Investigation of the dependency of JET midplane separatrix density as a function of engineering parameters

• DOI: 10.1002/ctpp.201900157
• Publication Date: 2020-04-20T06:55:08Z
• Authors: Julio J. Balbin‐A...; Jerome Bucalossi; Hugo Bufferand; Guido Ciraolo
• Keywords: Separatrix; Pedestal; Thomson scattering

Abstract Midplane separatrix density is a crucial parameter in tokamaks since it strongly impacts divertor conditions. Scaling midplane density, n e , SEP and pedestal PED as function of engineering parameters such auxiliary heating P injected toroidal magnetic field B T plasma poloidal current I p are relevant to observe the effect tuning these on, for example, quality confinement regime governed by respectively. Thus, dataset JET H‐mode pulses performed with Iter like wall (ILW) has been analysed. data collected from an HRTS (high‐resolution Thomson scattering) diagnostic determined using power balance method. Parallel heat flux model chosen transport code SOLEDGE2D (S2D) applying method over simulated profiles obtain positions. The averaged time windows order (85–185 ms ) configuration fixed avoid geometrical on determination, corner–corner. A ratio between at outer ranges 0.3 0.7 set. scaling law / e, obtained .