Analysis of coupled bunch instability spectra | Zendy

E. Shaposhnikova | Zendy

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Analysis of coupled bunch instability spectra

Author(s) -

E. Shaposhnikova

Publication year - 1999

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.1301890

Subject(s) - instability , physics , envelope (radar) , spectral line , beam (structure) , computational physics , electrical impedance , phase (matter) , large hadron collider , mode (computer interface) , optics , mechanics , computer science , nuclear physics , quantum mechanics , telecommunications , radar , operating system

Beam spectra observed during the development of a coupled bunch instability contain information about the coupled bunch mode n, which describes the phase shift between adjacent bunch oscillations. This number indicates the possible frequency of the guilty impedance with accuracy up to an integer multiple of the bunch spacing frequency. However when there are many possible candidates with imprecisely known frequencies this can be insufficient. In this paper we discuss what additional information about the frequency of the source of instability can be obtained from the analysis of the unstable beam spectra envelope. This is applied to the measurements in the CERN SPS.

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