The Two-Cylinder Electron Lens Two semi-infinite, hollow cylinders of radius R are coaxial with the z-axis. Apart from an insulating ring of thickness d 0, the two cylinders abut one another at z = held at potentials Vz and VR. Find the potential everywhere inside both cylinders. You will need the integrals O and are ds s Jo(As) = J1(2.) and 2 ds s Jo(xps) Jo(xm s) = J}(xn)8nm- The real numbers xm satisfy Jo(xm) = 0. %3D d V2 VR