title: X-ray emission from betatron motion in a plasma wiggler.
abstract: The successful utilization of an ion channel in a plasma to wiggle a 28.5-GeV electron beam to obtain broadband x-ray radiation is reported. The ion channel is induced by the electron bunch as it propagates through an underdense 1.4-meter-long lithium plasma. The quadratic density dependence of the spontaneously emitted betatron x-ray radiation and the divergence angle of approximately (1-3)x10(-4) radian of the forward-emitted x-rays as a consequence of betatron motion in the ion channel are in good agreement with theory. The absolute photon yield and the peak spectral brightness at 14.2-keV photon energy are estimated.
authors.affiliation: University of California, Los Angeles, California 90095, USA.
authors.forename: Shuoqin
authors.initials: S
authors.lastname: Wang
authors.forename: C E
authors.initials: CE
authors.lastname: Clayton
authors.forename: B E
authors.initials: BE
authors.lastname: Blue
authors.forename: E S
authors.initials: ES
authors.lastname: Dodd
authors.forename: K A
authors.initials: KA
authors.lastname: Marsh
authors.forename: W B
authors.initials: WB
authors.lastname: Mori
authors.forename: C
authors.initials: C
authors.lastname: Joshi
authors.forename: S
authors.initials: S
authors.lastname: Lee
authors.forename: P
authors.initials: P
authors.lastname: Muggli
authors.forename: T
authors.initials: T
authors.lastname: Katsouleas
authors.forename: F J
authors.initials: FJ
authors.lastname: Decker
authors.forename: M J
authors.initials: MJ
authors.lastname: Hogan
authors.forename: R H
authors.initials: RH
authors.lastname: Iverson
authors.forename: P
authors.initials: P
authors.lastname: Raimondi
authors.forename: D
authors.initials: D
authors.lastname: Walz
authors.forename: R
authors.initials: R
authors.lastname: Siemann
authors.forename: R
authors.initials: R
authors.lastname: Assmann