Recommended Citation
Postprint version. Published in IEEE Particle Accelerator Conference Proceedings: Albuquerque, NM, June 25, 2007.
NOTE: At the time of publication, the author Themis Masorides was not yet affiliated with Cal Poly.
The definitive version is available at https://doi.org/10.1109/PAC.2007.4441280.
Abstract
Several high-current accelerators use feedback techniques in the accelerating RF systems to control the impedances seen by the circulating beam. [1, 2] These Direct and Comb Loop architectures put the high power klystron and LLRF signal processing components inside feedback loops, and the ultimate behavior of the systems depends on the individual sub-component properties. Imperfections and non-idealities in the signal processing leads to reduced effectiveness in the impedance controlled loops. In the PEP-II LLRF systems non-linear effects have been shown to reduce the achievable beam currents, increase low-mode longitudinal growth rates and reduce the margins and stability of the LLRF control loops. We present measurements of the driver amplifiers used in the PEP-II systems, and present measurement techniques needed to quantify the small-signal gain, linearity, transient response and image frequency generation of these amplifiers.
Disciplines
Physics
Copyright
2007 IEEE.
Publisher statement
Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
URL: https://digitalcommons.calpoly.edu/phy_fac/434