UKAEA Papers

"Improved EDGE2D-EIRENE Simulations of JET ITER-like Wall L-mode Discharges Utilising Poloidal VUV/visible Spectral Emission Profiles"

• K.D. Lawson
• M. Groth
• P. Belo
• S. Brezinsek
• G. Corrigan
• A. Czarnecka
• E. Delabie
• P. Drewelow
• D. Harting
• I. KsiaSek
• C.F. Maggi
• C. Marchetto
• A.G. Meigs
• S. Menmuir
• M.F. Stamp
• S. Wiesen
• JET-EFDA Contributors

A discrepancy in the divertor radiated powers between EDGE2D-EIRENE simulations, both with and without drifts, and JET-ILW experiments employing a set of NBI-heated L-mode discharges with step-wise density variation is investigated. Results from a VUV/visible poloidally scanning spectrometer are used together with bolometric measurements to determi…

"Intra-ELM Phase Modelling of a JET ITER-like Wall H-mode Discharge with EDGE2D-EIRENE"

• D.M. Harting
• S. Wiesen
• M. Groth
• S. Brezinsek
• G. Corrigan
• G. Arnoux
• P. Boerner
• S. Devaux
• J. Flanagan
• A. Järvinen
• S. Marsen
• D. Reiter
• JET-EFDA contributors

We present the application of an improved EDGE2D-EIRENE SOL transport model for the ELM phase utilizing kinetic correction of the sheath-heat-transmission coefficients and heat-flux-limiting factors used in fluid SOL modelling. With a statistical analysis over a range of similar Type-I ELMy H-mode discharges performed at the end of the first JET IT…

"The effects of impurities and core pressure on pedestal stability in Joint European Torus (JET)"

• S. Saarelma
• A. Järvinen
• M. Beurskens
• C. Challis
• L. Frassinetti
• C. Giroud
• M. Groth
• M. Leyland
• C. Maggi
• J. Simpson
• JET Contributors

The H-mode pedestal plays an important role in determining global confinement in tokamaks. In high triangularity H-mode experiments in Joint European Torus with the ITER-like wall (JET-ILW), significantly higher pedestal temperature and global confinement have been achieved with nitrogen seeding. The experimentally observed increase in pedestal hei…

"Improved Interpretation of Stark Broadening Data from Detached Divertor Plasmas"

• S. Lisgo
• N. Brooks
• E. Oks
• M. Groth
• A. W. Leonard
• et al.