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Sarri G, Schumaker W, Di Piazza A, Vargas M, Dromey B, Dieckmann ME, Chvykov V, Maksimchuk A, Yanovsky V, He ZH, Hou BX, Nees JA, Thomas AGR, Keitel CH, Zepf M, Krushelnick K. Sarri et al. Reply. Phys Rev Lett 2020; 124:179502. [PMID: 32412293 DOI: 10.1103/physrevlett.124.179502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 04/08/2020] [Indexed: 06/11/2023]
Affiliation(s)
- G Sarri
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
| | - W Schumaker
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - A Di Piazza
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - M Vargas
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - B Dromey
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
| | - M E Dieckmann
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
| | - V Chvykov
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - A Maksimchuk
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - V Yanovsky
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - Z H He
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - B X Hou
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - J A Nees
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - A G R Thomas
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
| | - C H Keitel
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - M Zepf
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
- Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
| | - K Krushelnick
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
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2
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Nagymihaly RS, Cao H, Papp D, Hajas G, Kalashnikov M, Osvay K, Chvykov V. Liquid-cooled Ti:Sapphire thin disk amplifiers for high average power 100-TW systems. Opt Express 2017; 25:6664-6677. [PMID: 28381011 DOI: 10.1364/oe.25.006664] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, numerical heat transfer simulations of direct water-cooled gain modules for thin disk (TD) Ti:Sapphire (Ti:Sa) power amplifiers are presented. By using the TD technique in combination with the extraction during pumping (EDP) method 100-TW class amplifiers operating around 300 W average power could be reached in the future. Single and double-sided cooling arrangements were investigated for several coolant flow velocities. Simulations which upscale the gain module for multiple kilowatts of average power were also performed for large aperture Ti:Sa disks and for multiple disks with several coolant channels.
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3
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Zhao TZ, Behm K, Dong CF, Davoine X, Kalmykov SY, Petrov V, Chvykov V, Cummings P, Hou B, Maksimchuk A, Nees JA, Yanovsky V, Thomas AGR, Krushelnick K. High-Flux Femtosecond X-Ray Emission from Controlled Generation of Annular Electron Beams in a Laser Wakefield Accelerator. Phys Rev Lett 2016; 117:094801. [PMID: 27610860 DOI: 10.1103/physrevlett.117.094801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Indexed: 06/06/2023]
Abstract
Annular quasimonoenergetic electron beams with a mean energy in the range 200-400 MeV and charge on the order of several picocoulombs were generated in a laser wakefield accelerator and subsequently accelerated using a plasma afterburner in a two-stage gas cell. Generation of these beams is associated with injection occurring on the density down ramp between the stages. This well-localized injection produces a bunch of electrons performing coherent betatron oscillations in the wakefield, resulting in a significant increase in the x-ray yield. Annular electron distributions are detected in 40% of shots under optimal conditions. Simultaneous control of the pulse duration and frequency chirp enables optimization of both the energy and the energy spread of the annular beam and boosts the radiant energy per unit charge by almost an order of magnitude. These well-defined annular distributions of electrons are a promising source of high-brightness laser plasma-based x rays.
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Affiliation(s)
- T Z Zhao
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
- Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - K Behm
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
- Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - C F Dong
- Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey, USA
| | - X Davoine
- CEA DAM DIF, Bruyères-le-Châtel, 91297 Arpajon, France
| | - S Y Kalmykov
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588-0299, USA
| | - V Petrov
- Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - V Chvykov
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - P Cummings
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
- Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - B Hou
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - A Maksimchuk
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - J A Nees
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - V Yanovsky
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - A G R Thomas
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
- Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - K Krushelnick
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
- Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
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4
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Sarri G, Schumaker W, Di Piazza A, Vargas M, Dromey B, Dieckmann ME, Chvykov V, Maksimchuk A, Yanovsky V, He ZH, Hou BX, Nees JA, Thomas AGR, Keitel CH, Zepf M, Krushelnick K. Table-top laser-based source of femtosecond, collimated, ultrarelativistic positron beams. Phys Rev Lett 2013; 110:255002. [PMID: 23829742 DOI: 10.1103/physrevlett.110.255002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Indexed: 06/02/2023]
Abstract
The generation of ultrarelativistic positron beams with short duration (τ(e+) ≃ 30 fs), small divergence (θ(e+) ≃ 3 mrad), and high density (n(e+) ≃ 10(14)-10(15) cm(-3)) from a fully optical setup is reported. The detected positron beam propagates with a high-density electron beam and γ rays of similar spectral shape and peak energy, thus closely resembling the structure of an astrophysical leptonic jet. It is envisaged that this experimental evidence, besides the intrinsic relevance to laser-driven particle acceleration, may open the pathway for the small-scale study of astrophysical leptonic jets in the laboratory.
