Speaker
Theo Demma
(INFN LNF)
Description
A strong horizontal instability limiting the positron current has been observed at DAFNE since the installation of the FINUDA detector in 2003. Experiments and simulations seem to provide an evidence that the electron cloud build-up in the wigglers and bending magnets of the DAFNE positron ring induces a coupled bunch instability with features compatible with observations . To better understand the electron cloud effects and possibly to find a remedy, a detailed simulation study is undergoing. In this communication we present recent simulation results relative to the build up of the electron cloud, also taking into account the effect of clearing electrodes in the dipoles and wigglers of the DAFNE positron ring. The resulting electron cloud distribution is used to study both coupled and single bunch induced instabilities.
Primary author
Theo Demma
(INFN LNF)
