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SSC-LINAC是为兰州重离子研究装置(HIRFL)设计的直线注入器,它将U34+离子加速到1 Me V/u注入到分离扇回旋加速器(SSC)中,为冷却储存环(CSR)提供10 Me V/u的U34+。该注入器可以将SSC引出的重离子流强提高一个量级以上。SSC-LINAC由一个RFQ(Radio Frequency Quadrupole)加速器和4个DTL(drift tube linac)组成,设计频率为53.667 MHz。RFQ工作在连续波模式,设计功率30 k W,如果不能有效地冷却,高频电流在电极表面产生的热量会使RFQ的腔壁和电极发生形变,从而导致腔体频率的漂移以及加速和聚焦电场的改变。因此,为了保证连续波工作的RFQ加速器稳定运行,对水冷模式和通道设计提出了很高的要求。作者用有限元软件ANSYS对RFQ进行高频电磁场、温度场、结构应力的耦合分析,验证了冷却方案设计的可行性和可靠性。
The SSC-LINAC is a linear injector designed for the Lanzhou Heavy Ion Research Unit (HIRFL) that injects U34 + ions up to 1 Me V / u into a separate fan cyclotron (SSC), providing 10 for a cool storage ring (CSR) Me V / u U34 +. The injector increases the heavy ion flow from the SSC by more than an order of magnitude. The SSC-LINAC consists of a RFQ (Radio Frequency Quadrupole) accelerator and four DTLs (drift tube linac) with a design frequency of 53.667 MHz. The RFQ operates in continuous wave mode and has a design power of 30 kW. If not cooled efficiently, the heat generated at the electrode surface by high-frequency current can deform the cavity walls and electrodes of the RFQ, causing the cavity frequency to drift and accelerate and focus Electric field changes. Therefore, in order to ensure the stable operation of the continuous wave RFQ accelerator, the water cooling mode and the channel design put forward high requirements. The author uses the finite element software ANSYS to analyze the coupling of RFQ with high frequency electromagnetic field, temperature field and structural stress, and verifies the feasibility and reliability of the cooling scheme design.