The Transmission Line for the SPIDER experiment

Marco Boldrin, Antonio De Lorenzi, Mauro Recchia, Vanni Toigo, Tullio Bonicelli, Muriel Simon

Research output: Contribution to journalArticle

9 Citations (Scopus)


The 100 keV Ion Source Test facility - Source for the Production of Ions of Deuterium Extracted from RF plasma (SPIDER) - is aimed to test the full scale prototype of the Ion Source for the ITER 1 MeV Neutral Beam Injector (NBI). The SPIDER facility requires the construction of a High Voltage Deck (HVD) and of a High Voltage Transmission Line (TL) respectively to host the Ion Source Power Supplies system polarized at 100 kV and to carry the power and signal conductors to the beam accelerator. In already existing NBI systems with beam energy above 100 keV, the TL is realized with the SF6Gas Insulated Line technology. In the SPIDER TL case, the presence of a large inner conductor (half meter diameter), would make the pressurized TL a complex and costly component; therefore a free air insulated solution has been proposed. The paper focuses on the design of this TL, which has to host inside the complex high potential (100 kV) inner electrode a number of power and measuring conductors and has to minimize the Electro Magnetic Interferences (EMI) produced by the frequent grids breakdowns. Finite Element (FE) analyses have been performed to verify the configuration from the electrostatic point of view, to evaluate EMI screening effectiveness and to assess the impact of the relatively high thermal dissipation of power conductors located inside the high potential electrode. Moreover, an experimental test campaign has been carried out on a TL mockup to validate the TL electrostatic configuration under DC voltage. Finally, the paper reports on the status of procurement activities for the Transmission Line. © 2011 EURATOM. Published by Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)754 - 758
Number of pages5
JournalFusion Engineering and Design
Issue number6-8
Publication statusPublished - Oct 2011
Externally publishedYes


All Science Journal Classification (ASJC) codes

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

Cite this

Boldrin, M., De Lorenzi, A., Recchia, M., Toigo, V., Bonicelli, T., & Simon, M. (2011). The Transmission Line for the SPIDER experiment. Fusion Engineering and Design, 86(6-8), 754 - 758.