L-H transition threshold studies in helium plasmas at JET

E. R. Solano, G. Birkenmeier, E. Delabie, C. Silva, J. C. Hillesheim, A. Boboc, I. S. Carvalho, P. Carvalho, M. Chernyshova, T. Craciunescu, E. De La Luna, J. M. Fontdecaba, R. Henriques, P. Jacquet, I. Jepu, A. Kappatou, D. King, M. Lennholm, E. Lerche, E. Litherland-SmithA. Loarte, M. Maslov, F. Parra Diaz, V. Parail, E. Pawelec, F. G. Rimini, A. Shaw, P. Siren, G. Szepesi, Štancar, E. Tholerus, S. Vartanian, B. Viola, H. Weisen

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


We present a study of the power threshold for L-H transitions (P LH) in almost pure helium plasmas, obtained in recent experiments at JET with an ITER-like wall (Be wall and W divertor). The most notable new result is that the density at which P LH is minimum, is considerably higher for helium than for deuterium and hydrogen plasmas. We discuss the possible implications for ITER in its pre-fusion operating power phase.

Original languageEnglish (US)
Article number124001
JournalNuclear Fusion
Issue number12
StatePublished - Dec 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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