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Observation of self-organized FRC formation in a collisional-merging experiment
Nuclear Fusion ( IF 3.3 ) Pub Date : 2021-08-13 , DOI: 10.1088/1741-4326/ac189c
Tomohiko Asai 1 , Daichi Kobayashi 1 , Taichi Seki 1 , Yasuaki Tamura 1 , Tatsuhiro Watanabe 1 , Naoto Sahara 1 , Tsutomu Takahashi 1 , Jordan Morelli 1, 2 , Hiroshi Gota 3 , Thomas Roche 3 , Richard Magee 3 , Michl Binderbauer 3 , Toshiki Tajima 3, 4 , Michiaki Inomoto 5 , Toshiki Takahashi 6
Affiliation  

Self-organized field-reversed configuration (FRC)-like formation was observed after the super-sonic/Alfvnic collisional merging of two FRCs in the FAT-CM device at Nihon University. In this experiment, two FRCs were generated initially in two separate field-reversed theta-pinch type formation regions. Those two formation regions are coaxially connected to opposite ends of a cylindrical confinement chamber. The formed FRCs are oppositely-translated and collide in the middle of the confinement chamber at super-sonic/Alfvnic velocity. During the collision, the merged plasmoid experiences destructive disturbance and loses its fast toroidal flow and characteristic FRC property of having a field-reversed magnetic configuration to become a magnetized plasma without ordered structure. After this dynamic collision, a magnetic configuration of FRC with fast toroidal rotation is self-organized within a few tens of microseconds. This observation indicates robustness of the extremely high-beta, simple magnetic configuration.



中文翻译:

在碰撞合并实验中观察自组织 FRC 的形成

在日本大学的 FAT-CM 设备中,两个 FRC 的超音速/Alfvnic 碰撞合并后观察到自组织场反转配置 (FRC) 样形成。在这个实验中,两个 FRC 最初是在两个独立的场反转 theta-pinch 类型地层区域中生成的。这两个形成区域同轴连接到圆柱形限制室的相对端。形成的 FRC 以超音速/阿尔夫尼速度在禁闭室中间发生相反的平移和碰撞。在碰撞过程中,合并的等离子体团经历破坏性扰动并失去其快速环形流动和具有场反转磁构型的特征性 FRC 特性,成为没有有序结构的磁化等离子体。在这次动态碰撞之后,具有快速环形旋转的 FRC 磁性配置在几十微秒内自组织。这一观察表明极高β、简单磁性配置的稳健性。

更新日期:2021-08-13
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