On the challenge of plasma heating with the JET metallic wall

M. -L. Mayoral, V. Bobkov, A. Czarnecka, I. Day, A. Ekedahl, P. Jacquet, M. Goniche, R. King, K. Kirov, E. Lerche, J. Mailloux, D. Van Eester, O. Asunta, C. Challis, D. Ciric, J.W. Coenen, L. Colas, C. Giroud, M. Graham, I. Jenkins & 21 others E. Joffrin, T. Jones, D. King, V. Kiptily, C. C. Klepper, C. Maggi, R. Maggiora, F. Marcotte, G. Matthews, D. Milanesio, I. Monakhov, M. Nightingale, R. Neu, J. Ongena, T. Puetterich, V. Riccardo, F. Rimini, J. Strachan, E. Surrey, V. Thompson, G.J. van Rooij

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

The major aspects linked to the use of the JET auxiliary heating systems: NBI, ICRF and LHCD, in the new JET ITER-like wall are presented. We show that although there were issues related to the operation of each system, efficient and safe plasma heating was obtained with room for higher power. For the NBI up to 25.7 MW was safely injected; issues that had to be tackled were mainly the beam shine-through and beam re-ionization before its entrance into the plasma. For the ICRF system, 5 MW were coupled in L-mode and 4 MW in H-mode; the main areas of concern were RF sheaths related heat loads and impurities production. For the LH, 2.5 MW were delivered without problems; arcing and generation of fast electron beams in front of the launcher that can lead to high heat loads were the keys issues. For each system, an overview will be given of: the main modifications implemented for safe use, their compatibility with the new metallic wall, the differences in behaviour compared with the previous carbon wall, with emphasis on heat loads and impurity content in the plasma.
LanguageEnglish
Number of pages14
JournalNuclear Fusion
Volume54
Issue number3
DOIs
StatePublished - Mar 2014
Externally publishedYes

Keywords

  • JET
  • ILW
  • plasma heating
  • NBI
  • ICRF
  • LHCD

Cite this

Mayoral, M. -L., Bobkov, V., Czarnecka, A., Day, I., Ekedahl, A., Jacquet, P., ... van Rooij, G. J. (2014). On the challenge of plasma heating with the JET metallic wall. Nuclear Fusion, 54(3). DOI: 10.1088/0029-5515/54/3/033002
Mayoral, M. -L. ; Bobkov, V. ; Czarnecka, A. ; Day, I. ; Ekedahl, A. ; Jacquet, P. ; Goniche, M. ; King, R. ; Kirov, K. ; Lerche, E. ; Mailloux, J. ; Van Eester, D. ; Asunta, O. ; Challis, C. ; Ciric, D. ; Coenen, J.W. ; Colas, L. ; Giroud, C. ; Graham, M. ; Jenkins, I. ; Joffrin, E. ; Jones, T. ; King, D. ; Kiptily, V. ; Klepper, C. C. ; Maggi, C. ; Maggiora, R. ; Marcotte, F. ; Matthews, G. ; Milanesio, D. ; Monakhov, I. ; Nightingale, M. ; Neu, R. ; Ongena, J. ; Puetterich, T. ; Riccardo, V. ; Rimini, F. ; Strachan, J. ; Surrey, E. ; Thompson, V. ; van Rooij, G.J./ On the challenge of plasma heating with the JET metallic wall. In: Nuclear Fusion. 2014 ; Vol. 54, No. 3.
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abstract = "The major aspects linked to the use of the JET auxiliary heating systems: NBI, ICRF and LHCD, in the new JET ITER-like wall are presented. We show that although there were issues related to the operation of each system, efficient and safe plasma heating was obtained with room for higher power. For the NBI up to 25.7 MW was safely injected; issues that had to be tackled were mainly the beam shine-through and beam re-ionization before its entrance into the plasma. For the ICRF system, 5 MW were coupled in L-mode and 4 MW in H-mode; the main areas of concern were RF sheaths related heat loads and impurities production. For the LH, 2.5 MW were delivered without problems; arcing and generation of fast electron beams in front of the launcher that can lead to high heat loads were the keys issues. For each system, an overview will be given of: the main modifications implemented for safe use, their compatibility with the new metallic wall, the differences in behaviour compared with the previous carbon wall, with emphasis on heat loads and impurity content in the plasma.",
keywords = "JET, ILW, plasma heating, NBI, ICRF, LHCD",
author = "Mayoral, {M. -L.} and V. Bobkov and A. Czarnecka and I. Day and A. Ekedahl and P. Jacquet and M. Goniche and R. King and K. Kirov and E. Lerche and J. Mailloux and {Van Eester}, D. and O. Asunta and C. Challis and D. Ciric and J.W. Coenen and L. Colas and C. Giroud and M. Graham and I. Jenkins and E. Joffrin and T. Jones and D. King and V. Kiptily and Klepper, {C. C.} and C. Maggi and R. Maggiora and F. Marcotte and G. Matthews and D. Milanesio and I. Monakhov and M. Nightingale and R. Neu and J. Ongena and T. Puetterich and V. Riccardo and F. Rimini and J. Strachan and E. Surrey and V. Thompson and {van Rooij}, G.J.",
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Mayoral, M-L, Bobkov, V, Czarnecka, A, Day, I, Ekedahl, A, Jacquet, P, Goniche, M, King, R, Kirov, K, Lerche, E, Mailloux, J, Van Eester, D, Asunta, O, Challis, C, Ciric, D, Coenen, JW, Colas, L, Giroud, C, Graham, M, Jenkins, I, Joffrin, E, Jones, T, King, D, Kiptily, V, Klepper, CC, Maggi, C, Maggiora, R, Marcotte, F, Matthews, G, Milanesio, D, Monakhov, I, Nightingale, M, Neu, R, Ongena, J, Puetterich, T, Riccardo, V, Rimini, F, Strachan, J, Surrey, E, Thompson, V & van Rooij, GJ 2014, 'On the challenge of plasma heating with the JET metallic wall' Nuclear Fusion, vol. 54, no. 3. DOI: 10.1088/0029-5515/54/3/033002

