior. The second regime corresponds to a weakly-rotating column in which coherence is lost in the plasma bulk and a standard diffusive process takes place in the SOL. These findings are supported by the calculation of the Hurst exponent of the turbulent signals using Wavelet-analysis techniques. |
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| 1: | Dipartimento di Fisica (DIPARTIMENTO DI FISICA) |
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Universita di Milano-Biccoca |
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| 2: | Physique des interactions ioniques et moléculaires (PIIM) |
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CNRS : UMR6633 – Université de Provence - Aix-Marseille I |
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| 3: | Département de Recherche sur la Fusion Contrôlée (ASSOCIATION EURATOM-CEA) |
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CEA |
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| Subject | : | Physics/Physics/Plasma Physics |
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| waves and instabilities – turbulence |
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| Attached file list to this document: | |||||
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| hal-00001852, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00001852 | |
| oai:hal.archives-ouvertes.fr:hal-00001852 | |
| From: Simone Magni | |
| Submitted on: Tuesday, 26 October 2004 11:07:29 | |
| Updated on: Tuesday, 26 October 2004 12:11:19 | |
