Experimental measurements of third-order resonance islands at the Photon Factory storage ring

Author

Miyajima, Tsukasa ; Kobayashi, Yukinori ; Ohmi, Kazuhito

Author_Institution

KEK, High Energy Accelerator Res. Organ., Ibaraki, Japan

Volume

3

fYear

2001

fDate

2001

Firstpage

1729

Abstract

The coherent betatron motions after a vertical kick were examined with various field strengths of the octupole magnets near the third-order resonance line(3ν_y=13), at the KEK-Photon Factory electron storage ring (PF-ring). At a particular condition, the particles were trapped in the resonance islands. The responses depended on the strength of octupole magnetic fields. As a result, we guess that the dependency of the motion in the resonance islands is generated by a slight difference of the amplitude dependent tune shift due to the octupole magnets

Keywords

accelerator magnets; electromagnets; electron accelerators; storage rings; KEK-Photon Factory electron storage ring; amplitude dependent tune shift; coherent betatron motions; octupole magnets; third-order resonance islands; vertical kick; Magnetic fields; Magnetic resonance; Magnets; Monitoring; Motion measurement; Optical distortion; Particle accelerators; Production facilities; Storage rings; Topology;

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.2001.987163

Filename

987163