Interchange instability and transport in matter-antimatter plasmas

Abstract

Symmetric electron-positron plasmas in inhomogeneous magnetic fields are intrinsically subject to interchange instability and transport. Scaling relations for the propagation velocity of density blob perturbations relevant to transport in isothermal magnetically confined electron-positron plasmas are deduced, including damping effects when Debye lengths are large compared to Larmor radii. The relations are verified by nonlinear full-F gyrofluid computations. Results are in favour of sufficient magnetic confinement for planned electron-positron plasma experiments. The model is generalised to other matter-antimatter plasmas. Magnetised electron-positron-proton-antiproton plasmas are susceptible to interchange driven local matter-antimatter separation, which can be expected to impede (so far unrealised) sustained laboratory magnetic confinement.

References in corpus (5)

• Radial convection of finite ion temperature, high amplitude plasma blobs
• Inertial blob-hole symmetry breaking in magnetised plasma filaments
• Gyrokinetic stability theory of electron-positron plasmas
• Modelling of turbulent impurity transport in fusion edge plasmas using measured and calculated ionization cross sections
• Amplitude and size scaling for interchange motions of plasma filaments

Cited by in corpus (4)

• Reproducibility, accuracy and performance of the Feltor code and library on parallel computer architectures
• Beyond the Oberbeck-Boussinesq and long wavelength approximation
• Interchange transport in electron-positron plasmas with ion impurities
• Generalized slab universal instability and its appearance in pair plasma