A polygon laser scanning micrometer for magnet size measurement studies

Abstract

In this paper, we describe the design and development of a polygon laser scanner for undulator magnet size measurement studies. In the laser scan micrometer, a laser light source is focused on to the facets of a rotating polygon mirror that reflects the laser beam. The parallel light emerging from the polygon surface falls on the object through a F-theta lens. The object obstructs the light. A lens at the opposite side of the object collects and focuses the light onto a detector. The shadow caused by the obstruction results in an output voltage for a period of time that is proportional to the size of the object. The method is used for undulator magnet size measurements for free electron laser applications.

Applications of Terrestrial Laser Scanner in Detecting Pavement Surface Defects

“…Further streamlining data collection is the fast matching of point clouds from sweep control and ground control using geographic coordination points. With precise measuring and annotation capabilities such as split screen, filtered views, and linear spacing, it also offers a fantastic browsing experience [35,36]. The collected data resulting from TLS observations were processed using the MAGNET COLLAGE program to measure the surface defects with high accuracy, as demonstrated in Figure 2.…”

Progress in Development and Measurement of an Asymmetric Magnet Pole Undulator

“…Bell make Hall probes and Tesla meters. The pulsed wire magnetic bench has been set up as an alternate method for field integral measurements [6]. It has the advantages of measuring the field integrals directly.…”

“…The LIDA Laboratory has developed a stretched wire system to measure the field integrals and the field harmonics as well. In the method the field integral and second field integral are measured from the induced voltage at appropriate wire translation inside the undulator [6]. The undulator will be measured by Hall probe and wire method to compare the results.…”