Recent progress in L-H transition studies at JET : tritium, helium, hydrogen and deuterium

Solano, E. R.; Delabie, E.; Birkenmeier, G.; Silva, C.; Hillesheim, J. C.; Vincenzi, P.; Nielsen, A. H.; Rasmussen, J. Juul; Baciero, A.; Aleiferis, S.; Balboa, I.; Boboc, A.; Bourdelle, C.; Carvalho, I. S.; Carvalho, P.; Chernyshova, M.; Coelho, R.; Craciunescu, T.; Dumont, R.; Dumortier, P.; de la Luna, E.; Flanagan, J.; Fontana, M.; Fontdecaba, J. M.; Frassinetti, L.; Gallart, D.; Garcia, J.; Giovannozzi, E.; Giroud, C.; Gromelski, W.; Henriques, R.; Horvath, L.; Jacquet, P.; Jepu, I.; Kappatou, A.; Keeling, D. L.; King, D.; Kowalska-Strzeciwilk, E.; Lennholm, M.; Lerche, E.; Litherland-Smith, E.; Kiptily, V.; Kirov, K.; Loarte, A.; Lomanowski, B.; Maggi, C. F.; Mantsinen, M. J.; Manzanares, A.; Maslov, M.; Meigs, A. G.; Monakhov, I.; Morales, R. B.; Nina, D.; Noble, C.; Parail, V.; Diaz, F. Parra; Pawelec, E.; Pucella, G.; Refy, D.; Righi-Steele, E.; Rimini, F. G.; Robinson, T.; Saarelma, S.; Sertoli, M.; Shaw, A.; Silburn, S.; Siren, P.; Stancar, Z.; Sun, H.; Szepesi, G.; Taylor, D.; Tholerus, E.; Vartanian, S.; Verdoolaege, Geert; Viola, B.; Weisen, H.; Wilson, T.

Recent progress in L-H transition studies at JET : tritium, helium, hydrogen and deuterium

E. R. Solano, E. Delabie, G. Birkenmeier, C. Silva, J. C. Hillesheim, P. Vincenzi, A. H. Nielsen, J. Juul Rasmussen, A. Baciero, S. Aleiferis, et al.

(2022) NUCLEAR FUSION. 62(7).

Author

E. R. Solano, E. Delabie, G. Birkenmeier, C. Silva, J. C. Hillesheim, P. Vincenzi, A. H. Nielsen, J. Juul Rasmussen, A. Baciero, S. Aleiferis, I. Balboa, A. Boboc, C. Bourdelle, I. S. Carvalho, P. Carvalho, M. Chernyshova, R. Coelho, T. Craciunescu, R. Dumont, P. Dumortier, E. de la Luna, J. Flanagan, M. Fontana, J. M. Fontdecaba, L. Frassinetti, D. Gallart, J. Garcia, E. Giovannozzi, C. Giroud, W. Gromelski, R. Henriques, L. Horvath, P. Jacquet, I. Jepu, A. Kappatou, D. L. Keeling, D. King, E. Kowalska-Strzeciwilk, M. Lennholm, E. Lerche, E. Litherland-Smith, V. Kiptily, K. Kirov, A. Loarte, B. Lomanowski, C. F. Maggi, M. J. Mantsinen, A. Manzanares, M. Maslov, A. G. Meigs, I. Monakhov, R. B. Morales, D. Nina, C. Noble, V. Parail, F. Parra Diaz, E. Pawelec, G. Pucella, D. Refy, E. Righi-Steele, F. G. Rimini, T. Robinson, S. Saarelma, M. Sertoli, A. Shaw, S. Silburn, P. Siren, Z. Stancar, H. Sun, G. Szepesi, D. Taylor, E. Tholerus, S. Vartanian, Geert Verdoolaege (UGent) , B. Viola, H. Weisen and T. Wilson

