2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83968In designing linear accelerator structures for multi-bunch applications we are often interested in estimating the effect of relatively weak multi-bunch beam break-up (BBU), due to the somewhat complicated wakefields of detuned structures. This, for example, is the case for the injector linacs of the JLC/NLC linear collider project. Deriving an analytical formula for such a problem is the subject of this report.6 pages, 1 figure, became a SLAC-AP report in July 2000Accelerator Physicstext