Experimental control system of the X‐ray magnetic circular dichroism endstation at Hefei Light Source‐II.

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Bibliographic Details
Title: Experimental control system of the X‐ray magnetic circular dichroism endstation at Hefei Light Source‐II.
Authors: Kong, Anbo1 (AUTHOR), Chen, Liuguo1 (AUTHOR) chenliuguo@ustc.edu.cn, Chen, Kai1 (AUTHOR), Zhang, DaDi1 (AUTHOR), Sun, Xiaokang1 (AUTHOR), Liu, Gongfa1 (AUTHOR)
Source: Journal of Synchrotron Radiation. Mar2026, Vol. 33 Issue 2, p351-361. 11p.
Subjects: Scanning systems, Software frameworks, Magnetic circular dichroism, Noise control, Acquisition of data, Data acquisition systems, Synchrotron radiation
Abstract: The Hefei Light Source‐II (HLS‐II) facility is undergoing upgrades to its beamline and endstation to enhance its synchrotron radiation capabilities. For the X‐ray Magnetic Circular Dichroism endstation, an experimental control system leveraging Bluesky and Experimental Physics and Industrial Control System has been developed. This control system implements three distinct scan modes: step scan, fly scan and soft fly scan. The system architecture employs Queue Server for automated experiment orchestration and Ophyd based device abstraction, enabling seamless adaptation across multiple HLS‐II beamlines. During software development, three key system features are included: (1) a simulation debugging environment combining a virtual server platform, virtual devices and virtual input/output controllers for closed‐loop testing; (2) unified control interfaces through component abstraction; and (3) real‐time data acquisition with noise‐reduction methods. The implemented soft fly scan mode demonstrates particular advantages in experiments, achieving a tenfold reduction in measurement duration while maintaining signal‐to‐noise ratio levels comparable to conventional step scan, significantly enhancing both experimental efficiency and data quality for the user. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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