Potential Due to a Circular Double Disk.

Abstract : A solution for the potential due to an inner circular disk at a constant potential surrounded by an annualar ring at another constant potential is given. The general solution is expressed both as an elliptic integral and as an expansion in Legendre polonomials. The case in which the two conductors are separated by a thin gap is also considered. An application of the solution to the collecting properties of a plasma probe is discussed. (Author)