Fast-ion velocity-space tomography using slowing-down regularization in EAST plasmas with co- and counter-current neutral beam injection
We demonstrate 2D reconstructions of the fast-ion velocity distribution from two-view fast-ion D-alpha (FIDA) measurements at the EAST tokamak. By expressing the distribution in a basis relying on the fast-ion slowing-down process in fusion plasmas, the smoothness and velocity-space resolution of re...
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| Veröffentlicht in: | Plasma physics and controlled fusion 2020-11, Vol.62 (11), p.115019 |
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| creator | Madsen, B Huang, J Salewski, M Järleblad, H Hansen, P C Stagner, L Su, J Chang, J F Fu, J Wang, J F Liang, L Z Zhong, G Q Li, Y Y Lyu, B Liu, H Q Zang, Q Luo, Z P Nocente, M Moseev, D Fan, T S Zhang, Y M Yang, D Sun, J Q Liao, L Y |
| description | We demonstrate 2D reconstructions of the fast-ion velocity distribution from two-view fast-ion D-alpha (FIDA) measurements at the EAST tokamak. By expressing the distribution in a basis relying on the fast-ion slowing-down process in fusion plasmas, the smoothness and velocity-space resolution of reconstructions are improved. We reconstruct distributions of fast ions born from simultaneous co- and counter-current neutral beam injection and detect the expected distinct change in fast-ion birth pitch when comparing discharges utilizing different neutral beam injectors. For purely co-current injection, we find a good agreement between TRANSP-predicted and reconstructed fast-ion densities, pressures and current densities for energies above 20 keV. We furthermore illustrate the improvement of the reconstructed high-energy range (> 40 keV) of the distribution by combining FIDA with neutron emission spectroscopy measurements with the compact single-plate EJ301 scintillator. |
| doi_str_mv | 10.1088/1361-6587/abb79b |
| format | Article |
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We furthermore illustrate the improvement of the reconstructed high-energy range (> 40 keV) of the distribution by combining FIDA with neutron emission spectroscopy measurements with the compact single-plate EJ301 scintillator.</description><identifier>ISSN: 0741-3335</identifier><identifier>EISSN: 1361-6587</identifier><identifier>DOI: 10.1088/1361-6587/abb79b</identifier><identifier>CODEN: PLPHBZ</identifier><language>eng</language><publisher>IOP Publishing</publisher><subject>EAST tokamak ; fast ions ; fast-ion D-alpha spectroscopy ; slowing-down regularization ; velocity-space tomography</subject><ispartof>Plasma physics and controlled fusion, 2020-11, Vol.62 (11), p.115019</ispartof><rights>Technical University of Denmark</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c286t-cd63a9fdf3f20b6f028fa8cfd343e6d9bff63ed992607c0540d759f0a81ca4ab3</citedby><cites>FETCH-LOGICAL-c286t-cd63a9fdf3f20b6f028fa8cfd343e6d9bff63ed992607c0540d759f0a81ca4ab3</cites><orcidid>0000-0001-5662-809X ; 0000-0001-9568-174X ; 0000-0003-1126-686X ; 0000-0002-3699-679X ; 0000-0002-2978-908X ; 0000-0002-2771-6979 ; 0000-0003-0170-5275 ; 0000-0001-5716-467X ; 0000-0001-5516-3729</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1361-6587/abb79b/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,778,782,27907,27908,53829,53876</link.rule.ids></links><search><creatorcontrib>Madsen, B</creatorcontrib><creatorcontrib>Huang, J</creatorcontrib><creatorcontrib>Salewski, M</creatorcontrib><creatorcontrib>Järleblad, H</creatorcontrib><creatorcontrib>Hansen, P C</creatorcontrib><creatorcontrib>Stagner, L</creatorcontrib><creatorcontrib>Su, J</creatorcontrib><creatorcontrib>Chang, J F</creatorcontrib><creatorcontrib>Fu, J</creatorcontrib><creatorcontrib>Wang, J F</creatorcontrib><creatorcontrib>Liang, L Z</creatorcontrib><creatorcontrib>Zhong, G Q</creatorcontrib><creatorcontrib>Li, Y