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Deuterium‐tritium fuel impact ignition in the presence of degenerate plasma
Contributions to Plasma Physics ( IF 1.3 ) Pub Date : 2021-01-19 , DOI: 10.1002/ctpp.202000188 Seddigheh Pourhosseini 1 , Abbas Ghasemizad 1 , Somayeh Rezaei 2 , Mohammad J. Jafari 2
Contributions to Plasma Physics ( IF 1.3 ) Pub Date : 2021-01-19 , DOI: 10.1002/ctpp.202000188 Seddigheh Pourhosseini 1 , Abbas Ghasemizad 1 , Somayeh Rezaei 2 , Mohammad J. Jafari 2
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The impact ignition model is proposed based on the collision of a deuterium‐tritium (DT) layer accelerated to high velocities in a conical target. Simple mechanism, low cost, high coupling efficiency, and lack of the need for Petawatt laser pulses are the prominent advantages of this model. However, an increase in the productivity of this ignition mechanism is an important issue. In this regard, in this paper, the idea of impact ignition using the plasma degeneracy mechanism has been investigated. For this purpose, first, the ignition energy gain and stopping power of the DT beam in pure and impure fuels, by employing both degenerate and non‐degenerate plasmas, have been examined numerically. Then, in order to assess the penetration depth and range of the incident beam, simulations have been carried out using a three‐dimensional (3D) Monte Carlo code for two states of degenerate and non‐degenerate pre‐compressed pure fuel. The results imply that the state of degeneracy causes an increase by about 63% in the energy gain of impact ignition. In addition, the degeneracy condition leads to an approximate enhancement of 60% in the energy deposition of the pure fuel and about 67% for the impure fuel, with a mixed density ratio of 1.5%; therefore, the range and penetration depth decrease significantly in comparison to the non‐degenerate one. This can be indicative of the increasing efficiency of impact ignition conditions in the presence of degenerate plasma. The results of the range for the pure fuel have also been confirmed by a 3D Monte Carlo simulation code.
中文翻译：
简并等离子体存在下的氘‐燃料碰撞点火
基于锥形靶中加速到高速的氘-（（DT）层的碰撞，提出了碰撞点火模型。该模型的突出优点是结构简单，成本低，耦合效率高以及无需使用Petawatt激光脉冲。但是，该点火机构的生产率的提高是重要的课题。在这方面，在本文中，已经研究了利用等离子体简并机理的冲击点火的想法。为此，首先，DT的点火能量增益和停止功率通过使用简并等离子体和非简并等离子体，对纯燃料和不纯燃料中的电子束进行了数值检查。然后，为了评估入射光束的穿透深度和射程，已使用三维（3D）蒙特卡洛代码对简并和未简并预压缩纯燃料的两种状态进行了模拟。结果表明，简并状态导致冲击点火的能量增加约63％。另外，简并条件导致纯燃料的能量沉积大约提高60％，不纯燃料的能量沉积大约提高67％，混合密度比为1.5％。因此，与未退化的相比，射程和穿透深度显着减小。这可以指示在存在简并等离子体的情况下冲击点火条件的效率提高。纯燃料范围的结果也已通过3D蒙特卡洛模拟代码得到确认。
更新日期：2021-01-19
中文翻译：
简并等离子体存在下的氘‐燃料碰撞点火
基于锥形靶中加速到高速的氘-（（DT）层的碰撞，提出了碰撞点火模型。该模型的突出优点是结构简单，成本低，耦合效率高以及无需使用Petawatt激光脉冲。但是，该点火机构的生产率的提高是重要的课题。在这方面，在本文中，已经研究了利用等离子体简并机理的冲击点火的想法。为此，首先，DT的点火能量增益和停止功率通过使用简并等离子体和非简并等离子体，对纯燃料和不纯燃料中的电子束进行了数值检查。然后，为了评估入射光束的穿透深度和射程，已使用三维（3D）蒙特卡洛代码对简并和未简并预压缩纯燃料的两种状态进行了模拟。结果表明，简并状态导致冲击点火的能量增加约63％。另外，简并条件导致纯燃料的能量沉积大约提高60％，不纯燃料的能量沉积大约提高67％，混合密度比为1.5％。因此，与未退化的相比，射程和穿透深度显着减小。这可以指示在存在简并等离子体的情况下冲击点火条件的效率提高。纯燃料范围的结果也已通过3D蒙特卡洛模拟代码得到确认。
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