Detailed design of the RF source for the 1 MV neutral beam test facility

D. Marcuzzi, M. Dalla Palma, M. Pavei, B. Heinemann, W. Kraus, R. Riedl

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In the framework of the EU activities for the development of the Neutral Beam Injector for ITER, the detailed design of the Radio Frequency (RF) driven negative ion source to be installed in the 1 MV ITER Neutral Beam Test Facility (NBTF) has been carried out. Results coming from ongoing R&D on IPP test beds [A. Stäbler et al., Development of a RF-Driven Ion Source for the ITER NBI System, this conference] and the design of the new ELISE facility [B. Heinemann et al., Design of the Half-Size ITER Neutral Beam Source Test Facility ELISE, this conference] brought several modifications to the solution based on the previous design. An assessment was carried out regarding the Back-Streaming positive Ions (BSI+) that impinge on the back plates of the ion source and cause high and localized heat loads. This led to the redesign of most heated components to increase cooling, and to different choices for the plasma facing materials to reduce the effects of sputtering. The design of the electric circuit, gas supply and the other auxiliary systems has been optimized. Integration with other components of the beam source has been revised, with regards to the interfaces with the supporting structure, the plasma grid and the flexible connections. In the paper the design will be presented in detail, as well as the results of the analyses performed for the thermo-mechanical verification of the components. © 2009 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)1253 - 1258
Number of pages6
JournalFusion Engineering and Design
Issue number7-11
Publication statusPublished - Jun 2009
Externally publishedYes


All Science Journal Classification (ASJC) codes

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

Cite this

Marcuzzi, D., Palma, M. D., Pavei, M., Heinemann, B., Kraus, W., & Riedl, R. (2009). Detailed design of the RF source for the 1 MV neutral beam test facility. Fusion Engineering and Design, 84(7-11), 1253 - 1258.