Generation and application of ultrashort X-ray pulses

Linde, D. von der; Sokolowski‐Tinten, K.; Blome, C.; Dietrich, C.; Zhou, Ping; Tarasevitch, A.; Cavalleri, A.; Siders, C. W.; Barty, C. P. J.; Squier, Jeff; Wilson, Kent R.; Uschmann, I.; Förster, E.

doi:10.1017/s0263034601191020

Cited by 28 publications

(9 citation statements)

References 9 publications

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“…These sources are characterized by subpicosecond time duration 27 (shorter than the hydrodynamic time) and a spectrum with few energetic lines ( Kα , Kβ etc.) sitting on Bremsstrahlung continuum 28 . The energy conversion efficiency, from laser to X-rays, for on-target laser intensities above 10 18 W/cm 2 oscillates between 29 1 × 10 −5 and 3 × 10 −4 .…”

Section: Introductionmentioning

confidence: 99%

Quantitative phase contrast imaging of a shock-wave with a laser-plasma based X-ray source

Barbato

Atzeni

Batani

et al. 2019

Sci Rep

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X-ray phase contrast imaging (XPCI) is more sensitive to density variations than X-ray absorption radiography, which is a crucial advantage when imaging weakly-absorbing, low-Z materials, or steep density gradients in matter under extreme conditions. Here, we describe the application of a polychromatic X-ray laser-plasma source (duration ~0.5 ps, photon energy >1 keV) to the study of a laser-driven shock travelling in plastic material. The XPCI technique allows for a clear identification of the shock front as well as of small-scale features present during the interaction. Quantitative analysis of the compressed object is achieved using a density map reconstructed from the experimental data.

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Section: Introductionmentioning

confidence: 99%

Quantitative phase contrast imaging of a shock-wave with a laser-plasma based X-ray source

Barbato

Atzeni

Batani

et al. 2019

Sci Rep

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“…The generation of attosecond pulses (APs) opens the possibility to probe and even manipulate ultra-fast electron dynamics occurring in atomic structures (Von der Linde et al, 2001;Corkum & Krausz, 2007;Mourou et al, 2007;Midorikawa, 2011). Currently, the well-known schemes to produce APs include high harmonics generation (HHG) from laser-atom interaction at moderate laser intensity (Salieres et al, 1995;Hergott et al, 2002;Takahashi et al, 2004;Nabekawa et al, 2009) or HHG from laser-solid interaction at relativistic laser intensity (Naumova et al, 2004;Quere et al, 2006;Tsakiris et al, 2006;Zheng et al, 2006;Baeva et al, 2007;Dromey et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Ultra-intense attosecond pulses emitted from laser wakefields in non-uniform plasmas

Liu

Zeng

et al. 2013

Laser Part. Beams

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A scheme of generating ultra-intense attosecond pulses in ultra-relativistic laser interaction with under-dense plasmas is proposed. The attosecond pulse emission is caused by an oscillating transverse current sheet formed by an electron density spike composed of trapped electrons in the laser wakefield and the residual transverse momentum of electrons left behind the laser pulse when its front is strongly modulated. As soon as the attosecond pulse emerges, it tends to feed back to further enhance the transverse electron momentum and the transverse current. Consequently, the attosecond pulse is enhanced and developed into a few cycles later until the density spike is depleted out due to the pump laser depletion. To control the formation of the transverse current sheet, a non-uniform plasma slab with an up-ramp density profile in front of a uniform region is adopted, which enables one to obtain attosecond pulses with higher amplitudes than that in a uniform plasma slab.

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“…The detailed characteristics of multi-keV X-ray emission are important to optimize X-ray sources or design experiments. Some papers pay attention to the influence of the laser focus spot size (Mattews et al, 1983;Workman et al, 2003;Workman & Kyrala, 2001a, 2001bRiley et al, 2002b), the laser wavelength (Kauffman, 1991;Hu et al, 2008;Mattews et al, 1983;Yaakobi et al, 1981;Kodama et al, 1986), the laser incidence angle (Mattews et al, 1983), or the laser pulse duration (Mattews et al, 1983;Workman & Kyrala, 2001a, 2001bRiley et al, 2002b;Dunn et al, 1995;Phillion & Hailey, 1986;Kodama et al, 1987;Teubner et al, 1991;Pelletier et al, 1997;Girard et al, 2004;Eidmann & Schwanda, 1991;Limpouch et al, 2002;Von Der Linde et al, 2001), etc. Some papers pay attention to the influence of the laser focus spot size (Mattews et al, 1983;Workman et al, 2003;Workman & Kyrala, 2001a, 2001bRiley et al, 2002b), the laser wavelength (Kauffman, 1991;Hu et al, 2008;Mattews et al, 1983;Yaakobi et al, 1981;Kodama et al, 1986), the laser incidence angle (Mattews et al, 1983), or the laser pulse duration (Mattews et al, 1983;Workman & Kyrala, 2001a…”

Section: Introductionmentioning

confidence: 99%

Angular distribution and conversion of multi-keV L-shell X-ray sources produced from nanosecond laser irradiated thick-foil targets

Zhang

Zheng

et al. 2008

Laser Part. Beams

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An experimental study on the angular distribution and conversion of multi-keV X-ray sources produced from 2 ns-duration 527nm laser irradiated thick-foil targets on Shenguang II laser facility (SG-II) is reported. The angular distributions measured in front of the targets can be fitted with the function of f(u) ¼ aþ (12a)cos b u (u is the viewing angle relative to the target normal), where a ¼ 0.41 + 0.014, b ¼ 0.77 + 0.04 for Ti K-shell X-ray sources (4.75 keV for Ti K-shell), and a ¼ 0.085 + 0.06, b ¼ 0.59 + 0.07 for Ag/Pd/Mo L-shell X-ray sources (2-2.8 keV for Mo L-shell, 2.8-3.5 keV for Pd L-shell, and 3-3.8 keV for Ag L-shell). The isotropy of the angular distribution of L-shell emission is worse than that of the K-shell emission at larger viewing angle (.708), due to its larger optical depth (stronger self-absorption) in the cold plasma side lobe surrounding the central emission region, and in the central hot plasma region (emission region). There is no observable difference in the angular distributions of the L-shell X-ray emission among Ag, Pd, and Mo. The conversion efficiency of Ag/Pd/Mo L-shell X-ray sources is higher than that of the Ti K-shell X-ray sources, but the gain relative to the K-shell emission is not as high as that by using short pulse lasers. The conversion efficiency of the L-shell X-ray sources decreases with increasing atomic numbers (or X-ray photon energy), similar to the behavior of the K-shell X-ray source.

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Generation and application of ultrashort X-ray pulses

Cited by 28 publications

References 9 publications

Quantitative phase contrast imaging of a shock-wave with a laser-plasma based X-ray source

Quantitative phase contrast imaging of a shock-wave with a laser-plasma based X-ray source

Ultra-intense attosecond pulses emitted from laser wakefields in non-uniform plasmas

Angular distribution and conversion of multi-keV L-shell X-ray sources produced from nanosecond laser irradiated thick-foil targets

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