Design of an 81.25 MHz continuous-wave radio-frequency quadrupole accelerator for Low Energy Accelerator Facility
Design of an 81.25 MHz continuous-wave radio-frequency quadrupole accelerator for Low Energy Accelerator Facility
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DOI：
10.1016/j.nima.2016.11.056
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发表时间：
2017-03
影响因子：
1.4
通讯作者：
W. Ma;L. Lu;Xianbo Xu;Liepeng Sun;Zhouli Zhang;W. Dou;Chenxing Li;Longbo Shi;Yuan He;Hongwei Zhao
中科院分区：
文献类型：
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作者：
W. Ma;L. Lu;Xianbo Xu;Liepeng Sun;Zhouli Zhang;W. Dou;Chenxing Li;Longbo Shi;Yuan He;Hongwei Zhao
为中国科学院近代物理研究所低能加速器装置（LEAF）设计了一台81.25MHz连续波射频四极杆（CW）加速器。在CW工作模式下，建议的涡轮增压器设计采用传统的四叶片结构。主要设计目标是提供高分流阻抗和低功率损耗。在电磁场设计中，对π模稳定环进行了优化设计，以产生良好的模式分离。调谐器也被设计和优化，以调谐工作模式的频率和场平坦度。叶片底切经过优化，可沿着涡轮腔提供一个平场。此外，一个完整的长度模型与调制建立了最终的EM模拟。在电磁设计的基础上，对结构进行了热分析。在本文中，详细的EM设计和热模拟的LEAF-EQUIPMENT将介绍和讨论。对结构误差进行了分析。
An 81.25 MHz continuous wave (CW) radio frequency quadrupole (RFQ) accelerator has been designed for the Low Energy Accelerator Facility (LEAF) at the Institute of Modern Physics (IMP) of the Chinese Academy of Science (CAS). In the CW operating mode, the proposed RFQ design adopted the conventional four-vane structure. The main design goals are providing high shunt impendence with low power losses. In the electromagnetic (EM) design, the π-mode stabilizing loops (PISLs) were optimized to produce a good mode separation. The tuners were also designed and optimized to tune the frequency and field flatness of the operating mode. The vane undercuts were optimized to provide a flat field along the RFQ cavity. Additionally, a full length model with modulations was set up for the final EM simulations. Following the EM design, thermal analysis of the structure was carried out. In this paper, detailed EM design and thermal simulations of the LEAF-RFQ will be presented and discussed. Structure error analysis was also studied.