An Electrostatic Hexapole

A pure electrostatic hexapole is defined by the command: 5 E(LECTROSTATIC) H(EXAPOLE) <effective length $\ell$ of hexapole in meter> <V_H in kV at electrode> <aperture radius G₀ in meter> ; [example: E   H   0.2   0.3   0.03 ;]