In the trial 1 of measuring the proton electric moment, storage rings with electrostatic lattice have been considered. Here an overview is given about the main parameters regarding such a kind of focusing. Beyond confirming all the issues regarding this subject, a non-null element M31 is introduced in all the 3x3 matrices which deal with the vector(x, x',Δp/p) and its role is discussed.
Conte M. (Thu,) studied this question.