Divertor plasma conditions and neutral dynamics in horizontal and vertical divertor configurations in JET-ILW low confinement mode plasmas

M. Groth; S. Brezinsek; P. Belo; M. Brix; G. Calabro; A. Chankin; M. Clever; J. W. Coenen; G. Corrigan; P. Drewelow; C. Guillemaut; D. Harting; A. Huber; S. Jachmich; Aaro Järvinen; U. Kruezi; K. D. Lawson; M. Lehnen; C. F. Maggi; C. Marchetto; S. Marsen; F. Maviglia; A. G. Meigs; D. Moulton; C. Silva; M. F. Stamp; S. Wiesen; The EFDA-JET Contributors

doi:10.1016/j.jnucmat.2014.12.030

Divertor plasma conditions and neutral dynamics in horizontal and vertical divertor configurations in JET-ILW low confinement mode plasmas

M. Groth^*
, S. Brezinsek
, P. Belo
, M. Brix
, G. Calabro
, A. Chankin
, M. Clever
, J. W. Coenen
, G. Corrigan
, P. Drewelow
, C. Guillemaut
, D. Harting
, A. Huber
, S. Jachmich
, Aaro Järvinen
, U. Kruezi
, K. D. Lawson
, M. Lehnen
, C. F. Maggi
, C. Marchetto

S. Marsen, F. Maviglia, A. G. Meigs, D. Moulton, C. Silva, M. F. Stamp, S. Wiesen, The EFDA-JET Contributors

^*Corresponding author for this work

Not published at VTT

Aalto University
Forschungszentrum Jülich GmbH (FZJ)
Universidade de Lisboa
Culham Science Centre
National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA)
Max-Planck-Institut für Plasmaphysik (IPP)
Commissariat a l'Energie Atomique et aux Energies Alternatives (CEA)
École Royale Militaire
ITER Organization
National Research Council (CNR)
Association EURATOM-ENEA-CREATE

Research output: Contribution to journal › Article › Scientific › peer-review

27 Citations (Scopus)

Abstract

Measurements of the plasma conditions at the low field side target plate in JET ITER-like wall ohmic and low confinement mode plasmas show minor differences in divertor plasma configurations with horizontally and vertically inclined targets. Both the reduction of the electron temperature in the vicinity of the strike points and the rollover of the ion current to the plates follow the same functional dependence on the density at the low field side midplane. Configurations with vertically inclined target plates, however, produce twice as high sub-divertor pressures for the same upstream density. Simulations with the EDGE2D-EIRENE code package predict significantly lower plasma temperatures at the low field side target in vertical than in horizontal target configurations. Including cross-field drifts and imposing a pumping by-pass leak at the low-field side plate can still not recover the experimental observations.

Original language	English
Article number	48761
Pages (from-to)	471-476
Journal	Journal of Nuclear Materials
Volume	463
DOIs	https://doi.org/10.1016/j.jnucmat.2014.12.030
Publication status	Published - 22 Jul 2015
MoE publication type	A1 Journal article-refereed

Funding

This work was supported by EURATOM and carried out within the framework of the European Fusion Development Agreement. The views and opinions expressed herein do not necessarily reflect those of the European Commission and those of the ITER organisation.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

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10.1016/j.jnucmat.2014.12.030

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Groth, M., Brezinsek, S., Belo, P., Brix, M., Calabro, G., Chankin, A., Clever, M., Coenen, J. W., Corrigan, G., Drewelow, P., Guillemaut, C., Harting, D., Huber, A., Jachmich, S., Järvinen, A., Kruezi, U., Lawson, K. D., Lehnen, M., Maggi, C. F., ... The EFDA-JET Contributors (2015). Divertor plasma conditions and neutral dynamics in horizontal and vertical divertor configurations in JET-ILW low confinement mode plasmas. Journal of Nuclear Materials, 463, 471-476. Article 48761. https://doi.org/10.1016/j.jnucmat.2014.12.030

@article{83239edf7e484e6e8bd1765df2f7b1e5,

title = "Divertor plasma conditions and neutral dynamics in horizontal and vertical divertor configurations in JET-ILW low confinement mode plasmas",

abstract = "Measurements of the plasma conditions at the low field side target plate in JET ITER-like wall ohmic and low confinement mode plasmas show minor differences in divertor plasma configurations with horizontally and vertically inclined targets. Both the reduction of the electron temperature in the vicinity of the strike points and the rollover of the ion current to the plates follow the same functional dependence on the density at the low field side midplane. Configurations with vertically inclined target plates, however, produce twice as high sub-divertor pressures for the same upstream density. Simulations with the EDGE2D-EIRENE code package predict significantly lower plasma temperatures at the low field side target in vertical than in horizontal target configurations. Including cross-field drifts and imposing a pumping by-pass leak at the low-field side plate can still not recover the experimental observations.",

