The experimental results of an apparatus designed to determine the specific electronic charge

摘要

NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document.An apparatus designed to measure the specific electronic charge for a free electron is described. A well collimated electron beam traverses axially a right circular cylindrical resonant cavity, which is operated so that the principal field interaction is due to a transverse, uniform, rotating magnetic field extending the length of the cavity. The cavity serves as a velocity selector so that the electron beam is undeflected, when it remains within the cavity an integral number of field cycles. The determination of [...] depends upon precise measurements of a length, a frequency, and a voltage. The holes, which provide the electron beam with access to the cavity, cause field distortion. The correction for this distortion is obtained empirically.The experimental results obtained with this apparatus are stated. The failure to secure a significant determination of [...] is considered. The feasibility of a precise determination of [...] by the described method with certain important design changes is asserted.