Design and construction of the first ELM resilient long pulse ICRH antenna for WEST

•The first ICRH, long pulse operation, ELMs Resilient antenna has been manufactured.•Antenna will operate at 3MW/30s or 1MW/1000s and is fully actively cooled.•ELMs resilience with matching capacitors and low impedance T junction.•Two others antenna will be manufactured mid 2017.•Result of a strong collaboration between CEA/IRFM in France and CAS/ASIPP in China. One of the key missions of the Ion Cyclotron Resonant Heating (IRCH) system for WEST is to provide sufficient RF heating power in order to obtain a heat flux on the divertor target of 10MW/m2 during 1000s and 20MW/m2 during a few tens of seconds. Based on the experience acquired in Tore Supra, the ICRH system has been upgraded for long pulse operation and Edge Localized Modes (ELM) resilience. To achieve this performance, three antennas have been designed through a European collaboration and are now under fabrication at CAS/ASIPP, at the Keye Company, Hefei, in China, within the framework of the Associated Laboratory IRFM-ASIPP. This paper describes the electrical and mechanical design of the antenna, together with the main manufacturing steps and leak test procedure used for validating the water-cooled components. Accessibility and maintenance studies on WEST have been performed with the help of virtual reality. The first ICRH antenna was delivered at Cadarache in July 2016, and is foreseen to be installed on WEST in 2017.