Design and development of the actively cooled ion cyclotron travelling wave array system for WEST

Julien Hillairet; Vincent Maquet; Riccardo Ragona; Tristan Batal; Sylvain Burles; Zhaoxi Chen; Laurent Colas; Rémi Dumont; Florian Dupin; Frédéric Durand; Frédéric Durodié; Nicolas Faure; Silvia Garitta; Lara Hijazi; Nicolas Lapcevic; Itziar Minondo; Raphaël Mitteau; Benoit Salamon; Benjamin Santraine; Dimitri Tainturier; Genmu Shi

doi:10.1051/epjconf/202634603003

All issues

Volume 346 (2026)

EPJ Web Conf., 346 (2026) 03003

Abstract

Open Access

Issue		EPJ Web Conf. Volume 346, 2026 25^th Topical Conference on Radio-Frequency Power in Plasmas (RFPPC2025)


Article Number		03003
Number of page(s)		5
Section		Radio-Frequency and Microwave Diagnostics and Technology
DOI		https://doi.org/10.1051/epjconf/202634603003
Published online		07 January 2026

EPJ Web of Conferences 346, 03003 (2026)
https://doi.org/10.1051/epjconf/202634603003

Design and development of the actively cooled ion cyclotron travelling wave array system for WEST

Julien Hillairet¹^*, Vincent Maquet², Riccardo Ragona³, Tristan Batal¹, Sylvain Burles¹, Zhaoxi Chen⁴, Laurent Colas¹, Rémi Dumont¹, Florian Dupin¹, Frédéric Durand¹, Frédéric Durodié², Nicolas Faure¹, Silvia Garitta¹, Lara Hijazi¹, Nicolas Lapcevic¹, Itziar Minondo¹, Raphaël Mitteau¹, Benoit Salamon¹, Benjamin Santraine¹, Dimitri Tainturier¹ and Genmu Shi⁴

¹ CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
² Laboratory for Plasma Physics, LPP-ERM/KMS, 1000 Brussels, Belgium
³ Technical University of Denmark, Department of Physics, 2800 Lyngby, Denmark
⁴ Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China

^* Corresponding author: Julien.HILLAIRET@cea.fr

Published online: 7 January 2026

Abstract

This paper presents the preliminary design of the Ion Cyclotron Range of Frequency (ICRF) Travelling Wave Array (TWA) system for the WEST facility. The TWA system aims to address the limitations of current ICRF launchers, focusing on improved coupling, reduced voltages and RF sheaths and enhanced reliability. The project is staged in two phases: first, a direct feeding scheme will be used, and later a resonant ring feeding circuit will be installed. This paper outlines the main milestones, plasma scenarios, RF design and mechanical challenges along with the experimental program planned for the WEST TWA system.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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