Collective Thomson scattering in magnetized electron and positron pair plasma and the application to induced Compton scattering

Understand

We consider collective Thomson scattering of an incident X-mode wave (with the electric vector perpendicular to the background magnetic field) in magnetized electron and positron pair plasma.

• The collective effects do not exactly cancel out in contrast to the non-magnetized case.
• Still, the cross-section is comparable to the non-collective one, with the same suppression by the square of the cyclotron frequency in a strong magnetic field.
• The comparable cross-section holds even though the net current is nearly zero from the drift motion of electrons and positrons.