Abstract
The coupled RFQ-SFRFQ (CRS) linac, which couples radio frequency quadrupole (RFQ) and separated function structure radio frequency quadrupole (SFRFQ) into a single cavity, is a novel compact accelerator developed in Peking university. In this paper, the detailed design of the remote control system for the CRS linac was presented. The hardware configuration of the system consists of an industry computer (IPC) and several different types of Programming Logic Controller (PLC) modules. The high voltage protection and cavity tuning control were discussed. The control software was developed with Windows Control Center (WinCC) and Step7 based on C script and Ladder Diagram (LAD) respectively. The interlock protection mechanism was introduced into the control system and the operating data can be flexibly acquired from the archives in structured query language (SQL) sever 2005. This system has been successfully implemented for the operation of an upgraded He <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">+</sup> ion injector. For the input beam optimization, a parameter scanner code was developed to optimize the beam transmission in low energy beam transport (LEBT) section, and the final optimized beam parameters were obtained.
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