Calculating RF current condensation with self-consistent ray-tracing
By exploiting the nonlinear amplification of the power deposition of RF waves, current condensation promises new pathways to the stabilisation of magnetic islands. We present a numerical analysis of current condensation, coupling a geometrical optics treatment of wave propagation and damping to a th...
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| creator | Nies, Richard Reiman, Allan H Rodriguez, Eduardo Bertelli, Nicola Fisch, Nathaniel J |
| description | By exploiting the nonlinear amplification of the power deposition of RF
waves, current condensation promises new pathways to the stabilisation of
magnetic islands. We present a numerical analysis of current condensation,
coupling a geometrical optics treatment of wave propagation and damping to a
thermal diffusion equation solver in the island. Taking into account the island
geometry and relativistic damping, previous analytical theory can be made more
precise and specific scenarios can be realistically predicted. With this more
precise description, bifurcations and associated hysteresis effects could be
obtained in an ITER-like scenario at realistic parameter values. Moreover, it
is shown that dynamically varying the RF wave launching angles can lead to
hysteresis and help to avoid the nonlinear shadowing effect. |
| doi_str_mv | 10.48550/arxiv.2005.05997 |
| format | Article |
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waves, current condensation promises new pathways to the stabilisation of
magnetic islands. We present a numerical analysis of current condensation,
coupling a geometrical optics treatment of wave propagation and damping to a
thermal diffusion equation solver in the island. Taking into account the island
geometry and relativistic damping, previous analytical theory can be made more
precise and specific scenarios can be realistically predicted. With this more
precise description, bifurcations and associated hysteresis effects could be
obtained in an ITER-like scenario at realistic parameter values. Moreover, it
is shown that dynamically varying the RF wave launching angles can lead to
hysteresis and help to avoid the nonlinear shadowing effect.</description><identifier>DOI: 10.48550/arxiv.2005.05997</identifier><language>eng</language><subject>Physics - Plasma Physics</subject><creationdate>2020-05</creationdate><rights>http://arxiv.org/licenses/nonexclusive-distrib/1.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,776,881</link.rule.ids><linktorsrc>$$Uhttps://arxiv.org/abs/2005.05997$$EView_record_in_Cornell_University$$FView_record_in_$$GCornell_University$$Hfree_for_read</linktorsrc><backlink>$$Uhttps://doi.org/10.48550/arXiv.2005.05997$$DView paper in arXiv$$Hfree_for_read</backlink></links><search><creatorcontrib>Nies, Richard</creatorcontrib><creatorcontrib>Reiman, Allan H</creatorcontrib><creatorcontrib>Rodriguez, Eduardo</creatorcontrib><creatorcontrib>Bertelli, Nicola</creatorcontrib><creatorcontrib>Fisch, Nathaniel J</creatorcontrib><title>Calculating RF current condensation with self-consistent ray-tracing</title><description>By exploiting the nonlinear amplification of the power deposition of RF
waves, current condensation promises new pathways to the stabilisation of
magnetic islands. We present a numerical analysis of current condensation,
coupling a geometrical optics treatment of wave propagation and damping to a
thermal diffusion equation solver in the island. Taking into account the island
geometry and relativistic damping, previous analytical theory can be made more
precise and specific scenarios can be realistically predicted. With this more
precise description, bifurcations and associated hysteresis effects could be
obtained in an ITER-like scenario at realistic parameter values. Moreover, it
is shown that dynamically varying the RF wave launching angles can lead to
hysteresis and help to avoid the nonlinear shadowing effect.</description><subject>Physics - Plasma Physics</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNotj81KAzEUhbPpQlofwJV5gYw3M5O_pUytCoVCcT_cySQaGNOSpGrf3ml1deDjnAMfIXccqlYLAQ-YfsJXVQOICoQx6oasO5zsacIS4jvdb6g9peRiofYQRxfzzA-RfofyQbObPJtxDrlcGgnPrCS083BFFh6n7G7_c0n2m6e37oVtd8-v3eOWoVSKcSmFcn7AeoCmtrIZrcdBa-P16AWAH0CO0HIDzkureQtKA7e1Qeucb5bk_u_0KtEfU_jEdO4vMv1VpvkFUdJFzg</recordid><startdate>20200512</startdate><enddate>20200512</enddate><creator>Nies, Richard</creator><creator>Reiman, Allan H</creator><creator>Rodriguez, Eduardo</creator><creator>Bertelli, Nicola</creator><creator>Fisch, Nathaniel J</creator><scope>GOX</scope></search><sort><creationdate>20200512</creationdate><title>Calculating RF current condensation with self-consistent ray-tracing</title><author>Nies, Richard ; Reiman, Allan H ; Rodriguez, Eduardo ; Bertelli, Nicola ; Fisch, Nathaniel J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a677-16657efba2b032c63dcfab889f8df500fb06d04190ef6c81407801c29aceef3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Physics - Plasma Physics</topic><toplevel>online_resources</toplevel><creatorcontrib>Nies, Richard</creatorcontrib><creatorcontrib>Reiman, Allan H</creatorcontrib><creatorcontrib>Rodriguez, Eduardo</creatorcontrib><creatorcontrib>Bertelli, Nicola</creatorcontrib><creatorcontrib>Fisch, Nathaniel J</creatorcontrib><collection>arXiv.org</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Nies, Richard</au><au>Reiman, Allan H</au><au>Rodriguez, Eduardo</au><au>Bertelli, Nicola</au><au>Fisch, Nathaniel J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Calculating RF current condensation with self-consistent ray-tracing</atitle><date>2020-05-12</date><risdate>2020</risdate><abstract>By exploiting the nonlinear amplification of the power deposition of RF
waves, current condensation promises new pathways to the stabilisation of
magnetic islands. We present a numerical analysis of current condensation,
coupling a geometrical optics treatment of wave propagation and damping to a
thermal diffusion equation solver in the island. Taking into account the island
geometry and relativistic damping, previous analytical theory can be made more
precise and specific scenarios can be realistically predicted. With this more
precise description, bifurcations and associated hysteresis effects could be
obtained in an ITER-like scenario at realistic parameter values. Moreover, it
is shown that dynamically varying the RF wave launching angles can lead to
hysteresis and help to avoid the nonlinear shadowing effect.</abstract><doi>10.48550/arxiv.2005.05997</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Physics - Plasma Physics |
| title | Calculating RF current condensation with self-consistent ray-tracing |
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