Slow feedback loops for a Landau cavity with high beam loading

Author

Towne, N.

Author_Institution

Nat. Synchrotron Light Source, Brookhaven Nat. Lab., Upton, NY, USA

Volume

2

fYear

1999

fDate

1999

Firstpage

1031

Abstract

Equilibrium bunch shapes for bunches stretched with a higher-harmonic cavity are sensitive functions of beam and RF parameters. This paper gives results of calculations of equilibrium bunch shapes as a function of Landau-cavity phase, the relationship between the stretched-beam phase and slow feedback controls for the cavity is described, and a control system capable of stretching, compressing, controlling the cavity phase arbitrarily (within the limits of the power amplifier), and operating without beam for use in the NSLS Vacuum-Ultraviolet (VUV) ring is presented. The last is compared with the existing RF controls for the VUV-ring harmonic cavity

Keywords

accelerator cavities; accelerator control systems; electron accelerators; feedback; particle beam bunching; storage rings; Landau-cavity phase; NSLS Vacuum-Ultraviolet ring; RF parameters; VUV-ring harmonic cavity; equilibrium bunch shapes; high beam loading; higher-harmonic cavity; power amplifier; slow feedback controls; slow feedback loops; stretched-beam phase; Control systems; Feedback loop; Forward contracts; Phase detection; Potential well; Power transmission lines; Radio frequency; Radiofrequency amplifiers; Shape control; 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.1999.795438

Filename

795438