Intense High-Energy Proton Beams from Petawatt-Laser Irradiation of Solids
Интенсивные пучки высокоэнергетических протонов при облучении твердых тел петаваттным лазером
2000-10-02
SCID: 54.1/j8q4qfet
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high-energy proton beamslaser-driven proton accelerationpetawatt-laser irradiationproton-induced nuclear processessolid targets
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Abstract (AI)
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.
Key Findings
1
At 1 PW and 3×10^20 W cm^-2, up to 48 J, corresponding to 12% of laser energy, transfers to 2×10^13 protons above 10 MeV.
2
Petawatt-laser irradiation of thin solid targets produces an intense, collimated high-energy proton beam emitted normal to the rear surface.
3
Proton-induced nuclear processes were observed and used to characterize the generated beam.
4
The proton spectrum has a sharp high-energy cutoff reaching 58 MeV on axis, with cutoff energy decreasing at larger off-axis angles.
Research Object
High-energy proton beams generated by petawatt-laser irradiation of thin solid targets
Research Subject
Beam energy transfer, proton energy spectrum and angular dependence, collimation, and nuclear-process signatures
Publication Details
Publication Date
2000-10-02
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