Beam-Ion Acceleration during Edge Localized Modes in the ASDEX Upgrade Tokamak
The acceleration of beam ions during edge localized modes (ELMs) in a tokamak is observed for the first time through direct measurements of fast-ion losses in low collisionality plasmas. The accelerated beam-ion population exhibits well-localized velocity-space structures which are revealed by means...
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| Veröffentlicht in: | Physical review letters 2018-07, Vol.121 (2), p.025002-025002, Article 025002 |
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| creator | Galdon-Quiroga, J Garcia-Munoz, M McClements, K G Nocente, M Hoelzl, M Jacobsen, A S Orain, F Rivero-Rodriguez, J F Salewski, M Sanchis-Sanchez, L Suttrop, W Viezzer, E |
| description | The acceleration of beam ions during edge localized modes (ELMs) in a tokamak is observed for the first time through direct measurements of fast-ion losses in low collisionality plasmas. The accelerated beam-ion population exhibits well-localized velocity-space structures which are revealed by means of tomographic inversion of the measurement, showing energy gains of the order of tens of keV. This suggests that the ion acceleration results from a resonant interaction between the beam ions and parallel electric fields arising during the ELM. Orbit simulations are carried out to identify the mode-particle resonances responsible for the energy gain in the particle phase space. The observation motivates the incorporation of a kinetic description of fast particles in ELM models and may contribute to a better understanding of the mechanisms responsible for particle acceleration, ubiquitous in astrophysical and space plasmas. |
| doi_str_mv | 10.1103/PhysRevLett.121.025002 |
| format | Article |
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The accelerated beam-ion population exhibits well-localized velocity-space structures which are revealed by means of tomographic inversion of the measurement, showing energy gains of the order of tens of keV. This suggests that the ion acceleration results from a resonant interaction between the beam ions and parallel electric fields arising during the ELM. Orbit simulations are carried out to identify the mode-particle resonances responsible for the energy gain in the particle phase space. The observation motivates the incorporation of a kinetic description of fast particles in ELM models and may contribute to a better understanding of the mechanisms responsible for particle acceleration, ubiquitous in astrophysical and space plasmas.</description><identifier>ISSN: 0031-9007</identifier><identifier>EISSN: 1079-7114</identifier><identifier>DOI: 10.1103/PhysRevLett.121.025002</identifier><identifier>PMID: 30085760</identifier><language>eng</language><publisher>United States: American Physical Society</publisher><subject>Computer simulation ; Energy measurement ; Orbital resonances (celestial mechanics) ; Particle acceleration ; Resonant interactions ; Space plasmas ; Tokamak devices</subject><ispartof>Physical review letters, 2018-07, Vol.121 (2), p.025002-025002, Article 025002</ispartof><rights>Copyright American Physical Society Jul 13, 2018</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c440t-9bc76200edd0cdd4067de3f282f365640bba200af6a6ec7dcedc2628354477d73</citedby><cites>FETCH-LOGICAL-c440t-9bc76200edd0cdd4067de3f282f365640bba200af6a6ec7dcedc2628354477d73</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,2863,2864,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/30085760$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Galdon-Quiroga, J</creatorcontrib><creatorcontrib>Garcia-Munoz, M</creatorcontrib><creatorcontrib>McClements, K G</creatorcontrib><creatorcontrib>Nocente, M</creatorcontrib><creatorcontrib>Hoelzl, M</creatorcontrib><creatorcontrib>Jacobsen, A S</creatorcontrib><creatorcontrib>Orain, F</creatorcontrib><creatorcontrib>Rivero-Rodriguez, J F</creatorcontrib><creatorcontrib>Salewski, M</creatorcontrib><creatorcontrib>Sanchis-Sanchez, L</creatorcontrib><creatorcontrib>Suttrop, W</creatorcontrib><creatorcontrib>Viezzer, E</creatorcontrib><creatorcontrib>ASDEX Upgrade Team</creatorcontrib><creatorcontrib>Eurofusion MST1 Team</creatorcontrib><creatorcontrib>the Eurofusion MST1 Team</creatorcontrib><creatorcontrib>the ASDEX Upgrade Team</creatorcontrib><title>Beam-Ion Acceleration during Edge Localized Modes in the ASDEX Upgrade Tokamak</title><title>Physical review letters</title><addtitle>Phys Rev Lett</addtitle><description>The acceleration of beam ions during edge localized modes (ELMs) in a tokamak is observed for the first time through direct measurements of fast-ion losses in low collisionality plasmas. The accelerated beam-ion population exhibits well-localized velocity-space structures which are revealed by means of tomographic inversion of the measurement, showing energy gains of the order of tens of keV. This suggests that the ion acceleration results from a resonant interaction between the beam ions and parallel electric fields arising during the ELM. Orbit simulations are carried out to identify the mode-particle resonances responsible for the energy gain in the particle phase space. The observation motivates the incorporation of a kinetic description of fast particles in ELM models and may contribute to a better understanding of the mechanisms responsible for particle acceleration, ubiquitous in astrophysical and space plasmas.