Application of model independent analysis-based method to accelerator bunch-by-bunch research

In beam diagnostics of the particle accelerator, the acquired bunch-by-bunch beam position data have to be filtered by a noise-reduction process in order to get higher resolution results for future investigation, therefore the model independent analysis (MIA) was extended to the analysis of beam position data during the injection by Beam Diagnostics Group at SSRF. Compared to previous MIA approach, the bunch-by-bunch position data array instead of multi-turn array acquired by multiple probes, was processed by SVD method, and principal motion modes were extracted. Experiments showed that MIA is capable of separating the physical signals from the random noise and highlighting the beam motions which are really cared by the particle accelerator physicists.