Advanced scheme for high-yield laser driven nuclear reactions
Advanced scheme for high-yield laser driven nuclear reactions
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高产激光驱动核反应先进方案
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
G. Korn
中科院分区：
文献类型：
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作者：
D. Margarone;A. Picciotto;A. Velyhan;J. Krása;M. Kucharik;A. Mangione;A. Szydlowsky;A. Malinowska;G. Bertuccio;Y. Shi;M. Crivellari;J. Ullschmied;P. Bellutti;G. Korn
使用相对较低强度（3 × 1016 W cm−2）的低对比度纳秒激光脉冲可以提高先进固体靶中诱导核反应的产率。特别是选择了“超洁净”质子-硼聚变反应，产生高能阿尔法粒子而不产生中子。富氢硅衬底中空间明确的硼掺杂剂层被用作目标。特定目标成分和激光脉冲时间形状的结合可以将 α 粒子的产量提高到每球面度 109 个。这一结果可归因于长激光预脉冲与目标的相互作用以及最佳的目标几何形状和成分。
The use of a low contrast nanosecond laser pulse with a relatively low intensity (3 × 1016 W cm−2) allowed the enhancing of the yield of induced nuclear reactions in advanced solid targets. In particular the ‘ultraclean’ proton–boron fusion reaction, producing energetic alpha particles without neutron generation, was chosen. A spatially well-defined layer of boron dopants in a hydrogen-enriched silicon substrate was used as a target. A combination of the specific target composition and the laser pulse temporal shape allowed the enhancing of the yield of alpha particles up to 109 per steradian. This result can be ascribed to the interaction of the long-laser pre-pulse with the target and to the optimal target geometry and composition.