Abstract
In order to generate high quality ion beams through a relatively uniform radiation pressure acceleration (RPA) of a common flat foil, a new scheme is proposed to overcome the curve of the target while being radiated by a single transversely Gaussian laser. In this scheme, two matched counterpropagating transversely Gaussian laser pulses, a main pulse and an auxiliary pulse, impinge on the foil target at the meantime. It is found that in the two-dimensional (2D) particle-in-cell (PIC) simulation, by the restraint of the auxiliary laser, the curve of the foil can be effectively suppressed. As a result, a high quality monoenergetic ion beam is generated through an efficient RPA of the foil target. For example, two counterpropagating transversely circularly polarized Gaussian lasers with normalized amplitudes ${a}_{1}=120$ and ${a}_{2}=30$, respectively, impinge on the foil target at the meantime, a 1.3 GeV monoenergetic proton beam with high collimation is obtained finally. Furthermore, the effects on the ions acceleration with different parameters of the auxiliary laser are also investigated.
Highlights
The high quality ion acceleration through the interaction of the intense laser with plasma has been widely studied in recent years, which has many significant applications in diverse fields, such as low-cost tabletop accelerator [1], hadron therapy of oncological diseases [2] and the fast ignition in the inertial confinement fusion [3]
By the 2D PIC simulation, we have proved that high quality ion beams can be generated through a relatively more uniform radiation pressure acceleration (RPA) of the flat foil target by adding another matched transversely Gaussian auxiliary laser
By varying the different parameters of the auxiliary laser, the effects of different parameters of the auxiliary laser in our scheme are investigated, and it is found that all the parameters of the auxiliary laser, including the intensity, the waist radius, and the pulse width, have influences on the quality of the accelerated ion beam
Summary
The high quality ion acceleration through the interaction of the intense laser with plasma has been widely studied in recent years, which has many significant applications in diverse fields, such as low-cost tabletop accelerator [1], hadron therapy of oncological diseases [2] and the fast ignition in the inertial confinement fusion [3]. If we can realize a high quality ion acceleration by using the normal transversely Gaussian laser and the common flat foil target, which could be respectively easier obtained in an ordinary laboratory, the requirement of experiment condition could be vastly reduced. We propose a new scheme to generate high quality ion beams by using the normal transversely Gaussian laser and the common flat foil target.
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