Collective effects in the PLS storage ring

Author

Kim, Eun-San

Author_Institution

Pohang Accelerator Lab, POSTECH, Pohang, South Korea

Volume

3

fYear

2001

fDate

2001

Firstpage

1945

Abstract

Stored beam currents of 2.0 GeV at the PLS ring has been limited by coupled-bunch instabilities. It was found that beam currents in 2.0 GeV was mainly limited by 830.45 MHz transverse mode in RF cavities. Beam instabilities dependences on betatron tune and chromaticity were extensively investigated in the ring. Longitudinal coupled-bunch instabilities due to 758.66 MHz and 1300 MHz modes does not lead to beam loss up to 450 mA. The beam tail distribution and beam lifetime in 2.5 GeV are estimated by a simulation method. The result shows beam lifetime of 27 hours in 170 mA. The estimated lifetime shows a good agreement with that of normal beam operation

Keywords

accelerator RF systems; accelerator cavities; electron accelerators; electron beams; particle beam bunching; particle beam dynamics; particle beam stability; storage rings; 1300 MHz; 170 mA; 2.0 GeV; 2.5 GeV; 27 h; 450 mA; 758.66 MHz; 830.45 MHz; PLS storage ring; beam lifetime; beam loss; beam tail distribution; betatron tune; chromaticity; collective effects; longitudinal coupled-bunch instabilities; normal beam operation; radiofrequency cavities; stored beam currents; transverse mode; Frequency conversion; Frequency estimation; Frequency measurement; Life estimation; Lifetime estimation; Linear particle accelerator; Optical coupling; Particle beams; Probability distribution; Storage rings;

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.2001.987237

Filename

987237