Abstract
We have observed simultaneously both the fast proton generation and terahertz (THz) radiation in the laser pulse interaction with a 5-μm thick titanium target. In order to control the proton acceleration and THz radiation, we have changed the duration of the amplified spontaneous emission (ASE) preceding the main pulse generated by the high-intensity Ti:sapphire laser. A fast proton beam with the maximal energy of ∼ 490 keV has been realized by reducing the duration of the ASE. Simultaneously, an intense emission of THz radiation is observed for various ASE durations. We propose the antenna mechanism for the THz radiation, according to which the fast electrons moving along the target surface emit the low-frequency electromagnetic wave.
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52.25.Os; 52.38.Kd; 52.50.Jm
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Sagisaka, A., Daido, H., Nashima, S. et al. Simultaneous generation of a proton beam and terahertz radiation in high-intensity laser and thin-foil interaction. Appl. Phys. B 90, 373–377 (2008). https://doi.org/10.1007/s00340-008-2931-8
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DOI: https://doi.org/10.1007/s00340-008-2931-8