Simulation study of surfing acceleration in magnetized space plasmas
2005 (English)In: New Journal of Physics, ISSN 1367-2630, Vol. 7Article in journal (Refereed) Published
We present a numerical study of the surfing mechanism in which electrons are trapped in Bernstein-Greene-Kruskal (BGK) modes, and are accelerated across the magnetic field direction by the Lorentz force in magnetized space plasmas. The BGK modes are the product of an ion-beam Buneman instability that excites large-amplitude electrostatic upper-hybrid waves in the plasma. Our study, which is performed with particle-in-cell (PIC) and Vlasov codes, reveals the stability of the BGK mode as a function of the magnetic field strength and the ion beam speed. It is found that the surfing acceleration is more effective for a weaker magnetic field owing to the longer lifetime of the BGK modes. The importance of our investigation to electron acceleration in astrophysical environments has been emphasized. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Place, publisher, year, edition, pages
2005. Vol. 7
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-28431DOI: 10.1088/1367-2630/7/1/136Local ID: 13570OAI: oai:DiVA.org:liu-28431DiVA: diva2:249239