</description><subject>Computer simulation</subject><subject>Energy measurement</subject><subject>Orbital resonances (celestial mechanics)</subject><subject>Particle acceleration</subject><subject>Resonant interactions</subject><subject>Space plasmas</subject><subject>Tokamak devices</subject><issn>0031-9007</issn><issn>1079-7114</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNpdkFtPAjEQhRujEUT_gmniiy-L025p4REVLwleopj41pR2FhbYXWx3TfDXW4Ma49NkMuecnPkIOWbQZQzSs8f5Jjzh-xjruss46wLvAfAd0magBoliTOySNkDKkgGAapGDEBYAwLjs75NWCtDvKQltcn-Opkhuq5IOrcUVelPncXGNz8sZHbkZ0nFlzSr_QEfvKoeB5iWt50iHz5ejV_qynnnjkE6qpSnM8pDsZWYV8Oh7dsjL1WhycZOMH65vL4bjxAoBdTKYWiU5ADoH1jkBUjlMM97nWSp7UsB0auLZZNJItMpZdJZL3k97QijlVNohp9vcta_eGgy1LvIQ-69MiVUTNI__SQlcQJSe_JMuqsaXsZ3mjMXIgRIyquRWZX0VgsdMr31eGL_RDPQXcf2HuI7E9ZZ4NB5_xzfTAt2v7Qdx-gkIX31A</recordid><startdate>20180713</startdate><enddate>20180713</enddate><creator>Galdon-Quiroga, J</creator><creator>Garcia-Munoz, M</creator><creator>McClements, K G</creator><creator>Nocente, M</creator><creator>Hoelzl, M</creator><creator>Jacobsen, A S</creator><creator>Orain, F</creator><creator>Rivero-Rodriguez, J F</creator><creator>Salewski, M</creator><creator>Sanchis-Sanchez, L</creator><creator>Suttrop, W</creator><creator>Viezzer, E</creator><general>American Physical Society</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>7X8</scope></search><sort><creationdate>20180713</creationdate><title>Beam-Ion Acceleration during Edge Localized Modes in the ASDEX Upgrade Tokamak</title><author>Galdon-Quiroga, J ; Garcia-Munoz, M ; McClements, K G ; Nocente, M ; Hoelzl, M ; Jacobsen, A S ; Orain, F ; Rivero-Rodriguez, J F ; Salewski, M ; Sanchis-Sanchez, L ; Suttrop, W ; Viezzer, E</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c440t-9bc76200edd0cdd4067de3f282f365640bba200af6a6ec7dcedc2628354477d73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Computer simulation</topic><topic>Energy measurement</topic><topic>Orbital resonances (celestial mechanics)</topic><topic>Particle acceleration</topic><topic>Resonant interactions</topic><topic>Space plasmas</topic><topic>Tokamak devices</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Galdon-Quiroga, J</creatorcontrib><creatorcontrib>Garcia-Munoz, M</creatorcontrib><creatorcontrib>McClements, K G</creatorcontrib><creatorcontrib>Nocente, M</creatorcontrib><creatorcontrib>Hoelzl, M</creatorcontrib><creatorcontrib>Jacobsen, A S</creatorcontrib><creatorcontrib>Orain, F</creatorcontrib><creatorcontrib>Rivero-Rodriguez, J F</creatorcontrib><creatorcontrib>Salewski, M</creatorcontrib><creatorcontrib>Sanchis-Sanchez, L</creatorcontrib><creatorcontrib>Suttrop, W</creatorcontrib><creatorcontrib>Viezzer, E</creatorcontrib><creatorcontrib>ASDEX Upgrade Team</creatorcontrib><creatorcontrib>Eurofusion MST1 Team</creatorcontrib><creatorcontrib>the Eurofusion MST1 Team</creatorcontrib><creatorcontrib>the ASDEX Upgrade Team</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><jtitle>Physical review letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Galdon-Quiroga, J</au><au>Garcia-Munoz, M</au><au>McClements, K G</au><au>Nocente, M</au><au>Hoelzl, M</au><au>Jacobsen, A S</au><au>Orain, F</au><au>Rivero-Rodriguez, J F</au><au>Salewski, M</au><au>Sanchis-Sanchez, L</au><au>Suttrop, W</au><au>Viezzer, E</au><aucorp>ASDEX Upgrade Team</aucorp><aucorp>Eurofusion MST1 Team</aucorp><aucorp>the Eurofusion MST1 Team</aucorp><aucorp>the ASDEX Upgrade Team</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Beam-Ion Acceleration during Edge Localized Modes in the ASDEX Upgrade Tokamak</atitle><jtitle>Physical review letters</jtitle><addtitle>Phys Rev Lett</addtitle><date>2018-07-13</date><risdate>2018</risdate><volume>121</volume><issue>2</issue><spage>025002</spage><epage>025002</epage><pages>025002-025002</pages><artnum>025002</artnum><issn>0031-9007</issn><eissn>1079-7114</eissn><abstract>The acceleration of beam ions during edge localized modes (ELMs) in a tokamak is observed for the first time through direct measurements of fast-ion losses in low collisionality plasmas. 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| source | American Physical Society Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Computer simulation Energy measurement Orbital resonances (celestial mechanics) Particle acceleration Resonant interactions Space plasmas Tokamak devices |
| title | Beam-Ion Acceleration during Edge Localized Modes in the ASDEX Upgrade Tokamak |
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