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Reverse field injection was used to inject a 0.9‐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 gradient B drift in an applied magnetic field. The electron beam struck a tantalum target at the end of the drift tube, producing bremsstrahlung x‐rays. An electron beam current of 1.1 MA was inferred from measurements of x‐ray production in the target. This implies an injection efficiency of 69%.