Personal‐computer‐based control system for a 1.8 T hybrid wiggler

A control system has been developed for the 1.8 T wiggler to be delivered to the Synchrotron Radiation Research Center in Hsinchu, Taiwan. The system serves three major functions: gap monitoring and control, end‐corrector adjustment and tracking, and interlock safety and monitoring. The end correctors are programmed with a gap‐following feature for compensation of the electron trajectory in both transverse planes at all gaps. Software and hardware interlocks are provided for overtravel limits and protection against excessive variation in gap from end to end. The system is designed for stand‐alone operation as well as for compatibility with the SRRC central control system. Because the wiggler controller is based on a personal computer and uses the LabVIEW programming language, it is readily adaptable for other wiggler or undulator applications.