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The taper-shaped superconducting quarter wave resonators with frequency of 80.5 MHz,β of 0.041and 0.085 have been pre-researched.The radio frequency(RF) design of the cavities has been completed,and the structural design is also an important aspect which will be discussed in the following.The frequency shift caused by the etching efects of the surface treatment,the helium bath pressure and the Lorentz force,and the mechanical modes caused by the microphonic excitation have been analyzed.The results show that the frequency variation from the Lorentz force is not serious and stifening rings are explored aimed at decreasing the deformation brought by the helium pressure and microphonic excitation.
The taper-shaped superconducting quarter wave resonators with frequency of 80.5 MHz, β of 0.041 and 0.085 have been pre-researched. The radio frequency (RF) design of the cavities has been completed, and the structural design is also an important aspect which will be discussed in the following The frequency shift caused by the etching efects of the surface treatment, the helium bath pressure and the Lorentz force, and the mechanical modes caused by the microphonic excitation have been analyzed. results show that the frequency variation from the Lorentz force is not serious and stifening rings are explored aimed at decreasing the shaping brought by the helium pressure and microphonic excitation.