THE NONLAMINAR FLOW CHARACTERISTICS OF CS+ IN AN INTENSE CS+ GUN

The nonlaminar flow characteristics of Cs+ have been studied in an intense Cs+ gun. In the physical model established here, the effects of space charge and thermal initial velocity are taken into account, and a Maxwellian distribution of the thermal initial velocity and its cosine angular distribution of current density with respect to the normal line of the ion-emitting surface are assumed. Poisson's equations are solved in terms of iteration to find a self-consistent solution, and the nonlaminar trajectories are traced; hence the phase diagram at the exit of the gun is obtained. The calculated results are compared with experimental data, and they are in good agreement.