Simulation of convective transport during frequency chirping of a TAE using the MEGA code
We present a procedure to examine energetic particle phase-space during long range frequency chirping phenomena in tokamak plasmas. To apply the proposed method, we have performed self-consistent simulations using the MEGA code and analyzed the simulation data. We demonstrate a traveling wave in pha...
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| Veröffentlicht in: | Nuclear fusion 2022-03, Vol.62 (3), p.36025 |
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| creator | Hezaveh, H. Todo, Y. Qu, Z.S. Breizman, B.N. Hole, M.J. |
| description | We present a procedure to examine energetic particle phase-space during long range frequency chirping phenomena in tokamak plasmas. To apply the proposed method, we have performed self-consistent simulations using the MEGA code and analyzed the simulation data. We demonstrate a traveling wave in phase-space and that there exist specific slices of phase-space on which the resonant particles lie throughout the wave evolution. For non-linear evolution of an
n
= 6 toroidicity-induced Alfvén eigenmode (TAE), our results reveal the formation of coherent phase-space structures (holes/clumps) after coarse-graining of the distribution function. These structures cause a convective transport in phase-space which implies a radial drift of the resonant particles. We also demonstrate that the rate of frequency chirping increases with the TAE damping rate. Our observations of the TAE behavior and the corresponding phase-space dynamics are consistent with the Berk–Breizman theory. |
| doi_str_mv | 10.1088/1741-4326/ac49ab |
| format | Article |
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n
= 6 toroidicity-induced Alfvén eigenmode (TAE), our results reveal the formation of coherent phase-space structures (holes/clumps) after coarse-graining of the distribution function. These structures cause a convective transport in phase-space which implies a radial drift of the resonant particles. We also demonstrate that the rate of frequency chirping increases with the TAE damping rate. Our observations of the TAE behavior and the corresponding phase-space dynamics are consistent with the Berk–Breizman theory.</description><identifier>ISSN: 0029-5515</identifier><identifier>EISSN: 1741-4326</identifier><identifier>DOI: 10.1088/1741-4326/ac49ab</identifier><identifier>CODEN: NUFUAU</identifier><language>eng</language><publisher>United States: IOP Publishing</publisher><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY ; convective transport in tokamaks ; energetic particle instabilities in tokamaks ; fast particles conservation law in toroidal systems ; frequency chirping of Alfven waves ; self-consistent simulations using the MEGA code ; wave-particle interaction</subject><ispartof>Nuclear fusion, 2022-03, Vol.62 (3), p.36025</ispartof><rights>2022 IAEA, Vienna</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c380t-21d4eb706840bb6c2d7685249e2f68315acc56614bdc7c1b3073c89f0be383983</citedby><cites>FETCH-LOGICAL-c380t-21d4eb706840bb6c2d7685249e2f68315acc56614bdc7c1b3073c89f0be383983</cites><orcidid>0000-0002-7908-6497 ; 0000-0002-1164-4798 ; 0000-0002-9550-8776 ; 0000-0001-9323-8285 ; 0000-0003-4628-6983 ; 0000000211644798 ; 0000000279086497 ; 0000000193238285 ; 0000000346286983 ; 0000000295508776</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1741-4326/ac49ab/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>230,314,776,780,881,27901,27902,53821,53868</link.rule.ids><backlink>$$Uhttps://www.osti.gov/servlets/purl/1867575$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Hezaveh, H.</creatorcontrib><creatorcontrib>Todo, Y.</creatorcontrib><creatorcontrib>Qu, Z.S.</creatorcontrib><creatorcontrib>Breizman, B.N.</creatorcontrib><creatorcontrib>Hole, M.J.</creatorcontrib><creatorcontrib>Univ. of Texas, Austin, TX (United States). Institute for Fusion Studies</creatorcontrib><title>Simulation of convective transport during frequency chirping of a TAE using the MEGA code</title><title>Nuclear fusion</title><addtitle>NF</addtitle><addtitle>Nucl. Fusion</addtitle><description>We present a procedure to examine energetic particle phase-space during long range frequency chirping phenomena in tokamak plasmas. To apply the proposed method, we have performed self-consistent simulations using the MEGA code and analyzed the simulation data. We demonstrate a traveling wave in phase-space and that there exist specific slices of phase-space on which the resonant particles lie throughout the wave evolution. For non-linear evolution of an
n
