Experimental Observation of a Current-Driven Instability in a Neutral Electron-Positron Beam
Experimental Observation of a Current-Driven Instability in a Neutral Electron-Positron Beam
We report on the first experimental observation of a current-driven instability developing in a quasineutral matter-antimatter beam. Strong magnetic fields (≥1 T) are measured, via means of a proton radiography technique, after the propagation of a neutral electron-positron beam through a background electron-ion plasma. The experimentally determined equipartition parameter of …