17–22 May 2026
C.I.D
Europe/Zurich timezone

Design and Theoretical Analysis of a Highly Compact Triple-folded 20 MHz Quarter-Wave Cavity for SSMB

TUP7621
19 May 2026, 16:00
2h
C.I.D

C.I.D

Deauville, France
Poster Presentation MC7.T06: Normal Conducting RF Poster session

Speaker

Peizhi Fang (Tsinghua University)

Description

To meet the energy compensation requirements of Steady-State Micro-Bunching (SSMB), a 20 MHz RF cavity with extreme axial compactness is essential. This paper presents an innovative triple-folded quarter-wave cavity design that overcomes the size limitations of conventional structures. Based on cascaded transmission line theory, we established an analytical model to optimize the cavity’s shunt impedance and tuning range. A triple-folded 20 MHz prototype was designed and validated via CST simulations, showing that the axial length is compressed to 1.25 m (approximately 1/3 the length of a standard QWC) while achieving a high shunt impedance of 558 kΩ with excellent thermal stability. This compact design offers a high-efficiency solution for low-frequency RF systems.

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Author

Peizhi Fang (Tsinghua University)

Co-authors

shuxin zheng (Tsinghua University) Lianmin Zheng (Tsinghua University) Ying-Chao Du (Tsinghua University) Xiujie Deng (Tsinghua University) Dr Zhilong Pan (Tsinghua University) Chuanxiang Tang (Tsinghua University) Dr hongjuan yao (Tsinghua University)

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