Y</creatorcontrib><creatorcontrib>Lyu, B</creatorcontrib><creatorcontrib>Liu, H Q</creatorcontrib><creatorcontrib>Zang, Q</creatorcontrib><creatorcontrib>Luo, Z P</creatorcontrib><creatorcontrib>Nocente, M</creatorcontrib><creatorcontrib>Moseev, D</creatorcontrib><creatorcontrib>Fan, T S</creatorcontrib><creatorcontrib>Zhang, Y M</creatorcontrib><creatorcontrib>Yang, D</creatorcontrib><creatorcontrib>Sun, J Q</creatorcontrib><creatorcontrib>Liao, L Y</creatorcontrib><title>Fast-ion velocity-space tomography using slowing-down regularization in EAST plasmas with co- and counter-current neutral beam injection</title><title>Plasma physics and controlled fusion</title><addtitle>PPCF</addtitle><addtitle>Plasma Phys. Control. Fusion</addtitle><description>We demonstrate 2D reconstructions of the fast-ion velocity distribution from two-view fast-ion D-alpha (FIDA) measurements at the EAST tokamak. By expressing the distribution in a basis relying on the fast-ion slowing-down process in fusion plasmas, the smoothness and velocity-space resolution of reconstructions are improved. We reconstruct distributions of fast ions born from simultaneous co- and counter-current neutral beam injection and detect the expected distinct change in fast-ion birth pitch when comparing discharges utilizing different neutral beam injectors. For purely co-current injection, we find a good agreement between TRANSP-predicted and reconstructed fast-ion densities, pressures and current densities for energies above 20 keV. We furthermore illustrate the improvement of the reconstructed high-energy range (> 40 keV) of the distribution by combining FIDA with neutron emission spectroscopy measurements with the compact single-plate EJ301 scintillator.</description><subject>EAST tokamak</subject><subject>fast ions</subject><subject>fast-ion D-alpha spectroscopy</subject><subject>slowing-down regularization</subject><subject>velocity-space tomography</subject><issn>0741-3335</issn><issn>1361-6587</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp1kF1LwzAUhoMoOKf3XuZWMC5p2rS9HGN-wMAL53U4TZOto0tKkjrmL_Bn2zLxSuHAC4fzvBwehG4ZfWC0KGaMC0ZEVuQzqKq8rM7Q5Hd1jiY0TxnhnGeX6CqEHaWMFYmYoK9HCJE0zuIP3TrVxCMJHSiNo9u7jYdue8R9aOwGh9YdhiS1O1js9aZvwTefEEe2sXg5f1vjroWwh4APTdxi5QgGWw_Z26g9Ub332kZsdR89tLjSsB_InVZjxzW6MNAGffOTU_T-uFwvnsnq9ellMV8RlRQiElULDqWpDTcJrYShSWGgUKbmKdeiLitjBNd1WSaC5opmKa3zrDQUCqYghYpPET31Ku9C8NrIzjd78EfJqBxNylGbHLXJk8kBuTshjevkzvXeDg_KrlNGikQyNkxGWSm74aspuv_j9t_qb0LQh4s</recordid><startdate>20201101</startdate><enddate>20201101</enddate><creator>Madsen, B</creator><creator>Huang, J</creator><creator>Salewski, M</creator><creator>Järleblad, H</creator><creator>Hansen, P C</creator><creator>Stagner, L</creator><creator>Su, J</creator><creator>Chang, J F</creator><creator>Fu, J</creator><creator>Wang, J F</creator><creator>Liang, L Z</creator><creator>Zhong, G Q</creator><creator>Li, Y Y</creator><creator>Lyu, B</creator><creator>Liu, H Q</creator><creator>Zang, Q</creator><creator>Luo, Z P</creator><creator>Nocente, M</creator><creator>Moseev, D</creator><creator>Fan, T S</creator><creator>Zhang, Y M</creator><creator>Yang, D</creator><creator>Sun, J Q</creator><creator>Liao, L Y</creator><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0001-5662-809X</orcidid><orcidid>https://orcid.org/0000-0001-9568-174X</orcidid><orcidid>https://orcid.org/0000-0003-1126-686X</orcidid><orcidid>https://orcid.org/0000-0002-3699-679X</orcidid><orcidid>https://orcid.org/0000-0002-2978-908X</orcidid><orcidid>https://orcid.org/0000-0002-2771-6979</orcidid><orcidid>https://orcid.org/0000-0003-0170-5275</orcidid><orcidid>https://orcid.org/0000-0001-5716-467X</orcidid><orcidid>https://orcid.org/0000-0001-5516-3729</orcidid></search><sort><creationdate>20201101</creationdate><title>Fast-ion velocity-space tomography using slowing-down regularization in EAST plasmas with co- and counter-current