Effect of e × B driven transport on the deposition of carbon in the outer divertor of ASDEX upgrade

L. Aho-Mantila; M. Wischmeier; K. Krieger; V. Rohde; H. W. Müller; D. P. Coster; M. Groth; A. Kirschner; R. Neu; S. Potzel; B. Sieglin; E. Wolfrum

doi:10.1016/j.jnucmat.2010.10.080

Effect of e × B driven transport on the deposition of carbon in the outer divertor of ASDEX upgrade

L. Aho-Mantila
, M. Wischmeier
, K. Krieger
, V. Rohde
, H. W. Müller
, D. P. Coster
, M. Groth
, A. Kirschner
, R. Neu
, S. Potzel
, B. Sieglin
, E. Wolfrum

VTT Technical Research Centre of Finland
Helsinki University of Technology
Max Planck Institute for Plasma Physics
Forschungszentrum Jülich (FZJ)

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

13 Scopus citations

Abstract

Reversal of the toroidal magnetic field and plasma current is observed to considerably change the re-deposition of ¹³C injected into the outer divertor scrape-off layer of ASDEX Upgrade. In forward field low-density L-mode plasmas, 24-32% of injected carbon is found locally re-deposited. The deposition tails are aligned toroidally both upstream and downstream of the exit holes and indicate transport towards the strike point. In reversed field with similar main plasma parameters, the re-deposition efficiency is a factor of 2 smaller. The deposition is more localized and shows transport towards the outer scrape-off layer. Numerical modelling with the SOLPS5.0 and ERO codes shows that these differences in ¹³C deposition can be attributed to the combination of the E × B drift reversal directly influencing the transport of carbon and changes in local plasma conditions due to the drift reversal.

Original language	English
Pages (from-to)	S231-S234
Journal	Journal of Nuclear Materials
Volume	415
Issue number	1 SUPPL
DOIs	https://doi.org/10.1016/j.jnucmat.2010.10.080
State	Published - 1 Aug 2011
Externally published	Yes

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10.1016/j.jnucmat.2010.10.080

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Aho-Mantila, L., Wischmeier, M., Krieger, K., Rohde, V., Müller, H. W., Coster, D. P., Groth, M., Kirschner, A., Neu, R., Potzel, S., Sieglin, B., & Wolfrum, E. (2011). Effect of e × B driven transport on the deposition of carbon in the outer divertor of ASDEX upgrade. Journal of Nuclear Materials, 415(1 SUPPL), S231-S234. https://doi.org/10.1016/j.jnucmat.2010.10.080

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title = "Effect of e × B driven transport on the deposition of carbon in the outer divertor of ASDEX upgrade",

abstract = "Reversal of the toroidal magnetic field and plasma current is observed to considerably change the re-deposition of 13C injected into the outer divertor scrape-off layer of ASDEX Upgrade. In forward field low-density L-mode plasmas, 24-32\% of injected carbon is found locally re-deposited. The deposition tails are aligned toroidally both upstream and downstream of the exit holes and indicate transport towards the strike point. In reversed field with similar main plasma parameters, the re-deposition efficiency is a factor of 2 smaller. The deposition is more localized and shows transport towards the outer scrape-off layer. Numerical modelling with the SOLPS5.0 and ERO codes shows that these differences in 13C deposition can be attributed to the combination of the E × B drift reversal directly influencing the transport of carbon and changes in local plasma conditions due to the drift reversal.",

author = "L. Aho-Mantila and M. Wischmeier and K. Krieger and V. Rohde and M{\"u}ller, \{H. W.\} and Coster, \{D. P.\} and M. Groth and A. Kirschner and R. Neu and S. Potzel and B. Sieglin and E. Wolfrum",

note = "Funding Information: The authors would like to thank Mr. Gilbert de Saint-Aubin for his support in the NRA measurements of the 13 C re-deposition. This work, supported by the European Communities under the contract of Association between EURATOM/Tekes, was carried out within the framework of the Task Forces on Plasma Wall Interactions and Integrated Tokamak Modelling of the European Fusion Development Agreement. The views and opinions expressed herein do not necessarily reflect those of the European Commission. The work was partially funded by the Academy of Finland Project Nos. 121371 and 134930 . Part of the computations presented in this document have been made with CSC{\textquoteright}s computing environment. CSC is the Finnish IT centre for science and is owned by the Ministry of Education.",

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doi = "10.1016/j.jnucmat.2010.10.080",

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AU - Aho-Mantila, L.

AU - Wischmeier, M.

AU - Krieger, K.

AU - Rohde, V.

AU - Müller, H. W.

AU - Coster, D. P.

AU - Groth, M.

AU - Kirschner, A.

AU - Neu, R.

AU - Potzel, S.

AU - Sieglin, B.

AU - Wolfrum, E.

N1 - Funding Information: The authors would like to thank Mr. Gilbert de Saint-Aubin for his support in the NRA measurements of the 13 C re-deposition. This work, supported by the European Communities under the contract of Association between EURATOM/Tekes, was carried out within the framework of the Task Forces on Plasma Wall Interactions and Integrated Tokamak Modelling of the European Fusion Development Agreement. The views and opinions expressed herein do not necessarily reflect those of the European Commission. The work was partially funded by the Academy of Finland Project Nos. 121371 and 134930 . Part of the computations presented in this document have been made with CSC’s computing environment. CSC is the Finnish IT centre for science and is owned by the Ministry of Education.

PY - 2011/8/1

Y1 - 2011/8/1

N2 - Reversal of the toroidal magnetic field and plasma current is observed to considerably change the re-deposition of 13C injected into the outer divertor scrape-off layer of ASDEX Upgrade. In forward field low-density L-mode plasmas, 24-32% of injected carbon is found locally re-deposited. The deposition tails are aligned toroidally both upstream and downstream of the exit holes and indicate transport towards the strike point. In reversed field with similar main plasma parameters, the re-deposition efficiency is a factor of 2 smaller. The deposition is more localized and shows transport towards the outer scrape-off layer. Numerical modelling with the SOLPS5.0 and ERO codes shows that these differences in 13C deposition can be attributed to the combination of the E × B drift reversal directly influencing the transport of carbon and changes in local plasma conditions due to the drift reversal.

AB - Reversal of the toroidal magnetic field and plasma current is observed to considerably change the re-deposition of 13C injected into the outer divertor scrape-off layer of ASDEX Upgrade. In forward field low-density L-mode plasmas, 24-32% of injected carbon is found locally re-deposited. The deposition tails are aligned toroidally both upstream and downstream of the exit holes and indicate transport towards the strike point. In reversed field with similar main plasma parameters, the re-deposition efficiency is a factor of 2 smaller. The deposition is more localized and shows transport towards the outer scrape-off layer. Numerical modelling with the SOLPS5.0 and ERO codes shows that these differences in 13C deposition can be attributed to the combination of the E × B drift reversal directly influencing the transport of carbon and changes in local plasma conditions due to the drift reversal.

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JO - Journal of Nuclear Materials

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IS - 1 SUPPL

ER -

Effect of e × B driven transport on the deposition of carbon in the outer divertor of ASDEX upgrade

Abstract

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