title: Measurements of radiation near an atomic spectral line from the interaction of a 30 GeV electron beam and a long plasma.
abstract: Emissions produced or initiated by a 30-GeV electron beam propagating through a approximately 1-m long heat pipe oven containing neutral and partially ionized vapor have been measured near atomic spectral lines in a beam-plasma wakefield experiment. The Cerenkov spatial profile has been studied as a function of oven temperature and pressure, observation wavelength, and ionizing laser intensity and delay. The Cerenkov peak angle is affected by the creation of plasma, and estimates of neutral and plasma density have been extracted. Increases in visible background radiation, consistent with increased plasma recombination emissions due to dissipation of wakefields, were simultaneously measured.
authors.affiliation: Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA.
authors.forename: P
authors.initials: P
authors.lastname: Catravas
authors.forename: S
authors.initials: S
authors.lastname: Chattopadhyay
authors.forename: E
authors.initials: E
authors.lastname: Esarey
authors.forename: W P
authors.initials: WP
authors.lastname: Leemans
authors.forename: R
authors.initials: R
authors.lastname: Assmann
authors.forename: F J
authors.initials: FJ
authors.lastname: Decker
authors.forename: M J
authors.initials: MJ
authors.lastname: Hogan
authors.forename: R
authors.initials: R
authors.lastname: Iverson
authors.forename: R H
authors.initials: RH
authors.lastname: Siemann
authors.forename: D
authors.initials: D
authors.lastname: Walz
authors.forename: D
authors.initials: D
authors.lastname: Whittum
authors.forename: B
authors.initials: B
authors.lastname: Blue
authors.forename: C
authors.initials: C
authors.lastname: Clayton
authors.forename: C
authors.initials: C
authors.lastname: Joshi
authors.forename: K A
authors.initials: KA
authors.lastname: Marsh
authors.forename: W B
authors.initials: WB
authors.lastname: Mori
authors.forename: S
authors.initials: S
authors.lastname: Wang
authors.forename: T
authors.initials: T
authors.lastname: Katsouleas
authors.forename: S
authors.initials: S
authors.lastname: Lee
authors.forename: P
authors.initials: P
authors.lastname: Muggli