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MOBA04 |
Design and Beam Commissioning of the HEPS Linac | |
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| The High Energy Photon Source (HEPS) is the first fourth-generation synchrotron radiation source based on a 6-GeV diffraction-limited storage ring that is currently under construction in China. Its accelerator complex is composed of a 6-GeV storage ring, a full energy booster, a 500-MeV Linac, and three transfer lines. The Linac is an S-band normal conducting electron linear accelerator with available bunch charge up to approximately 7 nC. This is the highest bunch charge among linear (pre-)injectors of the third and fourth generation light sources worldwide. Recently we completed the commissioning of the Linac. In this talk, we will introduce the design and technical highlights of the HEPS Linac, and present the latest results of beam commissioning. | ||
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WEXA01 |
A new framework for high level application development at HEPS | |
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| As a fourth-generation light source, HEPS employs a compact multi-bend achromat dispersion structure and uses a large number of combination magnets, which brings new challenges to beam parameter control. In order to meet the beam commissioning requirements of HEPS, a new high level application (HLA) development framework was designed and named Pyapas. The new framework adopts a model-based control strategy, a double-layer physical model module is designed for online calculation, which can address complex physical parameter tuning issues. To facilitate physicists in beam commissioning and research, the new framework is designed based on physical quantities,, which can be more intuitive in the commissioning process for measuring parameter analysis. And Pyapas also uses modular design to reduce development time. In March, 2023, HEPS began beam commissioning work of Linac. With the help of the HLAs based on physical quantities, we quickly found the appropriate working mode and achieved full-line beam pass-through. The report will detail the design concept and features of Pyapas. | ||
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