publication application or patent was specifically and individually indicated to be incorporated in its entirety by reference all the disclosed embodiments of the invention described herein can be realized and practiced without undue experimentation although the best mode of carrying out the invention contemplated by the inventors is disclosed above practice of the present invention is not limited thereto accordingly it will be appreciated by those skilled in the art that the invention may be practiced otherwise than as specifically described herein for example the individual components need not be formed in the disclosed shapes or assembled in the disclosed configuration but could be provided in virtually any shape and assembled in virtually any configuration further the individual components need not be fabricated from the disclosed materials but could be fabricated from virtually any suitable materials further although the split tip electrode described herein is a physically separate module it will be manifest that the split tip electrode may be integrated into the apparatus with which it is associated furthermore all the disclosed elements and features of each disclosed embodiment can be combined with or substituted for the disclosed elements and features of every other disclosed embodiment except where such elements or features are mutually exclusive it will be manifest that various additions modifications and rearrangements of the features of the present invention may be made without deviating from the spirit and scope of the underlying inventive concept it is intended that the scope of the invention as defined by the appended claims and their equivalents cover all such additions modifications and rearrangements the appended claims are not.