Please cite this article in press as: A. Rizzolo, et al., Electro-mechanical connection system for ITER in-vessel magnetic sensors, Fusion Eng. Des. (2016), http://dx.doi.org/10.1016/j.fusengdes.2016.03.027 ARTICLE IN PRESS G Model FUSION-8648; No. of Pages 6 Fusion Engineering and Design xxx (2016) xxx–xxx Contents lists available at ScienceDirect Fusion Engineering and Design jo ur nal home p age: www.elsevier.com/locate/fusengdes Electro-mechanical connection system for ITER in-vessel magnetic sensors Andrea Rizzolo a , Matteo Brombin a , Winder Gonzalez a , Nicolò Marconato a,∗ , Simone Peruzzo a , Shakeib Arshad b , Yunxing Ma c , George Vayakis c , Adrian Williams d a Consorzio RFX, Corso Stati Uniti, 4, 35127 Padova, Italy b Fusion for Energy, C/Josep Pla, 2, 08019 Barcelona, Spain c ITER Organization, Route de Vinon-sur-Verdon, 13067 St Paul Lez Durance, France d Oxford Technologies Ltd, 7 Nuffield Way, Abingdon, Oxon, OX14 1RL, UK h i g h l i g h t s • Latest status of the ITER “Generic In-Vessel Magnetic Platform” design activity. • Integration within the ITER In-Vessel configuration model. • Geometry optimization based on thermo-mechanical and magnetic field 3D calculation. • Assessment of the remote handling maintenance compatibility. a r t i c l e i n f o Article history: Received 21 August 2015 Received in revised form 20 January 2016 Accepted 5 March 2016 Available online xxx Keywords: Electrical connection Magnetic diagnostics Remote maintenance a b s t r a c t This paper presents the preliminary design of the “In-Vessel Magnetic platform”, which is a subsystem of the magnetic diagnostics formed by all the components necessary for guaranteeing the thermo- mechanical interface of the actual magnetic sensors with the vacuum vessel (VV), their protection and the electrical connection to the in-vessel wiring for the transmission of the detected signal with a minimum level of noise. The design has been developed in order to comply with different functional requirements: the mechanical attachment to the VV; the electrical connection to the in-vessel wiring; efficient heat transfer to the VV; the compatibility with Remote Handling (RH) system for replacement; the integration of metrology features for post-installation control; the Electro Magnetic Interference (EMI) shielding from Electron Cyclotron Heating (ECH) stray radiation without compromising the sensor pass band (15 kHz). Significant effort has been dedicated to develop the CAD model, integrated within the ITER In-Vessel configuration model, taking care of the geometrical compliance with the Blanket modules (modified in order to accommodate the magnetic sensors in suitable grooves) and the RH compatibility. Thorough thermo-mechanical and electro-magnetic Finite Element Method (FEM) analyses have been performed to assess the reliability of the system in standard and off-normal operating conditions for the low frequency magnetic sensors. © 2016 Consorzio RFX. Published by Elsevier B.V. All rights reserved. 1. Introduction Several hundreds of magnetic sensors are required in ITER in order to provide measurements for machine protection, plasma control, equilibrium reconstruction and physics studies, including plasma performance and stability [1,2]. They will be located within the ITER Vacuum Vessel (VV), in a hostile environment character- ∗ Corresponding author. E-mail address: nicolo.marconato@igi.cnr.it (N. Marconato). ized by severe neutron irradiation and plasma heat loads strongly affecting their reliability and durability. The in-vessel magnetic sensors are indeed conceived to be attached to the inner surface of the VV through a connection system which allows a potential replacement by a suitable Remote Handling (RH) system. ITER is a Nuclear Facility INB-174. The “Generic In-Vessel Magnetic Platform” is a specific com- ponent shared by a subset of the ITER in-vessel discrete magnetic sensors [3], which are 4 different kinds of sensors, namely: Inner Tangential Coils, Inner Normal Coils, Toroidal Coils and High Fre- quency Sensors. http://dx.doi.org/10.1016/j.fusengdes.2016.03.027 0920-3796/© 2016 Consorzio RFX. Published by Elsevier B.V. All rights reserved.