| Paper |
Title |
Page |
| WEPTS103 |
Optimization of a Low-Alpha Lattice for the HLS-II Storage Ring |
3360 |
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- S.W. Wang, Y.G. Wang, W. Xu, K. Xuan
USTC/NSRL, Hefei, Anhui, People’s Republic of China
- J.Y. Li
IHEP, Beijing, People’s Republic of China
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To generate terahertz radiation at HLS-II, a low-alpha lattice scheme is proposed. The new lattice can reduce the bunch length in the storage ring, thus enhancing the coherent synchrotron radiation in the THz region. In this paper, the design and optimization of a low-alpha lattice is reported. The new lattice preserves the symmetry of nominal lattice and reduces the first and second order momentum factor at the cost of increasing maximum beta function and natural emittance. The bunch length is tracked and the result shows that the low-alpha lattice can effectively compress bunches in the storage ring. The performance of this low-alpha lattice can be further studied and improved.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-WEPTS103
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| About • |
paper received ※ 29 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019 |
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| THPRB038 |
ALARM SYSTEM OF IRFEL AT NSRL |
3896 |
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- X. Chen, C. Li, G. Liu, Z.X. Shao, Y. Song, J.G. Wang, K. Xuan
USTC/NSRL, Hefei, Anhui, People’s Republic of China
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An InfraRed Free Electron Laser Light (IRFEL) is under commissioning at National Synchrotron Radiation Laboratory (NSRL). The control system of IRFEL is a distributed system based on Experimental Physics and Industrial Control System (EPICS). The alarm system is an essential part of the control system. It is developed based on the software Phoebus. The module named "Alarms" in Phoebus can store states and configuration information of the Process Variable (PV) in the Kafka topics. To meet our requirements, 3 kinds of alarm message distribution applications are developed, i.e. Web-Based GUI, WeChat and SMS. This paper will introduce the alarm system architecture and the implementations of the applications for alarm message distribution.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-THPRB038
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| About • |
paper received ※ 17 April 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019 |
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| THPRB053 |
Upgrade of the Historical Data Query and Analysis System for HLS-II |
3928 |
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- Z.Y. Xie, C. Li, G. Liu, Z.X. Shao, Y. Song, J.G. Wang, K. Xuan
USTC/NSRL, Hefei, Anhui, People’s Republic of China
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The current historical data query and analysis system for the Hefei Light Source II (HLS-II) was developed with Apache Struts2. However, Apache Struts2 need to be fixed from time to time to avoid being attacked. Therefore, a new system based on Spring Boot and Vue.js is developed. Meanwhile, the performance of the system is optimized, and the radiation monitor module is added. This paper will detail the system architecture and software implementation.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2019-THPRB053
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|
| About • |
paper received ※ 24 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019 |
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