Brilliant femtosecond-laser-driven hard X-ray flashes from carbon nanotube plasma

Shou, Yinren; Wang, Pengjie; Lee, Seung-Geun; Rhee, Yong Joo; Lee, Hwang Woon; Yoon, Jun‐Bo; Sung, Jae Hee; Lee, Seong Ku; Pan, Zhuo; Kong, Defeng; Mei, Zhusong; Li, Jianbo; Xu, Songyun; Deng, Zhigang; Zhou, Weimin; Tajima, T.; Choi, Il Woo; Yan, Xueqing; Nam, Chang Hee; Ma, Wu

doi:10.1038/s41566-022-01114-8

Cited by 30 publications

(23 citation statements)

References 32 publications

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“…At the same time, by choosing a micrometric DLT with low-Z layers, we can focus on NICS also in non-extreme regimes of laser-plasma interaction (a 0 ~20-60) since bremsstrahlung production yield has proven to be low in this case [45,46]. Very recently, proof of highly efficient photon generation via NICS in DLTs has been obtained experimentally [47], confirming the expectations and relevance of this approach.…”

Section: Introductionsupporting

confidence: 57%

Numerical investigation of non-linear inverse Compton scattering in double-layer targets

Galbiati

Formenti²,

Grech³

et al. 2023

Front. Phys.

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Non-linear inverse Compton scattering (NICS) is of significance in laser-plasma physics and for application-relevant laser-driven photon sources. Given this interest, we investigated this synchrotron-like photon emission in a promising configuration achieved when an ultra-intense laser pulse interacts with a double-layer target (DLT). Numerical simulations with two-dimensional particle-in-cell codes and analytical estimates are used for this purpose. The properties of NICS are shown to be governed by the processes characterizing laser interaction with the near-critical and solid layers composing the DLT. In particular, electron acceleration, laser focusing in the low-density layer, and pulse reflection on the solid layer determine the radiated power, the emitted spectrum, and the angular properties of emitted photons. Analytical estimates, supported by simulations, show that quantum effects are relevant at laser intensities as small as ∼1021 W/cm2 Target and laser parameters affect the NICS competition with bremsstrahlung and the conversion efficiency and average energy of emitted photons. Therefore, DLT properties could be exploited to tune and enhance photon emission in experiments and future applications.

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Section: Introductionsupporting

confidence: 57%

Numerical investigation of non-linear inverse Compton scattering in double-layer targets

Galbiati

Formenti²,

Grech³

et al. 2023

Front. Phys.

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“…3a, betatron spectra acquired at 0° and ±10° to the laser axis and normalized to the focused laser energy (30% of energy in FWHM of the focal spot) are presented for the PHELIX case (this work) along with the results from Shou et al obtained at the Center for Relativistic Laser Science (CoReLS) in Korea. There, targets made of carbon nanotube foam (CNF) were irradiated with 20 fs, ~10 21 W/cm 2 laser pulses and high ns contrast [50]. Two orders of magnitude higher laser intensity resulted in a much higher total number of X-ray photons compared to PHELIX, but with a betatron divergence of a few steradians predicted by PIC simulations (private communications, Shou et al).…”

Section: B Measurement Of the Betatron Radiationmentioning

confidence: 99%

High-brightness betatron emission from the interaction of a sub picosecond laser pulse with pre-ionized low-density polymer foam for ICF research

Gyrdymov,

Cikhardt,

Tavana

et al. 2024

Preprint

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Direct laser acceleration (DLA) of electrons in plasmas of near-critical density (NCD) is a very advancing platform for high-energy PW-class lasers of moderate relativistic intensity supporting Inertial Confinement Fusion research. Experiments conducted at the PHELIX sub-PW Nd:glass laser demonstrated application-promising characteristics of DLA-based radiation and particle sources, such as ultra-high number, high directionality and high conversion efficiency. In this context, the bright synchrotron-like (betatron) radiation of DLA electrons, which arises from the interaction of a sub-ps PHELIX laser pulse with an intensity of 1019 W/cm2 with pre-ionized low-density polymer foam, was studied. The experimental results show that the betatron radiation produced by DLA electrons in NCD plasma is well directed with a half-angle of 100-200 mrad, yielding (3.4 ± 0.4)·1010 photons/keV/sr at 10 keV photon energy. The photon fluence in the energy range of 10–30 keV reaches (2.2 ± 0.3)·1011 photons/sr and the brilliance at 10 keV approaches ~2·1020 photons/s/mm2/mrad2/(0.1% BW), which agrees well with the particle-in-cell simulations. These results pave the way for innovative applications of the DLA regime using low-density pre-ionized foams in high-energy density research.

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“…in the past two decades 2 – 6 The Ti:sapphire crystal as a broadband laser material can support a high-energy short pulse of 20 to 50 fs, which is much shorter than others, such as neodymium-doped glass (Nd:glass). Thanks to the broadband gain bandwidth and, accordingly, short pulses of the Ti:sapphire crystal, Japan developed the first fs-PW Ti:sapphire ultraintense laser in 2003, 7 Korea completed a 4.2 PW Ti:sapphire ultraintense laser in 2017, 8 and China and Europe accomplished two 10 PW (around 22 fs and 220 J) Ti:sapphire ultraintense lasers [i.e., Shanghai Super-intense Ultrafast Laser Facility (SULF) and Extreme Light Infrastructure – Nuclear Physics (ELI-NP)] in 2018 and 2020, respectively 9 , 10 .…”

Section: Introductionmentioning

confidence: 99%

Coherently tiled Ti:sapphire laser amplification: a way to break the 10 petawatt limit on current ultraintense lasers

Liu,

et al. 2023

Adv. Photon. Nexus

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After reaching a world record of 10 PW, the peak power development of the titanium-sapphire (Ti:sapphire) PW ultraintense lasers has hit a bottleneck, and it seems to be difficult to continue increasing due to the difficulty of manufacturing larger Ti:sapphire crystals and the limitation of parasitic lasing that can consume stored pump energy. Unlike coherent beam combining, coherent Ti:sapphire tiling is a viable solution for expanding Ti:sapphire crystal sizes, truncating transverse amplified spontaneous emission, suppressing parasitic lasing, and, importantly, not requiring complex space-time tiling control. A theoretical analysis of the above features and an experimental demonstration of high-quality laser amplification are reported. The results show that the addition of a 2 × 2 tiled Ti:sapphire amplifier to today's 10 PW ultraintense laser is a viable technique to break the 10 PW limit and directly increase the highest peak power recorded by a factor of 4, further approaching the exawatt class.

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Brilliant femtosecond-laser-driven hard X-ray flashes from carbon nanotube plasma

Cited by 30 publications

References 32 publications

Numerical investigation of non-linear inverse Compton scattering in double-layer targets

Numerical investigation of non-linear inverse Compton scattering in double-layer targets

High-brightness betatron emission from the interaction of a sub picosecond laser pulse with pre-ionized low-density polymer foam for ICF research

Coherently tiled Ti:sapphire laser amplification: a way to break the 10 petawatt limit on current ultraintense lasers

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