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Vacuum magnetic flux surface measurements on the SCR-1 Stellarator

机译：SCR-1螺旋液上的真空磁通表面测量

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The Stellarator of Costa Rica 1 (SCR-1), located at the Instituto Tecnológico de Costa Rica, is the first Stellarator of Latin America [1]. In Stellarators, vacuum magnetic flux surfaces are produced only by external coils [2], making respective property measurements possible. Flux surfaces allow the magnetic confinement of plasma, making their characterization important to verify the device's construction. The aim of this work is to present measurements on the flux surfaces in the SCR-1. Mapping of the magnetic surfaces produced in the SCR-1 implied the use of a transparent fluorescent screen covered with ZnO:Zn phosphor which allows the detection of an electron beam, emitted from an electron gun inside the vacuum vessel, that travels around the device following the magnetic field lines. Three highly transparent screens were used: a fixed stainless-steel mesh, an oscillating rod, and an in-house elliptical design called “cuchillo de mantequilla” (butter knife); and results were compared between them. Using the three different methods in the toroidal position 0°, three different nested surfaces were measured. Finally, results were compared with the Poincaré maps from BS-SOLCTRA (Biot-Savart Solver for Compute and Trace Magnetic Fields) and EXTENDER_P (formerly Poincare) codes [3], [4]. The obtained results are consistent with expectations, verifying that the manufacturing process of the coils was handled as designed.
机译：位于InstitoTecnológicodeCostaRICA的哥斯达黎加1（SCR-1）的恒液术是拉丁美洲的第一个恒星[1]。在螺旋液中，真空磁通表面仅由外部线圈[2]产生，使得各种性能测量成为可能。磁通面允许等离子体的磁距离，使其表征重要以验证设备的结构。这项工作的目的是在SCR-1中的磁通表面上呈现测量。 SCR-1中产生的磁表面的映射暗示使用用ZnO：Zn磷光体覆盖的透明荧光屏，其允许检测从真空容器内的电子枪发射的电子束，其围绕器件绕过磁场线。使用了三个高度透明的屏幕：固定的不锈钢网，振荡杆和内部椭圆设计，称为“Cuchillo de Mantequilla”（黄油刀）;并在它们之间比较结果。使用环形位置0°的三种不同的方法，测量三个不同的嵌套表面。最后，将结果与来自BS-Solctra的Poincaré地图（Biot-Savart求解器用于计算和追踪磁场）和Extender_P（以前Poincare）代码[3]，[4]。获得的结果与期望一致，验证线圈的制造过程被设计。

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