The impact of toroidal mode coupling on high-density discharges in J-TEXT
Density limit has long been a widely studied issue influencing the operating range of tokamaks. The rapid growth of the m / n = 2/1 (where m and n are poloidal and toroidal mode numbers, respectively) tearing mode is generally regarded as a primary precursor to the density limit disruption. In this...
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| Veröffentlicht in: | Plasma science & technology 2024-12, Vol.26 (12), p.125101 |
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| creator | DENG, Peng MAO, Wenzhe CHEN, Zhipeng ZHOU, Yinan SHI, Peng YANG, Zhoujun GAO, Li LAN, Tao XIE, Jinlin LI, Hong WEI, Zian LIU, Adi ZHOU, Chu DING, Weixing LIU, Wandong ZHUANG, Ge |
| description | Density limit has long been a widely studied issue influencing the operating range of tokamaks. The rapid growth of the m / n = 2/1 (where m and n are poloidal and toroidal mode numbers, respectively) tearing mode is generally regarded as a primary precursor to the density limit disruption. In this experiment, the coupling of the m / n = 1/1 mode and the m / n = 2/1 mode in high-density plasma was observed. During a sawtooth cycle, the frequencies of the two modes gradually converge until they become equal. After that, toroidal coupling occurs between the 1/1 and 2/1 modes, resulting in a mutually fixed phase relationship. With the occurrence of toroidal coupling, the 2/1 mode is stabilized. Prior to the disruption, the cessation of the 1/1 and 2/1 mode coupling, along with the rapid growth in the amplitude of the 2/1 mode, can be observed. Additionally, under the same parameters, comparing discharges with or without the 1/1 mode, it is found that the presence of the 1/1 mode leads to higher plasma density and temperature parameters. |
| doi_str_mv | 10.1088/2058-6272/ad659f |
| format | Article |
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The rapid growth of the m / n = 2/1 (where m and n are poloidal and toroidal mode numbers, respectively) tearing mode is generally regarded as a primary precursor to the density limit disruption. In this experiment, the coupling of the m / n = 1/1 mode and the m / n = 2/1 mode in high-density plasma was observed. During a sawtooth cycle, the frequencies of the two modes gradually converge until they become equal. After that, toroidal coupling occurs between the 1/1 and 2/1 modes, resulting in a mutually fixed phase relationship. With the occurrence of toroidal coupling, the 2/1 mode is stabilized. Prior to the disruption, the cessation of the 1/1 and 2/1 mode coupling, along with the rapid growth in the amplitude of the 2/1 mode, can be observed. Additionally, under the same parameters, comparing discharges with or without the 1/1 mode, it is found that the presence of the 1/1 mode leads to higher plasma density and temperature parameters.</description><identifier>ISSN: 1009-0630</identifier><identifier>DOI: 10.1088/2058-6272/ad659f</identifier><language>eng</language><publisher>Plasma Science and Technology</publisher><subject>density limit ; sawtooth ; tearing mode ; toroidal coupling</subject><ispartof>Plasma science & technology, 2024-12, Vol.26 (12), p.125101</ispartof><rights>2024 Hefei Institutes of Physical Science, Chinese Academy of Sciences and IOP Publishing Printed in China</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c163t-28557e60f6dddc66b81b38cf6890d206545127bd8b5a16c8c2e38b31bdc409aa3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/2058-6272/ad659f/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>315,781,785,27926,27927,53848</link.rule.ids></links><search><creatorcontrib>DENG, Peng</creatorcontrib><creatorcontrib>MAO, Wenzhe</creatorcontrib><creatorcontrib>CHEN, Zhipeng</creatorcontrib><creatorcontrib>ZHOU, Yinan</creatorcontrib><creatorcontrib>SHI, Peng</creatorcontrib><creatorcontrib>YANG, Zhoujun</creatorcontrib><creatorcontrib>GAO, Li</creatorcontrib><creatorcontrib>LAN, Tao</creatorcontrib><creatorcontrib>XIE, Jinlin</creatorcontrib><creatorcontrib>LI, Hong</creatorcontrib><creatorcontrib>WEI, Zian</creatorcontrib><creatorcontrib>LIU, Adi</creatorcontrib><creatorcontrib>ZHOU, Chu</creatorcontrib><creatorcontrib>DING, Weixing</creatorcontrib><creatorcontrib>LIU, Wandong</creatorcontrib><creatorcontrib>ZHUANG, Ge</creatorcontrib><title>The impact of toroidal mode coupling on high-density discharges in J-TEXT</title><title>Plasma science & technology</title><addtitle>Plasma Sci. Technol</addtitle><description>Density limit has long been a widely studied issue influencing the operating range of tokamaks. The rapid growth of the m / n = 2/1 (where m and n are poloidal and toroidal mode numbers, respectively) tearing mode is generally regarded as a primary precursor to the density limit disruption. In this experiment, the coupling of the m / n = 1/1 mode and the m / n = 2/1 mode in high-density plasma was observed. During a sawtooth cycle, the frequencies of the two modes gradually converge until they become equal. After that, toroidal coupling occurs between the 1/1 and 2/1 modes, resulting in a mutually fixed phase relationship. With the occurrence of toroidal coupling, the 2/1 mode is stabilized. Prior to the disruption, the cessation of the 1/1 and 2/1 mode coupling, along with the rapid growth in the amplitude of the 2/1 mode, can be observed. Additionally, under the same parameters, comparing discharges with or without the 1/1 mode, it is found that the presence of the 1/1 mode leads to higher plasma density and temperature parameters.