M. Kobayashi, S. Yamoto, K. Hoshino, N. Asakura, Y. Homma, N. Aiba, T. Nakano, R. Sano, G. Kawamura, Y. Hayashi
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As a first attempt, we have selected an L-mode attached discharge #39090 (<i>I</i><sub>p</sub> = 1.6 MA, <i>B</i><sub>t</sub> = 3.1 T, and <i>P</i><sub>NBI</sub> = 4.5 MW), where <span></span><math>\n <semantics>\n <mrow>\n <msub>\n <mover>\n <mi>n</mi>\n <mo>‾</mo>\n </mover>\n <mi>e</mi>\n </msub>\n </mrow>\n <annotation>$$ {\\overline{n}}_e $$</annotation>\n </semantics></math> = 2.08 × 10<sup>19</sup> m<sup>−3</sup>, <span></span><math>\n <semantics>\n <mrow>\n <msub>\n <mover>\n <mi>n</mi>\n <mo>‾</mo>\n </mover>\n <mi>e</mi>\n </msub>\n <mo>/</mo>\n <msub>\n <mi>n</mi>\n <mi>Gr</mi>\n </msub>\n </mrow>\n <annotation>$$ {\\overline{n}}_e/{n}_{Gr} $$</annotation>\n </semantics></math> = 0.392 with deuterium plasmas. It has been found that the peak values of SOL impurity density are reduced by a factor of 2, with the kinetic correction, because the thermal force is reduced by the low collisionality of SOL plasma between the X-point and the (inner and outer) midplane. On the other hand, the profiles near the divertor plates are unaffected by the kinetic correction due to the highly collisional condition. The kinetic correction is found more pronounced for the higher charge states impurity due to the charge dependence of the parallel impurity force balance. Overall effects due to the kinetic correction on the total impurity radiation and the divertor heat load are confirmed to be a few % in the present discharge condition of JT-60U.</p>","PeriodicalId":10700,"journal":{"name":"Contributions to Plasma Physics","volume":"64 7-8","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ctpp.202300141","citationCount":"0","resultStr":"{\"title\":\"SOL impurity transport analysis with SONIC code with a kinetic effect on a thermal force transport model in JT-60U\",\"authors\":\"M. Kobayashi, S. Yamoto, K. Hoshino, N. Asakura, Y. Homma, N. Aiba, T. Nakano, R. Sano, G. Kawamura, Y. Hayashi\",\"doi\":\"10.1002/ctpp.202300141\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The latest version of the SONIC code with the extended thermal force model that is capable to treat collisionality dependence of the force has been applied to the interpretative simulation of L-mode discharge of JT-60 U to investigate the impact of kinetic correction of the thermal force on the scrape-off layer (SOL) plasma properties. As a first attempt, we have selected an L-mode attached discharge #39090 (<i>I</i><sub>p</sub> = 1.6 MA, <i>B</i><sub>t</sub> = 3.1 T, and <i>P</i><sub>NBI</sub> = 4.5 MW), where <span></span><math>\\n <semantics>\\n <mrow>\\n <msub>\\n <mover>\\n <mi>n</mi>\\n <mo>‾</mo>\\n </mover>\\n <mi>e</mi>\\n </msub>\\n </mrow>\\n <annotation>$$ {\\\\overline{n}}_e $$</annotation>\\n </semantics></math> = 2.08 × 10<sup>19</sup> m<sup>−3</sup>, <span></span><math>\\n <semantics>\\n <mrow>\\n <msub>\\n <mover>\\n <mi>n</mi>\\n <mo>‾</mo>\\n </mover>\\n <mi>e</mi>\\n </msub>\\n <mo>/</mo>\\n <msub>\\n <mi>n</mi>\\n <mi>Gr</mi>\\n </msub>\\n </mrow>\\n <annotation>$$ {\\\\overline{n}}_e/{n}_{Gr} $$</annotation>\\n </semantics></math> = 0.392 with deuterium plasmas. 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引用次数: 0
摘要
我们将最新版本的 SONIC 代码与能够处理力的碰撞依赖性的扩展热力模型应用于 JT-60 U 的 L 模式放电解释性模拟，以研究热力的动力学修正对刮除层（SOL）等离子体特性的影响。作为首次尝试，我们选择了一个 L 模式附加放电 #39090 (Ip = 1.6 MA, Bt = 3.1 T, PNBI = 4.5 MW)，其中 n‾e$$ {overline{n}}_e $$ = 2.08 × 1019 m-3, n‾e/nGr$$ {overline{n}}_e/{n}_{Gr} $$ = 0.392 的氘等离子体。研究发现，在进行动力学修正后，SOL 杂质密度的峰值降低了 2 倍，这是因为 SOL 等离子体在 X 点和（内、外）中平面之间的低碰撞性降低了热力。另一方面，由于高度碰撞条件，岔流板附近的剖面不受动力学修正的影响。由于平行杂质力平衡的电荷依赖性，高电荷态杂质的动力学修正更为明显。经证实，在 JT-60U 目前的放电条件下，动力学修正对杂质总辐射和分流器热负荷的总体影响仅为几个百分点。
SOL impurity transport analysis with SONIC code with a kinetic effect on a thermal force transport model in JT-60U
The latest version of the SONIC code with the extended thermal force model that is capable to treat collisionality dependence of the force has been applied to the interpretative simulation of L-mode discharge of JT-60 U to investigate the impact of kinetic correction of the thermal force on the scrape-off layer (SOL) plasma properties. As a first attempt, we have selected an L-mode attached discharge #39090 (Ip = 1.6 MA, Bt = 3.1 T, and PNBI = 4.5 MW), where = 2.08 × 1019 m−3, = 0.392 with deuterium plasmas. It has been found that the peak values of SOL impurity density are reduced by a factor of 2, with the kinetic correction, because the thermal force is reduced by the low collisionality of SOL plasma between the X-point and the (inner and outer) midplane. On the other hand, the profiles near the divertor plates are unaffected by the kinetic correction due to the highly collisional condition. The kinetic correction is found more pronounced for the higher charge states impurity due to the charge dependence of the parallel impurity force balance. Overall effects due to the kinetic correction on the total impurity radiation and the divertor heat load are confirmed to be a few % in the present discharge condition of JT-60U.
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