Multi-physics Field Coupling Analysis of RFQ Cavity for SSC-LINAC

WANG Jing; HUANG Jianlong; ZHANG Xiaoqi; HE Yuan; YANG Yaqing; LU Yuanrong; ZHU Kun

doi:10.11804/NuclPhysRev.33.04.437

Heavy Ion Research Facility at Lanzhou(HIRFL) consists of SFC, SSC, CSRm and CSRe. A new linac injector, which will increase U³⁴⁺ to 1 MeV/u, is designed for SSC to increase the beam intensity to ten times higher. The new injector, whose frequency is 53.667 MHz, is composed by a RFQ (Radio Frequency Quadrupole) cavity and four DTL(Drift Tube Linac) cavities. The RFQ cavity, whose RF power is 30 kW, is operated at CW(continuous wave) mode. The heat produced by HF (high frequency) electromagnetic will cause deformation of RFQ structure, lead to the resonant frequency shift, and reduce the focusing efficiency of the cavity. An efficient cooling system is necessary to ensure that the RFQ cavity can stably be operated at the nominal frequency. A detailed multi-physics field coupling analysis of RFQ has been finished with 3D finite elements software ANSYS. The result of the analysis shows that the water cooling system can cool the RFQ cavity fully and keep the frequency drift be in a acceptable level.

Multi-physics Field Coupling Analysis of RFQ Cavity for SSC-LINAC

1. Lanzhou University of Technology, Lanzhou 730000, China;

2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;

3. Institute of Heavy Ion Physics, Peking University, Beijing 100871, China

Funds: National Natural Science Foundation of China(11079001, 91026001)

Received Date: 2016-02-28

Rev Recd Date: 2016-03-18

Publish Date: 2016-12-20

Key words:

Abstract: Heavy Ion Research Facility at Lanzhou(HIRFL) consists of SFC, SSC, CSRm and CSRe. A new linac injector, which will increase U³⁴⁺ to 1 MeV/u, is designed for SSC to increase the beam intensity to ten times higher. The new injector, whose frequency is 53.667 MHz, is composed by a RFQ (Radio Frequency Quadrupole) cavity and four DTL(Drift Tube Linac) cavities. The RFQ cavity, whose RF power is 30 kW, is operated at CW(continuous wave) mode. The heat produced by HF (high frequency) electromagnetic will cause deformation of RFQ structure, lead to the resonant frequency shift, and reduce the focusing efficiency of the cavity. An efficient cooling system is necessary to ensure that the RFQ cavity can stably be operated at the nominal frequency. A detailed multi-physics field coupling analysis of RFQ has been finished with 3D finite elements software ANSYS. The result of the analysis shows that the water cooling system can cool the RFQ cavity fully and keep the frequency drift be in a acceptable level.

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Reference (10)

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Multi-physics Field Coupling Analysis of RFQ Cavity for SSC-LINAC

doi: 10.11804/NuclPhysRev.33.04.437

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