MHD stability of negative triangularity DIII-D plasmas
Negative triangularity (NT) experiments in DIII-D point to an emergent reactor scenario free of sawteeth, endowed with benign, nondisruptive n = 2 tearing modes, which experience q min ⩾ 1 similar to the positive triangularity hybrid scenario. Plasmas exhibiting this behavior attain β N > 3 , hig...
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| Veröffentlicht in: | Nuclear fusion 2023-08, Vol.63 (8), p.86007 |
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| container_title | Nuclear fusion |
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| creator | Boyes, W. Turco, F. Hanson, J. Marinoni, A. Turnbull, A. Austin, M. Navratil, G. |
| description | Negative triangularity (NT) experiments in DIII-D point to an emergent reactor scenario free of sawteeth, endowed with benign, nondisruptive
n
= 2 tearing modes, which experience
q
min
⩾
1 similar to the positive triangularity hybrid scenario. Plasmas exhibiting this behavior attain
β
N
>
3
, high enough to reconsider long held views of NT stability. Ideal MHD and tearing stability analysis of well-diagnosed equilibrium reconstructions of experimental hybrid-like plasmas predict that among shape parameters, MHD stability limits are only sensitive to average triangularity. Operation is predicted to be possible at
β
N
relevant to upcoming tokamaks and commercial NT reactors. |
| doi_str_mv | 10.1088/1741-4326/acd564 |
| format | Article |
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n
= 2 tearing modes, which experience
q
min
⩾
1 similar to the positive triangularity hybrid scenario. Plasmas exhibiting this behavior attain
β
N
>
3
, high enough to reconsider long held views of NT stability. Ideal MHD and tearing stability analysis of well-diagnosed equilibrium reconstructions of experimental hybrid-like plasmas predict that among shape parameters, MHD stability limits are only sensitive to average triangularity. Operation is predicted to be possible at
β
N
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n
= 2 tearing modes, which experience
q
min
⩾
1 similar to the positive triangularity hybrid scenario. Plasmas exhibiting this behavior attain
β
N
>
3
, high enough to reconsider long held views of NT stability. Ideal MHD and tearing stability analysis of well-diagnosed equilibrium reconstructions of experimental hybrid-like plasmas predict that among shape parameters, MHD stability limits are only sensitive to average triangularity. Operation is predicted to be possible at
β
N
relevant to upcoming tokamaks and commercial NT reactors.</description><subject>MHD</subject><subject>negative triangularity</subject><subject>scenarios</subject><subject>tearing modes</subject><issn>0029-5515</issn><issn>1741-4326</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>O3W</sourceid><sourceid>DOA</sourceid><recordid>eNp1kE1LwzAYx4MoOKd3j8WzdXlvchTnS2HiRc8hyZKZ0TUjyYR9e1sr3jw98H974AfANYJ3CAqxQA1FNSWYL7RdM05PwOxPOgUzCLGsGUPsHFzkvIUQUUTIDPDXl2WVizahC-VYRV_1bqNL-HJVSUH3m0On0-gs27atl9W-03mn8yU487rL7ur3zsHH0-P7w0u9entuH-5XtaWIlZoLoqWhUhspDTHcMETF2kGJJaMUG0wMwYPfUG-d0JIOIca98A4jya0kc9BOu-uot2qfwk6no4o6qB8hpo3SqQTbOaUR9gZhxyljlFAvoJUMYisYsk1Dx62baSvmElS2oTj7aWPfO1sUkg1pMBlCcArZFHNOzv89RVCNoNVIVY1U1QR6qNxOlRD3ahsPqR-I_B__Bt_Qe5M</recordid><startdate>20230801</startdate><enddate>20230801</enddate><creator>Boyes, W.</creator><creator>Turco, F.</creator><creator>Hanson, J.</creator><creator>Marinoni, A.</creator><creator>Turnbull, A.</creator><creator>Austin, M.</creator><creator>Navratil, G.</creator><general>IOP Publishing</general><scope>O3W</scope><scope>TSCCA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0002-6930-4702</orcidid><orcidid>https://orcid.org/0000-0003-2432-4870</orcidid><orcidid>https://orcid.org/0000-0002-2930-5196</orcidid><orcidid>https://orcid.org/0000-0003-1004-5782</orcidid><orcidid>https://orcid.org/0000-0002-3723-0438</orcidid><orcidid>https://orcid.org/0000-0002-0017-8605</orcidid><orcidid>https://orcid.org/0000000269304702</orcidid><orcidid>https://orcid.org/0000000237230438</orcidid><orcidid>https://orcid.org/0000000229305196</orcidid><orcidid>https://orcid.org/0000000324324870</orcidid></search><sort><creationdate>20230801</creationdate><title>MHD stability of negative triangularity DIII-D plasmas</title><author>Boyes, W. ; Turco, F. ; Hanson, J. ; Marinoni, A. ; Turnbull, A. ; Austin, M. ; Navratil, G.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c415t-683a9b49ab99b3b6b5148de09295442b23b32b4974fce8a94b3b56f8fe2196c93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>MHD</topic><topic>negative triangularity</topic><topic>scenarios</topic><topic>tearing modes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Boyes, W.</creatorcontrib><creatorcontrib>Turco, F.</creatorcontrib><creatorcontrib>Hanson, J.</creatorcontrib><creatorcontrib>Marinoni, A.</creatorcontrib><creatorcontrib>Turnbull, A.</creatorcontrib><creatorcontrib>Austin, M.</creatorcontrib><creatorcontrib>Navratil, G.</creatorcontrib><collection>IOP Publishing Free Content</collection><collection>IOPscience (Open Access)</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>Nuclear fusion</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Boyes, W.</au><au>Turco, F.</au><au>Hanson, J.</au><au>Marinoni, A.</au><au>Turnbull, A.</au><au>Austin, M.</au><au>Navratil, G.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>MHD stability of negative triangularity DIII-D plasmas</atitle><jtitle>Nuclear fusion</jtitle><stitle>NF</stitle><addtitle>Nucl. Fusion</addtitle><date>2023-08-01</date><risdate>2023</risdate><volume>63</volume><issue>8</issue><spage>86007</spage><pages>86007-</pages><issn>0029-5515</issn><eissn>1741-4326</eissn><coden>NUFUAU</coden><abstract>Negative triangularity (NT) experiments in DIII-D point to an emergent reactor scenario free of sawteeth, endowed with benign, nondisruptive
n
= 2 tearing modes, which experience
q
min
⩾
1 similar to the positive triangularity hybrid scenario. Plasmas exhibiting this behavior attain
β
N
>
3
, high enough to reconsider long held views of NT stability. Ideal MHD and tearing stability analysis of well-diagnosed equilibrium reconstructions of experimental hybrid-like plasmas predict that among shape parameters, MHD stability limits are only sensitive to average triangularity. Operation is predicted to be possible at
β
N
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| language | eng |
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| subjects | MHD negative triangularity scenarios tearing modes |
| title | MHD stability of negative triangularity DIII-D plasmas |
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