Thermal analysis and water-cooling design of the CSNS MEBT 324MHz buncher cavity

LIU Hua-Chang; OUYANG Hua-Fu

doi:10.1088/1674-1137/32/4/008

Chinese Physics C> 2008, Vol. 32> Issue(4) : 280-284 DOI: 10.1088/1674-1137/32/4/008

Thermal analysis and water-cooling design of the CSNS MEBT 324MHz buncher cavity

LIU Hua-Chang ^, ,
OUYANG Hua-Fu

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Abstract：
At least two bunchers are needed in the 3MeV H^－ Medium Energy Beam Transport (MEBT) line located between RFQ and DTL for the CSNS (China Spallation Neutron Source). A nose-cone geometry has been adopted as the type of buncher cavity for its simplicity, higher impedance and lower risk of multipacting. By making use of the results got from the simulations on the buncher with two-dimension code SUPERFISH, the thermal and structural analyses have been carried out, the process and results to determine the resulting frequency shift due to thermal and structural distortion of the cavity are presented, the water-cooling channel position and the optimum cooling water temperature as well as the tuning method by adjusting the cooling water temperature when the cavity is out of resonance are also determined through the analyses.

References

[1]

. Plostinar C, Clarke-Gayther M. Rebuncher-Bunching RF Cavities and Hybrid Quadrupoles for the RAL Front-Endtest Stand (FETS), Conf-06-003-HIPPI2. William S Janna. Engineering Heat Transfer, SI Edition,Chapter 113. Hartman N, Rimmer R A. Electromagnetic, Thermal, and Structural Analysis of RF Cavities Using ANSYS. Proceeding of 2001 Particle Accelerator Conference. Chicago

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LIU Hua-Chang and OUYANG Hua-Fu. Thermal analysis and water-cooling design of the CSNS MEBT 324MHz buncher cavity[J]. Chinese Physics C, 2008, 32(4): 280-284. doi: 10.1088/1674-1137/32/4/008

LIU Hua-Chang and OUYANG Hua-Fu. Thermal analysis and water-cooling design of the CSNS MEBT 324MHz buncher cavity[J]. Chinese Physics C, 2008, 32(4): 280-284. doi: 10.1088/1674-1137/32/4/008 shu

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Received: 2007-06-04
Revised: 2007-06-13

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沈阳化工大学材料科学与工程学院沈阳 110142

Thermal analysis and water-cooling design of the CSNS MEBT 324MHz buncher cavity

LIU Hua-Chang ^,
OUYANG Hua-Fu

Corresponding author: LIU Hua-Chang,

Received Date: 2007-06-04
Accepted Date: 2007-06-13
Available Online: 2008-04-05

Abstract:

At least two bunchers are needed in the 3MeV H^－ Medium Energy Beam Transport (MEBT) line located between RFQ and DTL for the CSNS (China Spallation Neutron Source). A nose-cone geometry has been adopted as the type of buncher cavity for its simplicity, higher impedance and lower risk of multipacting. By making use of the results got from the simulations on the buncher with two-dimension code SUPERFISH, the thermal and structural analyses have been carried out, the process and results to determine the resulting frequency shift due to thermal and structural distortion of the cavity are presented, the water-cooling channel position and the optimum cooling water temperature as well as the tuning method by adjusting the cooling water temperature when the cavity is out of resonance are also determined through the analyses.