Paper  Title  Page 

WEO2C05  Wake Functions for Laminated Magnets and Applications for Fermilab Booster Synchrotron  529 


The Fermilab Booster beam is exposed to magnet laminations, resulting in impedance effects much larger than resistive wall effects in a beam pipe. We present a calculation of wake functions in laminated magnets, which show large values at distances of the order of a few meters, but decrease quickly to zero beyond that. Therefore, strong inbunch and nearestbunch effects are present. We show realistic Synergia simulations of the Booster using these wake functions and spacecharge solvers appropriate for the various geometries of the constituent elements of the machine. The simulation of tune shifts is in good agreement with experimental data. We find that wake fields in the Booster magnet laminations strongly increase beam emittance and have the potential to cause significant beam loss. 

