Filtern
Volltext vorhanden
- nein (10)
Dokumenttyp
- Wissenschaftlicher Artikel (9)
- Sonstiges (1)
Sprache
- Englisch (10)
Gehört zur Bibliographie
- ja (10)
Schlagworte
- instabilities (6)
- waves (5)
- solar wind (4)
- magnetic fields (3)
- turbulence (3)
- Laboratory astrophysics (2)
- gamma rays: general (2)
- relativistic processes (2)
- Beam dynamics (1)
- Beam-plasma instability (1)
Institut
The general electromagnetic fluctuation theory is a powerful tool to analyze the magnetic fluctuation spectrum of a plasma. Recent works utilizing this theory for a magnetized non-relativistic isotropic Maxwellian electron-proton plasma have demonstrated that the equilibrium ratio of vertical bar delta B vertical bar/B-0 can be as high as 10(-12). This value results from the balance between spontaneous emission of fluctuations and their damping, and it is considerably smaller than the observed value vertical bar delta B vertical bar/B-0 in the solar wind at 1 au, where 10(-3) less than or similar to vertical bar delta B vertical bar/B-0 less than or similar to 10(-1). In the present manuscript, we consider an anisotropic bi-Maxwellian distribution function to investigate the effect of plasma instabilities on the magnetic field fluctuations. We demonstrate that these instabilities strongly amplify the magnetic field fluctuations and provide a sufficient mechanism to explain the observed value of vertical bar delta B vertical bar/B-0 in the solar wind at 1 au.