skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Isotope identity experiments in JET-ILW with H and D L-mode plasmas

Abstract

NBI-heated L-mode plasmas have been obtained in JET with the Be/W ITER-like wall (JET-ILW) 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 in the core confinement region of these plasmas, where the dominant instabilities are Ion Temperature Gradient (ITG) modes. The dimensionless thermal energy confinement time, Ωi τE,th, and the scaled core plasma heat diffusivity, A χeff/BT, are identical in H and D within error bars, indicating lack of isotope mass dependence of the dimensionless L-mode thermal energy confinement time in JET-ILW. Predictive flux driven simulations with JETTO-TGLF of the H and D identity pair is in very good agreement with experiment for both isotopes: the stiff core heat transport, typical of JET-ILW NBI heated L-modes, overcomes the local gyro-Bohm scaling of gradient-driven TGLF, explaining the lack of isotope mass dependence in the confinement region of these plasmas. The effect of E × B shearing on the predicted heat and particle transport channels is found to be negligible for these low beta and low momentum input plasmas.

Authors:
ORCiD logo [1];  [2];  [1]; ORCiD logo [3];  [3];  [4]; ORCiD logo [5]; ORCiD logo [4];  [1];  [1];  [1]; ORCiD logo [6];  [1];  [7];  [8];  [7];  [1]
  1. Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE)
  2. Ecole Polytechnique Federale Lausanne (Switzerland)
  3. Consorzio RFX, Padova (Italy)
  4. Chalmers University of Technology, Göteborg (Sweden)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. Univ. of York (United Kingdom)
  7. VTT Technical Research Centre of Finland (Finland)
  8. European Commission, Brussels (Belgium)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1811413
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 59; Journal Issue: 7; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Maggi, C. F., Weisen, H., Casson, F. J., Auriemma, F., Lorenzini, R., Nordman, H., Delabie, E., Eriksson, F., Flanagan, J., Keeling, D., King, D., Horvath, L., Menmuir, S., Salmi, A., Sips, G., Tala, T., and Voitsekhovich, I.. Isotope identity experiments in JET-ILW with H and D L-mode plasmas. United States: N. p., 2019. Web. https://doi.org/10.1088/1741-4326/ab1ccd.
Maggi, C. F., Weisen, H., Casson, F. J., Auriemma, F., Lorenzini, R., Nordman, H., Delabie, E., Eriksson, F., Flanagan, J., Keeling, D., King, D., Horvath, L., Menmuir, S., Salmi, A., Sips, G., Tala, T., & Voitsekhovich, I.. Isotope identity experiments in JET-ILW with H and D L-mode plasmas. United States. https://doi.org/10.1088/1741-4326/ab1ccd
Maggi, C. F., Weisen, H., Casson, F. J., Auriemma, F., Lorenzini, R., Nordman, H., Delabie, E., Eriksson, F., Flanagan, J., Keeling, D., King, D., Horvath, L., Menmuir, S., Salmi, A., Sips, G., Tala, T., and Voitsekhovich, I.. Fri . "Isotope identity experiments in JET-ILW with H and D L-mode plasmas". United States. https://doi.org/10.1088/1741-4326/ab1ccd. https://www.osti.gov/servlets/purl/1811413.
@article{osti_1811413,
title = {Isotope identity experiments in JET-ILW with H and D L-mode plasmas},
author = {Maggi, C. F. and Weisen, H. and Casson, F. J. and Auriemma, F. and Lorenzini, R. and Nordman, H. and Delabie, E. and Eriksson, F. and Flanagan, J. and Keeling, D. and King, D. and Horvath, L. and Menmuir, S. and Salmi, A. and Sips, G. and Tala, T. and Voitsekhovich, I.},
abstractNote = {NBI-heated L-mode plasmas have been obtained in JET with the Be/W ITER-like wall (JET-ILW) 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 in the core confinement region of these plasmas, where the dominant instabilities are Ion Temperature Gradient (ITG) modes. The dimensionless thermal energy confinement time, Ωi τE,th, and the scaled core plasma heat diffusivity, A χeff/BT, are identical in H and D within error bars, indicating lack of isotope mass dependence of the dimensionless L-mode thermal energy confinement time in JET-ILW. Predictive flux driven simulations with JETTO-TGLF of the H and D identity pair is in very good agreement with experiment for both isotopes: the stiff core heat transport, typical of JET-ILW NBI heated L-modes, overcomes the local gyro-Bohm scaling of gradient-driven TGLF, explaining the lack of isotope mass dependence in the confinement region of these plasmas. The effect of E × B shearing on the predicted heat and particle transport channels is found to be negligible for these low beta and low momentum input plasmas.},
doi = {10.1088/1741-4326/ab1ccd},
journal = {Nuclear Fusion},
number = 7,
volume = 59,
place = {United States},
year = {2019},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share:

