The self-consistent core-pedestal prediction model of a combination of EPED1 type pedestal prediction and a simple stiff core transport model is able to predict Type I ELMy (edge localized mode) pedestals of a large JET-ILW (ITER-like wall) database at the similar accuracy as is obtained when the experimental global plasma β is used as input. The neutral penetration model [R. J. Groebner et al., Phys. Plasmas 9, 2134 (2002)] with corrections that take into account variations due to gas fueling and plasma triangularity is able to predict the pedestal density with an average error of 15%. The prediction of the pedestal pressure in hydrogen plasma that has higher core heat diffusivity compared to a deuterium plasma with similar heating and fueling agrees with the experiment when the isotope effect on the stability, the increased diffusivity, and outward radial shift of the pedestal are included in the prediction. However, the neutral penetration model that successfully predicts the deuterium pedestal densities fails to predict the isotope effect on the pedestal density in hydrogen plasmas.
Self-consistent pedestal prediction for JET-ILW in preparation of the DT campaign
See the author list of “Overview of the JET preparation for Deuterium-Tritium Operation” by E. Joffrin et al. to be published in Nuclear Fusion Special issue: Overview and summary reports from the 27th Fusion Energy Conference (Ahmedabad, India, 22–27 October 2018).
Note: This paper is part of the Special Collection: Papers from the 60th Annual Meeting of the APS Division of Plasma Physics.
Note: Paper TI2 2, Bull. Am. Phys. Soc. 63 (2018).
S. Saarelma, L. Frassinetti, P. Bilkova, C. D. Challis, A. Chankin, R. Fridström, L. Garzotti, L. Horvath, C. F. Maggi, JET Contributors; Self-consistent pedestal prediction for JET-ILW in preparation of the DT campaign. Phys. Plasmas 1 July 2019; 26 (7): 072501. https://doi.org/10.1063/1.5096870
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