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Cross machine investigation of magnetic tokamak dust: Morphological and elemental analysis

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  • M. De Angeli
  • D. Ripamonti
  • F. Ghezzi
  • P. Tolias
  • C. Conti
  • C. Arnas
  • M. Jerab
  • D. L. Rudakov
  • C. P. Chrobak
  • J. Irby
  • B. LaBombard
  • B. Lipschultz
  • G. Maddaluno


Publication details

JournalFusion engineering and design
DateAccepted/In press - 3 Feb 2021
DateE-pub ahead of print - 9 Apr 2021
DatePublished (current) - 1 May 2021
Number of pages6
Early online date9/04/21
Original languageEnglish


The presence of magnetic dust can be an important issue for future fusion reactors where plasma breakdown is critical. Magnetic dust has been collected from contemporary fusion devices (FTU, Alcator C-Mod, COMPASS and DIII-D) that feature different plasma facing components. The results of morphological and elemental analysis are presented. Magnetic dust is based on steel or nickel alloys and its magnetism is generated by intense plasma-material interactions. In spite of the strong similarities in terms of morphology and composition, X-ray diffraction analysis revealed differences in the structural evolution that leads to non-trivial magnetic responses.

Bibliographical note

Funding Information:
This work is supported in part by the U.S. Department of Energy under DE-FC02-04ER54698. DIII-D data shown in this paper can be obtained in digital format by following the links at .

© 2021 Elsevier B.V. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy.

    Research areas

  • Alcator dust, Compass dust, DIII-D dust, Dust, FTU dust, Magnetic dust

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