A micro-undulator fabricated by LIGA processes

An undulator of period 1 mm has been designed as part of a series of studies toward table-top synchrotron radiation sources. The undulator consists of a silver conductor embedded in poles and substrate of nickel-iron. Computations predict a field pattern of appropriate strength and quality if the current can be prevented from shunting from the silver across the nickel-iron poles, either through insulation or through slotted poles. A ten-scale model has been fabricated and measured; a full-scale model has also been constructed by conventional machining techniques, but has not yet been measured.