Design of S-band re-entrant cavity BPM

SYNCHROTRON TECHNOLOGY AND APPLICATIONS

Design of S-band re-entrant cavity BPM

LUO Qing，

SUN Baogen，

HE Duohui

Nuclear Science and Techniques

Vol.20, No.3

pp.133-139

Published in print 20 Jun 2009

DOI：10.13538/j.1001-8042/nst.20.133-139

32503

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.

Cavity BPMRe-entrantCut-through waveguideMAFIAOmega3pAD8302

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