author = "M. Groth and S. Brezinsek and P. Belo and M. Brix and G. Calabro and A. Chankin and M. Clever and Coenen, \{J. W.\} and G. Corrigan and P. Drewelow and C. Guillemaut and D. Harting and A. Huber and S. Jachmich and Aaro J{\"a}rvinen and U. Kruezi and Lawson, \{K. D.\} and M. Lehnen and Maggi, \{C. F.\} and C. Marchetto and S. Marsen and F. Maviglia and Meigs, \{A. G.\} and D. Moulton and C. Silva and Stamp, \{M. F.\} and S. Wiesen and \{The EFDA-JET Contributors\}",

note = "Funding Information: This work was supported by EURATOM and carried out within the framework of the European Fusion Development Agreement. The views and opinions expressed herein do not necessarily reflect those of the European Commission and those of the ITER organisation. Publisher Copyright: {\textcopyright} 2015 EURATOM.",

year = "2015",

month = jul,

day = "22",

doi = "10.1016/j.jnucmat.2014.12.030",

language = "English",

volume = "463",

pages = "471--476",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

}

Groth, M, Brezinsek, S, Belo, P, Brix, M, Calabro, G, Chankin, A, Clever, M, Coenen, JW, Corrigan, G, Drewelow, P, Guillemaut, C, Harting, D, Huber, A, Jachmich, S, Järvinen, A, Kruezi, U, Lawson, KD, Lehnen, M, Maggi, CF, Marchetto, C, Marsen, S, Maviglia, F, Meigs, AG, Moulton, D, Silva, C, Stamp, MF, Wiesen, S & The EFDA-JET Contributors 2015, 'Divertor plasma conditions and neutral dynamics in horizontal and vertical divertor configurations in JET-ILW low confinement mode plasmas', Journal of Nuclear Materials, vol. 463, 48761, pp. 471-476. https://doi.org/10.1016/j.jnucmat.2014.12.030

TY - JOUR

T1 - Divertor plasma conditions and neutral dynamics in horizontal and vertical divertor configurations in JET-ILW low confinement mode plasmas

AU - Groth, M.

AU - Brezinsek, S.

AU - Belo, P.

AU - Brix, M.

AU - Calabro, G.

AU - Chankin, A.

AU - Clever, M.

AU - Coenen, J. W.

AU - Corrigan, G.

AU - Drewelow, P.

AU - Guillemaut, C.

AU - Harting, D.

AU - Huber, A.

AU - Jachmich, S.

AU - Järvinen, Aaro

AU - Kruezi, U.

AU - Lawson, K. D.

AU - Lehnen, M.

AU - Maggi, C. F.

AU - Marchetto, C.

AU - Marsen, S.

AU - Maviglia, F.

AU - Meigs, A. G.

AU - Moulton, D.

AU - Silva, C.

AU - Stamp, M. F.

AU - Wiesen, S.

AU - The EFDA-JET Contributors

N1 - Funding Information: This work was supported by EURATOM and carried out within the framework of the European Fusion Development Agreement. The views and opinions expressed herein do not necessarily reflect those of the European Commission and those of the ITER organisation. Publisher Copyright: © 2015 EURATOM.

PY - 2015/7/22

Y1 - 2015/7/22

N2 - Measurements of the plasma conditions at the low field side target plate in JET ITER-like wall ohmic and low confinement mode plasmas show minor differences in divertor plasma configurations with horizontally and vertically inclined targets. Both the reduction of the electron temperature in the vicinity of the strike points and the rollover of the ion current to the plates follow the same functional dependence on the density at the low field side midplane. Configurations with vertically inclined target plates, however, produce twice as high sub-divertor pressures for the same upstream density. Simulations with the EDGE2D-EIRENE code package predict significantly lower plasma temperatures at the low field side target in vertical than in horizontal target configurations. Including cross-field drifts and imposing a pumping by-pass leak at the low-field side plate can still not recover the experimental observations.

AB - Measurements of the plasma conditions at the low field side target plate in JET ITER-like wall ohmic and low confinement mode plasmas show minor differences in divertor plasma configurations with horizontally and vertically inclined targets. Both the reduction of the electron temperature in the vicinity of the strike points and the rollover of the ion current to the plates follow the same functional dependence on the density at the low field side midplane. Configurations with vertically inclined target plates, however, produce twice as high sub-divertor pressures for the same upstream density. Simulations with the EDGE2D-EIRENE code package predict significantly lower plasma temperatures at the low field side target in vertical than in horizontal target configurations. Including cross-field drifts and imposing a pumping by-pass leak at the low-field side plate can still not recover the experimental observations.

UR - https://www.scopus.com/pages/publications/84937738872

U2 - 10.1016/j.jnucmat.2014.12.030

DO - 10.1016/j.jnucmat.2014.12.030

M3 - Article

AN - SCOPUS:84937738872

SN - 0022-3115

VL - 463

SP - 471

EP - 476

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 48761

ER -

Divertor plasma conditions and neutral dynamics in horizontal and vertical divertor configurations in JET-ILW low confinement mode plasmas

Abstract

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