X-ray emission from betatron motion in a plasma wiggler.
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.
Wang
Shuoqin
S
University of California, Los Angeles, California 90095, USA.
Clayton
C E
CE
Blue
B E
BE
Dodd
E S
ES
Marsh
K A
KA
Mori
W B
WB
Joshi
C
C
Lee
S
S
Muggli
P
P
Katsouleas
T
T
Decker
F J
FJ
Hogan
M J
MJ
Iverson
R H
RH
Raimondi
P
P
Walz
D
D
Siemann
R
R
Assmann
R
R