{"journal": {"journal_issue": {"journal_volume": {"volume": "Volume 1"}, "publication_date": {"day": "14", "year": "2026", "month": "01", "@media_type": "online"}}, "journal_article": {"titles": {"title": "An adaptive quasi-neutrality solver for full-F flux-driven gyrokinetic simulations of tokamak plasmas in presence of poloidal asymmetries"}, "program": [{"@name": "fundref", "assertion": {"@name": "fundgroup", "assertion": [{"@name": "funder_name", "value": "European Commission"}, {"@name": "award_number", "value": "101052200"}, {"@name": "project_title", "value": "Implementation of activities described in the Roadmap to Fusion during Horizon Europe through a joint programme of the members of the EUROfusion consortium"}]}}, {"@name": "AccessIndicators", "license_ref": [{"value": "https://creativecommons.org/licenses/by/4.0", "@applies_to": "am", "@start_date": "2026-01-14"}, {"value": "https://creativecommons.org/licenses/by/4.0", "@applies_to": "vor", "@start_date": "2026-01-14"}, {"value": "https://creativecommons.org/licenses/by/4.0", "@applies_to": "tdm", "@start_date": "2026-01-14"}], "free_to_read": {"value": "", "@start_date": "2026-01-14"}}, {"related_item": [{"intra_work_relation": {"value": "https://hal.science/hal-05111064v3", "@identifier-type": "uri", "@relationship-type": "isSameAs"}}, {"intra_work_relation": {"value": "https://hal.science/hal-05111064v2", "@identifier-type": "uri", "@relationship-type": "hasPreprint"}}, {"intra_work_relation": {"value": "https://hal.science/hal-05111064v1", "@identifier-type": "uri", "@relationship-type": "hasPreprint"}}]}], "abstract": {"value": {"value": "Gyrokinetic codes are used to simulate transport in tokamak plasmas. In these codes, the distribution functions evolve self consistently with an electromagnetic field. To compute the temporal evolution of the electrostatic potential, a quasi-neutrality equation is solved. In some gyrokinetic codes, the quasi-neutrality solver assumes that the background densities and temperatures are constant in time and on flux surfaces. This assumption, which implicitly uses the so-called δF approach, can break up, in particular at the edge of the plasma which can display large and time evolving poloidal asymmetries.In this paper, a numerical solver of the quasi-neutrality equation accounting for time evolving poloidal asymmetries is presented. This solver is compatible with all electron models (adiabatic, kinetic or hybrid) and written for the long wavelength or the Padé approximations for the polarisation term. The impact of such an improvement is carefully reported on different types of simulations, illustrating when the δF approach forquasi-neutrality is valid and when it fails. A procedure to limit the numerical cost of updating the background profiles in the quasi-neutrality solver is also presented.", "@xml:lang": "en"}}, "doi_data": {"doi": "10.46298/ops.15867", "resource": "http://ops.episciences.org/15867", "collection": [{"item": {"@crawler": "iParadigms", "resource": "https://hal.science/hal-05111064v3/document"}, "@property": "crawler-based"}, {"item": {"resource": {"value": "https://hal.science/hal-05111064v3/document", "@mime_type": "application/pdf"}}, "@property": "text-mining"}]}, "keywords": {"0": "[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph]", "1": "[PHYS.PHYS.PHYS-COMP-PH]Physics [physics]/Physics [physics]/Computational Physics [physics.comp-ph]", "en": ["Tokamak", "Gyrokinetic", "Quasi-neutrality"]}, "@language": "en", "contributors": {"person_name": [{"ORCID": "https://orcid.org/0000-0002-6669-416X", "surname": "Donnel", "@sequence": "first", "given_name": "Peter", "affiliations": {"institution": {"institution_id": {"@type": "ror", "value": "https://ror.org/03hffat62"}, "institution_name": "Institut de Recherche sur la Fusion par confinement Magnétique", "institution_acronym": "IRFM"}}, "@contributor_role": "author"}, {"surname": "Obrejan", "@sequence": "additional", "given_name": "Kevin", "affiliations": {"institution": {"institution_id": {"@type": "ror", "value": "https://ror.org/03hffat62"}, "institution_name": "Institut de Recherche sur la Fusion par confinement Magnétique", "institution_acronym": "IRFM"}}, "@contributor_role": "author"}, {"ORCID": "https://orcid.org/0000-0003-2479-563X", "surname": "Sarazin", "@sequence": "additional", "given_name": "Yanick", "affiliations": {"institution": {"institution_id": {"@type": "ror", "value": "https://ror.org/03hffat62"}, "institution_name": "Institut