On the challenge of plasma heating with the JET metallic wall. / Mayoral, M. -L.; Bobkov, V.; Czarnecka, A.; Day, I.; Ekedahl, A.; Jacquet, P.; Goniche, M.; King, R.; Kirov, K.; Lerche, E.; Mailloux, J.; Van Eester, D.; Asunta, O.; Challis, C.; Ciric, D.; Coenen, J.W.; Colas, L.; Giroud, C.; Graham, M.; Jenkins, I.; Joffrin, E.; Jones, T.; King, D.; Kiptily, V.; Klepper, C. C.; Maggi, C.; Maggiora, R.; Marcotte, F.; Matthews, G.; Milanesio, D.; Monakhov, I.; Nightingale, M.; Neu, R.; Ongena, J.; Puetterich, T.; Riccardo, V.; Rimini, F.; Strachan, J.; Surrey, E.; Thompson, V.; van Rooij, G.J.

In: Nuclear Fusion, Vol. 54, No. 3, 03.2014.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - On the challenge of plasma heating with the JET metallic wall

AU - Mayoral,M. -L.

AU - Bobkov,V.

AU - Czarnecka,A.

AU - Day,I.

AU - Ekedahl,A.

AU - Jacquet,P.

AU - Goniche,M.

AU - King,R.

AU - Kirov,K.

AU - Lerche,E.

AU - Mailloux,J.

AU - Van Eester,D.

AU - Asunta,O.

AU - Challis,C.

AU - Ciric,D.

AU - Coenen,J.W.

AU - Colas,L.

AU - Giroud,C.

AU - Graham,M.

AU - Jenkins,I.

AU - Joffrin,E.

AU - Jones,T.

AU - King,D.

AU - Kiptily,V.

AU - Klepper,C. C.

AU - Maggi,C.

AU - Maggiora,R.

AU - Marcotte,F.

AU - Matthews,G.

AU - Milanesio,D.

AU - Monakhov,I.

AU - Nightingale,M.

AU - Neu,R.

AU - Ongena,J.

AU - Puetterich,T.

AU - Riccardo,V.

AU - Rimini,F.

AU - Strachan,J.

AU - Surrey,E.

AU - Thompson,V.

AU - van Rooij,G.J.

PY - 2014/3

Y1 - 2014/3

N2 - The major aspects linked to the use of the JET auxiliary heating systems: NBI, ICRF and LHCD, in the new JET ITER-like wall are presented. We show that although there were issues related to the operation of each system, efficient and safe plasma heating was obtained with room for higher power. For the NBI up to 25.7 MW was safely injected; issues that had to be tackled were mainly the beam shine-through and beam re-ionization before its entrance into the plasma. For the ICRF system, 5 MW were coupled in L-mode and 4 MW in H-mode; the main areas of concern were RF sheaths related heat loads and impurities production. For the LH, 2.5 MW were delivered without problems; arcing and generation of fast electron beams in front of the launcher that can lead to high heat loads were the keys issues. For each system, an overview will be given of: the main modifications implemented for safe use, their compatibility with the new metallic wall, the differences in behaviour compared with the previous carbon wall, with emphasis on heat loads and impurity content in the plasma.

AB - The major aspects linked to the use of the JET auxiliary heating systems: NBI, ICRF and LHCD, in the new JET ITER-like wall are presented. We show that although there were issues related to the operation of each system, efficient and safe plasma heating was obtained with room for higher power. For the NBI up to 25.7 MW was safely injected; issues that had to be tackled were mainly the beam shine-through and beam re-ionization before its entrance into the plasma. For the ICRF system, 5 MW were coupled in L-mode and 4 MW in H-mode; the main areas of concern were RF sheaths related heat loads and impurities production. For the LH, 2.5 MW were delivered without problems; arcing and generation of fast electron beams in front of the launcher that can lead to high heat loads were the keys issues. For each system, an overview will be given of: the main modifications implemented for safe use, their compatibility with the new metallic wall, the differences in behaviour compared with the previous carbon wall, with emphasis on heat loads and impurity content in the plasma.

KW - JET

KW - ILW

KW - plasma heating

KW - NBI

KW - ICRF

KW - LHCD

U2 - 10.1088/0029-5515/54/3/033002

DO - 10.1088/0029-5515/54/3/033002

M3 - Article

VL - 54

JO - Nuclear Fusion

T2 - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 3

ER -

Mayoral M-L, Bobkov V, Czarnecka A, Day I, Ekedahl A, Jacquet P et al. On the challenge of plasma heating with the JET metallic wall. Nuclear Fusion. 2014 Mar;54(3). Available from, DOI: 10.1088/0029-5515/54/3/033002