Commissioning experience from PEP-II HER longitudinal feedback | Zendy

S. Prabhakar | Zendy; D. Teytelman | Zendy; J. Fox | Zendy; A. J. Young | Zendy; P. Corredoura | Zendy; Roberto Tighe | Zendy

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Commissioning experience from PEP-II HER longitudinal feedback

Author(s) -

S. Prabhakar,

D. Teytelman,

J. Fox,

A. J. Young,

P. Corredoura,

Roberto Tighe

Publication year - 1998

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 - 10.1063/1.57037

Subject(s) - physics , harmonics , beam (structure) , electrical impedance , transient (computer programming) , landau damping , instability , phase (matter) , storage ring , optics , mechanics , nuclear physics , voltage , computer science , plasma , quantum mechanics , operating system

.The DSP-based bunch-by-bunch feedback system installed in the PEPIIhigh-energy ring #HER# has been used to damp instabilities induced byunwantedhigher-order modes #HOMs# at beam currents up to 605 mA during commissioning.Beam pseudospectra calculated from feedback system data indicate the presence ofcoupled-bunch modes that coincide with a previously observed cavity mode #0-M-2#.Bunch current and synchronous phase measurements are also extracted from thedata. These measurements...

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