Magnetohydrodynamics modelling successfully predicts new helical states in reversed-field pinch fusion plasmas
Nonlinear fluid modelling predictions of qualitatively new self-organized helical states in the reversed-field pinch configuration are confirmed by experiments in the RFX-mod device. The new states are realized by using a seed edge magnetic field, which can impose its helical pitch to the whole plas...
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| Veröffentlicht in: | Nuclear fusion 2017-11, Vol.57 (11), p.116029 |
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| container_issue | 11 |
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| container_title | Nuclear fusion |
| container_volume | 57 |
| creator | Veranda, Marco Bonfiglio, Daniele Cappello, Susanna Escande, Dominique Franck Auriemma, Fulvio Borgogno, Dario Chacón, Luis Fassina, Alessandro Franz, Paolo Gobbin, Marco Grasso, Daniela Puiatti, Maria Ester |
| description | Nonlinear fluid modelling predictions of qualitatively new self-organized helical states in the reversed-field pinch configuration are confirmed by experiments in the RFX-mod device. The new states are realized by using a seed edge magnetic field, which can impose its helical pitch to the whole plasma. In simulations, we show increased magnetic order and reduced transport of magnetic field lines in regimes with the twist of a non-resonant mode. We reveal the existence of Cantori, encompassing the region characterized by conserved magnetic surfaces, which act as barriers to transport of magnetic field lines. This opens a new research line for transport studies in hot magnetized plasmas and highlights a path towards reversed-field pinches with high confinement at high current. |
| doi_str_mv | 10.1088/1741-4326/aa7f46 |
| format | Article |
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Fusion</addtitle><date>2017-11-01</date><risdate>2017</risdate><volume>57</volume><issue>11</issue><spage>116029</spage><pages>116029-</pages><issn>0029-5515</issn><eissn>1741-4326</eissn><coden>NUFUAU</coden><abstract>Nonlinear fluid modelling predictions of qualitatively new self-organized helical states in the reversed-field pinch configuration are confirmed by experiments in the RFX-mod device. The new states are realized by using a seed edge magnetic field, which can impose its helical pitch to the whole plasma. In simulations, we show increased magnetic order and reduced transport of magnetic field lines in regimes with the twist of a non-resonant mode. We reveal the existence of Cantori, encompassing the region characterized by conserved magnetic surfaces, which act as barriers to transport of magnetic field lines. 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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | MHD numerical modelling reversed-field pinch validation of numerical results |
| title | Magnetohydrodynamics modelling successfully predicts new helical states in reversed-field pinch fusion plasmas |
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