Chapter 9: The FTU machine-design construction and assembly

A. Pizzuto, C. Annino, M. Baldarelli, L. Bettinali, G. Brolatti, C. Crescenzi, G. Maddaluno, B. Riccardi, G.B. Righetti, M. Roccella, L. Semeraro

Research output: Contribution to journalArticle

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The main design features and guidelines for the construction of the 8-T cryogenically cooled Frascati Tokamak Upgrade (FTU) are presented. The main features include the very compact toroidal magnets based on the concept of the "Bitter" type of coil with wedge-shaped turns, utilized for the first time for the AlcatorA and C magnets, and the original configuration of the vacuum vessel (W) structure, which is fully welded in order to achieve the required high strength and electric resistivity. The present toroidal limiter has been installed following several years of operation, and this installation has required the development of specific remote-handling tools. The toroidal limiter consists of 12 independent sectors made of stainless steel carriers and molybdenum alloy (TZM) tiles. The main fabrication processes developed for the toroidal and poloidal coils as well as for the VV are described. It is to be noted that the assembly procedure has required very accurate machining of all the structures requiring several trials and steps. The machine has shown no problem in operating routinely at its maximum design values (8T, 1.6 MA).
Original languageEnglish
Pages (from-to)422 - 436
Number of pages15
JournalFusion Science and Technology
Issue number3
Publication statusPublished - 2004
Externally publishedYes


All Science Journal Classification (ASJC) codes

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

Cite this

Pizzuto, A., Annino, C., Baldarelli, M., Bettinali, L., Brolatti, G., Crescenzi, C., ... Semeraro, L. (2004). Chapter 9: The FTU machine-design construction and assembly. Fusion Science and Technology, 45(3), 422 - 436.