Calculated longitudinal (a) and transverse (b) impedances with different frequency. (IMAGE)

Nuclear Science and Techniques

Calculated longitudinal (a) and transverse (b) impedances with different frequency.

Caption

To mitigate beam instabilities caused by higher-order modes (HOMs) in high-current storage rings, this design employs an elliptical choke as a natural filter. While the accelerating TM020-mode is efficiently trapped, parasitic modes are coupled out through damping slots and attenuated by ferrite loads. This mechanism significantly reduces longitudinal and transverse HOM impedances, ensuring the beam stability essential for the STCF.

Credit

Ye-Long Wei

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License

CC BY-NC

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