Modelling of an Inner-Shell Photo-Ionization X-Ray Laser Using a Recently Demonstrated Betatron Source

Jacquemot, S.; Phuoc, K. Ta; Rousse, A.; Sebban, S.

doi:10.1007/978-1-4020-6018-2_38

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…For example, transient changes in the absorption of an isolated attosecond pulse in the presence of a synchronized few-cycle laser pulse were observed in valence electron wavepackets in field-ionized krypton 17 , autoionizing states of argon 18 , and Stark-shifted excited states of helium 19 , where irreversible processes play a tiny role in the ultrafast timescale. More recently, strong field physics of light-matter interactions has expanded from the long- and intermediate-wavelength regime into the X-ray regime, such as the Linac Coherent Light Source (LCLS) 20 and a series of pioneer experiments and proposals 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 , where one opened a new era of exploring the interaction of high-intensity X rays with complex systems on femtosecond (fs) timescales which are never accessed experimentally before 21 . In a further experiment, a successful coherent free-electron laser radiation pulses in the soft X-ray regime have been generated 40 , which experimentally provides the possibility for investigating the interplay between coherence and dissipation in X-ray-laser-matter systems, such as coherent control of electronic response in the fs core-hole lifetimes 41 42 .…”

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Coherence and resonance effects in the ultra-intense laser-induced ultrafast response of complex atoms

Cheng

Dong

et al. 2016

Sci Rep

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Both coherent pumping and energy relaxation play important roles in understanding physical processes of ultra-intense coherent light-matter interactions. Here, using a large-scale quantum master equation approach, we describe dynamical processes of practical open quantum systems driven by both coherent and stochastic interactions. As examples, two typical cases of light-matter interactions are studied. First, we investigate coherent dynamics of inner-shell electrons of a neon gas irradiated by a high-intensity X-ray laser along with vast number of decaying channels. In these single-photon dominated processes, we find that, due to coherence-induced Rabi oscillations and power broadening effects, the photon absorptions of a neon gas can be suppressed resulting in differences in ionization processes and final ion-stage distributions. Second, we take helium as an example of multiphoton and multichannel interference dominated electron dynamics, by investigating the transient absorption of an isolated attosecond pulse in the presence of a femtosecond infrared laser pulse.

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confidence: 99%

Coherence and resonance effects in the ultra-intense laser-induced ultrafast response of complex atoms

Cheng

Dong

et al. 2016

Sci Rep

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“…20 We propose a lasing scheme of broad capability, by photo-pumping an inner-shell XRL 21 with an XFEL. The method can be applied to a broad variety of gain materials.…”

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Pumping a photoionization atomic inner-shell x-ray laser by x-ray free-electron laser radiation

Rohringer

London

2009

SPIE Proceedings

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Focusing an x-ray free electron laser (XFEL) pulse into a gas target, a plasma of transiently core excited ions can be created within a few fs, building a pathway to an inner-shell keV x-ray laser. Varying the XFEL parameters, a wide variety of pulse structures can be created with comparable peak-intensities to XFELs: isolated pulses of subfs duration, trains of pulses with increased temporal coherence, and trains of fs pulses of different wavelengths. We present self-consistent gain and amplification calculations, tailored to predict first experiments on lasing in neon pumped by the Linac Coherent Light Source at Stanford.

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Femtosecond coherent pulses in the keV range from inner-shell transitions pumped by a betatron source

et al. 2010

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International audienceWe present a new method to generate ultra-short X-ray laser pulses by using the recently demonstrated laser-driven betatron source to photo-pump inner-shell transitions. The proposed compact set-up will then open the route to a wide range of applications. The betatron spectrum and ion-population kinetics are modeled and the temporal evolution of the gain coefficient for the K-α transitions is assessed. Using measured values of divergence, duration, and number of photons per pulse of the betatron source as input parameters, local gain values close to 60 cm^−1 are calculated for nitrogen at 3.2 nm. Significant gain values are also numerically obtained at shorter wavelengths (for neon at 1.5 nm) when the betatron energy distribution is optimized as suggested by recent laser wakefield electron acceleration experiments

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Modelling of an Inner-Shell Photo-Ionization X-Ray Laser Using a Recently Demonstrated Betatron Source

Cited by 3 publications

References 8 publications

Coherence and resonance effects in the ultra-intense laser-induced ultrafast response of complex atoms

Coherence and resonance effects in the ultra-intense laser-induced ultrafast response of complex atoms

Pumping a photoionization atomic inner-shell x-ray laser by x-ray free-electron laser radiation

Femtosecond coherent pulses in the keV range from inner-shell transitions pumped by a betatron source

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