Design Of A Generic Fixturing Device For Accurate Micro-alignment Of Electrodes In Multi-stage Depressed Collector

摘要

The problems and probable solution for micro-alignment of electrodes in multi-stage depressed collector (MDC) of space borne traveling wave tube (TWT) have been discussed in the present study. It deals with the development of a generic technology for axial alignment of the annular hollow conical shaped four electrode sub-assemblies in MDC within ±10 μm to enhance its efficiency. Since the electrodes are hollow, it is difficult to find out their axes in the air. So, a high precision assembly fixture set-up has been designed to fix the electrode sub-assemblies one by one at different stages using He-Ne laser based modified Twymann-Green interferometry principle.