Construction concepts and validation of the 3D printed UST_2 modular stellarator

15th Latin American Workshop on Plasma Physics; 21st IAEA TM on Research Using Small Fusion Devices

Queral, V.^1

Laboratory Nacional de Fusión, CIEMAT, Madrid

28040, Spain^1

关键词: Fabrication method;    Geometric complexity;    High-accuracy;    Manufacturing methods;    Modular coils;    Plasma volume;    Positioning accuracy;    Truss structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/591/1/012015/pdf
DOI  :  10.1088/1742-6596/591/1/012015

来源: IOP

【 摘 要 】

High accuracy, geometric complexity and thus high cost of stellarators tend to hinder the advance of stellarator research. Nowadays, new manufacturing methods might be developed for the production of small and middle-size stellarators. The methods should demonstrate advantages with respect common fabrication methods, like casting, cutting, forging and welding, for the construction of advanced highly convoluted modular stellarators. UST-2 is a small modular three period quasi-isodynamic stellarator of major radius 0.26 m and plasma volume 10 litres being currently built to validate additive manufacturing (3D printing) for stellarator construction. The modular coils are wound in grooves defined on six 3D printed half period frames designed as light truss structures filled by a strong filler. A geometrically simple assembling configuration has been concocted for UST-2 so as to try to lower the cost of the device while keeping the positioning accuracy of the different elements. The paper summarizes the construction and assembling concepts developed, the devised positioning methodology, the design of the coil frames and positioning elements and, an initial validation of the assembling of the components.