Evgeniy A. Shmigelsky, Andrej A. Lizunov, Andrey K. Meyster, Egor I. Pinzhenin, Alexander L. Solomakhin, Dmitry V. Yakovlev
{"title":"气体动力陷阱中高β等离子体约束研究的最新成果","authors":"Evgeniy A. Shmigelsky, Andrej A. Lizunov, Andrey K. Meyster, Egor I. Pinzhenin, Alexander L. Solomakhin, Dmitry V. Yakovlev","doi":"10.1017/s0022377824000515","DOIUrl":null,"url":null,"abstract":"This paper is devoted to experimental studies of plasma confinement with high relative pressure (<jats:inline-formula> <jats:alternatives> <jats:tex-math>$\\beta$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mime-subtype=\"png\" xlink:href=\"S0022377824000515_inline2.png\"/> </jats:alternatives> </jats:inline-formula>) in the Gas Dynamic Trap (BINP, Novosibirsk). In previous high-<jats:inline-formula> <jats:alternatives> <jats:tex-math>$\\beta$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mime-subtype=\"png\" xlink:href=\"S0022377824000515_inline3.png\"/> </jats:alternatives> </jats:inline-formula> confinement studies a maximum local <jats:inline-formula> <jats:alternatives> <jats:tex-math>$\\beta = 0.6$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mime-subtype=\"png\" xlink:href=\"S0022377824000515_inline4.png\"/> </jats:alternatives> </jats:inline-formula> was achieved in the fast-ion turning point, contributed to by a beam-driven population of fast ions with an anisotropic distribution function. In this study the axial magnetic field profile was modified to bring the turning points closer to one another, which effectively increased the energy density of plasma and pushed the <jats:inline-formula> <jats:alternatives> <jats:tex-math>$\\beta$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mime-subtype=\"png\" xlink:href=\"S0022377824000515_inline5.png\"/> </jats:alternatives> </jats:inline-formula> value higher. Experiments were performed for two non-standard magnetic configurations, where the axial fast-ion confinement region length was reduced by 1.5 and 2 times compared with the standard configuration. The average values of <jats:inline-formula> <jats:alternatives> <jats:tex-math>$\\langle \\beta _{\\perp } \\rangle$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mime-subtype=\"png\" xlink:href=\"S0022377824000515_inline6.png\"/> </jats:alternatives> </jats:inline-formula> over the plasma central cross-section were found to be 0.1 and 0.18, respectively, for the two configurations, with the latter value significantly exceeding the <jats:inline-formula> <jats:alternatives> <jats:tex-math>$\\langle \\beta _{\\perp } \\rangle =0.08$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\"http://www.w3.org/1999/xlink\" mime-subtype=\"png\" xlink:href=\"S0022377824000515_inline7.png\"/> </jats:alternatives> </jats:inline-formula> of the standard configuration, in which the previous record was set. Moreover, halving the fast ion confinement region almost doubled the D–D fusion proton flux from the trap centre compared with the standard configuration. The electron temperature in both new magnetic configurations was only slightly smaller than in the standard configuration. In addition, an effect of Alfvén ion–cyclotron instability (AICI) development on the pressure in the turning points is discussed. Presumably, with some decrease in magnetic field an evolving AICI does not result in considerable pressure axial redistribution, so the pressure maximum is in the turning points’ vicinity despite the instability.","PeriodicalId":16846,"journal":{"name":"Journal of Plasma Physics","volume":"35 1","pages":""},"PeriodicalIF":2.1000,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Recent results on high-β plasma confinement studies in the Gas Dynamic Trap\",\"authors\":\"Evgeniy A. Shmigelsky, Andrej A. Lizunov, Andrey K. Meyster, Egor I. Pinzhenin, Alexander L. Solomakhin, Dmitry V. Yakovlev\",\"doi\":\"10.1017/s0022377824000515\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper is devoted to experimental studies of plasma confinement with high relative pressure (<jats:inline-formula> <jats:alternatives> <jats:tex-math>$\\\\beta$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\\\"http://www.w3.org/1999/xlink\\\" mime-subtype=\\\"png\\\" xlink:href=\\\"S0022377824000515_inline2.png\\\"/> </jats:alternatives> </jats:inline-formula>) in the Gas Dynamic Trap (BINP, Novosibirsk). In previous high-<jats:inline-formula> <jats:alternatives> <jats:tex-math>$\\\\beta$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\\\"http://www.w3.org/1999/xlink\\\" mime-subtype=\\\"png\\\" xlink:href=\\\"S0022377824000515_inline3.png\\\"/> </jats:alternatives> </jats:inline-formula> confinement studies a maximum local <jats:inline-formula> <jats:alternatives> <jats:tex-math>$\\\\beta = 0.6$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\\\"http://www.w3.org/1999/xlink\\\" mime-subtype=\\\"png\\\" xlink:href=\\\"S0022377824000515_inline4.png\\\"/> </jats:alternatives> </jats:inline-formula> was achieved in the fast-ion turning point, contributed to by a beam-driven population of fast ions with an anisotropic distribution function. In this study the axial magnetic field profile was modified to bring the turning