Multidimensional electron beam-plasma instabilities in the relativistic regime [Elektronisk resurs]
-
Bret, Antoine (författare)
-
Gremillet, Laurent (författare)
-
Dieckmann, Mark Eric (författare)
-
- Linköpings universitet Institutionen för teknik och naturvetenskap (utgivare)
-
-
Alternativt namn: ITN
-
Alternativt namn: Linköping University. Department of Science and Technology
-
- Linköpings universitet Tekniska högskolan (utgivare)
-
-
Alternativt namn: Linköpings universitet. Tekniska fakulteten
-
Alternativt namn: Linköpings tekniska högskola
-
Alternativt namn: Tekniska högskolan vid Linköpings universtiet
-
Alternativt namn: LiTH
-
Alternativt namn: Linköping University. Institute of Technology
-
Se även: Universitet i Linköping Tekniska högskolan
- 2010
- Engelska.
-
Ingår i: Physics of Plasmas. - 1070-664X. ; 17:12, 120501-1-120501-36
-
Läs hela texten
-
Läs hela texten
-
Läs hela texten
-
Läs hela texten
Sammanfattning
Ämnesord
Stäng
- The interest in relativistic beam-plasma instabilities has been greatly rejuvenated over the past two decades by novel concepts in laboratory and space plasmas. Recent advances in this long-standing field are here reviewed from both theoretical and numerical points of view. The primary focus is on the two-dimensional spectrum of unstable electromagnetic waves growing within relativistic, unmagnetized, and uniform electron beam-plasma systems. Although the goal is to provide a unified picture of all instability classes at play, emphasis is put on the potentially dominant waves propagating obliquely to the beam direction, which have received little attention over the years. First, the basic derivation of the general dielectric function of a kinetic relativistic plasma is recalled. Next, an overview of two-dimensional unstable spectra associated with various beam-plasma distribution functions is given. Both cold-fluid and kinetic linear theory results are reported, the latter being based on waterbag and Maxwell–Jüttner model distributions. The main properties of the competing modes (developing parallel, transverse, and oblique to the beam) are given, and their respective region of dominance in the system parameter space is explained. Later sections address particle-in-cell numerical simulations and the nonlinear evolution of multidimensional beam-plasma systems. The elementary structures generated by the various instability classes are first discussed in the case of reduced-geometry systems. Validation of linear theory is then illustrated in detail for large-scale systems, as is the multistaged character of the nonlinear phase. Finally, a collection of closely related beam-plasma problems involving additional physical effects is presented, and worthwhile directions of future research are outlined.
Ämnesord
- Natural Sciences (hsv)
- Physical Sciences (hsv)
- Fusion, Plasma and Space Physics (hsv)
- Naturvetenskap (hsv)
- Fysik (hsv)
- Fusion, plasma och rymdfysik (hsv)
- NATURAL SCIENCES (svep)
- Physics (svep)
- Geocosmophysics and plasma physics (svep)
- Plasma physics (svep)
- NATURVETENSKAP (svep)
- Fysik (svep)
- Geokosmofysik och plasmafysik (svep)
- Plasmafysik (svep)
Indexterm och SAB-rubrik
- instability
- relativistic beam
Inställningar
Hjälp
Beståndsinformation saknas