Ion pump control system designed for HIRFL
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ORIGINAL PAPER
Ion pump control system designed for HIRFL Tian Ruixia1 · Zhou Detai1 · Su Jianjun1 · Zhang Jianchuan1,2 · Wang Yanyu1,2 Received: 17 August 2020 / Revised: 23 October 2020 / Accepted: 31 October 2020 © Institute of High Energy Physics, Chinese Academy of Sciences 2020
Abstract Background Ion pump control system of HIRFL is designed based on the real-time distributed control software, EPICS. The hardware architecture, communication principle, database design and interlock design are introduced and elaborated in the paper. Methods PLC has been adopted to realize functions such as control monitoring and data communication. Interlock protect ion has been designed for ion pump control system to prevent damaging from high voltage. Results The test results show that the system has fast response function and high-speed data processing during the beam running and tuning. The response time of the system could reach 100 ms, the rate of data acquisition reaches to 10 time/s and the interlock protection time less than 40 ms. Conclusion The reliable and stable long-term operation of the vacuum system indicates that the performance has been constantly improved with the continuous optimization of the ion pump control system. Keywords HIRFL · EPICS · Ion pump controller · PLC
Introduction Heavy Ion Research Facility of Lanzhou (HIRFL) is an accelerator complex with general-purpose, whose research field includes high energy density physics, atomic physics, superheavy elements synthesis, radioactive ion beam physics, heavy ion physics and cancer therapy [1]. As an important part of the accelerator, the ion pump control system is built to provide ultra-high vacuum conditions for stable particle beam operation. The control system must manage multiple devices, which are distributed around the accelerator beam line, precisely and efficiently to meet various physical requirements. In order to realize the remote control and data acquisition of the ion pump controller, an ion pump control system is designed based on EPICS (Experimental Physics and Industrial Control System). In the paper, the progress of the control system framework is discussed to upgrade the
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Wang Yanyu [email protected] Tian Ruixia [email protected]
1
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
data acquisition and control characteristics for ion pump controller. The database based on MySQL [2, 3] is developed to store the voltage and current values of the ion pump power supply. Details of the system structure, interlocking protection, main test results and resulting analysis are described in the following sections.
Hardware system design High vacuum is one of the necessary conditions for the stable operation of accelerator. As one of the main pumps of the vacuum system, the ion pump has been used sputter burial to extract the remaining gas to make the pressure of the vacuum pipeline up to 10−9 Pa. Ion pump control system consists of P
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