2019 Volume 14 Pages 1201039
Methods for controlling accurately the diameter de of a pure electron plasma in a nested trap of the BX-U machine are described. By controlling the acceleration voltages and the number of electron guns activated, we can successfully change de over the range between 0.28 and 2.27 cm. Therefore, de can be made almost exactly the same as the diameter of a lithium ion plasma enabling the investigation of a two-fluid plasma state by using non-neutral plasmas.