Preliminary Monte Carlo simulation of beryllium migration during JET ITER-like wall divertor operation

M. I. Airila, A. Järvinen, M. Groth, P. Belo, S. Wiesen, S. Brezinsek, K. Lawson, D. Borodin, A. Kirschner, J. P. Coad, K. Heinola, J. Likonen, M. Rubel, A. Widdowson

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    Abstract

    Abstract Migration of beryllium into the divertor and deposition on tungsten in the final phase of the first ITER-like-wall campaign of JET are modelled with the 3D Monte Carlo impurity transport code ERO. The simulation covers the inner wall and the inner divertor. To generate the plasma background for Monte Carlo tracing of impurity particles, we use the EDGE2D/EIRENE code set. At the relevant regions of the wall, the estimated plasma conditions vary around Te≈5eV and ne≈2×1017m-3 (far-scrape-off layer; more than 10 cm away from the LCFS). We calculate impurity distributions in the plasma using the main chamber source as a free parameter in modelling and attempt to reproduce inter-ELM spectroscopic Be II line (527 nm) profiles at the divertor. The present model reproduces the level of emission close to the inner wall, but further work is needed to match also the measured emission peak values and ultimately link the modelled poloidal net deposition profiles of beryllium to post mortem data.

    Original languageEnglish
    Article number48423
    Pages (from-to)800-804
    Number of pages5
    JournalJournal of Nuclear Materials
    Volume463
    DOIs
    Publication statusPublished - 22 Jul 2015
    MoE publication typeA1 Journal article-refereed

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    Airila, M. I., Järvinen, A., Groth, M., Belo, P., Wiesen, S., Brezinsek, S., Lawson, K., Borodin, D., Kirschner, A., Coad, J. P., Heinola, K., Likonen, J., Rubel, M., & Widdowson, A. (2015). Preliminary Monte Carlo simulation of beryllium migration during JET ITER-like wall divertor operation. Journal of Nuclear Materials, 463, 800-804. [48423]. https://doi.org/10.1016/j.jnucmat.2014.09.010