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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers >Dependence of Proton Source Size on Proton Energy Accelerated by Ultrashort Laser Pulse
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Dependence of Proton Source Size on Proton Energy Accelerated by Ultrashort Laser Pulse

机译：质子源大小对超短激光脉冲加速质子能量的依赖

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摘要

The dependence of proton source size on proton energy, which was accelerated by the irradiation of ultrashort laser pulses on a 5-μm-thick copper tape target, was studied. Laser intensity was varied from 8.5 x 10~(17) to 6.6 x 10~(18)W/cm~2, and pulse duration from 55 to 400 fs. Source size decreases as proton energy increases under all laser conditions. When the dependence of source size on proton energy is fitted by power-law scaling, power-law exponent decreases from —0.7 to —1.3 as laser intensity increases from 8.5 x 10~(17) to 6.6 x 10~(18) W/cm~2.
机译：研究了质子源大小对质子能量的依赖性，该质量因在5μm厚的铜带靶上照射超短激光脉冲而加速。激光强度从8.5 x 10〜（17）到6.6 x 10〜（18）W / cm〜2不等，脉冲持续时间从55到400 fs。在所有激光条件下，源尺寸都会随着质子能量的增加而减小。当通过幂律定标拟合源尺寸对质子能量的依赖性时，随着激光强度从8.5 x 10〜（17）增至6.6 x 10〜（18）W /，幂律指数从-0.7降低至-1.3厘米〜2。

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