K-shell x-ray emission enhancement via self-guided propagation of intense laser pulses in Ar clusters.
K-shell x-ray at about 3 keV emitted from Ar clusters irradiated by 110 mJ 55 fs intense laser pulses is studied. The x-ray flux is optimized by moving the nozzle away from the focus of the laser pulse. The total flux of K-shell x-ray photons in 4pi reaches a maximum of 4.5x10(9) photons/shot with a conversion efficiency of 2.5x10(-5) when the nozzle displacement is 2 mm and a long plasma channel is observed by a probe beam.
Liu
Feng
F
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, PR China.
Chen
Li-Ming
LM
Lin
Xiao-Xuan
XX
Liu
Feng
F
Ma
Jing-Long
JL
Li
Run-Ze
RZ
Li
Yu-Tong
YT
Wang
Zhao-Hua
ZH
Wang
Shou-Jun
SJ
Wei
Zhi-Yi
ZY
Zhang
Jie
J