de Recherche sur la Fusion par confinement Magnétique", "institution_acronym": "IRFM"}}, "@contributor_role": "author"}, {"surname": "Bigué", "@sequence": "additional", "given_name": "Roméo", "affiliations": {"institution": [{"institution_id": {"@type": "ror", "value": "https://ror.org/03hffat62"}, "institution_name": "Institut de Recherche sur la Fusion par confinement Magnétique", "institution_acronym": "IRFM"}, {"institution_name": "Physique des interactions ioniques et moléculaires"}]}, "@contributor_role": "author"}, {"ORCID": "https://orcid.org/0000-0002-3469-2338", "surname": "Bourne", "@sequence": "additional", "given_name": "Emily", "affiliations": {"institution": {"institution_id": {"@type": "ror", "value": "https://ror.org/02s376052"}, "institution_name": "Ecole Polytechnique Fédérale de Lausanne", "institution_acronym": "EPFL"}}, "@contributor_role": "author"}, {"ORCID": "https://orcid.org/0000-0002-3208-3651", "surname": "Brochard", "@sequence": "additional", "given_name": "Guillaume", "affiliations": {"institution": {"institution_id": {"@type": "ror", "value": "https://ror.org/03hffat62"}, "institution_name": "Institut de Recherche sur la Fusion par confinement Magnétique", "institution_acronym": "IRFM"}}, "@contributor_role": "author"}, {"surname": "de Gianni", "@sequence": "additional", "given_name": "Ludovica", "affiliations": {"institution": {"institution_id": {"@type": "ror", "value": "https://ror.org/03hffat62"}, "institution_name": "Institut de Recherche sur la Fusion par confinement Magnétique", "institution_acronym": "IRFM"}}, "@contributor_role": "author"}, {"ORCID": "https://orcid.org/0000-0003-4869-7049", "surname": "Dif-Pradalier", "@sequence": "additional", "given_name": "Guilhem", "affiliations": {"institution": {"institution_id": {"@type": "ror", "value": "https://ror.org/03hffat62"}, "institution_name": "Institut de Recherche sur la Fusion par confinement Magnétique", "institution_acronym": "IRFM"}}, "@contributor_role": "author"}, {"ORCID": "https://orcid.org/0000-0001-5730-1259", "surname": "Garbet", "@sequence": "additional", "given_name": "Xavier", "affiliations": {"institution": [{"institution_id": {"@type": "ror", "value": "https://ror.org/03hffat62"}, "institution_name": "Institut de Recherche sur la Fusion par confinement Magnétique", "institution_acronym": "IRFM"}, {"institution_id": {"@type": "ror", "value": "https://ror.org/02e7b5302"}, "institution_name": "Nanyang Technological University [Singapour]", "institution_acronym": "NTU"}]}, "@contributor_role": "author"}, {"ORCID": "https://orcid.org/0000-0001-7821-9107", "surname": "Grandgirard", "@sequence": "additional", "given_name": "Virginie", "affiliations": {"institution": {"institution_id": {"@type": "ror", "value": "https://ror.org/03hffat62"}, "institution_name": "Institut de Recherche sur la Fusion par confinement Magnétique", "institution_acronym": "IRFM"}}, "@contributor_role": "author"}, {"surname": "Krah", "@sequence": "additional", "given_name": "Philipp", "affiliations": {"institution": {"institution_id": {"@type": "ror", "value": "https://ror.org/03hffat62"}, "institution_name": "Institut de Recherche sur la Fusion par confinement Magnétique", "institution_acronym": "IRFM"}}, "@contributor_role": "author"}, {"surname": "Munschy", "@sequence": "additional", "given_name": "Yann", "affiliations": {"institution": {"institution_id": {"@type": "ror", "value": "https://ror.org/03hffat62"}, "institution_name": "Institut de Recherche sur la Fusion par confinement Magnétique", "institution_acronym": "IRFM"}}, "@contributor_role": "author"}, {"ORCID": "https://orcid.org/0009-0003-5852-7446", "surname": "Matthieu", "@sequence": "additional", "given_name": "Protais", "affiliations": {"institution": {"institution_id": {"@type": "ror", "value": "https://ror.org/03hffat62"}, "institution_name": "Institut de Recherche sur la Fusion par confinement Magnétique", "institution_acronym": "IRFM"}}, "@contributor_role": "author"}]}, "publisher_item": {"item_number": {"value": "15867", "@item_number_type": "article_number"}}, "acceptance_date": {"day": "03", "year": "2025", "month": "12", 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