ELM and inter-ELM tungsten erosion sources in high-power, JET ITER-like wall H-mode plasmas

• DOI: 10.1016/j.nme.2022.101264
• Publication Date: 2022-09-23T17:33:10Z
• Authors: H.A. Kumpulainen; M. Groth; S. Brezinsek; G. Corrigan; L. Frassinetti; D. Harting; F. Koechl; J. Karhunen; A.G. Meigs; M. O'Mullane; J. Romazanov
• Keywords: Metastability; Charge exchange

Simulations of JET ITER-like wall high-confinement mode plasmas, including type-I edge-localised modes (ELMs), using JINTRAC for the background plasmas and ERO2.0 tungsten erosion transport, predict virtually perfect screening primary W sources at divertor targets during both ELM inter-ELM phases. The largest source influx to main plasma is predicted be outer vertical due sputtering by energetic fuel (D, T) atoms from charge-exchange reactions. predictions accurately reproduce measured I emission in low-field side divertor, but underpredict II a factor 10. Potential reasons discrepancy include uncertainties atomic data, assumptions on sheath properties angle distribution, impact metastable states.