NDLI: An Over-damped Cavity Longitudinal Kicker for the PEP-II

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An Over-damped Cavity Longitudinal Kicker for the PEP-II

Content Provider	CiteSeerX
Author	Mcintosh, P. Akre, R. Anderson, D. Debarger, S. Dormiani, M. Fox, J. Schwarz, H.
Description	Both rings of PEP-II use drift tube kickers in the longitudinal bunch-by-bunch feedback system. Efforts are now underway to increase the stored beam currents and luminosity of PEP-II, and beam-induced heating of these structures, particularly in the Low Energy Ring (LER) is of concern. An alternative kicker design based on the over-damped cavity kicker, first developed by INFN-Frascati is being built for PEP-II. This low loaded Q (or wide bandwidth) structure is fed by a network of ridged waveguides coupled to a simple pill-box cavity. Beam induced RF power is also coupled out of the cavity to external loads, so that the higher order modes (HOMs) excited in the structure are well-damped. This paper details the kicker design for PEP-II and discusses some of the design trade-offs between shunt impedance and bandwidth, as well as the influence of the feedthroughs on the kicker parameters. Estimates of the expected power deposition in the cavity are also provided. very broadband with a low loaded Q, which is contrary to traditional RF cavity design requirements. A simple pillbox cavity is employed, strongly coupled to which are four large waveguides (see Figure 1) which are terminated externally to 50 Ω, reducing the Q to give a QL ~ 5.
File Format	PDF
Language	English
Publisher Institution	LER”, Proceedings of PAC03
Access Restriction	Open
Subject Keyword	External Load Expected Power Deposition Shunt Impedance Over-damped Cavity Kicker Rf Power Paper Detail Beam-induced Heating Traditional Rf Cavity Design Requirement Alternative Kicker Design Wide Bandwidth Stored Beam Current Over-damped Cavity Longitudinal Kicker Simple Pill-box Cavity Simple Pillbox Cavity Large Waveguide Order Mode Kicker Parameter Kicker Design Low Energy Ring Low Loaded Pep-ii Use Drift Tube Kicker Design Trade-off Longitudinal Bunch-by-bunch Feedback System
Content Type	Text
Resource Type	Article

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