Design and fabrication of wire displacement sensors for undulator field measurement applications

In this paper, we describe the design and working principle of two wire displacement measuring sensors. The two sensors are used in a pulsed wire setup for undulator magnetic field measurements. First one is optocoupler sensor consists of a LED – phototransistor pair and the other one is a laser sensor of laser photodiode pair. Both the sensors work on the principle of light interruption and gives comparative results in our experimental setup.