Physical Review Letters · 2000 · 153 citations · 19 references
Natural SciencesPhysicsNuclear PhysicsPlasma PhysicsTransport PhenomenaCollisions In PlasmasMagnetized PlasmaPlasma ConfinementPlasma HeatingPlasma TransportBeam TransportCompressionDensityElectron-positron CollisionsMagnetized Plasma KineticsPenning TrapsPlasma Transport PhenomenaPlasma Transport Processes
A rotating electric field applied to a magnetized positron plasma in a Penning‑Malmberg trap drives inward transport, while collisions with a neutral buffer gas mitigate heating. The technique compresses the plasma over a wide frequency range, achieving central density increases up to a factor of 20 and enabling brighter positron beams, studies of electron‑positron plasmas, and antihydrogen production.
Inward transport of a magnetized pure positron plasma confined in a Penning-Malmberg trap is produced by applying a rotating electric field to the plasma. Compression is observed over a broad range of frequencies. Compression factors up to 20 in central density were obtained. Positron collisions with a neutral buffer gas are used to counteract the heating due to the rotating electric field. The results have implications for a variety of applications including the production of brightness enhanced positron beams, the study of electron-positron plasmas, and antihydrogen production.
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Positron Plasma in the Laboratory
C. M. Surko, M. Leventhal, A. Passner · Physical Review Letters · 1989 · 342 citations
An Electron-Positron Beam-Plasma Experiment
R. G. Greaves, C. M. Surko · Physical Review Letters · 1995 · 264 citations
Steady-State Confinement of Non-neutral Plasmas by Rotating Electric Fields
Xinyi Huang, F. Anderegg, E. M. Hollmann et al. · Physical Review Letters · 1997 · 204 citations