Methods of measurement for the beam-based alignment system in HLS

Author

Cao, Yong ; Sun, Baogen ; Lu, Ping ; Li, Weimin ; He, Duohui ; Liu, Zuping ; Xu, Hongliang ; Wang, Junhua ; Zheng, Pu ; Li, Jihao ; Zhang, Chunhui

Author_Institution

NSRL, Univ. of Sci. & Technol. of China, Hefei, China

Volume

3

fYear

2004

fDate

16-22 Oct. 2004

Firstpage

1803

Abstract

The beam-based alignment system is given in HLS (Hefei light source), in which a switchable shunt resistor was installed on quadrupole to bypass a small percentage of the magnet current. The system can be used to position the beam in the magnetic center of quadrupoles. In measurement, some methods (linear fitting with single corrector, parabola fitting with single corrector, linear fitting with local bump, and parabola fitting with local bump) are used. These measurement results are given, and compared among above methods.

Keywords

accelerator magnets; beam handling techniques; particle beam diagnostics; resistors; Hefei light source; beam position monitors; beam-based alignment system; linear fitting; magnet current; parabola fitting; quadrupole magnetic center; switchable shunt resistor; Control systems; Distortion measurement; Extraterrestrial measurements; High level synthesis; Light sources; Magnetic switching; Power supplies; Power system relaying; Resistors; Storage rings;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2004 IEEE

Conference_Location

Rome

ISSN

1082-3654

Print_ISBN

0-7803-8700-7

Electronic_ISBN

1082-3654

Type

conf

DOI

10.1109/NSSMIC.2004.1462593

Filename

1462593