title: Generation of a coherent x ray in the water window region at 1 kHz repetition rate using a mid-infrared pump source.
abstract: We demonstrate the generation of a coherent x ray in the water window region in a gas cell filled with neon gas using a wavelength-tunable mid-IR femtosecond laser operating at 1 kHz repetition rate. The cutoff energy and conversion efficiency of the water window x ray can be optimized by tuning gas pressure as well as the focal position.
authors.affiliation: State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Xiong
authors.forename: Han
authors.initials: H
authors.lastname: Xu
authors.forename: Yuxi
authors.initials: Y
authors.lastname: Fu
authors.forename: Jinping
authors.initials: J
authors.lastname: Yao
authors.forename: Bin
authors.initials: B
authors.lastname: Zeng
authors.forename: Wei
authors.initials: W
authors.lastname: Chu
authors.forename: Ya
authors.initials: Y
authors.lastname: Cheng
authors.forename: Zhizhan
authors.initials: Z
authors.lastname: Xu
authors.forename: Eiji J
authors.initials: EJ
authors.lastname: Takahashi
authors.forename: Katsumi
authors.initials: K
authors.lastname: Midorikawa
authors.forename: X
authors.initials: X
authors.lastname: Liu
authors.forename: J
authors.initials: J
authors.lastname: Chen
mesh_terms: D007259:Infrared Rays; D007834:Lasers; D009356:Neon / Q000737:chemistry; D011312:Pressure; D014867:Water; D014965:X-Rays
chemical_list: D014867:Water; D009356:Neon