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A New Line for Laser-Driven Light Ions Acceleration and Related TNSA Studies. APPLIED SCIENCES-BASEL 2017. [DOI: 10.3390/app7100984] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ma G, Yu W, Yu MY, Shen B, Veisz L. Intense circularly polarized attosecond pulse generation from relativistic laser plasmas using few-cycle laser pulses. OPTICS EXPRESS 2016; 24:10057-10065. [PMID: 27137616 DOI: 10.1364/oe.24.010057] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We have investigated the polarization of attosecond light pulses generated from relativistic few-cycle laser pulse interaction with the surface of overdense plasmas using particle-in-cell simulation. Under suitable conditions, a desired polarization state of the generated attosecond pulse can be achieved by controlling the polarization of the incident laser. In particular, an elliptically polarized laser pulse of suitable ellipticity can generate an almost circularly polarized attosecond pulse without compromising the harmonic generation efficiency. The process is thus applicable as a new tabletop circularly-polarized XUV radiation source for probing attosecond phenomena with high temporal resolution.
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3
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Li C, Liao GQ, Zhou ML, Du F, Ma JL, Li YT, Wang WM, Sheng ZM, Chen LM, Zhang J. Backward terahertz radiation from intense laser-solid interactions. OPTICS EXPRESS 2016; 24:4010-4021. [PMID: 26907053 DOI: 10.1364/oe.24.004010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report a systematic study on backward terahertz (THz) radiation generation from laser-solid interactions by changing a variety of laser/plasma parameters. We demonstrate a high-energy (with an energy flux density reaching 80 μJ/sr), broadband (>10 THz) plasma-based radiation source. The radiation energy is mainly distributed either in the >10 THz or <3 THz regions. A radial surface current formed by the lateral transport of low-energy electrons (LEE) is believed to be responsible for the radiation in the high-THz region (>10 THz), while high-energy surface fast electrons (SFE) accelerated along the target surface mainly contribute to lower frequency (<3 THz) radiation. The unifying explanation could be applied to backward THz radiation generation from solid targets with presence of relative small preplasmas.
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Li C, Cui YQ, Zhou ML, Du F, Li YT, Wang WM, Chen LM, Sheng ZM, Ma JL, Lu X, Zhang J. Role of resonance absorption in terahertz radiation generation from solid targets. OPTICS EXPRESS 2014; 22:11797-11803. [PMID: 24921301 DOI: 10.1364/oe.22.011797] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The interaction of 100-fs laser pulses with solid targets at laser intensities 10(16)-10(18)W/cm(2) has been investigated experimentally by simultaneous measurements of terahertz (THz) and second harmonic signals. THz yield at the front side of the target, which rises from the self-organized transient electron currents along the target surface, is found scaling linearly with the laser intensity basically. Measurements of specularly reflected light spectrum show clear evidence of resonance absorption. The positive effects of resonance absorption on surface current and THz radiation generation have been confirmed by two-dimensional (2D) particle-in-cell (PIC) simulations and angular-dependent experiments, respectively.
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Higginbotham A, Patel S, Hawreliak JA, Ciricosta O, Collins GW, Coppari F, Eggert JH, Suggit MJ, Tang H, Wark JS. Single photon energy dispersive x-ray diffraction. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:033906. [PMID: 24689599 DOI: 10.1063/1.4867456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
With the pressure range accessible to laser driven compression experiments on solid material rising rapidly, new challenges in the diagnosis of samples in harsh laser environments are emerging. When driving to TPa pressures (conditions highly relevant to planetary interiors), traditional x-ray diffraction techniques are plagued by increased sources of background and noise, as well as a potential reduction in signal. In this paper we present a new diffraction diagnostic designed to record x-ray diffraction in low signal-to-noise environments. By utilising single photon counting techniques we demonstrate the ability to record diffraction patterns on nanosecond timescales, and subsequently separate, photon-by-photon, signal from background. In doing this, we mitigate many of the issues surrounding the use of high intensity lasers to drive samples to extremes of pressure, allowing for structural information to be obtained in a regime which is currently largely unexplored.
