DIFFER researcher Garud Snoep will defend his PhD thesis titled: 'Reduced-order modeling for turbulent transport in the pedestal-forming region of tokamaks'
Conclusion: Although fast reduced-order models for the turbulent transport in tokamaks have matured significantly over the past two decades, in this thesis it has been shown that there remain discrepancies in their predictions in the regime of L-mode turbulence in the pedestal-forming region of a tokamak. Futhermore, this thesis has demonstrated that through the use of a framework of systematic verification, using codes at different levels of the hierarchy of fidelity of gyrokinetics, such discrepancies can efficiently be identified. QuaLiKiz in its current form cannot be recommended for use in integrated modelling simulations of the L-mode pedestal-forming region, while for TGLF-SAT2 further investigation is required to draw definitive conclusions. Clear avenues for model improvements aimed at mitigating or further disentangling the discrepancies identified in the linear response of QuaLiKiz and TGLF-SAT2 have been presented.
- Promotor: Lopes Cardozo, Niek
- Co-promotor, external person: Bourdelle, Clarisse
- Co-promotor: Citrin, Jonathan
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