CNR ExploRA

Abstract in atti di convegno, 2020, ENG

Overview on the development of the DEMO diagnostic and control system

Biel Wolfgang; Alessi Edoardo; Ambrosino Roberto; Ariola Marco; Bolshakova Inessa; Brunner Kai Jakob; Cecconello Marco; Conroy Sean; Dezman Dejan; Duran Ivan; Entler Slavomir; Fable Emiliano; Farina Daniela; Franke Thomas; Giacomelli Luca; Giannone Louis; Gomes Rui; Goncalves Bruno; Heuraux Stephane; Hjalmarsson Anders; Hron Martin; Janky Filip; Jesenko Anze; Krimmer Andreas; Kudlacek Oleksandr; Luis Raul; Marchuk Oleksandr; Marchiori Giuseppe; Mattei Massimiliano; Maviglia Francesco; De Masi Gianluca; Mazon Didier; Muscente Paola; Nietiadi Yohanes; Nowak Silvana; Pironti Alfredo; Quercia Antonio; Ricardo Emanuel; Rispoli Natale; Sergienko Gennadi; Schramm Raphael; El Shawish Samir; Siccinio Mattia; Silva Antonio; Sozzi Carlo; Tardocchi Marco; Testa Duccio; Treutterer Wolfgang; Vale Alberto; Vasyliev Oleksandr; Wiesen Sven; Zohm Hartmut; Da Silva Filipe

Institut für Energie und Klimaforschung, Forschungszentrum Jülich GmbH, Germany; ISTP-CNR-Mi, Istituto di Scienza e Tecnologia dei Plasmi, Milano, Italy; Università degli Studi di Napoli Federico II, Consorzio CREATE, Italy; Universita' di Napoli "Parthenope", Consorzio CREATE, Italy; Magnetic Sensor Laboratory, Lviv, Ukraine; Max-Planck-Institut für Plasmaphysik, Greifswald, Germany; Department of Physics and Astronomy, Uppsala University, Sweden; Cosylab, Ljubljana, Slovenia; Institute of Plasma Physics, Czech Academy of Science, Praha, Czech Republic; Max-Planck-Institut für Plasmaphysik, Garching, Germany; Instituto de Plasmas e Fusão Nuclear, IST, Universidade de Lisboa, Portugal; Institut Jean Lamour CNRS-Université de Lorraine, ARTEM, Nancy, France; Consorzio RFX (CNR, ENEA, INFN, Università di Padova), Padova, Italy; CNR ISTP, Istituto per la Scienza e Tecnologia dei Plasmi, Sede di Padova, Italy; Universita' della Campania "Luigi Vanvitelli", Consorzio CREATE, Italy; CEA, IRFM, Saint Paul-lez-Durance, France; Josef Stefan Institute, Ljubljana, Slovenia; École Polytechnique Fédérale de Lausanne (EPFL), Swiss Plasma Center (SPC), Lausanne, Switzerland.

Within the European development of a future tokamak demonstration fusion power plant (DEMO) [1] the pre-conceptual studies on the plasma diagnostic and control (D&C) system are progressing to prepare the basis for reliable plasma operation at high overall performance [2]. A variety of plasma diagnostics will be employed on DEMO together with advanced control techniques in order to provide an accurate knowledge of the plasma state, which is needed to maintain plasma operation within the allowed physical and technical limits. The integration of diagnostic front-end components has to cope with strong adverse effects arising from neutron and gamma irradiation, heat loads, impinging particles and forces. In this environment, the quality of measurements can only be ensured for longer periods by using robust diagnostic components, mounting them in sufficiently protected (retracted) locations, and any maintenance can only be performed via remote handling. Major open issues are the durability of magnetic measurements in the presence of irradiation induced effects and the feasibility of detachment control under DEMO conditions. In parallel to diagnostic developments, the details of the main control issues are being formulated and investigated by quantitative plasma control simulations. To obtain the envisaged performance DEMO operates close to some physics limits where even small disturbances, if not properly controlled, can trigger major variations of the plasma parameters. Equilibrium control requires high control power and can drive the poloidal field coil system to its operational limits. Within this paper, we will provide an overview on the current status of the ongoing D&C developments for the European DEMO concept.

31st Symposium on Fusion Technology (SOFT 2020), Virtual Conference, 20-25 September 2020