Fixed‐bias floating double‐probe technique with simple Langmuir‐probe characteristics

摘要

A new floating double‐probe method is presented which has advantages over other floated‐probe systems heretofore described in the literature. The method utilizes two electrodes, one of constant area and the other with a variable area, and the two‐electrode configuration is separated by a fixed bias voltage. The current‐voltage characteristics of the new technique, which are generated by varying the area of one electrode, are identical to those of a simple Langmuir probe, thus coupling all the advantages of a floated‐probe system with the simple analysis scheme generally applied to the Langmuir probe for the determination of plasma density and temperature.