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Affiliation(s)
- Andrew Higginbotham
- Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - Shamim Patel
- Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - James A Hawreliak
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - Orlando Ciricosta
- Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - Gilbert W Collins
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - Federica Coppari
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - Jon H Eggert
- Lawrence Livermore National Laboratory, Livermore, California 94551, USA
| | - Matthew J Suggit
- Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
| | - Henry Tang
- Department of Earth and Planetary Science, University of California Berkeley, Berkeley, California 94720, USA
| | - Justin S Wark
- Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
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Laser-Plasma Acceleration with FLAME and ILIL Ultraintense Lasers. APPLIED SCIENCES-BASEL 2013. [DOI: 10.3390/app3030559] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Labate L, Köster P, Levato T, Gizzi LA. A novel technique for single-shot energy-resolved 2D x-ray imaging of plasmas relevant for the inertial confinement fusion. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:103504. [PMID: 23126763 DOI: 10.1063/1.4759135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
A novel x-ray diagnostic of laser-fusion plasmas is described, allowing 2D monochromatic images of hot, dense plasmas to be obtained in any x-ray photon energy range, over a large domain, on a single-shot basis. The device (named energy-encoded pinhole camera) is based upon the use of an array of many pinholes coupled to a large area CCD camera operating in the single-photon mode. The available x-ray spectral domain is only limited by the quantum efficiency of scientific-grade x-ray CCD cameras, thus extending from a few keV up to a few tens of keV. Spectral 2D images of the emitting plasma can be obtained at any x-ray photon energy provided that a sufficient number of photons had been collected at the desired energy. Results from recent inertial confinement fusion related experiments will be reported in order to detail the new diagnostic.
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Affiliation(s)
- L Labate
- Intense Laser Irradiation Laboratory, Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, Pisa, Italy.
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Li C, Zhou ML, Ding WJ, Du F, Liu F, Li YT, Wang WM, Sheng ZM, Ma JL, Chen LM, Lu X, Dong QL, Wang ZH, Lou Z, Shi SC, Wei ZY, Zhang J. Effects of laser-plasma interactions on terahertz radiation from solid targets irradiated by ultrashort intense laser pulses. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2011; 84:036405. [PMID: 22060511 DOI: 10.1103/physreve.84.036405] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 05/16/2011] [Indexed: 05/31/2023]
Abstract
Interactions of 100-fs laser pulses with solid targets at intensities of 10(18) W/cm(2) and resultant terahertz (THz) radiation are studied under different laser contrast ratio conditions. THz emission is measured in the specular reflection direction, which appears to decrease as the laser contrast ratio varies from 10(-8) to 10(-6). Correspondingly, the frequency spectra of the reflected light are observed changing from second harmonic dominant, three-halves harmonic dominant, to vanishing of both harmonics. Two-dimensional particle-in-cell simulation also suggests that this observation is correlated with the plasma density scale length change. The results demonstrate that the THz emission is closely related to the laser-plasma interaction processes. The emission is strong when resonance absorption is a key feature of the interaction, and becomes much weaker when parametric instabilities dominate.
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Affiliation(s)
- Chun Li
- Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China
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Zamponi F, Lübcke A, Kämpfer T, Uschmann I, Förster E, Robinson APL, Giulietti A, Köster P, Labate L, Levato T, Gizzi LA. Directional bremsstrahlung from a Ti laser-produced x-ray source at relativistic intensities in the 3-12 keV range. PHYSICAL REVIEW LETTERS 2010; 105:085001. [PMID: 20868103 DOI: 10.1103/physrevlett.105.085001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2008] [Revised: 05/12/2010] [Indexed: 05/29/2023]
Abstract
Front and rear side x-ray emission from thin titanium foils irradiated by ultraintense laser pulses at intensities up to ≈5 × 10(19) W/cm2 was measured using a high-resolution imaging system. Significant differences in intensity, dimension, and spectrum between front and rear side emission intensity in the 3-12 keV photon energy range was found even for 5 μm thin Ti foils. Simulations and analysis of space-resolved spectra explain this behavior in terms of directional bremsstrahlung emission from fast electrons generated during the interaction process.