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Affiliation(s)
- G Sarri
- School of Mathematics and Physics, The Queen's University of Belfast, BT7 1NN Belfast, United Kingdom
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Dollar F, Cummings P, Chvykov V, Willingale L, Vargas M, Yanovsky V, Zulick C, Maksimchuk A, Thomas AGR, Krushelnick K. Scaling high-order harmonic generation from laser-solid interactions to ultrahigh intensity. Phys Rev Lett 2013; 110:175002. [PMID: 23679739 DOI: 10.1103/physrevlett.110.175002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Indexed: 06/02/2023]
Abstract
Coherent x-ray beams with a subfemtosecond (<10(-15) s) pulse duration will enable measurements of fundamental atomic processes in a completely new regime. High-order harmonic generation (HOHG) using short pulse (<100 fs) infrared lasers focused to intensities surpassing 10(18) W cm(-2) onto a solid density plasma is a promising means of generating such short pulses. Critical to the relativistic oscillating mirror mechanism is the steepness of the plasma density gradient at the reflection point, characterized by a scale length, which can strongly influence the harmonic generation mechanism. It is shown that for intensities in excess of 10(21) W cm(-2) an optimum density ramp scale length exists that balances an increase in efficiency with a growth of parametric plasma wave instabilities. We show that for these higher intensities the optimal scale length is c/ω0, for which a variety of HOHG properties are optimized, including total conversion efficiency, HOHG divergence, and their power law scaling. Particle-in-cell simulations show striking evidence of the HOHG loss mechanism through parametric instabilities and relativistic self-phase modulation, which affect the produced spectra and conversion efficiency.
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Affiliation(s)
- F Dollar
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
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Dollar F, Zulick C, Thomas AGR, Chvykov V, Davis J, Kalinchenko G, Matsuoka T, McGuffey C, Petrov GM, Willingale L, Yanovsky V, Maksimchuk A, Krushelnick K. Finite spot effects on radiation pressure acceleration from intense high-contrast laser interactions with thin targets. Phys Rev Lett 2012; 108:175005. [PMID: 22680876 DOI: 10.1103/physrevlett.108.175005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2012] [Indexed: 06/01/2023]
Abstract
Short pulse laser interactions at intensities of 2×10(21) W cm(-2) with ultrahigh contrast (10(-15)) on submicrometer silicon nitride foils were studied experimentally by using linear and circular polarizations at normal incidence. It was observed that, as the target decreases in thickness, electron heating by the laser begins to occur for circular polarization leading to target normal sheath acceleration of contaminant ions, while at thicker targets no acceleration or electron heating is observed. For linear polarization, all targets showed exponential energy spreads with similar electron temperatures. Particle-in-cell simulations demonstrate that the heating is due to the rapid deformation of the target that occurs early in the interaction. These experiments demonstrate that finite spot size effects can severely restrict the regime suitable for radiation pressure acceleration.
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Affiliation(s)
- F Dollar
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA
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Dollar F, Matsuoka T, Petrov GM, Thomas AGR, Bulanov SS, Chvykov V, Davis J, Kalinchenko G, McGuffey C, Willingale L, Yanovsky V, Maksimchuk A, Krushelnick K. Control of energy spread and dark current in proton and ion beams generated in high-contrast laser solid interactions. Phys Rev Lett 2011; 107:065003. [PMID: 21902332 DOI: 10.1103/physrevlett.107.065003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Indexed: 05/31/2023]
Abstract
By using temporal pulse shaping of high-contrast, short pulse laser interactions with solid density targets at intensities of 2 × 10(21) W cm(-2) at a 45° incident angle, we show that it is possible to reproducibly generate quasimonoenergetic proton and ion energy spectra. The presence of a short pulse prepulse 33 ps prior to the main pulse produced proton spectra with an energy spread between 25% and 60% (ΔE/E) with energy of several MeV, with light ions becoming quasimonoenergetic for 50 nm targets. When the prepulse was removed, the energy spectra was broad. Numerical simulations suggest that expansion of the rear-side contaminant layer allowed for density conditions that prevented the protons from being screened from the sheath field, thus providing a low energy cutoff in the observed spectra normal to the target surface.
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Affiliation(s)
- F Dollar
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, 48109, USA
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Huntington CM, Thomas AGR, McGuffey C, Matsuoka T, Chvykov V, Kalintchenko G, Kneip S, Najmudin Z, Palmer C, Yanovsky V, Maksimchuk A, Drake RP, Katsouleas T, Krushelnick K. Current filamentation instability in laser wakefield accelerators. Phys Rev Lett 2011; 106:105001. [PMID: 21469796 DOI: 10.1103/physrevlett.106.105001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Indexed: 05/30/2023]
Abstract
Experiments using an electron beam produced by laser-wakefield acceleration have shown that varying the overall beam-plasma interaction length results in current filamentation at lengths that exceed the laser depletion length in the plasma. Three-dimensional simulations show this to be a combination of hosing, beam erosion, and filamentation of the decelerated beam. This work suggests the ability to perform scaled experiments of astrophysical instabilities. Additionally, understanding the processes involved with electron beam propagation is essential to the development of wakefield accelerator applications.
