Pulse requirements for field integral measurements in pulsed wire method

摘要

The pulse requirements in pulsed wire measurements are verified for undulators with and without end field corrections. For a perfect undulator, the second field integral is uniform along the length of the undulator and the required pulse size is calculated by the distance of the sensor divided by the wave velocity. The undulator without end field correction or with improper end field configuration requires longer pulse sizes than the shimmed undulator for both first and second field integral results.