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Affiliation(s)
- F Zamponi
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany.
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Labate L, Giulietti A, Giulietti D, Köster P, Levato T, Gizzi LA, Zamponi F, Lübcke A, Kämpfer T, Uschmann I, Förster E. Novel x-ray multispectral imaging of ultraintense laser plasmas by a single-photon charge coupled device based pinhole camera. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2007; 78:103506. [PMID: 17979418 DOI: 10.1063/1.2800774] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Spectrally resolved two-dimensional imaging of ultrashort laser-produced plasmas is described, obtained by means of an advanced technique. The technique has been tested with microplasmas produced by ultrashort relativistic laser pulses. The technique is based on the use of a pinhole camera equipped with a charge coupled device detector operating in the single-photon regime. The spectral resolution is about 150 eV in the 4-10 keV range, and images in any selected photon energy range have a spatial resolution of 5 microm. The potential of the technique to study fast electron propagation in ultraintense laser interaction with multilayer targets is discussed and some preliminary results are shown.
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Affiliation(s)
- L Labate
- Intense Laser Irradiation Laboratory, IPCF, Consiglio Nazionale delle Ricerche, Via Moruzzi 1, 56124 Pisa, Italy.
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Sandhu AS, Kumar GR, Sengupta S, Das A, Kaw PK. Laser-pulse-induced second-harmonic and hard x-ray emission: role of plasma-wave breaking. PHYSICAL REVIEW LETTERS 2005; 95:025005. [PMID: 16090694 DOI: 10.1103/physrevlett.95.025005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2004] [Indexed: 05/03/2023]
Abstract
We report time resolved measurements of second-harmonic and hard x rays emitted during the interaction of an intense laser pulse (10(16) W cm(-2), 100 fs) with a preplasma generated on a solid target. We observe that for a particular length scale the second harmonic goes through a minimum, while hard x-ray emission on the contrary maximizes. Theoretical or numerical modeling of this anticorrelation in terms of wave breaking of strongly driven electron plasma waves clearly brings out hitherto unexplored links between the physical mechanisms of second-harmonic generation and hard x-ray emission.
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Affiliation(s)
- A S Sandhu
- Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai 400 005, India. arvinder@
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Ganeev RA, Kanai T, Ishizawa A, Ozaki T, Kuroda H. Development and applications of a compact hybrid tabletop terawatt chirped-pulse amplification Ti:sapphire-Nd:glass laser for x-ray lasing and harmonic generation. APPLIED OPTICS 2004; 43:1396-1403. [PMID: 15008546 DOI: 10.1364/ao.43.001396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A hybrid tabletop (2 m x 3 m) terawatt chirped-pulse amplification Ti:sapphire-Nd:glass laser (1054 nm, 475 fs, 500 mJ, 9 x 10(17) W cm(-2)) has been developed for laser-matter experiments. An overall gain factor of 10(10) was achieved for the laser. The results of laser applications in the studies of soft-x-ray Ni-like Mo 18.9-nm lasing and of harmonic generation from solid surfaces are presented.
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Affiliation(s)
- Rashid A Ganeev
- Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan.
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Pretzler G, Schlegel T, Fill E, Eder D. Hot-electron generation in copper and photopumping of cobalt. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 2000; 62:5618-5623. [PMID: 11089120 DOI: 10.1103/physreve.62.5618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2000] [Indexed: 05/23/2023]
Abstract
Hot electrons generated upon interaction of p-polarized 130 fs laser pulses with copper and penetrating into the target material are characterized with respect to their energy distribution and directionality. "Experimental" data are obtained by comparing the rear-side x-ray emission from layered targets with Monte Carlo electron-photon transport simulations. Theoretical electron energy distributions are derived by means of a one and a half-dimensional particle-in-cell code. Both sets of data consist of a two-temperature distribution of electrons propagating in a direction almost perpendicular to the target surface. The "experimental" data contain a considerably higher population of the lower temperature electrons. The discrepancy is explained by the intensity distribution of the laser spot. The results are used to design an experiment for demonstrating photopumping of cobalt with copper Kalpha radiation. A 10 &mgr;m copper foil is backed with 1 mm of polyethylene (PE) followed by 10 &mgr;m of cobalt, the rear-side Kalpha emission of which is measured. The PE layer prevents fast electrons from reaching the cobalt. Comparing the cobalt Kalpha emission with that of nickel, which is not photopumped by copper Kalpha shows enhancement by almost a factor of 2.
