High gain proportional rf control stability at TESLA cavities

High gain proportional rf control stability at TESLA cavities

Fast proportional rf control is used as the basis for rf field regulation in actual linear accelerator projects like the international linear collider (ILC) and the European x-ray free electron laser (XFEL) based on TESLA technology. Additional control loops improve the field regulation by treating...

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Main Author: Elmar Vogel
Format: Article
Language:English
Published: American Physical Society 2007-05-01
Series:Physical Review Special Topics. Accelerators and Beams
Online Access:http://doi.org/10.1103/PhysRevSTAB.10.052001
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spelling doaj-926aaf08c5bd480d8990db51e9ff1d602020-11-24T21:26:05ZengAmerican Physical SocietyPhysical Review Special Topics. Accelerators and Beams1098-44022007-05-0110505200110.1103/PhysRevSTAB.10.052001High gain proportional rf control stability at TESLA cavitiesElmar VogelFast proportional rf control is used as the basis for rf field regulation in actual linear accelerator projects like the international linear collider (ILC) and the European x-ray free electron laser (XFEL) based on TESLA technology. Additional control loops improve the field regulation by treating repetitive effects and compensating the beam loading. Nevertheless, the ability for high gain operation of the fast loops is desirable for the strong suppression of nonpredictive and nonrepetitive disturbances. TESLA cavities host nine fundamental modes (FMs) where only one is used for beam acceleration. The unwanted FMs have a significant influence on the proportional rf control loop stability at high gains. Within this paper, the stability of proportional rf control loops taking the FMs and digitalization effects into account will be discussed in detail together with measures enabling a significant increase of the gain values.http://doi.org/10.1103/PhysRevSTAB.10.052001
collection DOAJ
language English
format Article
sources DOAJ
author Elmar Vogel
spellingShingle Elmar Vogel
High gain proportional rf control stability at TESLA cavities
Physical Review Special Topics. Accelerators and Beams
author_facet Elmar Vogel
author_sort Elmar Vogel
title High gain proportional rf control stability at TESLA cavities
title_short High gain proportional rf control stability at TESLA cavities
title_full High gain proportional rf control stability at TESLA cavities
title_fullStr High gain proportional rf control stability at TESLA cavities
title_full_unstemmed High gain proportional rf control stability at TESLA cavities
title_sort high gain proportional rf control stability at tesla cavities
publisher American Physical Society
series Physical Review Special Topics. Accelerators and Beams
issn 1098-4402
publishDate 2007-05-01
description Fast proportional rf control is used as the basis for rf field regulation in actual linear accelerator projects like the international linear collider (ILC) and the European x-ray free electron laser (XFEL) based on TESLA technology. Additional control loops improve the field regulation by treating repetitive effects and compensating the beam loading. Nevertheless, the ability for high gain operation of the fast loops is desirable for the strong suppression of nonpredictive and nonrepetitive disturbances. TESLA cavities host nine fundamental modes (FMs) where only one is used for beam acceleration. The unwanted FMs have a significant influence on the proportional rf control loop stability at high gains. Within this paper, the stability of proportional rf control loops taking the FMs and digitalization effects into account will be discussed in detail together with measures enabling a significant increase of the gain values.
url http://doi.org/10.1103/PhysRevSTAB.10.052001
work_keys_str_mv AT elmarvogel highgainproportionalrfcontrolstabilityatteslacavities
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