Physics basis for the first ITER tungsten divertor

• Reviews the fundamental physics aspects of the first ITER W divertor and defines the required operational lifetime within the Staged Approach. • Uses the ITER divertor SOLPS simulation database to establish the target peak heat flux and neutral pressure burning plasma operating domain. • Assesses consequences of narrow SOL heat flux channels, fluid drifts, component shaping and 3D magnetic fields for ELM control. • Uses W recrystallization to define an operational budget and shows that heat fluxes ∼50% higher than previously assumed may be acceptable. • Shows that Ne and N should be equally good as seed impurities and suggests that very strong ELM mitigation will be required at high performance. • Provides a…

• UD
  U.S. Department of Energy

  Awards: 17-12-01020, DE-SC0012315, DE-SC0013911
• UO
  University of Wisconsin-Madison
• RS
  Russian Science Foundation

  Award: 17-12-01020