Quasi-coherent mode in core plasma of SUNIST spherical tokamak
A quasi-coherent (QC) mode was observed in the core region of low-density ohmic plasmas in Sino-UNIted Spherical Tokamak. In experiments on the QC mode, two sets of moveable Langmuir probes (LPs) were used to measure the local parameters including floating potential, electron temperature, electron d...
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| Veröffentlicht in: | Plasma science & technology 2023-01, Vol.25 (1), p.15103 |
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| creator | LIU, Wenbin WANG, Shouzhi WANG, Binbin SU, Pengjuan CHENG, Zhengbo TAN, Yi GAO, Zhe WAN, Yuanxi GAO, Xiang LIN, Xiaodong HUANG, Jianjun WU, Muquan ZHU, Xiang HAO, Baolong LI, Hang |
| description | A quasi-coherent (QC) mode was observed in the core region of low-density ohmic plasmas in Sino-UNIted Spherical Tokamak. In experiments on the QC mode, two sets of moveable Langmuir probes (LPs) were used to measure the local parameters including floating potential, electron temperature, electron density, and so on, as well as their profiles. To monitor the magnetohydrodynamic activities, a Mirnov probe was used to measure the poloidal magnetic fluctuation. The QC mode can be seen in the spectra of floating potential, but there is no similar peak in the spectra of magnetic fluctuation. Thus, the QC mode is probably electrostatic. By analyzing the electrostatic potential fluctuations from the LPs, the features of the QC mode including frequency, wavenumber, propagation direction, and dependence on collisionality are identified, which are consistent with the characteristics of dissipative trapped electron mode. |
| doi_str_mv | 10.1088/2058-6272/ac85a3 |
| format | Article |
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In experiments on the QC mode, two sets of moveable Langmuir probes (LPs) were used to measure the local parameters including floating potential, electron temperature, electron density, and so on, as well as their profiles. To monitor the magnetohydrodynamic activities, a Mirnov probe was used to measure the poloidal magnetic fluctuation. The QC mode can be seen in the spectra of floating potential, but there is no similar peak in the spectra of magnetic fluctuation. Thus, the QC mode is probably electrostatic. 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Technol</addtitle><description>A quasi-coherent (QC) mode was observed in the core region of low-density ohmic plasmas in Sino-UNIted Spherical Tokamak. In experiments on the QC mode, two sets of moveable Langmuir probes (LPs) were used to measure the local parameters including floating potential, electron temperature, electron density, and so on, as well as their profiles. To monitor the magnetohydrodynamic activities, a Mirnov probe was used to measure the poloidal magnetic fluctuation. The QC mode can be seen in the spectra of floating potential, but there is no similar peak in the spectra of magnetic fluctuation. Thus, the QC mode is probably electrostatic. By analyzing the electrostatic potential fluctuations from the LPs, the features of the QC mode including frequency, wavenumber, propagation direction, and dependence on collisionality are identified, which are consistent with the characteristics of dissipative trapped electron mode.</description><subject>dissipative trapped electron mode (DTEM)</subject><subject>quasi-coherent (QC) mode</subject><subject>spherical tokamak</subject><subject>turbulence</subject><issn>1009-0630</issn><issn>2058-6272</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNp1j81LAzEQxYMoWKt3j7l5ce0k2WSzF0GKH4WiSNtzGLMJbtttlmR78L83peJJmYGB4b3H-xFyzeCOgdYTDlIXild8glZLFCdk9Ps6JSMGUBegBJyTi5TWALKstRiR-_c9praw4dNFtxtoFxpH2x21ITrabzF1SIOni9XrbLGkqc-y1uKWDmGDHW4uyZnHbXJXP3dMVk-Py-lLMX97nk0f5oXlvBoKx52XWlSls1K6Mk9eISstfI26xrJSKEpfMoel4FK45gOVasCp7FSeiTGBY66NIaXovOlj22H8MgzMgd8cYM0B1hz5s-XmaGlDb9ZhH3e5oOnTYLg0zACTDITpG5-Vt38o_w3-Bhd2aNo</recordid><startdate>20230101</startdate><enddate>20230101</enddate><creator>LIU, Wenbin</creator><creator>WANG, Shouzhi</creator><creator>WANG, Binbin</creator><creator>SU, Pengjuan</creator><creator>CHENG, Zhengbo</creator><creator>TAN, Yi</creator><creator>GAO, Zhe</creator><creator>WAN, Yuanxi</creator><creator>GAO, Xiang</creator><creator>LIN, Xiaodong</creator><creator>HUANG, Jianjun</creator><creator>WU, Muquan</creator><creator>ZHU, Xiang</creator><creator>HAO, Baolong</creator><creator>LI, Hang</creator><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0003-1042-4117</orcidid></search><sort><creationdate>20230101</creationdate><title>Quasi-coherent