Works referenced in this record:

Dependence of L mode confinement on plasma ion species in JET
journal, September 1993


Carbon charge exchange analysis in the ITER-like wall environment
journal, November 2014

  • Menmuir, S.; Giroud, C.; Biewer, T. M.
  • Review of Scientific Instruments, Vol. 85, Issue 11
  • DOI: 10.1063/1.4890118

Dependence of the turbulent particle flux on hydrogen isotopes induced by collisionality
journal, August 2018

  • Angioni, C.; Fable, E.; Manas, P.
  • Physics of Plasmas, Vol. 25, Issue 8
  • DOI: 10.1063/1.5045545

Scaling laws for plasma confinement
journal, October 1977


Isotope effects on L-H threshold and confinement in tokamak plasmas
journal, November 2017

  • Maggi, C. F.; Weisen, H.; Hillesheim, J. C.
  • Plasma Physics and Controlled Fusion, Vol. 60, Issue 1
  • DOI: 10.1088/1361-6587/aa9901

Non-inductively driven currents in JET
journal, April 1989


Isotope identity experiments in JET
journal, May 2000


New techniques for calculating heat and particle source rates due to neutral beam injection in axisymmetric tokamaks
journal, September 1981


Fuel retention studies with the ITER-Like Wall in JET
journal, July 2013


JINTRAC: A System of Codes for Integrated Simulation of Tokamak Scenarios
journal, January 2014

  • Romanelli, Michele; Corrigan, Gerard; Parail, Vassili
  • Plasma and Fusion Research, Vol. 9, Issue 0
  • DOI: 10.1585/pfr.9.3403023

A model of the saturation of coupled electron and ion scale gyrokinetic turbulence
journal, May 2017


Status of the JET LIDAR Thomson scattering diagnostic
journal, November 2013


A theory-based transport model with comprehensive physics
journal, May 2007

  • Staebler, G. M.; Kinsey, J. E.; Waltz, R. E.
  • Physics of Plasmas, Vol. 14, Issue 5
  • DOI: 10.1063/1.2436852

Effect of isotope mass on transport simulations of Joint European Torus high-mode plasmas with Edge Localized Modes
journal, December 1999

  • Bateman, Glenn; Kritz, Arnold H.; Parail, Vassili V.
  • Physics of Plasmas, Vol. 6, Issue 12
  • DOI: 10.1063/1.873724

Overview of the JET results in support to ITER
journal, June 2017


Plasma confinement in JET H mode plasmas with H, D, DT and T isotopes
journal, March 1999


High resolution Thomson scattering for Joint European Torus (JET)
journal, October 2004

  • Pasqualotto, R.; Nielsen, P.; Gowers, C.
  • Review of Scientific Instruments, Vol. 75, Issue 10
  • DOI: 10.1063/1.1787922

Electron cyclotron emission radiometer upgrade on the Joint European Torus (JET) tokamak
journal, October 2004

  • Luna, E. de la; Sánchez, J.; Tribaldos, V.
  • Review of Scientific Instruments, Vol. 75, Issue 10
  • DOI: 10.1063/1.1781376

    Works referencing / citing this record:

    Isotope Effect on Energy Confinement Time and Thermal Transport in Neutral-Beam-Heated Stellarator-Heliotron Plasmas
    journal, October 2019


    Role of fast ion pressure in the isotope effect in JET L-mode plasmas
    journal, July 2019


    Density peaking in JET—determined by fuelling or transport?
    journal, October 2019


    Overview of the JET preparation for deuterium–tritium operation with the ITER like-wall
    text, January 2019


    Extended investigations of isotope effects on ECRH plasma in LHD
    journal, December 2019

    • Tanaka, K.; Nakata, M.; Ohtani, Y.
    • Plasma Physics and Controlled Fusion, Vol. 62, Issue 2
    • DOI: 10.1088/1361-6587/ab5bae