Double-beam laser-driven ion acceleration device

Abstract

The invention relates to a double-beam laser-driven ion acceleration device. The double-beam laser-driven ion acceleration device mainly comprises a laser beam splitting system, an optical delay system, a preheating system and an acceleration system. According to the double-beam laser-driven ion acceleration device of the invention, the laser beam splitting system is utilized to divide a main laser pulse into preheating light and pump light, the optical delay system is utilized to adjust time delay between the preheating light and the pump light, then the preheating system is utilized to enable the preheating light and a laser target to interact to heat and diffuse the laser target, and finally, the pump light and the expanded and diffused laser target interact to accelerate ions by using the acceleration system. The density distribution of the laser target in the laser ion acceleration process can be optimized by adjusting the parameters of the double laser beams, and the ion beams can be effectively accelerated. The method has the advantages of being convenient to operate, accurate in time delay, high in repetition rate, high in energy conversion efficiency and the like.

Description

technical field [0001] The invention relates to the technical field of laser ion acceleration, in particular to a dual-beam laser-driven ion acceleration device. Background technique [0002] Compact high-quality ion sources (low energy dispersion, high energy, high current intensity) have broad application prospects in national energy strategy and civil needs, such as tumor treatment, proton imaging, injection level of traditional accelerators and fast ignition schemes in laser fusion, etc. The 2018 Nobel Prize in Physics was awarded to Mourou and Strickland for their contribution to the generation of ultrashort and ultra-intense laser pulses; now, Chirped Pulse Amplification (CPA) can advance laser focus power density even more than 10 22 W / cm 2 This ultra-short and ultra-intense laser pulse provides a new physical condition and approach for ion acceleration. Compared with traditional accelerators, the acceleration gradient of ion acceleration based on the interaction b...

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Problems solved by technology

However, the pre-pulse of the laser is uncontrollable, so the density distribution of the generated near-critical density plasma is unstable, resulting in the reproducibility of the ion beam parameters generated by acceleration is not strong, which cannot meet the needs of practical applications such as tumor treatment.

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