Abstract For the EU DEMO Tokamak, Electron Cyclotron (EC) launching systems for plasma heating and stabilization are under development. Various concepts for the optical system are currently studied of which the Mid Steering Antenna (MSA) with a steering mirror at a recessed position behind the breeding blanket (BB), the Open Ended Waveguide (OEWG) concept with quasi-optical beam propagation by fixed mirrors only and the Remote Steering Antenna (RSA), currently seen as back-up solution, are the basic ones. In addition, hybrid solutions, which means a port plug with different launcher concepts, are taken into consideration. In parallel, design drafts for a generic equatorial port plug are sketched with the aim to provide a versatile structural system, which allows customized installation of the potential optical systems. This paper presents a pre-conceptual hybrid design of an equatorial EU DEMO EC port plug based on MSA for plasma stabilization and OEWG for plasma heating, taking into account the exact port position with respect to the toroidal field coil, mechanical integrity, heat dissipation, neutronic shielding requirements, design integration and maintenance concepts.

中文翻译：

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EU DEMO 赤道 EC 端口插头及其端口集成的结构前概念设计研究

摘要 对于欧盟 DEMO 托卡马克，用于等离子体加热和稳定的电子回旋加速器 (EC) 发射系统正在开发中。目前正在研究光学系统的各种概念，其中在育种毯 (BB) 后面的凹陷位置带有转向镜的中转向天线 (MSA)，具有固定准光学光束传播的开放端波导 (OEWG) 概念。仅镜子和远程转向天线 (RSA)，目前被视为备用解决方案，是基本的。此外，还考虑了混合解决方案，即具有不同发射器概念的端口插头。同时，绘制了通用赤道端口插头的设计草图，目的是提供一个通用的结构系统，允许定制安装潜在的光学系统。