Please cite this article in press as: M. Bigi, et al., Design, manufacture and factory testing of the Ion Source and Extraction Power Supplies for the SPIDER experiment, Fusion Eng. Des. (2015), http://dx.doi.org/10.1016/j.fusengdes.2015.06.163 ARTICLE IN PRESS G Model FUSION-8182; No. of Pages 6 Fusion Engineering and Design xxx (2015) xxx–xxx Contents lists available at ScienceDirect Fusion Engineering and Design jo ur nal home p age: www.elsevier.com/locate/fusengdes Design, manufacture and factory testing of the Ion Source and Extraction Power Supplies for the SPIDER experiment Marco Bigi a,∗ , Luigi Rinaldi b , Muriel Simon c , Luca Sita b , Giuseppe Taddia b , Saverino Carrozza b , Hans Decamps d , Adriano Luchetta a , Abdelraouf Meddour e , Modesto Moressa a , Cristiano Morri b , Antonio Musile Tanzi b , Mauro Recchia a , Uwe Wagner e , Andrea Zamengo a , Vanni Toigo a a Consorzio RFX (CNR, ENEA, INFN, Università di Padova, Acciaierie Venete SpA), Corso Stati Uniti 4, 35127 Padova, Italy b OCEM Energy Technology, Via della Solidarietà 2/1, 40056 Valsamoggia (località Crespellano), Bologna, Italy c Fusion for Energy, Josep Pla 2, 08019 Barcelona, Spain d ITER Organization, Route de Vinon sur Verdon, 13115 Saint Paul lez Durance, France e HIMMELWERK Hoch- und Mittelfrequenzanlagen GmbH, Jopestr. 10, 72072 Tübingen, Germany h i g h l i g h t s • 5 MVA ion source power supplies effectively integrated in 150 m 2 Faraday cage. • Load protection and performance requirements met of custom design high voltage power supplies. • 200 kW tetrode oscillator with 200 kHz frequency range successfully tested. a r t i c l e i n f o Article history: Received 24 September 2014 Received in revised form 29 May 2015 Accepted 30 June 2015 Available online xxx Keywords: Neutral beam injector Power supply High voltage Radiofrequency High current a b s t r a c t The SPIDER experiment, currently under construction at the Neutral Beam Test Facility in Padua, Italy, is a full-size prototype of the ion source for the ITER Neutral Beam Injectors. The Ion Source and Extrac- tion Power Supplies (ISEPS) for SPIDER are supplied by OCEM Energy Technology s.r.l. (OCEM) under a procurement contract with Fusion for Energy (F4E) covering also the units required for MITICA and ITER injectors. The detailed design of SPIDER ISEPS was finalized in 2011 and manufacture of most compo- nents completed by end 2013. The Factory Acceptance Tests took place early 2014. ISEPS, with an overall power rating of 5 MVA, form a heterogeneous set of items including solid state power converters and 1 MHz radiofrequency generators of 200 kW output power. The paper presents the main features of the detailed design developed by OCEM, focusing in particular on the high output voltage pulse step mod- ulators, the high output current resonant converters, the radiofrequency generators by HIMMELWERK GmbH and the architecture and implementation of the complex control system. Details are given on non- standard factory tests verifying the insulation requirements specific to this application. Performance of ISEPS during the factory acceptance tests is described, with emphasis on demonstration of the load pro- tection requirements, a crucial point for all neutral beam power supplies. Finally, key dates of SPIDER ISEPS installation and site testing schedule are provided. © 2015 Elsevier B.V. All rights reserved. 1. Introduction The Ion Source and Extraction Power Supplies (ISEPS) include all the power supplies required for running the negative ion source ∗ Corresponding author. E-mail address: marco.bigi@igi.cnr.it (M. Bigi). of ITER Heating Neutral Beam Injector (HNBI) [1] and for extracting an ion beam from the source. The development of the ITER HNBI will be carried out on a ded- icated test facility (NBTF) [2] being established in Padua, Italy at Consorzio RFX (RFX) premises. The neutral beam test facility will host two separate experiments, known as SPIDER and MITICA. SPI- DER will be devoted to the study of the ion source and equipped with -100 kV beam acceleration. MITICA will test the complete megavolt HNBI design. http://dx.doi.org/10.1016/j.fusengdes.2015.06.163 0920-3796/© 2015 Elsevier B.V. All rights reserved.