We present preliminary results on generation of energetic α-particles driven by lasers. The experiment was performed at the Institute of Laser Engineering in Osaka using the short-pulse, high-intensity, high-energy, PW-class laser. The laser pulse was focused onto a thin plastic foil (pitcher) to generate a proton beam by the well-known TNSA mechanism which, in turn, was impinging onto a boron-nitride (BN) target (catcher) to generated alpha-particles as a result of proton-boron nuclear fusion events. Our results demonstrate generation of α-particles with energies in the range 8–10 MeV and with a flux around 5 × 10⁹ sr⁻¹.

中文翻译：

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多kJ Peta-Watt类激光系统产生α粒子束

我们介绍了由激光驱动的高能α粒子的产生的初步结果。该实验是在大阪的激光工程研究所使用短脉冲，高强度，高能量的PW级激光器进行的。激光脉冲通过众所周知的TNSA机理聚焦在薄塑料箔上（质子）产生质子束，该质子束又撞击到氮化硼（BN）靶材（俘获剂）上，从而生成α粒子。质子-硼核聚变事件的结果。我们的结果表明，生成的α粒子的能量范围为8-10 MeV，通量约为5×10 ⁹ sr ^-1。