Ming Liu, Zhenghui Mi, Weimin Pan, Rui Ge, Feisi He, Wenzhong Zhou, Miaofu Xu, Zihan Wang. Design of 648 MHz superconducting cavity tuner forChina Spallation Neutron Source phase II[J]. High Power Laser and Particle Beams, 2023, 35(12): 124007
- High Power Laser and Particle Beams
- Vol. 35, Issue 12, 124007 (2023)
Fig. 1. Variation of cavity input power demand with frequency detuning
Fig. 2. Plot of superconducting cavity Lorentz forcedetuning versus tuner stiffness
Fig. 3. Schematic of tuner design model
Fig. 4. Diagram of tuner 3D model
Fig. 5. Simulation analysis of tuner mechanical characteristics
Fig. 6. Diagram of mechanical tuning axial model
Fig. 7. Diagram of mechanical tuning axial simplifiedmodel
Fig. 8. Diagram of piezoelectric ceramic tuning axial model
Fig. 9. Diagram of simplified piezoelectric ceramic tuning axialsimplified model
Fig. 10. Variation of acceleration gradient with time during the pulse
Fig. 11. Dynamic Lorentz force detuning during the pulse
Fig. 12. Superconducting cavity response during pulses (0～4 ms)
Fig. 13. Photo of tuner mounted test on 650 MHz single cell cavity
Fig. 14. Plot of tuner stepper motor steps versus superconducting cavity frequency variation and tuner displacement variation
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Table 1. Superconducting cavity operating parameters
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Table 2. Tuner system requirement parameters
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Table 3. Mechanical properties of 648 MHz superconducting cavity
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Table 4. Force and displacement status of each component, when the mechanical tuner produces a displacement of
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Table 5. Force and displacement status of each component, when the piezoelectric ceramics produces a displacement of
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Table 6. Lorentz force detuning parameters before and after installing the tuner
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