Comparison of Particle Transport and Confinement Properties Between the ICRH and NBI Heated Dimensionless Identity Plasmas on JET

Antti Salmi, E. R. Solano, I.S. Carvalho, J. Citrin, A. Chomiczewska, E. Delabie, F. Eriksson, J. Ferreira, Emil Fransson, L. Horvath, P. Jacquet, Anu Kirjasuo, S. Leerink, E. Lerche, C. Maggi, P. Mantica, A. Mariani, M. Maslov, S. Menmuir, R.B. MoralesV. Naulin, M.F.F. Nave, H. Normand, C. Perez Von Thun, P.A. Scheider, M. Sertoli, Tuomas Tala

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsScientific

Abstract

The density peaking was studied in the ICRH versus the NBI identity plasmas and results in R/Ln=0.45 for the ICRH shot and R/Ln=0.93 for the NBI shot. The dimensionless profiles of q, ρ*, υ*, βn and Ti/Te≈1 were matched within 5% difference except in the central part of the plasma (ρtor<0.3). The difference in the curvature pinch (same q-profile) and thermo-pinch (Ti=Te) between the ICRH and NBI shots is virtually zero. The ICRH and NBI heated identity plasmas yield similar plasma parameters and performance in the core plasma (0.3<ρtor<0.8). This result is valid at 8MW of heating power level, however, it remains to be seen how this promising result will scale to larger power levels and to larger devices. The identity experiment shows that NBI fuelling increases the density peaking by a factor of 2. This number may be modified due to different rotation, fast ion content or impurities which will be assessed in future.
Original languageEnglish
Title of host publication28th IAEA Fusion Energy Conference 10-15 May 2021 Virtual Event
Subtitle of host publicationProgramme, Contributions, and Conference Material
PublisherInternational Atomic Energy Agency IAEA
Number of pages8
Publication statusPublished - 2021
MoE publication typeNot Eligible
Event28th IAEA Fusion Energy Conference - virtual
Duration: 10 May 202115 May 2021
https://www.iaea.org/events/fec-2020

Conference

Conference28th IAEA Fusion Energy Conference
Abbreviated titleFEC 2020
Period10/05/2115/05/21
Internet address

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