Longitudinal Phenomena in the CERN SPS
- 1 June 1977
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Nuclear Science
- Vol. 24 (3) , 1399-1401
- https://doi.org/10.1109/tns.1977.4328957
Abstract
After almost one year of operation two kinds of problems dominate the longitudinal behaviour of the SPS beam. At high energy longitudinal coupled bunch instabilities occur. They are driven by the RF cavity impedance both on its fundamental and high-order passbands. Present cures include damping the high-order modes of the cavities, Landau damping techniques and feedback systems. At the injection energy a debunching-rebunching procedure is performed in order to change from the 9.5 MHz RF frequency of the injector to the 200 MHz of the SPS. Debunched beam instabilities driven by the cavity and vacuum chamber impedances (up to the GHz region) at present limit the RF capture efficiency.Keywords
This publication has 3 references indexed in Scilit:
- Analysis of the high frequency longitudinal instability of bunched beams using a computer modelNuclear Instruments and Methods, 1976
- Effects of Space Charge and Reactive Wall Impedance on Bunched BeamsIEEE Transactions on Nuclear Science, 1975
- A Longitudinal Stability Criterion for Bunched BeamsIEEE Transactions on Nuclear Science, 1973