title: Experimental observation of suppression of coherent-synchrotron-radiation-induced beam-energy spread with shielding plates.
abstract: We describe the first direct observation of the significant suppression of the energy spread induced by coherent synchrotron radiation by a pair of conductive plates placed inside a dipole magnet. In addition to various feedback loops improving the energy stability of the beam parameters, our key innovation for this experiment is the observation of the time-resolved energy variation within the electron bunch, instead of the traditionally measured rms energy spread. We present the results of the experiments and compare them with a rigorous analytical theory.
authors.affiliation: Brookhaven National Laboratory, 820, Upton, New York 11973, USA.
authors.forename: V
authors.initials: V
authors.lastname: Yakimenko
authors.forename: M
authors.initials: M
authors.lastname: Fedurin
authors.forename: V
authors.initials: V
authors.lastname: Litvinenko
authors.forename: A
authors.initials: A
authors.lastname: Fedotov
authors.forename: D
authors.initials: D
authors.lastname: Kayran
authors.forename: P
authors.initials: P
authors.lastname: Muggli