Analysis of the TLS longitudinal feedback system

Author

Lau, W.K. ; Kuo, C.H.

Author_Institution

SRRC, Tsinchu, Taiwan

Volume

2

fYear

1999

fDate

1999

Firstpage

1165

Abstract

Effectiveness of the TLS longitudinal feedback system to damp bunch phase oscillations has been studied under various operation conditions. The maximum kick voltage that is available for bunch phase correction is limited by power amplifier saturation. Operation of the feedback system in the linear and nonlinear regions of the power amplifier have been simulated. In the case of power amplifier saturation, the damping time is proportional to the initial oscillation amplitude. The oscillation amplitude decrease linearly before the power amplifier reaches its linear regime. The effects of a hold buffer in the DAC/MUX unit and time delay of the feedback loop will also be discussed

Keywords

accelerator control systems; digital-analogue conversion; electron accelerators; feedback; particle beam bunching; power amplifiers; storage rings; DAC/MUX unit; TLS; Taiwan Light Source; bunch phase correction; bunch phase oscillations; damping time; hold buffer; kick voltage; longitudinal feedback system; oscillation amplitude; power amplifier saturation; time delay; Circuit simulation; Computer simulation; Damping; Delay effects; Feedback loop; Power amplifiers; Predictive models; Radiofrequency amplifiers; Tuners; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.795483

Filename

795483