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Affiliation(s)
- C M Huntington
- Atmospheric, Oceanic and Space Science, University of Michigan, Ann Arbor, Michigan 48103, USA.
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Matsuoka T, McGuffey C, Cummings PG, Horovitz Y, Dollar F, Chvykov V, Kalintchenko G, Rousseau P, Yanovsky V, Bulanov SS, Thomas AGR, Maksimchuk A, Krushelnick K. Stimulated Raman side scattering in laser wakefield acceleration. Phys Rev Lett 2010; 105:034801. [PMID: 20867770 DOI: 10.1103/physrevlett.105.034801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Indexed: 05/29/2023]
Abstract
Stimulated Raman side scattering of an ultrashort high power laser pulse is studied in experiments on laser wakefield acceleration. Experiments and simulations reveal that stimulated Raman side scattering occurs at the beginning of the interaction, that it contributes to the evolution of the pulse prior to wakefield formation, and also that it affects the quality of electron beams generated. The relativistic shift of the plasma frequency is measured.
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Affiliation(s)
- T Matsuoka
- Center for Ultrafast Optical Science and FOCUS Center, University of Michigan, Ann Arbor, Michigan 48109 USA
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10
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Litzenberg D, Dollar F, Bulanov S, Brantov A, Bychenkov V, Chvykov V, Kalintchenko G, Matsuoka T, McGuffey C, Yanovsky V, Krushelnick K, Maksimchuk A. SU-GG-T-462: Observation of Quasi-Monoenergetic Laser Accelerated Proton and Carbon Beams. Med Phys 2010. [DOI: 10.1118/1.3468860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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11
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Dong P, Reed SA, Yi SA, Kalmykov S, Shvets G, Downer MC, Matlis NH, Leemans WP, McGuffey C, Bulanov SS, Chvykov V, Kalintchenko G, Krushelnick K, Maksimchuk A, Matsuoka T, Thomas AGR, Yanovsky V. Formation of optical bullets in laser-driven plasma bubble accelerators. Phys Rev Lett 2010; 104:134801. [PMID: 20481887 DOI: 10.1103/physrevlett.104.134801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Indexed: 05/29/2023]
Abstract
Electron density bubbles--wake structures generated in plasma of density n(e) approximately 10(19) cm(-3) by the light pressure of intense ultrashort laser pulses--are shown to reshape weak copropagating probe pulses into optical "bullets." The bullets are reconstructed using frequency-domain interferometric techniques in order to visualize bubble formation. Bullets are confined in three dimensions to plasma-wavelength size, and exhibit higher intensity, broader spectrum and flatter temporal phase than surrounding probe light, evidence of their compression by the bubble. Bullets observed at 0.8 approximately < n(e) approximately < 1.2x10(19) cm(-3) provide the first observation of bubble formation below the electron capture threshold. At higher n(e), bullets appear with high shot-to-shot stability together with relativistic electrons that vary widely in spectrum, and help relate bubble formation to fast electron generation.
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Affiliation(s)
- Peng Dong
- Department of Physics, University of Texas at Austin, Austin, Texas 78712-1081, USA
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12
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McGuffey C, Thomas AGR, Schumaker W, Matsuoka T, Chvykov V, Dollar FJ, Kalintchenko G, Yanovsky V, Maksimchuk A, Krushelnick K, Bychenkov VY, Glazyrin IV, Karpeev AV. Ionization induced trapping in a laser wakefield accelerator. Phys Rev Lett 2010; 104:025004. [PMID: 20366605 DOI: 10.1103/physrevlett.104.025004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2009] [Indexed: 05/29/2023]
Abstract
Experimental studies of electrons produced in a laser wakefield accelerator indicate trapping initiated by ionization of target gas atoms. Targets composed of helium and controlled amounts of various gases were found to increase the beam charge by as much as an order of magnitude compared to pure helium at the same electron density and decrease the beam divergence from 5.1+/-1.0 to 2.9+/-0.8 mrad. The measurements are supported by particle-in-cell modeling including ionization. This mechanism should allow generation of electron beams with lower emittance and higher charge than in preionized gas.
