Design of low level RF control for the TESLA superstructure

Author

Michizono, S. ; Liepe, M. ; Simrock, S.N.

Author_Institution

KEK, Tsukuba, Japan

Volume

2

fYear

2001

fDate

2001

Firstpage

1101

Abstract

The superstructure is a viable option for the TESLA linear collider because of a high effective gradient and a reduced number of RF components. However, the high number and close proximity of passband modes impose challenging demands on the RF control system. The control problem is complicated by the fact that the cavity probe signal does not exactly reflect the actual accelerating voltage experienced by the beam due to the different coupling of the generator, pickup probe and beam to the FM passband modes. The digital control system developed for the standard 9-cell cavity is not adequate for operation of the superstructure. As discussed in this paper, an additional filter is needed to guarantee robustness and stability. Based on RF control simulations the filter characteristic is optimized

Keywords

accelerator RF systems; accelerator control systems; digital control; linear colliders; FM passband modes; TESLA linear collider; TESLA superstructure; cavity probe signal; digital control system; filter characteristic; low level RF control design; passband modes; pickup probe; Acceleration; Control systems; Filters; Optical coupling; Particle beams; Passband; Probes; Radio frequency; Robust stability; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001

Conference_Location

Chicago, IL

Print_ISBN

0-7803-7191-7

Type

conf

DOI

10.1109/PAC.2001.986593

Filename

986593