【摘 要】
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In order to generate high quality ion beams through the stable radiation pressure acceleration (RPA) of the near critical density (NCD) target,we propose a new
【机 构】
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Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of
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In order to generate high quality ion beams through the stable radiation pressure acceleration (RPA) of the near critical density (NCD) target,we propose a new type of target where an ultra-thin high density (HD) layer is attached to the front surface of an NCD target,which has a preferable self-supporting property in the RPA experiments than the ultra-thin foil target.It is found that in one-dimensional particle-in-cell (PIC) simulation,by the block of the HD layer in the new target,there emerges the hole-boring process rather than propagation in the NCD layer when the intense laser pulse impinges on this target.As a result,a typical RPA structure that the compressed electron layer overlaps the ion layer as a whole is formed and a high quality ion beam is obtained,e.g.,a circularly polarized laser pulse with normalized amplitude a0 =120impinges on this new target and a 1.2 GeV monoenergetic ion beam is generated through the RPA of the NCD layer.Similar results are also found in the two-dimensional PIC simulation.
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