Multi-physics analysis of the RFQ for Injector Scheme Ⅱ of C-ADS driver linac

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WANG Jing, HUANG Jian-Long, HE Yuan, ZHANG Xiao-Qi, ZHANG Zhou-Li and SHI Ai-Min. Multi-physics analysis of the RFQ for Injector Scheme Ⅱ of C-ADS driver linac[J]. Chinese Physics C, 2014, 38(10): 107005. doi: 10.1088/1674-1137/38/10/107005
WANG Jing, HUANG Jian-Long, HE Yuan, ZHANG Xiao-Qi, ZHANG Zhou-Li and SHI Ai-Min. Multi-physics analysis of the RFQ for Injector Scheme Ⅱ of C-ADS driver linac[J]. Chinese Physics C, 2014, 38(10): 107005.  doi: 10.1088/1674-1137/38/10/107005 shu
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Received: 2013-11-29
Revised: 1900-01-01
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Multi-physics analysis of the RFQ for Injector Scheme Ⅱ of C-ADS driver linac

    Corresponding author: WANG Jing,

Abstract: A 162.5 MHz, 2.1 MeV radio frequency quadruples (RFQ) structure is being designed for the Injector Scheme Ⅱ of the China Accelerator Driven Sub-critical System (C-ADS) linac. The RFQ will operate in continuous wave (CW) mode as required. For the CW normal conducting machine, the heat management will be one of the most important issues, since the temperature fluctuation may cause cavity deformation and lead to the resonant frequency shift. Therefore a detailed multi-physics analysis is necessary to ensure that the cavity can stably work at the required power level. The multi-physics analysis process includes RF electromagnetic analysis, thermal analysis, mechanical analysis, and this process will be iterated for several cycles until a satisfactory solution can be found. As one of the widely accepted measures, the cooling water system is used for frequency fine tunning, so the tunning capability of the cooling water system is also studied under different conditions. The results indicate that with the cooling water system, both the temperature rise and the frequency shift can be controlled at an acceptable level.

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