Title :
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
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(3νy=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;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987163
