Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2009, Vol. 20 ›› Issue (3): 133-139 doi: 10.13538/j.1001-8042/nst.20.133-139


Design of S-band re-entrant cavity BPM

LUO Qing SUN Baogen* HE Duohui   

  1. National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230029, China
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LUO Qing, SUN Baogen, HE Duohui. Design of S-band re-entrant cavity BPM.Nuclear Science and Techniques, 2009, 20(3): 133-139     doi: 10.13538/j.1001-8042/nst.20.133-139


An S-band cavity BPM is designed for a new injector for HLS (Hefei Light Source). It consists of two cavities that work on 2448 MHz: a re-entrant position cavity tuned to TM110 mode and a reference cavity tuned to TM010 mode. Cut-through waveguides are used as pickups to suppress the monopole signal. Simulations with different assumption of dimension change are performed to evaluate errors caused by mechanical error and give general tolerance. Design of electronics is given. Theoretical resolution of this design is 31 nm.

Key words: Cavity BPM, Re-entrant, Cut-through waveguide, MAFIA, Omega3p, AD8302