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Affiliation(s)
- G Pretzler
- Max-Planck-Institut fur Quantenoptik, D-85748 Garching, Germany
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15
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Reich C, Gibbon P, Uschmann I, Forster E. Yield optimization and time structure of femtosecond laser plasma kalpha sources. PHYSICAL REVIEW LETTERS 2000; 84:4846-4849. [PMID: 10990813 DOI: 10.1103/physrevlett.84.4846] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/1999] [Revised: 02/23/2000] [Indexed: 05/23/2023]
Abstract
The generation of femtosecond Kalpha x rays from laser-irradiated plasmas is studied with a view to optimizing photon number and pulse duration. Using analytical and numerical models of hot electron generation and subsequent transport in a range of materials, it is shown that an optimum laser intensity I(opt) = 7x10(9)Z4.4 exists for maximum Kalpha yield. Furthermore, it is demonstrated that bulk targets are unsuitable for generating sub-ps x-ray pulses: instead, design criteria are proposed for achieving Kalpha pulse durations </=100 fs using foils of approximately 2 &mgr;m thickness.
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Affiliation(s)
- C Reich
- Abteilung Rontgenoptik, Institut fur Optik und Quantenelektronik, Friedrich-Schiller-Universitat Jena, Max-Wien-Platz 1, D-07743 Jena, Germany
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Schnurer M, Nolte R, Rousse A, Grillon G, Cheriaux G, Kalachnikov MP, Nickles PV, Sandner W. Dosimetric measurements of electron and photon yields from solid targets irradiated with 30 fs pulses from a 14 TW laser. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 2000; 61:4394-4401. [PMID: 11088237 DOI: 10.1103/physreve.61.4394] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/1999] [Indexed: 05/23/2023]
Abstract
A 14 TW Ti:Sa laser furnishing pulses with a duration of 30 fs (full width at half maximum) at a repetition rate of 10 Hz was used to expose solid targets to intensities of up to 3x10(18) W/cm(2). Dosimetric techniques were employed to study the total x-ray yield, the spectral and angular distribution of the x-ray photons and the energy distribution of high-energy electrons injected into the solid target and emitted into the vacuum. Scans of laser pulse energy and duration were carried out to study the dependence of the x-ray generation efficiency on these parameters. The radiation transport processes in the target were modeled using the Monte Carlo method. The results of these calculations were used to interpret the measurement results and to critically discuss the applicability of dosimetric methods to the investigation of photon and electron emission from laser-produced plasmas.
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Affiliation(s)
- M Schnurer
- Photonics Institute, Vienna University of Technology, Gusshausstrasse 27/359, A-1040 Vienna, Austria
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Borghesi M, Mackinnon AJ, Gaillard R, Willi O, Riley D. Absorption of subpicosecond UV laser pulses during interaction with solid targets. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1999; 60:7374-81. [PMID: 11970684 DOI: 10.1103/physreve.60.7374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/1999] [Revised: 07/06/1999] [Indexed: 04/18/2023]
Abstract
The absorption of subpicosecond uv laser pulses has been measured at intensities above 10(17) W/cm(2). High levels of absorption were observed, up to 55% for s polarization and 65% for p polarization. The behavior with angle of incidence and polarization can be interpreted as due to a combination of resonance and collisional absorption, taking place in a plasma with a scale length of the order of a fraction of the laser wavelength.
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Affiliation(s)
- M Borghesi
- The Blackett Laboratory, Imperial College of Science, Medicine and Technology, London SW7 2BZ, United Kingdom
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