Upgraded control system designed for SECRAL

To improve the accuracy and usability of the super- conducting electron cyclotron resonance ion source with advanced design in Lanzhou （SECRAL）, an upgraded version of the control system was designed and tested. This paper details the architecture of the optimized control system and presents the results of its use in the long-term operation of the accelerator. The control system software, based on Visual C＋＋, was developed following the model-view-controller architecture design pattern. The data acquisition system was based on a field-programmable gate array integrated circuit. In addition, control strategies were optimized for higher operational stability. The upgraded control system was tested with a U33＋ ion beam at SECRAL, where it provided a data acquisition time of less than 1 ms. The fast reaction time and high- precision data processing during beam tuning verified the stability and maintainability of the control system.