H ELECTRICITY
H01 ELECTRIC ELEMENTS
H01J ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J37/00 Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
H01J37/04 Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement or ion-optical arrangement
H01J37/147 Arrangements for directing or deflecting the discharge along a desired path