Relativistic frequency upshift to the extreme ultraviolet regime using self-induced oscillatory flying mirrors

Kim, I Jong; Pae, Ki Hong; Kim, Chul Min; Kim, Hyung Taek; Yun, Hyeok; Yun, Sang Jae; Sung, Jae Hee; Lee, Seong Ku; Yoon, Jun‐Bo; Yu, Tae Jun; Jeong, Tae Moon; Nam, Chang Hee; Lee, Jongmin

doi:10.1038/ncomms2245

Cited by 26 publications

(9 citation statements)

References 26 publications

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“…Two-and three-dimensional particle-in-cell simulations were carried out using the fully relativistic electromagnetic code ALPS. ALPS code has already been successfully used to simulate laser driven electron [25] and proton accelerations [26] as well as to study relativistic harmonics generation via oscillatory flying mirrors [27]. The targets are modeled by cold plasmas composed of multi-species ions (C 6+ ions and protons with number density ratio of n C : n H 1:1.5) and electrons with realistic solid density.…”

Section: Methodsmentioning

confidence: 99%

Radiation pressure acceleration of protons to 93 MeV with circularly polarized petawatt laser pulses

et al. 2016

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Particle acceleration using ultraintense, ultrashort laser pulses is one of the most attractive topics in relativistic laser-plasma research. We report proton/ion acceleration in the intensity range of 5×10 19 W/cm 2 to 3.3×10 20 W/cm 2 by irradiating linearly polarized, 30-fs, 1-PW laser pulses on 10-to 100-nm-thick polymer targets. The proton energy scaling with respect to the intensity and target thickness was examined. The experiments demonstrated, for the first time with linearly polarized light, a transition from the target normal sheath acceleration to radiation pressure acceleration and showed a maximum proton energy of 45 MeV when a 10-nm-thick target was irradiated by a laser intensity of 3.3×10 20 W/cm 2. The experimental results were further supported by two-and three-dimensional particle-in-cell simulations. Based on the deduced proton energy scaling, proton beams having an energy of ~ 200 MeV should be feasible at a laser intensity of 1.5×10 21 W/cm 2 .

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Section: Methodsmentioning

confidence: 99%

Radiation pressure acceleration of protons to 93 MeV with circularly polarized petawatt laser pulses

et al. 2016

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“…The motion of the plasma surface during the interaction (denting) influences the harmonic beam divergence 31 and reduces the coherence length of ROM harmonics 32 . The generation condition is controlled by the plasma scale length to optimize the harmonic yield 33 – 36 and to change the spacing between pulses in an attosecond pulse train (attotrain) 37 . Furthermore, utilizing similar control, harmonics provide spatial information about structured plasma surfaces via ptychographic imaging 38 .…”

Section: Introductionmentioning

confidence: 99%

Spectral interferometry with waveform-dependent relativistic high-order harmonics from plasma surfaces

Kormin

Borot

et al. 2018

Nat Commun

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The interaction of ultra-intense laser pulses with matter opened the way to generate the shortest light pulses available nowadays in the attosecond regime. Ionized solid surfaces, also called plasma mirrors, are promising tools to enhance the potential of attosecond sources in terms of photon energy, photon number and duration especially at relativistic laser intensities. Although the production of isolated attosecond pulses and the understanding of the underlying interactions represent a fundamental step towards the realization of such sources, these are challenging and have not yet been demonstrated. Here, we present laser-waveform-dependent high-order harmonic radiation in the extreme ultraviolet spectral range supporting well-isolated attosecond pulses, and utilize spectral interferometry to understand its relativistic generation mechanism. This unique interpretation of the measured spectra provides access to unrevealed temporal and spatial properties such as spectral phase difference between attosecond pulses and field-driven plasma surface motion during the process.

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“…Highenergy photon can be used for research pertaining to ultrafast electron dynamics in atoms, molecules, plasmas, and solids. In the laser-plasma accelerator, many processes producing energetic photon sources, such as high harmonic generation [26], undulator radiation [27], betatron radiation [28], and Compton scattering [29], were proposed and some of them have been experimentally demonstrated. So far, basic applications for high-intensity laser pulses were described.…”

Section: Interaction Of An Intense Laser Pulse With Plasmamentioning

confidence: 99%

Generation of High-Intensity Laser Pulses and their Applications

Jeong¹,

Lee²

2016

High Energy and Short Pulse Lasers

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The progress in the laser technology makes it possible to produce a laser pulse having a peak power of over PW. Focusing such high-power laser pulses enables ones to have unprecedentedly strong laser intensity. The laser intensity over 10 19 W/cm 2 , which is called the relativistic laser intensity, can accelerate electrons almost to the speed of light. The acceleration of charged particles using such a high-power laser pulse has been successfully demonstrated in many experiments. According to the recent calculation using the vector diffraction theory, it is possible, by employing a tight focusing geometry, to produce a femtosecond (fs) laser focal spot to have an intensity of over 10 24 W/cm 2 in the focal plane. Over this laser intensity, protons can be directly accelerated almost to the speed of light. Such ultrashort and ultrastrong laser intensities will bring ones many opportunities to experimentally study ultrafast physical phenomena we have never met before. This chapter describes how to generate a high-power laser pulse. And, then the focusing characteristics of a femtosecond high-power laser pulse are discussed in the scalar and the vector diffraction limits. Finally, the applications of ultrashort high-power laser are briefly introduced.

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Relativistic frequency upshift to the extreme ultraviolet regime using self-induced oscillatory flying mirrors

Cited by 26 publications

References 26 publications

Radiation pressure acceleration of protons to 93 MeV with circularly polarized petawatt laser pulses

Radiation pressure acceleration of protons to 93 MeV with circularly polarized petawatt laser pulses

Spectral interferometry with waveform-dependent relativistic high-order harmonics from plasma surfaces

Generation of High-Intensity Laser Pulses and their Applications

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