R&D around a photoneutralizer-based NBI system (Siphore) in view of a DEMO Tokamak steady state fusion reactor

Nuclear Fushion

article

A. Simonin¹  Jocelyn Achard²  K. Achkasov¹  S. Bechu⁸  C. Baudouin¹  O. Baulaigue¹  C. Blondel⁹  J.P. Boeuf^1,10  D. Bresteau⁹  G. Cartry⁵  W. Chaibi^1,11  C. Drag⁹  H.P.L. de Esch¹  D. Fiorucci¹  G. Fubiani^1,10  I. Furno^1,12  R. Futtersack^1,10  P. Garibaldi¹  A. Gicquel²  C. Grand¹  Ph. Guittienne^1,13  G. Hagelaar^1,10  A. Howling^1,12  R. Jacquier^1,12  M.J. Kirkpatrick^1,14  D. Lemoine^1,15  B. Lepetit^1,15  T. Minea^1,17  E. Odic^1,14  A. Revel^1,17  B.A. Soliman^1,18  P. Teste^1,14 

[1] CEA;Laboratoire des Sciences des Procédés et des Matériaux;LSPM, CNRS-UPR 3407 Université Paris 13;Labex;Laboratoires de Physique des Interactions Ioniques et Moléculaires;PIIM;Aix-Marseille University;LPSC, Université Grenoble-Alpes;Laboratoire Aimé-Cotton ,(LAC), CNRS, université Paris-Sud;Laboratoire Plasma et Conversion d’Energie, LAPLACE, P. Sabatier University;Laboratoire ARTEMIS-UMR CNRS 7250;Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches en Physique des Plasmas CH-1015 Lausanne;Helyssen Sàrl;Laboratoire Génie Electrique, Electronique de Paris, GeePs, CNRS UMR 8507, CentraleSupélec, UPSud Université Paris-Saclay and UPMC Sorbonne Université;Université de Toulouse, Université Paul Sabatier, Laboratoire Collisions Agrégats Réactivité;CNRS;Laboratoire de Physique des Gaz et des Plasmas, LPGP, UMR 8578: CNRS- Paris-Sud University;Accelerators and Ion sources Department, Nuclear Research Center ,(NRC), Atomic energy Authority, PO Box: 13759 Inchas

关键词: plasma modelling;    negative ions;    neutral beams;    DEMO;    helicon;    photoneutralization;    HV bushing;   

DOI  :  10.1088/0029-5515/55/12/123020

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

Since the signature of the ITER treaty in 2006, a new research programme targeting the emergence of a new generation of neutral beam (NB) system for the future fusion reactor (DEMO Tokamak) has been underway between several laboratories in Europe. The specifications required to operate a NB system on DEMO are very demanding: the system has to provide plasma heating, current drive and plasma control at a very high level of power (up to 150 MW) and energy (1 or 2 MeV), including high performances in term of wall-plug efficiency ( η   >  60%), high availability and reliability. To this aim, a novel NB concept based on the photodetachment of the energetic negative ion beam is under study. The keystone of this new concept is the achievement of a photoneutralizer where a high power photon flux (~3 MW) generated within a Fabry–Perot cavity will overlap, cross and partially photodetach the intense negative ion beam accelerated at high energy (1 or 2 MeV). The aspect ratio of the beam-line (source, accelerator, etc) is specifically designed to maximize the overlap of the photon beam with the ion beam. It is shown that such a photoneutralized based NB system would have the capability to provide several tens of MW of D⁰ per beam line with a wall-plug efficiency higher than 60%. A feasibility study of the concept has been launched between different laboratories to address the different physics aspects, i.e. negative ion source, plasma modelling, ion accelerator simulation, photoneutralization and high voltage holding under vacuum. The paper describes the present status of the project and the main achievements of the developments in laboratories.

【 授权许可】

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