Combined remoderation-drift scheme for positron injection into a magnetic trap

The efficient transfer of a magnetically guided positron beam into region closed magnetic field lines is nontrivial. An $\mathbf{E}\ifmmode\times\else\texttimes\fi{}\mathbf{B}$-drift technique has previously been used effectively to inject low-energy (5- 20-eV) the confinement permanent-magnet-based dipole trap. To complement and extend that strategy, we have investigated an approach in which high-energy ($\ensuremath{\sim}350$-eV) remoderated SiC crystal immediately outside region; reemitted positrons are then drift injected. Thus combine remoderation injection same spatial region. Initial tests with this scheme were shown overall efficiency up $15(\ifmmode\pm\else\textpm\fi{}1)%$. Positron trajectory simulations enabled us account for various loss mechanisms thereby identify means improve future implementations. This method adds further flexibility search toroidal traps mission confining electron-positron pair plasmas.