학술논문
Electron cloud effects in the CERN PS
Document Type
Conference
Author
Source
PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268) Particle accelerator conference Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001. 1:682-684 vol.1 2001
Subject
Language
Abstract
The beam-induced electron cloud build-up is one of the major concerns for the SPS and the design of the future LHC. Recently, this effect has been observed also in the PS with the nominal LHC-type beam, consisting of a batch of 72 bunches of 1.1/spl times/10/sup 11/ p/b spaced by 25 ns. The electron cloud induces baseline distortion in electrostatic pick-up signals that is observed, both in the last turns of the PS when the full bunch length is reduced to less than 4 ns, and in the transfer line between the PS and the SPS rings. Experimental observations are presented and compared to simulation results and predictions from theory. Furthermore, possible cures, such as variation of the bunch spacing, inserting gaps in the bunch train and applying weak solenoidal fields, are also discussed.