ICAP2012 - List of Authors (Klingbeil, H.)

Paper

Title

Page

Dynamics of Ferrite Cavities and their Effect on Longitudinal Dipole Oscillations

124

C. Spies, M. Glesner
TUD, Darmstadt, Germany
U.K. Hartel, H. Klingbeil
TEMF, TU Darmstadt, Darmstadt, Germany
H.G. König
GSI, Darmstadt, Germany

Funding: This work is supported by the German Federal Ministry of Education and Research under grant number 06DA9028I.
In a synchrotron, particles are accelerated by repeatedly passing through RF cavities. In the SIS18 synchrotron at GSI, ferrite cavities are used. Each cavity is equipped with local control systems to adjust the amplitude and phase of the accelerating field. In this paper, we consider ferrite cavities of the type that is currently used in the SIS18 at GSI and will be used in the future SIS100 which is being built in the frame of the FAIR project. We analyze the dynamics of the cavities in conjunction with their local control loops. An emphasis is put on the cavities' reaction to changes in the desired amplitude or resonant frequency. Using simulations, we show that the cavities' dynamics hardly influence longitudinal dipole oscillations, and conclude that a high-level model for the RF cavities is sufficient.

Slides WEAAC3 [1.055 MB]

WEP13

Model-Based Analysis of Digital Signal Processing Blocks in a Beam Phase Control System

164

C. Spies, M. Glesner
TUD, Darmstadt, Germany
H. Klingbeil
TEMF, TU Darmstadt, Darmstadt, Germany

Funding: This work is supported by the German Federal Ministry of Education and Research under grant number 06DA9028I.
A beam phase control system comprises digital phase detectors and band pass filters to detect coherent longitudinal dipole and higher order bunch oscillations. These digital signal processing functions can be implemented in several ways, e. g. in software or on a programmable logic device. In this paper, we consider different possible implementations and compare them in terms of their real-time performance and their system resource consumption. For the phase detectors, a software implementation is compared against different (e. g. look-up table and CORDIC-based) hardware implementations. For the band pass filters, we consider software, hardware and mixed implementations.

Paper	Title	Page
WEAAC3	Dynamics of Ferrite Cavities and their Effect on Longitudinal Dipole Oscillations	124
	C. Spies, M. Glesner TUD, Darmstadt, Germany U.K. Hartel, H. Klingbeil TEMF, TU Darmstadt, Darmstadt, Germany H.G. König GSI, Darmstadt, Germany
	Funding: This work is supported by the German Federal Ministry of Education and Research under grant number 06DA9028I. In a synchrotron, particles are accelerated by repeatedly passing through RF cavities. In the SIS18 synchrotron at GSI, ferrite cavities are used. Each cavity is equipped with local control systems to adjust the amplitude and phase of the accelerating field. In this paper, we consider ferrite cavities of the type that is currently used in the SIS18 at GSI and will be used in the future SIS100 which is being built in the frame of the FAIR project. We analyze the dynamics of the cavities in conjunction with their local control loops. An emphasis is put on the cavities' reaction to changes in the desired amplitude or resonant frequency. Using simulations, we show that the cavities' dynamics hardly influence longitudinal dipole oscillations, and conclude that a high-level model for the RF cavities is sufficient.
	Slides WEAAC3 [1.055 MB]

WEP13	Model-Based Analysis of Digital Signal Processing Blocks in a Beam Phase Control System	164
	C. Spies, M. Glesner TUD, Darmstadt, Germany H. Klingbeil TEMF, TU Darmstadt, Darmstadt, Germany
	Funding: This work is supported by the German Federal Ministry of Education and Research under grant number 06DA9028I. A beam phase control system comprises digital phase detectors and band pass filters to detect coherent longitudinal dipole and higher order bunch oscillations. These digital signal processing functions can be implemented in several ways, e. g. in software or on a programmable logic device. In this paper, we consider different possible implementations and compare them in terms of their real-time performance and their system resource consumption. For the phase detectors, a software implementation is compared against different (e. g. look-up table and CORDIC-based) hardware implementations. For the band pass filters, we consider software, hardware and mixed implementations.