An automatic phase-matching technique of CYCIAE-100 cyclotron
The RF system of CYCIAE- 100 cyclotron has two cavities, which are driven separately by two identical 100-kW RF amplifiers. Due to the power on sequence issue of the three DDSs in the LLRF systems, each time when the system is individually switched on, the phase relationship may not sat- isfy the re...
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| Veröffentlicht in: | Nuclear science and techniques 2017-09, Vol.28 (9), p.25-30, Article 126 |
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| creator | Fu, Xiao-Liang Yin, Zhi-Guo Ji, Bin Zhao, Zhen-Lu Wei, Jun-Yi Zhang, Tian-Jue |
| description | The RF system of CYCIAE- 100 cyclotron has two cavities, which are driven separately by two identical 100-kW RF amplifiers. Due to the power on sequence issue of the three DDSs in the LLRF systems, each time when the system is individually switched on, the phase relationship may not sat- isfy the requirements of beam acceleration. Instead of adding an extra reset logic to the system, a search and validation algorithm based on the decision tree has been carried out to make sure the phase of the two cavities is correct right after applying power to the cavities, taking advantage of existing hardware resources. In the first year of operation, there are more than 20 times of scheduled shutdown of the cyclotron system. For each time when the cyclotron RF system is completely shutdown and powered on again, the operator confirmed that the phase matching of the two cavities can be done automatically within 30 s. The related work, including the optimization of the phase detector and the development and validation of the algorithm, is reported in this paper. |
| doi_str_mv | 10.1007/s41365-017-0277-9 |
| format | Article |
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Due to the power on sequence issue of the three DDSs in the LLRF systems, each time when the system is individually switched on, the phase relationship may not sat- isfy the requirements of beam acceleration. Instead of adding an extra reset logic to the system, a search and validation algorithm based on the decision tree has been carried out to make sure the phase of the two cavities is correct right after applying power to the cavities, taking advantage of existing hardware resources. In the first year of operation, there are more than 20 times of scheduled shutdown of the cyclotron system. For each time when the cyclotron RF system is completely shutdown and powered on again, the operator confirmed that the phase matching of the two cavities can be done automatically within 30 s. The related work, including the optimization of the phase detector and the development and validation of the algorithm, is reported in this paper.</description><identifier>ISSN: 1001-8042</identifier><identifier>EISSN: 2210-3147</identifier><identifier>DOI: 10.1007/s41365-017-0277-9</identifier><language>eng</language><publisher>Singapore: Springer Singapore</publisher><subject>DDSS ; Energy ; Hadrons ; Heavy Ions ; Nuclear Energy ; Nuclear Physics ; 匹配技术 ; 回旋加速器 ; 射频放大器 ; 射频系统 ; 相位关系 ; 相位检测器 ; 验证算法</subject><ispartof>Nuclear science and techniques, 2017-09, Vol.28 (9), p.25-30, Article 126</ispartof><rights>Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Chinese Nuclear Society, Science Press China and Springer Nature Singapore Pte Ltd. 2017</rights><rights>Copyright © Wanfang Data Co. Ltd. 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| source | Springer Nature - Complete Springer Journals; Alma/SFX Local Collection |
| subjects | DDSS Energy Hadrons Heavy Ions Nuclear Energy Nuclear Physics 匹配技术 回旋加速器 射频放大器 射频系统 相位关系 相位检测器 验证算法 |
| title | An automatic phase-matching technique of CYCIAE-100 cyclotron |
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