The study of duoPIGatron ion source's arc characteristic based on the electrostatic probe's measurement

In this paper, measurement of step-by-step and sawtooth wave scan used to measure the plasma parameter with electrostatic probe in the ion source discharge is briefly introduced. Based on this, using the ion saturation currents which measured by electrostatic probe as the feedback variables, and using closed-loop control to modulate the plasma of 22 cm duoPIGatron ion source. Besides, make use of the result which measured by electrostatic probe to analysis the arc characteristic primarily. (authors)