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Title: Cavity BPM with Dipole-Mode-Selective Coupler

In this paper, we present a novel position sensitive signal pickup scheme for a cavity BPM. The scheme utilizes the H-plane of the waveguide to couple magnetically to the side of the cavity, which results in a selective coupling to the dipole mode and a total rejection of the monopole mode. This scheme greatly simplifies the BPM geometry and relaxes machining tolerances. We will present detailed numerical studies on such a cavity BPM, analyze its resolution limit and tolerance requirements for a nanometer resolution. Finally present the measurement results of a X-band prototype.
Authors:
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Publication Date:
OSTI Identifier:
884883
Report Number(s):
SLAC-PUB-11913
TRN: US0603850
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: Presented at Particle Accelerator Conference (PAC 03), Portland, Oregon, 12-16 May 2003
Research Org:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; DIPOLES; GEOMETRY; MACHINING; MONOPOLES; RESOLUTION; TOLERANCE; WAVEGUIDES Accelerators,ACCPHY, ACCSYS