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      Intense High-Energy Proton Beams from Petawatt-Laser Irradiation of Solids

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          Abstract

          An intense collimated beam of high-energy protons is emitted normal to the rear surface of thin solid targets irradiated at 1 PW power and peak intensity 3x10(20) W cm(-2). Up to 48 J ( 12%) of the laser energy is transferred to 2x10(13) protons of energy >10 MeV. The energy spectrum exhibits a sharp high-energy cutoff as high as 58 MeV on the axis of the beam which decreases in energy with increasing off axis angle. Proton induced nuclear processes have been observed and used to characterize the beam.

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          Electron, photon, and ion beams from the relativistic interaction of Petawatt laser pulses with solid targets

          Markus Roth, Curtis G. Brown, Thomas Cowan … (2000)
          Article 0 comments Cited 348 times – based on 0 reviews     Review now
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            Forward ion acceleration in thin films driven by a high-intensity laser

            Maksimchuk, Gu, Flippo … (2000)
            A collimated beam of fast protons, with energies as high as 1.5 MeV and total number of greater, similar10(9), confined in a cone angle of 40 degrees +/-10 degrees is observed when a high-intensity high-contrast subpicosecond laser pulse is focused onto a thin foil target. The protons, which appear to originate from impurities on the front side of the target, are accelerated over a region extending into the target and exit out the back side in a direction normal to the target surface. Acceleration field gradients approximately 10 GeV/cm are inferred. The maximum proton energy can be explained by the charge-separation electrostatic-field acceleration due to "vacuum heating."
            Article 0 comments Cited 266 times – based on 0 reviews     Review now
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              Measurements of energetic proton transport through magnetized plasma from intense laser interactions with solids

              E. L. Clark, K. Krushelnick, J Davies … (2000)
              Protons with energies up to 18 MeV have been measured from high density laser-plasma interactions at incident laser intensities of 5x10(19) W/cm(2). Up to 10(12) protons with energies greater than 2 MeV were observed to propagate through a 125 &mgr;m thick aluminum target and measurements of their angular deflection were made. It is likely that the protons originate from the front surface of the target and are bent by large magnetic fields which exist in the target interior. To agree with our measurements these fields would be in excess of 30 MG and would be generated by the beam of fast electrons which is also observed.
              Article 0 comments Cited 260 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (publisher-id): PRLTAO
                Title: Physical Review Letters
                Abbreviated Title: Phys. Rev. Lett.
                Publisher: American Physical Society (APS)
                ISSN (Print): 0031-9007
                ISSN (Electronic): 1079-7114
                Publication date Created: October 2000
                Publication date (Electronic): October 2 2000
                Volume: 85
                Issue: 14
                Pages: 2945-2948
                Article
                DOI: 10.1103/PhysRevLett.85.2945
                PubMed ID: 11005974
                SO-VID: 5d5916bb-328a-478f-9b10-d3e69a472a02
                Copyright © © 2000
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                http://link.aps.org/licenses/aps-default-license

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