neutral beam injection</title><author>Madsen, B ; Huang, J ; Salewski, M ; Järleblad, H ; Hansen, P C ; Stagner, L ; Su, J ; Chang, J F ; Fu, J ; Wang, J F ; Liang, L Z ; Zhong, G Q ; Li, Y Y ; Lyu, B ; Liu, H Q ; Zang, Q ; Luo, Z P ; Nocente, M ; Moseev, D ; Fan, T S ; Zhang, Y M ; Yang, D ; Sun, J Q ; Liao, L Y</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c286t-cd63a9fdf3f20b6f028fa8cfd343e6d9bff63ed992607c0540d759f0a81ca4ab3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>EAST tokamak</topic><topic>fast ions</topic><topic>fast-ion D-alpha spectroscopy</topic><topic>slowing-down regularization</topic><topic>velocity-space tomography</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Madsen, B</creatorcontrib><creatorcontrib>Huang, J</creatorcontrib><creatorcontrib>Salewski, M</creatorcontrib><creatorcontrib>Järleblad, H</creatorcontrib><creatorcontrib>Hansen, P C</creatorcontrib><creatorcontrib>Stagner, L</creatorcontrib><creatorcontrib>Su, J</creatorcontrib><creatorcontrib>Chang, J F</creatorcontrib><creatorcontrib>Fu, J</creatorcontrib><creatorcontrib>Wang, J F</creatorcontrib><creatorcontrib>Liang, L Z</creatorcontrib><creatorcontrib>Zhong, G Q</creatorcontrib><creatorcontrib>Li, Y Y</creatorcontrib><creatorcontrib>Lyu, B</creatorcontrib><creatorcontrib>Liu, H Q</creatorcontrib><creatorcontrib>Zang, Q</creatorcontrib><creatorcontrib>Luo, Z P</creatorcontrib><creatorcontrib>Nocente, M</creatorcontrib><creatorcontrib>Moseev, D</creatorcontrib><creatorcontrib>Fan, T S</creatorcontrib><creatorcontrib>Zhang, Y M</creatorcontrib><creatorcontrib>Yang, D</creatorcontrib><creatorcontrib>Sun, J Q</creatorcontrib><creatorcontrib>Liao, L Y</creatorcontrib><collection>CrossRef</collection><jtitle>Plasma physics and controlled fusion</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Madsen, B</au><au>Huang, J</au><au>Salewski, M</au><au>Järleblad, H</au><au>Hansen, P C</au><au>Stagner, L</au><au>Su, J</au><au>Chang, J F</au><au>Fu, J</au><au>Wang, J F</au><au>Liang, L Z</au><au>Zhong, G Q</au><au>Li, Y Y</au><au>Lyu, B</au><au>Liu, H Q</au><au>Zang, Q</au><au>Luo, Z P</au><au>Nocente, M</au><au>Moseev, D</au><au>Fan, T S</au><au>Zhang, Y M</au><au>Yang, D</au><au>Sun, J Q</au><au>Liao, L Y</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fast-ion velocity-space tomography using slowing-down regularization in EAST plasmas with co- and counter-current neutral beam injection</atitle><jtitle>Plasma physics and controlled fusion</jtitle><stitle>PPCF</stitle><addtitle>Plasma Phys. Control. Fusion</addtitle><date>2020-11-01</date><risdate>2020</risdate><volume>62</volume><issue>11</issue><spage>115019</spage><pages>115019-</pages><issn>0741-3335</issn><eissn>1361-6587</eissn><coden>PLPHBZ</coden><abstract>We demonstrate 2D reconstructions of the fast-ion velocity distribution from two-view fast-ion D-alpha (FIDA) measurements at the EAST tokamak. By expressing the distribution in a basis relying on the fast-ion slowing-down process in fusion plasmas, the smoothness and velocity-space resolution of reconstructions are improved. We reconstruct distributions of fast ions born from simultaneous co- and counter-current neutral beam injection and detect the expected distinct change in fast-ion birth pitch when comparing discharges utilizing different neutral beam injectors. For purely co-current injection, we find a good agreement between TRANSP-predicted and reconstructed fast-ion densities, pressures and current densities for energies above 20 keV. 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| subjects | EAST tokamak fast ions fast-ion D-alpha spectroscopy slowing-down regularization velocity-space tomography |
| title | Fast-ion velocity-space tomography using slowing-down regularization in EAST plasmas with co- and counter-current neutral beam injection |
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