Generation of a coherent x ray in the water window region at 1 kHz repetition rate using a mid-infrared pump source

2009 ◽  
Vol 34 (11) ◽  
pp. 1747 ◽  
Author(s):  
Hui Xiong ◽  
Han Xu ◽  
Yuxi Fu ◽  
Jinping Yao ◽  
Bin Zeng ◽  
...  
Keyword(s):  
Repetition Rate ◽  
Mid Infrared ◽  
X Ray ◽  
Water Window ◽  
Pump Source ◽  
Window Region

scholarly journals Towards GW-Scale Isolated Attosecond Pulse Far beyond Carbon K-Edge Driven by Mid-Infrared Waveform Synthesizer

2018 ◽  
Vol 8 (12) ◽  
pp. 2451 ◽  
Author(s):  
Yuxi Fu ◽  
Hua Yuan ◽  
Katsumi Midorikawa ◽  
Pengfei Lan ◽  
Eiji Takahashi
Keyword(s):  
Single Cycle ◽  
High Order Harmonic Generation ◽  
Mid Infrared ◽  
X Ray ◽  
Water Window ◽  
High Order Harmonic ◽  
Optical Parametric ◽  
Isolated Attosecond Pulse ◽  
Window Region ◽  
The Continuum

We discuss the efficient generation of intense “water window” (0.28–0.54 keV) isolated attosecond pulses (IAPs) using a mid-infrared (MIR) waveform synthesizer. Our numerical simulations clearly indicate that not only a longer-wavelength driving laser but also a weak control pulse in the waveform synthesizer helps extend the continuum cutoff region and reduce the temporal chirp of IAPs in high-order harmonic generation (HHG). This insight indicates that a single-cycle laser field is not an optimum waveform for generating the shortest IAP from the veiwpoints of reducing the attochirp and increasing the efficiency of HHG. By combining a waveform synthesizer technology and a 100 mJ MIR femtosecond pulse based on a dual-chirped optical parametric amplification (DC-OPA) method, a gigawatt-scale IAP (55 as with 10 nJ order) in the water window region can be generated even without attochirp compensation. The MIR waveform synthesizer is highly beneficial for generating a shorter IAP duration in the soft X-ray region because there are no suitable transparent dispersive materials that can be used for compressing the attochirp.

Soft X‐ray Detectors Based on SnS Nanosheets for the Water Window Region

2021 ◽  
pp. 2105038
Author(s):  
Babar Shabbir ◽  
Jingying Liu ◽  
Vaishnavi Krishnamurthi ◽  
R. A. W. Ayyubi ◽  
Kevin Tran ◽  
...  
Keyword(s):  
X Ray ◽  
Water Window ◽  
Window Region

Compact high-flux hard X-ray source driven by femtosecond mid-infrared pulses at a 1  kHz repetition rate

2021 ◽  
Vol 46 (2) ◽  
pp. 210
Author(s):  
Azıze Koç ◽  
Chrıstoph Hauf ◽  
Mıchael Woerner ◽  
Lorenz von grafensteın ◽  
Dennıs Ueberschaer ◽  
...  
Keyword(s):  
Repetition Rate ◽  
High Flux ◽  
Mid Infrared ◽  
X Ray

scholarly journals High Reflectance Nanoscale V/Sc Multilayer for Soft X-ray Water Window Region

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Qiushi Huang ◽  
Qiang Yi ◽  
Zhaodong Cao ◽  
Runze Qi ◽  
Rolf A. Loch ◽  
...  
Keyword(s):  
X Ray ◽  
Water Window ◽  
Window Region ◽  
High Reflectance

scholarly journals Рентгеновские лазеры в потоках кластеров и в наноструктурированных мишенях

2019 ◽  
Vol 127 (7) ◽  
pp. 74
Author(s):  
Е.П. Иванова
Keyword(s):  
Steady State ◽  
Model Potential ◽  
Zero Approximation ◽  
Quasi Steady State ◽  
X Ray ◽  
Water Window ◽  
Xenon Cluster ◽  
Relativistic Perturbation Theory ◽  
Window Region ◽  
Cluster Flow

AbstractThe paper presents a brief review of recent works concerning the modeling of X-ray lasers in cluster flows and in nanostructured targets. Calculations of the atomic characteristics are based on relativistic perturbation theory with a model potential of zero approximation. Two new results are discussed: (1) it is shown that a subpicosecond X-ray laser with λ = 41.8 nm formed in a xenon cluster flow can serve as an alternative to a free-electron laser and (2) in heavy Ni-like ions ( Z ≥ 60), the ionization of ions and recombination of electrons are balanced at electronic temperatures ≥1500 eV; thus, the state of a Ni-like ion is quasi-steady-state. The inversions of many transition levels of an X-ray laser are also quasi-steady-state. The possibility of experimental observation of X-ray lasers based on 3 p ^54 d ^104 p [ J = 0] – 3 p ^63 d ^94 p [ J = 1] intrashell transitions in Gd^36+ with wavelengths in the water window region is discussed.

High-flux table-top hard X-ray source driven by femtosecond mid-infrared pulses at a 1 kHz repetition rate

2021 ◽  
Author(s):  
A. Koç ◽  
C. Hauf ◽  
M. Woerner ◽  
L. von Grafenstein ◽  
D. Ueberschaer ◽  
...  
Keyword(s):  
Repetition Rate ◽  
High Flux ◽  
Mid Infrared ◽  
X Ray

Enhancement of attosecond pulse in water window region by using pump-probe approach

2018 ◽  
Vol 32 (29) ◽  
pp. 1850318 ◽  
Author(s):  
Hang Liu ◽  
Yi Li ◽  
Rich S. Castle
Keyword(s):  
Probe Pulse ◽  
Fourier Transformation ◽  
Pulse Signal ◽  
Ionization Probability ◽  
Probe Laser ◽  
Resonance Ionization ◽  
Pump Probe ◽  
Mid Infrared ◽  
Water Window ◽  
Window Region

An effective scheme to enhance the harmonic yield and the attosecond (as) pulse signal from H[Formula: see text] has been proposed by using the pump-probe laser field. It is found that with the help of the multi-cycle pump pulse, H[Formula: see text] can be steered into the resonance ionization regions, where the ionization probability can be remarkably enhanced. Thus, the harmonic yield can be remarkably enhanced when a sequential mid-infrared probe pulse is added. Further, by modulating the phase of the probe pulse and by adding a controlling pulse, the harmonic cutoff can be extended up to the water window region. Finally, by the Fourier transformation of the selected harmonics on the harmonic supercontinuum, the water window attosecond pulses as short as 25 as can be obtained.

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