Liquid metal “divertorlets” concept for fusion reactors

A. E. Fisher, Z. Sun, E. Kolemen

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


A new, novel approach to liquid metal plasma facing components called “divertorlets” is presented and accompanied by experiments, simulations, and analysis. The development of a robust and reliable plasma facing component at the divertor is ongoing, with liquid metal divertor concepts gaining interest by showing promise for being able to handle higher heat fluxes as well as improve plasma performance through a reduction in particle recycling. The presented design in this work seeks to address challenges associated with evaporation, operation power, and liquid metal inventory. Divertorlets utilize many adjacent narrow channels with alternating vertical velocity that maintain large flow rates with small velocities at the surface by minimizing the flow path length. Preliminary results using a test stand on LMX-U at PPPL and simulations in COMSOL demonstrate the successful operation and the potential for divertorlets to remove large heat fluxes, with projections made to reactor scale showing the expected system performance.

Original languageEnglish (US)
Article number100855
JournalNuclear Materials and Energy
StatePublished - Dec 2020

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science (miscellaneous)


  • Divertor
  • Divertorlets
  • Flowing liquid metal
  • High heat flux
  • Lithium
  • Low-recycling


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