Scattering matrix analysis of the NLC accelerating structure

Abstract

In the Next Linear Collider (NLC), long trains of short, intense bunches are accelerated through the linac on their way to the collision point. One serious problem that needs to be addressed is the multi-bunch beam break-up instability in the linac. To counteract this instability the accelerating structures are designed so that the dipole mode wakefields are detuned and weakly damped. We will employ a computer program that uses such an approach to demonstrate that the scattering matrix method can yield accurate results concerning the wakefields of damped, detuned accelerating structures.