the end it should also be understood that the sequence of the steps of producing the multipole device of the present inventions as described is one preferred sequence but that different orders of processing can be used while still taking advantage of one or more of the benefits of the present inventions after fixing the blank of material a first central bore 304 fig3 is created 306 and which is defined by a substantially cylindrical wall 308 extending coaxially with a central axis 310 the central axis 310 is intended to refer to the central axis relative to the final electrodes and will be coaxial with the z axis 42 under some circumstances the central axis 310 may not always be selected to be equidistant from the outer surfaces of the cylinder but the electrode surfaces are preferably formed based on the location of the central axis 310 the diameter of the bore 304 is preferably such as to leave sufficient material for later more precise machining to allow formation of the electrode surfaces as desired subsequent steps are then used to remove material and or define the various elements of the multipole device the electrodes will be separated from each other and one polarity block will be electrically isolated from all other polarity blocks the polarity blocks will also be fixed relative to each other preferably prior to the final formation of the electrode surfaces in one preferred embodiment the outer portions of the electrodes are separated 312 from each other in the embodiment shown in fig3 a first pair of electrodes 314 and 316 have outer portions 318 and 320 respectively and a second pair of electrodes 322 and 324 include outer portions 326 and 328 respectively the first pair.