mode in core plasma of SUNIST spherical tokamak</title><author>LIU, Wenbin ; WANG, Shouzhi ; WANG, Binbin ; SU, Pengjuan ; CHENG, Zhengbo ; TAN, Yi ; GAO, Zhe ; WAN, Yuanxi ; GAO, Xiang ; LIN, Xiaodong ; HUANG, Jianjun ; WU, Muquan ; ZHU, Xiang ; HAO, Baolong ; LI, Hang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c227t-e2ef58374ec55e4e4ee4e35783f9a89a476a34f41ea43253edba66d0e6e2e6f13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>dissipative trapped electron mode (DTEM)</topic><topic>quasi-coherent (QC) mode</topic><topic>spherical tokamak</topic><topic>turbulence</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>LIU, Wenbin</creatorcontrib><creatorcontrib>WANG, Shouzhi</creatorcontrib><creatorcontrib>WANG, Binbin</creatorcontrib><creatorcontrib>SU, Pengjuan</creatorcontrib><creatorcontrib>CHENG, Zhengbo</creatorcontrib><creatorcontrib>TAN, Yi</creatorcontrib><creatorcontrib>GAO, Zhe</creatorcontrib><creatorcontrib>WAN, Yuanxi</creatorcontrib><creatorcontrib>GAO, Xiang</creatorcontrib><creatorcontrib>LIN, Xiaodong</creatorcontrib><creatorcontrib>HUANG, Jianjun</creatorcontrib><creatorcontrib>WU, Muquan</creatorcontrib><creatorcontrib>ZHU, Xiang</creatorcontrib><creatorcontrib>HAO, Baolong</creatorcontrib><creatorcontrib>LI, Hang</creatorcontrib><collection>CrossRef</collection><jtitle>Plasma science & technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>LIU, Wenbin</au><au>WANG, Shouzhi</au><au>WANG, Binbin</au><au>SU, Pengjuan</au><au>CHENG, Zhengbo</au><au>TAN, Yi</au><au>GAO, Zhe</au><au>WAN, Yuanxi</au><au>GAO, Xiang</au><au>LIN, Xiaodong</au><au>HUANG, Jianjun</au><au>WU, Muquan</au><au>ZHU, Xiang</au><au>HAO, Baolong</au><au>LI, Hang</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Quasi-coherent mode in core plasma of SUNIST spherical tokamak</atitle><jtitle>Plasma science & technology</jtitle><stitle>PST</stitle><addtitle>Plasma Sci. Technol</addtitle><date>2023-01-01</date><risdate>2023</risdate><volume>25</volume><issue>1</issue><spage>15103</spage><pages>15103-</pages><issn>1009-0630</issn><eissn>2058-6272</eissn><coden>PSTHC3</coden><abstract>A quasi-coherent (QC) mode was observed in the core region of low-density ohmic plasmas in Sino-UNIted Spherical Tokamak. In experiments on the QC mode, two sets of moveable Langmuir probes (LPs) were used to measure the local parameters including floating potential, electron temperature, electron density, and so on, as well as their profiles. To monitor the magnetohydrodynamic activities, a Mirnov probe was used to measure the poloidal magnetic fluctuation. The QC mode can be seen in the spectra of floating potential, but there is no similar peak in the spectra of magnetic fluctuation. Thus, the QC mode is probably electrostatic. By analyzing the electrostatic potential fluctuations from the LPs, the features of the QC mode including frequency, wavenumber, propagation direction, and dependence on collisionality are identified, which are consistent with the characteristics of dissipative trapped electron mode.</abstract><pub>IOP Publishing</pub><doi>10.1088/2058-6272/ac85a3</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0003-1042-4117</orcidid></addata></record> |
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| source | Institute of Physics Journals |
| subjects | dissipative trapped electron mode (DTEM) quasi-coherent (QC) mode spherical tokamak turbulence |
| title | Quasi-coherent mode in core plasma of SUNIST spherical tokamak |
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