论文标题
因离子停止在激光驱动的等离子体中引起的不同融合反应概率，温度不同
Varied fusion reaction probability induced by ion stopping modification in laser-driven plasma with different temperature
论文作者
论文摘要
血浆中核反应的动力学是许多高能量密度研究的基本问题，例如天体物理反应和惯性限制融合。需要考虑有效的反应横截面和离子停止功率，以分析反应性。在这项研究中，我们通过实验研究了分别由两个激光脉冲驱动的杜特隆束与氘化聚苯乙烯（CD）血浆之间的相互作用的D-D反应。已经测量了血浆中的中子产量，血浆密度和杜特隆能量损失，并且已经通过模拟分析了等离子体温度和Deuteron停止功率。结果表明，与冷目标相比，可以增强或抑制等离子体条件中的反应概率，这归因于杜特隆在等离子体中停止功率修饰。在较热的CD血浆中，中等能量杜特龙的能量损失减少，这会导致较高的D-D反应概率，而相反的情况发生在较冷的血浆中。这项工作为等离子体环境中的融合反应提供了新的了解。
The dynamics of nuclear reaction in plasma is a fundamental issue in many high energy density researches, such as the astrophysical reactions and the inertial confinement fusion. The effective reaction cross-sections and ion stopping power in plasma need to be taken into account to analyze the reactivity. In this research, we have experimentally investigated the from D-D reactions from interactions between deuteron beams and deuterated polystyrene (CD) plasma, driven by two laser pulses respectively. The neutron yields, plasma density and deuteron energy loss in plasma have been measured, and the plasma temperature and deuteron stopping power have been analyzed from simulations. It is shown that, compared with a cold target, the reaction probability in plasma conditions can be enhanced or suppressed, which is ascribed to the deuteron stopping power modifications in plasma. In hotter CD plasma, the energy loss of moderate energetic deuterons reduces, which leads to higher D-D reaction probability, while the contrary happens in colder plasma. This work provides new understanding of fusion reactions in plasma environment.