Organization

Department of Applied physics

Project

EUROfusion

Abstract

We present an overview of results from a series of L-II transition experiments undertaken at JET since the installation of the ITER-like-wall (JET-ILW), with beryllium wall tiles and a tungsten divertor. Tritium, helium and deuterium plasmas have been investigated. Initial results in tritium show ohmic L-H transitions at low density and the power threshold for the L-H transition (P-LH) is lower in tritium plasmas than in deuterium ones at low densities, while we still lack contrasted data to provide a scaling at high densities. In helium plasmas there is a notable shift of the density at which the power threshold is minimum ((n) over bar (e,min)) to higher values relative to deuterium and hydrogen references. Above (n) over bar (e,min) (He) the L-H power threshold at high densities is similar for D and He plasmas. Transport modelling in slab geometry shows that in helium neoclassical transport competes with interchange-driven transport, unlike in hydrogen isotopes. Measurements of the radial electric field in deuterium plasmas show that E-r shear is not a good indicator of proximity to the L-H transition. Transport analysis of ion heat flux in deuterium plasmas show a non-linearity as density is decreased below (n) over bar (e,min). Lastly, a regression of the JET-ILW deuterium data is compared to the 2008 ITPA scaling law.

Keywords

L-H transition, tritium, helium, isotope

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Citation

Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01GV0ZY6WWN37CTBV4QRXDJAXJ

MLA: Solano, E. R., et al. “Recent Progress in L-H Transition Studies at JET : Tritium, Helium, Hydrogen and Deuterium.” NUCLEAR FUSION, vol. 62, no. 7, 2022, doi:10.1088/1741-4326/ac4ed8.
APA: Solano, E. R., Delabie, E., Birkenmeier, G., Silva, C., Hillesheim, J. C., Vincenzi, P., … Wilson, T. (2022). Recent progress in L-H transition studies at JET : tritium, helium, hydrogen and deuterium. NUCLEAR FUSION, 62(7). https://doi.org/10.1088/1741-4326/ac4ed8
Chicago author-date: Solano, E. R., E. Delabie, G. Birkenmeier, C. Silva, J. C. Hillesheim, P. Vincenzi, A. H. Nielsen, et al. 2022. “Recent Progress in L-H Transition Studies at JET : Tritium, Helium, Hydrogen and Deuterium.” NUCLEAR FUSION 62 (7). https://doi.org/10.1088/1741-4326/ac4ed8.
Chicago author-date (all authors): Solano, E. R., E. Delabie, G. Birkenmeier, C. Silva, J. C. Hillesheim, P. Vincenzi, A. H. Nielsen, J. Juul Rasmussen, A. Baciero, S. Aleiferis, I. Balboa, A. Boboc, C. Bourdelle, I. S. Carvalho, P. Carvalho, M. Chernyshova, R. Coelho, T. Craciunescu, R. Dumont, P. Dumortier, E. de la Luna, J. Flanagan, M. Fontana, J. M. Fontdecaba, L. Frassinetti, D. Gallart, J. Garcia, E. Giovannozzi, C. Giroud, W. Gromelski, R. Henriques, L. Horvath, P. Jacquet, I. Jepu, A. Kappatou, D. L. Keeling, D. King, E. Kowalska-Strzeciwilk, M. Lennholm, E. Lerche, E. Litherland-Smith, V. Kiptily, K. Kirov, A. Loarte, B. Lomanowski, C. F. Maggi, M. J. Mantsinen, A. Manzanares, M. Maslov, A. G. Meigs, I. Monakhov, R. B. Morales, D. Nina, C. Noble, V. Parail, F. Parra Diaz, E. Pawelec, G. Pucella, D. Refy, E. Righi-Steele, F. G. Rimini, T. Robinson, S. Saarelma, M. Sertoli, A. Shaw, S. Silburn, P. Siren, Z. Stancar, H. Sun, G. Szepesi, D. Taylor, E. Tholerus, S. Vartanian, Geert Verdoolaege, B. Viola, H. Weisen, and T. Wilson. 2022. “Recent Progress in L-H Transition Studies at JET : Tritium, Helium, Hydrogen and Deuterium.” NUCLEAR FUSION 62 (7). doi:10.1088/1741-4326/ac4ed8.
Vancouver: 1.
Solano ER, Delabie E, Birkenmeier G, Silva C, Hillesheim JC, Vincenzi P, et al. Recent progress in L-H transition studies at JET : tritium, helium, hydrogen and deuterium. NUCLEAR FUSION. 2022;62(7).
IEEE: [1]
E. R. Solano et al., “Recent progress in L-H transition studies at JET : tritium, helium, hydrogen and deuterium,” NUCLEAR FUSION, vol. 62, no. 7, 2022.

