Observation of Parasitic Beam and Cleaning with Transverse Damper

It was demonstrated that using the existing transverse damper hardware in the SPS a consecutive string of bunches in the middle of a coasting batch of LHC type beam could be cleaned of particles below 5% of the initial level. In parallel first tests were tried for techniques to detect parasitic beam (i.e. non-captured beam or beam captured outside the batches) by RF means and observe the effect of cleaning outside the batches. This is a pilot experiment for a similar application in LHC. It may also have other applications, e.g. to clean the beam in the SPS from unwanted bunches before ejection towards LHC.