</description><subject>density limit</subject><subject>sawtooth</subject><subject>tearing mode</subject><subject>toroidal coupling</subject><issn>1009-0630</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNp1j71OwzAYRT2ARCnsjH4ATD_bteuMqCpQVIklSGyW_9K4SuLIToe-Pa3KynSXe67uQeiJwgsFpRYMhCKSrdjCeCmq5gbNKEBFQHK4Q_elHADEslJ8hrZ1G3DsR-MmnBo8pZyiNx3ukw_YpePYxWGP04DbuG-JD0OJ0wn7WFxr8j4UHAf8SerNT_2AbhvTlfD4l3P0_bap1x9k9_W-Xb_uiKOST4QpIVZBQiO9905Kq6jlyjVSVeAZSLEUlK2sV1YYKp1yLHBlObXeLaEyhs8RXHddTqXk0Ogxx97kk6agL_r6oq8v-vqqf0aer0hMoz6kYx7OB_-v_wLR3V1d</recordid><startdate>20241201</startdate><enddate>20241201</enddate><creator>DENG, Peng</creator><creator>MAO, Wenzhe</creator><creator>CHEN, Zhipeng</creator><creator>ZHOU, Yinan</creator><creator>SHI, Peng</creator><creator>YANG, Zhoujun</creator><creator>GAO, Li</creator><creator>LAN, Tao</creator><creator>XIE, Jinlin</creator><creator>LI, Hong</creator><creator>WEI, Zian</creator><creator>LIU, Adi</creator><creator>ZHOU, Chu</creator><creator>DING, Weixing</creator><creator>LIU, Wandong</creator><creator>ZHUANG, Ge</creator><general>Plasma Science and Technology</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20241201</creationdate><title>The impact of toroidal mode coupling on high-density discharges in J-TEXT</title><author>DENG, Peng ; MAO, Wenzhe ; CHEN, Zhipeng ; ZHOU, Yinan ; SHI, Peng ; YANG, Zhoujun ; GAO, Li ; LAN, Tao ; XIE, Jinlin ; LI, Hong ; WEI, Zian ; LIU, Adi ; ZHOU, Chu ; DING, Weixing ; LIU, Wandong ; ZHUANG, Ge</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c163t-28557e60f6dddc66b81b38cf6890d206545127bd8b5a16c8c2e38b31bdc409aa3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>density limit</topic><topic>sawtooth</topic><topic>tearing mode</topic><topic>toroidal coupling</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>DENG, Peng</creatorcontrib><creatorcontrib>MAO, Wenzhe</creatorcontrib><creatorcontrib>CHEN, Zhipeng</creatorcontrib><creatorcontrib>ZHOU, Yinan</creatorcontrib><creatorcontrib>SHI, Peng</creatorcontrib><creatorcontrib>YANG, Zhoujun</creatorcontrib><creatorcontrib>GAO, Li</creatorcontrib><creatorcontrib>LAN, Tao</creatorcontrib><creatorcontrib>XIE, Jinlin</creatorcontrib><creatorcontrib>LI, Hong</creatorcontrib><creatorcontrib>WEI, Zian</creatorcontrib><creatorcontrib>LIU, Adi</creatorcontrib><creatorcontrib>ZHOU, Chu</creatorcontrib><creatorcontrib>DING, Weixing</creatorcontrib><creatorcontrib>LIU, Wandong</creatorcontrib><creatorcontrib>ZHUANG, Ge</creatorcontrib><collection>CrossRef</collection><jtitle>Plasma science & technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>DENG, Peng</au><au>MAO, Wenzhe</au><au>CHEN, Zhipeng</au><au>ZHOU, Yinan</au><au>SHI, Peng</au><au>YANG, Zhoujun</au><au>GAO, Li</au><au>LAN, Tao</au><au>XIE, Jinlin</au><au>LI, Hong</au><au>WEI, Zian</au><au>LIU, Adi</au><au>ZHOU, Chu</au><au>DING, Weixing</au><au>LIU, Wandong</au><au>ZHUANG, Ge</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The impact of toroidal mode coupling on high-density discharges in J-TEXT</atitle><jtitle>Plasma science & technology</jtitle><addtitle>Plasma Sci. Technol</addtitle><date>2024-12-01</date><risdate>2024</risdate><volume>26</volume><issue>12</issue><spage>125101</spage><pages>125101-</pages><issn>1009-0630</issn><abstract>Density limit has long been a widely studied issue influencing the operating range of tokamaks. The rapid growth of the m / n = 2/1 (where m and n are poloidal and toroidal mode numbers, respectively) tearing mode is generally regarded as a primary precursor to the density limit disruption. In this experiment, the coupling of the m / n = 1/1 mode and the m / n = 2/1 mode in high-density plasma was observed. During a sawtooth cycle, the frequencies of the two modes gradually converge until they become equal. After that, toroidal coupling occurs between the 1/1 and 2/1 modes, resulting in a mutually fixed phase relationship. With the occurrence of toroidal coupling, the 2/1 mode is stabilized. Prior to the disruption, the cessation of the 1/1 and 2/1 mode coupling, along with the rapid growth in the amplitude of the 2/1 mode, can be observed. Additionally, under the same parameters, comparing discharges with or without the 1/1 mode, it is found that the presence of the 1/1 mode leads to higher plasma density and temperature parameters.</abstract><pub>Plasma Science and Technology</pub><doi>10.1088/2058-6272/ad659f</doi><tpages>8</tpages></addata></record> |
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| subjects | density limit sawtooth tearing mode toroidal coupling |
| title | The impact of toroidal mode coupling on high-density discharges in J-TEXT |
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