= 6 toroidicity-induced Alfvén eigenmode (TAE), our results reveal the formation of coherent phase-space structures (holes/clumps) after coarse-graining of the distribution function. These structures cause a convective transport in phase-space which implies a radial drift of the resonant particles. We also demonstrate that the rate of frequency chirping increases with the TAE damping rate. Our observations of the TAE behavior and the corresponding phase-space dynamics are consistent with the Berk–Breizman theory.</description><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</subject><subject>convective transport in tokamaks</subject><subject>energetic particle instabilities in tokamaks</subject><subject>fast particles conservation law in toroidal systems</subject><subject>frequency chirping of Alfven waves</subject><subject>self-consistent simulations using the MEGA code</subject><subject>wave-particle interaction</subject><issn>0029-5515</issn><issn>1741-4326</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNp9kM9LwzAcxYMoOKd3j8GDJ-vyu-lxyJzCxIPz4Cm0aeoytqQm6WD_vS0VT-Lpy_fxeQ_eA-Aao3uMpJzhnOGMUSJmpWZFWZ2Aya90CiYIkSLjHPNzcBHjFiHMMKUT8PFm992uTNY76BuovTsYnezBwBRKF1sfEqy7YN0nbIL56ozTR6g3NrSD1DtKuJ4vYBeHN20MfFks531MbS7BWVPuorn6uVPw_rhYPzxlq9fl88N8lWkqUcoIrpmpciQkQ1UlNKlzITlhhSGNkBTzUmsuBGZVrXONK4pyqmXRoMpQSQtJp-BmzPUxWRW1TUZv-h6u76GwFDnPeQ-hEdLBxxhMo9pg92U4KozUsJ8axlLDWGrcr7fcjRbrW7X1XXB9i__w2z9w1yhBFFWICkS4auuGfgPZNX21</recordid><startdate>20220301</startdate><enddate>20220301</enddate><creator>Hezaveh, H.</creator><creator>Todo, Y.</creator><creator>Qu, Z.S.</creator><creator>Breizman, B.N.</creator><creator>Hole, M.J.</creator><general>IOP Publishing</general><general>IOP Science</general><scope>AAYXX</scope><scope>CITATION</scope><scope>OIOZB</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0002-7908-6497</orcidid><orcidid>https://orcid.org/0000-0002-1164-4798</orcidid><orcidid>https://orcid.org/0000-0002-9550-8776</orcidid><orcidid>https://orcid.org/0000-0001-9323-8285</orcidid><orcidid>https://orcid.org/0000-0003-4628-6983</orcidid><orcidid>https://orcid.org/0000000211644798</orcidid><orcidid>https://orcid.org/0000000279086497</orcidid><orcidid>https://orcid.org/0000000193238285</orcidid><orcidid>https://orcid.org/0000000346286983</orcidid><orcidid>https://orcid.org/0000000295508776</orcidid></search><sort><creationdate>20220301</creationdate><title>Simulation of convective transport during frequency chirping of a TAE using the MEGA code</title><author>Hezaveh, H. ; Todo, Y. ; Qu, Z.S. ; Breizman, B.N. ; Hole, M.J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-21d4eb706840bb6c2d7685249e2f68315acc56614bdc7c1b3073c89f0be383983</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>70 PLASMA PHYSICS AND FUSION TECHNOLOGY</topic><topic>convective transport in tokamaks</topic><topic>energetic particle instabilities in tokamaks</topic><topic>fast particles conservation law in toroidal systems</topic><topic>frequency chirping of Alfven waves</topic><topic>self-consistent simulations using the MEGA code</topic><topic>wave-particle interaction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hezaveh, H.</creatorcontrib><creatorcontrib>Todo, Y.</creatorcontrib><creatorcontrib>Qu, Z.S.</creatorcontrib><creatorcontrib>Breizman, B.N.</creatorcontrib><creatorcontrib>Hole, M.J.</creatorcontrib><creatorcontrib>Univ. of Texas, Austin, TX (United States). Institute for Fusion Studies</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><jtitle>Nuclear fusion</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hezaveh, H.</au><au>Todo, Y.</au><au>Qu, Z.S.</au><au>Breizman, B.N.</au><au>Hole, M.J.</au><aucorp>Univ. of Texas, Austin, TX (United States). Institute for Fusion Studies</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Simulation of convective transport during frequency chirping of a TAE using the MEGA code</atitle><jtitle>Nuclear fusion</jtitle><stitle>NF</stitle><addtitle>Nucl. Fusion</addtitle><date>2022-03-01</date><risdate>2022</risdate><volume>62</volume><issue>3</issue><spage>36025</spage><pages>36025-</pages><issn>0029-5515</issn><eissn>1741-4326</eissn><coden>NUFUAU</coden><abstract>We present a procedure to examine energetic particle phase-space during long range frequency chirping phenomena in tokamak plasmas. To apply the proposed method, we have performed self-consistent simulations using the MEGA code and analyzed the simulation data. We demonstrate a traveling wave in phase-space and that there exist specific slices of phase-space on which the resonant particles lie throughout the wave evolution. For non-linear evolution of an
n
= 6 toroidicity-induced Alfvén eigenmode (TAE), our results reveal the formation of coherent phase-space structures (holes/clumps) after coarse-graining of the distribution function. These structures cause a convective transport in phase-space which implies a radial drift of the resonant particles. We also demonstrate that the rate of frequency chirping increases with the TAE damping rate. Our observations of the TAE behavior and the corresponding phase-space dynamics are consistent with the Berk–Breizman theory.</abstract><cop>United States</cop><pub>IOP Publishing</pub><doi>10.1088/1741-4326/ac49ab</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0002-7908-6497</orcidid><orcidid>https://orcid.org/0000-0002-1164-4798</orcidid><orcidid>https://orcid.org/0000-0002-9550-8776</orcidid><orcidid>https://orcid.org/0000-0001-9323-8285</orcidid><orcidid>https://orcid.org/0000-0003-4628-6983</orcidid><orcidid>https://orcid.org/0000000211644798</orcidid><orcidid>https://orcid.org/0000000279086497</orcidid><orcidid>https://orcid.org/0000000193238285</orcidid><orcidid>https://orcid.org/0000000346286983</orcidid><orcidid>https://orcid.org/0000000295508776</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY convective transport in tokamaks energetic particle instabilities in tokamaks fast particles conservation law in toroidal systems frequency chirping of Alfven waves self-consistent simulations using the MEGA code wave-particle interaction |
| title | Simulation of convective transport during frequency chirping of a TAE using the MEGA code |
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