The pedestal structure of type I ELMy H-modes has been analysed for JET with the ITERlike Wall (JET-ILW). The electron pressure pedestal width is independent of ρ* and increases proportionally to √βpol,PED. Additional broadening of the width is observed, at constant βpol, PED, with increasing ν* and/or neutral gas injection and the...
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July 31, 2020 (v1)PublicationUploaded on: December 5, 2022
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July 31, 2020 (v1)Publication
A strong effect of divertor configuration on the threshold power for the L-H transition (P LH ) was observed in recent JET experiments in the new ITER-like Wall (ILW) [1–3] . Following a series of EDGE2D-EIRENE code simulations with Be impurity and drifts a possible mechanism for the P LH variation with the di- vertor geometry is proposed. Both...
Uploaded on: March 27, 2023 -
June 30, 2020 (v1)Publication
NBI-heated L-mode plasmas have been obtained in JET with the Be/W ITER-like wall (JETILW) in H and D, with matched profiles of the dimensionless plasma parameters, ρ* , ν* , β and q in the plasma core confinement region and same Ti/Te and Zeff. The achieved isotope identity indicates that the confinement scale invariance principle is satisfied...
Uploaded on: March 25, 2023 -
June 30, 2020 (v1)Publication
EDGE2D-EIRENE (the 'code') simulations show that radial electric field, Er, in the near scrape-off layer (SOL) of tokamaks can have large variations leading to a strong local E × B shear greatly exceeding that in the core region. This was pointed out in simulations of JET plasmas with varying divertor geometry, where the magnetic configuration...
Uploaded on: March 25, 2023