Design, manufacture and factory testing of the Ion Source and Extraction Power Supplies for the SPIDER experiment

Marco Bigi, Luigi Rinaldi, Muriel Simon, Luca Sita, Giuseppe Taddia, Saverino Carrozza, Hans Decamps, Adriano Luchetta, Abdelraouf Meddour, Modesto Moressa, Cristiano Morri, Antonio Musile Tanzi, Mauro Recchia, Uwe Wagner, Andrea Zamengo, Vanni Toigo

Research output: Contribution to journalArticle

11 Citations (Scopus)


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 Extraction 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 components 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 modulators, 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 protection requirements, a crucial point for all neutral beam power supplies. Finally, key dates of SPIDER ISEPS installation and site testing schedule are provided.
Original languageEnglish
Pages (from-to)405 - 410
Number of pages6
JournalFusion Engineering and Design
Publication statusPublished - 1 Oct 2015
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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