Phys. Rev. ST Accel. Beams 5, 084401 (2002) [4 pages]Overcoming a fast transverse instability by means of octupole-induced tune spread in the Relativistic Heavy Ion Collider
During the Relativistic Heavy Ion Collider commissioning in 2001 a fast transverse instability was observed on the ramp. In general this could be counteracted with increased chromaticity, resulting in Landau damping. However this method could not be applied around transition energy where chromaticities have to change sign. So octupoles were used near transition energy to create transverse Landau damping and avoid the transverse instability, emittance blowup, and beam loss. This paper describes the considerations that led to the present scheme, as well as experimental results. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevSTAB.5.084401
DOI:
10.1103/PhysRevSTAB.5.084401
PACS:
29.27.Bd, 29.20.Lq
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.