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

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number112315
Number of pages6
JournalFusion engineering and design
Early online date9 Apr 2021
Publication statusPublished - 1 May 2021

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.


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

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