title: Impact of energetic-particle-driven geodesic acoustic modes on turbulence.
abstract: The impact on turbulent transport of geodesic acoustic modes excited by energetic particles is evidenced for the first time in flux-driven 5D gyrokinetic simulations using the Gysela code. Energetic geodesic acoustic modes (EGAMs) are excited in a regime with a transport barrier in the outer radial region. The interaction between EGAMs and turbulence is such that turbulent transport can be enhanced in the presence of EGAMs, with the subsequent destruction of the transport barrier. This scenario could be particularly critical in those plasmas, such as burning plasmas, exhibiting a rich population of suprathermal particles capable of exciting energetic modes.
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: D
authors.initials: D
authors.lastname: Zarzoso
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Sarazin
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: X
authors.initials: X
authors.lastname: Garbet
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: R
authors.initials: R
authors.lastname: Dumont
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France and Laboratoire AIM Paris-Saclay, CEA/Irfu Université Paris-Diderot CNRS/INSU, 91191 Gif-sur-Yvette, France.
authors.forename: A
authors.initials: A
authors.lastname: Strugarek
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: J
authors.initials: J
authors.lastname: Abiteboul
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: T
authors.initials: T
authors.lastname: Cartier-Michaud
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: G
authors.initials: G
authors.lastname: Dif-Pradalier
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: Ph
authors.initials: P
authors.lastname: Ghendrih
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: V
authors.initials: V
authors.lastname: Grandgirard
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: G
authors.initials: G
authors.lastname: Latu
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: C
authors.initials: C
authors.lastname: Passeron
authors.affiliation: CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
authors.forename: O
authors.initials: O
authors.lastname: Thomine