@article{01GV0ZY6WWN37CTBV4QRXDJAXJ,
  abstract     = {{We present an overview of results from a series of L-II transition experiments undertaken at JET since the installation of the ITER-like-wall (JET-ILW), with beryllium wall tiles and a tungsten divertor. Tritium, helium and deuterium plasmas have been investigated. Initial results in tritium show ohmic L-H transitions at low density and the power threshold for the L-H transition (P-LH) is lower in tritium plasmas than in deuterium ones at low densities, while we still lack contrasted data to provide a scaling at high densities. In helium plasmas there is a notable shift of the density at which the power threshold is minimum ((n) over bar (e,min)) to higher values relative to deuterium and hydrogen references. Above (n) over bar (e,min) (He) the L-H power threshold at high densities is similar for D and He plasmas. Transport modelling in slab geometry shows that in helium neoclassical transport competes with interchange-driven transport, unlike in hydrogen isotopes. Measurements of the radial electric field in deuterium plasmas show that E-r shear is not a good indicator of proximity to the L-H transition. Transport analysis of ion heat flux in deuterium plasmas show a non-linearity as density is decreased below (n) over bar (e,min). Lastly, a regression of the JET-ILW deuterium data is compared to the 2008 ITPA scaling law.}},
  articleno    = {{076026}},
  author       = {{Solano, E. R. and  Delabie, E. and  Birkenmeier, G. and  Silva, C. and  Hillesheim, J. C. and  Vincenzi, P. and  Nielsen, A. H. and  Rasmussen, J. Juul and  Baciero, A. and  Aleiferis, S. and  Balboa, I. and  Boboc, A. and  Bourdelle, C. and  Carvalho, I. S. and  Carvalho, P. and  Chernyshova, M. and  Coelho, R. and  Craciunescu, T. and  Dumont, R. and  Dumortier, P. and  de la Luna, E. and  Flanagan, J. and  Fontana, M. and  Fontdecaba, J. M. and  Frassinetti, L. and  Gallart, D. and  Garcia, J. and  Giovannozzi, E. and  Giroud, C. and  Gromelski, W. and  Henriques, R. and  Horvath, L. and  Jacquet, P. and  Jepu, I. and  Kappatou, A. and  Keeling, D. L. and  King, D. and  Kowalska-Strzeciwilk, E. and  Lennholm, M. and  Lerche, E. and  Litherland-Smith, E. and  Kiptily, V. and  Kirov, K. and  Loarte, A. and  Lomanowski, B. and  Maggi, C. F. and  Mantsinen, M. J. and  Manzanares, A. and  Maslov, M. and  Meigs, A. G. and  Monakhov, I. and  Morales, R. B. and  Nina, D. and  Noble, C. and  Parail, V. and  Diaz, F. Parra and  Pawelec, E. and  Pucella, G. and  Refy, D. and  Righi-Steele, E. and  Rimini, F. G. and  Robinson, T. and  Saarelma, S. and  Sertoli, M. and  Shaw, A. and  Silburn, S. and  Siren, P. and  Stancar, Z. and  Sun, H. and  Szepesi, G. and  Taylor, D. and  Tholerus, E. and  Vartanian, S. and Verdoolaege, Geert and  Viola, B. and  Weisen, H. and  Wilson, T.}},
  issn         = {{0029-5515}},
  journal      = {{NUCLEAR FUSION}},
  keywords     = {{L-H transition,tritium,helium,isotope}},
  language     = {{eng}},
  number       = {{7}},
  pages        = {{11}},
  title        = {{Recent progress in L-H transition studies at JET : tritium, helium, hydrogen and deuterium}},
  url          = {{http://doi.org/10.1088/1741-4326/ac4ed8}},
  volume       = {{62}},
  year         = {{2022}},
}

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Recent progress in L-H transition studies at JET : tritium, helium, hydrogen and deuterium

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