Recent technical advancements of the ITER Equatorial Visible/InfraRed Diagnostic

Abstract: The Equatorial Visible/InfraRed Diagnostic is one of the key diagnostics of ITER, due to its crucial role for the machine protection, through the determination of plasma facing components temperatures (infrared range) and the first wall survey (visible range). Due to its location (close to the plasma) and its complexity (two types of wavelength must be transferred from the plasma to the detectors), the development of this diagnostic needs to address a lot of non-trivial issues. Significant technical advancements have been performed since a few years. This paper focuses on the recent progress made on the design and integration of the diagnostic. After a short description of the system, this paper shows the changes proposed for its integration in the port plugs where it is installed and the improvements brought to its design. It also presents the first results of a neutronic analysis which aims at optimizing the geometry of the dog leg mirrors forming a labyrinth for the neutrons in the port plug. [Copyright &y& Elsevier]