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Studies of the non-axisymmetric plasma boundary displacement in JET in presence of externally applied magnetic field
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
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2015 (English)In: Plasma Physics and Controlled Fusion, ISSN 0741-3335, E-ISSN 1361-6587, Vol. 57, no 10, 104003Article in journal (Refereed) Published
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Abstract [en]

Non-axisymmetric plasma boundary displacement is caused by the application of the external magnetic field with low toroidal mode number. Such displacement affects edge stability, power load on the first wall and could affect efficiency of the ICRH coupling in ITER. Studies of the displacement are presented for JET tokamak focusing on the interaction between error field correction coils (EFCCs) and shape control system. First results are shown on the direct measurement of the plasma boundary displacement at different toroidal locations. Both qualitative and quantitative studies of the plasma boundary displacement caused by interaction between EFCCs and shape control system are performed for different toroidal phases of the external field. Axisymmetric plasma boundary displacement caused by the EFCC/shape control system interaction is seen for certain phase values of the external field. The value of axisymmetric plasma boundary displacement caused by interaction can be comparable to the non-axisymmetric plasma boundary displacement value produced by EFCCs.

Place, publisher, year, edition, pages
EUROfus Consortium, JET, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England. [Yadykin, D.] Uppsala Univ, Dept Phys & Astron, S-75120 Uppsala, Sweden. [Yadykin, D.] Chalmers, Dept Earth & Space Sci, S-41296 Gothenburg, Sweden. [Frassinetti, L.] Royal Inst Technol KTH, Dept Fus Plasma Phys, SE-10044 Stockholm, Sweden. [Delabie, E.] FOM DIFFER, Nieuwegein, Netherlands. [Chapman, I. T.; Gerasimov, S.; Kempenaars, M.; Rimini, F. G.] CCFE, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England., 2015. Vol. 57, no 10, 104003
Keyword [en]
non-axisymmetric plasma boundary displacement, externally applied magnetic field, interaction with plasma control system
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:uu:diva-274361DOI: 10.1088/0741-3335/57/10/104003ISI: 000366679100004OAI: oai:DiVA.org:uu-274361DiVA: diva2:896328
Available from: 2016-01-21 Created: 2016-01-21 Last updated: 2017-11-30Bibliographically approved

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