Blar i Bergen Open Research Archive på forfatter "Vaivads, Andris"

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    • Electron Acceleration and Thermalization at Magnetotail Separatrices 

      Norgren, Astrid Elisabet Cecilia; Hesse, Michael; Graham, Daniel B.; Khotyaintsev, Yuri V.; Tenfjord, Paul; Vaivads, Andris; Steinvall, Konrad; Xu, Yin; Gershman, Daniel J; Lindqvist, Per-Arne; Plaschke, Ferdinand; Burch, James L (Journal article; Peer reviewed, 2020)
      In this study we use the Magnetospheric Multiscale mission to investigate the electron acceleration and thermalization occurring along the magnetic reconnection separatrices in the magnetotail. We find that initially cold ...

    • Electron Bernstein waves driven by electron crescents near the electron diffusion region 

      Li, Wenya; Graham, D. B.; Khotyaintsev, Yuri V.; Vaivads, Andris; André, Mats; Min, K.; Liu, K.; Tang, B.B.; Wang, C.; Fujimoto, K.; Norgren, Astrid Elisabet Cecilia; Toledo-Redondo, Sergio; Lindqvist, Per-Arne; Ergun, R.E.; Torbert, Roy B.; Rager, A.C.; Dorelli, J.C.; Gershman, D.J.; Giles, B. L.; Lavraud, B.; Plaschke, F.; Magnes, W.; Le Contel, Olivier; Russell, Christopher T.; Burch, J. L. (Journal article; Peer reviewed, 2020)
      The Magnetospheric Multiscale (MMS) spacecraft encounter an electron diffusion region (EDR) of asymmetric magnetic reconnection at Earth’s magnetopause. The EDR is characterized by agyrotropic electron velocity distributions ...

    • Electron Heating by Debye-Scale Turbulence in Guide-Field Reconnection 

      Khotyaintsev, Yuri V.; Graham, Daniel B.; Steinvall, Konrad; Alm, Love; Vaivads, Andris; Johlander, Andreas; Norgren, Astrid Elisabet Cecilia; Li, Wenya; Divin, Andrey; Fu, Huishan; Hwang, Kyoung-Joo; Burch, James L; Ahmadi, Narges; Le Contel, Olivier; Gershman, Daniel J; Russell, Christopher T.; Torbert, R. B. (Journal article; Peer reviewed, 2020)
      We report electrostatic Debye-scale turbulence developing within the diffusion region of asymmetric magnetopause reconnection with a moderate guide field using observations by the Magnetospheric Multiscale mission. We show ...

    • Millisecond observations of nonlinear wave–electron interaction in electron phase space holes 

      Norgren, Astrid Elisabet Cecilia; Graham, Daniel B.; Argall, Matthew; Steinvall, Konrad; Hesse, Michael; Khotyaintsev, Yuri V.; Vaivads, Andris; Tenfjord, Paul Arne Riksheim; Gershman, Daniel J; Lindqvist, Per-Arne; Burch, James L; Plaschke, Ferdinand (Journal article; Peer reviewed, 2022)
      Electron phase space holes (EHs) associated with electron trapping are commonly observed as bipolar electric field signatures in both space and laboratory plasma. Until recently, it has not been possible to resolve EHs in ...

    • MMS Observations of Multiscale Hall Physics in the Magnetotail 

      Alm, Love; André, Mats; Graham, Daniel B.; Khotyaintsev, Yuri V.; Vaivads, Andris; Chappell, Charles Richard; Dargent, Jérémy; Fuselier, Stephen A.; Haaland, Stein; Lavraud, Benoit; Li, Wenya; Tenfjord, Paul; Toledo-Redondo, Sergio; Vines, Sarah K. (Journal article; Peer reviewed, 2019)
      We present Magnetospheric Multiscale mission (MMS) observations of Hall physics in the magnetotail, which compared to dayside Hall physics is a relatively unexplored topic. The plasma consists of electrons, moderately cold ...

    • Particle Energization in Space Plasmas: Towards a Multi-Point, Multi-Scale Plasma Observatory 

      Retinò, Alessandro; Khotyaintsev, Y; Le Contel, O; Marcucci, Maria Federica; Plaschke, Ferdinand; Vaivads, Andris; Angelopoulos, Vassilis; Blasi, Pasquale; Burch, Jim; De Keyser, Johan; Dunlop, Malcolm; Dai, Lei; Eastwood, Jonathan; Fu, Huishan; Håland, Stein Egil; Hoshino, Masahiro; Johlander, Andreas; Kepko, Larry; Kucharek, Harald; Lapenta, Gianni; Lavraud, Benoit; Malandraki, Olga; Matthaeus, William; McWilliams, Kathryn; Petrukovich, Anatoli; Pinçon, Jean-Louis; Saito, Yoshifumi; Sorriso-Valvo, Luca; Vainio, Rami; Wimmer-Schweingruber, Robert (Journal article; Peer reviewed, 2021)
      This White Paper outlines the importance of addressing the fundamental science theme “How are charged particles energized in space plasmas” through a future ESA mission. The White Paper presents five compelling science ...

    • Universality of Lower Hybrid Waves at Earth's Magnetopause 

      Graham, D. B.; Khotyaintsev, Yu V; Norgren, Astrid Elisabet Cecilia; Vaivads, Andris; Andre, M.; Drake, J. F.; Egedal, J.; Zhou, M.; Le Contel, O; Webster, J.M.; Lavraud, B.; Kacem, Imed; Génot, V.; Jacquey, C.; Rager, AC; Gershman, Daniel J; Burch, J. L.; Ergun, Robert E (Journal article; Peer reviewed, 2019)
      Waves around the lower hybrid frequency are frequently observed at Earth's magnetopause and readily reach very large amplitudes. Determining the properties of lower hybrid waves is crucial because they are thought to ...