The SMall Aspect Ratio Tokamak (SMART) is a new spherical device that is currently being designed at the University of Seville. SMART is a compact machine with a plasma major radius ($R$) greater than 0.4 m, plasma minor radius ($a$) greater than 0.2 m, an aspect ratio ($A$) over than 1.7 and an elongation ($k$) of more than 2. It will be equipped with 4 poloidal field coils, 4 divertor field coils, 12 toroidal field coils and a central solenoid. The heating system comprises of a Neutral Beam Injector (NBI) of 600 kW and an Electron Cyclotron Resonance Heating (ECRH) of 6 kW for pre-ionization. SMART has been designed for a plasma current ($I_p$) of 500 kA, a toroidal magnetic field ($B_T$) of 1 T and a pulse length of 500 ms preserving the compactness of the machine. The free boundary equilibrium solver code FIESTA [1] coupled to the linear time independent, rigid plasma model RZIP [2] has been used to calculate the target equilibria taking into account the physics goals, the required plasma parameters, vacuum vessel structures and power supply requirements. We present here the final design of the SMART vacuum vessel together with the Finite Element Model (FEM) analysis carried out to ensure that the tokamak vessel provides high quality vacuum and plasma performance withstanding the electromagnetic $j\times B$ loads caused by the interaction between the eddy currents induced in the vessel itself and the surrounding magnetic fields. A parametric model has been set up for the topological optimization of the vessel where the thickness of the wall has been locally adapted to the expected forces. An overview of the new machine is presented here.

小型长宽比Tokamak（SMART）是塞维利亚大学目前正在设计的新型球形设备。SMART是一款具有等离子主半径（$\mathrm{[R}$）大于0.4 m，血浆小半径（$\mathrm{一种}$）大于0.2 m，长宽比（$\mathrm{一种}$）大于1.7且伸长率（$ķ$）大于2。它将配备4个极向场线圈，4个偏向器场线圈，12个环形场线圈和一个中央螺线管。加热系统包括600 kW的中性束注入器（NBI）和6 kW的电子回旋加速器加热（ECRH），用于预电离。SMART专为等离子电流（${\mathrm{一世}}_p$）500 kA，环形磁场（${乙}_{Ť}$）的1 T和500 ms的脉冲长度保持了机器的紧凑性。考虑到物理目标，所需的等离子体参数，真空容器结构和电源，已将自由边界平衡求解器代码FIESTA [1]与线性独立于时间的刚性等离子体模型RZIP [2]结合使用来计算目标平衡要求。我们在这里介绍SMART真空容器的最终设计，以及进行的有限元模型（FEM）分析，以确保托卡马克容器在承受电磁干扰的情况下提供高质量的真空和等离子体性能$Ĵ\times 乙$由在容器本身中感应的涡流与周围磁场之间的相互作用引起的最大载荷。已经建立了参数模型，用于容器的拓扑优化，其中壁的厚度已局部适应预期的力。这里介绍了新机器的概述。