Reverse field injection for the gradientBdrift transport of a highhyphen;current electron beam

摘要

Reverse field injection was used to inject a 0.9hyphen;MeV electron beam produced in a ring diode into a drift tube. The annular beam then was transported distances of up to 183 cm by gradientBdrift in an applied magnetic field. The electron beam struck a tantalum target at the end of the drift tube, producing bremsstrahlung xhyphen;rays. An electron beam current of 1.1 MA was inferred from measurements of xhyphen;ray production in the target. This implies an injection efficiency of 69percnt;.