ASDEX升级中带盘管的新型上部分流器的最终实施

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Fusion Engineering and Design Pub Date : 2025-04-09 DOI:10.1016/j.fusengdes.2025.115028

I. Zammuto , A. Herrmann , M. Weißgerber , W. Zeidner , N. Arden , N. Berger , V. Brack , T. Lunt , B. Petzold , V. Rohde , G. Schall , M. Teschke , T. Vierle , S. Vorbrugg , Paolo Badino , Marco Dani

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引用次数: 0

摘要

对脱离机制的理论研究强调了通过替代性分流器配置（如 "雪花 "和 "X-分流器 "概念）解决功率耗尽难题的潜力。这些配置是通过整合沿上分流器外侧撞击线布置的两个线圈来实现的。这一概念即将在位于加兴的中型托卡马克 ASDEX 升级（AUG）中进行测试。自2022年8月以来，AUG一直处于维护阶段，以完成各种任务，包括安装新型组件，如配备低温泵的上分流器、内外分流器模块，特别是两个同心线圈，每个线圈都能承载52 kAt的电流。线圈导体的设计专为满足这些要求而量身定做。它采用带有内部水冷通道的空心铜导体，周围是由 Tefzel（一种氟基聚合物）制成的电气绝缘层，并包裹在不锈钢护套中。这种设计确保了与真空容器严格的超高真空（UHV）条件的兼容性，同时还提供了对电气故障的保护。近年来，对导体进行了广泛的电气和热测试，以验证其性能。这些线圈的一个显著特点是由单根连续长度的导体构成，消除了内部电气接头，从而降低了故障风险。然而，这种设计方法需要在 AUG 真空容器高度受限的空间内卷绕线圈。在使用定制的模型进行了广泛的测试阶段后，两个线圈被成功弯曲并安装在 AUG 真空容器内，与新的上分流器结构完美地结合在一起。本文详细概述了该项目的主要组成部分、当前状态以及所涉及的关键装配阶段。索引术语 - ASDEX 升级、分流器、舱内线圈雪花分流器；先进的分流器配置。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Final implementation of the new upper divertor with coils in ASDEX Upgrade

Theoretical investigations into detachment mechanisms have emphasized the potential of addressing the power exhaust challenge through alternative divertor configurations, such as the Snowflake and X-Divertor concepts. These configurations are realized by integrating two coils positioned along the outer strike line of the upper divertor. This concept is set to be tested soon at ASDEX Upgrade (AUG), a mid-sized tokamak located in Garching. Since August 2022, AUG has been undergoing a maintenance phase to facilitate various tasks, including the installation of novel components such as the upper divertor equipped with cryopump, inner and outer divertor modules, and notably, two concentric coils, each capable of carrying a current of 52 kAt.

The coil conductor design has been specifically tailored to meet these requirements. It features a hollow copper conductor with an internal water-cooling channel, surrounded by electrical insulation made of Tefzel—a fluorine-based polymer—and encased in a stainless-steel jacket. This design ensures compatibility with the stringent ultra-high vacuum (UHV) conditions of the vacuum vessel while also providing protection against electrical faults. Extensive electrical and thermal testing of the conductor has been carried out in recent years to validate its performance.

A distinctive feature of these coils is their construction from a single, continuous length of conductor, eliminating internal electrical joints to reduce the risk of failures. However, this design approach required a significant effort to wind the coils within the highly constrained space of the AUG vacuum vessel. A sophisticated bending procedure, supported by in-house-developed tools, was devised to address the spatial limitations and meet the required precision.

Following an extensive testing phase using a custom-built mock-up, the two coils were successfully bent and installed within the AUG vacuum vessel, integrating seamlessly into the new upper divertor structure. This paper provides a detailed overview of the project's main components, its current status, and the critical assembly phases involved.

Index Terms— ASDEX Upgrade, Divertor, In-vessel coils Snowflake divertor; advanced divertor configuration.

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来源期刊

Fusion Engineering and Design 工程技术-核科学技术

CiteScore

3.50

自引率

23.50%

发文量

275

审稿时长

3.8 months

期刊介绍： The journal accepts papers about experiments (both plasma and technology), theory, models, methods, and designs in areas relating to technology, engineering, and applied science aspects of magnetic and inertial fusion energy. Specific areas of interest include: MFE and IFE design studies for experiments and reactors; fusion nuclear technologies and materials, including blankets and shields; analysis of reactor plasmas; plasma heating, fuelling, and vacuum systems; drivers, targets, and special technologies for IFE, controls and diagnostics; fuel cycle analysis and tritium reprocessing and handling; operations and remote maintenance of reactors; safety, decommissioning, and waste management; economic and environmental analysis of components and systems.