The Divertor Tokamak Test (DTT) facility is an experimental facility under design and construction at ENEA C.R. Frascati. The aim of DTT is to investigate the power exhaust problem in a tokamak, providing possible alternative divertor solutions, with respect the conventional one, which can be extrapolated to DEMO fusion reactor. One of the main components of DTT facility is the Vacuum Vessel (VV), which has the function of providing an enclosed, vacuum environment for the plasma, acting also as a first confinement barrier. Starting from geometrical constraints, imposed by the desired plasma scenario and the configuration needed for the magnetic coils, the conceptual design of the VV was developed and dedicated research activities were carried out to verify design choices. A multiphysical approach was adopted with the aim of identifying a feasible and reliable solution for the VV, taking into account functional and design requirements, relevant aspects and issues. In particular, to assess and to optimize the VV design, fluid-dynamic, thermal and structural analyses were carried out, which are presented in the paper, as well as the progresses of the design.

中文翻译：

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DTT设备真空容器的设计现状

偏滤器托卡马克测试 (DTT) 设施是 ENEA CR Frascati 正在设计和建造的实验设施。DTT 的目的是研究托卡马克装置中的功率消耗问题，提供相对于传统偏滤器的可能替代解决方案，并可推广到 DEMO 聚变反应堆。DTT设施的主要组成部分之一是真空容器（VV），它的功能是为等离子体提供封闭的真空环境，同时也充当第一道限制屏障。从所需等离子体场景和磁线圈所需配置所施加的几何约束出发，开发了 VV 的概念设计，并开展了专门的研究活动来验证设计选择。采用多物理方法，旨在为 VV 确定可行且可靠的解决方案，同时考虑到功能和设计要求、相关方面和问题。特别是，为了评估和优化 VV 设计，进行了流体动力学、热力和结构分析，文中介绍了这些分析以及设计进展。