points closer to one another, which effectively increased the energy density of plasma and pushed the <jats:inline-formula> <jats:alternatives> <jats:tex-math>$\\\\beta$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\\\"http://www.w3.org/1999/xlink\\\" mime-subtype=\\\"png\\\" xlink:href=\\\"S0022377824000515_inline5.png\\\"/> </jats:alternatives> </jats:inline-formula> value higher. Experiments were performed for two non-standard magnetic configurations, where the axial fast-ion confinement region length was reduced by 1.5 and 2 times compared with the standard configuration. The average values of <jats:inline-formula> <jats:alternatives> <jats:tex-math>$\\\\langle \\\\beta _{\\\\perp } \\\\rangle$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\\\"http://www.w3.org/1999/xlink\\\" mime-subtype=\\\"png\\\" xlink:href=\\\"S0022377824000515_inline6.png\\\"/> </jats:alternatives> </jats:inline-formula> over the plasma central cross-section were found to be 0.1 and 0.18, respectively, for the two configurations, with the latter value significantly exceeding the <jats:inline-formula> <jats:alternatives> <jats:tex-math>$\\\\langle \\\\beta _{\\\\perp } \\\\rangle =0.08$</jats:tex-math> <jats:inline-graphic xmlns:xlink=\\\"http://www.w3.org/1999/xlink\\\" mime-subtype=\\\"png\\\" xlink:href=\\\"S0022377824000515_inline7.png\\\"/> </jats:alternatives> </jats:inline-formula> of the standard configuration, in which the previous record was set. Moreover, halving the fast ion confinement region almost doubled the D–D fusion proton flux from the trap centre compared with the standard configuration. The electron temperature in both new magnetic configurations was only slightly smaller than in the standard configuration. In addition, an effect of Alfvén ion–cyclotron instability (AICI) development on the pressure in the turning points is discussed. Presumably, with some decrease in magnetic field an evolving AICI does not result in considerable pressure axial redistribution, so the pressure maximum is in the turning points’ vicinity despite the instability.\",\"PeriodicalId\":16846,\"journal\":{\"name\":\"Journal of Plasma Physics\",\"volume\":\"35 1\",\"pages\":\"\"},\"PeriodicalIF\":2.1000,\"publicationDate\":\"2024-05-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Plasma Physics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://doi.org/10.1017/s0022377824000515\",\"RegionNum\":3,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, FLUIDS & PLASMAS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Plasma Physics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1017/s0022377824000515","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, FLUIDS & PLASMAS","Score":null,"Total":0}
Recent results on high-β plasma confinement studies in the Gas Dynamic Trap
This paper is devoted to experimental studies of plasma confinement with high relative pressure ($\beta$) in the Gas Dynamic Trap (BINP, Novosibirsk). In previous high-$\beta$ confinement studies a maximum local $\beta = 0.6$ was achieved in the fast-ion turning point, contributed to by a beam-driven population of fast ions with an anisotropic distribution function. In this study the axial magnetic field profile was modified to bring the turning points closer to one another, which effectively increased the energy density of plasma and pushed the $\beta$ value higher. Experiments were performed for two non-standard magnetic configurations, where the axial fast-ion confinement region length was reduced by 1.5 and 2 times compared with the standard configuration. The average values of $\langle \beta _{\perp } \rangle$ over the plasma central cross-section were found to be 0.1 and 0.18, respectively, for the two configurations, with the latter value significantly exceeding the $\langle \beta _{\perp } \rangle =0.08$ of the standard configuration, in which the previous record was set. Moreover, halving the fast ion confinement region almost doubled the D–D fusion proton flux from the trap centre compared with the standard configuration. The electron temperature in both new magnetic configurations was only slightly smaller than in the standard configuration. In addition, an effect of Alfvén ion–cyclotron instability (AICI) development on the pressure in the turning points is discussed. Presumably, with some decrease in magnetic field an evolving AICI does not result in considerable pressure axial redistribution, so the pressure maximum is in the turning points’ vicinity despite the instability.
期刊介绍:
JPP aspires to be the intellectual home of those who think of plasma physics as a fundamental discipline. The journal focuses on publishing research on laboratory plasmas (including magnetically confined and inertial fusion plasmas), space physics and plasma astrophysics that takes advantage of the rapid ongoing progress in instrumentation and computing to advance fundamental understanding of multiscale plasma physics. The Journal welcomes submissions of analytical, numerical, observational and experimental work: both original research and tutorial- or review-style papers, as well as proposals for its Lecture Notes series.