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Affiliation(s)
- C McGuffey
- Center for Ultrafast Optical Science, The University of Michigan, Ann Arbor, Michigan 48109, USA
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13
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Litzenberg D, Bulanov SS, Chvykov V, Brantov A, Bychenkov V, Kalintchenko G, Matsuoka T, Dollar F, Rousseau P, Reed S, Yanovsky V, Krushelnick K, Maksimchuk A. MO-EE-A2-05: Experimental Implementation of the Directed Coulomb Explosion Regime of Laser-Proton Acceleration. Med Phys 2009. [DOI: 10.1118/1.3182257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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14
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Bulanov SS, Brantov A, Bychenkov VY, Chvykov V, Kalinchenko G, Matsuoka T, Rousseau P, Reed S, Yanovsky V, Litzenberg DW, Krushelnick K, Maksimchuk A. Accelerating monoenergetic protons from ultrathin foils by flat-top laser pulses in the directed-Coulomb-explosion regime. Phys Rev E Stat Nonlin Soft Matter Phys 2008; 78:026412. [PMID: 18850951 PMCID: PMC2597209 DOI: 10.1103/physreve.78.026412] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2007] [Revised: 05/12/2008] [Indexed: 05/26/2023]
Abstract
We consider the effect of laser beam shaping on proton acceleration in the interaction of a tightly focused pulse with ultrathin double-layer solid targets in the regime of directed Coulomb explosion. In this regime, the heavy ions of the front layer are forced by the laser to expand predominantly in the direction of the pulse propagation, forming a moving longitudinal charge separation electric field, thus increasing the effectiveness of acceleration of second-layer protons. The utilization of beam shaping, namely, the use of flat-top beams, leads to more efficient proton acceleration due to the increase of the longitudinal field.
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Affiliation(s)
- S S Bulanov
- FOCUS Center and Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
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15
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Yanovsky V, Chvykov V, Kalinchenko G, Rousseau P, Planchon T, Matsuoka T, Maksimchuk A, Nees J, Cheriaux G, Mourou G, Krushelnick K. Ultra-high intensity- 300-TW laser at 0.1 Hz repetition rate. Opt Express 2008; 16:2109-14. [PMID: 18542290 DOI: 10.1364/oe.16.002109] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We demonstrate the highest intensity - 300 TW laser by developing booster amplifying stage to the 50-TW-Ti:sapphire laser (HERCULES). To our knowledge this is the first multi-100TW-scale laser at 0.1 Hz repetition rate.
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Affiliation(s)
- V Yanovsky
- FOCUS Center and Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
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16
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Maksimchuk A, Bulanov S, Chvykov V, Brantov A, Bychenkov V, Kalintchenko G, Matsuoka T, Rousseau P, Reed S, Yanovsky V, Litzenberg D. TH-C-230A-06: High-Energy Proton Acceleration Driven by Ultra-Intense Ultra-Clean Laser Pulses. Med Phys 2006. [DOI: 10.1118/1.2241869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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17
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Abstract
We demonstrate what we believe to be the highest-contrast (10(11)), multiterawatt, chirped-pulse amplification (CPA) Ti:sapphire laser by applying the modified cross-polarized-wave (XPW) generation method. This method produces a contrast improvement of 3 orders of magnitude using microjoule input energy. Microjoule energy can be achieved by direct amplification without the complications of a double CPA system. The 10(11) contrast is sufficient for experiments on high-damage-threshold solid targets with focused intensities up to 10(22) W/cm(2).
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Affiliation(s)
- V Chvykov
- Center for Ultrafast Optical Sciences, University of Michigan, Ann Arbor 48109-2099, USA.
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18
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Abstract
We demonstrate what we believe to be the highest-contrast (10(11)), multiterawatt, chirped-pulse amplification (CPA) Ti:sapphire laser by applying the modified cross-polarized-wave (XPW) generation method. This method produces a contrast improvement of 3 orders of magnitude using microjoule input energy. Microjoule energy can be achieved by direct amplification without the complications of a double CPA system. The 10(11) contrast is sufficient for experiments on high-damage-threshold solid targets with focused intensities up to 10(22) W/cm(2).
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Affiliation(s)
- V Chvykov
- Center for Ultrafast Optical Sciences, University of Michigan, Ann Arbor 48109-2099, USA.
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19
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Bahk SW, Rousseau P, Planchon TA, Chvykov V, Kalintchenko G, Maksimchuk A, Mourou GA, Yanovsky V. Generation and characterization of the highest laser intensities (10(22) W/cm2). Opt Lett 2004; 29:2837-9. [PMID: 15645797 DOI: 10.1364/ol.29.002837] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We generated a record peak intensity of 0.7 x 10(22) W/cm2 by focusing a 45-TW laser beam with an f/0.6 off-axis paraboloid. The aberrations of the paraboloid and the low-energy reference laser beam were measured and corrected, and a focal spot size of 0.8 microm was achieved. It is shown that the peak intensity can be increased to 1.0 x 10(22) W/cm2 by correction of the wave front of a 45-TW beam relative to the reference beam. The phase and amplitude measurement provides for an efficient full characterization of the focal field.
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Affiliation(s)
- S W Bahk
- FOCUS Center and Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109-2099, USA.
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