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 $3\ifmmode\times\else\texttimes\fi{}{10}^{20}\mathrm{W}{\mathrm{cm}}^{\ensuremath{-}2}$. Up to 48 J ( $12%$) of the laser energy is transferred to $2\ifmmode\times\else\texttimes\fi{}{10}^{13}$ protons of energy $>10\mathrm{MeV}$. 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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The record
- Venue
- Physical Review Letters
- Topic
- Laser-Plasma Interactions and Diagnostics
- Field
- Physics and Astronomy
- Canadian institutions
- University of Alberta
- Funders
- —
- Keywords
- Collimated lightProtonIrradiationBeam (structure)Atomic physicsLaserPhysicsMaterials scienceEnergy (signal processing)OpticsNuclear physics
- Has abstract in OpenAlex
- yes