Thermal fatigue tests with actively cooled divertor mock-ups for ITER

M. Rödig, R. Duwe, C. Ibbott, D. Jacobson, G. Le Marois, A. Lind, J. Linke, P. Lorenzetto, A. Peacock, L. Plöchl, A. Schuster, Y. Sever, G. Vieider, E. Visca, B. Wiechers

Research output: Contribution to journalArticle

9 Citations (Scopus)


Mock-ups for high heat flux components with beryllium and CFC armour materials have been tested by means of the electron beam facility JUDITH. The experiments concerned screening tests to evaluate heat removal efficiency and thermal fatigue tests. CFC monoblocks attached to DS-Cu (Glidcop Al25) and CuCrZr tubes by active metal casting and Ti brazing showed the best thermal fatigue behaviour. They survived more than 1000 cycles at heat loads up to 25 MW m-2without any indication of failure. Operational limits are given only by the surface temperature on the CFC tiles. Most of the beryllium mock-ups were of the flat tile type. Joining techniques were brazing, hot isostatic pressing (HIP) and diffusion bonding. HIPed and diffusion bonded Be/Cu modules have not yet reached the standards for application in high heat flux components. The limit of this production method is reached for heat loads of approximately 5 MW m-2. Brazing with and without silver seems to be a more robust solution. A flat tile mock-up with CuMnSnCe braze was loaded at 5.4 MW m-2for 1000 cycles without damage. The first test with a beryllium monoblock joined to a CuCrZr tube by means of Incusil brazing shows promising results; it survived 1000 cycles at 4.5 MW m-2without failure. © 1998 Elsevier Science S.A. All rights reserved.
Original languageEnglish
Pages (from-to)551 - 557
Number of pages7
JournalFusion Engineering and Design
Publication statusPublished - 1 Sep 1998
Externally publishedYes


All Science Journal Classification (ASJC) codes

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

Cite this

Rödig, M., Duwe, R., Ibbott, C., Jacobson, D., Le Marois, G., Lind, A., ... Wiechers, B. (1998). Thermal fatigue tests with actively cooled divertor mock-ups for ITER. Fusion Engineering and Design, 39-40, 551 - 557.