用于W7-X的ECRH系统的TE28、12模2兆瓦、140 ghz回旋管的设计考虑

IF 2 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Fusion Engineering and Design Pub Date : 2025-10-07 DOI:10.1016/j.fusengdes.2025.115465

Emmanouil Deliprimis , Zisis C. Ioannidis , Konstantinos A. Avramidis , Tobias Ruess , Stefan Illy , John Jelonnek , Manfred Thumm , Ioannis G. Tigelis

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引用次数: 0

摘要

继最近将仿星器Wendelstein 7-X （W7-X）上的电子回旋共振加热（ECRH）系统升级为1.5 mw， 140 ghz回旋加速器（TH1507U）之后，现在的工作重点是通过开发2 mw， 140 ghz连续波（CW）原型来进一步推进回旋加速器技术。本文提出了一种以te28,12模式工作的常规腔2mw， 140 ghz回旋管的两种射频和电子束光学设计。每一种设计都对应不同的工况，即低压大电流（LVHC）和高压低电流（HVLC）。这项工作的主要目标是利用W7-X现有的基础设施，同时最大限度地减少对现有1.5兆瓦回旋管的设计修改，从而确保成本效率，并增加快速实施拟议设计的可能性。考虑到与te28,12模式相关的显著（且具有挑战性的）空间电荷下降，使用现有的TH1507U二极管磁控管注入枪（MIG）以及基于二极管设计的新型三极管型MIG设计，对几种回旋管启动场景进行了深入研究。这项研究的结果为未来在140 GHz及更高频率下工作的2 mw级回旋加速器的设计和操作挑战提供了关键见解。

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Design considerations for a TE28,12-mode 2-MW, 140-GHz gyrotron for the ECRH system at W7-X

Following the recent upgrade of the Electron Cyclotron Resonance Heating (ECRH) system at the stellarator Wendelstein 7-X (W7-X) with a 1.5-MW, 140-GHz gyrotron (TH1507U), efforts are now focused on further advancing gyrotron technology by developing a 2-MW, 140-GHz Continuous Wave (CW) prototype. This paper proposes two RF and electron beam optics designs of a conventional-cavity 2-MW, 140-GHz gyrotron, operating with the TE_28,12 mode. Each design corresponds to different operating conditions, namely Low-Voltage High-Current (LVHC) and High-Voltage Low-Current (HVLC). The primary objective of the work is to leverage the existing infrastructure at W7-X while minimizing design modifications to the existing 1.5-MW gyrotron, therefore ensuring cost efficiency and increasing the possibility for a rapid implementation of the proposed designs. Given the significant (and challenging) space-charge depression associated with the TE_28,12 mode, several gyrotron startup scenarios are investigated thoroughly using the existing TH1507U diode Magnetron Injection Gun (MIG) as well as a new triode-type MIG design, which is based on the diode design. The findings of this study offer key insights into the design and operational challenges of future 2 MW-class gyrotrons operating at 140 GHz and beyond.

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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.