Intense tera-hertz laser driven proton acceleration in plasmas

Sharma, Ashutosh and Tibai, Zoltán and Hebling, János (2016) Intense tera-hertz laser driven proton acceleration in plasmas. Physics of Plasmas, 23 (6). No.-063111. ISSN 1070-664X

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Abstract

We investigate the acceleration of a proton beam driven by intense tera-hertz (THz) laser field from a near critical density hydrogen plasma. Two-dimension-in-space and three-dimension-in-velocity particle-in-cell simulation results show that a relatively long wavelength and an intense THz laser can be employed for proton acceleration to high energies from near critical density plasmas. We adopt here the electromagnetic field in a long wavelength (0.33 THz) regime in contrast to the optical and/or near infrared wavelength regime, which offers distinct advantages due to their long wavelength (k ¼ 350 lm), such as the k2 scaling of the electron ponderomotive energy. Simulation study delineates the evolution of THz laser field in a near critical plasma reflecting the enhancement in the electric field of laser, which can be of high relevance for staged or post ion acceleration.

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